Moles Re-Test La Fountain

What is the molar mass of water (H2O)?

• 16.043

• 22.010

• 20.008

• 18.015

What is Avogadro's number?

• Approximately 6.022 x 10^23

• Approximately 6.022 x 10^22

• Approximately 6.022 x 10^24

• Approximately 6.022 x 10^25

Tags

NGSS.HS-PS1-7

How many grams are in 1 mole of carbon (C)?

• 16.00

• 6.02

• 24.31

• 12.01

How many liters are in 1 mole of any gas at STP?

• 2.24 liters

• 0.224 liters

• 22.4 liters

• 224 liters

What is the percent composition of carbon (C) in carbon dioxide (CO2)?

• 10%

• 27.27%

• 75%

• 50%

What is the molar mass of sulfuric acid (H2SO4)?

• 36.46 g/mol

• 63.55 g/mol

• 98.09 g/mol

How many moles are in 50 grams of sodium chloride (NaCl)?

• 0.5

• 1.5

• 0.856

• 2.5

How many grams are in 2 moles of oxygen gas (O2)?

• 64

• 32

• 256

• 128

How many liters are in 3 moles of helium gas (He) at STP?

• 67.2 liters

• 3 liters

• 30 liters

• 0.3 liters

What is the percent composition of hydrogen (H) in ammonia (NH3)?

• 20%

• 5.88%

• 30%

• 10%