GENERAL CHEMISTRY 2

Calculate the heat needed to melt 100 g of ice

Hot water at 100 degree Celsius can burn and damage the skin, but the effect of steam on the skin can even more severe. Calculate the amount of heat absorbed by the skin from a 112 –g steam burned at 100 degree Celsius.

If 100 L of a gas mixture over a metropolitan area contains 0.050 L of CO, what is the concentration in ppm of CO present?

Hot water at 100 degree Celsius can burn and damage the skin, but the effect of steam on the skin can even more severe. Calculate the amount of heat absorbed by the skin from a 112 –g steam burned at 100 degree Celsius.

. A sulfuric acid solution containing 572.0 g of H2SO4 per liter of solution has a density of 1.33 g/mL. (Note: MM of H2SO4 = 98 g/mol;MM of H2O = 18 g/mol).Calculate the molality.

How would you prepare a 0.2 M HCI solution from 15 mL of a 0.6 M HCI stock solution?

A 1.00 g sample of octane was burned in a bomb calorimeter with 1300 g of water. The temperature increases from 25 C to 34.10 C. calculate the heat of combustion of octane in kJ/mol if the heat capacity of the calorimeter is 890 J/C, and the specific heat of water is 4.184 J/g C. Calculate the heat absorbed by the water(kJ).

What is the mass percentage of Fe in a piece of metal with 98.9 g of Fe in a 113 g sample?

How much energy (J) is removed to cool 50.0 g of steam at 115.0 ^oC to ice at -5.0 ^oC? Solve for q₂: Freeze the water into ice at 0 °C.

A 97.0 g sample of gold at 785^oC is dropped into 323 g of water, which has an initial temperature of 15.0^oC. If gold has a specific heat of 0.129 J/g^oC, what is the final temperature of the mixture? Assume that the gold experiences no change in state of matter.