An insulated cup contains 75g of water at 24 degrees. a 26g sample of metal at 82.25 degrees is added. the final temperature of the water and metal is 28.34 degrees. what is the specific heat of the metal?

Can anybody me with this? ? (picture included.)

Because air contracts as it cools, the air pressure inside a freezer is typically lower than on the outside. why do ice cubes inside a freezer tend to shrink over time? a. the ice dissolves oxygen from the air, forming a denser crystalline matrix.b. the ice reacts chemically with carbon dioxide in the air, forming gaseous carbon compounds.c. the ice melts, and then the liquid freezes as ice crystals on the bottom of the freezer.d. the ice sublimes, and then the water vapor deposits as ice crystals on the sides of the freezer.

What structural formula represents 4 electrons shared between two atoms?