N = m/M = N/Na
n(O2) = 10/32 = 0,3125 моль
N(O2) = 0,3125*6,02*10²³ = 1,89*10²³ молекул
1)Ca+2H2O=Ca(OH)2+H2
2)H2+Cl2=2HCl
3)HCl+Zn=ZnCl2+H2
1.CH2CL-COOH +HCL
2.C17H35COOH
3.H3C-(CH2)7-CHBR-CHBR-(CH2)7-COOH
4.<span> [-CH2-CH(COOCH3)-]n </span>
N(O2)=m/M(M=2*16=32; ); m=M*n=192г=0,192 кг
n=V/Va (Va=22,4л); V=n*Va;V=134,4л=0,1344м^3
m=p(0)*V; p(0)=m/V; p(0)=1,42(кг/м^3)