Question

Q.chalk contains 10% calcium, 3% carbon dioxide and 12% oxygen.find the amont of carbon and calcium (in grams) in 2.5 kg of chalk.​

Answer 1

${\small{\bold{\purple{\underline{Given}}}}}$

Chalk contains 10% calcium, 3% carbon dioxide and 12% oxygen.find the Amount of carbon and calcium (in grams) in 2.5 kg of chalk.

___________________________________

$\sf \: We \: Have,$

➙Percentage of calcium in chalk = 10%

➙Percentage of carbon in chalk = 3%

➙Percentage of oxygen in chalk = 12%

⟶ Weight of chalk = 2 1/2 kg

$\longrightarrow \: \frac{5}{2} \sf \: kg \ \\ \longrightarrow \sf2.5 \sf \: kg \: \times 1000 \sf \: g \\ \longrightarrow \sf \: 2500g$

➙Amount Of Of Carbon In Chalk = 3% Of 2500g

$\longrightarrow \sf \: \frac{3}{100} \times 2500 \\ \longrightarrow \sf \: 25 \times 3 \\ \longrightarrow \sf \: 75g$

➙Amount of calcium in chalk = 10% of 2500 g

$\longrightarrow \sf \: \frac{10}{100} \times 2500 \\ \longrightarrow \sf10 \times 25 \\ \longrightarrow \sf \ \: 250g$

➤Hence, amount of carbon and calcium are 75 g and 250 g respectively.

Answer 2

Answer:

Given

Chalk contains 10% calcium, 3% carbon dioxide and 12% oxygen.find the Amount of carbon and calcium (in grams) in 2.5 kg of chalk.

___________________________________

\sf \: We \: Have,WeHave,

➙Percentage of calcium in chalk = 10%

➙Percentage of carbon in chalk = 3%

➙Percentage of oxygen in chalk = 12%

⟶ Weight of chalk = 2 1/2 kg

\begin{gathered} \longrightarrow \: \frac{5}{2} \sf \: kg \ \\ \longrightarrow \sf2.5 \sf \: kg \: \times 1000 \sf \: g \\ \longrightarrow \sf \: 2500g\end{gathered}

⟶

2

5

kg

⟶2.5kg×1000g

⟶2500g

➙Amount Of Of Carbon In Chalk = 3% Of 2500g

\begin{gathered} \longrightarrow \sf \: \frac{3}{100} \times 2500 \\ \longrightarrow \sf \: 25 \times 3 \\ \longrightarrow \sf \: 75g\end{gathered}

⟶

100

3

×2500

⟶25×3

⟶75g

➙Amount of calcium in chalk = 10% of 2500 g

\begin{gathered} \longrightarrow \sf \: \frac{10}{100} \times 2500 \\ \longrightarrow \sf10 \times 25 \\ \longrightarrow \sf \ \: 250g\end{gathered}

⟶

100

10

×2500

⟶10×25

⟶ 250g

➤Hence, amount of carbon and calcium are 75 g and 250 g respectively.

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Step-by-step explanation:

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