#1
k2co3+2hno3=2kno3+co2+h2o
#2
ca(no2)2+k2co3=2kno2+caco3
#3
na2co3+2hcl=2nacl+h2o+co2
n(na2co3)=m(na2co3)/M(na2co3)=26/106=0.245моль
n(co2)=n(na2co3)=0.245моль
V(co2)=n(co2)*Vm=0.245*22.4=5.488л
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Answers & Comments
#1
k2co3+2hno3=2kno3+co2+h2o
#2
ca(no2)2+k2co3=2kno2+caco3
#3
na2co3+2hcl=2nacl+h2o+co2
n(na2co3)=m(na2co3)/M(na2co3)=26/106=0.245моль
n(co2)=n(na2co3)=0.245моль
V(co2)=n(co2)*Vm=0.245*22.4=5.488л