When mixing calcium chloride and phonel red why does it get hot

A solution of methanol and water has a mole fraction of water of 0.312 and a total vapor pressure of 211 torr at 39.9 ∘C. The vapor pressures of pure methan ol and pure water at this temperature are 256 torr and 55.3 torr, respectively.

What are forms of renewable energy? Check all that apply. coal petroleum sunlight wind natural gas heat from within the earth Answers are sunlight, heat from within the earth, wind

An atom of strontium has at least four different isotopes. What is different between an isotope of 88Sr and an isotope of 84Sr?

The density of aluminum is 2.70g/cm^3. a piece of aluminum foil has a volume of 54.0 cm^3. what is the mass of this piece of aluminum foil?

A lightbulb filled with argon gas has a volume of 75 mL at STP. How many moles of argon gas does the lightbulb contain?

If a sample of copper with a density of 8.90 g/cm3 displaces 13.0 mL of water when placed in a beaker, what is its mass? a 1.46 g b. 0.685 g c. 116 g

Which statement accurately describes the origin and expansion of the universe

Conversion. 5 km to inches

How many kilojouls are required at 0c to melt an ice cube with a mass of 25g

Which substance is the oxidizing agent in this reaction? 2CuO+C→2Cu+CO2 Express your answer as a chemical formula.