August 2018 1 22 Report
Senyawq kristal na3po4.12h2o dipanaskan hingga semua air kristalnya menguap. setelah penguapan, massa kristal tinggal 16,4 gram. jika Ar: na=23, p=31, o=16, h=1, massa senyawa kristal adalah .... gram.
a.21,6
b.38,0
c.59,6
d.66,0
e.76,0

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