Explain why nitrogen dioxide in the atmosphere is a problem.
Carbon dioxide absorbed by the oceans causes ocean acidification. Explain one environmental problem caused by ocean acidification.
The pie chart shows different sources of emissions of methane.
Calculate the percentage emissions of methane from wastewater treatment. Percentage emissions from wastewater treatment = _____________ %
What is the largest source of emissions of methane?
In a coal-fired power station's flue-gas desulfurization unit, calcium carbonate slurry is used to remove sulfur dioxide from the exhaust gases, producing calcium sulfate and carbon dioxide.
This is the balanced equation for the reaction that takes place: 2CaCO3+2SO2+O2→2CaSO4+2CO22\text{CaCO}_3 + 2\text{SO}_2 + \text{O}_2 \rightarrow 2\text{CaSO}_4 + 2\text{CO}_22CaCO3+2SO2+O2→2CaSO4+2CO2
During a period of operation, 13.613.613.6 tonnes of calcium sulfate is made.
Calculate the mass of sulfur dioxide removed from the exhaust gases.
Relative atomic mass (ArA_rAr): Ca=40.0\text{Ca} = 40.0Ca=40.0, S=32.0\text{S} = 32.0S=32.0, O=16.0\text{O} = 16.0O=16.0. Mass of sulfur dioxide = _____________ tonnes