Question

In a stick of chalk, carbon is 3g, what is the weight of the chalk stick

Answer 1

Answer:

the wwight of the chalk stick is 25grams 3g+12g+10g= 25g

Answer 2

$\huge\sf{Solution}$

From the question it is given that,

The ratio of calcium, carbon and oxygen in chalk = 10: 3: 12

So, total part = 10 + 3 + 12 = 25

In that total part amount of carbon = 3/25

Then,

Percentage of carbon = (3/25) × 100

= 3 × 4

= 12 %

_________________________

Weight of carbon in the chalk = 3g

Let us assume the weight of the stick be x

Then,

12% of x = 3

(12/100) × (x) = 3

X = 3 × (100/12)

X = 1 × (100/4)

X = 25g

∴The weight of the stick is 25g.