Question

A and B react in ratio of 3 : 8 by mass. What weight of A should be used to react completely with
24 g B?​

Answer 1

Answer:

C+O2-->CO2

Carbon Oxygen=3:8

Carbon-->9g

O2=?

C:O2=3:8

9:O2=3:8

9/O2=3/8

Mass of Oxygen required

=9/3×8

=3×8

=24g

Hope it helps you ☺️☺️

Answer 2

Thus 9 grams of A reacts with B completely.

Given:

A and B react in the ratio of 3: 8 by mass.

To find:

The weight of A should be used to react completely with 24 grams of B.

Solution:

To determine the weight of A we have to follow the below steps as follows-

A and B react in the ratio of 3: 8 by mass.

Let 3x of A reacts with 8x of B completely.

Given that 24 grams of B react.

So, we can write as follows-

$8x = 24 \\ x = 3$

The value of x is 3.

Thus 3×3= 9 grams of A reacts with B completely.

Thus 9 grams of A reacts with B completely.

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