A 17.44 g sample of a hydrate of zinc sulfate is heated in a crucible to drive off all of the water. After heating, the sample has a mass of 9.79g. What is the empirical
formula for this hydrate?

When a spring is compressed, the energy changes from kinetic to potential. which best describes what is causing this change?

8.98 dm3 of hydrogen gas is collected at 38.8 °c. find the volume the gas will occupy at -39.9 °c if the pressure remains constant.

The gulf stream is a warm water current that flows away from the equator to northern europe. witch of these does it cause. a. crashes of warm and cool water in the ocean b. colder climates near the equator c. large waves on the cost of europe d. warm climates in northern europe