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maria330
@maria330
August 2022
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времени мало, помогите. химия
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krioira
3. Mr(Ca(ClO)2)=40+2*35.5+2*16=143
Mr(FeS)=56+32=88
4. M(K2MnO4)=2*39+55+4*16=197
W(K)=78/197=0.40=40%
W(Mn)=55/197=0.28=28%
W(O)=64/197=0.32=32%
5. m=165 (г)
n=m/M
M(Na)=23(г/моль)
n=165/23=7.17(моль)
m= 5 (г)
M(Cl2)=2*35.5=71(г/моль)
n=5/71=0.07(моль)
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Answers & Comments
Mr(FeS)=56+32=88
4. M(K2MnO4)=2*39+55+4*16=197
W(K)=78/197=0.40=40%
W(Mn)=55/197=0.28=28%
W(O)=64/197=0.32=32%
5. m=165 (г)
n=m/M
M(Na)=23(г/моль)
n=165/23=7.17(моль)
m= 5 (г)
M(Cl2)=2*35.5=71(г/моль)
n=5/71=0.07(моль)