When hydrogen burns, water vapor is produced according to the following unbalanced equation:
H2(g) + O2(g) → H20(g)
If 12.67 L of oxygen are consumed, what volume of water vapor is produced?

What is the empirical formula of vanadium 1 oxide given that 20.38 grams of vandium combines with oxygen to form 23.58 grams of the oxide

Which of the following statements is true? a. elements in the last period are radioactive. b. atomic weight is the same as atomic mass. c. elements in the same group have the same number of electron shells. d. atomic number equals the number of neutrons in the nucleus of an atom.

1) this is the structure in the cell nucleus that houses a cell's genetic information