Answer:
Theoretical yield: 13.9 g
Percent yield: 94 %
Explanation:
The reaction is:
CaCO₃ → CaO + CO₂
We see that the reaction is correctly balanced.
1 mol of calcium carbonate can decompose to 1 mol of calcium oxide and 1 mol of carbon dioxide.
We convert the mass to moles: 24.8 g . 1mol / 100.08g = 0.248 moles
As ratio is 1:1, 0.248 moles of salt can decompose to 1 mol of oxide.
We convert the moles to mass: 0.248 mol . 56.08g /1mol = 13.9 g
That's the theoretical yield.
To determine the percent yield we think:
(Determined yield / Theoretical yield) . 100 → (13.1 / 13.9) . 100 = 94 %
Answer:
2, 3, 1, 6.
Explanation:
2H3PO4 + 3Mg(OH)2 --> Mg3(PO4)2 + 6H2O
This is a neutralisation reaction because it is the reaction between acid and base to give a salt and water.
The RHS is the first to be balanced, Mg atom is first balanced, followed by the P atom.
This is because the excess O and H atoms can be balanced on the LHS.
Answer:
1.24 × 10²⁵ molecules of oxygen gas
Explanation:
Step 1: Given data
Moles of oxygen gas: 20.6 moles
Step 2: Calculate the number of molecules present in 20.6 moles of oxygen gas
In order to convert moles to molecules, we need a conversion factor. In this case, we will use Avogadro's number: there are 6.02 × 10²³ molecules in 1 mole of molecules.
20.6 mol × 6.02 × 10²³ molecules/1 mol = 1.24 × 10²⁵ molecules
Answer:
Explanation:
1. Boron nitride is prepared synthetically in lab.
2. When ammonia is treated with boric acid or boron trioxide boron nitride is prepared.This are the other reaction to produce boron nitride.
3. B
2
O
3
+2NH
3
→2BN+3H
2
O (T = 900 C)
4. B(OH)
3
+NH
3
→BN+3H
2
O (T = 900 C)
5. B
2
O
3
+CO(NH
2
)
2
→2BN+CO
2
+2H
2
O (T > 1000 C)
6. B
2
O
3
+3CaB
6
+10N
2
→20BN+3CaO (T > 1500 C)
Properties of Boron nitride :
1. Boron nitride is ionic in nature hence it reduces he co valency and electrical conductivity.
2. Hexa-boron nitride is thermally stable.1. Boron nitride is prepared synthetically in lab.
2. When ammonia is treated with boric acid or boron trioxide boron nitride is prepared.This are the other reaction to produce boron nitride.
3. B
2
O
3
+2NH
3
→2BN+3H
2
O (T = 900 C)
4. B(OH)
3
+NH
3
→BN+3H
2
O (T = 900 C)
5. B
2
O
3
+CO(NH
2
)
2
→2BN+CO
2
+2H
2
O (T > 1000 C)
6. B
2
O
3
+3CaB
6
+10N
2
→20BN+3CaO (T > 1500 C)
Properties of Boron nitride :
1. Boron nitride is ionic in nature hence it reduces he co valency and electrical conductivity.
2. Hexa-boron nitride is thermally stable.
Answer:
I Think It's The Second One
Tell Me If I'm Wrong