Chọn phương trình đúng khi nói về khí nito và khí hidro A. N2 + 3H2 −to→ NH3 B. N2 + H2 −to→ NH3
C. N2 + 3H2 −to→ 2NH3 D. N2 + H2 −to→ 2NH3

You encounter a solution that is acidic and you decide to test it by adding a small amount of a strong acid. the ph lowers slightly but is approximately unchanged, and still remains acidic. what can you say about the solution? a. it is a buffer solution. b. it is not a buffer solution it is a strong acid solution. d. the solution has been neutralized. e. the solution has excess acid present

When balancing a chemical equation:

Acompound has a molecular weight of 12.124 atomic mass units and the empirical formula c3h40. what is the molecular formula of the compound?