moles, grams, molecules, molar mass, and percent comp

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

What are the units for molar mass?

• grams
• amu
• grams/mole
• liters

Tags

NGSS.HS-PS1-7

What is the percent by mass of magnesium in MgO?

• 20%
• 40%
• 50%
• 60%

How many atoms of iodine are in a mole of iodine?

• 53
• 63.55g
• 126.9
• 6.02 x 10²³

Tags

NGSS.MS-PS1-1

What would be the mass of 1.5mol H₂O

• 20
• 27
• 32
• 40

We use the periodic table to calculate...

• mass
• molar mass
• volume
• moles

What is the molar mass of one molecule of Nitrogen N₂?

• 14.01 amu
• 14.01 g
• 28.02 g
• 28.02 amu

Tags

NGSS.HS-PS1-1

1 mole is equal to?

• 100g
• 6.02x10²³ molecules
• 60L
• 6.02x10²³ L

Find the number of molecules in 1.75 moles of Cu metal.

• 1.0535x10²⁴

• 1.05x10²⁵

• 1.05x10²⁴

• 10.54x10²³

Find the number of moles in 4.95x10²⁴ Ne atoms.

• 8

• 0.822

• 8.22

• 8.22x10⁴⁶