5. Which of the following is NOT a physical change?

nailing together boards of wood

breaking an egg

dying your hair

adding food coloring to water

What do the colors produced by fireworks indicate? a. a physical change c. a state change b. a chemical change d. an element change

Which is a chacteristic of a solution?

Polyethylene is a synthetic polymer or plastic with many uses. 1.36 g of a polyethylene sample was dissolved in enough benzene to make 100. mL of solution, and the osmotic pressure was found to be 1.86 torr at 25oC.

An increase in mass will

As the ability to flow decreases, viscosity. Increase Decrease

The least electronegative element from among the following is A. Na. B. Cl. C. Cs. D. S.

Which description explains how inertia changes the effects of gravity on objects in the solar system?

Real-life example of an exponential decay.

What is the molarity of an acid that is made up of 9.5 moles of HCl dissolved in 1:24 L of water?

Write a balanced chemical equation describing the reaction of zinc and hydrochloric acid.