Answers
To answer this question we have to solve the given equation for F, to do it we can use different algebraic operations to isolate F to one side of the equation:
\(\begin{gathered} C=\frac{F-32}{1.8} \\ 1.8\cdot C=1.8\cdot\frac{F-32}{1.8} \\ 1.8C+32=F-32+32 \\ F=1.8C+32 \end{gathered}\)The answer is:
\(F=1.8C+32\)Related Questions
True or false Gases have no weigh
Answers
False
They are light indeed... but they do have mass
Hope this helped you- have a good day bro cya)
A sample of a gas has a volume of 1.5L at 150K. If the gas is heated to 235K at constant pressure, what will its final volume be
Answers
Answer:
2.35 L
Explanation:
From Charles Law
Applying,
V/T = V'/T'................. Equation 1
Where V = Initial volume of the gas, V' = Final volume of the gas, T = Initial Temperature of the gas, T' = Final temperature of the gas.
Make V' the subject of the equation
V' = VT'/T............... Equation 2
From the question,
Given: V = 1.5 L, T = 150 K, T' = 235 K,
Substitute these values into equation 2
V' = (1.5×235)/150
V' = 2.35 L
Hence the final volume of the gas is 2.35 L
Which compound has a functional group that contains two oxygen atoms?
Answers
The compound that has a functional group containing two oxygen atoms is peroxide. In addition to peroxides, there are other compounds that contain functional groups with two oxygen atoms. These include carboxylic acids and esters.
Peroxide compounds, such as hydrogen peroxide (H₂O₂) or organic peroxides, have a functional group (-O-O-) where two oxygen atoms are bonded together. This group is responsible for the characteristic properties and reactivity of peroxides.
Carboxylic acids: Carboxylic acids have the functional group -COOH, which consists of a carbonyl group (C=O) and a hydroxyl group (-OH) bonded to the same carbon atom. While carboxylic acids have one oxygen atom from the carbonyl group, the hydroxyl group provides the second oxygen atom.
Esters: Esters have the functional group -COO-, which consists of a carbonyl group (C=O) and an oxygen atom (-O-) bonded to the same carbon atom. This arrangement gives esters two oxygen atoms within their functional group.
Hence, the compounds with functional groups containing two oxygen atoms include peroxides, carboxylic acids, and esters.
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you have a sample containing 4.5g of an unknown gas. Based on the volume, temperature, and pressure of the sample, there are 0.14 moles of gas present. What is the molar mass (g/mol) of the unknown gas? please explain step by step
Answers
The molar mass of the gas is obtained as 32.1 g/mol.
What is the molar mass?The molar mass has to do with the mass one mole of a substance. We know that according to the question, we can be able to obtain the number of moles of the compound from the ideal gas equation.
This is how we are able to get the number of moles of the gas as 0.14 moles. Now we need to use the information that we have to get the molar mass of the gass.
Number of moles = mass/ molar mass
Molar mass = mass/Number of moles
Molar mass = 4.5g/0.14 moles
= 32.1 g/mol
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Generally, systems move spontaneously in the direction of increasing entropy. TRUE FALSE
Answers
Answer:
true
Explanation:
Help please! I'll give brainliest as well if you show work/explain :)
Answers
Answer:
see below
Explanation:
A. The given reaction releases energy, indicating that it is an exothermic reaction.
B. The △H value for the reaction can be written as △H = -571.7 kJ, with a negative sign indicating the energy is released.
C. The balanced equation for the reaction between hydrogen and oxygen to form water is:
2H2(g) + O2(g) → 2H2O(l)
D. To calculate the amount of energy released when 10.0g of hydrogen is reacted with an excess of oxygen, we need to first determine the amount of hydrogen involved in the reaction.
The molar mass of hydrogen is 1.008 g/mol, so 10.0 g of hydrogen is equivalent to 10.0 g / 1.008 g/mol = 9.92 mol of hydrogen.
From the balanced equation, we can see that 2 mol of hydrogen is required for every 1 mol of oxygen, so the amount of oxygen involved in the reaction is twice the amount of hydrogen.
Therefore, the amount of oxygen needed for 9.92 mol of hydrogen is 2 × 9.92 mol = 19.84 mol.
Assuming that there is an excess of oxygen, all of the hydrogen will react, so the limiting reactant is oxygen.
Using the △H value of -571.7 kJ, we can calculate the amount of energy released as follows:
-571.7 kJ / 2 mol H2 = -285.9 kJ/mol H2
So the energy released when 10.0 g of hydrogen reacts with an excess of oxygen is:
-285.9 kJ/mol H2 × 9.92 mol H2 = -2836.53 kJ
Therefore, the reaction releases 2836.53 kJ of energy when 10.0 g of hydrogen reacts with an excess of oxygen.
