Mercury (Hg) is present in trace amounts in coal, ranging from 50.0 to 200.0 ppb. A typical power plant burns 1.49 million tons of coal per year. Calculate tons of mercury in the coal based on the lower (50.0 ppb) and higher (200.0 ppb) concentrations. Mercury at 50.0 ppb tons Hg Mercury at 200.0 ppb = tons Hg

A gas balloon has a volume of 82.28 liters when the temperature is 40.9 °C and the pressure is 799.3 mmHg. What would its volume be at 24.3 °C and 575.5 mmHg? Give your answer in L to the tenths place. Do not put units in the answer space.

Combining 0.304 mol Fe2O30.304 mol Fe2O3 with excess carbon produced 11.6 g Fe.11.6 g Fe. Fe2O3+3C⟶2Fe+3COFe2O3+3C⟶2Fe+3CO What is the actual yield of iron in moles? What is the theoretical yield of iron in moles? What is the percent yield?

The energy released from fission is about 200 MeV per fission event or 3.2-10-11 J per 235U nucleus. The fission of 1 g of 235U generates about 1 MW of thermal power; thus, a reactor that contains 1 kg of 235U fuel generates about 1 GW (109 W). If the reactor core is immersed in a heat bath containing 8.7.105 liters of water (12 m x 6 m x 12 m) initially at 25°C, how long will it take for the water to begin to boil off? Assume that the heat capacity of water is constant and that there is no heat lost from the reactor coolant to the surroundings.