Some Basic Concepts of Chemistry - Result Question 31

####31. Calculate the amount of calcium oxide required when it reacts with $852 g$ of $P _4 O _{10}$.

(2005, 2M)

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Solution:

  1. In a neutral atom, atomic number represents the number of protons inside the nucleus and equal number of electrons around it. Therefore, the number of total electrons in molecule of $CO _2$ $=$ electrons present in one carbon atom

$=6+2 \times 8=22$.

$+2 \times$ electrons present in one oxygen atom



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