Which of the following is a polyatomic ion?

O A N₂

B. HCl

O C. S2

O D. PO43-

Which of these is pure substance as well as a compound A. An atom of hydrogen B. A sample of oxygen gas C. Sample of carbon dioxide D. A solution of carbon dioxide dissolved in water

Many elements bond to carbon by exchanging electrons. true or false.

How many grams are in 1.11 moles of MN3 (SO4) 7

Why do some molecules begin sticking together when you add in more molecules?

Suppose sodium chloride mixes with Silica (a hard glassy material that does not dissolve in water) Describe a way to remove the sodium chloride

If the heat released during condensation goes only to warming the iron block, what is the final temperature (in ∘C∘C) of the iron block? (Assume a constant enthalpy of vaporization for water of 44.0 kJ/molkJ/mol.)

Which of the following is not a disaccharide? A) sucrose B) maltose C) lactose D) amylose E) all of the above are disaccarides

The process by which a semipermeable membrane allows water molecules, small molecules, and ions to pass through while retaining large particles

Ice melting, water boiling, lighting a match, grape juice freezing. Which statement describes evidence of a chemical reaction

An ion from a given element has 22 protons and 18 electrons. what is the charge on the ion?