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hhhghnhjjfd
@hhhghnhjjfd
August 2022
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15 задача;
18задача;
19 задача:)
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Darkness21
15.
2Me + O2 --> 2MeO
0,4 г ---- 0, 16 г
2x ------ 32
0,4×32=0,16×2x
x=40 - Ca
18.
2Me + 6HCl --> 3H2 + 2MeCl3
9 г ---- 11, 2 л
2x ---- 3×22,4
2x×11, 2=9×3×22,4
x=27 - Al
19.
3Me + N2 --> Me3N2
19,5г ---- 22, 3г
3x ---- 3x+28
19, 5×(3x+28) = 22, 3× 3x
x=65 - Zn
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Answers & Comments
2Me + O2 --> 2MeO
0,4 г ---- 0, 16 г
2x ------ 32
0,4×32=0,16×2x
x=40 - Ca
18.
2Me + 6HCl --> 3H2 + 2MeCl3
9 г ---- 11, 2 л
2x ---- 3×22,4
2x×11, 2=9×3×22,4
x=27 - Al
19.
3Me + N2 --> Me3N2
19,5г ---- 22, 3г
3x ---- 3x+28
19, 5×(3x+28) = 22, 3× 3x
x=65 - Zn