Question

if 240gm.of ethane is burnt in excess of oxygen how many grams of water are formed​

Answer 1

Explanation:

Molar mass of calcium, Ca = 40g

Given Mass of the calcium = 240g

As we know that, Number of moles = mass of an element/molar mass of an element

Hence Number of moles of Calcium = 240g/40g = 6 moles.

Molar mass of magnesium, Mg = 24g

Given Mass of the magnesium, Mg = 240g

As we know that, Number of moles = mass of an element/molar mass of an element

Hence Number of moles of magnesium = 240g/24g = 10 moles.

From above calculation, the molar ratio can be inferred - 6:10 = 3:5

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