Select all that apply.

Living organisms use atoms from sugar molecules combined with other elements to form ...

A. Lipids

B. Metals

C. Nonmetal atoms

D. Nucleic acids

Many mosquito populations today are resistant to pesticides that were historically effective. This pesticide resistance arose in these populations because:

The equilibrium expression for a chemical reaction is Keq = [NOBr]2/[NO]2[Br2] What is the reaction?

Which statement about intermolecular forces is true? Group of answer choices A. Only occur in ionic bonds. B. They have to be overcome to decompose a substance. C. These forces hold atoms together in a molecule. D.

When a substance evaporates, what happens to the mass? The mass increases as it changes from a liquid to a gas. The mass decreases as it changes from a liquid to a gas. The mass stays constant as it changes from a liquid to a gas.

A gas has a volume of 6.46L at 1.06 atm and 77.2°C. What is the volume of the gas (in L) at STP

Oxygen forms a number of compounds with sulfur, many of which are quite reactive. One such compound is 57.20 % by mass S. Calculate the number of grams of oxygen present in a sample of this compound that contains 50.00 grams of S.

What is meant by "pressure of the atmosphere?" What causes this pressure?

A substance is analyzed and found to contain 85.7% carbon and 14.3% hydrogen by weight. A gaseous sample of the substance is found to have a density of 1.87 g/L, and 1 mol of it occupies a volume of 22.4 L.

Which property of a mineral sample does not influence how quickly it settles in water? 1) density 2) hardness 3) shape 4) size

Dinitrogen difluoride gas is collected at in an evacuated flask with a measured volume of. When all the gas has been collected, the pressure in the flask is measured to be.