Question

The table shows the percentage of carbon dioxide in the Earth’s atmosphere in the years 1800 and 2013. Calculate the difference in the mass of carbon dioxide in 500 kg of air in 2013 compared to 1800. Select the correct answer.

Answer 1

The difference in the mass of carbon dioxide in 500 kg of air in 2013 compared to 1800 is 0.06 Kg

Data obtained from the question

• Year 1800 percent = 0.028%
• Year 2013 percent = 0.040%
• Mass of air = 500 Kg
• Difference =?

How to determine the mass of CO₂ in 500 Kg in year 1800

• Year 1800 percent = 0.028%
• Mass of air = 500 Kg
• Mass of CO₂ =?

Mass = percent × mass of air

Mass of CO₂ = 0.028% × 500

Mass of CO₂ = 0.14 Kg

How to determine the mass of CO₂ in 500 Kg in year 2013

• Year 1800 percent = 0.040%
• Mass of air = 500 Kg
• Mass of CO₂ =?

Mass = percent × mass of air

Mass of CO₂ = 0.040% × 500

Mass of CO₂ = 0.2 Kg

How to determine the difference

• Mass of CO₂ in year 1800 = 0.14 Kg
• Mass of CO₂ in year 2013 = 0.2 Kg
• Difference =?

Difference = mass in 2013 - mass in 1800

Difference = 0.2 - 0.14

Difference = 0.06 Kg

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