Chemistry Questions

CuO + H2 ---> Cu + H2O. This equation is an example of

Which of the following is NOT a radioactive element?

Two or more elements combine to form a

There are 15 protons and 22 neutrons in the nucleus of an element. What is its mass number?

The pH of a solution, whose hydrogen ion concentration is 1 x 10 mole per litre, will be ____.

What is the name of the process where gas is directly converted to solids called?

If the first and third members of a Dobereiner triad are Phosphorous and Antimony, the second member of this triad is

Which of the following is used in the preparation of tincture iodine, cough syrup and many tonics?