Question

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Answer 1

Answer:

(a) 28g of He. - (ii) 7 mol

(b) 0.5 mole of O2. - (iv) 16g

(c) molar mass of common salt. - (i) 58.54g

(d) 1.5 mole of Ca - (iii) 60g

Explanation:

Hope it helps

Answer 2

Explanation:

Refer to the attachment dear........