Theoretical yield and percentage yield of:

2.00g of Lead (II) Nitrate & 3.00g of Potassium Iodide

The balanced chemical equation is
Pb(NO3)2 + 2KI —> PbI2 + 2KO3

Please include the working out

How many moles are in 7.2 x 10^23 carbon molecules? (*round to the nearest hundredth and include the unit "mol c" after your number) question 6 options:

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.

Is a pencil falling to the floor anon contact force, a force, or a contact force