20 g of nh4cl is added to 13.9 g of water. calculate the molality of the solution.

What is the name for the Fe2 + cation? Iron ion Iron (II) ion Ironide Ferride ion

Is evaporation of water a physical change or a chemical change? explain your answer?

A solution contains a mixture of pentane and hexane at room temperature. The solution has a vapor pressure of 255 torrtorr. Pure pentane and hexane have vapor pressures of 425 torrtorr and 151 torrtorr, respectively, at room temperature.

Where does California's Fresh Water come from? List everything you can think of.

What type of mountain are the andes mountains

A specific steroid has a λmax of 282 nm and a molar absorptivity ε of 11, 500 L mol - 1 cm - 1. What is the concentration of the compound in a solution whose absorbance at 282 nm is A = 0.060 with a sample pathlength of 1.00 cm?

The chemical formula for a covalently bonded group of atoms is called a

What is the molar mass, in grams, of a mole of an element equal to?

Isopropyl alcohol (C3H8O) is a common solvent used for cleaning and disinfectant purposes. Its mass spectrum is shown below.

How is an unsaturated fat converted to into a saturated fat?