An atomic physicist determines that an atom is composed of 8 positively charged particles and has a mass of 15 amu. which is the best conclusion that can be drawn?
the atom has 7 neutrons and 8 protons.
the atom has 7 electrons and 8 protons.
the atom has 8 neutrons and 7 electrons.
the atom has 8 electrons and 7 protons.

What is the number of atoms in 3.54 mol s

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.

How many grams of mgbr2 are needed to produce 75g or metal?