Advertisements
Advertisements
Question
Calculate the molecular mass of C2H4.
Solution
Molecular mass of C2H4 = 2 × Atomic mass of C + 4 × Atomic mass of H
= (2 × 12 + 4 × 1) u
= (24 + 4) u
= 28 u
APPEARS IN
RELATED QUESTIONS
Calculate the formula unit mass of K2CO3 given the atomic mass of
- Zn = 65 u
- Na = 23 u
- K = 39 u
- C = 12 u
- O = 16 u
The molecular formula of glucose is C6H12O6. Calculate its molecular mass. (Atomic masses : C = 12 u ; H = 1 u ; O = 16 u)
Calculate the molecular mass of ethanoic acid, CH3COOH.
(Atomic masses : C = 12 u ; H = 1 u ; O = 16 u)
Convert 12 g of oxygen gas into moles.
Calculate the molecular mass of the following:
CH3COONa
[At mass : C = 12, H = 1, O = 16, Cl = 35.5, N = 14, Cu = 63.5, S = 32, Na = 23, K = 39, Pt = 195, Ca = 40, P = 31, Mg = 24]
Calculate:
The mass of oxygen in 2.2 litres of CO2 at STP.
Calculate the weight/mass of an atom of hydrogen.
Calculate the weight/mass of 0.25 gram atom of calcium.
Calculate the relative molecular mass of ZnCO3.
Write the name of the following compound and deduce its molecular mass.
CO2
