Which biomolecule contains hydrogen, oxygen, nitrogen, carbon and phosphorus?

How many protons neutrons and electrons are there in a neutral atom of 43k (potassium-43) ?

What is the oh - given the value of h30 + = (9.61x10^-2) M?

Which of the following is represented in the highest percentage by volume in dry air? a. Oxygen b. Carbon dioxide c. Nitrogen d. Hydrogen

The oxidation numbers of nitrogen in nh3, hno3, and no2 are, respectively:

The cracking of rock due to heat is an example of

According to the octet rule most elements need_valence electrons.

What is the average speed of particle in a gas at room temperature? Why is temperature an important variable?

An electron is in a region outside the nucleus. An electron a) Is larger than a proton and has no charge b) Has less mass than a proton and has a negative charge c) Is smaller than a proton and has no charge d) Has a positive charge

Under conditions of "feasting", the body favors oxidation/utilization of which source for energy production

2.17 in to 10^23 molecules of Br 2 to moles