Which of the following does not describe elements?
a. they are uniform throughout.
b. they can be separated by a chemical reaction.
c. they cannot be separated by physical means.
d. they are listed on the periodic table.

At 300 mm hg, a gas has a volume of 380 l, what is the volume at standard pressure

Which statement correctly identifies the scientific question and describes why the question is scientific? question 1 refers to the supernatural.question 2 reflects a moral or social value.question 3 refers to something that can be measured.question 4 reflects a question that can’t be observed.

Select all that apply. using a value of ksp = 1.8 x 10-2 for the reaction pbcl2 (s) pb+2(aq) + 2cl -(aq). the concentration of the products yield a ksp of 2.1 x 10-2: