Homework Statement
If you started at the basic end-point and titrated acetate solution to the acid end point, how much acid would be required?
Our acetate solution was:
1 mL of 0.1 M acetic acid
1 mL of 0.1 M acetate
8 mL of water
total volume: 10 mL
Titration with 0.1 M HCl...
Comparing the Rf values of carotene and lycopene?
Why does carotene have a higher Rf value than lycopene in TLC chromatography with a silica plate and a solvent of (3:10) dicholormethane:hexane?
I know it's because carotene is less polar making it more soluble in the TLC solvent and...
Homework Statement
For the reaction 2H2O(l) -> 2H2(g)+O2(g) delta H = +571.5 kJ
If the reaction is carried out in an insulated chamber what effect would the reaction have on the temperature in the chamber? Why?
The attempt at a solution
I can't seem to get my head around this one. I...
Yeah, I did that:
I got pi as the volume of the solid and undefined (infinity) for the surface area. However its the theoretical part that i'm unsure about, where its asking if there's something wrong with the method...
Homework Statement
Consider now a shape that is obtained by revolving
the “inﬁnitely long” function
f (x) = 1/x , 1 ≤ x < ∞
around the x-axis. Find both the surface area of the resulting object, and the
enclosed volume of it, i.e. the volume of the solid obtained from revolving the...
Homework Statement
Figure 4.46 shows the second derivative of h(x) for -2 \leq x \leq 1
a) Explain why h'(x) is never negative on this interval.
b) Explain why h(x) has a global maximum at x=1
c) Sketch a possible graph of h(x) for this interval.
I realize this is probably a fairly...
Homework Statement
On the circles y^2+x^2=1 and y^2+(x-3)^2=4
There is a line with positive slope that is tangent to both circles. Determine the points at which this tangent touches each circle.
Homework Equations
the derivative of the first circle i found:
y'=-x/y
the derivative of...
Oh my goodness! If I could hug you over the internet I would :P Thank you so much! I can't believe I didn't realize how simply this could be broken down...i think I was just overthinking it.
Homework Statement
In the attached diagram, the displacement of a follower (y) changes as the angle of the cam changes (\vartheta). The follwer has a smooth velocity over the entire path. Therefore, the velocity must match on both sides of the four points noted on the graph.
If we assume...
Homework Statement
Write the balanced net ionic equations for the reactions, if any that occur between:
NiS(s) & HCl(aq)
My attempt:
NiS(s) + 2HCl(aq) -> NiCl2(aq) + H2S(s)
NiS(s) + 2H + 2CL -> Ni(aq) + 2CL + H2S(s)
NiS(s) + 2H(aq) -> Ni(aq) + H2S(s)
My real question is...
Homework Statement
Suppose C(r) is the total cost of paying off a car loan borrowed at an annual interest rate of r%. What are the units of C '(r)? What are the units of C'(r)? What is its sign?
Homework Equations
C'(r)=dC/dr
The Attempt at a Solution
So, I figured:
C'(r) =...
Find a value of constant "k" so a limit to infinity exists
Homework Statement
Find a value of the constant k such that the limit exists.
Homework Equations
lim x to infinity of
x^3-6/x^k+3
The Attempt at a Solution
I started by setting the equation equal to infinity and attempted to...