After 6 g of carbon is completely burnt in anatmosphere of 40 g of oxy

1.	After 6 g of carbon is completely burnt in anatmosphere of 40 g of oxygen, the percentageoxygen left is:1. 802. 603. 404. 20
Answer» Answer:2) 60%Explanation:Gram molecular wight of carbon = 12gms 12 gms of carbon =1 mole carbon Therefore, 6 gms of carbon = 0.5 moles of carbon Gram molecular weight of oxygen = 32 gms 1 mole of oxygen = 32 gms The chemical reaction between carbon and oxygen is as follows: C + O₂ = CO₂ i.e 1 mole of carbon will react with 1 mole of oxygen => 0.5 mole of carbon will react with 0.5 mole of oxygen hence oxygen consumed in the reaction = 0.5 mole = 16 gms so oxygen left = 40 - 16 = 24 gms % of oxygen left = 24 x 100/40 = 60% Hence 60% of oxygen will be left. answers is 40 that's the right answers I muss say

After 6 g of carbon is completely burnt in anatmosphere of 40 g of oxygen, the percentageoxygen left is:1. 802. 603. 404. 20

Answer»

Answer:2) 60%Explanation:Gram molecular wight of carbon = 12gms

12 gms of carbon =1 mole carbon

Therefore, 6 gms of carbon = 0.5 moles of carbon

Gram molecular weight of oxygen = 32 gms

1 mole of oxygen = 32 gms

The chemical reaction between carbon and oxygen is as follows:

C + O₂ = CO₂

i.e 1 mole of carbon will react with 1 mole of oxygen

=> 0.5 mole of carbon will react with 0.5 mole of oxygen

hence oxygen consumed in the reaction = 0.5 mole = 16 gms

so oxygen left = 40 - 16 = 24 gms

% of oxygen left = 24 x 100/40 = 60%

Hence 60% of oxygen will be left.

answers is 40 that's the right answers I muss say