How many moles are in 12.2 g of copper sulfate

Ag(s) + Pb 504(s) → Pb(s) + Agt (ac) + say (ac) Datos A H°298: 53, 22 kcal A Gers: 53,41 cal Acp298: -8,7 Cal K(T) = ? In KT = In K298 + + 1 T 55,8 8,7×103³ dł. √248 TF2 TF - 4,4 In T = +28,8-2,81 × 10-4 T

7. The figure shows a 50 kg lead cylindrical piston which floats on 0.68 mol of compressed air at 30°C. How far does the piston move if the temperature is increased to 300°C? 130 cm 250 cm 50 kg 1300 cm 120 cm 30°C 10 cm

Gas is confined in a tank at a pressure of 12.7 atm and a temperature of 24.0°C. If two-thirds of the gas is withdrawn and the temperature is raised to 67.0°C, what is the pressure of the gas remaining in the tank?

What is the density of water vapor in the air on a hot, dry day in the desert when the temperature is 40.0 °C and the relative humidity is 5.00 %? The vapor pressure of water at 40.0 °C is Py = 7.34 x 10° Pa and the molecular mass of water is M = 18.0 g/mol. Enter your answer in units of grams per cubic meter. density: g/m3

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

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

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…

(5%) Problem 10: 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 2.4 liters (i.e., 2.4 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. 50% Part (a) How many kilocalories do you expend when you eat 2.4 kg of ice at 0°C? Note that 1 kcal = 4186 J. Q=7174 * Attempts Remain 50% Part (b) Assuming the metabolism of one pound of body fat produces 3500 kcal of energy, how many pounds of body fat could…

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