Question

Compute the number of Mg2+ ions present in 4 grams of MgO. ​

Answer 1

Answer:

mass of MgO = 24.3+16= 40.3

mass percent of Mg²+= 24.3/40.3×100= 60.3%

thus mass of 4 grams of MgO contains= 4×60.3/100 =2.412 grams of Mg2+

Answer 2

Answer:

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