State the law of constant proportions. Using this law, calculate the mass of carbon that is required to combine with 6.4g of O2 to form carbon dioxide. Mass ratio of Carbon and Oxygen in CO2 is 3:8.
Answers
Answer:
law of constant proportion states that every compound in the universe are composed in a simple whole no. ratio
Given - Mass ratio of Carbon and Oxygen in CO2 is 3:8.
Mass of oxygen - 6.4 gram
Find - Mass of carbon
Solution - Let us say the masses of carbon and oxygen to be 3x and 8x respectively.
So, as per given information, 8x oxygen combines with 3x carbon.
Hence, 6.4 gram oxygen will combine with amount of carbon = 3x*6.4/8x
6.4 gram oxygen will combine with carbon = 2.4 gram of carbon
Thus, mass of carbon required to combine with 6.4g of oxygen is 2.4 gram.
As per the law of constant proportions, the chemical compound always consists of its constituent elements in fixed ratio and this ratio is independent of method and source of preparation.