c. What is the heat of reaction for the process described in (a)? Hint: Apply Hess's law using the data in (b)​

The original volume is equal to 248.6 mL.

To find the value of pressure, volume or temperature of a gas after a transformation, one must use the general gas law:

                                                [tex]\frac{P_1 V_1}{T_1} =\frac{P_2 V_2}{T_2}[/tex]

Thus, as the pressure does not change, it is enough to substitute the values ​​in the above formula, such that:

                                               [tex]\frac{V_1}{20}=\frac{373}{30} \\ V_1 = 248.6mL[/tex]

So, the original volume is equal to 248.6 mL.

Learn more about gas law in: brainly.com/question/1190311

Answer:

A molecule

Explanation:

Because that is what I think ^^~

Answer:

182.94 g/mol is the correct

Explanation:

hope this helps

Answer:

Your answer would be:
182.94 g/mol

Explanation:

Have a great rest of your day
#TheWizzer

Answer:

When atoms are formed or broken.

Explanation:

The substances that go into a chemical reaction are called the reactants, and the substances produced at the end of the reaction are known as the products.

Answer:

12.2g

Explanation:

I took the quiz :)

Answer:

B. Decomposition reaction

Explanation:

When silver chloride is kept in the sun, it decomposes to form chlorine gas and silver. As the reaction proceeds, the white coloured silver chloride turns grey because of the formation of silver. Chlorine produced in the reaction escapes into the environment as it is produced in the gaseous state.

2AgCl(s) + light → 2Ag(s) + Cl²(g)

As the above reaction is sensitive to light, they are used in black and white photograph.

Answer:

79

Explanation:

This is the answer I نخل جکڑ disparity disguising

Answer:

The net reaction is Zn(s) + 2H +(aq) → Zn2+(aq) +H 2(g) The Cl− ions are spectators - they don't change. This experiment includes the reaction of zinc with hydrochloric acid.

Answer:

Explanation:

An object is thrown vertically from the ground upwards with a speed of 10 m/s. Considering g = 10 m/s2, the maximum height that the object reaches from the ground, in meters, will be:

a) 15.0.

b) 10.0.

c) 5.0.

d) 1.0.

e) 0.5.

The mass given in the periodic table is a weighted average of all isotopes of an element. For example Hydrogen is normally just one proton so one would expect its atomic mass to be exactly 1, but there are other naturally occurring isotopes of H (deuterium with a mass of 2 and tritium with a mass of 3)  that have more neutrons resulting in a weighted average slightly greater than 1.

The mass of the atoms is given by the number of neutrons and protons. The mass of the atom and the average mass of the element looks a little different due to mass defect.

The mass defect has been the difference in the mass and the average mass of the elemental atom. It has been the energy that binds the neutrons and the protons together in the nucleus. The mass and the average atomic mass differ slightly.

The mass of an individual atom differs from the average atomic mass as average atomic mass is the sum of the masses of the isotope of the elements. Isotopes have little difference in masses due to the number of neutrons. For example mass and average atomic mass of hydrogen differs.

Therefore, the mass and the average atomic mass differ.

Learn more about the mass defects, here:

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Answer:

V2 = 97.7 L

Explanation:

The solve this question, we need to follow the equation below

P1V1 = P2V2

V1 = 59.5L

P1 = 101.3 kPa (because 1 atm equals 101.3 kPa so this one we don't have to do anything) = 1 atm

P2 = 61.7 kPa (must be converted to atm by dividing by 101.3) = 0.609 atm

V2 = ?

P1V1 = P2V2

1 x 59.5 = 0.609 x V2

59.5 = 0.609 x V2

(Dividing both sides by 0.609 to get rid of it)

V2 = 97.7 L

Taking into account the reaction stoichiometry, 17.61 moles of O₂ is required to react with 155 grams of C₃H₈.

In first place, the balanced reaction is:

C₃H₈ + 5 O₂  → 3 CO₂ + 4 H₂O

By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:

The molar mass of the compounds is:

Then, by reaction stoichiometry, the following mass quantities of each compound participate in the reaction:

The following rule of three can be applied: if by reaction stoichiometry 44 grams of C₃H₈ react with 5 moles of O₂, 155 grams of C₃H₈ react with how many moles of O₂?

[tex]moles of O_{2} =\frac{155 grams of C_{3} H_{8}x5 moles of O_{2} }{44 grams of C_{3} H_{8}}[/tex]

moles of O₂= 17.61 moles

Finally, 17.61 moles of O₂ is required to react with 155 grams of C₃H₈.

Learn more about the reaction stoichiometry:

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Answer:

D

Explanation:

They become coefficients in the equilibrium constant expression

They become coefficients in the equilibrium constant expression. Hence, option A is correct.

At equilibrium, the relationship expressed between the amounts of concentration of products and reactants in a reversible chemical reaction is known as the equilibrium constant.

