Which of the following does not indicate a chemical change? precipitate formation crushing a solid into a powder color change gas evolution

Josh is doing an experiment with water. He starts with a plastic cup of water that has a mass of 12 grams. He places the cup in a sealed container and puts it in the freezer overnight.

A 10 g sample of ice, at - 11 is mixed with 90 ml of water at 80. calculate the final temperature of the mixture assuming that no heat is lost to the surroundings. The heat capacities of H2O (s) and H2O (I) are 2.08 and 4.

How does renewable energy differ from nonrenewable energy? 5-6 paragragh

At STP, fluorine is a gas and iodine is a solid. This observation can be explained by the fact that fluorine has (1) weaker intermolecular forces of attraction than iodine (2) stronger intermolecular forces of attraction than iodine (3) lower

The following volumes of solution are combined in a test tube: 2.00 mL of 0.20 M potassium iodide 1.00 mL of 1% starch 0.50 mL of 0.20 M ammonium persulfate 0.50 mL of 0.012 M sodium thiosulfate 2.00 mL of 0.20 M potassium nitrate 2.00 mL of 0.

An ice cube is placed on a kitchen counter. Which best describes heat flow in this situation

When water is placed in a thin glass tube, it tends to climb up the walls of the tube. This effect is known as capillary action. What causes this capillary action? A. metallic bonding B. covalent bonding C. ionic bonding D. hydrogen bonding

Earth rotates once every 24 hours. What does this mean? A. Earth makes one full trip around the Moon every 24 hours. B. Earth completes a full spin on its axis once every 24 hours. C. Earth makes one full trip around the Sun every 24 hours. D.

Compare and contrast the outer core and the inner core.

What colors make the color turquoise?