At 1.0 atm, terell heats a sample of soild caffeine at 178c the soild converts directly into gas. what is the name of this phase change?

A container with a fixed volume, filled with hydrogen gas at - 104c and 71.8 kPa is heated until the pressure reaches 225.9 kPa. What is the temperature of the hydrogen gas in degrees Celsius

Iron has a density of 7.86 g/cm^3. Calculate the volume of a piece of iron having a mass of 3.99 kg.

A small container is filled with liquid water. What can happen if the container of water is an open system that couldn't happen if it were a closed or isolated system?

0.450 moles of K2SO4 are dissolved in 195.0 mL of water. Calculate the molarity of the solution.

A saline solution contains 0.770 gg of NaClNaCl (molar mass = 58.55 g/molg/mol) in 133 mLmL of solution. Calculate the concentration of NaClNaCl in this solution, in units of molarity.

What causes combustion in cars?

A potassium atom (atomic number 19) and a bromine atom (atomic number 35) can form a chemical bond through a transfer of one electron. The potassium ion that forms has 18 electrons. What best describes the bromide ion that forms?

A 0.450 g0.450 g sample of impure CaCO3 (s) CaCO3 (s) is dissolved in 50.0 mL50.0 mL of 0.150 M HCl (aq) 0.150 M HCl (aq).

Define and explain bond energy.

A colorless, toxic, radioactive gas is called what