Chemistry Calculations Review

The correct formula for finding moles is:

• Moles x molar mass

• molar mass / mass

• mass / molar mass

• 6.02214076×10²³

The correct formula for finding mass is:

• Moles x molar mass

• molar mass / mass

• mass / molar mass

• 6.02214076×10²³

Tags

NGSS.HS-PS1-7

The correct formula for finding molar mass is:

• Moles x mass

• moles / mass

• mass / moles

• 6.02214076×10²³

Find the molar mass of calcium carbonate (CaCO₃) to the nearest gram.

• 100 g

• 68 g

• 84 g

• 112 g

Find the mass of 5 moles of water (H₂O).

• 18.02 g

• 36.04 g

• 90.1 g

• 25.0g

Tags

NGSS.HS-PS1-7

How many moles are in 225g of CO (carbon monoxide)?

• 8.03 mole

• 28.01 mole

• 4.82x10²⁴ mole

• 7.50 mole

Tags

NGSS.HS-PS1-7

How many moles are present in 32.3 grams of carbon dioxide (CO₂)?

• 44.01 moles
• 1421.52 moles
• 32.3 moles
• 0.73 moles

Tags

NGSS.HS-PS1-7

A mass of 6 g of Carbon contains

• 1 mole of C
• 2 moles of C
• 0.5 moles of C
• 72 moles of C

Tags

NGSS.HS-PS1-7

How many grams are in 4.5 moles of sodium fluoride, NaF?

• 0.1 g
• 9.3 g
• 100 g
• 189 g

What is the mass in grams of 5.90 mol octane (C₈H₁₈)?

• 673 g

• 0.0512 g

• 389 g

• E) 3.55 x 10²⁴ g

Tags

NGSS.HS-PS1-7