Chemistry Calculations Intro

The correct formula for finding moles is:

• Moles x molar mass

• molar mass / mass

• mass / molar mass

• 6.02214076×10²³

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

• 18.02 g

• 36.04 g

• 90.1 g

• 25.0g

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

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

• 0.1 g
• 9.3 g
• 100 g
• 189 g

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

• 53
• 63.55g
• 126.9
• 6.02 x 10²³

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

• 5.07 x 10²³

• 5.07 x 10²⁴

• 1.31 x 10²⁶

• 5.04 x 10²³

What is the volume occupied by 1 mole of any gas at RTP?

• 44.8 dm3

• 22.4 dm3

• 16.8 dm3

• 24 dm3

What is the volume of 5 moles of oxygen gas at RTP?

• 112 dm3

• 22.4 dm3

• 120 dm3

• 24 dm3