Consider the equation below:

aC + bD <=> eF

Where

C and D are reactants

F is the product

a, b and e are coefficients

Thus the equilibrium constant (K) is written as follows:

K =[tex][F]^e[/tex] / [tex][C]^a[D]^b[/tex]

From the above illustration, we can see that the coefficients are exponent in the equilibrium constant expression.

Thus, we can conclude that the correct answer to the question is Option A. They become exponents in the equilibrium constant expression.

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Answer:

what is the question in this case

The number of atoms in one mole of hydrogen is 6.022 × 10²³. 2 moles of water contains 4 moles of hydrogen  thus, 1.2 × 10²⁴. Hence, the statement is false.

Any substance containing 6.022 × 10²³ number of atoms is called one mole of the substance. This number is called Avogadro number. Therefore one mole of every elements contains Avogadro number of atoms.

Thus, one mole of hydrogen gas contains 6.022 × 10²³ H₂.

One  mole of water contains  6.022 × 10²³  water molecules. One water molecule is made of two hydrogens and one oxygens. One mole of water contains 6.022 × 10²³  molecules.

Therefore, two moles of water contains 2 × 6.022 × 10²³ = 1.2 × 10²⁴  H₂ Therefore, the number of hydrogen atoms in one mole of  H₂ gas and two moles of water are not equal.

To find more on Avogadro number, refer here:

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Answer:

Zn+2HCL➡️ZnCl2+H2

Explanation:

1 zn+ 2 hcl ➡️ 1 zn +2cl and 2 hcl(2hcl)

Does it is a complete qwestion? It

is not clearef

the first one is "5" and "4.5"

the second one is "2" and  "11"

then after that the multiple choice one is "mean" and "median" in other words A and B

your welcome

Answer:

a.) It matches the universal pH indicator and is indicating the proper pH.

Explanation:

it says its the answer.

Answer:

Explanation:

An object is thrown vertically from the ground upwards with a speed of 10 m/s. Considering g = 10 m/s2, the maximum height that the object reaches from the ground, in meters, will be:

a) 15.0.

b) 10.0.

c) 5.0.

d) 1.0.

e) 0.5.

Answer:

hyprogenic

Explanation:

hope it's help

make me brainless tyy

Answer:

90.6 mL.

Explanation:

Recall the ideal gas law:

[tex]\displaystyle PV = nRT[/tex]

Where P is the pressure; V is the volume; n is the number of moles of gas; R is the universal gas constant; and T is the absolute temperature.

Because only P, V, and T changes, we can rearrange the equation to:
[tex]\displaystyle \frac{PV}{T}= nR[/tex]

The right-hand side is some constant. In other words:

[tex]\displaystyle \frac{P_1V_1}{T_1} = \frac{P_2V_2}{T_2}[/tex]

The initial measurements are 109 kPa, -12.5 °C, and 80.0 mL.

Convert kPa to atm:
[tex]\displaystyle 109\text{ kPa} \cdot \frac{1\text{ atm}}{101.3 \text{ kPa}} = 1.08\text{ atm}[/tex]

And convert temperature to kelvins:

[tex]\displaystyle T_k = (-12.5) + 273.15 = 260.6\text{ K}[/tex]

STP is given by 1 atm pressure and 0 °C (273.15 K). Hence, substitute:
[tex]\displaystyle \frac{(1.08\text{ atm})(80.0\text{ mL})}{(260.6\text{ K})} = \frac{(1\text{ atm})V_2}{(273.15\text{ K})}[/tex]

Solve for volume:
[tex]\displaystyle V_2 = 90.6\text{ mL}[/tex]

In conclusion, the volume of the gas at STP is 90.6 mL.

Check: Volume is indirectly proportional to pressure and directly proportional to temperature. Because we decreased the pressure (1.08 atm to 1.00 atm) and increased the temperature (260.6 K to 273.15 K), we should expect an overall increase in volume.

Answer: For disadvantages, 1,2, and 3.

Answer:

Saber tooth tiger

Explanation:

Saber tooth tiger is pretty dangerous and around the world are few meaning were killed

Answer:

273 K, 101.3 kPa

Explanation:

the standard pressure he can use is 101.3 kPa and standard temperature= 273 K

Answer: I’m guessing ibhs and mr Kadda right?

Explanation:I’m stuck too

Answer:

A

Explanation:

Because, condensation occurs due to the drop in the temperature of the gas therefore turning into liquid.

Answer:

2H3PO4 +3Ca(OH) 2 = Ca3 (PO4) 2 +6H20

Answer:

siks creo que creo que siks

Answer:

Lithium

Explanation:

So, the elements with similar properties to sodium (Na) are all of those elements in the same Group. The ones "most" similar would be the ones closest in mass as well. Those would be Lithium (Li) and Potassium (K)

Answer:

0.232 moles

Explanation:

because the mass is 13.0g and the relative molecular mass is 56.1049