What term best describes the type of reaction that happens when a single element reacts with a molecule or compound, producing a new single element and a new molecule or compound? a. an isolation reaction b. a single combustion reaction c. a single replacement reaction d. a double replacement reaction

Consider the two electron arrangements for neutral atoms a and b. are atoms a and b the same element? a - 1s2, 2s2, 2p6, 3s1 b - 1s2, 2s2, 2p6, 5s1

How many grams of co(g) are there in 74.5 ml of the gas at 0.933 atm and 30o c?

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.