Which of the following is a physical change?

A. magnetzing an iron rod

B. roasting marshmallows on a campfire

c. milk souring

D. an antacid neutralizing stomach acid

What happens to blood cells if there is too much sugar in the blood stream?

Which of the following statements about air masses is true? A. Air masses are areas of condensed water vapor, which are also known as clouds. B. Air masses are responsible for creating holes in the ozone layer. C.

Water drops forming on the outside of a cold glass is an example of which phase change

Reacts with air ... physical or chemical property; )

Which of the following is likely to be true about the ΔH for this reaction? C6H6 (l) → C6H6 (s) a. H < 0 b. H = 0 c. H > 0

Which describes the fourth state of matter known as plasma? A It is a liquid containing nuclei and electrons. B It is a gas containing nuclei and electrons. C It is a liquid containing electrons created by fusion.

The process of using dna to produce complementary rna molecules is called

A substance contains 36.1 percent calcium and 63.9 percent chlorine by weight. What is the empirical formula of the given compound? A. CaCl B. Ca0.9Cl1.8 C. CaCl2 D. Ca2Cl4

A sample of bismuth weighing 0.687 g was converted to bismuth chloride by reacting it first with HNO3, and then with HCI, followed by careful evaporation to dryness. The mass of the bismuth chloride obtained was 1.032 g.

When 1 g of sodium chloride (NaCl) is placed in 100 g of water, a solution results. Once the solution is prepared, water is now considered what part of the solution?