Advertisements
Advertisements
Question
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]
Advertisements
Solution
CH3COONa = 12 + 3 × 1 + 12 + 16 + 16 + 23
= 12 + 3 + 28 + 39
= 15 + 67
= 82
APPEARS IN
RELATED QUESTIONS
Calculate the molecular mass of C2H6.
Calculate the molecular masses of the following compounds :
Ethane, C2H6
(Atomic masses : C = 12 u ; H = 1 u)
Calculate the molecular masses of the following compounds :
Ethanol, C2H5OH
How many moles are there in 34.5 g of sodium ? (Atomic mass of Na = 23 u)
What is meant by the ‘molar mass’ of a substance ? State the unit in which molar mass is usually expressed.
Write the name of the following compound and deduce its molecular mass.
Na2SO4
From the equation:
\[\ce{C + 2H2SO4 -> CO2 + 2H2O + 2SO2}\]
Calculate:
- the mass of carbon oxidized by 49 g of sulphuric acid (C = 12, relative molecular mass of sulphuric acid = 98)
- the volume of sulphur dioxide measured at STP, liberated at the same time.
(Volume occupied by 1 mole of a gas at STP is 22.4 dm3).
Calculate:
The mass of oxygen in 2.2 litres of CO2 at STP.
What are ionic and molecular compounds? Give examples.
The formula unit mass of Ca3 (PO4)2 is ————.
