Calculating the ph of a solution

Calculate the mole fraction of each gas in a mixture of 43.6 g Xe and 36.8 g Kr. show work

Why is there a need for increased recycling to preserve phosphorus

In one of your trials you placed 5.5 grams of salt in 10 ml of water. Use this information to answer the following questions. a. What is the w/w%? b. What is the w/v% c. How many moles of NH4Cl are used? Remember, moles = mass/molar mass d.

All of the atoms of argon have the same? 1. atomic number 2. number of nucleons 3. mass number 4. number of neutrons

If heat flows out of a system, the heat change (AH) will be , and the reaction will be

A system consists of two components, each of which must activate if the system is to activate. One component has a reliability of. 99. The other has a reliability of. 95. The components are independent of one another with respect to reliability.

Which of the following energy level changes for an electron is most energetic? 3 → 2 5 → 2 4 → 2

Is baking soda a element compound homogeneous mixture or heterogeneous mixture?

For the reaction: C (CH3) 3I + Cl - → C (CH3) 3Cl + I- What is the activation barrier for the SN2 reaction mechanism, in units of kcal/mol? Provide your answer to the nearest 0.1 kcal/mol.

Which of the following utilizes the measurement of a short - or long-lived radioactive element, with its decay product, to determine the absolute age of an object? A. varves B. radiometric dating C. dendrochronology