What is chromatography used for? Select all that apply. ]

dissolving substances

separating liquids in a mixture

crystallizing substances

separating gases in a mixture

4 Suzanna notices that when she rolls a marble on the carpet, the marble slows down and stops. What force causes the marble to change its motion? How does this force act?

Recall the postulates of kinetic-molecular theory. Read the list and check all the statements that apply to the behavior of an ideal gas: 1. gas particles behave like hard spheres 2. gas particles travel randomly 3.

Which is the correctly balanced chemical equation for the reaction of KOH and H2SO4?

What is described by binary fission A) The way prokaryotes produce energy B) the way prokaryotes digest nutrients C) the way prokaryotes reproduce D) the way prokaryotes move.

Comparing the pairs of elements listed below, choose the pair in which both atoms have nuclei with the same number of neutrons. 147N and 168O 73Li and 94 Be 2311Na and 2412Mg 3216S and 5425Mn

A 5.00 g mixture of methane (CH4) and ethane (C2H6) is combusted in oxygen gas to produce carbon dioxide and water. If 14.09 g of CO2 is produced, how many grams of methane was in the original 5.00 g mixture?

Which list of elements contains only metals? A. carbon, iodine, tin B. tin, copper, cesium C. helium, iron, copper D. iodine, carbon, argon

If you put Alka Seltzer in water and leave it for about one minute is the solution acidic, basic, or neutral?

Certain object has a mass of 60 g and a volume of 32.6 cm³ what type of objects is the density

How important is the resonance structure shown here to the overall structure of carbon dioxide? how important is the resonance structure shown here to the overall structure of carbon dioxide?