Compound Calculations

How many moles in 478.5g of CuSO₄?

How many moles in 510g of Al₂O₃?

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

How many molecules are in 1 mole of chlorine (Cl₂)?

• 6.02x10²³

• 6.02x10²⁴

• 4.21x10²⁵

• 4.21x10²³

How many molecules are in 6 mole of H₂SO₄?

• 6.02x10²³

• 6.02x10¹³⁸

• 5.90x10²⁵

• 3.61x10²⁴

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

How many grams are in 7.8 moles of NaCl?

• 476 grams

• 456 grams

• 452 grams

• 462 grams