4. A strip of magnesium is placed into a test tube with hydrochloric acid to form magnesium
chloride and hydrogen. The total mass of the
reactants is measured to be 12 g. After the
reaction is complete, the mass of the system is
11.8 g. What happened to the rest of the mass?

Which statement describes the appearance of a temperature-vs.-time graph? a horizontal line shows that the temperature increases at a constant rate over time. a vertical line shows that the temperature decreases at a constant rate over time. horizontal lines where the temperature is constant during phase changes connect upward-sloping lines where the temperature increases. horizontal lines where the temperature increases are connected by upward-sloping lines where the temperature is constant for each phase.

If equal masses of the listed metals were collected , which would have a greatest volume ? a. aluminum 2.70,b.zinc7.14,c.copper 8.92,d.lead 11.34

Using the periodic table, complete the table to describe each atom. type in your answers