Question

Dobereiner arranged elements P, Q, and R, in the triads as follows.
P. -
Q. 81.25
R. 12
The atomic mass of p is roughly equal to​

Answer 1

Answer:

Carbon dioxide is given off during the reaction between copper(II) carbonate and hydrochloric acid. ... Metal oxides and metal hydroxides both react with acids to produce salts and water.

Explanation:

not that hard it's easy not