5 kg is equal to how much in grams?

Q. A bag contains 5 rupee coins, each weighing 25 gram. How much money does the bag contain, if the bag weighs 2 kg 475 grams?

Q. How much water in gram will be formed when an electric spark is sent to a mixture of 5 grams of hydrogen and 50 g of oxygen? How much oxygen will be left unreacted?

Q. How many grams should be added to $2$kg $300$g to make it $5$kg $68$g ?

Q. How much gram(s) equal(s) 10 miligrams?

Q. How much gram(s) equal(s) 200 miligrams?