The atomic number of an atom is always equal to the number of its

(1) protons, only (2) neutrons, only (3) protons plus neutrons (4) protons plus electrons

Consider the reaction below. 2 upper I superscript minus (a q) plus upper C l subscript 2 (g) right arrow 2 upper C l minus (a q) plus upper I subscript 2 (a q). Which half reaction correctly describes the reduction that is taking place?

What would you multiply "grams of nitrogen" by to get the units "moles of nitrogen?

The label on a bottle of vinegar says that the vinegar is 4% acetic acid. What would be the molarity of the acetic acid in solution

Name the 12 elements in the periodic table

Which of the following has six electrons in its valence shell? oxygen nitrogen sodium neon

What type of chemical process is used to create perfume?

Which of the following is a polyatomic ion? O A. HCI O B. Na O C. PO, O D. 52

What are the cations and anions for V2 (CO3) 3

If you were asked to convert 4.2 x 1022 atoms of aluminum to moles, which of the following should you use for the conversion?

Carbonic acid (H2CO3) does not dissortate 100 percent in water. What type of substance is it? weak acid Strong base strong acid weak base