An astronomer observes an asteroid in the solar system. He notes that the asteroid is three times farther from the Sun than Earth is.
How far away from the Sun is the asteroid in astronomical units?
1 AU
2 AU
3 AU
4 AU
helpppppppp
Answers
Answer:
3 AU
Explanation:
The distance from the Earth to the Sun is known as 1 AU, or 1 Astronomical Unit. If an asteroid is three times this distance, it is 3 AU away.
If 27.37ml of 0.2115M NaOH is able to neutralize 37.45 of HCl, what is the concentration of the acid?
Answers
You just gotta match the moles:
moles of NaOH = 0.02737 L * 0.2115 M = 0.005789 mol of NaOH. The amount of moles of HCl it can neutralize should be the same since they are in a 1:1 ratio. Therefore, you can do moles of NaOH divided by 0.003745L to get the answer. It turns out to be 0.1546M.
In an experiment, you were required to calculate the percent yield of the compound. If the beaker weighed 10.20 g and the beaker dried substance weighed 16.54 g, what is the percent yield of the product if you expected to obtain 7.62g of produce
Answers
The percent yield of the product is 83.20% if the beaker weighs 10.20 g, the dry substance in the beaker weighs 16.54 g, and the expected mass is 7.62 g.
The percent yield of the product is given by:
\( \% = \frac{m_{e}}{m_{t}} \times 100 \)
Where:
\( m_{e}\): is the experimental mass
\( m_{t}\): is the theoretical mass = 7.62 g
We can obtain the experimental mass by substrating the mass of the beaker from the mass of the dry substance in the beaker.
\( m_{e} = (16.54 - 10.20) g = 6.34 g \)
Hence, the percent yield is:
\( \% = \frac{6.34}{7.62} \times 100 = 83.20 \% \)
Therefore, the percent yield of the product is 83.20%.
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CO + 2H2 ⇌ CH3OH ΔH <0
The synthesis of CH3OH(g) from CO(g) and H2(g) is represented by the equation above.
Which of the following statements is true about bond energies in this reaction?
a. The energy absorbed as the bonds in the reactants are broken is less than the energy released as the bonds in the product are formed.
b. The energy released as the bonds in the reactants are broken is less than the energy absorbed as the bonds in the product are formed.
c. The energy released as the bonds in the reactants are broken is greater than the energy absorbed as the bonds in the product are formed.
d. The energy absorbed as the bonds in the reactants are broken is greater than the energy released as the bonds in the product are formed.
Answers
Answer:
C. The energy released as the bonds in the reactants are broken is greater than the energy absorbed as the bonds in the product are formed.
Explanation:
CO + 2H₂ ⇌ CH₃OH ΔH <0As ΔH is negative, the given reaction is exothermic.
That means that the enthalpy of the product is less than the enthalpy of the reactants. In other words, part of the energy from the reactants is used to form new bonds (between C and H, for example), while the other part is transfered outside the system as heat.
Thus the correct answer is C.
Dr. Wong's assistant made the observations below while heating a sample of solid hydrogen. Using the data and observations in the table below, create a heating curve for hydrogen that Dr. Wong can reference during his laboratory testing. Be sure to include and label the following items in your heating curve:
Create temperature and time intervals that are appropriate for the data.
Don't start the temperature on the graph at 0 °C because the time intervals will be too large for the hydrogen data.
Label the melting and boiling points on the curve.
Label the three states and the two transition phases on the curve.
Heating data:
Time (Minutes) Observations
0:00–2:43 Hydrogen is a solid at −263 °C. Heat is added to sample.
2:43–6:15 Hydrogen begins to change into a liquid at −259 °C.
6:15–10:36 Temperature of the liquid begins to increase.
10:36–14:01 Hydrogen begins to form a gas at −253 °C.
14:01–18:00 Temperature of the gas begins to increase.
18:00 Final temperature of hydrogen gas is −245 °C.
Answers
Using the given observations the hydrogen heating curve can be constructed as follows:
Temperature (°C) | State of Hydrogen
-263 | Solid-259 | Melting (Solid to Liquid)-253 | Boiling (Liquid to Gas)-245 | GasBy subtracting the start time from the end time for each step, one can calculate the time interval:
Solid: 0:00 – 2:43 (2 minutes 43 seconds)Melting: 2:43 – 6:15 (3 minutes 32 seconds)Liquid heating: 6:15 – 10:36 (4 minutes 21 seconds)Boiling: 10:36 – 14:01 (3 minutes 25 seconds)Gas heating: 14:01 – 18:00 (3 minutes 59 seconds)On the curve, the melting point and boiling point of hydrogen are shown as -259°C and -253°C, respectively. The curve can also be used to represent the three states of matter (solid, liquid, and gas) as well as the two transitional phases (melting and boiling).
