Dalam 1 mol NaOH (Ar Na = 12, O = 16, H =1) terdapat persen massa natrium (Na) sebesar….
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Jawaban:
57,5%
Penjelasan:
*disini kuralat Ar Na = 23
persen Na = Ar Na/Mr NaOH x 100%
= 23/23+16+1 x 100%
= 23/40 x 100%
= 57,5%