Sort the following reactions as either endothermic or exothermic.
- Making popcorn in a microwave oven :
- Burning rocket fuel :
- Boiling water
- A burning match
- The reaction inside a chemical heat pack
Answers
Following reactions are mentioned along with options : Making popcorn in a microwave oven :endothermic , Burning rocket fuel : endothermic , Boiling water : endothermic , A burning match : exothermic and The reaction inside a chemical heat pack is exothermic
Here are the following reactions sorted as either endothermic or exothermic:Endothermic reactions:Making popcorn in a microwave oven: This reaction is an endothermic reaction as it requires an input of energy. The microwave oven provides the energy needed to pop the kernels.
Burning rocket fuel: This reaction is an endothermic reaction because rocket fuels must be heated to very high temperatures before they ignite.Exothermic reactions:Boiling water: This reaction is an exothermic reaction because it releases heat as the water boils.
A burning match: This reaction is exothermic because it releases heat and light as the match burns.The reaction inside a chemical heat pack: This reaction is exothermic because it releases heat as the chemicals react together in the pack.
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Related Questions
which compound will form the most intensely colored 0.01 m aqueous solution?
Answers
The compound that will form the most intensely colored 0.01 M aqueous solution will depend on the specific compound and its ability to exhibit color in solution.
The compound that will form the most intensely colored 0.01 M aqueous solution will depend on the specific compound and its ability to exhibit color in solution. Without knowing the specific compounds being considered, it is difficult to provide a definitive answer. Different compounds can exhibit a wide range of colors based on their molecular structure and electronic transitions.
In general, compounds with highly conjugated systems or transition metal complexes tend to exhibit intense colors in solution. These compounds often have extended delocalized π-electron systems that allow for absorption of light in the visible range, resulting in the observed color.
To determine which compound would form the most intensely colored solution, it would be necessary to consider the specific compounds and their molecular structures, including the presence of conjugated systems or transition metal ions. Conducting experiments or consulting references specific to the compounds in question would provide more accurate information regarding their coloration in aqueous solution.
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the best evidence that two continents were once connected is that they_?
a. have similar rocks and fossils
b. are at the same latitude
c. have the same climate
d. are at the same longitude
Answers
An object has a DENSITY of 10.00 g/mL. If the object has a VOLUME of 25.00 mL .. what is the MASS (g)?
Answers
Answer:
250 gExplanation:
The mass of a substance when given the density and volume can be found by using the formula
mass = Density × volume
From the question we have
mass = 10 × 25
We have the final answer as
250 gHope this helps you
Each element is defined by the number of
Answers
Answer:
The atomic number of an element is equal to the number of protons in each atom and defines the element. For example, all carbon atoms contain 6 protons in their atomic nucleus; so the atomic number of carbon is 6.
What does the number of an element represent?
The atomic number or proton number (symbol Z) of a chemical element is the number of protons found in the nucleus of every atom of that element. The atomic number uniquely identifies a chemical element. It is identical to the charge number of the nucleus.
There seem to be 118 elements in all that exist today, 94 of which occur naturally and the remaining 24 are created artificially. Each element is defined by the number of proton.
What is element?An element is a material that, when heated or illuminated, cannot be divided into two main or more simpler compounds by any chemical technique. For example, when a piece of gold is melted, it still melts but stays the gold element.
These compounds are made up of a single type of atom, making them monoatomic. Elements are thought to be the fundamental building units of matter. There seem to be 118 elements in all that exist today, 94 of which occur naturally and the remaining 24 are created artificially. Each element is defined by the number of proton.
Therefore, each element is defined by the number of proton.
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A 23. 5-liter balloon holding 3. 0 moles of carbon dioxide. There was a leak and now there is 1 mole of carbon dioxide, what is the new volume of the balloon?
Answers
The new volume of the balloon after the leak, with 1 mole of carbon dioxide, is approximately 7.05 liters. The ideal gas law equation, PV = nRT, relates the pressure (P), volume (V), number of moles (n), gas constant (R), and temperature (T) of a gas.