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The area of the triangular field is 255m2. Find its base if it 9
Answers
Answer:
b = 56.67 m
Explanation:
It is given that,
Area of the triangular field is 255 m²
We need to find the base of the field if its height is 9 m.
The area of a triangle is given by :
\(A=\dfrac{1}{2}\times b\times h\\\\b=\dfrac{2A}{h}\\\\b=\dfrac{2\times 255}{9}\\\\b=56.67\ m\)
So, the base of a triangle is 56.67 m.
A certain metal M forms a soluble sulfate salt M2SO4. Suppose the left half cell of a galvanic cell apparatus is filled with a 50.0 mM solution of M2SO4 and the right half cell with a 5.00 M solution of the same substance. Electrodes made of M are dipped into both solutions and a voltmeter is connected between them The temperature of the apparatus is held constant at 20.0 °C.
Which electrode will be positive?
What voltage will the voltmeter show?
Answers
Answer:
Explanation:
For a certain metal M by which the electrodes and the solution M_2SO_4 the cell notation is:
SALT BRIDGE
ANODE ↓ CATHODE
\(M(s)|M_2SO_4_{(aq)} (50.0 \ mM)\Big {|} \Big {|} M_2SO_4_{(aq)} (5.00 \ M ) |M(s)\)
Since the standard electrode potential is less positive on the left side, a negative anode electrode is used, and oxidation occurs at the anode.
\(i.e \ \ M(s) \to M^{2+} _{(aq)} + 2 e^- \ \ \ (oxidation)\)
The right side of the cell cathode is placed which is positive in sign and aids in reduction since the normal reduction potential is less negative.
\(i.e \ \ M^{2+} _{(aq)} + 2 e^- \to M(s) \ \ \ (reduction)\)
As a result, the correct answer for the positive electrode is the right side.
\(M_2SO_4 \to M^{2+} + SO_4^{2-}\)
Using Nernst Equation:
\(E_{cell} = - \dfrac{RT}{nF }log ( \dfrac{reduction \ half }{oxidation \ half})\)
\(E_{cell} = - \dfrac{2.303 \times 8.314 \times 293}{2 \times 96485 }log ( \dfrac{5.0 0 }{50 \times 10^{-3}})\)
\(E_{cell} = -0.058 \ V\)
the table below gives the atomic number of elements w x and y and z.The the letters do not represent the actual symbols of the elements .
W. X Y. Z
9. 10. 11. 12
which one of the element is less reactive explain .
Answers
Element w is less reactive than elements x, y, and z. The element with the lower atomic number is typically less reactive.
Element w has an atomic number of 9, element x has an atomic number of 10, element y has an atomic number of 11, and element z has an atomic number of 12. Based on this information, we can conclude that element w is less reactive than elements x, y, and z.
This is because the reactivity of an element is largely determined by the number of valence electrons it has. Valence electrons are the electrons in the outermost shell of an atom that are involved in chemical reactions. Elements with fewer valence electrons are less reactive because they are more stable. Element w has only one valence electron, while elements x, y, and z have two, three, and four valence electrons, respectively.
In general, elements with a full outermost shell of electrons, such as the noble gases, are the least reactive because they are highly stable. Elements that are close to having a full outermost shell, such as element w, are also relatively stable and less reactive. On the other hand, elements with only a few valence electrons, such as the alkali metals, are highly reactive because they are trying to gain or lose electrons in order to achieve a full outermost shell.
Overall, the reactivity of an element is determined by its electronic structure, with elements having fewer valence electrons generally being less reactive than those with more. In the case of the elements w, x, y, and z, we can see that element w has the fewest valence electrons and is therefore the least reactive.
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An actual measurement of a sample is 3.5 m. The measured
value is 2.5 m. What is the percent error in the measurement?
a 27 percent
b 29 percent
C 10 percent
d 40 percent
Answers
Answer: b 29 percent
Explanation:
Answer:
B. 29 percent
Explanation:
hope this helps
What is the molarity of a solution containing 5.035 grams of FeCIe in enough water to make 500 mL of solution?
Answers
The molar mass of FeCl2 is 126.75 g/mol (55.85 g/mol for Fe and 35.45 g/mol for Cl).
