Advertisements
Advertisements
प्रश्न
Calculate the molecular mass of O2.
Advertisements
उत्तर
Molecular mass of O2 = 2 × Atomic mass of O
= 2 × 16u
= 32 u
APPEARS IN
संबंधित प्रश्न
What is the significance of the formula H2O ?
Calculate the molecular masses of the following :
- Hydrogen, H2
(Atomic masses : H = 1 u ; O = 16 u ; Cl = 35.5 u ; N = 14 u ; C = 12 u)
Calculate the molecular mass of hydrogen bromide (HBr). (Atomic masses : H = 1 u ; Br = 80 u)
Calculate the molecular masses of the following compounds :
Ethanol, C2H5OH
What is meant by the ‘molar mass’ of a substance ? State the unit in which molar mass is usually expressed.
Calculate the molecular mass of the following:
Potassium Chlorate.
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 0.25 gram atom of calcium.
What are ionic and molecular compounds? Give examples.
Calcium carbonate react with dilute hydrochloric acid as given below:
\[\ce{CaCO3 + 2HCl -> CaCl2 + H2O + CO2}\]
What is the volume of carbon dioxide liberated at S.T.P. at the same time?