In this case, we can assume constant temperature and pressure. Initially, the balloon had a volume of 23.5 liters and contained 3.0 moles of carbon dioxide. We can use the equation to find the initial number of moles:
\(\[ P_1 \cdot V_1 = n_1 \cdot R \cdot T \]\)
Similarly, after the leak, the balloon contains 1 mole of carbon dioxide. We can find the new volume using the equation:
\(\[ P_2 \cdot V_2 = n_2 \cdot R \cdot T \]\)
Since the pressure and temperature are constant, we can rewrite the equations as:
\(\[ \frac{{V_1}}{{n_1}} = \frac{{V_2}}{{n_2}} \]\)
Plugging in the values, we have:
\(\[ \frac{{23.5 \text{ L}}}{{3.0 \text{ mol}}} = \frac{{V_2}}{{1.0 \text{ mol}}} \]\)
Solving for \(\(V_2\)\), we find \(\(V_2 \approx 7.05 \text{ L}\)\), which is the new volume of the balloon after the leak.
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Which of the following experiments most directly supports particle-like nature of light? black-body radiation alpha-particle scattering by metal foil the emission spectrum of the hydrogen atom electron diffraction by crystal the photoelectric effect
Answers
The emission spectrum of the hydrogen atom experiment most directly supports the particle-like nature of light. This experiment showed that when hydrogen gas is excited, it emits light at specific wavelengths, creating a unique spectral pattern.
This can be explained by the idea that the energy of the excited electrons in the hydrogen atom is quantized, meaning they can only release energy in discrete packets (photons) at specific wavelengths. This supports the particle-like nature of light, as it suggests that light behaves like individual packets of energy rather than a continuous wave.
The experiment that most directly supports the particle-like nature of light among the given options is the photoelectric effect.The photoelectric effect involves the emission of electrons from a material when it is exposed to light. This phenomenon supports the particle-like nature of light because it shows that light is composed of individual packets of energy called photons. When these photons interact with the material, they transfer their energy to the electrons, allowing them to be emitted from the material. This process cannot be explained solely by the wave-like nature of light and thus demonstrates the particle-like nature of light.
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The experiment that most directly supports the particle-like nature of light is the photoelectric effect.
Which experiments support the particle nature of light?This phenomenon occurs when light shines on a material, and electrons are ejected from the surface of that material. The photoelectric effect demonstrated that light has particle-like properties because the energy of ejected electrons depends on the frequency of the incident light, not its intensity. This behavior can only be explained if light consists of discrete energy packets, called photons, rather than behaving as continuous waves.
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How many moles of 02 are produced by the decomposition of 6.2 moles of KCLO3 Balance reaction first _KCLO3 _KCL +_ O2
Answers
Number of moles of O2 produced by the decomposition of 6.2 moles of KCLO3 is 9.3 moles.
The mole idea is a useful way to indicate how much of a substance there is. Any measurement can be divided into two components: the magnitude in numbers and the units in which the magnitude is expressed.
Initial reaction,
KCLO3 ⇒ KCL + O2
The ratio is 1: 1 for KClO3 and O2
After balancing the equation we get,
2KClO3 ⇒ 2KCl + 3O2
So ratio of KClO3 and O2 is now 2:3
For every 2 moles of KClO3 we have 3 moles of O2 so
For 6.2 moles of KCLO3,
Number of moles of O2 = 6.2x3/2
= 9.3 moles
Therefore, number of moles of O2 produced by the decomposition of 6.2 moles of KCLO3 is 9.3 moles.
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give the charges of the cation in each of the following compounds cao , na2so4 , kclo4 , fe (no3) 2 , cr (oh) 3 .
Answers
Calcium oxide (CaO) has a cation with a charge of +2, while sodium sulfate (Na2SO4) and potassium perchlorate (KClO4) have cations with a charge of +1. Iron (II) nitrate (Fe(NO3)2) has a cation with a charge of +2, and chromium (III) hydroxide (Cr(OH)3) has a cation with a charge of +3.
1. CaO: In this compound, the cation is calcium (Ca). Calcium is in Group 2 of the periodic table, so it forms a 2+ cation. Therefore, the charge of the cation in CaO is +2.
2. Na2SO4: In this compound, the cation is sodium (Na). Sodium is in Group 1 of the periodic table, so it forms a 1+ cation. Therefore, the charge of the cation in Na2SO4 is +1.
3. KClO4: In this compound, the cation is potassium (K). Potassium is also in Group 1 of the periodic table, so it forms a 1+ cation. Therefore, the charge of the cation in KClO4 is +1.
4. Fe(NO3)2: In this compound, the cation is iron (Fe). The compound has a subscript of 2 for the nitrate ions (NO3), which have a 1- charge each. This means that the iron cation must have a charge of +2 to balance the charges. Therefore, the charge of the cation in Fe(NO3)2 is +2.