Number of moles of FeCl2 = mass of FeCl2 / molar mass of FeCl2
= 5.035 g / 126.75 g/mol
= 0.0397 mol
Now we can calculate the molarity of the solution:
Molarity = moles of solute / liters of solution
Since we have 500 mL of solution, we need to convert it to liters by dividing by 1000:
Liters of solution = 500 mL / 1000 mL/L
= 0.5 L
Now we can calculate the molarity:
Molarity = moles of solute / liters of solution
= 0.0397 mol / 0.5 L
= 0.0794 M
Therefore, the molarity of the solution containing 5.035 grams of FeCl2 in enough water to make 500 mL of solution is 0.0794 M.
7) 734 grams of lithium sulfate are dissolved to make 2500 mL of solution. What is the molarity?
Answers
Step 1
Molarity = moles of solute/volume of the solution (L)
Molarity units are mol/L or M
----------------
Step 2
Information provided:
Solute = lithium sulfate = Li2SO4 (the molar mass = 110 g/mol approx.)
Mass of Li2SO4 = 734 g
Volume of solution = 2500 mL = 2.500 L
(1 L = 1000 mL)
----------------
Step 3
Moles Li2SO4 = mass Li2SO4/molar mass Li2SO4 = 734 g/110 g/mol = 6.67 moles Li2SO4
----------------
Step 4
Molarity = 6.67 moles/2.500 L = 2.67 mol/L or 2.67 M
Answer: Molarity = 2.67 mol/L
Although soluble barium compounds are toxic, suspensions of insoluble barium sul- fate are routinely swallowed for upper gas- trointestinal X-ray studies. Why is barium carbonate not used?
1.All carbonates are toxic, whether soluble or not.
2.Barium carbonate is too expensive.
3.Barium carbonate is soluble in plain wa-
ter.
4. Stomachs contain HCl and all carbonates dissolve in acid.
Answers
Answer:
The correct answer is 4. Stomachs contain HCl and all carbonates dissolve in acid. Barium sulfate is insoluble and does not dissolve in either water or the acidic environment of the stomach, so it provides an opaque contrast for X-rays. Barium carbonate, on the other hand, is soluble and would dissolve in the acid environment of the stomach, making it unsuitable for use as a contrast agent for X-ray studies.
Explanation:
what are the properties of acid and that can be distinguish is it explain any two
Answers
Answer:
Acid solutions have pH values lesser than
7
it turn blue litmus paper red
8. A train travels at a at a speed of 30 miles per hour if 1 mile = 1.6 kilometers, how fast is the train traveling in kilometers per minute?
A. 0.8 km/min
B. 1.0 km/min
C. 0,4 km/min
D. 0,6 km/min
Answers
Answer:
Explanation:
A: 0.8 KM/Min
1.6 x 30 = 48
48/60 = 0.8
Which water is most suitable to remove dirt in clothes well
1.Well water
2.River water
3. Sea water
4. Rain water
Answers
Answer:
Explanation:
The second best answer is likely well water. But it is possible that well water can be contaminated as well with soluble minerals.
See water would have salt in it which would make it hard to use.
River water could be containing dirt which would make washing hard to do.
Rain water is likely the best water to use.
10. When dissolved in water, most Group 1 metal salts can be described as
strong electrolytes.
strong acids.
weak electrolytes.
A
B
C
D
non-electrolytes.
(1)
Answers
When dissolved in water, most Group 1 metal salts can be described as strong electrolytes.
When Group 1 metal salts are dissolved in water, they can be described as strong electrolytes. This is because Group 1 metals, such as lithium (Li), sodium (Na), potassium (K), and so on, readily lose their outermost valence electron to form positive ions (cations). These cations then dissociate completely in water, separating from the anions to which they were originally bonded.
The dissociation of Group 1 metal salts in water results in the formation of positively charged metal ions and negatively charged non-metal ions (anions). These ions are free to move and conduct electric current, making the solution a good conductor of electricity. The complete dissociation of Group 1 metal salts in water and the presence of freely moving ions make them strong electrolytes.
Strong electrolytes are substances that ionize completely or almost completely in solution, producing a high concentration of ions. This is in contrast to weak electrolytes, which only partially ionize and produce a lower concentration of ions.
In summary, when Group 1 metal salts are dissolved in water, they form strong electrolytes due to their ability to dissociate completely into ions, leading to a high concentration of freely moving ions in the solution, thus enabling efficient electrical conductivity.
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define a mole of a substancea standard solution of naoh is prepared by dissolving 4 g of the dilute in 250cm3 determine the molarity of the solution
Answers
Answer: The moles of substance present is 0.1 mol and molarity of the solution is 0.4 M.
