1) The acceleration of 1 inch/s^2 converts to 1.57 * 1010 miles/year^2. 2) The three isotopes of chlorine are 35Cl, 37Cl, and 39Cl. If there is 5 times as much 37Cl as 39Cl, the fractions are: 35Cl is 0.806, 37Cl is 0.162, and 39Cl is 0.032.

1. Quiz 1
15 points each
inch miles
1) Convert an acceleration of 1 to
s2 year 2
in 3600 2 s 2 24 2 hr 2 365 2 day 2 1 ft 1mi mi
1 2* * * * * = 1.57 *1010
s 1hr 2 1day 2 1year 2 12in 5280 ft year 2
2) The atomic weight of Chlorine is 35.453. There are three isotopes of Cl: 35Cl, 37Cl, and
39
Cl. If there is 5 times as much 37Cl as 39Cl, calculate the fractions of the three isotopes.
Use the correct number of significant figures.
X * 35. + Y * 37. + Z * 39. = 35.453 X +Y + Z =1 5Z = Y
(1 − 6 Z ) * 35. + 5Z * 37. + Z * 39. = 35.453
X + (5Z ) + Z = 1
35. − 210Z + 185Z + 39 Z = 35.453
35. + 14 Z = 35.453 X = 1 − (5Z ) − Z
14 Z = 0.453 X = 1 − 6Z
Z = 3.24 * 10 −2
Y = 5 * Z = 1.62 * 10 −1
X = 1 − Y − Z = 0.806