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Formulas, Molar Mass, Gas Laws, Energy
Test Description: Review Questions surrounding formulas.
Instructions: Answer all questions to get your test result.
1) 25.0 mL of water increases temperature from 97°C to 100°C, what is its new volume?
A
75.0 mL
B
25.2 mL
C
0.0258 L
D
3.88 L
2) What is the molar mass of CH₃OH (methanol)?
A
31.04 g/ mol
B
32.05 g/mol
C
18.02 g/mol
D
56.07 g/mol
3) A gas at 15.0 atm increases temperature from 97°C to 100°C, what is its new pressure?
A
64.3 psi
B
784 mmHg
C
222 kPa
D
15.1 atm
4) What is the molar mass of CaCO₃ (Calcium Carbonate)?
A
173.6 g/mol
B
204.1 g/mol
C
104.2 g/mol
D
100.08 g/mol
5) 2.34 g of He is how many moles?
A
1.73 mol
B
0.585 mol
C
2.57 mol
D
9.45 mol
6) What is the molar mass of Fe(H₂O)₄(OH)₂?
A
161.92 g/mol
B
223.14 g/mol
C
336.03 g/mol
D
84.76 g/mol
7) 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
43.7 L
C
124 L
D
8.94 L
8) 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
22 atm
B
11 atm
C
44 atm
D
33 atm
9) 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
884.6 K
B
455.2 K
C
1334 C
D
46.5 C
10) What is the SI unit of heat?
A
Joules
B
Kilocalories
C
Kilojoules
D
Calories
*select an answer for all questions
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