Mole conversions

How many molecules are in 2.5 mol of NaCl?

• 1.51x10²³
• 146
• 4.15
• 1.51x10²⁴

Tags

NGSS.HS-PS1-7

How many grams are in 1.2 x 10²⁴ molecules of CO?

• 28 grams
• 56 grams
• 6.02 grams
• 1.2 grams

Tags

NGSS.HS-PS1-7

How many moles are in 3.01 x 10²² atoms of magnesium?

• 0.05 moles
• 1.81 x 10⁴⁶ moles
• 5.00 x 10²¹ moles
• 5 moles

If an atom of Fluorine has an atomic mass of 19 amu, it has a Molar mass of ____

• 19 lbs.
• 19 kg
• How am I supposed to know?
• 19 g/mol

How many molecules of water are in a 821.3 g sample?

• 45.58 molecules

• 8.232 x 10²⁵ molecules

• 8.909 x 10²⁷ molecules

• 2.744 x 10²⁵ molecules

Tags

NGSS.HS-PS1-7

What is the molar mass of Hydrogen Peroxide (H₂O₂)?

• 48 g/mole
• 34.02 g/mole
• 36.5 g/mole
• 35.5 g/mole

How many grams are in

1.2 x 10²⁴ atoms of C?

• 23.94 grams C

• 0.1659 grams C

• 6.02 grams C

• 2.394 X 10⁴⁷ grams C

Tags

NGSS.HS-PS1-7

Given 500.0 Liters of H₂ gas, convert to molecules.

• 6.74 x 10²⁷ molecules H₂
• 1.86 x 10^-20 molecules H₂
• 1.34 x 10²⁵ molecules H₂
• 3.71 x 10^-23 molecules H₂

How many atoms of neon are found in 4.5 liters of neon?

• 1.6744 X 10^-22 atoms Ne

• 1.67 X 10²⁴ atoms Ne

• 1.209 X 10²³ atoms Ne

• 6.068 X 10²⁵ atoms Ne

What is the mass of one mole of (NH₄)₂CO₃?

• 144g
• 138g
• 96g
• 74g