7. Magnesium chloride forms a hydrated salt. When a sample of magnesium chloride is analyzed, it is found to contain
53.20 % water. Calculate the formula of this hydrate.

8. A hydrated sodium salt containing 39.7 % water is
analyzed as follows: Na 16.9%; C 17.7 %; H 6.67 %; and O 58.8 %. What is the formula of this salt?

Use the table to identify the phase and phase changes of the elements under the given conditions. write the name of the substance, phase, or phase change. when the temperature in a room increases from 25°c to 33°c, changes from a solid to a liquid. in a lab, methane and nitrogen are cooled from -170°c to -200°c. the methane freezes and the nitrogen . when gold is heated to 2,856°c it changes from a liquid to a .

What diagram shows the ionic compound of magnesium oxide

If the density of water is 1.0 g/cm3, which of these materials would float in water, based on their densities? check all that apply. aluminum cork iron lead wax