The atomic number is

A. use the atomic number

B. mass number - atomic number

C. number of protons and neutrons in an atom

D. number of proton in an atom

Which sample has the lowest entropy? (1) 1 mole of KNO3 (l) (3) 1 mole of H2O (l) (2) 1 mole of KNO3 (s) (4) 1 mole of H2O (g)

Cortisone consists of molecules, each of which contains 21 atoms of carbon (plus other atoms). the mass percentage of carbon in cortisone is 69.98%. what is the molar mass of cortisone?

40.0 mL of 0.300 M NaOH are mixed with 40.0 mL of 0.300 M HBr in a calorimeter. The temperature increases from 25.00 °C to 27.00 °C. Assume that the specific heat of the solution is the same as that of pure water (4.

The strong nuclear force is always smaller than the electrostatic force true or false

To fulfill the octet rule, electron sharing leads to how many electrons around each atom?

The plunger on a bicycle pump with a 400 mL volume cylinder is depressed such that the pressure in the pump increases from 1.00 atm to 6.00 atm.

Identify the property of magma that causes it to be forced upward towards earth's surface.

Classify each of these compounds as a Brønsted-Lowry acid, a Brønsted-Lowry base, or neither. Drag each item to the appropriate bin. are these a Brønsted-Lowry acid or a Brønsted-Lowry base H2SO4, HNO2, (CH3) 3N, C3H7NH2, HF, NH3, NaBr, CCl4

If you dissolve sugar into water in a small jar, will the result be a mixture, a solution or both? Explain.

Convert the following energy units. 635 kJ to J