Advertisements
Advertisements
प्रश्न
Calculate the relative molecular masses of the following
CHCI3
[At mass : C = 12, H = 1, O = 16, Ci = 35.5, N = 14, Cu = 63.5, S = 32, K = 39, Pt = 195, Ca = 40, P = 31, Mg = 24]
Advertisements
उत्तर
molecular mass of chloroform (CHCl3)
= mass of carbon + mass of hydrogen + 3 x mass of chlorine
= 12 + 1 + 3 x 35.5
= 119.5g
APPEARS IN
संबंधित प्रश्न
Calculate the molecular mass of NH3.
Calculate the molecular masses of the following :
Chlorine, Cl2
(Atomic masses : H = 1 u ; O = 16 u ; Cl = 35.5 u ; N = 14 u ; C = 12 u)
Calculate the molar masses of the following substances. Write the results with proper units.
- Ozone molecule, O3
- Ethanoic acid, CH3COOH
A gas cylinder of capacity of 20 dm3 is filled with gas X the mass of which is 10 g. When the same cylinder is filled with hydrogen gas at the same temperature and pressure the mass of the hydrogen is 2 g, hence the relative molecular mass of the gas is ______.
Calculate:
The volume of 4g of H2 at 4 atmosphere.
Calculate:
The mass of oxygen in 2.2 litres of CO2 at STP.
Urea [CO(NH2)2] is an important nitrogenous fertilizer. Urea is sold in 50 kg sacks. What mass of nitrogen is in one sack of urea?
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.
What are ionic and molecular compounds? Give examples.
Write the name of the following compound and deduce its molecular mass.
CO2
