$mass \: of \: mgo \: = 20grams \\ mass \: of \: mg \: = 15grams \\ so \: from \: the \: law \: of \: conservation \: of \: mass \: = mass \: of \: o2 = (20 - 15)grams \: \\ = 5grams(ans)$

Hope it helps

4 0

3 years ago

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

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:

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

6 0

3 years ago

How many electrons can s,p,d,f hold?

oksian1 [2.3K]

s-orbital = 2 elec.

p-orbital = 6 elec.

d-orbital = 10 elec.

f-orbital = 14 elec.

7 0

4 years ago

Diffusion through the capillary walls allows ____.

Alex_Xolod [135]

Answer: oxygen to move from blood to body cells

Explanation:

5 0

2 years ago