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Posts by jessica

Total # Posts: 3,320

english
D?

english
She attributed his shallowness to his luxurious upbringing, in which material comforts like fine clothes and large homes nurtured his sense of privilege. Which of the following is the meaning of "material" as used in the sentence above? A. The substance from which ...

english
The store will stay open later during the holiday season. The store will stock a variety of seasonal merchandise. The store will have many discounts available for holiday shoppers. 22. When revising the paragraph above, the writer should address which of the following? A. ...

Chemistry
At the start of the process 118 kg of isobutylbenzene is used and the overall yield of the 3 reaction steps is 24%, how many 400 mg tablets of ibuprofen will be produced? Isobutylbenzene: Chemical formula = C10H14 Molecular Weight = 134.22g 2-(4-isobuytlphenyl) propanoic acid ...

Chemistry
Choccamine and mintanol have Rf values of 0.81 and 0.21 respectively. What would the distance in centimetres (cm) between the two compounds be if the TLC was run on a TLC plate where the solvent front moved 8.9 cm from the baseline?

Science
I think it uses a renewable source

science
that is right

History
Who did Lincoln command as the first "General of the Union army"

math for college readiness
Suppose y varies directly with x. Write an equation relating x and y. y = −30 when x = 6

Science 6th Grade answers
The of the answers are 1.A 2.B 3.D 4.C

English
Would knowledge be considered a theme in Anthem by Ayn Rand?

Chemistry
Yes I got 0.996% and rounded. Thanks very much for your help!

Chemistry
I understand what you are talking about now because I did not factor in the 94mL. I have added this step in and now got 1.00%

Chemistry
I thought I already had moles though? Which was 0.017 Mol?

Chemistry
Okay so this is my process: Mass of Vanillin (C8H8O3) = molar mass x moles 152.15 x 0.017 = 2.59g Mass of Vanillin = 2.59g Mass of Vanilla pods = 24.41g % of vanillin in vanilla pods: (2.59 / 24.41g) x 100 = 10.61% Does this sound right?

Chemistry
A 94 mL vanillin solution with a concentration of 0.017 mol L-1 was made by extraction from 24.41 g of vanilla pods. Calculate the percentage of vanillin in the vanilla pods. It would be helpful if you could explain to me the process to work out this question instead of just ...

English
We had a chart from A-Z for Anthem by Ayn Rand. For each letter much be at least rhetorical device or a mood or tone. I need help with letters K, Q, W, V, X, Y, Z

math
Which answer was correct?

Chemistry
Consider the reaction: M + 2HCl ¨ MCl2 + H2 When 0.85 mol of the metal, M, reacted with an aqueous HCl solution (the HCl is in excess), the temperature of the solution rose because the reaction produced 6795 J of heat. What is ∆H in kJ per mol of M for this ...

English
What are some analogies in Anthem by Ayn Rand from chapters 9-12

Pre-Calculus
At 34 degrees north latitude, the longest day of the year has 14.273 hours of daylight, and the shortest day 9.726 hours. If the equinox falls on march 21(day 80), model the hours of the daylight by day?

Algebra
1.0<x<1. Which must be true? I. x^9 < x^7 II.x^7+x^5 < x^6+x^4 III. x^7-x^5 < x^6-x^4 2. A football team average x points (the mean) in the first n games, scored y points in the next game, and z points in the one after that . The mean of the n+2 is A.(x+y+z) / (...

linear
Suppose that we have a system consisting of two interconnected tanks, each containing a brine solution. Tank A contains x(t) pounds of salt in 200 gallons of brine, and tank B contains y(t) pounds of salt in 300 gallons of brine. The mixture in each tank is kept uniform by ...

Hallandale high
^ excuse me bob?!

Chemistry
4.18

Chemistry
Determine the pH of a solution of 12.00 mL of 0.2 M acetic acid with 10 mL of a 0.025M NaOH? (Ka = 1.8E–5) I've calculated my excess moles of acetic to be .00215. Total volume being .022L. Where do I go from here? Thanks!

