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Questions (17)
Acetic anhydride, C4H6O3, has a normal boiling point of 139.8 C (ie, at 1.013 bar) and a standard enthalpy of vaporization of
2 answers
597 views
What is the energy change per mole of lauric acid (C12H24O2) burned?
3 answers
541 views
What is the reaction quotient (Q) of:
C(graphite)+ CO2(g) = 2 CO (g)
2 answers
511 views
227 g of graphite and partial pressures of 2.00 bar CO2 and 125 bar CO are added to a sealed 1.00 L sealed container at 298 K.
7 answers
600 views
A popular volcano demonstration involves the thermal decomposition of ammonium dichromate: (NH4)2Cr2O7 (s) --> Cr2O3 (s) + N2
1 answer
500 views
Consider the reaction:P4 (s)+ 6 Cl2 (g) = 4PCl3(g)
Delt H = -1230 kJ How much heat is released when 52.5 of Cl2 (g) reacts with
4 answers
1,280 views
if h≠ 0, then (1/(x+h+1)-1/(x+1))/h=
please help me to understand this question and how to answer it.
1 answer
297 views
find how many real roots of, counting multiplicities x(x^2+16)(x^2-x-6)^2=0
please show how to get the answer. thank you
1 answer
301 views
the relationship between the graphs f(x) and -f(x) is:
a)a reflection about the line y=x b)a reflection in y-axis c)a reflection
2 answers
746 views
in the triangle below, sides PQ and AB are parallel. if |CP|=3, |CA|= 5 and |CB|=2 find |CQ|
a) 3/2 b)6/5 c) 3/5 d)5/3 e)5/2 I
3 answers
356 views
If the frequency of hemophilia, an X-linked recessive disease, is 10% in males, what is the frequency of females with
2 answers
503 views
10 ml of 0.5 M NaOH is added to 100 ml of 0.2 M formic acid , containing no formate anion.. (the pka of formic acid is 3.75) the
4 answers
585 views
30 mL of 1 M HCl were added to 200 mL of 0.1 M lysine solution having pH = pKa of the side-chain amino group. What is the new
1 answer
392 views
What is the pH of a 100 mL solution of 100 mM acetic acid at pH 3.2 following addition of 5 mL of 1 M NaOH? The pKa of acetic
5 answers
682 views
For any enzyme that follows simple Michaelis-Menten kinetics, when the initial Velocity of the reaction is 80% of Vmax what is
4 answers
1,078 views
When glucose-6-phosphate and fructose-6-phosphate are mixed with the enzyme phosphohexose isomerase under standard conditions,
2 answers
511 views
Use the chart to answer the question.%0D%0ABased on the chart, how did westward expansion affect slavery in the United States
1 answer
123 views
Answers (11)
How did you get - 0.2 from?
Thank you for your help! @DrBob222
The pka=4.70 And the answer for new ph= 4.75
30 mL of 1 M HCl were added to 200 mL of 0.1 M lysine solution having pH = pKa of the side-chain amino group. What is the new pH? pKa values for lysine are 2.18, 8.95 and (R-group) 10.53. Answer is suppose to be 5.57
but....0.74/6*1230= 0.74/7380=0.000100271 moles..
I used what you have suggested ΔG= ΔH-TΔS 120.0 kj= 173.5 kj- 298K ΔS ΔS= -0.96386 kj x1000J ΔS= -963.86 J so it will be spontaneous, more products than reactants. correct me if i made any mistakes, thank you for the guidance.
Correction for b) ΔG= ΔG°+RTIn(Q)
This is the full question: C(graphite) + CO2 (g) ⇌ 2 CO (g) ΔH°= 173.5 kj ΔG°= 120.0 kj a) Provide the expression for the reaction quotient Q, for this reaction: My answer: Q= [CO] ^2 / [CO2] b) 227 g of graphite and partial pressures of 2.00 bar CO2
C(graphite) + CO2 (g) = 2 CO (g) K= (2.00)^2/ 125 K= 0.032 deltaG= -RTInK = -(8.214)(298) In(0.032) = 8527.85 J = 8.527 kJ I am not sure if this is the correct answer, please correct me if I am wrong.
25462
My daughters homework asks us to find the product by factoring the tens. The problem is 6 x 2, 6 x 20 and 6 x 200. I see how to do 6 x 2 (memory factor) and the 6 x 20 would be (6 x 2) and (1 x 10) then 12 x 10 = 120 but how does he show his work for 6 x
