Monday
April 27, 2015

# Posts by Jess

Total # Posts: 880

chem 2
For 520.0mL of a buffer solution that is 0.140M in HC2H3O2 and 0.125M in NaC2H3O2, calculate the initial pH and the final pH after adding 0.020mol of HCl
April 23, 2015

english
WHAT ARE FEATURES OF A SHAKESPEARIAN COMEDY? ANSWER QUICKY PLEASE I NEED IT IN THE NEXT 10 MINUITES PLEASE.
March 25, 2015

Physics
We want to find how much charge is on the electrons in a nickel coin. Follow this method. A nickel coin has a mass of about 5.7 g. a. Find the number of atoms in a nickel coin. Each mole (6.02 × 10^23 atoms) has a mass of about 57.9 g. Answer in units of atoms. b. Find ...
March 10, 2015

Physics
b. Find the force on q1. Answer in units of N c. If an object contains the same number of electrons as protons, it is said to be 1. negatively charged. 2. neutral. 3. positively charged. 4. energized.
March 10, 2015

Physics
A charge q1 = 5 µC is at the origin, and a charge q2 = 4 µC is on the x axis at x = 6 m. Find the force on charge q2 . The Colulomb constant is 8.98755 × 10^9 N·m^2/C^2. Answer in units of N.
March 10, 2015

Physics
A strong lightning bolt transfers about 21.45 C to Earth. How many electrons are transferred? The elemental charge is 1.602 × 10^−19 C.
March 10, 2015

LA
What part of speech is idle in this sentence? "The kids are left idle with nothing to do."
February 27, 2015

physics 100
An aluminum wing on a passenger jet is 30 m long when its temperature is 20°C. At what temperature would the wing be 5 cm (0.05 m) shorter?
February 26, 2015

statistics
In a course there is a midterm exam, worth 40% of the course grade, and a final exam worth 60%. On the midterm the mean grade was 80 with a standard deviation of 10, and on the final the mean was 75 with a standard deviation of 15. The correlation between the two exams is 0.6...
February 25, 2015

Chemistry
A piece of iron (Cp = 0.450 J/(gi°C)) that has a mass of 21.5 g and an initial temperature of 100.0°C is submerged in X g of water (Cp = 4.184 J/(gi°C)) at 20.0°C. The temperature of the system (iron and water) changes to 21.4°C. What is the value of X?
February 22, 2015

Physics
A car and driver weighing 7740 N passes a sign stating “Bridge Out 27.7 m Ahead.” She slams on the brakes, and the car decelerates at a constant rate of 12.3 m/s^2. The acceleration of gravity is 9.8 m/s^2. What is the magnitude of the work done stopping the car if ...
February 14, 2015

Geometry
Quadrilateral GHIJ is a scale drawing of quadrilateral ABCD with a scale factor r. Describe the following statements as always true, sometimes true, or never true, and justify your answer. a. AB/GH = BC/HI b. perimeter (GHIJ) = r * perimeter (ABCD) c. Area (GHIJ) = r * area (...
February 13, 2015

Physics
A 65.0 kg ice skater moving to the right with a velocity of 2.5 m/s throws a 0.15 kg snowball to the right with the velocity of 32.0 m/s relative to the ground. a. What is the velocity of the ice skater after throwing the snowball? disregard the friction between the skates and...
February 10, 2015

Chemistry
If 3.0 liters of oxygen gas react with excess carbon monoxide at STP, how many liters of carbon dioxide can be produced under the same conditions? 2 CO (g) + O2 (g) ---> 2 CO2 (g)
February 4, 2015

statistics
The following contingency of frequencies is based on a 5-year study of fire fatalities in Maryland. For purposes of clarity, columns and rows are identified by the letters A-C and D-G, respectively. Blood Alcohol Level of Victim A B C Age 0.00% 0.01-0.09% ¡Ý0.10% ...
January 31, 2015

linear equation
john invested \$4000 into stocks(s) and bonds(b). The stocks earned 7% interest. the bonds earned 9% interest. if the investment earned \$300, how much money did john have in stocks and bonds. my question- how do I write this formula so I can find the answer
January 22, 2015

history
I think the answer is C
January 19, 2015

history
15. The Articles of Confederation called for which of the following? A. The right of the legislature to assess taxes B. The Northwest Ordinance C. A single legislative body D. A chief executive
January 19, 2015

Geometry
Write a proof. 1. Prove: If the diagonals of a parallelogram are perpendicular, then the parallelogram is a rhombus. 2. Prove: If the diagonals of a parallelogram are congruent, then parallelogram is a rectangle.
January 16, 2015

bookkeeping
the amounts that increase the cash account are entered in what column?
December 8, 2014

chem
A weak acid, HA, has an ionization constant of 9.29 x 10-6. If we prepare a solution that is 0.727 M in HA what percent of the acid will be ionized?
November 30, 2014

chem
The Ka of an acid is 6.3 x 10-8. To the nearest one hundredth, what is its pKa
November 30, 2014

