(i) State the law of constant proportion.(ii) In a compound carbon and

1.	(i) State the law of constant proportion.(ii) In a compound carbon and oxygen react in a ratio 3 : 8 by mass to form carbon dioxide. What mass of oxygen is required to repeat to react completely with 9 g carbon?
Answer» (i) Law of constant proportion states that, “a pure chemical compound always consists of the same elements that are combined together in a fixed (or definite) proportion by mass”. Carbon and oxygen reacts in a ratio 3:8 by mass to form Carbon dioxide Hence the required reaction is: C + O₂ → CO₂ Carbon: Oxygen = 3 : 8 \(\therefore\) 9 g of carbon require (3 x 8) 24 g of oxygen to form carbon dioxide.

(i) State the law of constant proportion.(ii) In a compound carbon and oxygen react in a ratio 3 : 8 by mass to form carbon dioxide. What mass of oxygen is required to repeat to react completely with 9 g carbon?

Answer»

(i) Law of constant proportion states that, “a pure chemical compound always consists of the same elements that are combined together in a fixed (or definite) proportion by mass”.

Carbon and oxygen reacts in a ratio 3:8 by mass to form Carbon dioxide

Hence the required reaction is:

C + O₂ → CO₂

Carbon: Oxygen = 3 : 8

\(\therefore\) 9 g of carbon require (3 x 8) 24 g of oxygen to form carbon dioxide.

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(i) State the law of constant proportion.(ii) In a compound carbon and oxygen react in a ratio 3 : 8 by mass to form carbon dioxide. What mass of oxygen is required to repeat to react completely with 9 g carbon?

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