Answer:
0.01981 gallons.
Explanation:
In this problem, we need to convert 75 mL of water to gallons.
We know that, 1 gallon = 3785.41 mL
To convert 75 mL to gallons, we must use to the unitary method such that,
1 mL = (1/3785.41) gallon
So,
\(75\ mL=75\times \dfrac{1}{3785.41}\\\\=0.01981\ \text{gallons}\)
So, there are 0.01981 gallons in 75 mL of water.
This graph shows a plot of the rate of reaction versus the concentration of the reactant. What is the order of the reaction with respect to A?
Group of answer choices
2
1
1/2
0
Since the rate of reaction changes linearly with the change in the concentration of A, the reaction if first order with respect to A. Option B
What is the order of reaction?
The mathematical link between the concentration of the reactants and the rate of the reaction is referred to as the order of a reaction.
The rate of a first-order reaction is inversely related to the concentration of one component. Typically, the rate equation for a first-order reaction takes the following form: rate = k[A], where [A] denotes the reactant concentration and k denotes the rate constant. As the reactant concentration rises, the reaction rate rises linearly as well.
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CAN SOMEONE HELP WITH THIS QUESTION?✨
What would happen to your results if not all of the ammonium chloride was sublimated when it was being heated in step 4 of the procedure How would this affect the calculated percent of each of the three components of the mixture?
1- Ammonium Chloride
2- Sand
3-Sodium chloride
The sublimation is not percent yield of the filtrate does not similar to the calculated one for all these components. The detachment will not be complete if all the ammonium chloride is sublimed.
What do you mean by sublimation ?Sublimation is the type of physical change of solids to alter them directly to gaseous state. It needs much energy to direct the transition of solid to gas. Heating the solid substance at higher temperature will sublime the solid.
The mixture and sand, sodium chloride and ammonium chloride can be distinguished by heating the mixture to sublime the ammonium chloride. The leftover mixture of salt and sand is interacted in water. From which sand can be separated.
Thus,The incomplete separation of sand and NaCl. Percent yield of each will be reduced.
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the atomic mass ratio of helium to hydrogen, 4:1, is what led scientists to propose the existence of another subatomic particle in the nucleus. if protons were the only subatomic particles in the nucleus, the mass ratio of helium to hydrogen would be .\
Scientists hypothesized the existence of another subatomic particle in the nucleus because helium has an atomic mass ratio of 4:1 to hydrogen. Helium and hydrogen have a mass ratio of 2:1 if protons were the only subatomic particles in the nucleus.
Rutherford's well-known gold foil experiment helped him discover protons in 1909. He bombarded a paper-thin piece of gold with alpha particles. Alpha particles, which have a positive charge, struck a piece of gold foil. Alpha particles mostly passed through unharmed. This demonstrated that the gold atoms contained largely void space. All atoms include minuscule, negatively charged subatomic particles or electrons, as demonstrated by J.J. Thomson's cathode ray tube studies. Thomson proposed the plum pudding model of the atom, which had positively-charged "soup" and negatively-charged electrons inside. The gold foil test was the most well-known experiment conducted by Ernest Rutherford. A beam of alpha particles was aiming at the gold foil. Although some alpha particles were scattered backward, the majority of them pierced the foil. This demonstrated that the vast majority of an atom is composed of void space that encircles a tiny nucleus.
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What is the molar concentration of Zn2+ ions in a solution, if the electrode potential value is 59mV less than the standard electrode potential value at 298 K?
Molar concentration of Zn2+ions in a solution is 3.481 mol/lit
The electrode potential value is 59mV
Temperature=298k
What is electrode potential?
It is a force of galvanic cell. basically it is the difference between an electrolyte and electrode.equation formed- Zn → Zn2+ + 2e
from Nernst equation-
E=E cell - 0.059 log [Zn2+]
[zn2+]=3.481 mol/lit
hence, Molar concentration of Zn2+ions in a solution is 3.481 mol/lit
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I need help calculating the error % in molar mass
How many meters is 32 kilometers?
A.
3.2 × 10-5 meters
B.
3.2 × 10-4 meters
C.
3.2 × 103 meters
D.
3.2 × 104 meters
E.
