Formulas, Molar Mass, Gas Laws, Energy Question Preview (ID: 53084)


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25.0 mL of water increases temperature from 97°C to 100°C, what is its new volume?
a) 25.2 mL
b) 75.0 mL
c) 0.0258 L
d) 3.88 L

What is the molar mass of CH₃OH (methanol)?
a) 31.04 g/ mol
b) 18.02 g/mol
c) 32.05 g/mol
d) 56.07 g/mol

A gas at 15.0 atm increases temperature from 97°C to 100°C, what is its new pressure?
a) 784 mmHg
b) 64.3 psi
c) 222 kPa
d) 15.1 atm

What is the molar mass of CaCO₃ (Calcium Carbonate)?
a) 100.08 g/mol
b) 104.2 g/mol
c) 204.1 g/mol
d) 173.6 g/mol

2.34 g of He is how many moles?
a) 1.73 mol
b) 2.57 mol
c) 9.45 mol
d) 0.585 mol

What is the molar mass of Fe(H₂O)₄(OH)₂?
a) 161.92 g/mol
b) 223.14 g/mol
c) 84.76 g/mol
d) 336.03 g/mol

A balloon contains 30.0 L of helium gas at 103kPa. What is the volume of the helium when the balloon rises to an altitude where the pressure is only 25.0 kPa?
a) 76.4 L
b) 124 L
c) 43.7 L
d) 8.94 L

2.5 g of H2 gas has a temp of 300K, a volume of 2.8L. What is the pressure of the hydrogen gas? The molar mass of hydrogen gas is 2.0 g/mole.
a) 11 atm
b) 22 atm
c) 33 atm
d) 44 atm

Oxygen gas is at a temperature of 40 C when it occupies a volume of 2.3 L. To what temperature should it be raised to occupy a volume of 6.5 L?
a) 46.5 C
b) 884.6 K
c) 455.2 K
d) 1334 C

What is the SI unit of heat?
a) Calories
b) Kilocalories
c) Joules
d) Kilojoules

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