please. i really need help. thanks so much. 
1. 1.0 parts methane reacts with 4.0 parts oxygen to produce carbon dioxide. Use the mass ration to calculate how much carbon dioxide is formed with 42g carbon using this reaction.
2. A sample of an oxide of tin with the formula SnO consists of 0.743g tin and 0.100g oxygen. A sample of a second oxide of tin consists of 0.555g tin and 150g oxygen. what is the formula of the second oxide?
thanks so much!
1. 1.0 parts methane reacts with 4.0 parts oxygen to produce carbon dioxide. Use the mass ration to calculate how much carbon dioxide is formed with 42g carbon using this reaction.
2. A sample of an oxide of tin with the formula SnO consists of 0.743g tin and 0.100g oxygen. A sample of a second oxide of tin consists of 0.555g tin and 150g oxygen. what is the formula of the second oxide?
thanks so much!