b) d_A/H2=\(\dfrac{M_A}{M_{H2}}=\dfrac{M_A}{2}=8,5\)

=>M_A=8,5.2=17g/mol

CTDC:N_xH_y

m_N=\(\dfrac{82,35.17}{100}\)=14(g)

m_H=\(\dfrac{17,65.17}{100}\)=3(g)

=>n_N=\(\dfrac{14}{14}\)=1(mol)

=>n_H=\(\dfrac{3}{1}\)=3(mol)

Trong phân tử có 1 nguyên tử N,3 nguyên tử H

=>CTHH: NH₃

a) CTDC: NA_xC_yO_z

m_Na=\(\dfrac{46,4.106}{100}\)=46,004(g)

m_C= \(\dfrac{11,3.106}{100}\)= 12(g)

m_O=\(\dfrac{15,3.106}{100}\)=48,01(g)

=>n_Na=\(\dfrac{46,004}{23}\)=2(mol)

=>n_C=\(\dfrac{12}{12}\)=1(mol)

=>n_O=\(\dfrac{48,01}{16}\)=3(mol)

Trong phân tử có 2 nguyên tử Na,1 nhuyên tử C,3 nguyên tử O

=>CTHH: Na₂CO₃