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An electron in a hydrogen atom drops from energy level n = 5 to n = 3. Calculate the energy for this transition using Rydberg equation.

A 5.0 mL aliquot of concentrated aspirin Brand X solution was diluted to a final volume of 150 mL with FeCl3. This solution concentration was determined to be 5.5 x 10-5 M. What is the concentration of the aspirin in the original aspirin Brand X solution? 

  Zinc reacts with hydrochloric acid to produce hydrogen gas as shown in the reaction below: Zn(s) + 2HCl (aq) = ZnCl2(aq) + H2(g) The mass of zinc was 0.225 g, the barometric pressure was 750 mm Hg, the temperature was 20oC. Assuming all the zinc reacted, find the volume of gas (H2) collected.  R = 62.358 L torr/mol K MM(Zn) = 65.38 g/mol

The excerpt most directly reflects the United States efforts to

Which of the following United States actions most directly resulted from the goals expressed in the excerpt?

“The reason why we find ourselves in a position of impotency is not because our only powerful potential enemy has sent men to invade our shores . . . but rather because of the traitorous actions of those who have been treated so well by this Nation. It has not been the less fortunate, or members of minority groups who have been traitorous to this Nation, but rather those who have had the benefits that the wealthiest Nation on earth has had to offer . . . the finest homes, the finest college education, and the finest jobs in government we can give. This is glaringly true in the State Department. There the bright young men who are born with silver spoons in their mouths are the ones who have been most traitorous.” Senator Joseph McCarthy, speech in Wheeling, West Virginia, 1950

The policies expressed in the excerpt contributed most directly to debates in the United States about the

6. Write down some ways you can read notes on the music staff of the treble and bass clef. – Include the note names on each line and space on the treble and bass clefs – Include certain mnemonic devices for treble and bass clefs (phrases)    

1. Select all the correct answers. (a) The music staff has five lines and four spaces. (b) Always count spaces and lines of the music staff from the bottom to the top. (c) There are seven musical alphabets letters, A B C D E F G. (d) It is impossible to learn how to read notes on the music staff.         

4. The note on the second line of the treble clef is B.