A chemist must prepare
500.0mL
of hydrochloric acid solution with a pH of
0.50
at
25°C
.

He will do this in three steps:

Fill a
500.0mL
volumetric flask about halfway with distilled water. Measure out a small volume of concentrated (
8.0M
) stock hydrochloric acid solution and add it to the flask. Fill the flask to the mark with distilled water.

Calculate the volume of concentrated hydrochloric acid that the chemist must measure out in the second step. Round your answer to

2
significant digits.

How would the number of moles (n) of o2 change if the atmospheric pressure doubled but all other variables stayed the same

Problem page combustion of hydrocarbons such as pentane ( c5 h12 ) produces carbon dioxide, a "greenhouse gas." greenhouse gases in the earth's atmosphere can trap the sun's heat, raising the average temperature of the earth. for this reason there has been a great deal of international discussion about whether to regulate the production of carbon dioxide.(a) write a balanced chemical equation, including physical state symbols, for the combustion of liquid pentane into gaseous carbon dioxide and gaseous water. (b) suppose 0.350 kg of pentane are burned in air at a pressure of exactly 1 atm and a temperature of 20.0 degree c. calculate the volume of carbon dioxide gas that is produced.be sure your answer has the correct number of significant digits.

In a copper wire, a temperature increase is the result of which of the following