Answer:
C. 3 and 4
Explanation:
Count H's in formula (each has 4)
- Hope that helped! Please let me know if you need a further explanation.
Change(A chemical reaction.)
Answer:
150g
Explanation:
Assuming they are ideal gases at the same temperature and pressure, equal moles of gasses have equal volume. IN this case, if we have 10g of hydrogen gas, that is 5 moles of H2 gas. That means 5 moles og NO2 will occupy the same volume which is 5*(14.0 + 16.0*2) = 230 g
First, we have to balance the equation:
Al + H2SO4 → Al2(SO4)3 + H2
we have the number of Al atoms not equal on both sides so we will put 2 Al instead of Al on the left side of the equation.
2Al + H2SO4 → Al2(SO4)3 + H2
now we have an unequal number of (SO4) group on both sides of the equation so we put 3H2SO4 instead of H2SO4
2Al + 3H2SO4 → Al2(SO4)3 + H2
now, we have to put 3H2 instead of H2 to make the H atoms equals on both sides.
2Al + 3H2SO4 → Al2(SO4)3 + 3H2 this is the final balanced equation.
∴ the coefficient of H2SO4 is 3
The theoretical yield : = 28.34 g Al₂O₃
<h3>Further explanation</h3>
Given
15 g of Aluminum react
Required
The theoretical yield
Solution
Reaction
4Al(s) + 3O₂ (g)⇒ 2Al₂O₃(s)
mol of Aluminum :
mol = mass : Ar Al
mol = 15 g : 26.98 g/mol
mol = 0.556
From the equation, mol ratio of Al : Al₂O₃ = 4 : 2, so mol Al₂O₃ :
= 2/4 x mol Al
= 2/4 x 0.556
= 0.278
Mass Al₂O₃ :
= mol x MW Al₂O₃
= 0.278 x 101.96
= 28.34 g
