Posts by fay
Total # Posts: 67
My school notes say : pH < pOH is acidic pH > pOH is basic Is this correct, I was thinking that if the pH is less than pOH than it was a basic solution
PartA: What volume of 10.0M NaOH is needed to prepare a buffer with a pH of 7.79 using 31.52 g of TrisHCl? TrisHCl is a weak base and the molecular weight is 157.67 g/mol. I found the solution, it is 6.67 milliliters. Part B: "The buffer from Part A is diluted to 1.00 L. ...
In a population of Mendel's garden peas, the frequency of green-flowered plants (genotype aa) is 49%. The population is in Hardy-Weinberg equilibrium. What are the frequencies of the AA and Aa genotypes? I got 9% AA, 42% Aa as my answer, is this correct?
How would I find the derivative of y=cotx with respect to x and also the answer should be in simplified form This is what I got: y= 1/tanx Y= cosx/sinx Idk what to do next
Yes.. So alkadiene is much more volatile than alkene?
Which has higher boiling point? A. Alkenes B. Alkadienes I think my answer would be A because it contains 1 double bond (1 pi bond)
Tca has greater acidity than acetic acid. Bcos of EAIE of 3 cl increases the positivity of carbonyl C making release of proton easier. Please explain. Why Cl increases positivity when Cl is infact an electronegative element
And also how would i know if the molecules or element in structure is either electrifilicity or nucleofilicity? For ex. Acetone. The carboxyl C is + and O is - but when you draw a canonical structure of it the H in ch3 became + and has double bond with carboxyl C. Why pls ...
My prof asked us the requisites for e delocalization. Sigma e delocalization -Must have c-h bond next to a sp2C Pi e delocalization -Must have sp3 lone pair attach to an sp2C. Prof said there are more requisites besides on what ive written. I think if it has high en? What is ...
Find the partial sum Sn of the arithmetic sequence that satisfies the given conditions. a2 = 5, a5 = 6.5, n = 15 S15 =
A couple needs a mortgage of $300,000. Their mortgage broker presents them with two options: a 30-year mortgage at 8 1/2% interest or a 15-year mortgage at 7 3/4% interest. (Round your answers to the nearest cent.) (a) Find the monthly payment on the 30-year mortgage and on ...
A man gets a job with a salary of $40,000 a year. He is promised a $1900 raise each subsequent year. Find his total earnings for a 10-year period.
Express the repeating decimal as a fraction. 0.156156156...
Find the first five terms of the given recursively defined sequence. an = 3an − 1 + 6 and a1 = 1 a1= a2= a3= a4= a5=
Why does Oxygen8 has 2 lone pairs? Please help
Suppose that $17,000 is invested in a savings account paying 5.1% interest per year. (a) Write the formula for the amount A in the account after t years if interest is compounded monthly. A(t) = (b) Find the amount in the account after 3 years if interest is compounded daily...
The half-life of krypton-91 ^(91Kr) is 10 seconds. At time t = 0 a heavy canister contains 6 g of this radioactive gas. (a) Find a function m(t) = m02^−t/h that models the amount of ^(91)Kr remaining in the canister after t seconds. m(t) = (b) Find a function m(t) = m0e...
When a solute dissolved in a solvent A. Freezing pt incrases B. Boiling pt increases C. Vapor pressure increases D. Concentration of the solvent My answer is B.
Law of partition means? I think it is distribution? How is this applied in extraction involvong immiscible solvent? Help please.
Ohh. Now i get it!! Thank you dr. Bob!
I have tried drawing it. But its still correct.. Ch3-ch(c2h5)-ch2-ch2-ch3 I don't see anything wrong about this.
2 ethylpentane My answer for this is a correct name and structure but my teacher said it is incorrect.. Why? Please explain.
