Your science teacher removed the gas from a birthday balloon. They discovered that the gas is made of the element helium. Inside that atom is: A. A new substance
B. Protons, neutrons and electrons
C. A different element
D. All of the above

Select all of the methods through which a drug can enter your body. injection swallowing inhalation absorption

The diagram below shows the different phase transitions that occur in matter. which arrow represents the transition in which dew is formed?

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.