C3: Calculating mass

Question 1

step 1 (calculating mass)

Answer 1

write out the balanced equation

Question 2

step 2 (Cm)

Answer 2

find moles of known substance (moles = mass / Mr)

Question 3

step 3 (Cm)

Answer 3

find molar ratio of know substance : unknown substance and divide / multiply known substance in moles to find moles of unknown substance

Question 4

step 4 (Cm)

Answer 4

find mass of unknown substance (mass = moles x Mr