A scientist who wants to date materials older than 40,000 years would most likely use.

A closed container is filled with oxygen. the pressure in the container is 275 kpa. what is the pressure in millimeters of mercury?

What happens when an electron absorbs energy?

If you allow dry ice to stand in a ball at room temperature for several hours, what would be left?

Which of the following is true in regard to ions? A. A cation will hold a positive charge if it gains one or more electrons. B. An ionized atom has a number of protons that is unequal to the number of electrons. C.

A volume of 18.0 l contains a mixture of 0.250 mole n2, 0.250 mole o2, and an unknown quantity of he. the temperature of the mixture is 0 ∘c, and the total pressure is 1.00 atm. how many grams of helium are present in the gas mixture?

Light from the sun is absorbed by the ground and converted to what?

What contains paired statements that can be used to identify orgainisms

The molecule below contains both an aldehyde and a ketone functional group. select only the carbonyl carbon atom of the aldehyde functional group. identify the carbon atom by selecting the atom and assigning it a map number of 1.

what is the volume of 0.98 mol oxygen (O2) gas at 275 K and a pressure of 2.0 atm? (the universal gas constant is 0.0821 L*atm/mol*K)

A student asks you for a simple rule to tell apart plants cells and animal cells when viewed under a microscope. Describe such a rule.