Chemical Reactions Quiz

What kind: 2NaOH(s)→Na2O(s)+H2O(g)

• Decomposition

• Replacement

• Double replacement

• Combustion

HCl + NaOH --> NaCl + H2O

• Catwire

• Double replacement

• Combination

• Combustion

What is the percent yield for a reaction with a calculated yield of 9.23 g that produced 7.89 g of product?

• 85.5%

• 90.2%

• 95.6%

• 101.3%

Given the following sets of values, calculate the unknown quantity.

P = 1.01 atm

V = ?

n = 0.00831 mol

T = 25°C

• 0.20 L

• 25.0 L

• 21.2 L

• 0.00833 L

At what temperature does 16.3 g of nitrogen gas have a pressure of 1.25atm in a 25.0 L tank?

• 655 K

• 300 K
• 500 K
• 595.7 K

P = ?

V= 0.602 L

n = 0.00801 mol

T = 311 K

• 0.500 atm

• 192.0 atm

• 0.340 atm

• 12.0 atm

A 113L sample of helium at 27°C is cooled at constant pressure to -78.0°C. Calculate the new volume of the helium.

• 73 L

• 20 L

• 80 L

• 12 L

Calculate the pressure in a 212 Liter tank containing 23.3 kg of argon gas at 25°C?

• 12.45 atm
• 67.3 atm

• 6.21 atm
• 3.84 atm

A sample of argon gas at STP occupies 56.2 liters. Determine the number of moles of argon and the mass of argon in the sample.

• 40.2 g

• 100. g

• 243 g

• 320 g

At what temperature will 0.654 moles of neon gas occupy 12.30 liters at 1.95 atmospheres?

• 32.1 K

• 213 K

• 42.0 K

• 447 K