Chemistry Mole to Grams Empirical Formula Percent Composition

Calculate how many grams are in 0.700 moles of H₂O₂

• 0.02 grams

• 23.8 grams

• 48.6 grams

• 12

The approximate percent by mass of potassium in KHCO₃ is

• 19%

• 24%

• 39%

• 61%

What is the gram formula mass of (NH₄)₂SO₄

• 66g

• 94g

• 114g

• 132g

How many moles are present in 39 grams of LiF?

• 1.0 moles

• 2.0 moles

• 0.5 moles

• 1.5 moles

Tags

NGSS.HS-PS1-7

How many moles are in 92 grams of NO₂?

• 2

• 1

• 0.5

• 4

Tags

NGSS.HS-PS1-7

What is the percent composition by mass of aluminum in Al₂(SO₄)₃ (gram-formula mass = 342 grams/mole)?

• 7.89%

• 15.8%

• 20.8%

• 36.0%

The mass of one mole of substance is called...

• molecular mass

• mole constant

• molar mass

• atomic weight

Tags

NGSS.HS-PS1-7

What is the molar mass of Ca(NO₃)₂?

• 148g/mol

• 164g/mol

• 102g/mol

• 70g/mol

What is the molar mass of carbon dioxide?

• 12 g/mol

• 16 g/mol

• 32 g/mol

• 44 g/mol

Which compound has the smallest molar mass?

• CO

• CO₂

• H₂O

• H₂O₂