Nitrogen has two nauturally occurring isotopes n-14 and n-15

Its atomic mass is 14.007 which isotope is abundant

What pH does an acid have?

In 1909, Ernest Rutherford shot tiny particles at a sheet of gold foil. He expected all of the particles to move straight through the gold's atoms. Instead, some of the particles moved through, but other particles bounced back.

The pH of a 0.25 M aqueous solution of hydrofluoric acid, HF, at 25.0 °C is 2.03. What is the value of Ka for HF? 6.0 * 10-5 3.5 * 10-4 1.1 * 10-9 2.0 * 10-9 none of the above

How are inner and outer planets different?

How many liters of hydrogen gas is formed from the complete reaction of 15.9 g c? assume that the hydrogen gas is collected at a pressure of 1.0 atm and a temperature of 360 k?

True of false an unbalanced force cannot change the direction in which an object is moving

What are the primary atoms that make up the scents that we smell?

What happens if sodium sulfide is added to iron (II) sulfide?

What is the lowest energy level that contains d orbitals? O A. 4 O B. 1 O c. 3 O D. 2

What is the nature of the Ca-Cl bond in a molecule of calcium chloride (CaCl2) if the electronegativity value of calcium is 1.0 and that of chlorine is 3.167 O A nonpolar covalent B. moderately polar covalent C.