1. State the two laws of chemical combinations. 2. Can there be a variation in chemical composition of two samples of pure water taken from two different places? Explain. 3. If 3g of carbon burns in 8g oxygen to produce 11g of carbon dioxide. Then how much carbon dioxide will be produced if 12g of carbon is burnt in 32g of oxygen? Which law of chemical combination will govern your answer? 4. Which elements are involved in the formation of Ammonia and Carbon dioxide?
Answers
Answer:
This is governed by the law of definite proportion. Carbon and oxygen combine in 3:8 ratio. So 11 g of carbon dioxide is formed.
Hence, in the latter case too, only 8 g of O
2
will be reacted with 3g of carbon (because carbon is the limiting reagent here ) to form 11g of CO
2
and 42 g of oxygen will remain unreacted.
Answer:
1 elements and compounds
2 no there will be any variation in the chemical composition of two samples of pure water taken from to different places
3 when 3 gm of carbon is burnt in 8 g of oxygen we get 11 g of Co2.Hence, through 3g of carbon is burnt in 50g of oxygen,it will react with 8g of oxygen only to form 11g of carbon dioxide.This is accordance with law of constant proportions
4 one nitrogen gas molecules react with three hydrogen gas molecules over finally divided as a catalyst to produce to ammonia molecules and carbon dioxide is a chemical compound composed of one carbon and two oxygen atoms