Relative Mass and the Mole

What is the mass of 2.50 mol of oxygen gas O₂?

• 40 g

• 80 g

• 16 g

• 32 g

What is molar mass?

• The mass of an atom

• The mass of a mole of atoms

• The mass of a cute little star-nosed mole

• When did we talk about this?

Tags

NGSS.HS-PS1-7

What is the molar mass of AuCl₃?

• 96 g

• 130 g

• 232.5 g

• 303.3 g

How many moles in 478.5g of CuSO₄?

How many moles in 510g of Al₂O₃?

A compound has a mass of 109.5g and 3 moles. What is the relative formula mass of this compound? _{Give your answer to 1d.p}

A compound has a mass of 109.5g and 3 moles and a relative formula mass of 36.5. What is the compound?

• Cl

• HCl

• SH₄

• AlCl₃

A bag of fertiliser contains 14.52 kg of ammonium nitrate (NH₄NO₃). Calculate the number of moles of ammonium nitrate in the bag of fertiliser.

_{Give your answer to 1d.p}

Tags

NGSS.HS-PS1-7

An aspirin tablet contains 300 mg of acetylsalicylic acid. Calculate the number of moles of acetylsalicylic acid in one aspirin tablet. (Relative formula mass (M_r) of acetylsalicylic acid = 180)

_{Give your answer to 3s.f}

Tags

NGSS.HS-PS1-7

Potassium hydroxide (KOH) powder has 0.005 moles. What is the mass in grams? _{Give your answer to 2d.p}