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Chem 1311 Final Exam Detailed Questions and Expert Answers
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Chem 1311 Final Exam Detailed Questions and Expert Answers
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Chem 1311 Final Exam Detailed Questions andExpert Answers
Which of the following would be considered a chemical change? - ANS a rusty nail
How many atoms of hydrogen are present in 5.96 grams of ammonia (NH3)? - ANS
6.33 x 10^23
How many atoms of hydrogen are present in 1.06 grams of ammonia (NH3)? - ANS
1.12 x 10^23
Which of the following processes represents the ionization energy of bromine? -
ANS Br(g) ----> Br^+(g)+e^-
The first scientist to show that atoms emit any negative particles was - ANS J. J.
Thomson
Give the possible values for ml for a d-orbital - ANS -2,-1,0,1,2
Give the possible values for ml for a p-orbital - ANS -1, 0, 1
Sc has ____________ in its d orbital - ANS one electron
, V has ________________ in its d orbital - ANS three electrons
Which of the following combinations of quantum numbers is not allowed? - ANS n
= 3, l = 1, ml = 2, ms = -1/2
n = 4, l = 0, ml = 1, ms = 1/2
the degree of agreement among several measurements of the same quantity is
called _____________. It reflects the reproducibility of a given type of
measurements. - ANS Precision
An isotope, X, of a particular element has an atomic number of 15 and a mass
number of 31. Therefore:
a. A, B, and C
b. X has an atomic mass of 30.973
c. X has 16 neutrons per atom
d. X is an isotope of phosphorous
e. C and D - ANS C and D
What is the mass of a 0.0856-mol sample of potassium chloride (KCl)? - ANS 6.382
g
What is the mass of a 3.36-mol sample of potassium chloride (KCl)? - ANS 250.7 g
convert 4315 mL to qts. (1 L = 1.06 qt) - ANS 4.574 qts
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