Answer is: 3,2 · 10¹¹ t of quicklime.Â
Chemical reaction: COâ‚‚ + CaO → CaCOâ‚.
m(CO₂) = 2184,82·10¹² · 115 = 2,51 · 10¹ⷠg.
n(COâ‚‚) = m(COâ‚‚)Â Ă· M(COâ‚‚)
n(CO₂) = 2,51 · 10¹ⷠg ÷ 44 g/mol = 5,7 · 10¹ⵠmol.
from reaction n(COâ‚‚) : n(CaO) = 1 : 1.
n(CaO) = 5,7· 10¹ⵠmol.
m(CaO) = 5,7· 10¹ⵠmol · 56 g/mol = 3,2 · 10¹ⷠg = 3,2 ·
10¹¹ t.
n - amount of substance
Atomic mass Kr = 83.8 g/mole
Atomic mass Ar = 39.948 g/mole
So the ratio of the effusion rates = SQRT(83.8/39.948) = 1.45. Argon moves 45% faster than krypton!
Hope that helped!
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:
Carbon and phosphorus
Explanation:
The atoms of carbon and phosphorus are most likely to gain electrons from the given choices .
The reason for this is because, both carbon and phosphorus are non-metals. Most non-metals usually accept electrons.
Metals are usually electron donors .
- Metals are known for their electropositivity which is their ability to lose electrons.
- Non-metals are electronegative and will tend to have a strong affinity for electrons.
According to Dalton; All matter is made up of small particles called atoms.