Moles Test I

What are the units for molar mass?

• grams
• amu
• grams/mole
• liters

What is the mass of one mole of aluminum?

• 26.982 g
• 13 g
• 53.985 g
• 14 g

What is the molar mass of B₂(CO₃)₃?

• 81.632 g/mol
• 94.842 g/mol
• 38.822 g/mol
• 201.648 g/mol

How many grams are in 3.62 mol of dicarbon tetroxide?

• 88.0
• 3.62
• 319
• 159

Tags

NGSS.HS-PS1-7

How many moles are in 16.94g of water?

• 16.94
• 0.9403
• 305.2
• 1.063

How many molecules are in 2.5 mol of NaCl?

• 1.51x10²³

• 146

• 4.15

• 1.51x10²⁴

How many molecules are in 9.4 moles of AlCl₃?

• 5.66
• 5.66x10²⁴
• 0.705
• 1.25x10²³

Tags

NGSS.HS-PS1-7

What is the percent by mass of magnesium in MgO?

• 20%
• 40%
• 50%
• 60%

What is the mass in grams of 5.90 mol C₈H_18?

• .0512 g
• 19.4 g
• 673 g
• 389 g

Tags

NGSS.HS-PS1-7

What volume is occupied by 10 moles of ammonia, NH₃, at standard conditions?

• 6 x 10²⁴ liters 
• 170 liters
• 224 liters
• 32.4 moles