Question

chalk contains 3% of carbon , 10% of calcium and 12% of oxygen. Find the amount in grams of each of these substances in 1 kg of chalk​

Answer 1

Answer:

Content of carbon = 30g

Content of calcium = 100g

Content of oxygen = 120g

Step-by-step explanation:

Given:

• Weight of chalk is 1kg.

• Content of carbon = 3%

• Content of calcium = 10%

• Content of oxygen = 12%

To Find:

→ Amount in grams for each of these components.

Procedure:

Finding Amounft of Carbon :-

Content of carbon = 3% of 1000

$\sf \implies \: \dfrac{3}{100} \times 1000$

$\implies \sf \: 30g$

Finding amount of calcium used :-

Calcium content = 10% of 1000

$\sf \implies \: \dfrac{10}{100} \times 1000$

$\implies \sf \: 100g$

Finding amount of oxygen :-

oxygen content = 12% of 1000

$\implies \sf \: \dfrac{12}{100} \times 1000$

$\implies \sf 120g$

What you need to know?

• Percentage is a form of expressing an entity in per 100 form.

• The sign for percent is (%)

• This literally means, some entity/100.

Answer 2

Answer:

120 gram

it will help in the question