Zadanie 1
a) M Br=80 g/mol
b) M Fe2O3=2*56 g/mol+3*16 g/mol=160 g/mol
c) M Se=79 g/mol
d) M Mn2O7=2*55 g/mol+7*16 g/mol=222 g/mol
Zadanie 2
a) M 5 HNO2=5*(1 g+14 g+2*16 g)=235 g
b) M 4 HNO3=4*(1 g+14 g+3*16 g)=252 g
Zadanie 3
a) M CaO=40 g/mol+16 g/mol=56 g/mol
56 g---1 mol
37 g---x mol
x=0,66 mol
b) M SO3=32 g/mol+3*16 g/mol=80 g/mol
80 g---1 mol
10 g---x mol
x=0,125 mol
Zadanie 4
a) M H2SO4=2*1 g/mol+32 g/mol+4*16 g/mol=98 g/mol
98 g---6,02*10^23 cząsteczek
490 g---x cząsteczek
x=30,1*10^23 cząsteczek
b) M Ca(OH)2=40 g/mol+2*16 g/mol+2*1 g/mol=74 g/mol
74 g---6,02*10^23 cząsteczek
350 g---x cząsteczek
x=28,47*10^23 cząsteczek
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Zadanie 1
a) M Br=80 g/mol
b) M Fe2O3=2*56 g/mol+3*16 g/mol=160 g/mol
c) M Se=79 g/mol
d) M Mn2O7=2*55 g/mol+7*16 g/mol=222 g/mol
Zadanie 2
a) M 5 HNO2=5*(1 g+14 g+2*16 g)=235 g
b) M 4 HNO3=4*(1 g+14 g+3*16 g)=252 g
Zadanie 3
a) M CaO=40 g/mol+16 g/mol=56 g/mol
56 g---1 mol
37 g---x mol
x=0,66 mol
b) M SO3=32 g/mol+3*16 g/mol=80 g/mol
80 g---1 mol
10 g---x mol
x=0,125 mol
Zadanie 4
a) M H2SO4=2*1 g/mol+32 g/mol+4*16 g/mol=98 g/mol
98 g---6,02*10^23 cząsteczek
490 g---x cząsteczek
x=30,1*10^23 cząsteczek
b) M Ca(OH)2=40 g/mol+2*16 g/mol+2*1 g/mol=74 g/mol
74 g---6,02*10^23 cząsteczek
350 g---x cząsteczek
x=28,47*10^23 cząsteczek