Mole/Atoms/Mass

What is the definition of molar mass?

• number of grams per one mole of a substance
• whole number ratio that is a multiple of a chemical formula
• simplest, whole number ratio of a chemical formula
• 6.02 x 10^23 particles per one mole of a substance

Molar mass is in units of ________.

• grams
• grams/mole
• mole
• moles/gram

Tags

NGSS.HS-PS1-7

What is the molar mass of AuCl₃?

• 303.3 g

• 130 g

• 232.5 g

• 303.326 g

What is the definition for Avogadro's number?

• number of grams per one mole of a substance
• whole number ratio that is a multiple of a chemical formula
• simplest, whole number ratio of a chemical formula
• 6.02 x 10^23 particles per one mole of a substance

Which would have more atoms?

• 1 mole of Li
• 1 mole of Au
• 1 mole of Si
• None, all are equal

Tags

NGSS.MS-PS1-1

Which represents the greatest mass of sulfur?

• 1 gram of sulfur
• 1 molecule of sulfur
• 0.5 mole of sulfur
• 6.02 x 10²³ atoms of sulfur

How many moles are present in 32.3 grams of carbon dioxide?

• 44.01 moles

• 1421.52 moles

• 32.3 moles

• 0.734 moles

What is the mass in grams of 5.90 mol C₈H_18?

• .0512 g

• 19.4 g

• 674 g

• 389 g

What is the mass of 2.50 mol of oxygen gas O₂?

• 40.0 g

• 80.0 g

• 16.0 g

• 32.0 g

How many water molecules are in 5.2 moles of water?

• 6.02 x 10²³

• 5.2

• 3.1 x 10²⁴

• 8.6 x 10^-24