3.2 × 105 meters
Answer:
B
Explanation:
3.2 × 10⁴
= 3.2 × 10000
= 32000 m
Which of the following would be considered renewable resources? You may choose more than one.
oil
corn
clean air
forests
Answer:
clean air
Explanation:
Calculate the volume in litres (L) of 1.41 mol of gas at 68.0 kPa and 27.00 °C (gas constant R = 8.314 J mol K-.).
1. 664 L
2. 0.384L
3. 51.7L
4. 4.66L
5. 0.511L
Answer:
3.) 51.7 L
Explanation:
To find the volume, you need to use the Ideal Gas Law:
PV = nRT
In the equation,
-----> P = pressure (kPa)
-----> V = volume (L)
-----> n = moles
-----> R = Ideal Gas constant (8.314 kPa*L/mol*K)
-----> T = temperature (K)
First, you need to convert the temperature from Celsius to Kelvin. Then, you can plug the given values into the equation and simplify to find "V".
P = 68.0 kPa R = 8.314 kPa*L/mol*K
V = ? L T = 27.00 °C + 273 = 300 K
n = 1.41 moles
PV = nRT <----- Ideal Gas Law
(68.0 kPa)V = (1.41 moles)(8.314 kPa*L/mol*K)(300 K) <----- Insert values
(68.0 kPa)V = 3516.822 <----- Multiply right side
V = 51.7 <----- Divide both sides by 68.0
Finish the attachment pleaseee it's due I will give extra points and brainly too
Answer:
the first orbit contains a maximum of 2 electron
The second orbit contains a maximum of 8
what is the element found in all living matter.
Answer:
There are four elements that are found in all living animals, that are:
Oxygen (O)
Carbon (C)
Hydrogen (H)
Nitrogen (N).
How many electrons are in an atom of elemental sodium?
equal to the number of neutrons
equal to the number of protons
equal to the number of protons and neutrons
Answer:
its the second option
equal to the number of protons
Explanation:
took the test
Answer:
equal to the number of protons
Explanation:
2021 edge
10 grams of sugar is dissolved in 100 grams of water forming a solution, sugar is the ______?
solute
While sugar can dissolve in water so that sugar is a solute.
solutionThe definition of a solution is a homogeneous mixture of two or more substances. Well, a solution consists of a solute and a solvent which are homogeneous in nature.
- Solvent: a substance that dissolves another substance.
- Solute: the substance that is dissolved in the solvent.
Generally, the amount of solvent will be more than the solute. This is so that the solutes can be mixed homogeneously. The meaning of homogeneous means that which dissolves perfectly. For example salt dissolved in water. As a result, the salt will melt and become homogeneous with water.
While sugar can dissolve in water so that sugar is a solute.
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10 grams of sugar is dissolved in 100 grams of water forming a solution, sugar is the solute.
A solute is a substance that is dissolved in a solvent to create a solution. In other words, it is the component of a solution that is present in a lesser amount than the solvent.
For example, in a solution of salt water, the salt is the solute and the water is the solvent. The solute is typically a solid, liquid, or gas and can be a single substance or a mixture of substances.
The solute and solvent interact to form a homogeneous mixture, meaning that the solute is evenly distributed throughout the solvent.
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How many calcium atoms will you need to balance this: Ca(PO4)
Answer: 2
Explanation: Calcium has a +2 charge and PO4 has a -1 charge. When writing this expression, the charges are flipped; instead of Ca2(PO4), it's Ca(PO4)2.
How do I balance coefficient equations
Answer:
In order to balance the chemical equation, you need to make sure the number of atoms of each element on the reactant side is equal to the number of atoms of each element on the product side. In order make both sides equal, you will need to multiply the number of atoms in each element until both sides are equal.
Answer: When you balance a chemical equation, you change coefficients. You never change subscripts. A coefficient is a whole number multiplier. To balance a chemical equation, you add these whole number multipliers (coefficients) to make sure that there are the same number of atoms on each side of the arrow.
Explanation:
Which of the following statements about combination reactions is not true?
A magnesium reacts with oxygen to form magnesium oxide
B the reaction of nonmetals with each other forms a molecular compound
C a combination reaction is also called a retrosynthesis
D sodium and chlorine react to form a compound
Statement C is not true. A combination reaction is not called retrosynthesis.
Retrosynthesis is a term used in organic chemistry to describe the process of planning the synthesis of a complex molecule by breaking it down into simpler precursor compounds. On the other hand, a combination reaction refers to a chemical reaction where two or more substances combine to form a single compound.
