Solve the questions in the attachment....!!
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Answer:(a)4.5g
Explanation:
Weight of 1 mol H20 is 18g
so, the weight of 0.25 mol h20 is 18*0.25=18/4=4.5g
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Answer:
1 mole of water weighs equal to the molecular mass of water. Thus the amount of present in 0.25 mole of it is 4.5 grams.
There are 6.022*10^23 molecules present in 22400cm^3 gas.
Therefore the no. of molecules present in 22.4cm^3=
6.022*10^23 * 22.4cm^3 divide by:
224000 cm^3
Hence we get the ans as 6.022*10^20 molecules.
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