The atomic mass of 14N is 14.003 amu. The atomic mass of 15N is 15.000 amu. What is the average atomic mass of nitrogen?

Which is the most common nutrient deficiency in the world? a. iron b. zinc c. copper d. calcium

Which hemisphere of the earth releases the most carbon dioxide into the atmosphere? why

Calculate the molar mass of Al (OH) 3.

What happens in a reduction half-reaction? elements gain electrons elements lose electrons oxygen is added oxygen is lost

A liquid compound containing only hydrogen and oxygen is placed in a flask. Two electrodes are dipped into the liquid and an electric current is passed between them. Gaseous hydrogen forms at one electrode and gaseous oxygen at the other.

What is the molar mass of Al2 (SO4) 3?150.03 g/mol 278.03 g/mol 342.17 g/mol 450.09 g/mol

1. Which of the following species determines the chemical properties of an atom? A. Electron B. Neutron C. Nucleus D. Proton 2. The following glasswares are used to measure the volume of liquids except A. graduated beaker B. pipette C. test tube D.

A sample of a certain material has a mass of 2.03 x 10-3 g. calculate the volume of the sample, given the density is 9.133 x 10-1 g/cm3.

What happens to a reactant molecules when forming product molecules

Which is the atomic number of an atom with six valence electrons