Calcium carbonate, CaCO31s2, the principal compound in limestone, decomposes upon heating to CaO(s) and CO21g2. A sampleof CaCO3 is decomposed, and the carbon dioxide is collected in a 250-mL flask. After decomposition is complete, the gas has apressure of 1.3 atm at a temperature of 31 °C. How many moles of CO2 gas were generated?

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Equal volumes of propane, C 3H g, and carbon monoxide, CO, at the same temperature and pressure have the same O chemical properties. O number of atoms. average molecular speed. density. O number of molecules.

. Chlorine dioxide (ClO2) is used for bleaching wood pulp.In a gaseous sample held at thermal equilibrium at a particular temperature, 35.0% of the molecules have speeds exceeding 400 m s-1 . If the sample is heated slightly, will the percentage of molecules with speeds in excess of400 m s-1 then be greater than or less than 35%? Explain.

Lithium oxide is an effective absorber of carbon dioxide and can be used to purify air in confined areas such as space vehicles. What volume of carbon dioxide can be absorbed by 1.00 kg of lithium oxide at 25°C and 1.00 atm? Li2O(aq) + CO2(g) → Li2CO3(s)

At 60ᵒC, 3.76 mol of NOBris placed in a 1.00 L flask and it dissociates to the extent of 6.9%, Calculate the value of Kcfor the dissociation reaction: 2NOBr(g) 2NO (g) + Br2(g)

Consider the reaction below which was carried out at 200.0 K to produce liquid ammonia: N2(8) + 3H,(g) 2NH3() Suppose 37.3 g of N2 gas is mixed with 37.3 g of H2 gas. What is the volume (in units of liters) of gas remaining after the reaction is completed? The remaining gas was measured to have a temperature of 200.0 K and a pressure of 760.0 mmHg? molar mass of N2= 28.013 g/mol molar mass of H2 = 2.0158 g/mol. %3D Recall: Vo (1/P) (at constant Tand n) VaT (at constant P and n) Van (at constant Tand P) PV = nRT rate of effusion ox 1 atm 760 torr 760 mmHg %3D %3D R=8.31446 J K-1.r mol-1 R= 0.0820573L atm K-1. mol-1 %3D

When limestone (solid CaCO3) is heated, it decomposes into lime (solid CaO) and carbon dioxide gas. This is an extremely useful industrial process of great antiquity, because powdered lime mixed with water is the basis for mortar and concrete — the lime absorbs CO2 from the air and turns back into hard, durable limestone. Suppose some calcium carbonate is sealed into a limekiln of volume 550.L and heated to 700.0°C. When the amount of CaCO3 has stopped changing, it is found that 4.14kg have disappeared. Calculate the pressure equilibrium constant Kp this experiment suggests for the equilibrium between CaCO3 and CaO at 700.0°C. Round your answer to 2 significant digits.   Note for advanced students: it's possible there was some error in this experiment, and the value it suggests for Kp does not match the accepted value.

5. A 75.0 mL flask contains 0.1477 g of a volatile oxide of carbon. The pressure in the flask is 1281 mm Hg and the temperature is 19°C. Is the gas CO or CO2?

Using stoichiometry, calculate the volume of O2 gas at 1.25 atm and 18.0 ̊C, which forms when 10.5 g KClO3 decomposes according to the reaction:2 KClO3 → 2 KCl + 3 O2