As you look at the formula of ethanol, you can see 6 H’s. This means that one molecule of ethanol contains six hydrogen atoms. To determine the number of hydrogen atoms in one mole of ethanol, multiply the Avogadro’s number by 6.
N = 6 * 6.02 * 10^23 = 3.6 * 10^24
B is the correct answer.
6. What is the coefficient for H2SO4(aq) when the following equation is balanced, using the
smallest possible integers?
__Mg3N2(s) + __H2SO4(aq) → __MgSO4(aq) + __(NH4)2SO4(aq)
Mg3N2 + H2SO4 → MgSO4 + (NH4)2SO4
To balance the Mg’s, make 3 MgSO4.
Mg3N2 + H2SO4 → 3 MgSO4 + (NH4)2SO4
To balance the N’s, make 2 (NH4)2SO4
Mg3N2 + H2SO4 → 3 MgSO4 + 2 (NH4)2SO4
The right side of this equation has four sulfate ions and eight hydrogen atoms. To balance this equation, make four sulfuric acids.
Mg3N2 + 4 H2SO4 → 3 MgSO4 + 2 (NH4)2SO4
C is the correct answer. I hope this is helpful for you.