Hydrogen is prepared commercially by the reaction of methane and water vapor at elevated temperatures. CH4(g) + H2 O(g) ⇌ 3H2(g) + CO(g)What is the equilibrium constant for the reaction if a mixture at equilibrium contains gases with the following concentrations: CH4, 0.126 M; H2O, 0.242 M; CO, 0.126 M; H2 1.15 M, at a temperature of 760 °C?

275 mL of an aqueous solution containing 0.870 g of an unknown molecular compound generates an osmotic pressure of 2.52 atm at 20.0°C. What is the molar mass of the unknown compound? Group of answer choices 46.6 g/mol 171 g/mol 30.2 g/mol 23.3 g/mol 34.0 g/mol23

The boiling point of a liquid is 28.3°C. A portion of the liquid is at equilibrium with its vapor at 22.3°C in a sealed flask. The temperature rises to to 32.6°C.What happens inside the container? Liquid is converted to vapor, the new equilbrium mixture contains less liquid and more vapor. The vapor is all converted to liquid. Vapor is converted to liquid, the new equilibrium mixture contains more liquid and less vapor. The liquid is all converted to vapor.

3. A spherical balloon is made from a material whose mass is 3.50 kg. The thickness of the material is negligible compared to the 1.30 m radius of the balloon. The balloon is filled with helium (He) at a temperature of 300 K and just floats in air, neither rising nor falling. The density of the surrounding air is 1.19 kg/m3 and the molar mass of helium is 4.0026x10 kg/mol. Find the absolute pressure of the helium gas. Pa 60 ssf6

One mole of hydrogen gas (molar mass = 2.0 g/mol) has an rms velocity of 2.0 x 10° m/s. To what temperature on the Celsius scale does this correspond? 3.2 x 105 °C O 4.8 x 104 C 3.2 x 102 °C 48°C 6.9°C

You read in a popular diet blog that the author claims you can lose up to half a pound of body fat per week if, instead of drinking 1.9 liters (i.e., 1.9 kilograms) of water every day, you can eat the same amount of water in the form of ice. The reasoning is that your body must first melt the ice and then bring the ice water up to the body temperature of 37°C, which is a process that requires a significant amount of energy at the expense of “burned” body fat. Thankfully, you just finished discussing heat and phase changes in your physics class, so you can calculate exactly how much energy is expended. The specific heat and latent heat of fusion for water are 4.186 × 103 J/(kg⋅°C) and 3.34×105 J/kg, respectively a)  How many kilocalories do you expend when you eat 1.9 kg of ice at 0°C? Note that 1 kcal = 4186 J.  b) Assuming the metabolism of one pound of body fat produces 3500 kcal of energy, how many pounds of body fat could you lose in a week just by eating 1.9 kilograms of ice every…

What is the ΔS° for the reaction? Given are the S°, in J K-1 mol-1, of each substance in parentheses. SiCl4 (g, 330.73) + 2 Mg (s, 32.68) → 2 MgCl2 (s, 89.62) + Si (s, 18.83)     -198.02 J/K     198.02 J/K     -254.96 J/K     254.96 J/K

What is the relative humidity on a 30.0 °C day when the air contains 12 g/m³ of water vapor? The vapor pressure of water at 30.0 °C is Py = 4.24 × 10 Pa and the molecular mass of water is M = 18.0 g/mol. % relative humidity:

2. A spherical balloon is made from a material whose mass is 2.90 kg. The thickness of the material is negligible compared to the 1.25 m radius of the balloon. The balloon is filled with helium (He) at a temperature of 300 K and just floats in air, neither rising nor falling. The density of the surrounding air is 1.19 kg/m and the molar mass of helium is 4.0026x10-3 kg/mol. Find the absolute pressure of the helium gas. Pa

A certain gas initially occupies 4.0 m3 while at a temperature of 40 oC and a pressure of 1.2 atm. If the temperature and pressure of the gas are raised to 60 oC and 1.5 atm, respectively, what will be the new volume?