Answer:
285 g of P₄
Explanation:
Let's consider the following balanced equation.
2 Ca₃(PO₄)₂ + 6 SiO₂ + 10 C → 6 CaSiO₃ + P₄ + 10 CO
We know the following relations:
- 100 g of phosphorite contain 75 g of Ca₃(PO₄)₂
- 2 moles of Ca₃(PO₄)₂ produce 1 mole of P₄
- The molar mass of Ca₃(PO₄)₂ is 310 g/mol
- The molar mass of P₄ is 124 g/mol
Then, for 1.9 kg of phosphorite:

For ideal gases at constant volume, you can use the law of Gay - Lussac:
P / T = constant => P1 / T1 = P2 / T2
=> P2 = T2 * P1 / T1
And remember you have to use absolute scale of temperature.
T1 = 25 + 273.15 = 298.15 K
T2 = 475 + 273.15 = 748.15 K
=> P2 = 748.15 K * 1.8 atm / 298.15 K = 4.5 atm
Answer: 4.5 atm
Answer:
Iron, nickel and cobalt are the most common magnetic elements.
Boyle’s law, also referred to as the Boyle-Marriott law, or Mariotte’s law ( especially in France), is experimental gas law that describe how pressure of a gas tends to increase as the volume of the container decreases.