11. The least chemically reactive of the hydrocarbon

families are the

a) alkanes

c) alkynes

b) alkenes

Which of the four hypothetical substances you investigated would be most harmful to living organisms

How much salt is found in freshwater? Less than 1% Around 10% 0% Around 20%

Ni-cad (nickel-cadmium) batteries have a slightly lower cell potential than the common alkaline value of 1.5 v normally used in flashlights.

Describe in words a typical temperature vs time graph for the evaporation of a liquid.

How much space does 1 mole of any gas occupy?

A penny has a mass of 2.50g and the moon has a mass of 7.35 X 10^22 Use this information to answer the questions below. Be sure your answers have the correct number of significant digits.

If a car tire has a diameter of 3232 inches, what is the approximate circumference of the tire?

9) Bettina spoke into a microphone during the school play to increase the sound of her voice so the audience could hear her speak.

Explain what happens to the average kinetic energy thermal energy and temperature of a substance when the particles in the substance slows down

Which of the following could be used to describe the rate of a reaction? change in time/change in concentration change in mass/change in concentration change in concentration/change in time change in concentration/change in mass