Why is it important to know the difference between physical properties and chemical properties

How many moles of N are in 0.209 grams of N20

What is the concentration of a solution, in parts per million, if 0.02 gram of Na3PO4 is dissolved in 1000 grams of water

In the laboratory, a general chemistry student measured the pH of a 0.583M solution of HClO_3 to be 3.862. What is the experimentally determined value of K_a for HClO_3? A. 1.37 times 10^-4 B. 2.35 times 10^-4 C. 3.11 times 10^-7 D. 1.

What is the reduction half-reaction for the reaction of zinc with hydrochloric acid?

When a data set has an even number of elements, the median is calculated by

One way to experimentally measure the heat capacity of a Styrofoam cup calorimeter would be to melt a known mass of ice in warm water and measure hte temperature change.

For which gases does the ratio of PV to RT equal a constant? A. gases of very low temperature B. real gases C. gases at very high pressure D. ideal gases

Calculate how many Calories would be found in a breakfast consisting of the following: two eggs two pieces of toast buttered with one tablespoon of butter one 9 oz glass of orange juice

What are the electron configurations of an electrically neutral atom of sodium, electrically neutral atom of neon, and electrically neutral atom of oxygen?

Which is a product in the following chemical reaction? CH4 + 2O2 → CO2 + 2H2O CH4 H4 H2O O2