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Verified answer
Mapel: KimiaKelas: X
Materi: Stoikiometri
Kata Kunci: -
Jawab
rumus mencari massa
gr=n×Mr atau Ar
a) Mr NaOH
23+16+1 = 40gr/mol
gr=n×Mr
gr = 25×40
gr= 1000gram
b) Ar Ca = 40
gr=n×Mr
gr=0,5×40
gr= 20gram
c) CH4
Mr= 16gr/mol
gr=n×Mr
gr= 0,4×16
gr= 6,4gram