Examples of combination reactions include the reactions mentioned in statements A and D, where magnesium reacts with oxygen to form magnesium oxide and sodium reacts with chlorine to form sodium chloride, respectively.
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Photoelectric effect will occur only if frequency of light striking an electron in a metal is above a certain threshold frequenci
The statement is correct. The photoelectric effect refers to the phenomenon where electrons are ejected from the surface of a material when it is exposed to light. The frequency of light striking an electron in a metal must be above the threshold frequency in order for the photoelectric effect to occur.
The statement is correct. The photoelectric effect refers to the phenomenon where electrons are ejected from the surface of a material when it is exposed to light. However, for the photoelectric effect to occur, the frequency of the incident light must be above a certain threshold frequency.
The threshold frequency is the minimum frequency of light required to dislodge electrons from the material. Below this threshold frequency, regardless of the intensity or duration of the light, no electrons will be emitted.
This behavior can be explained by the particle-like nature of light, where light is composed of discrete packets of energy called photons. The energy of a photon is directly proportional to its frequency. Only photons with energy greater than or equal to the binding energy of the electrons in the material can dislodge them.
Therefore, the frequency of light striking an electron in a metal must be above the threshold frequency in order for the photoelectric effect to occur.
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A stock solution of HNO3 is prepared and found to contain 14.2 M of HNO3. If 25.0 mL of the stock solution is diluted to a final volume of 0.500 L, the concentration of the diluted solution is ________ M.
Answer:
First convert volume given into same unit.
Therefore 1000 mL =1L
1000mL=1L
25.0mL=?
(25.0×1)÷1000=0.025L
but using the equation;M1×V1=M2×V2
M1=14.2M
V1=0.025L
M2=?
V2=0.5L
Therefore;. 14.2×0.025=M2×0.5
M2=(14.2×0.025)÷0.5
M2=0.71M.
A stock solution of HNO3 is prepared and found to contain 14.2 M of HNO3. If 25.0 mL of the stock solution is diluted to a final volume of 0.500 L, the concentration of the diluted solution is 0.71M.
What is the stock solution ?To make a stock solution, weigh out the proper amount of a pure solid or measure out the proper amount of a pure liquid, put it in the right flask, and then dilute it to the desired volume. Depending on the intended concentration unit, many methods can be used to measure the reagent.
First we convert volume
Then 1000 mL = 1L
1000mL= 1L
25.0mL = ?
( 25.0 × 1 ) / 1000
= 0.025L
by using the equation;
M1 × V1 = M2 × V2
M1 = 14.2M
V1 = 0.025L
M2 = ?
V2 = 0.5L
14.2 × 0.025 = M2 × 0.5
M2 = (14.2 × 0.025 ) ÷ 0.5
M2 = 0.71M.
Thus, A stock solution of HNO3 is prepared and found to contain 14.2 M of HNO3. If 25.0 mL of the stock solution is diluted to a final volume of 0.500 L, the concentration of the diluted solution is 0.71M.
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a. Using the Born-Mayer Equation, calculate the lattice enthalpy for sphalerite
(zinc blende), ZnS. You must look up the appropriate parameters for the equation.
b. Using the Born-Mayer Equation, calculate the lattice enthalpy for wurtzite, ZnS. You must
look up the appropriate parameters for the equation.
c. Which is thermodynamically stable at ambient conditions (25 °C, 1 bar)? Find a reference
with the T and P phase diagram for ZnS. Submit the pdf of the reference with your file . Also,
compare your answer to the standard enthalpies of formation for wurtzite compared to sphalerite.
ΔLatticeU = ΔLatticeH – pΔVm is the lattice energy of wurtzite. Ionic compounds often have flat surfaces that meet at distinctive angles and are stiff, brittle, crystalline materials.
Remember that when a metal reacts with a nonmetal, often an ionic compound results from the transfer of electrons form the metal (the reductant) towards the nonmetal (the oxidant). Ionic compounds often have flat surfaces that meet at distinctive angles and are stiff, brittle, crystalline materials. They melt at rather high temperatures and are not easily distorted. ΔLatticeU = ΔLatticeH – pΔVm is the lattice energy of wurtzite.