A neutralisa tionreaction occurs when 120 millilitres of 0.5 mol/l lithium hydroxide(aq) and 160 millilitres of 0.375 mol/l and HNO3(aq) are mixed in a insulated Cup. initially the solutions are at the same temperature. If the highest temperature reached during the mixing with...
If the solubility of Ag2CO3 is 1.3×10^-4 mol/L what is the Ksp? I'm trying to do it but my answer I keep on getting is wrong and doesn't match the text book which is 8.8×10^-12
The distance to the nearest 100,000 km from the earth to the moon is given as 400,000 km. The average speed to the Nearest 500km/h is 3500km/h. Calculate the least and greatest time it takes the rocket to reach the moon I figured out the formula speed = distance / time ...
A healthy human body maintains a temperature of about 37.00C. Explain how physical, chemical and nuclear processes all contribute, directly or indirectly, to keeping the human body at a constant temperature.
compare and contrast what the authors identify as 21st century skills with what you would identify 21st century skills
A multiple-choice test consists of 29 questions with possible answers of a, b, c, d. Estimate the probability that with random guessing, the number of correct answers is at least 14. z-value (Use continuity correction)= Probability=
An airline company is considering a new policy of booking as many as 182 persons on an airplane that can seat only 160 (Past studies have revealed that only 80% of the booked passengers actually arrive for the flight.) Estimate the probability that if the company books 182 ...
Los estudiantes compran los libros
The Math-Is-Fun T-shirt Company manufactures and sells screen-printed t-shirts. The fixed costs of operation for the company are $75,750 per month. T-shirts are sold to wholesale buyers for $8.99 each, but only cost the company $3.20 each to produce. If the T-shirt Company ...
Find the area of some figure which have radius of 42cm and degree60
a die is rolled three times. find the chance that not all the rolls show 3 or more spots
A bag contains 7 blue marbles, 18 red marbles, and 16 orange marbles. Find the chance that neither draws are orange.
wat is a developmental achievement of a two-months-old infant? a. rolling from side to back b.Eruption of teeth c.Good control of head d. Turning toward the source of a sound 2. a condition often brought on by an allergic reaction is a. anemia b.diabetes c.asthma d.seizures
Explain how music and culture influence one another. Provide an ...
1) What were some of the irrational beliefs and attitudes that the characters displayed?
If a circle has a diameter of 7inches, what is the circumference rounded to the nearest whole number? Use pi=3.14
Is it a noun?
I nees help with infinitive phrases and if it is a noun, adj., or adv. My question is: The political prisoner refused to denounce his principles.
y= mc + b
what is the fact family for 10, 7 and 8
what is the fact family for 4,6 and 9
here is another question change the middle to make aother word for a brute (hint rhymes with out) thanks
change the first letter to mean a sort of attic no word mention english - Ms. Sue, Thursday, December 10, 2009 at 11:00pm What word are you supposed to use?
change the first letter to mean a sort of attic
no othe rword mention "quiet"
change one letter to make the opposite of quiet
Food and Nutrition
foods from animals legumes green and yellow vegetables fruits fats and oils fats and oils staples
what are the 5 main coastal features?
finding wat the wic program gets their funding.
is there any othe funding they get
Ok I thing the grands are calle fy's.
700 words paper evaluating the financial aspects of the Wic Program How do they fund their programs? o How reliable are their funding sources? o Do they implement financial accountability measures to ensure that funds are being used properly? o What questions would you ask the...
What can we learn about the Early Ancient Civilizations by reading works like The Epic of Gilgamesh?
freshwater resource challenge
Can somebody help with good resources for a research report on airplanes?
did you do this exam? can you please tell me how you did it? I am currently working on it now and it is really confusing. Thanks
Algebra 1: 8th Grade
y = xk
Discussion Question 2
How does the author of AIDS in Africa: Dying by the numbers organize information to build his argument? Does he include any counterarguments? Why or why not? What kinds of statistics, graphs, or illustrations does the author include? In what ways do these visuals strengthen ...