Advertisements
Advertisements
प्रश्न
Calcium carbonate is decomposed on heating in the following reaction
CaCO3 → CaO + CO2
Calculate the gram molecular mass of calcium carbonate involved in this reaction.
Advertisements
उत्तर
Gram molecular mass of CaCO3
= 40 + 12 + 3(16)
= 100 g
APPEARS IN
संबंधित प्रश्न
Calculate the molecular mass of chloroform (CHCl3). (Atomic masses : C = 12 u ; H = 1 u ; Cl = 35.5 u)
Calculate the molecular masses of the following compounds :
Ethene, C2H4
(Atomic masses : C = 12 u ; H = 1 u)
Define gram molecular mass of a substance. How much is the gram molecular mass of oxygen ?
If sulphur exists as S8 molecules, calculate the number of moles in 100 g of sulphur. (S = 32 u)
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:
Na2SO4.10H2O
Given atomic mass of Cu = 63·5, H = 1, O = 16, C = 12, N = 14, Mg = 24, S = 32
Answer the following question using the data given below:
- Assertion: The Relative Molecular Mass of Chlorine is 35.5 a.m.u.
- Reason: The natural abundance of Chlorine isotopes are not equal.
The mass of one steel screw is 4.11g. Find the mass of one mole of these steel screws. Compare this value with the mass of the Earth (5.98 × 1024kg). Which one of the two is heavier and by how many times?
Write the name of the following compound and deduce its molecular mass.
CO2
A gas occupied 360 cm3 at 87°C and 380 mm Hg pressure. If the mass of gas is 0.546 g, find its relative molecular mass.
