2. A 0.136 g sample of an unknown metal (X) reacted with excess hydrochloric acid according to the following balanced ch
Posted: Wed May 04, 2022 3:14 pm
2. A 0.136 g sample of an unknown metal (X) reacted with excess hydrochloric acid according to the following balanced chemical reaction: 2X(s) + 6 HCl(aq) → 2XCl(aq) + 3H-(g) The volume of hydrogen gas collected over water was 90.5 ml at 200 and a barometric pressure of 756 mmHg. Determine the atomic mass of the unknown metal Use the Periodic Table of elements to identify the metal.