Answer:
9. C₆H₁₂ + 9O₂ = 6CO₂ + 6H₂O
Number of moles of C₆H₁₂
[tex] = \frac{4.05 \times 10 ^{20} }{6.02 \times 10 ^{23} } [/tex]
[tex] = 6.73 \times 10 ^{ - 4} mol[/tex]
*avogadro constant= 6.02×10^23
From the equation,
1 mol C₆H₁₂ : 6 mol CO₂
6.73×10^-4 mol C₆H₁₂ : 4.038×10^-3 mol CO₂
Number of moles of CO₂ = 4.038×10^-3 mol
10. (a) X+4(-2)=-2 X=+6
Oxidation state of Mo= +6
(b) X+1=0 X=-1
Oxidation state of H= -1
(c) 2X+3(-2)=0 X=+3
Oxidation state of Cr= +3
(d) 2X+3(-2)=-2 X=+2
Oxidation state of S= +2
