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प्रश्न
Find the weight of 0.2 mole of H2 gas.
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उत्तर
Molecular mass of H2 = (1 × 2) = 2 g
Weight of 1 mole of hydrogen gas = 2 g
∴ Weight of 0.2 mole of H2 = 2 × 0.2
= 0.4 g
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
Calculate the percentage of platinum in ammonium chloroplatinate (NH4)2PtCl6.
[N = 14, H = 1, Pt = 195, Cl =35.5]
(Give your answer correct to the nearest whole number)
A flask contains 3.2g of sulphur dioxide. Calculate the following: The number of molecules of sulphur dioxide present in the flask.
Calculate the percentage of sodium in sodium aluminium fluoride (Na3AIF6).
[F = 19, Na = 23, Al = 27]
A compound 'X' consists of 4.8% of C and 95.2% of Br by mass.
Name the type of chemical reaction by which X can be prepared from ethane.
Give one word or phrase for the following:
Formation of ions from molecules.
Calculate the relative molecular mass of:
CHCl3
Which of the following contains maximum number of molecules?
The atomic mass of Chlorine is 35.5. What is its vapour density?
