Question

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1) What is percentage by mass of oxygen in CaSO4*2H2O? (Ca=40, S=32, O=16, H1
5) Unknown compounds contains 13.8 g of sodium, 9.6 g of sulfur and 19.2 g of oxygen. What is the simplest formula of the given compound?( Na=23, S=32, O=16)

Answer 1

Ответ:

Салом ргрлрлвовшвовлвлв