How many moles of carbon are in 7.87 x 10^7

The cooling of a refrigerator happens because of the heat flow towards the cooler object. Therefore, the heat flows into the refrigerant. This is as expected according to what law?

The energy exchange with the environment during a chemical reaction is called the heat of reaction. a. True b. False

Why is the periodic table a useful tool

which of the following has to remain constant to allow you to use the combine gas law for calculations?

What is the molarity of 100 g 60

A mixture of He He, N 2 N2, and Ar Ar has a pressure of 22.1 22.1 atm at 28.0 28.0 °C. If the partial pressure of He He is 2475 2475 torr and that of Ar Ar is 1049 1049 mm Hg, what is the partial pressure of N 2 N2?

Oceans make the temperaturs of nearby land more extreme ... True or false

The Greek letter D stands for A. Mass of B. Rate of C. Change in D. Heat stored in

14. Two or more substances that are together but do not combine to form a new, pure substance.

A solution of a compound with a known extinction coefficient of 23,100 M-1cm-1 has an absorbance of 0.735 in a 1.30cm path length, what is the concentration of the solution