In an ecosystem, material can be recycled. Which of the following material can cycle through this ecosystem?

A. water

B. Oxygen

C. Carbon

D. All of the above

Which of the following is NOT a result of surface tension in water? A.) Surface area is maximized B.) Water has an unusually low vapor pressure C.) Surface appears to have a "skin" D.) Drops tend to become spherical

Debbie was doing a science lab, and she was instructed to decide whether a piece of plastic would float or sink without actually putting the plastic in the water. How could she do this?

Chemically balance ___ Cu + ___ Br2 → ___ CuBr2

How many moles are in 23.4g

What is the conversion of 160g to cg?

Attempt 2 A sample of gas contains 49.16 % N 2 gas, 19.85 % Br 2 gas, 9.95 % CO 2 gas, and 21.04 % of an unknown gas. The average atomic mass of the gas mixture is 50.71 u. Calculate the atomic mass of the unknown gas.

A chemist determined by measurements that. 040 moles of gold participated in a chemical reaction. calculate the mass of gold that participated in the chemical reaction. round your answer to significant digits.

10) A screwdriver has the density of 5.5 grams per cubic centimeter. It also has the mass of 2.3 grams. What is the screwdriver's volume?

A chemist weighed out 20.7 g of sodium. Calculate the number of moles of sodium she weighed out

If 1.00 mol of argon is placed in a 0.500-L container at 20.0 ∘C, what is the difference between the ideal pressure (as predicted by the ideal gas law) and the real pressure (as predicted by the van der Waals equation) ? For argon, a=1.