5. Cr(OH)3: In this compound, the cation is chromium (Cr). The compound has a subscript of 3 for the hydroxide ions (OH), which have a 1- charge each. This means that the chromium cation must have a charge of +3 to balance the charges. Therefore, the charge of the cation in Cr(OH)3 is +3.
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Who discovered the structure of insulin?
Answers
A gas has a pressure of 100 kPa, a volume of 43.2 mL at a temperature of 19 C. What will be is volume is the pressure is changed to 101.3 kPa at 0 C?
Answers
Answer:
100=43.2
101.3=x
100x=101.3×43.2
100x=4376.16
x=4376.16/100
x=43.7616
list 2 ways mechanical energy can be transformed into non-mechanical energy ?
Answers
Answer:
One is the classic example of friction. When two surfaces rub together, they generate thermal energy, or heat. This is a transformation of the mechanical kinetic energy of the objects into the thermal non-mechanical energy (which is small-scale kinetic energy).
Mechanical energy can be used to overcome friction or lost in form of heat in machine parts. Friction and heat are two non-mechanical energy.
Transformation of mechanical energy into non mechanical energy
Based on the principle of conservation of energy, energy can neither be created nor destroyed but can be transformed from one form to another.
Two ways mechanical energy can be transformedThe two ways mechanical energy can be transformed include the following;
FrictionHeatMechanical energy can be used to overcome friction or lost in form of heat in machine parts, in this process, the mechanical energy (kinetic energy) would be converted into other forms of energy such as heat.
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Which of these constituents of an aqueous solution can transmit charge in a current? (Choose at least one answer.)
chloride ions
sodium atoms
acetic acid molecules
water molecules
electrons protons
sodium ions
hydroxide ions
acetate ions
Answers
The constituents of an aqueous solution that can transmit charge in a current are: chloride ions, sodium ions, hydroxide ions, and acetate ions.
In an aqueous solution, ions are responsible for transmitting charge in a current. When certain substances dissolve in water, they dissociate into ions, which are electrically charged particles. These ions can move freely in the solution and facilitate the flow of electric current.
Common ions found in aqueous solutions include:
Cations: Positively charged ions. Examples include hydrogen ions (H+), sodium ions (Na+), potassium ions (K+), calcium ions (Ca2+), and magnesium ions (Mg2+).
Anions: Negatively charged ions. Examples include hydroxide ions (OH-), chloride ions (Cl-), sulfate ions (SO42-), nitrate ions (NO3-), and carbonate ions (CO32-).
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what atomic or hybrid orbitals make up the bond between c1 and c2 in propyne , chcch3 ? orbital on c1 orbital on c2 how many σ bonds does c1 have in chcch3 ? how many bonds does c1 have ?
Answers
In propyne, C1 has four bonds in the structure ch1ch3; these bonds are made up of atomic or hybrid orbitals. No atom from any compound has ever reached us, although the idea of hybridization has been introduced.
To describe how distinct molecules' shapes differ. According to the "valence shell electron-pair repulsion theory," also known as the VSEPR theory, the sigma bonds made by the hybridized orbitals on the central atom are spatially orientated to be as far apart from one another as possible. The form of the molecule is determined by its orientation. And it is typically noticed that the shapes predicted by this theory match the shapes of molecules that have been actually observed.
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Which is the best example of a pure substance?
gold
air
peanuts
milk
Answers
Peanuts, or milk please leave like if right
Answer:
air
Explanation:
A substance that has a fixed chemical composition throughout is called a pure substance such as water, air, and nitrogen. A pure substance does not have to be of a single element or compound.
an ion with a positive charge is called a(n) , whereas an ion with a negative charge is called a(n)
Answers
An ion with a positive charge is called a cation, whereas an ion with a negative charge is called an anion.
An ion with a positive charge is called a cation, whereas an ion with a negative charge is called an anion. Ions are atoms or molecules that have lost or gained one or more electrons, giving them a positive or negative charge. Ions play a crucial role in many chemical reactions and are found in a variety of materials.
Ions are classified as cations and anions based on their charge.
Cations: Cations are ions that have lost one or more electrons and have a positive charge. Sodium ion (Na+) is an example of a cation. Sodium atoms lose one electron, giving them a positive charge.
