Both molarity and molality are measures of concentration, or how much solute is dissolved in solvent. Let's first get acquainted with a couple of terms. Solute - what gets dissolved Solvent - what the solute dissolves in Solution - solute and solute together Now, we can write out formulas for our two terms. Molarity(M) = moles of solute/ Liters of solution Molality(m) = moles of solute/ kg of solvent As evident from the formulas, molarity and molality equations both have the

The only two elements in alkenes and alkynes are (1) carbon and nitrogen (2) carbon and hydrogen (3) oxygen and nitrogen (4) oxygen and hydrogen Answer: (2) carbon and hydrogen Explanation: If we look at the Chemistry Regent Reference table, we will see on Table Q, that alkenes and alkynes belong to the Homologous Series of Hydrocarbons. Hydrocarbons are organic molecules that contain carbon and hydrogen. Therefore, they must have the elements of hydrogen and carbon, making c

It's almost december and that means it's finals time! This can be very overwhelming and stressful. At Transformation Tutoring, we came up with tips on how to best prepare for your chemistry finals. 1. Make a to-do list. List items in terms of priority. Since time is limited, it is important to focus on the most important tasks that need to be done. Make a big plan for the two upcoming weeks with major milestones (for example, review chapter 3 by Monday). Also make a todo lis

Which notations represent atoms that have the same number of protons but a different number of neutrons? (1) H-3 and He-3 (2) S-32 and S-32 (3) Cl-35 and Cl-37 (4) Ga-70 and Ge-73 Answer and Explanation: Choice 3 is the correct answer choice Atoms of the same element that have the same number of protons but a different number of neutrons are called isotopes. Whenever we see an element symbol followed by a dash and a number, that number represents the mass of the element. Choi