Question

помогите!!!!! без спама!!!​

Answer 1

Mr (H3PO4) = 3 + 31 + 64 = 98

w (H) = 3 / 98 * 100 = 3 процента

w (P) = 31 / 98 * 100 = 31.6 процент

w (O) = 64 / 98 * 100 = 65.4 процента