Anions: Anions are ions that have gained one or more electrons and have a negative charge. Chloride ion (Cl-) is an example of an anion. Chlorine atoms gain an electron, giving them a negative charge.
Thus, an ion with a positive charge is called a cation, whereas an ion with a negative charge is called an anion.
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A 0.420 M Ca(OH)2 solution was prepared by dissolving 64.0 grams of Ca(OH)2 in enough water. What is the total volume of the solution formed? (4 points) a1.07 liters b1.23 liters c2.05 liters d2.18 liters
Answers
ANSWER
the volume of the solution is 2.05 liters
EXPLANATION
Given that;
The concentration of Ca(OH)2 is 0.420M
The grams of Ca(OH)2 is 64.0 grams
Follow the steps below to find the volume of the solution
Step 1; Calculate the number of moles of Ca(OH)2 using the below formula
\(\text{ mole = }\frac{\text{ mass}}{\text{ molar mass}}\)Recall, that the molar mass of Ca(OH)2 is 74.093 g/mol
\(\begin{gathered} \text{ mole = }\frac{\text{ 64}}{74.093} \\ \text{ mole = 0.864 mole} \end{gathered}\)Step 2; Find the volume of the solution in liters using the below formula
\(\text{ Molarity = }\frac{\text{ moles of the solute}}{\text{ liters of solution}}\)\(\begin{gathered} \text{ 0.420 = }\frac{\text{ 0.864}}{\text{ V}} \\ \text{ cross multiply} \\ \text{ 0.420V = 0.864} \\ \text{ Divide both sides by 0.420} \\ \text{ }\frac{\text{ 0.420V}}{0.420}\text{ = }\frac{\text{ 0.864}}{\text{ 0.420}} \\ \text{ V = 2.05 Liters} \end{gathered}\)Therefore, the volume of the solution is 2.05 liters
What is the empirical formula of a compound containing 5.03 grams carbon, 0.42 grams hydrogen, and 44.5 grams chlorine?
a. c2h5ci
b. c2h2c1
c. chcia
d. chci
Answers
The empirical formula of the compound is CHCl₃.
Calculation:Given,
Mass of carbon = 5.03 g
Mass of hydrogen = 0.42 g
Mass of chlorine = 44.5 g
Molecular weight of carbon = 12 g
Molecular weight of hydrogen = 1 g
Molecular weight of chlorine = 35.4 g
First, calculate the moles of each element,
Moles = given mass/ molecular weight
Moles of carbon = 5.03/12 = 0.42
Moles of hydrogen = 0.42/1 = 0.42
Moles of chlorine = 44.5/ 35.4 = 1.26
Divide the moles of each element by the smallest number of moles,
0.42 mol of C/ 0.42 = 1 C
0.42 mol of H/ 0.42 = 1 H
1.26 mol of Cl/0.42 = 3 Cl
The ratio of elements is 1:1:3
Therefore the empirical formula of the compound will be CHCl₃.
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Answer:CHCl₃
Explanation:
Which of these is an example of a resistor?
A
a battery, which has a positive and negative terminal
B
a light bulb that impedes the flow of electricity
C
an electrical charge moving at a constant rate
D
a conductive path that forms a closed loop
Answers
The correct example of a resistor is option (B) a light bulb that impedes the flow of electricity.
A light bulb that impedes the flow of electricity is an example of a resistor.
A resistor is a passive two-terminal electrical element that implements electrical resistance as a circuit element. In digital circuits, resistors are used to reduce modern flow, regulate sign stages, to divide voltages, bias lively elements, and terminate transmission lines, amongst different uses.
A resistor is an electrical thing that limits or regulates the flow of electrical current in an electronic circuit. Resistors can also be used to offer a specific voltage for an lively tool such as a transistor.
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HELP ASAP WILL MARK BRAINLIEST: How many grams of aluminum can be extracted from 5000g of alumina
Answers
The grams of aluminium extracted from 5000g of alumina is 2647 grams
Chemical formula of alumina:Al₂O₃
Let's calculate the molecular mass of Al₂O₃
Al₂O₃ = 27 × 2 + 16 × 3 = 54 + 48 = 102 g/mol
Therefore,
102 g of Al₂O₃ = 54 g of aluminium
5000g of Al₂O₃ = ?
mass of aluminium produced = 5000 × 54 / 102
mass of aluminium produced = 270000 / 102
mass of aluminium produced = 2647.05882353
mass of aluminium produced = 2647 grams
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A 2 cation of a certain transition metal has six electrons in its outermost d subshell. Which transition metal could this be
Answers
A 2+ cation of a certain transition metal has six electrons in its outermost d subshell. This transition metal is Iron (Fe) .
