How many hydrogen atoms are in the following molecule of ammonium sulfide?

(NH4) 2S

How many valence electrons are there in silicon, which has an atomic number of 14? a. 2 b. 4 c. 6 d. 8

When radiometric dating is done on a rock sample, the rock's is determined.

What element has three half filled orbitals in the 3p sublevel

At room temperature and pressure, 1 mole of any gas takes up a volume of 24dm3 Calculate the volume that 0.6 miles of fluorine occupies.

Is coal a renewable resource

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?