Question

calculate the molecular mass of co2, c2H2, NH3,CH3OH​

Answer 1

molecular mass of

carbon =12u

hydrogen=1u

nitrogen=14

oxygen=16u

CO2=12+2×16=12+32=44u

C2H2=12×2+1×2=24+2=26u

NH3=14+1×3=14+3=17

CH3OH=12+1×3+16+1=12+3+17=32u

Answer 2

co2 = 12+ 16×2 = 12+32 = 44 moles

c2h2 = 12×2+1×2 = 24+2 = 26 mole

NH3 = 14+1×3 = 17 moles

CH3OH = 12+1×3+16+1 = 32 moles