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3 years ago

What is the volume of 8.50 moles of hydrogen gas?

1 answer:

3 0

Okay!
8.50molH, represents 8.50 moles of Hydrogen gas!

To convert from moles to volume multiply it by the ratio of L/molH
mol of anything in a conversion problem is always 1 unless you are going to an unknown! Try to memorize this, but the number you always put in for the # of liters in a conversion problem is 22.4L (L is a measure of volume)

8.50molH * (22.4 L/ 1 molH)

190.L of Hydrogen Gas.

Hope that helped!

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Consider 5.00 L of a gas at 365 mmHg and 20. ∘C . If the container is compressed to 2.30 L and the temperature is increased to 4

lakkis [162]

Answer:

P₂ = 1.12 atm

Explanation:

To find the new pressure, you need to use the Combined Gas Law:

$\frac{P_1V_1}{T_1}=\frac{P_2V_2}{T_2}$

In this equation, "P₁", "V₁", and "T₁" represent the initial pressure, volume, and temperature. "P₂", "V₂", and "T₂" represent the new pressure, volume, and temperature. Before plugging the values into the equation, you need to

(1) convert the pressure from mmHg to atm (760 mmHg = 1 atm)

(2) convert the temperatures from Celsius to Kelvin (°C + 273)

The final answer should have 3 sig figs like the given values.

P₁ = 365 mmHg / 760 = 0.480 atm P₂ = ? atm

V₁ = 5.00 L V₂ = 2.30 L

T₁ = 20°C + 273 = 293 K T₂ = 40°C + 273 = 313 K

$\frac{P_1V_1}{T_1}=\frac{P_2V_2}{T_2}$ <----- Combined Gas Law

$\frac{(0.480 atm)(5.00 L)}{293 K}=\frac{P_2(2.30 L)}{313 K}$ <----- Insert values

$0.00819=\frac{P_2(2.30 L)}{313 K}$ <----- Simplify left side

$2.56 = P_2(2.30L)$ <----- Multiply both sides by 313

$1.12 = P_2$ <----- Divide both sides by 2.30

6 0

7 months ago

Acetic acid has a heat of fusion of 10.8 kJ/mol and a heat of vaporization of 24.3 kJ/mol. What is the expected value for the he

photoshop1234 [79]

Answer: 35.1 kJ/mol

Explanation:

According to Hess’s law of constant heat summation, the heat absorbed or evolved in a given chemical equation is the same whether the process occurs in one step or several steps.

According to this law, the chemical equation can be treated as ordinary algebraic expression and can be added or subtracted to yield the required equation. That means the enthalpy change of the overall reaction is the sum of the enthalpy changes of the intermediate reactions.

$CH_3COOH(s)\rightarrow CH_3COOH(l)$ $\Delta H_{fusion}=10.8kJ/mol$ (1)

$CH_3COOH(l)\rightarrow CH_3COOH(g)$ $\Delta H_{vap}=24.3kJ/mol$ (1)

The final reaction is:

$CH_3COOH(s)\rightarrow CH_3COOH(g)$ $\Delta H_{sub}=?$ (3)

By adding (1) and (2)

$\Delta H_{sub}=\Delta H_{fusion}+\Delta H_{sub}=+10.8kJ+(+24.3kJ)=35.1kJ$

Hence the expected value for the heat of sublimation of acetic acid is 35.1 kJ/mol

6 0

3 years ago

Which choice is characterized by being malleable? A. metaloids B. metals C. noble gases D. nonmetals

Ainat [17]

The correct answer is metals

4 0

3 years ago

Read 2 more answers

Calculate the molar mass of (NH4)2SO4. molar mass of (NH4)2SO4=__N*__+__*__+__*__+__ O*__=__ g/mol (total)

Alinara [238K]

Answer:

132 g/mol

Explanation:

(NH₄)₂SO₄ has 2 nitrogen atoms, 8 hydrogen atoms, 1 sulfur atom, and 4 oxygen atoms.

From the periodic table, the molar mass of each element is:

N: 14.0 g/mol

H: 1.01 g/mol

S: 32.1 g/mol

O: 16.0 g/mol

So the molar mass of the compound is:

2N × (14.0 g/mol N) + 8H × (1.01 g/mol H) + 1S × (32.1 g/mol S) + 4O × (16.0 g/mol O)

= 28.0 + 8.08 + 32.1 + 64.0 g/mol

= 132 g/mol

If you need more precision, use more significant figures for the element molar masses.

4 0

2 years ago

The condensation reaction that forms nucleic acid polymers occurs between a _____ group on one nucleotide and a _____ group on a

frozen [14]

Answer:

1=hydroxyl of phosphate

2=hydroxyl

Explanation:

Nucleic acid is the condensation polymer of nucleotide. Nucleotides are link together through ester bond. The hydroxyl group of phosphate on one nucleotide goes to condensation reaction with the hydroxyl group of another nucleotide. This is chain process, a large molecule of nucleic acid is formed. It is also called polynucleotide.

RNA and DNA are formed by the nucleic acid. The building block of nucleic acid made up of three chemicals.

Pentose sugar
Base
Phosphate

Pentose sugar:

The sugars present in DNA and RNA is pentose. In DNA this sugar is deoxyribose while in case of RNA this is ribose sugar. The hydroxyl groups are present on these sugars. Ribose consist of four hydroxyl group while deoxyribose consist of three hyrdroxyl group. These react with phosphoric acid and carboxylic acid and form ester.

Base:

RNA and DNA are consist of four bases:

DNA= Adenine, guanine, thymine, cytosine

RNA= Adenine, guanine, uracil, cytosine

Phosphate:

The inorganic acid H3PO4 is present. The hydroxyl group present on it undergoes the reaction with amines and alcohol to form amide and ester respectively.

3 0

3 years ago