Name:  _____________________                              date:  __________________               period: _______

Ch. 5 & 11 measurement & light                                             70 points                                              chemistry

In problems involving any calculation, show your work in an organized manner, include (i) any relevant equation (or formula), (ii) conversion factor(s), (iii) put the proper units in your calculations and answer, and (iv) have the proper number of significant figures in your answer.  If you use the online website, https://www.symbolab.com/solver, or associated app, then clearly state that you used the website / app and you don’t have to show the algebraic manipulation to solve the problem.

Academic Honesty:   The answers on this test / quiz are my own and I am using only the allowed set of notes as described in the syllabus and am only using a calculator or preceding website / app – I did not use any other website / app during the test / quiz.  I have not discussed the test questions with anyone during the test.  If you violate any of the preceding items or do not sign, your semester grade is a F.

                                                                                                Signature:  ___________________

1. Solve; conversion problems  [20 points]

a. 375 mm  =  __ m

b.  75 μs  =  __ s

c. 888 cm2  =  __ m2

d. 25 m / min  =   __ cm / sec 

2.  Solve; significant figures  [10 points]

a. 4.0  *  8.00 =  _______

b. 11.0  /  3.0  =  ________

c.  0.00175  +  0.045  =   _________

d. 5.00 – 2.3  =  ________

e. half of 35 =  ________


3. A 35.0 grams cylinder has a length of 5.0 cm and its density is 9.0 g / mL.  What is its radius in mm ?   hint: the formula for the volume of a cylinder is  V  =  π r2 l.  [10 points]

4. Solve;  light  [15 points]

a.  If energy is 4.8 * 10-20 J, then frequency =  ____

b.  If wavelength is 375 nm, then frequency =  ____

c. If wavelength is 125 μm, then energy =  ___

5. What is the rationale / basis on the limited number of lines in the hydrogen atom emission spectrum ?  [5 points]

 

 

 

 

 

  1.  List the following type of light in ascending order of __;  green, x-rays, orange, and microwave.  [10 points]
  1.  Wavelength:  _____________________________________________

 

  1. Energy:  _________________________________________________