4th Math
Sam cut the pic into 6 sides

math
Use Part 1 of the Fundamental Theorem of Calculus to find the derivative of the function. g(x) = e^(3t^2) − 3t dt from 4 to x

Physics
i usually go with B if I don't know

Chemistry
Okay so in our class we did an ice cream lab where we use Ziploc bags to make ice cream. We made an ice cream mixture and then put it into a smaller Ziploc bag. Then we got a large Ziploc bag and placed ice in it and placed the bag with the ice cream mixture into the large bag...

Chemistry
If 0.605 g of magnesium hydroxide reacts with 1.00g of sulfuric acid, what is the mass of magnesium sulfate produced? Mg(OH)2(s)+H2SO4(l)→MgSO4(s)+H2O(l) .605g Mg x 1molMgSO/1molMg=.605g MgSo 1.00g MgSO/1mol H2SO4=1.00g MgSO .605g+1.00g=1.605g This is incorrect, but I ...

Strategies for the Independent Learner
your answer is so rude

Strategies for the Independent Learner
When you approach a text, you should A. survey it, using the technique called SQ3R. B. dive right in at the first page and read the assigned section. C. skip over words you don’t know. D. read only the boldface type. 2. The proctored exams for your degree courses are A. ...

Social Studies PLS. Help
they are correct

1 st grade
prentend that it grandma

1 st grade
a wolf

ela
what does Little Red Riding Hood meet as she walks through the woods? What problem or conflict does this character present?

1 st grade
why does little red riding hood go for a walk in the woods?

Chemistry
I think that: Phe = remain at origin (1) Asp = migrate towards positive electrode (2) His = migrate towards negative electrode (3) Is this correct?

Chemistry
I know that the pI (isoelectric points) for each amino acid are as follows: His = pI 7.64 Asp = pI 2.98 Phe = pI 5.91 So I think that Phe will bear no net charge at 5.91 and will remain at the origin because it is at the pH where it is likely to be attracted to a positive or ...

Chemistry
The electrophoresis of a mixture of histidine (His), aspartic acid (Asp) and phenylalanine (Phe) is carried out at a pH of 5.91. Match the amino acid to its predicted behaviour under electrophoresis at that pH. 1. This amino acid will bear no net charge at pH 5.91 and so will ...

Chemistry
The electrophoresis of a mixture of histidine (His), aspartic acid (Asp) and phenylalanine (Phe) is carried out a pH of 5.91. What amino acid will This bear no net charge at pH 5.91 and so will remain at the origin, carry a net negative charge at pH 5.91 and so will migrate ...

Chemistry
An aqueous solution of a monoprotic acid is prepared. This acid is known to have a pKa of 8.6. If the acid is 37.5% ionized when in solution, what is the pH of the solution? Not really sure where to start with this question? Thanks in advance

Math
How do you write a graph to represent the function x=0,1,2,3 y= 1,4,7,10

Math
What is the funtion rule shown in the table n 3,4,5,6 y 2,1,0,-1

Chemistry
calculate oh- and ph in a solution in which dihydrogen phosphate ion is 0.335 M and hydrogen phosphate is 0.335 M. This is a homework question, where I have the solution, which is 0.335/0.335, which I get, but then I am supposed to multiply this (1)by a number 6.2x10-8? I have...

Math.
5.C

algebra
You are making a fence for your garden. The length is five less that two times the width. A.write a polynomial that represents the perimeter of the garden. B.write a polynomial that represents the area of the garden. C. Find the perimeter and area of the garden when the width ...

Science
What were the answers? PLEASE HELP ME!!

us history
sorry i was gonna type more

us history
Did the south have railroads?

