Question

2) How to make 0.05%, 0.10%, 0.20, 0.30% and 0.40% (g/10ml), W/V ethanol standards

Answer #1

a) 0.05 %

100 ml of solution contain 0.05 g of ethanol

10 ml will contain = 0.05 x 10 / 100 = **0.005
g**

b) 0.10 %

100 ml of solution contain 0.10 g of ethanol

10 ml will contain = 0.10 x 10 / 100 = **0.01
g**

c) 0.20 %

100 ml of solution contain 0.20g of ethanol

10 ml will contain = 0.20 x 10 / 100 =
**0.020g**

d) 0.30 %

100 ml of solution contain 0.30 g of ethanol

10 ml will contain = 0.30x 10 / 100 = **0.030
g**

e) 0.40 %

100 ml of solution contain 0.40 g of ethanol

10 ml will contain = 0.40 x 10 / 100 = **0.040
g**

I.
1) how to make a 0.5N perchloric acid 4ml?
2) How to make 0.05, 0.10, 0.20, 0.30 and 0.40 (g/10ml), W/V
ethanol standards

2 SHOW ALL WORK STEP BY STEP WITHOUT SHORT CUTS
1) make a solution of 0.25% n-propanol (use 10 ml volumetric
flask)
2) make a water solution of methanol and isopropanol of 0.2%
make it in the same container and in separated container.
3) make a 50ml stock solution of 0.50 wt% ethanol .
4) make five solution ranging from of ethanol 0.0 %, 0.05%,
0.10%, 0.20,% 0.30% 0.40% 0.50% wt% in water. (Used 10ml volumetric
flasks)

A solution is 2.00% (w/w) in ethanol and has a density of
1.10g/mL. How many grams of this solution are required to be
transferred into a 250.0mL volumetric flask (and then diluted with
solvent) to make a new solution that is 2.50x10^-2 M in
ethanol?

For the reaction, A(g) + B(g) => 2 C(g), the following data
were obtained at constant temperature.
Experiment
Initial [A], mol/L
Initial [B], mol/L
Initial Rate, M/min
1
0.10
0.10
2 x 10-4
2
0.30
0.30
5.4 x 10-3
3
0.10
0.30
1.8 x 10-3
4
0.20
0.40
6.4 x 10-3
Which of the following is the correct rate law for the
reaction?
1.
Rate = k[A][B]
2.
Rate = k[A]2[B]
3.
Rate = k[A]2[B]2
4.
Rate = k[A]
5....

Graph Theory
Prove that if G is a graph with x(G-v-w)=x(G)-2 for every pair
of vertices v and w in G, then G is complete.
Hint: assume G is not complete.

How would you make 450 g of a 1.500% w/w KCl solution in
water?

How many g of a solute are in 2 kg of 10% (w/w) solution?

Pallets of Cake Mix Demanded
Probability
Cumulative
Probability
Fewer than 2
0.10
0.10
2
0.30
0.40
3
0.55
0.95
4
0.04
0.99
5
0.007
0.997
6
0.003
1.00
Sum:
1
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Consider the probability distribution shown below.
x
0
1
2
P(x)
0.05
0.50
0.45
Compute the expected value of the distribution.
Consider a binomial experiment with
n = 7 trials
where the probability of success on a single trial is
p = 0.10.
(Round your answers to three decimal places.)
(a) Find
P(r = 0).
(b) Find
P(r ≥ 1)
by using the complement rule.
Compute the standard deviation of the distribution. (Round your
answer to four decimal places.)
A...

Sample #
2.5 mM NPP (mL)
NaCitrate buffer (mL)
water (mL)
1
0.10
2
2.4
2
0.20
2
2.3
3
0.30
2
2.2
A) make a plot of Absorbance 405 nm vs time for each substrate
concentration, displaying all 3 samples on the same plot.
B) fit each data set to a trendline
C) using the slopes from the trendlines in part B and the slope
from your standard curve, convert your slopes into enzyme velocity
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