Răspuns:
1.
MSO2=32+2×16=64g/mol
MS=32g/mol
32g 64g
S + O2 ⇒ SO2
320g xg
x=320×64/32=calculeaza
2.
12g 44g
C + O2 ⇒ CO2
240g xg
MC=12g/mol
MCO2=12+2×16-44g/mol
x=240×44/12=calculeaza
3.
28g 2×30g
N2 + O2⇒ 2NO
280g yg
MN2=2×14=28g/mol
MNO=14+16=30g/mol
y=280×2×30/28=calculeaza
Explicație: