Question

If 3 grams of Oxygen react completely with Magnesium to form 7g of MgO. What mass of Oxygen is required for 10 g of Magnesium.

Answer 1

7gm of Mg is produced from 3gm of oxygen

then 1gm Mg is produced from 3/7gm of oxygen

then,

10 grams of Mg will be produced from 3/7×10 =4.2gm of Oxygen

Answer 2

Answer:

Explanation:

if 3g o2 became 7mg mgo means

10/7=1.422

and then add 3 for o2

it will bacome 3+1.422=4.422