Which pair of terms best describes the type of change that occurred in the reaction?

3. The temperature of a fixed mass of gas in a rigid container is decreased from 127.00 degrees Celsius to 27.0 degrees Celsius. The initial pressure was 1000. mmHg. What is the new pressure, in mmHg, after cooling?

In the bohr model of the atom, an electron that absorbs energy would

How much more basic is a solution with pH 10 than a solution with pH 8? A. 2 times B. 6 times C. 10 times D. 100 times

The forensic technician at a crime scene has just prepared a luminol stock solution by adding 18.0 g of luminol to H2O creating a solution with a total volume of 75.0 mL.

Define mechanical energy

Why is portion control important

Which ionic compound is the most likely to dissolve in water? CaSO4 Na2SO4 BaSO4 SrSO4

Calcium (atomic number 20) has electron configuration 1s2,2s2,2p6,3s2,3p6,4s2. The atomic number of scandium is 21. Which orbital does the 21st electron enter? a. 3d b. 4p c. 4d d. 4f

In these solutions, identify the solute and the solvent Sea water, a solution composed of a variety of salts dissolved in water. The salt is the Soda water, a solution composed of carbon dioxide gas dissolved in water.

What is an Element and how it different from a Atom?