Question

pls solve and tell this ​

Answer 1

answer is 24 g of oxygen is required .

explanation

hydrogen : oxygen = 1 : 8

so if hydrogen is increased to 3g , oxygen should also be increased by multiplying 8 by 3

so that it will become 3 : 3×8 = 3 : 24

hence it is clear that 24g is needed

I HOPE YOU GET IT

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Answer 2

$\huge\fcolorbox {magenta} {red} {Hey my Nandini here is the answer}$

Hydrogen and oxygen combine in the ratio of 1:8 by mass to form water.

Now,

For every 1 g of Hydrogen, 8 g of oxygen is needed for the reaction to take place.

Therefore, for 3 g of Hydrogen, the mass of oxygen needed = 8 * 3 = 24 g.

Hence, 24 g of Oxygen is needed to complete reaction with 3 g of Hydrogen.