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प्रश्न
Which of the following would weigh most?
विकल्प
1 mole of H2O
1 mole of CO2
1 mole of NH3
1 mole of CO
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उत्तर
1 mole of CO2
Explanation:
Molecular mass of H2O = (1 x 2) + 16 = 18 g
Molecular mass of CO2 = 12 + (2 x 16) = 44 g
Molecular mass of NH3 = 14 + (3 x 1) = 17 g
Molecular mass of CO = 12 + 16 = 28 g
∴ 1 mole of CO2 having maximum molecular mass will weigh more.
संबंधित प्रश्न
Aluminium carbide reacts with water according to the following equation :
`Al_4C_3 + 12H_2O-> 4Al(OH)_3 + 3CH_4`
1)What mass of aluminium hydroxide is formed from 12g of aluminium carbide?
2) What volume of methane at s.t.p. is obtained from 12g of aluminium carbide?
[Relatively molecular weight of `Al_4Cl_3 = 144; Al(OH)_3 = 78]`
10g of NaCl solution is mixed with 17g of silver nitrate solution. Calculate the weight of silver chloride precipitated.
AgNO3 + NaCl → AgCI + NaNO3
Water can split into hydrogen and oxygen under suitable conditions. The equations representing the change is: 2H2O(I) → 2H2 (g) + O2(g)
Ammonia burns in oxygen and the combustion in the presence of a catalyst may be represented as:
2NH3 (g) +21/2O2 (g) → 2NO (g) + 3H2O (I)
What mass of steam is produced when 1.5 g of nitrogen monoxide is formed?
Washing soda has the formula Na2CO3.10H2O.What is the mass of anhydrous sodium carbonate left when all the water of crystallization is expelled by heating 57.2 g of washing soda?
Give one word or phrase for the following:
Formation of ions from molecules.
Complete the following calculations. Show working for complete credit :
If the empirical formula of a compound is CH and it has a vapour density of 13, find the molecular formula of the compound.
Calculate the relative molecular mass of:
Potassium chlorate
Calculate the relative molecular mass of:
(NH4)2SO4
Find the weight of 0.2 mole of H2 gas.
Calculate the mass of nitrogen supplied to soil by 5 kg of urea [CO(NH2)2].
[O = 16; N = 14; C = 12; H = 1]
