1. The plate boundary that is moving away to each other is called .
2-4 What are the diff. types of plate boundary. 5. What is formed in Continental to Continental plate boundary? 6-8. What are the types of convergent plate boundary? 9-10. What are the effect of Transform plate boundary? 11. the plate boundary that is sliding past each other is called?
12. What is formed in the oceani-oceanic type of divergent plate boundary? 13. A process where the earths crustal plte slides down under one plate and melts is called__. 14. What is formed in the oceanic-oceanic plate type of convergent boundary? 15. What do you call to the plate that moves towards each others?

Percentage composition of a compound is a ratio of an amount of each element to the total amount of individual elements in a compound, which is then multiplied with 100. Let us take an example of H2O i.e. Water. Water has 2 molecules of hydrogen, and one mole of water is of 18.0152 grams. And one mole of a hydrogen atom is of 1.008 grams. So, 2 hydrogen moles weighs 2.016 grams. Hence, one mole of water has 2.016 grams of hydrogen mole. Therefore, the percentage composition of hydrogen would be 2.016/18.0152 = 11.19%. Now let us study in detail about Percentage composition and its formula.