C1 Quantitative Chemistry

Equation for moles

• moles = Mr ÷ mass

• moles = mass ÷ Mr

• moles = mass x Mr

concentration =

• mass (or moles) ÷ volume

• mass (or moles) x volume

• volume ÷ mass (or moles)

How many particles does "one mole" contain?

• same as the RFM

• 10 x 10^-10

• Avogadro's constant - 6.02x10^23.

Calculate the formula mass of Fe₂O₃

_{Mr Fe= 56 & O=16}

If 5g of carbon reacts with 6g oxygen how much carbon dioxide is produced?