12. Write the appropriate nuclear symbol for each of the
following isotopes: (a) Z = 11, A = 23 (b) Z = 28, A = 64 (c) Z =
50, A = 115 (d) Z = 20, A = 42
20. Ethane and acetylene are two gaseous hydrocarbons. Chemical
analysis show that one sample of ethane contains 2.65 g of carbon
and 0.668 g of hydrogen, and one sample of acetylene contains 4.56
g of carbon and 0.382 g of...
a)When is it appropriate to calculate a
z-test?
b)What is the formula for a z-test?
c)If we set α = 0.10 what does that tell
us?
d)If p < α then what should you
do?
e)What is the z-table used for when conducting a
z-test?
f)What are the 7 steps for hypothesis
testing?
QUESTION 1
Which of the following is the Greek symbol chi?
a.
X
b.
?
c.
?
d.
?
1 points
QUESTION 2
Researchers wanted to know whether it is better to give the
diphtheria, tetanus and pertussis (DTaP) vaccine in the thigh or
the arm, so they collected data on severe reactions to this vaccine
in children aged 3 to 6 years old. What would be the best
statistical test for them to utilize?
a.
One-sample chi-square
b....
Define the following order on the set Z × Z: (a, b) < (c, d)
if either a < c or a = c and b < d. This is referred to as
the dictionary order on Z × Z.
(a) Show that there are infinitely many elements (x, y) in Z × Z
satisfying the inequalities (0, 0) < (x, y) < (1, 1).
(b) Show that Axioms O1–O3 ( Trichotomy, Transitivity, Addition
for inequalities) are satisfied for this...
Write the electron configuration of
the following elements using appropriate noble gas symbol to
represent inner-shell electrons. Draw the orbital “box” diagram for
the valence-shell electrons for these elements. Identify a
diamagnetic element, the least paramagnetic element, and the most
paramagnetic element. (Note: for transition metals, valence
electrons include those in (n-1)d subshell.)
(a) Sc (Z =
21)
(b) Ti (Z =
22)
(c) Cr (Z = 24):
(d) Mn (Z =
25):
(e) Cu (Z =
29):
ANSWER...
23. Given a = 5, b = 4, c = 2, evaluate the following:
a) a//c
b) a % b
c) b **c
d) b *= c
27. Given the following
var_1 = 2.0
var_2 = "apple"
var_3 = 'orange'
var_4 = 4
Predict the output of the following statements or indicate that
there would be an error.
a) print (var_1)
b) print (var_2)
c) print ("var_3")
d) print (var_1 / var_4)
e) print (var_4 + var_3)
f) print (var_2...
11. Which of the following C# statements displays the following
message “your Score is 28”:
(note that Score is an integer variable holding the value of
28)
int Score =28;
Group of answer choices
a. MessageBox.Show = “Your Score is “ + “Score”;
d. MessageBox.Show (“Your Score is” + Score);
b. MessageBox.Show = “Your Score is” + Score;
c. MessageBox.Show (“Your Score is” + “Score”);
12. The ____________ contains statements that can potentially
throw an exception.
Group of answer choices...