Advertisements
Advertisements
प्रश्न
Calculate the mass of 12.044 × 1025 molecules of oxygen (O2).
Advertisements
उत्तर
12.044 × 1025 molecules of oxygen
Mass of 6.022 × 1023 molecules of oxygen = 32g
Mass of one molecule of oxygen = 32 / 6.022 × 1023 = 5.3 × 10−23g
Mass of 12.044 × 1025 molecules of oxygen = 5.3
10−23 × 12.044 × 1025 g = 6400g or 6.4kg
Hence, the mass of 12.044 × 1025 molecules of oxygen is 6.4kg.
APPEARS IN
संबंधित प्रश्न
What is meant by saying that ‘the molecular mass of oxygen is 32’ ?
Calculate the molecular mass of chloroform (CHCl3). (Atomic masses : C = 12 u ; H = 1 u ; Cl = 35.5 u)
How many molecules are present in one gram molecular mass of a substance ?
If sulphur exists as S8 molecules, calculate the number of moles in 100 g of sulphur. (S = 32 u)
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 molecular mass of the following:
(NH₄)₂SO₄
[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]
Calculate:
The gram molecular mass of chlorine if 308cm3 of it at STP weighs 0.979 g.
Calculate the weight/mass of 0.25 gram atom of calcium.
Molar mass of CO2 is 42g.
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.