Explanation:
Given: Mass = 4 g
Volume = 250 \(cm^{3}\) (1 \(cm^{3}\) = 0.001 L) = 0.250 L
Moles is the mass of a substance divided by its molar mass.
So, moles of NaOH (molar mass = 40 g/mol) is calculated as follows.
\(Moles = \frac{mass}{molar mass}\\= \frac{4 g}{40 g/ml}\\= 0.1 mol\)
Molarity is the number of moles of a substance present in liter of a solution.
Hence, molarity of given NaOH solution is as follows.
\(Molarity = \frac{moles}{Volume (in L)}\\= \frac{0.1 mol}{0.250 L}\\= 0.4 M\)
Thus, we can conclude that moles of substance present is 0.1 mol and molarity of the solution is 0.4 M.
Trend of atomic number and atomic size of the elements when we move from left to right in different periods of periodic table
Answers
Answer:
The atomic size decreases with an increase in atomic number when we move from left to right.
Explanation: Hope it helps you:))))))
Have a great day.
A Na2CO3 standard solution is prepared by transferring 2.4817 g of primary
standard-grade sodium carbonate (fw = 106 g/mol) to a 250-ml volumetric flask.
Dissolving the sample in - 100 mL distilled water and diluted to the mark. A 25.0
mL aliquot is taken and titrated with 42.65 mL of HCl, calculate the
concentration of the HCl solution?
Answers
Answer:
0.1098 M
Explanation:
Move the atoms around to show how many of each element in the reactant and product.
Write the coefficients in the boxes across the bottom to write the balanced equation.
Answers
The balanced equation of the reaction is:
CH₄ (g) + 4 Cl₂ (g) ---> CCl₄ (l) + 4 HCl (g)What are balanced equations?Balanced equations are equations in which the moles of atoms on the right-hand side of the equation are equal to the moles of atoms on the left-hand side of the equation.
Balanced equations ensure that the law of the conservation of mass is obeyed such that the mass of reactants is equal to the mass of the products.
In balancing a chemical equation, the following steps are followed:
determine the moles of atoms of each of the elements found on the reactant side as well as the product side of the reactionadd coefficients in front of the formula of the compound or elements reacting to ensure that the moles of atoms are equal on both sides of the reaction.Considering the given reaction:
In the reaction, methane gas reacts with chlorine gas to produce tetrachloromethane and hydrogen chloride gas.
The balanced equation of the reaction is given below as follows:
CH₄ (g) + 4 Cl₂ (g) ---> CCl₄ (l) + 4 HCl (g)
The reaction is a substitution reaction in which chlorine atoms substitute hydrogen atoms in the methane gas molecule.
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PLEASE HELP ASAP I NEED HEP PLEASE ITS DUE TODAY
Answers
(May not be 100% correct as there may be more context, but I hope this helps! Have a nice day!)
We can tell it won't be Claim 1 as Claim 1 compares a reddish-brown substance to a gray/white substance.
I am going to go with Claim 3 is most supported by the evidence because of the three descriptions of the different substances, none of them match.
Aluminum chloride is formed by reacting 13.34g aluminum with 52.82g chlorine. What is the percent composition of the compound?
Answers
[Kr]5s24d25p1
Express your answer as a chemical symbol.
Answers
Answer:
kr(5)s24d25p1
=5d25kprs24
How many moles of HNO₃ will be produced from the reaction of 57.0 g of NO₂ with excess water in the following chemical reaction?
3 NO₂(g) + H₂O (l) → 2 HNO₃(g) + NO(g)
Answers
The number of mole of HNO₃ that will be produced from the reaction of 57.0 g of NO₂ with excess water is 0.826 mole
How do i determine the number of mole of HNO₃ produced?First, we shall obtain the number of mole in 57.0 g of NO₂. This shown below:
Mass of NO₂ = 57 grams Molar mass of NO₂ = 46 g/mol Mole of NO₂ =?Mole = mass / molar mass
Mole of NO₂ = 57 / 46
Mole of NO₂ = 1.239 mole
Finally, we shall determine the number of mole of HNO₃ produced. Details below:
3NO₂(g) + H₂O(l) → 2HNO₃(g) + NO(g)
From the balanced equation above,
3 moles of NO₂ reacted to produce 2 moles of HNO₃
Therefore,
1.239 mole of NO₂ will react to produce = (1.239 × 2) / 3 = 0.826 mole of HNO₃
Thus, we can conclude that the number of mole of HNO₃ produced is 0.826 mole
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