Grams, moles, particles

In chemistry, a "mole" is:

• The mass of an atom
• a large number used to count particles
• based on the volume of a substance

What is the molar mass of NaCl?

• 58.45g/mol
• 28g/mol
• 12g/mol
• 6.02 x 10²³

What is the molar mass of C₂H₄O₂?

• 40g
• 50g
• 60g
• 68g

What would be the mass of 1.5mol H₂O

• 20
• 27
• 32
• 40

What is the mass of 0.75 moles of (NH₄)₃PO₄?

• 101.75 g
• 121.75 g
• 111.75 g
• 131.75 g

Tags

NGSS.HS-PS1-7

How many particles would be in 8.4 moles of Octane (C₈H₁₈)?

• 5.77 x 10²³
• 5.04 x 10²⁴
• 5.77 x 10²⁶
• 5.04 x 10²³

Tags

NGSS.MS-PS1-1

Which has more molecules?

• 1 mole H₂O
• 1 mole Al(OH)₃
• 1 mole NaCl
• There are all the same

Tags

NGSS.MS-PS1-1

Determine the amount of moles in 4.50 x 10²³ atoms of fluorine.

• 9.03 x 10⁴⁶ moles
• 0.757 moles
• 4.73 moles
• 0.0131 moles

Tags

NGSS.HS-PS1-7

How many formula units of NaCl in 29.25 g of NaCl?

• 6.02 x 10²³ formula units

• 3.01 x 10²³ formula units

• 1.59 x 10²⁸ formula units

• 0.083 x 10^-23 formula units

How many grams of NH₃ are there in 4.5 x 10²³ molecules of NH₃?

• 17.0 g

• 0.747 g

• 12.7 g

• 102.34 g