Question

calculate the molar mass of CO2, H2SO4, NaCl?

Answer 1

C=12
O=16

H=1
S=32

NA=23
CL=35.5
  CO2=12+16+16=44
H2SO4=1+1+32+16*4
2+96=98
  and NaCl=23+35.5=58.5 approx

Answer 2

molar mass of co2=molal mass of carbon+2(molal mass of oxygen)
12+2(16)=44gm
molal mass of H2SO4=2(molal mass of HYDROGEN)+molal mass of sulphar+4(molal mass of oxygen)
2(1)+32+4(16)=98
molal mass of NACL=molal mass of sodium + molal mass of chlorine=(23+35.5)g=58.5g