Two-Step Conversions: Particles to Mass

Which conversion factor should be used to solve the following, "Find the mass in grams of 2.00 x 10²³ molecules of F₂."

• 1 mol = 22.4 L

• 1 mol = 38.00 g

• 1 mol = 6.022x10²³ atoms

• more than one

The number 6.022 x 10²³, which is the number of particles found in a mole, is also called_________. 

• molar mass
• mole
• Avogadro's number
• hydrate

Which of the following dimensional analysis setups will correctly convert 27.76g of Li to atoms of Li? (we would round the molar mass to 2 decimal places)

• A

• B

• C

• D

How many grams does 1.2 x 10²⁴ molecules of CO weigh?

• 28 grams

• 56 grams

• 6.02 grams

• 1.2 grams

How many molecules are in 126 grams of AlCl₃?

• 5.68 molec AlCl₃

• 5.68x10²⁴ molec AlCl₃

• 5.69 x10²³ molec AlCl₃

• 1.25x10²³ molec AlCl₃

How much would 2.05 x 10²¹ molecules of CO₂ weigh in grams?

• 0.01498 grams
• 1.498 grams
• 0.150 grams
• 0.0954 grams

Tags

NGSS.HS-PS1-7

Which conversion factor should be used for the following question " How many molecules are there in 4.00 moles of glucose, C₆H₁₂O₆?

• 1 mole = 78.12 g

• 1 mole = 22.4 L

• 1 mol = 6.022x 10²³ particles

• more than one

Convert 1.506 x 10²⁵ molecules of CaCO₃ into grams.

• 2503 grams

• 1702.25 grams

• 250.25 grams

• 9.061x10⁴⁶ grams

How many molecules of Fe₂O₃ are in 150 grams of Fe₂O₃?

• 6.2 x 10²³ molecules
• 5.7 x 10²³ molecules
• 7.07 x 10²³ molecules
• 1.26 x 10²³ molecules

Tags

NGSS.HS-PS1-7

How many grams of H₂ are in 1.204 x 10²⁴ molecules?

• 4.039 grams

• 2.000 grams

• 4 grams

• 2 grams