Health P.2
its not d i answerd d and got it wrong!

math.
I get 0.469 but i don't think it is right

math.
Kool Klothes has determined that the revenue function for selling x thousand pairs of shorts is R(x) = -5x^2 + 21x. The cost functiom C(x) = 2x + 10 is the cost of producing the shorts. A) How many pairs of shorts must the company sell in order to break even. Do i use the ...

math is my answer correct
How did you get 337.66, i still get 337.59

Chemistry
Well I'm in Chemistry that's why I put it under that :/

Chemistry
There is a picture of a brick lying face down and one standing straight up. The question asks: Is each brick exerting the same force? Explain. I know that they are exerting the same force, but I don't understand why and how to explain it?

Coding
This 23 year old female is brought into the emergency department after being found by her collage roommate. Sometimewithin the last hour and a half after th roommate left, the patient ingested her intire bottle of verapamil (estimated at over 20 pills) as a suicide attempt, ...

chemistry
whoever answered that, God bless you.

chemistry
Write a balanced chemical equation for the neutralization reaction between aqueous hydrochloric acid and aqueous calcium hydroxide. Be sure the formulas are written correctly before balancing, and include phases. HCl+H2CaO2 im not sure that's written correctly but that is ...

Math
42/6=7

Chemistry
Figured it out. I didn't know I had to put parentheses around the 1/3 when I was raising it to the 1/3 power. So I input 12.5^(1/3), and then got the correct answer. Thanks!

Chemistry
I appreciate the help, but I don't have a y^x button on my calculator, I have a TI-83 Plus. Is there an equivalent button?

Chemistry
At 500 degrees celsius, K for the formation of ammonia from nitrogen and hydrogen gases is 1.5x10-5. N2(g)+3H2(g)->/<-2NH3(g) Calculate the equilibrium partial pressure of hydrogen if the equilibrium partial pressures of ammonia and nitrogen are 0.015 atm and 1.2 atm, ...

Chemistry- Electrochemistry
Calculate the activity of KI, x, in the following electrochemical cell if the potential is +0.294 V Ag | AgCl(s),NaCl(aq,0.1) ||KI(aq, x),I (s) | Pt

math
To solve this equation first what you have to do is isolate the variable and its coefficient(3). So what you have to do is first add 6 to each side of the equation ( remember you have to do the opposite operations.) Then you would be left with 3y=26. Next what you do is divide...

Math
Thanks so much! This helped a lot

Math
Plane A leaves the airport. One hour later, Plane B leaves the same airport on the same course. It catches up to Plane A in 2.5 hours. The average speed of Plane B is 300km/h faster than Plane A. Find the speed of each plane.

Chemistry
A certain reaction has an activation energy 52.93 kJ/mol. At what kelvin temperature will the reaction proceed 8.00 times faster than it did at 315K? Ea = 52.93 kJ/mol = 52930J R (gas constant) = 8.314 T1 = 315K k1 = rate constant at T1 T2 = ? k2 = rate constant at k2 = 8.00 ...

math
2*x+y=4.82 0.5x+2y=2.29 Multiply the second equation (0.5x+2y=2.29) by 4 and take away the x. 2*x+8y=9.16 Subtract 2*x+y=4.82 from 3 7*y=4.34 y=4.34/7=0.62k The cost would be 0.62k. Hope that helps! :)

Art
Timothy what do you mean? he didnt say 2 was b and e isnt even a choice

calc
At noon, ship A is 150 km west of ship B. Ship A is sailing east at 35 km/h and ship B is sailing north at 30 km/h. How fast is the distance between the ships changing at 4:00 PM?

Geometry
The correct answer is b. 810 cm^3

Physical science
Two rectangular blocks are stacked on a table. The upper block has a mass of m2 and the lower mass is m1 > m2. The coefficient of kinetic friction between the lower block and the table is ųk. The coefficient of static friction between the two blocks is ųk. A ...

Math
At & T has a cell phone plan of $25.00 a month plus 30 cents per minute. There is a one year contract wit a new phone for $19.99 Can someone put this into a equation for me.

Chemistry
Light from three different lasers (A, B, and C), each with a different wavelength, was shined onto the same metal surface. Laser A produced no photoelectrons. Lasers C and B both produced photoelectrons, but the photoelectrons produced by laser C had a greater velocity than ...

