Powdered zinc and sulfur react in an extremely rapid, exothermic reaction. The zinc sulfide that is formed can be used in the phosphor coating on the inside of a television tube. Zn(s) + S(s) → ZnS(s)

A 6.00 g sample of Zn is allowed to react with 3.35 g of S. Determine the excess reagent and how many grams of it will remain after the reaction.

Select one:
a. Zinc, 8.94 g
b. Zinc, 0.407 g
c. Sulfur, 8.94 g
d. Sulfur, 0.407 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.

Explain in detail of the four major scientific developments that spurred the formulation of the plate tectonics theory

How many moles of oxygen gas are produced from the decomposition of six moles of potassium chlorate