To identify the transition metal with a 2+ cation having six electrons in its outermost d subshell, we need to understand the electron configuration of transition metals and their cations.
A transition metal is an element found in the d-block of the periodic table, and these metals are characterized by having partially filled d orbitals. The outermost d subshell refers to the d orbitals of the highest energy level in the electron configuration.
In this case, we're looking for a transition metal with a 2+ cation that has six electrons in its outermost d subshell. This means the neutral atom would have eight electrons in its outermost d subshell, as the 2+ cation loses two electrons.
The transition metal that fits this description is Iron (Fe), which has an atomic number of 26. Its electron configuration is [Ar] 4s2 3d6 for the neutral atom. When it forms a 2+ cation (Fe2+), it loses the two 4s electrons, resulting in the electron configuration [Ar] 3d6 (noble gas configuration) or 1s2 2s2 2p6 3s2 3p6 3d6 (electronic configuration) . This Fe2+ cation has six electrons in its outermost d subshell, making it the transition metal you are looking for.
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Ethylene glycol reacts in acid to form a cyclic compound with the formula of C4H8O2. Which one of the following is this cyclic compound
Answers
The cyclic compound that is formed is the structure that is found in Option A.
What is the product?We know that a chemical reaction involves the combination of two or more species to yield a product. Now, the compound that we call ethylene glycol is a dihydric alcohol and this implies that there are two -OH groups in the compound. We know that an alcohol must contain at least one -OH group.
There are three types of alcohol and these are;
- Monohydric alcohol
-Dihydric alcohol
- Polyhydric alcohol
The types of alcohol are classified according to the number of -OH groups present in the compound.
The reaction of this compound occurs in acid and the product that is formed is a cyclic compound.
The cyclic compound that is formed is the structure that is found in Option A.
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Use thermodynamic tables to determine the theoretical values of the thermodynamic parameters. The theoretical values of the thermodynamic parameters for dissolving of Ca(OH)2(s) in water are (show each calculation): ΔH° = _______________________ kJ/mol ΔS° = ______________________ J/mol-K
Answers
The theoretical values of the thermodynamic parameters for dissolving Ca(OH)₂(s) in water are: ΔH° = 20.4 kJ/mol and ΔS° = -222.7 J/mol-K.
How to find the thermodynamic values?The thermodynamic values for the dissolution of Ca(OH)₂(s) in water can be determined using the following equations:
ΔG° = ΔH° - TΔS°
ΔG° = -RTln(K)
where R is the gas constant (8.314 J/mol-K), T is the temperature in Kelvin, and K is the equilibrium constant for the reaction. At standard conditions (25°C or 298 K, 1 atm), the equilibrium constant for the reaction is 2.74x\(10^-^6\).
Using the second equation and the given value of K, we can solve for ΔG°:
ΔG° = -RTln(K)
ΔG° = -(8.314 J/mol-K)(298 K)ln(2.74x\(10^-^6\))
ΔG° = 68.2 kJ/mol
Now we can use the first equation to solve for ΔH° and ΔS°:
ΔG° = ΔH° - TΔS°
68.2 kJ/mol = ΔH° - (298 K)(ΔS°)
ΔH° = ΔS°(298 K) + 68.2 kJ/mol
To determine ΔS°, we can use the relationship between ΔG° and K:
ΔG° = -RTln(K)
ΔS° = -ΔG°/Tln(K)
Substituting the given values, we get:
ΔS° = -(68.2 kJ/mol)/(298 K)ln(2.74x\(10^-^6\))
ΔS° = -222.7 J/mol-K
Therefore, the theoretical values of the thermodynamic parameters for the dissolution of Ca(OH)₂(s) in water are:
ΔH° = 20.4 kJ/mol
ΔS° = -222.7 J/mol-K
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1. Explain why the cold water and hot water in Part 1 moved the way they did within the tub of
room-temperature water. In your explanation, be sure to compare the relative densities of the
water at each temperature
Answers
Answer:
Cooling a substance causes molecules to slow down and get slightly closer together, occupying a smaller volume that results in an increase in density. Hot water is less dense and will float on room-temperature water. Cold water is more dense and will sink in room-temperature water.
What is the pH of a 1.0 M solution of bleach (sodium hypochlorite, NaClO)? The Ka of the weak acid HClO is 2.9 x 10-8
Answers
The pH of a 1.0 M solution of bleach (sodium hypochlorite, NaClO) is 10.77. The hydroxide ions produced by the hydrolysis of NaClO will react with any H+ ions present in the solution to form water.
To find the pH of a 1.0 M solution of bleach (sodium hypochlorite, NaClO), we first need to consider the acid-base equilibrium that takes place in the solution. Sodium hypochlorite (NaClO) is a basic salt that hydrolyzes in water to produce hydroxide ions (OH-) and hypochlorous acid (HClO), a weak acid:
NaClO + H2O ⇌ Na+ + OH- + HClO
The equilibrium constant for this reaction is the base dissociation constant, Kb, which can be calculated from the acid dissociation constant, Ka, of HClO:
Kb = Kw / Ka = 1.0 x 10^-14 / 2.9 x 10^-8 = 3.45 x 10^-7
where Kw is the ion product constant of water (1.0 x 10^-14).
Since NaClO is a strong electrolyte, it will dissociate completely in water, yielding 1.0 M Na+ and 1.0 M ClO- ions. The equilibrium concentration of HClO can be calculated using the Kb expression:
Kb = [OH-][HClO] / [NaClO]
Assuming that the initial concentration of NaClO is 1.0 M and the concentration of OH- produced is x, the concentration of HClO formed is also x, and the concentration of Na+ remaining is (1.0 - x). Substituting these values into the Kb expression and solving for x, we get:
3.45 x 10^-7 = x^2 / (1.0 - x)
Solving for x, we get x = 5.87 x 10^-4 M.
Since the concentration of HClO is small compared to the initial concentration of NaClO, we can assume that the change in the concentration of Na+ and ClO- ions is negligible. Therefore, the concentration of OH- in the solution is also 5.87 x 10^-4 M.
Using the expression for the ion product constant of water, Kw = [H+][OH-], we can calculate the concentration of H+ ions in the solution:
Kw = [H+][OH-] = 1.0 x 10^-14
[H+] = Kw / [OH-] = 1.0 x 10^-14 / 5.87 x 10^-4 = 1.70 x 10^-11 M
Finally, we can calculate the pH of the solution using the pH expression:
pH = -log[H+] = -log(1.70 x 10^-11) = 10.77
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I need help with a CER for science cause its due tmr
_____________________________________________
Malic acid that algae releases chemically reacts with the calcium carbonate in the marble surface of the Taj Mahal.
Write 3 Evidence and 3 Reasoning
Answers
The Sulphur and nitrogen oxides attain the higher environment and blend with water forming nitric acid and sulphuric acid after which come down at the floor of the earth with precipitation. This is known as acid rain.
The white marble of Taj Mahal in Agra consists of Calcium. Whenever there may be acid rain in Agra, the nitric acid and sulphuric acid come at the side of precipitates.
These acids react with calcium carbonate of marble to shape calcium sulphate and calcium nitrate at the side of carbon dioxide and water. Marble consists of carbonate minerals, usually calcite and dolomite. Barium isn't always found in marbles which shape the Taj Mahal. So, the alternatives containing barium are removed.
The acid rain has a pH of much less than 5.6. It has unfavorable consequences at the animal skin, marbles and agriculture etc.
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Consider the following reaction… 5C + 2SO2 CS2 + 4CO a) How many moles of CS2 would be produced by reacting 9.50 moles of SO2 with an excess of C? _________________ b) How many grams of C would be needed to fully react 5.5 L of SO2 at STP? _________________ c) How many liters of CO can be produced from 20.0 moles of C at STP?
Answers
We first verify that the equation is balanced. We have 5 carbons (C), 2 sulfurs (S), and 4 oxygens (O) on each side of the reaction. So the reaction is balanced.
a) Now if we look at the reaction we can see that when 2 moles of SO2 react, 1 mole of CS2 is produced. That is, the ratio is 2 to 1. For each mole of SO2 half as many moles of CS2 will be produced.
So if we have 9.5 moles of SO2 we will have 9.5/2 moles, that is 4.75 moles of CS2.
Answer a) By reacting 9.50 moles of SO2 with an excess of it would be produced 4.75 moles of CS2.
