10.4%
First, calculate the total mass by adding the masses together.
26.0 g + 225 g = 251 g
Now calculate the percentage of 251 that 26 is using division:
26 / 251 = 0.103585657 = 10.3585657%
So the mass percent of KCl is 10.4% (after rounding to 3 significant digits)
Answer:
The answer to your question is:
a) 2.5 mol of Fe
b) 5.63 mol of H2
c) 672 g of Fe2O3
Explanation:
a) Fe₂O₃(s) + 3H₂(g) → 2Fe + 3H₂O(l)
1 mol of Fe₂O₃ ------------- 2 mol of Fe
1.25 mol ------------- x
x = (1.25 x 2) / 1
x = 2.5 mol of Fe
b) Fe₂O₃(s) + 3H₂(g) → 2Fe + 3H₂O(l)
3 moles of H2 ---------------- 2 moles of Fe
x ---------------- 3.75 mol Fe
x = (3.75 x 3) / 2
x = 5.63 mol of H2
c) Fe₂O₃(s) + 3H₂(g) → 2Fe + 3H₂O(l)
1 mol of Fe2O3 ------------------ 3 moles of H2O
x ---------------- 12.5 moles of H2O
x = (12.5 x 1) / 3
x = 4.2 moles of Fe2O3
MW Fe2O3 = (2 x 56) + (16 x 3)
= 112 + 48
= 160 g
160 g Fe2O3 ----------------- 1 mol of Fe2O3
x ----------------- 4.2 moles of Fe2O3
x = (4.2 x 160) / 1
x = 672 g of Fe2O3
Answer:
No it will not have the same chemical properties as the initial substance.
Explanation:
In a chemical change, the atoms in the reactants rearrange themselves and bond together differently to form one or more new products with different characteristics than the reactants
Yes, size, density, etc. will change the heating rate :)
Thermal energy isconverted to gas energy