Answer: 1618.8g of Zinc
Explanation:
We begin by writing a balanced chemical equation for the reaction.
Zn (s) + H2SO4 (aq) ----------> ZnSO4 (aq) + H2 (g)
Atomic mass of Zinc is 65.4g/mol
Molecular mass of hydrogen gas is 2.02 g/mol
Looking at the balanced equation;
2.02g is produced by 65.4g of Zn
50g would be produced by 65.4÷ 2.02 x 50 = 1618.8g of Zinc
Answer:
290.82g
Explanation:
The equation for the reaction is given below:
2Al + 3H2SO4 -> Al2(SO4)3 + 3H2 now, let us obtain the masses of H2SO4 and Al2(SO4)3 from the balanced equation. This is illustrated below:
Molar Mass of H2SO4 = (2x1) + 32 + (16x4) = 2 + 32 +64 = 98g/mol
Mass of H2SO4 from the balanced equation = 3 x 98 = 294g
Molar Mass of Al2(SO4)3 = (2x27) + 3[32 + (16x4)]
= 54 + 3[32 + 64]
= 54 + 3[96] = 54 + 288 = 342g
Now, we can obtain the mass of aluminium sulphate formed by doing the following:
From the equation above:
294g of H2SO4 produced 342g of Al2(SO4)3.
Therefore, 250g of H2SO4 will produce = (250 x 342)/294 = 290.82g of Al(SO4)3
Therefore, 290.82g of aluminium sulphate (Al(SO4)3) is formed.
2-8-2
it has 2 number of electrons in its outermost shell