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NTA Abhyas 2020
Exam
NTA Abhyas
Year
2020
Subject
Chemistry
Chapter
Redox Reactions

NTA Abhyas 2020 · Chemistry · Redox Reactions

Calculate the amount of calcium oxide (in grams) required when it...

Calculate the amount of calcium oxide (in grams) required when it reacts with 852 g of P4O10.

Correct answer

1008

Step-by-step solution

6CaO+P4O10⟶2Ca3(PO4)26 \text{CaO} + {\text{P}}_{4} {\text{O}}_{1 0} ⟶ 2 {\text{Ca}}_{3} {\left({\text{PO}}_{4}\right)}_{2}
1 Mole P4O10 = 284 g/mole
Moles of P4O10 = 852284\dfrac{8 5 2}{2 8 4} = 3 moles
Moles of CaO = 18 moles
Mass of CaO = 18 x 56 = 1008 g
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