Which of these is an example of a chemical change?

A. feeling ice melt on your skin

B. leaving cheese out to get moldy

C. smelling sprayed perfume

D. crushing ice with a hammer

The momentum of an object depends on which two quantities? A) velocity and weight B) Mass and Kinetic Energy C) Velocity and Kinetic Energy D) Mass and Velocity

What is the classification for this reaction? SO 3 + H20 - H250 4

What are three examples of organic matter in soil

How do you find if something will float or sink without putting it in water?

The electron configuration for an atom is 1s 2s 2p2. How many electrons does the atom have? 2 4 5 6

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?

1. How is pressure affected as depth increases? 2. As the sun heats the surface of the oceans, two layers of water result. What separates the layers? 3. How is temperature affected when? (a) the depth increases (b) the latitude increases 4.

Are nails in a jar with water a chemical change

What is the molarity of a solution composed of 4.73 g of potassium iodide (KI) dissolved in enough water to make 0.169 L of solution? Answer in units of M.

Suppose you were given a substance and asked to determine whether or not it was a plasma. Write the characteristics you would look for to identify the substance.