What is concentration in science

The gas phosphine (PH3) is used as a fumigant to protect stored grain and other durable produce from pests. Phosphine is generated where it is to be used by adding water to aluminum phosphide or magnesium phosphide.

Calculate density of aluminum if 27.6cm^3 has a mass of 74.6g

Does anybody know which element from the periodic table that has 19 electrons and 24 neutrons, for atomic charge.

Which of these is an example of something a civil engineer deals with? A. A gauge that reads the force of an explosion B. The wings on an airplane C. A steel crane that can lift heavy objects D. The sewage system in a neighborhood

How many Oxygen (O) atoms are in the following? H2O + CO2 3 2 4

If you have 39 g of sodium azide in an air bag [2nan3 (s) - > 2na (s) + 2n2 (g) ], then how many molecules of nitrogen gas will it make at stp?

If 1 mol of a gas in a container occupies a volume of 12 l at a pressure of 1 atm, what is the temperature of the gas in kelvins?

200 lb/in" = ? tons/ft?

What variable is not used in the combined gas law

What is bromic acid