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

The half-life of carbon-14 is about 6000 years. assume that a sample of charcoal is formed by burning of living wood 15,000 years ago. how much of the original carbon-14 would remain today?

1 kg is equal to ... Options: 1) 103 hg. 2) 103 g. 3) 10-2 cg. 4) 10-2 g.

Which is an example of the strong force in action? A battery-powered radio produces sound. A magnet keeps a cabinet door closed. The Sun pulls on Earth as Earth moves around the Sun. The protons in the nucleus of a carbon atom are held together.

Which element is classified as an alkali metal?

What are the most common student injuries in the chemistry lab and how can they be prevented

Acid indigestion is sometimes neutralized with an antacid such as magnesium hydroxide (Mg (OH) 2). What products will be released when the antacid is mixed with the hydrochloric acid in the stomach

What particles make up the nucleus

Calculate the wavelength of EMR that has a frequency of 9.50 x 10^8 Hz

How many moles of FeO are produced if 8 moles of CuFeS, are consumed?

Which chemical found in tobacco is a stimulant drug