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.

1. if you have a gas at 127 degrees c, what is it's absolute temperature (kelvin)? a. 200kb. 300kc. 400kd. 500k2. if you had a gas whose absolute temperature measured 45 k, what is that temperature in celsius? a. -228 cb. -300 cc. 125 cd. 112 c

Ageochemist examines a piece of metal that he found in the soil. he performs tests to identify the metal from its density, electrical conductivity, and melting point. which statement best describes his investigation? a. he is determining physical properties that are sufficient to identify the metal.b. he is determining chemical properties that are sufficient to identify the metal.c. he is determining physical properties that are insufficient to identify the metal.d. he is determining chemical properties that are insufficient to identify the metal.

Ican determine the molar mass of an element by looking on the under the atomic mass for the element. for example the molar mass of phosphorus is 30.974 grams/mole. avogadro’s number tells me the amount of representative particles in 1 mole of any substance. this means 12.011 gram sample of carbon and a 32.0 gram sample of sulfur have the same number of atoms.