Advertisements
Advertisements
प्रश्न
Which of the following contains maximum number of molecules?
विकल्प
4g of O2
4g of NH3
4g of CO2
4 g of SO2
Advertisements
उत्तर
4g of NH3
Explanation:
Molecular mass of O2 = (2 x 16) = 32 g
Molecular mass of NH3 = 14 + (3 x 1) = 17 g (least weight)
Molecular mass of CO2 = 12 + (2 x 16) = 44 g
Molecular mass of SO2 = 32 + (2 x 16) = 64 g
∴ 4 g of NH3 contains = `(6.02 xx 10^23)/17 xx 4`
= 1.41 x 1023
∴ 4 g of NH3 having minimum molecular mass contain maximum molecules.
संबंधित प्रश्न
Calculate the relative molecular mass of Potassium chlorate.
(use K = 39, Cl = 35.5, O = 16, C = 12, H = 1, Na = 23, N = 14, S=32)
A flask contains 3.2g of sulphur dioxide. Calculate the following: The number of molecules of sulphur dioxide present in the flask.
When heated, potassium permanganate decomposes according to the following equation:
\[\ce{2KMnO4 -> \underset{solid residue}{K2MnO4 + MnO2} + O2}\]
Given that the molecular mass of potassium permanganate is 158 g, what volume of oxygen (measured at room temperature) would be obtained by the complete decomposition of 15.8 g of potassium permanganate? (Molar volume at room temperature is 24 litres). [K = 39, Mn = 55, O = 16]
What is the vapour density of ethylene? (Avogadro's number = 6 x 1023; Atomic weight of C = 12, H = 1; Molar volume = 22.4 litres at STP)
A compound 'X' consists of 4.8% of C and 95.2% of Br by mass.
If the vapour density of the compound is 252, what is the molecular formula of the compound?
Give two tests of the following:
Oxygen
Calculate the relative molecular mass of:
CH3COONa
Calculate the relative molecular mass of:
(NH4)2 Cr2O7
If a crop of wheat removes 20 kg of nitrogen per hectare of soil, what mass of the fertilizer, calcium nitrate Ca(NO3)2 would be required to replace the nitrogen in a 10 hectare field?
Ammonia burns in oxygen and the combustion, in the presence of a catalyst, may be represented by;
\[\ce{2NH3 + 2 1/2O2 -> 2NO + 3H2O}\] [H = 1, N = 14, O = 16]
What mass of steam is produced when 1.5 g of nitrogen monoxide is formed?
