A mystery element is a solid at room temperature. When connect in a circuit to a lightbulb, the lightbulb did not light up. It broke into pieces when it was dropped. What type of element is it? Explain your reasoning.

If 4.8 moles of x and 3.4 moles of y react according to the reaction below, how many moles of the excess reactant will be left over at the end of the reaction? 3x + 2y “yields”/ x3y2. a. 1.7 mol y left over b. 1.6 mol x left over c. 0.2 mol y left over d. 0.1 mol x left over