Art Help!!! Thank you
Are you in online school

Chemistry
A reaction proceeds with ∆ H = 40 kJ/mol. The energy of activation of the uncatalyzed reaction is 120 kJ/mol, whereas i t is 55 kJ/mol for the catalyzed reaction. How many times faster is the catalyzed reaction than the uncatalyzed reaction at 25°C?

Art
Yes its D

BioMechanics
You have a subject (height = 150 cm, mass = 85 kg) lying prone on a moment table with their feet pressed against the foot rest. Assuming that you zeroed the scale before the subject got on the table, the scale now reads 40 kg. Where is the centre of mass (relative to the feet...

Physics
I don't get this question still! please help

History
How did Deism, the Second Great Awakening, continued denominational fragmentation, and Mormons shape American religious life?

calc
derivative of y=4^(6-x^2)

social studies. NEED HELP ASAP
thax

Science
?????? is right!! 4/4 100% thanks!! my mom was gonna take my phone if I didn't get a 100!!!

pre cal 11
thank you

pre cal 11
i am stuck at a question that is asking for the common difference, first term, and general term for the arithmetic sequence the question is t10=50 and t27=152 i found my d=6 and t1=(-4) so know my equation is: tn=(-4)+(n-1)6 i had asken my teacher to tell me what the general ...

pre cal 11
oh my god thank you i makes sense now

pre cal 11
hi so i am stuck at this question that is asking about arithmetic sequence . Five fence posts are equally spaced between two corner posts that are 42 meter apart. how far apart are the five fence posts. i know the answer is 7m but i don't know how plus i know the equation ...

linear
If possible, solve the following linear systems by Cramer's rule. 2x1 + 4x2 + 6x3 = 14 x1 + 2x3 = 0 2x1 + 3x2 − x3 = 30 i am having trouble with this one

Math
I have the same question for my homework. I am solving it now so i hope this helps you. First of all, George has already read 3 chapters of a 27 chapter book. On the second night, he read 8/27 of the book. In order to make 3/27, which came from the amount of chapters George ...

Algebra 1
There is a state soccer tournament with 128 teams competing for 1st place. Each week, half of the teams get eliminated. How many teams remain after 6 weeks? A. 16 B. 8 C. 4 D. 2

Health
yeah

Chemistry
A solution of 0.200M NaOH (14.0 mL) is mixed with 42.4 mL of 0.170M HNO3. Assuming the final volume is the sum of the initial volumes, what is the molarity of Na+ cation and NO3- anion? I do not know where to start to solved for the molarity of the ions. Please help !

science
A solution of 0.200M NaOH (14.0 mL) is mixed with 42.4 mL of 0.170M HNO3. Assuming the final volume is the sum of the initial volumes, what is the molarity of Na+ cation and NO3- anion? I do not know where to start to solved for the molarity of the ions. Please help !

math
Let y = integrate from 1-9x to 1 of (u^3)/(1+u^2) What is y'? I flipped the integral so it's 1 to 1-9x and had the derivative of -9 via chain rule so -9 and just plugged in 1-9x to the (u^3)/(1+u^2) so it's -9*((1-9x)^3)/(1+(1-9x)^2). It tells me what's wrong; ...

English
Can you help me annotate this prompt? I don't know really how to do it? In the following passage from the scarlet letter the narrator describes Hester Pyrnne in her isolation from Puritan community. In a well organized essay, analyze the language and rhetorical devices the...

english language
WRITE THE DEBATE

math-urgent
show that if A= A inverse, then det(A) = +/- 1 if A(transpose) = A(inverse), what is det(A)?

Finance
Given an interest rate of 6.25% compounded annually, how much would you accumulate if you started with $3,250 and then contributed $1,950 per year (at the end of each year) for 13 years? Is this correct? Calculate each FV and sum? PV1 = 3,250 i = 6.25% N = 13 FV = PV2 = 1,950 ...

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