Question

178 g/mol e 346g/mol

148g/mol e 342 g/mol

178g/mol e 342 g/mol

178 g/mol e 342g/mol

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Answer 1

Olá!:

Massas molares:

H₄P₂O₇ = ( 1 * 4 ) + ( 31 * 2 ) + ( 16 * 7 ) => 178 g/mol

Al₂(SO₄)₃ = ( 27 * 2 ) + ( 32 * 3 ) + ( 16 * 12 ) =>  342 g/mol

Alternativa C

Espero ter ajudado!