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Rust has the same properties as iron
True
False
Answer:
false
Explanation:
CuBr2 percent composition
The percent composition of CuBr₂ is approximately 28.46% of Cu and 71.54% of Br.
To determine the percent composition of CuBr₂ (copper(II) bromide), we need to calculate the mass of each element in the compound and then divide it by the molar mass of the entire compound.
The molar mass of CuBr₂ can be calculated by adding up the atomic masses of copper (Cu) and bromine (Br) in the compound. The atomic masses of Cu and Br are approximately 63.55 g/mol and 79.90 g/mol, respectively.
Molar mass of CuBr₂ = (63.55 g/mol) + 2(79.90 g/mol) = 223.35 g/mol
Now, let's calculate the percent composition of each element in CuBr₂:
Percent composition of copper (Cu):
Mass of Cu = (63.55 g/mol) / 223.35 g/mol × 100% ≈ 28.46%
Percent composition of bromine (Br):
Mass of Br = 2(79.90 g/mol) / 223.35 g/mol × 100% ≈ 71.54%
Therefore, the percent composition of CuBr₂ is approximately:
- Copper (Cu): 28.46%
- Bromine (Br): 71.54%
These values represent the relative mass percentages of copper and bromine in the compound CuBr₂.
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c) Discuss precision and Accuracy as they relate to types of errors.
what is the answer
Precision relates to the consistency and reproducibility of measurements, while accuracy reflects how close measurements are to the true value.
Precision and accuracy are two important concepts in the context of errors in measurements. While they both pertain to the quality of data, they refer to different aspects.
Precision refers to the degree of consistency or reproducibility in a series of measurements. It reflects the scatter or spread of data points around the average value. If the measurements have low scatter and are tightly clustered, they are considered precise. On the other hand, if the measurements have a high scatter and are widely dispersed, they are considered imprecise.
Accuracy, on the other hand, refers to the closeness of measurements to the true or target value. It represents how well the measured values align with the actual value. Accuracy is achieved when measurements have a small systematic or constant error, which is the difference between the average measured value and the true value.
Errors in measurements can be classified into two types: random errors and systematic errors.
Random errors are associated with the inherent limitations of measurement instruments or fluctuations in the measurement process. They lead to imprecise data and affect the precision of measurements. Random errors can be reduced by repeating measurements and calculating the average to minimize the effect of individual errors.
Systematic errors, on the other hand, are caused by consistent biases or inaccuracies in the measurement process. They affect the accuracy of measurements and lead to a deviation from the true value. Systematic errors can arise from factors such as instrumental calibration issues, environmental conditions, or experimental techniques. These errors need to be identified and minimized to improve the accuracy of measurements.
In summary, precision refers to the degree of consistency or reproducibility of measurements, while accuracy refers to the closeness of measurements to the true value. Random errors affect precision, while systematic errors affect accuracy. To ensure high-quality measurements, both precision and accuracy need to be considered and appropriate techniques should be employed to minimize errors.
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the percentage of silver in a solid sample is determined gravimetrically by converting the silver to ag (aq) and precipitating it as silver chloride. failure to do which of the following could cause errors in the analysis?
As having simply the mass of both the Silver Chloride potentially result in inaccuracies in the analysis, you should account for the mass of something like the measuring cylinder to subtract it from the final mass.
The mass is what?A substance or item's mass serves as a proxy for the composition of the substance or object. The basic SI unit of mass is just the kilogram (kg), although smaller quantities could also be calculated throughout grams (g). To measure mass, someone would require a balance.
What is the mass unit?Matter is really the unit of weight used to describe mass, specifically mass in kilograms. The mass of a bird does not change. Whatever you weigh always weights 15 grams, whether you weigh it on Earth, the Moon, or Mars.
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Which of the following equations represents an acid-base reaction?
Choose 1 answer:
The equations represent an acid-base reaction is Ca ( OH )₂ + 2HBr ⇒ CaBr₂ + 2H₂O . Therefore, option D is correct.
What is acid base reaction ?The acid-base reaction (neutralization reaction) A salt and water are created when an acid and a base interact and neutralize one another. neutralization. a reaction between an acid and a base that results in a solution that isn't as basic or acidic as the initial solutions.
Salts and water are always present in most acid-base interactions. For instance, sodium hydroxide (NaOH) and hydrochloric acid (HCl) react to produce sodium chloride (NaCl) salt and water (H2O).
