Emissions from the burning of fossil fuels are often reported as gigatons ( Gt ) of carbon. In a calendar year, China emitted 2.9  Gt  of carbon while the Unites States released 1.5  Gt  of carbon. To what mass in gigatons of CO2CO2 do these amounts of carbon correspond?

Catalytic converters are the most common option for controlling emissions of polluting gases by internal combustion engines in automobiles, accelerating the conversion of nitrogen oxides into nitrogen and oxygen gases. A chemical reaction that can be used for the conversion of nitric oxide into non-polluting gases is the reaction of this gas with hydrogen, resulting in nitrogen and water gases, as shown in the chemical equation below: 2 NO(g) + 2 H2(g) → N2(g) + H2O(g) The kinetics of this reaction at a temperature of 1250 °C is represented in the following table, which indicates the influence of the concentration of the reactants on the reaction rate, obtained through three experiments conducted under the same conditions EXPERIMENTO [NO] (MOL/L) [H2] (MOL/L) V0 (MOL/Ls) 1 0,20 0,08 0,05 2 0,40 0,08 0,20 3 0,40 0,16 0,40 Determine the rate law for this chemical reaction, the rate constant, and its respective unit. Calculate the rate when the concentration of NO is 0.30…

Butane gas, C4H10, is a common fuel found in cigarette lighters. When butane burns, it combines with oxygen gas to produce carbon dioxide gas and water vapor. A student burned a 5.00 g sample of butane. the question you have to answer is: Calculate the total mass of the reactants and compare it to the total mass of the products from reacting 5.00 g of butane.

You are given a crushed sample that is a mixture of limestone (calcium carbonate), lime (calcium oxide), and sand. The calcium carbonate, or limestone, is the only material present in the mixture that will decompose when heated. You subject a 6.0685 g sample of the mixture to strong heating and after the sample reaches constant mass (no more mass is lost with additional heating), the sample has a final weight of 3.9247 g. What is the percentage of calcium carbonate present in the original mixture? (MW of calcium carbonate = 100.1 g/mol) Equation for reaction = CaCO3(s) -> CaO(s) + CO2(g).