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.

Temperature is _related to the average kinetic energy of a gas. inversely directly not disproportionally

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.

If we compare and contrast electromagnetic waves with sound waves, all but one statement is true. that is a) sound waves require a medium to travel while electromagnetic waves do not. b) electromagnetic waves can travel through the vacuum of space while sound waves cannot. c) electromagnetic waves must have a medium in which to travel, but sound waves can travel anywhere. eliminate d) sound waves must bounce off of matter in order to travel while electromagnetic waves do not require matter to be present.