Chemistry
1. Write a balanced molecular equation for the reaction of solid AgNO3 with aqueous NaCl. Be sure to include the correct number of coefficients and the state of the species (aq, s, l or g). 2. Write the total ionic equation for this reaction, including all physical states. 3. ...
November 26, 2014

Chemistry
1. A combination reaction may also be a displacement reaction. True or False 2. The combustion of an element is always a combination reaction. True or False For number 1, I first thought true, but then again, nothing is being displaced in a combination reaction, right? You are...
November 19, 2014

Physics
Mass 1 with a unknown mass starts at rest at the top of a frictionless from a height of 13 meters. It then slides down the incline and moves over a horizontal frictionless surface and collides inelastically (head on) with mass 2 which is 25.4 kg and initially at rest. After ...
November 11, 2014

Chemistry
Sorry for the double post. Just saw that my original question actually posted though I was told it had not.
November 1, 2014

Chemistry
A 0.2800 g sample of an unknown acid requires 28.22 mL of 0.1199 M NaOH for neutralization to a phenolphthalein point. a.) How many moles of OH- are used? b.) How many moles of H+ are found in the acid? c.) What is the calculated equivalent molar mass of the unknown acid? If I...
November 1, 2014

Chemistry
A 0.2800 g sample of an unknown acid requires 28.22 ml of 0.1199 M NaOH for neutralization to a phenolphthalein end point. a.) How many moles of OH- are used? b.) How many moles of H+ are found in the acid? c.) What is the calculated equivalent molar mass of the unknown acid? ...
October 31, 2014

Math
In three successive years the price of the common shares of Bedrock Resources Ltd. fell 40%, 60%, and 70% ending the third year at 50 cents. a. What was the share price at the beginning of the three-year skid? b. How much (in dollars and cents) did the share price drop in the ...
October 27, 2014

STATISTICS HELP!!!!!
That's what I got is it correct?
October 24, 2014

STATISTICS HELP!!!!!
a. 0.214 b. 0.787
October 24, 2014

STATISTICS HELP!!!!!
Bender Electronics buys keyboards for its computers from another company. The keyboards are received in shipments of 175 boxes, each box containing 30 keyboards. The quality control department at Bender Electronics first randomly selects one box from each shipment and then ...
October 24, 2014

Science Density
Water has a density of 1.0g/cm3. Aperson sits in a bath 150cm in length and 90 cm width. Thw water had a depth of 60cm befor the person sat in the bath. after sitting in the bath the water level rose to 68cm. Calculate the mass of the person, giving your answer in kg.
October 22, 2014

Science -Density
gold has a density of 19.30 g/cm3 . What si the mass of a bar of gold 15 cm x5 cm x 8 cm
October 22, 2014

Chemistry
Use standard enthalpies of formation to determine ΔHorxn for: 2C2H2(g) + 5O2(g) → 4CO2(g) + 2H2O(l) Enter in kJ.
October 21, 2014

S.S.
The answer to 12 is Alexander Hamilton
October 18, 2014

College question
I did my personal essay but I'm not sure if that's the one I'll be submitting. I might rewrite it. I'm applying to city college, hunter, university at buffalo, pace university, binghamton university, le moyne college, st.john's university, and hofstra ...
October 9, 2014

College question
I checked and it said they accept scores between 1660 and 1980, so I don't think they really look at writing. And for the transfer students they don't look at sat or act scores
October 9, 2014

College question
My math score was 570 Writing 570 Reading 550
October 9, 2014

College question
Thank you!
October 9, 2014

College question
Sorry, Stony Brook University
October 9, 2014

College question
I'm a high school senior and I'm planning on applying to SBU. I have a 4.0 gpa, a 1690 on the SAT(am going to retake), a 24 on the ACT, took 3 AP classes and am currently taking 2 more, part of National Honor Society, in the top 5% of my school, have an advanced ...
October 9, 2014

Algebra 1
I have been trying to figure out how to solve multi-step equations. Such as 1/2x+1/4x=16. How do you solve these? I can't seem to figure it out.
September 29, 2014

Finite
A box contains 8 blue balls, 3 white balls, and 5 red balls, and that we choose two balls at random from the box. What is the probability of neither being blue given that neither is white?
September 25, 2014

CHEMISTRY
How to determine direction of polarity? For instance im studying from a practice quiz, an it says that in CH3OH the oxygen is slightly negative, which is understandable as its next to F. but then it says the H is slightly positive. why the H and not the carbon which is two ...
September 24, 2014