A neutralizing reaction occurs when an acid and a base interact. This reaction yields a salt and water as byproducts.
Thus, option D is correct.
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What is the energy change when a 777.1 g sample of water has
an initial temperature of 57.3 °C and a final temperature of
42.6 °C
Answer:
-47749.69 joule energy release.
Explanation:
Given data:
Mass of water = 777.1 g
Initial temperature = 57.3°C
Final temperature = 42.6 °C
Energy change = ?
Solution:
Specific heat capacity of water is 4.18 J/g.°C
Q = m.c. ΔT
Q = amount of heat absorbed or released
m = mass of given substance
c = specific heat capacity of substance
ΔT = change in temperature
ΔT = 42.6 °C - 57.3°C
ΔT = -14.7°C
Q = 777.1 g × 4.18J/g.°C × -14.7°C
Q = -47749.69 J
-47749.69 joule energy release.
Question (1 point)
Given the model, answer the following questions regarding effusion. The orange spheres have a greater root-mean-square speed than the blue spheres. Assume the balloon has a tiny opening for gas molecules to escape.
1st attempt
Part 1 ( 0.5 point)
See Periodic Table See Hint
Which balloon, A or B, most accurately illustrates the effusion of a gas from the central balloon?
Calculate the relative rate of effusion for the orange to blue spheres. The root-mean-square speed for the orange spheres is 495.0m/s. The root-meah-5quare speed for the blue spheres is 380.0m/ s.
According to the claim, Balloon A, which has more blue and less orange, exhibits accurate effusion at a relative effusion rate of 1.303. (orange is 1.303 times more effused than blue).Relative rate of effusion for the orange to blue spheres = 1.531.
What is effusion ?The process of effusion is when a gas escapes from a container through a hole that is significantly smaller in diameter than the molecules' mean free path.
Gas molecules flow through a small opening in one container and into another by effusion. Graham's law allows rates of effusion to be compared at the same temperature. Diffusion is the random molecular motion-based movement of gas molecules through one or more other types of gas.
Rate of effusion of Orange / Rate of effusion of blue
= [Mblue / Morange]^1/2
Vrms = sqrt [(3RT/M)]
Vorange / Vblue = [ Mblue / Morange]^1/2
Rate of effusion of Orange / Rate of effusion of blue
= 565/ 369
= 1.531
Thus, Balloon A, which has more blue and less orange, exhibits accurate effusion at a relative effusion rate of 1.303.
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Concentrated sufuric acid has a concentration of 18.4 M. 1 mL of concentrated sulfuric acid is added to 99 mL of a solution containing 0.505M*H_{2}*S and 0.505 M HS what is the resulting pH of that solution?
The resulting pH of the solution is 1.74(approx).
To solve this problem, we need to use the concept of acid-base equilibrium and the pH scale. The addition of sulfuric acid will increase the concentration of H+ ions in the solution, which will shift the equilibrium of the \(H_2S\)/HS- system. We can use the following equation to calculate the pH of the resulting solution:
Ka = [H+][HS-]/\(H_2S\)]
where Ka is the acid dissociation constant for \(H_2S\), [\(H_2S\)], [HS-], and [H+] are the concentrations of the \(H_2S\), HS-, and H+ ions, respectively.
First, we need to calculate the initial concentrations of\(H_2S\) and HS- in the solution:
[\(H_2S\)] = 0.505 M
[HS-] = 0.505 M
Next, we need to calculate the amount of H+ ions added to the solution by 1 mL of concentrated sulfuric acid. To do this, we can use the following equation:
[H+] = (n/V) = (18.4 mol/L) x (1x\(10^{-3}\) L) = 1.84 x\(10^{-2}\)mol
where n is the amount of sulfuric acid added in moles, V is the volume of the solution in liters, and 18.4 mol/L is the concentration of the sulfuric acid.
