QUESTION Volume and moles of a gas are proportional at const

QUESTION Volume and moles of a gas are proportional. (at constant P and directly inversely QUESTION 2 Volume and pressure of a gas are proportional (at constant T and n). directly inversely QUESTION 3 A sample of hydrogen gas (H2) has a volume of 44.8 L at a temperature of 273 K and a pressure of 1·00 atm. Caculate the amount of H2, in moles, present in this gas sample. 1.00 mole 2.00 moles 0.500 moles 0.164 moles none of these

Solution

1)

ideal gas law is:

P*V = n*R*T

V and n are directly proportional

Answer: directly

2)

ideal gas law is:

P*V = n*R*T

P and V are inversely proportional

Answer: inversely

3)

we have:

P = 1.0 atm

V = 44.8 L

T = 273.0 K

find number of moles using:

P * V = n*R*T

1 atm * 44.8 L = n * 0.08206 atm.L/mol.K * 273 K

n = 2.00 mol

Answer: 2.00 mol

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