(02.06 MC) The table compares some characteristics of two atoms. Charged Particles Atom Number of Neutrons Mass Number X 10 19 Y 8 16 Use the table to determine the number of protons for each atom. Then, choose the statement below that is true about the two atoms. (5 points) a Atom X and Atom Y are isotopes. b Atom X and Atom Y are in the same family. c Atom X is in a row below Atom Y on the periodic table. d Atom X is in a column to the right of Atom Y on the periodic table.

What type of reaction is shown below? check all that apply. 2h2o2 → 2h2o + o2 synthesis decomposition combustion

21. consider the following chemical reaction: n2+ o2 2 no if 10.0 g of n2 reacts with excess oxygen then how many grams of no can be formed? a) 10.7 g b) 21.4 g c) 32.9 g d) 42.8 g page 4 of 8

Achemistry student needs to standardize a fresh solution of sodium hydroxide. he carefully weighs out of oxalic acid , a diprotic acid that can be purchased inexpensively in high purity, and dissolves it in of distilled water. the student then titrates the oxalic acid solution with his sodium hydroxide solution. when the titration reaches the equivalence point, the student finds he has used of sodium hydroxide solution.calculate the molarity of the student's sodium hydroxide solution. be sure your answer has the correct number of significant digits.