5x 10^25 atoms of nickel equal how many moles

Complete the following reactions using word and balanced equations including states. dilute phosphoric acid is added with a calcium hydroxide solution.

Which statement describes covalent bases? they have hydroxide ions. they produce hydrogen ions. they are often amines. they are named the same as ionic compounds.

If the atomic mass of an atom is 34 and the atom contains 13 protons, how many neutrons does the atom contain?