Consider the reaction.

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which statement is true at stp? (the atomic mass of zn is 65.39 u.)
2 mol of hcl produce 1 l of h2 gas.
1 l of zn produces 1l of h2 gas.
65.39 g of zn produce 22.4 l of h2 gas.
1 l of hcl produces 1 mol of h2 gas.

65.39g of Zn will produce 22.4L of gas.

Explanation: For a reaction,

2 moles of HCl produces 1 mol of gas.

Molar Volume of gas for 1 mole at STP = 22.4 litres

As seen from the balanced chemical equation, 1 mole of Zn gives 1 mole of gas. Hence 22.4L of gas is produced.

the child will have heterozygous dominant chromosomes as characters of his father are dominant over the characters of his mother.

the child is heterozygous