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Psy
Questions (29)
A rescue plane drops a package of emergency supplies to a stranded explorer. The plane is travelling at 40m/s and at a height of
1 answer
205 views
Sin²(x)=0.25
3 answers
141 views
A chemical in an inflatable
tank is being heated. The volume of the tank depends on time y in minutes. The rate at which the
1 answer
159 views
Find f'(x)
f (x) = 4ln(3x + 5)
1 answer
104 views
Differentiate sin²x
1 answer
118 views
Find d
dx f (x) given (a) f (x) = x 2 sin(2x 2 + 20)
3 answers
66 views
Find y'
y = x 2 cos(x)
3 answers
87 views
Given that x
2 y 2 = cos x 2 y 2 � , determine dy dx
1 answer
73 views
Suppose r =
4t 3−27 3 and s = t 2 + 3t, determine ds dr
1 answer
88 views
Doctors have to attend to a
patient on top of a building using a 50 m ladder before s/he is evacuated to a hospital. The ladder
1 answer
130 views
By applying differentiation,
sketch the graph of k(x) = 20x 3 − 3x 5 .
3 answers
102 views
What is the derivative of
h(y) = log y 2 + 4y ?
3 answers
81 views
Differentiate g(x) = cos5
(4x).
1 answer
97 views
Sin²(theta)=0.25
3 answers
118 views
Calculate the number of moles of NaOBr(s) that would have to be added to 125 mL of 0.160
M HOBr to produce a buffer solution with
1 answer
124 views
A solution of Ba(OH)2 is titrated into a solution of HOBr.
(i) Calculate the volume of 0.115 M Ba(OH)2(aq) needed to reach the
2 answers
135 views
the equilibrium constant expression for the ionization of HOBr in water, then calculate
the concentration of HOBr(aq) in an HOBr
1 answer
137 views
Hypobromous acid, HOBr, is a weak acid that dissociates in water, as represented by the equation
below: HOBr(aq) ↔ H+(aq) +
1 answer
129 views
Suppose that 0.10 liter of 0.50 molar hydrochloric acid is added to 0.040 liter of the buffer
prepared in (b). Compute the
1 answer
129 views
A buffer solution is prepared by adding 0.10 liter of 2.0 molar acetic acid solution to 0.1 liter
of a 1.0 molar sodium hydroxide
3 answers
259 views
What is the pH of a 2.0 molar solution of acetic acid. Ka acetic acid = 1.810–5
1 answer
97 views
Sigma x-x³/x³ dx
3 answers
73 views
State which of the following species are amphiprotic and write chemical equations illustrating the amphiprotic character of
1 answer
116 views
How will you know when your titration is finished?
1 answer
89 views
What is the concentration of 10.00 mL of HBr if it takes 16.73 mL of a 0.253 M LiOH solution to
neutralize it?
1 answer
123 views
Write the neutralization reaction that occurs between hydrobromic acid (HBr) and lithium hydroxide
(LiOH).
1 answer
145 views
A light string can
support a stationary hanging load of 25.0 kg before breaking. An object of mass m 5 3.00 kg attached to the
1 answer
158 views
The resistance of a given electric device is 46 ohms at
0 25 C . If the temperature coefficient of resistance of the material is
1 answer
597 views
Some friends are camping near the shore. One friend suggests that they go fishing. Six boats are available at the campsite. Each
1 answer
330 views
Answers (4)
Doctors have to attend to a patient on top of a building using a 50 m ladder before s/he is evacuated to a hospital. The ladder is placed against the building. The top of the ladder is sliding down the building at the rate of 2 m/min. Determine the rate at
By applying differentiation, sketch the graph of k(x) = 20x 3 − 3x 5 .
A solution of Ba(OH)2 is titrated into a solution of HOBr. (i) Calculate the volume of 0.115 M Ba(OH)2(aq) needed to reach the equivalence point when titrated into a 65.0 mL sample of 0.146 M HOBr(aq). (ii) Indicate whether the pH at the equivalence point
Suppose that 0.10 liter of 0.50 molar hydrochloric acid is added to 0.040 liter of the buffer prepared in (b). Compute the hydrogen ion concentration of the resulting solution.
