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hodyreva [135]
4 years ago
7

Consider the reaction.

Chemistry
2 answers:
fiasKO [112]4 years ago
6 0

Answer:

mass ZnSO₄ = 50.2 gms (3 sig. figs.)

Explanation:

Pb(SO₄)₂(aq) + 2 Zn(s) => ZnSO₄(aq) + Pb(s)

=> Because coefficients of Zn and ZnSO₄ are the same, 0.311 mole Zn(s) yields the same 0.311 mol ZnSO₄(aq) .

=> Convert moles to grams by multiplying 0.311 moles ZnSO₄  by formula weight of ZnSO₄ (= 161.4 g/mol)

That is, grams ZnSO₄ = 0.311 mole ZnSO₄ x 161.4 g/mol = 50.1954 g ≅ 50.2 g (3 sig. figs.)

N76 [4]4 years ago
5 0

Answer: m = 50 g ZnSO4

Explanation: First is convert the moles of Zn to the moles of ZnSO4 by having their mole ratio which is 2:2 based from the balanced equation. Next is convert the moles of ZnSO4 to mass using its molar mass.

0.311 mole Zn x 2 moles ZnSO4 / 2 moles Zn

= 0.311 moles ZnSO4

0.311 moles ZnSO4 x 161 g ZnSO4 / 1 mole ZnSO4

= 50 ZnSO4

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Answer:

Total mass of original sample = 0.38 g

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Percentage of chloride = 74.5%

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Solution us here,

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here, it looks like I have done wrong.

But all of the answers in option are wrong.

Because, rate of diffusion of any gas is inversely proportional to the square root of its malor mass.

And in the question, gas has higher rate of diffusion than hrdrogen. So it should have molar mass less than hydrogen.

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