How many moles of water will be produced when 15.0 g of calcium chloride dihydrate are heated ?

0.204 mol

Explanation:

Step 1: Write the balanced equation for the heating of calcium chloride dihydrate

CaCl₂.2H₂O ⇒ CaCl₂ + 2H₂O

Step 2: Calculate the moles of calcium chloride dihydrate

The molar mass of CaCl₂.2H₂O is 147.01 g/mol. The moles corresponding to 15.0 g of CaCl₂.2H₂O are:

Step 3: Establish the molar ratio of CaCl₂.2H₂O to H₂O

According to the balanced equation, the molar ratio of CaCl₂.2H₂O to H₂O is 1:2.

Step 4: Use the molar ratio to calculate the moles of water produced from 0.102 moles of calcium chloride dihydrate

1 is the answer to this problem

c is having 4 valence electrons and is bonded to three hydrogens and one sulphur atom, therefore, the number of bond pair is equal to four. as all the valence electrons are used in forming the bonds so, there is no lone pair left on carbon.

s is having 6 valence electrons and is bonded to one other sulfur atom and one carbon atom, therefore, the number of bond pair is equal to 2. as only two valence electrons are used in forming the bonds so, four electrons are left. therefore, two lone pairs are present on s.