October 2018 1 34 Report
Logam X mempunyai massa 11,2 gram tepat habis bereaksi dengan larutan HCl encer menghasilkan 6,72 liter gas H2 (STP).
Reaksi: 2X + 6HCl - 2XCl3 + 3H2
Massa atom relatif logma X adalah...
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