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Hitman42 [59]
3 years ago
6

How are organising my time?

Chemistry
1 answer:
igomit [66]3 years ago
3 0

well for a start you need to learn how to type correctly then you have to plan out your schedule to what you can handle. :)  

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They are all physical exept c

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phosporus can be prepared from calcium phosphate by the following reaction: 2Ca3(PO4)2+6SiO2+10C → 6CaSiO3+P4+10CO Phosphorite i
morpeh [17]

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

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  • 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:

1900g(phosphorite).\frac{75gCa_{3}(PO_{4})_{2}}{100g(phosphorite)} .\frac{1molCa_{3}(PO_{4})_{2}}{310gCa_{3}(PO_{4})_{2}} .\frac{1molP_{4}}{2molCa_{3}(PO_{4})_{2}} .\frac{124gP_{4}}{1molP_{4}} =285gP_{4}

6 0
3 years ago
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