A 0.130-g sample of an unknown metal X reacted with hydrochloric acid according to the following equation
2X(s) + 6HCI(aq) -----> 2XCI3(aq) + 3 H2(g)
The volume of the hydrogen gas collected over water was 92.0mL at 20 C and 763 mmHg calculate the atomic mass of the unknow metal and identify the metal from the periodic table.