Organic Chemistry
Label each reactant according to it role or roles in the chemical reaction? Two different (OH-) + (HBr) ----> (HOH) + (Br-) (OH-) + (H3CBr) ----> (H3COH) +(Br-) Lewis base, bronsted base, nucleophile, lewis acid, bronsted acid, nucleophile
September 15, 2014

Organic Chemistry
Consider the resonance structures for the carbonate ion. O--C-O(-) l O(-) (-)O-C--O l O(-) (-)O-C-O(-) l l O How much negative charge is on each oxygen of the carbonate ion? A)0, B) -.33, C)-.50, D) -.67, E)-1.00, F)-1.33, G)-1.50, H)-1.67, I)-2.00 What is the bond order of ...
September 15, 2014

CHEMISTRY
if you copy the link from beginning to end itll paste easily into a search bar.
September 7, 2014

CHEMISTRY
Ch3CN(CH3)C2H5 is my kekule drawing ok? I drew it and uploaded a picture. oi61. tinypic . com/2vmztir.jpg
September 7, 2014

calc
Two paths represented by [x, z] = [-82.2, 43] +s [0.2, 1.7] and [x, y] =[-84.4, 45.5] +t [2.4 -0.9]. Determine the intersection of the two paths.
July 6, 2014

Chem URGENT
How much energy (in kilojoules) is released when 13.3g of steam at 114.5∘C is condensed to give liquid water at 67.0∘C? The heat of vaporization of liquid water is 40.67 kJ/mol, and the molar heat capacity is 75.3 J/(K⋅mol) for the liquid and 33.6 J/(K⋅...
June 17, 2014

Pre-Algebra
How would I also solve the following? f(x)=x^2-4+3 what is the output of f(-3)?
June 3, 2014

Pre-Algebra
n(n-1)-4 How do I solve stuff like this?
June 3, 2014

English
This piece focuses on the increase use of smartphones of youths in South Korea. Should I reword that phrase?
May 14, 2014

math
A Jewlery box has length of 3 and a half, a width if 1 and a half, and a height of 2 units. What is the volume if the box I cubic units? Each of the cubes in this activity has a side length of 1/2. How many cubes with side length 1/2 does it take to form a unit cube? How many ...
May 6, 2014

us history
can you check my answers please? The “silent majority” referred to A. conservative working- and middle-class citizens B. women C. a liberal coalition of ethnic minorities, women, the aged, and the poor D. the nation’s youth E. deaf-mutes in government programs I...
April 28, 2014

Class Board
Characteristics and talents that will make me a great leader and member of Class Board is that I am helpful. Helping with homework, simple tasks, struggles that one faces, or providing ideas is a way of how I exemplify this characteristic. I also enjoy doing volunteer work. ...
April 24, 2014

Class Board
Would volunteering be considered as a talent/characteristic?
April 24, 2014

Class Board
What characteristics and talents in addition to these do you possess that will make you a great leader and member of the class board and how do you exemplify those? I don't really understand the part where it says "exemplifies" what does that mean?
April 24, 2014

Geometry
In a garden, a birdbath 2ft 6 in. tall casts an 18-in. shadow at the same time an oak tree casts a 90-ft shadow. How tall is the oak tree?
April 14, 2014

english essay
Ofcourse, I know Science and Chemistry are not issues but I want to know an issue related to this particular subject.I do not If you understood or not.
March 26, 2014

english essay
* I need help writing research essay. The topic is to write about an issue or problem that you want to change. Well, I am mostly interested in Science, particularly Chemistry and Nature.
March 26, 2014

Math
the directions for lemonade say to put 2 cups of liquid concentrate into one gallon of water. if olivia only wants to make one pint of lemonade, how many fluid ounces of concentrate should she put?
March 23, 2014

biology
I need help with what is happening inside the mitochondria. may help me what's happening 0-50 secondes. h t t p: // w w w.y o u t u b e.c o m / watch ?v=RrS2uROUjK4
March 21, 2014

Chemistry
What is the pH of a solution whose [H3O+] is 1 X 10 -6 M?
March 11, 2014

Pre-Algebra
I don't have an account. It says that you need one
March 7, 2014

Pre-Algebra
How do you find the surface area of cones and cylinders?
March 7, 2014

history
As president, Grover Cleveland antagonized A. Western cattlemen and businessmen by restoring many acres of public lands to the federal government B. Democrats by putting many of his fellow Republicans into political positions C. Mugwumps by allowing “pension raids” ...
March 1, 2014

us history
The intellectual leader of the Social Gospel in America was my book speaks of William Rainsford, Washington Gladden, and Walter Rauscchenbusch but doesnt say who the actual leader is?
March 1, 2014

us history
Urban political bosses were often the largest source of assistance for city dwellers. true or false? this is true right?
March 1, 2014

us history
The growth of the railroads was a major cause of American expansion in the late nineteenth century. true or false? is this true?
March 1, 2014

