A) co2 is non polar while h2o is polar why?
b) why pcl5 is very reactive?
c) h2o is a liquid h2s is a gas. why?

it is a 3 mark question so (a) carries 1 mark, (b)carries 1 and (c)carries 1 mark
following this method and post the question

If 34.2 grams of lithium react with excess water, how many liters of hydrogen gas can be produced at 299 kelvin and 1.21 atmospheres? 2 li (s) + 2 h2o (l) yields 2 lioh (aq) + h2 (g)

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.

What is the correct lewis dot structure for arsenic?