Answer:
Mass = 0.610 g
Explanation:
Given data:
Mass of Na₂SiO₃ = ?
Mass of HF = 0.800 g
Solution:
Chemical equation:
Na₂SiO₃ + 8HF → H₂SiF₆ + 2NaF + 3H₂O
Number of moles of HF:
Number of moles = mass/ molar mass
Number of moles = 0.800 g/ 20 g/mol
Number of moles = 0.04 mol
Now we will compare the moles of HF and Na₂SiO₃.
HF : Na₂SiO₃
8 : 1
0.04 : 1//8×0.04 = 0.005
Mass of Na₂SiO₃:
Mass = number of moles × molar mass
Mass = 0.005 mol × 122.07 g/mol
Mass = 0.610 g
The percentage yield obtained from the given reaction above is 74.8%
<h3>Balanced equation </h3>
P₄ + 6Cl₂ → 4PCl₃
Molar mass of P₄ = 31 × 4 = 124 g/mol
Mass of P₄ from the balanced equation = 1 × 124 = 124 g
Molar mass of PCl₃ = 31 + (35.5×3) = 137.5 g/mol
Mass of PCl₃ from the balanced equation = 4 × 137.5 = 550 g
<h3>SUMMARY</h3>
From the balanced equation above,
124 g of P₄ reacted to produce 550 g of PCl₃
<h3>How to determine the theoretical yield </h3>
From the balanced equation above,
124 g of P₄ reacted to produce 550 g of PCl₃
Therefore,
79.12 g of P₄ will react to produce = (79.12 × 550) / 124 = 350.9 g of PCl₃
<h3>How to determine the percentage yield </h3>
- Actual yield of PCl₃ = 262.6 g
- Theoretical yield of PCl₃ = 350.9 g
Percentage yield = (Actual /Theoretical) × 100
Percentage yield = (262.6 / 350.9) × 100
Percentage yield = 74.8%
Learn more about stoichiometry:
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Answer:
iron have magnetic features which connects with magnets. That's why it's used to visualise
Answer:
Of course it's C
Red planet
Explanation:
It is because the soil on Mars is rich of Fe (Iron).
That makes the soil look red.
Even on our planet we have such this places like hormuz island in Iran.
