Question

Calculate the relative molecular mass of each of the following.
Hydrated copper sulphate (CuSO4.5H20)
Urea (NH,CONH2)​

Answer 1

Answer:

relative molecular mass of (CuSO4.5H2O)

63.5 +32+ (16*4)+5(2+16)

159.5 + 90

=259.5

relative molecular mass of urea is

element. number of atom atomic mass. total

N. 2. 14. 28

c. 1. 12. 12

h. 4. 1. 4

o. 1. 16. 16

+

60

RMM =60 percentage of nitrogen is equals to weight of nitrogen upon total weight of urea * 100

28/60*100=46.67%

Answer 2

Answer:

Molar mass of CuSO4.5H2O = 249.685 g/mol

Convert grams CuSO4.5H2O to moles  or  moles CuSO4.5H2O to grams

Molecular weight calculation:

63.546 + 32.065 + 15.9994*4 + 5*(1.00794*2 + 15.9994)

Percent composition by elementElement  Symbol  Atomic Mass  # of Atoms  Mass PercentCopperCu63.546125.450%HydrogenH1.00794104.037%OxygenO15.9994957.671%SulfurS32.065112