Now, for the following parts of the question, we can apply the ideal gas law. This is because the reaction is in the gas phase and the law applies only to gases.
\(PV=nR_{}T\)Where,
P= Pressure at STP = 1 atm
T= Temperature at STP = 273.15K
R= Ideal law constant = 0.08206 (atm L)/(mol K)
V= Volume of the gas
n= Numer of moles
b)We clear n and we replace the known values of SO2 to find the number of moles of SO2 that react.
\(\begin{gathered} n=\frac{PV}{RT}=\frac{1at_{}m\times5.5L}{0.08206\frac{atm.L}{\text{mol}\mathrm{}K}\times273.15K} \\ n=0.24mol\text{ SO}_2 \end{gathered}\)Now, for each mole of SO2 that reacts we need 5/2 moles of C, that is 0.24x5/2=0.61 moles of C.
We use mass molar of C to calculate the grams.
Mass molar of C=12.01g/mol
Mass of C= Moles of C x Mass Molar
Mass of C= 0.61 mol x 12.01 g/mol = 7.37 g
So, To fully react 5.5 L of SO2 at STP we will need 7.37 g of C.
c)We apply the gas law again but this time we clear the volume.
We also take into account that for each mole of C, 4 moles of CO are produced, so if we have 20 moles of C we will produce 20x4=80 moles of CO.
\(\begin{gathered} V=\frac{nRT}{P} \\ V=\frac{80mol\times0.08206\frac{atm.L}{mol.K}\times273.15K}{1atm} \\ V=\text{ 1793.18 L} \end{gathered}\)So, from 20.0 moles of C at STP can be produced 1793.18 liters of CO
For the balanced equation shown below, how many moles of N2 will react with the 0.3034 moles of Mg.
3Mg + N2 --> Mg3N2
**i think it needs to be rounded to the tenth
Answers
Answer:
0.1 moles of N2 will react with 0.3034 moles of Mg.
Explanation:
\(\sf{balanced \ eqaution = 3Mg + N2 \rightarrow Mg3N2}\)
0.3034 moles of Mgusing molar ratio:
3Mg : N2
3 : 1
moles of N2:
\(\hookrightarrow \sf\frac{0.3034 }{3} *1\)
\(\hookrightarrow \sf 0.10113 \ moles \ of \ N2\)
Below is a list of standard reduction potentials (E0') for biological half cell reactions.
Succinate + CO2 + 2 H+ + 2 e- --> alpha-ketoglutarate + H2O -0.67 V
Oxaloacetate + 2 H+ + 2 e- --> malate -0.17 V
Fumarate + 2 H+ + 2 e- --> succinate -0.03 V
Using the above information, answer the following questions:
(A) Which metabolite would spontaneously reduce oxaloacetate (OAA)?
(B) Based on your answer for (A), write the two half cell reactions and the resulting balanced reaction for the reduction of OAA.
(C) Calculate the standard reduction potential for the reaction chosen in (B)
Answers
A reaction to be spontaneous,overall cell potential must be positive.
(A)The metabolite which would spontaneously reduce oxaloacetate (OAA) is:
alpha-ketoglutarate
(B)The two half cell reactions are as follows:
Reduction half reaction:
Oxaloacetate + 2 H+ + 2 e- --> malate
Oxidation half reaction:
alpha-ketoglutarate --> Succinate + CO2 + 2 H+ + 2 e-
Overall resulting balanced reaction for the reduction of OAA :
Oxaloacetate +alpha-ketoglutarate --> malate + Succinate + CO2
(C)the standard reduction potential for the reaction chosen in (B):
+0.67-0.17 = +0.50 V
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Do you think personality
traits are primarily inherited
from your parents or
influenced by the
environment? What is your
evidence you researched?
Answers
Personality traits are influenced by a combination of genetic and environmental factors. Research suggests that both genetics and the environment play significant roles in shaping an individual's personality.
Studies on twins and adoption give proof that genetics affect personality. When opposed to fraternal twins, who only share 50% of their genetic makeup, identical twins, who share 100% of their genetic material, frequently show stronger similarities in personality traits. This shows that certain personality traits are influenced by hereditary factors.
Yet, environmental influences also have a considerable impact on personality. Despite having comparable DNA, studies on non-twin siblings reared in the same home have found that they frequently display personality differences.
This shows that the environment, including parental practices, cultural influences, and life events, has a significant impact on personality development.
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A temperature increase causes the particles to what ??!