Now, we can calculate the new concentrations of \(H_2S\), HS-, and H+ ions in the solution:
[\(H_2S\)] = [\(H_2S\)]0 - [H+] = 0.505 - 1.84x\(10^{-2}\)= 0.486 M
[HS-] = [HS-]0 + [H+] = 0.505 + 1.84x\(10^{-2}\) = 0.524 M
[H+] = 1.84 x \(10^{-2}\)M
Finally, we can use the equation for Ka to calculate the pH of the resulting solution:
Ka = 1.1 x \(10^{-7}\)
[H+] x [HS-]/[\(H_2S\)] = Ka
pH = -log[H+]
Substituting the values, we get:
(1.84 x \(10^{-2}\)) x (0.524)/(0.486) = 1.98 x \(10^{-2}\)
pH = -log(1.98 x \(10^{-2}\)) = 1.74(approx)
Therefore, the resulting pH of the solution is 1.74(approx)
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2 ,3 - dimethyl - 4 - fluoro hexane
please I need the structural
Answer: There will be a methyl group on carbons 2 and 3, and a fluorine on carbon 4.
Explanation:
hi how do i do d (ii)? thanks!
A solution with nitrate(V) ion concentrations over 0.05 mg/cm3 has a molarity of around 1.61 x 10-5 mol/L.
We must first convert the amount of nitrate(V) ions in drinking water to moles per litre since the threshold concentration over which "Blue-Baby" Syndrome might manifest is 0.05 mg/cm3.
It is necessary to know the molar mass of nitrate(V) ions in order to convert from mg/cm3 to moles per litre (NO3-).
The formula below can be used to determine NO3-'s molar mass:
N: 14.01 g/mol for the atomic mass
O: 16.00 g/mol is the atomic mass (3 oxygen atoms in NO3-)
NO3-'s total molar mass is equal to 14.01 + 16.00 x 3 = 62.01 g/mol.
Let's now translate the specified concentration from mg/cm3 to moles/liter (M).
As 1 g = 1000 mg, 1 mg/cm3 is 0.001 g/cm3.
1 cm3 = 0.001 g/mL multiplied by 0.001 g/cm3
1 L/1000 mL x 0.001 g/mL = 0.001 g/L
We must change the grams into moles using the molar mass in order to get the molarity:
1.61 × 10-5 mol/L = 0.001 g/L / 62.01 g/mol
As a result, a solution with nitrate(V) ion concentrations over 0.05 mg/cm3 has a molarity of around 1.61 x 10-5 mol/L.
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CAN SOMEONE HELP WITH THIS QUESTION?
If the weight of Magnesium Metal is 0.6 g
1- FIND MOLES OF magnesium METAL
2- FIND CHANGE IN T CALORIMETER
3- Find q calorimeter
4- Find q reaction
5- Find the change in heat reaction per mole of Mg consumed
1- FIND MOLES OF magnesium METAL
Moles of Magnesium Metal = 0.6 g/24.31 g/mol = 0.0246 mol
What is Magnesium?Magnesium is a silvery-white alkaline earth metal that is a very abundant element in the Earth's crust. It is the eighth most abundant element in the universe.
2- FIND CHANGE IN T CALORIMETER
The change in temperature of the calorimeter is not given, so it cannot be calculated.
3- Find q calorimeter
The heat absorbed or released by the calorimeter is qcalorimeter = mCΔT, where m is the mass of the calorimeter, C is the specific heat capacity of the calorimeter, and ΔT is the change in temperature of the calorimeter. Since the mass and change in temperature of the calorimeter are not given, qcalorimeter cannot be calculated.
4- Find q reaction
The heat absorbed or released by the reaction is qreaction = nCΔT, where n is the number of moles of the reactant, C is the specific heat capacity of the reaction, and ΔT is the change in temperature of the reaction. Since the number of moles of the reactant and change in temperature of the reaction are not given, qreaction cannot be calculated.
5- Find the change in heat reaction per mole of Mg consumed
The change in heat per mole of Mg consumed is qMg = qreaction/n, where qreaction is the heat absorbed or released by the reaction and n is the number of moles of Mg. Since qreaction and n are not given, qMg cannot be calculated.
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(a) 0.50 mol of NaCl dissolved in 0.30 L of solution
Answer:
Explanation:
To find the concentration of a solution, we need to divide the number of moles of solute by the volume of the solution in liters.
In this case, we have 0.50 mol of NaCl dissolved in 0.30 L of solution. Therefore, the concentration of the solution can be calculated as:
Concentration = moles of solute / volume of solution
Concentration = 0.50 mol / 0.30 L
Concentration = 1.67 mol/L
Therefore, the concentration of the solution is 1.67 mol/L.