There are two stable isotopes of bromine. Their masses are 78.9183 and 80.9163 amu. If the average atomic mass of bromine is 79.9091 amu, what is the natural abundance of the heavier isotope? percent abundance of 81Br __%

Which of the following represents the number of moles of a solute in one liter of a solution? 1. Density 2. Molarity 3. Percent by mass 4. Volume Question 2 The pH of a solution is 2.60. What is the [H3O+] for the solution? 1. 2.51 * 102 M 2. 3.

What is the net filtration pressure (NFP) if the glomerular hydrostatic pressure (GHP) is 55 mm Hg, the capsular hydrostatic pressure (CHP) is 15 mm Hg, and the glomerular colloid osmotic pressure (GCOP) is 35 mm Hg?

Which of the following statements is true based on the propositions of the kinetic molecular theory? 1) Solids have definite shape and volume, and their particles are in a fixed non-vibrating position.

Which of the following best represents and explains the formula for a compound made from fluorine and hydrogen? HF, because both fluorine and hydrogen are capable of forming only one ionic bond.

Which are the three main types if lipids

It would take one light year to travel to the sun? True or false?

A specific, electrically neutral atom of boron has 5 protons, 5 electrons, and 6 neutrons. what is the mass number of this atom of boron? 6 5 11 16

When does hail happen?

For the reaction, calculate how many moles of the product form when 0.012 mol of O2 completely reacts. Assume that there is more than enough of the other reactant. 4Al (s) + 3O2 (g) →2Al2O3 (s) Express your answer using two significant figures.

Nuclei with too many or too few neutrons are?