English
correct the following sentence: elvis our cat play with his toy and then he played on the scratching post There are 6 errors but I could only find 5. Elvis, our cat played with his toy, and then he played on the scratching post.
February 25, 2014

Math
It is composed of 12 regular pentagonal faces.
February 19, 2014

math
thank you :)
January 17, 2014

math
Four runners ran the relay, Bill ran his lap in 22.738 seconds, Troy ran in 21.874 seconds, Grace ran in 20.32 second, and Jessica ran 19.047 seconds. Estimate the team's total time to the nearest tenth of a second
January 17, 2014

math
ok so it would be 4.25, 5, 6.5, 7.25
January 17, 2014

math
complete the sequence of numbers 4.25, 5, 5.75, _______, ______ ?
January 17, 2014

math
Writing to explain: The digit 5 is usually rounded up, but it can also be rounded down. How would you round the numbers in the equation 9.5 +4.7+3.2+7.5= to the nearest whole number without getting an overestimate or an underestimate?
January 17, 2014

business math
compute the amount of compound interest earned in 1 year for an investment of 1,000,000 with a nominal interest rate of 8% compounded quarterly.
January 13, 2014

Science
for the question 17 the answer is heat
January 10, 2014

law
judges in custody cases may interview the subject children outside the presence of the parents only if the attorneys are present? is this true or false
December 10, 2013

Geometry
Quadrilateral RUBY is a rectangle. Which of the following statements MUST be true? Check all that apply: [] All four of the sides of RUBY are equal. []All four of the angles of RUBY are equal. []RUBY has two pairs of parallel opposite sides.
December 9, 2013

Calculus
Gerber Banana Plum Granola costs \$0.89 per 5.5-oz serving; each serving contains 140 calories, 31 g of carbohydrates, and 0% of the recommended daily allowance of vitamin C. Gerber Mixed Fruit Carrot Juice costs \$0.79 per 4-oz serving; each serving contains 60 calories, 13 g ...
December 2, 2013

Finance - Capital Budgeting/Cost-cutting
Caradoc Machine Shop is considering a four-year project to improve its production efficiency. Buying a new machine press for \$560,000 is estimated to result in \$210,000 in annual pre-tax cost savings. The press falls into Class 8 for CCA purposes (CCA rate of 20 percent per ...
December 1, 2013

Finance - Capital Budgeting/Bid Price
We have been requested by a large retailer to submit a bid for a new point-of-sale credit checking system. The system would be installed, by us, in 89 stores per year for three years. We would need to purchase \$1,300,000 worth of specialized equipment. This will be depreciated...
December 1, 2013

Accounting
Here is the income statement with all the numbers and accounts (This is a university in Canada by the way) i42. tinypic. com/ ws4i91. jpg (copy and paste without the spaces)
November 23, 2013

Accounting
I am doing a report on finding the major challenges in the future of my university with regards to their revenue and expenses. I have to discuss the main financial obstacles faced by the university and explain why each presents problems with future planning / budgeting. On the...
November 23, 2013

Calculus - Integrals
The projected rate of increase in enrollment at a new college is estimated by dE/dt = 6,000(t+1)^-3/2 where E(t) is the projected enrollment in t years. If the enrollment is 3,000 now (t=0), find the projected enrollment 15 years from now.
November 21, 2013

algebra
how do you find the x & y intercept of the equations y=-3 x=4 without graphing them?
November 18, 2013

Calculus - Optimization
A fence is to be built to enclose a rectangular area of 800 square feet. The fence along 3 sides is to be made of material \$4 per foot. The material for the fourth side costs \$12 per foot. Find the dimensions of the rectangle that will allow for the most economical fence to be...
November 17, 2013

Calculus - Optimization
A parcel delivery service a package only of the length plus girth (distance around) does not exceed 24 inches. A) Find the dimensions of a rectangular box with square ends that satisfies the delivery service's restriction and has a maximum volume. What is the maximum ...
November 16, 2013

Calculus
What would the derivative of c(x) = (10 - x) + 1.4*sqrt((x^2) + 25)
November 15, 2013

Math
Does an x and y intercept of 0 mean that there is no x or y intercept? Or is 0 an intercept?
November 11, 2013

Calculus
P(x) = 12x / (1-x) What are the critical points and where is P(x) increasing and decreasing?
November 10, 2013

Calculus
Find the critical points of f(x) = 0.05x + 25 + (180/x)
November 10, 2013

Grd 12 Math
Can someone please help me work out how to get to the answer of: tanx + tan (pi-x) + cot (pi/2+x) = tan (2pi-x)
November 6, 2013

Calculus
Given V(t) = 125,000e^(t/8) find V('t)
November 3, 2013

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