Use the following terms to complete the concept map below: South America Pangaea North America Laurasia Gondwana

The atomic mass of 12C is 12.000000. Multiply the atomic mass of 12C by its abundance. Report the number to 5 significant digits.

How many moles of H2O are needed to produce 5.6 mol of NaOH? Na2O + H2O - -> 2NaOH

What is the atomic mass of an atom equal to 1/3 that of carbon-12?

A chemist places 10.0 grams of dry ice (CO 2) in a 2.5 L vacuum at 25˚C. After it all sublimates, what would be the pressure inside the container?

What is the chemical equation for the vaporization of methanol?

Liquid water is heated until it boils and becomes water gas. Which statement is true about the water?

You are conducting an experiment on plant growth. You take a plant fresh from the soil that weighs 5 kilograms (kg). Then you dry the plant overnight and determine the dry weight to be 1 kg.

What is the ratio of Fe+3 ions to O2 - ions in a neutral compound? a. 1:2 b. 2:1 c. 2:3 d. 3:2

What is the specific heat capacity of a 17.5g sample of an unknown metal that releases 6700J of heat when it cools from 90 to 25 degrees C?

How can equilibrium of a closed system chemical reaction be disturbed? Select all that apply. Adding or removing products or reactants. Keeping the concentration of products and reactants the same. Keeping the temperature of the system constant.