Which one of the following is not a compound?

a. water

b. sugar

c. salt

d. chocolate chip cookies

which of the following is an element

a. chocolate chip cookies

b. sugar

c. salt water

d. oxygen

Consider 10.0 g of helium gas (He) in a rigid steel container. If you add 10.0 g of neon gas (Ne) to this container, which of the following best describes what happens? (Assume the temperature is constant.) a) The pressure in the container doubles.

sample of copper (II) sulfate pentahydrate, CuSO4⋅5H20, is heated to remove the water of hydration from the crystals. The mass of the original sample before heating was 50.00 grams. If the mass of the cool, dry sample after heating is 34.

The combustion reaction of c3h8o with o2 is represented by this balanced chemical equation. 2c3h8o + 9o2 6co2 + 8h2o when 3.00 g of c3h8o and 7.38 g of o2 are combined, how many moles of which reactant remain? (a) 0.006 mol o2 (b) 0.

Write a mathematical equation showing that volume (V) divided by temperature (T) remains equal to a constant (k).

What mass of silver ag which has an atomic mass of 107.87 amu contains the same number of atoms contained in 10.0g of boron b which has an atomic mass of 10.81 amu?

True or False: It is recommended to use sugar cubes to sweeten lemonade because they have a low surface area.

54,000,000 nanometers equals 0.000000054 megameters.

When cream mixes with coffee, is this a chemical or physical change?

A gas occupies 72.1 at stp. At what temperature would the gas occupy 85.9 L at a pressure of 93.6 kPa?

An 80 kg volleyball player lands from a jump and tries to stop her forward motion. The normal contact force exerted by the floor on her shoes is 2000 N. The friction force exerted by the floor on her shoes is 600 N acting backward on the player.