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My name is Ann [436]
3 years ago
9

How many moles are contained in a 4.67-l sample of gas at 30°c and 199 kpa?

Chemistry
2 answers:
dezoksy [38]3 years ago
8 0

Answer is: 0.37 moles are contained.

p = 199 kPa; pressure of the gas.

T = 30°C = 303.15 K; temperature of the gas.

V = 4.67 L; volume of the gas.

R = 8.314 J/K·mol; gas constant..

Use ideal gas law: p·V = n·R·T.

n = p · V ÷ (R · T).

n = 199 kPa · 4.67 L ÷ (8.314 J/K· mol · 303.15 K).

n = 0.37 mol; amount of the gas.

ohaa [14]3 years ago
4 0
Pv=nRT
where,p=199, R(constant)=8.314, V=4.67 T=30C=293K
n=pv/RT=0.38 moles
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A syringe initially holds a sample of gas with a volume of 285 mL at 355 K and 1.88 atm. To what temperature must the gas in the
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\frac{P_1V_1}{T_1}=\frac{P_2V_2}{T_2}

where,

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We are given:

P_1=1.88atm\\V_1=285mL\\T_1=355K\\P_2=2.50atm\\V_2=435mL\\T_2=?K

Putting values in above equation, we get:

\frac{1.88atm\times 285mL}{355K}=\frac{2.50atm\times 435mL}{T_2}\\\\T_2=\frac{2.50\times 435\times 355}{1.88\times 285}=720.5K

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3 years ago
How many molecules (not moles) of NH3 are produced from 5.25x10^-4 g of H2?
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