Sunday

October 4, 2015
Total # Posts: 290

**AP Chemistry **

Hey guys! Thanks in advance for help! Confused on a question: If the rate=k[NO]^2[Br2], and the concentration of Br2 is doubled, what happens to the rate? Maybe Answer: Maybe the rate would increase by a factor of two?
*October 1, 2015*

**Advanced Placement Chemistry**

I just wanted to say thanks for all your help! I'm still thinking about what to do for seven, but you make a good point. Your way makes more sense than mine did! Thanks again! You're amazing!
*September 24, 2015*

**Advanced Placement Chemistry**

For 7, this my thinking: Molality of solution: 5.63 g CdBr2 / 272.2 g/mol = 0.0207 mol / 0.1 kg water = 0.207 m 0.54C = i (1.86) (0.207) i = 1.4 If CdBr2 was completely dissociated, i would be 3. If it was a non-electrolyte, i would = 1. So I guess that's why I think it is...
*September 24, 2015*

**Advanced Placement Chemistry**

I'm so sorry! I didn't even think of that, but I will do that next time! I don't understand number 1, does BF3 have a zero dipole moment? Do the others look okay? Thanks so much!!!
*September 24, 2015*

**Advanced Placement Chemistry **

Hey guys! Stuck on some review problems: (My maybe answers are at the end) 1)Which of the following molecules has a nonzero dipole moment? A. CO2 B. H2 C. C12 D. CH4 E. BF3 F. None of the above has a nonzero dipole moment 2) Which of the following would you predict to have the...
*September 24, 2015*

**AP Chemistry **

Hey guys! I'm stuck on some study guide problems... (On the bottom of this, I put what answers make sense to me) A) A factor that affects the speed of heterogeneous reactions but not of homogeneous reactions is 1)nature of reactants 2)concentration of reactants 3)area of ...
*September 23, 2015*

**AP Chemistry **

Hey guys! What is the rate constant is particularly sensitive to: 1 A change in volume 2 A change in pressure 3 A change in product concentration 4 A change in reactant concentration 5 A change in the activation energy I feel like it is a change in the activation energy b/c ...
*September 20, 2015*

**AP Chemistry**

Hey guys! I'm really lost on this equation. Any help? H2(g) yIelds 2H(g) Delta H = 436 kJ/mol F2(g) yields 2F(g) DeltaH = 158 kJ/mol H(g) + F(g) yields HF(g) &...
*September 19, 2015*

**physics**

In the (Figure 1) the coefficient of static friction between mass mA and the table is 0.42, whereas the coefficient of kinetic friction is 0.17. Ignore masses of the cord and the (frictionless) pulley. What minimum value of mA will keep the system from starting to move? What ...
*September 10, 2015*

**Chemistry **

Hi guys! I just learned about significant figures today, and I have a question about them. My teacher gave us a problem where all values have what I think is four significant figures (like 44.56) except the value for temperature (which is 25.5C). Are temperature values ...
*September 9, 2015*

**Algebra**

Nope^^ you convert all the units to inches first!!!!
*September 9, 2015*

**Chemistry**

Okay thank you! :)
*August 14, 2015*

**Chemistry**

For the reaction ? Li+? N2 →? Li3N , what is the maximum amount of Li3N which could be formed from 11.79 g of Li and 17.08 g of N2? I got 19.72 g as my final answer and I just want to make sure I am correct. If I am not can you please help me understand this problem?
*August 14, 2015*

**Algebra**

For the following sequences determine the term indicated: a_1=-2, a_n=2(a_n-1)^2,a_4 a_n=ln(e^n+2), a_5 b_0=1, b_1=2, b_n+1=2b_n-b_0
*May 4, 2015*

**Chemistry**

How much heat is absorbed by a 2966 kg granite boulder as energy from the sun causes its temperature to change from 3°C to 31°C? 1000 g = 1 kg
*May 3, 2015*

**math**

a person had to drive 1417 miles. They drove 9 hours a day for 3 days. How many miles per hour did they drive?
*April 30, 2015*

**calculus trig substitution**

∫ x^3 √(x^2+9) dx If you work it can you write the steps? I really don't like the way my teacher teaches it. Someone else doing it might help.
*March 14, 2015*

**physics**

The tortoise and the hare agree to a race. Of course, they are racing cars, having gotten tired of racing on foot. The tortoise, having just bought a new Mercedes AMG GT, allows the hare to have a running start in his Volkswagen Rabbit. The hare starts the race by getting up ...
*February 15, 2015*

**physics**

A sprinter in a race can run 100m in 11.4 seconds. If it takes him 4.2 seconds to accelerate to top speed, what is the magnitude of his acceleration? Assume that he stays at his top speed from 4.2 seconds till the end. I do not understand which kinematics equation will help, ...
*February 15, 2015*

**math**

how do I translate this sentence into an equation. 51 is the product of Malik's height and 3 . Use the variable m to represent Malik's height
*February 13, 2015*

**algebra**

diana drove 320 miles, then increased her speed by 10 miles per hour for 500 miles. if the second part of the trip took 2 hours longer than the first, find her average speed.
*February 11, 2015*

**physics**

What potential difference is needed to stop an electron having an initial speed of 3.70x 105 m/s? Answer in volts
*January 29, 2015*

**physics**

The three charges in the figure are at the vertices of an isosceles triangle. Calculate the work that needs to be expanded, in Joules, to bring the charges together (as shown.) Take q=5.7 μC. The length of base is b=2.30 m. The lengths of sides are s=5.80 m. The two ...
*January 28, 2015*

**math**

Karen collects local and foreign coins. of the coins in her collection, 1/4 are foreign coins. Of the foreign coins,2/5 are from mexico What fraction of the collections are foreign coins that are not from mexico?
*January 12, 2015*

**alegbra 1**

so its letter d
*January 11, 2015*

**Algebra 1**

Where would the system below intersect on a graph? y=12x+15 y=15x I know that: x=5 y=75 But I need help on how to graph it.
*January 9, 2015*

**Physics 11**

A 1.00 x 10^4 W electric motor is used to lift a 955 kg object vertically 25.0 m at a constant velocity in 45.0 s. What is the efficiency of the motor? I did P=W/t (1.00x10^4 x 45 =W) And got 4.50 x 10^5 Then I did Ep' = Ek 955 x 9.81 x 25 = 234213.75 But I wasn't sure...
*January 4, 2015*

**English**

I have this question on my homework to find six pieces of figurative language and six pieces of symbolism for the book The Barcode Tattoo by Suzanne Weyn. I could only find two though- the barcode and the Whiteface Mountain. Please help. Your help is very much appreciated. -...
*December 10, 2014*

**chemistry**

Write out the mechanism (using correct curved arrow notation) for the acid-catalyzed, cis-trans isomerization of maleic acid (into fumaric acid) If teh electrophilic addition reaction of maleic acid with HCl had gone to completion what would be the structure of the addition ...
*December 3, 2014*

**Chemistry**

Assign the two absorptions found above 3000 cm-1 in acetamide. Why are these absorptions missing in n,n-dimethylacetamide
*October 8, 2014*

**Math**

how do i get 3 cups of flour if i only have 9 cups
*September 19, 2014*

**statistics**

In order to subject their cash registers to random audit, suppose we want to select a random sample of three people from this group of cashiers. Bonita, Chandra, Earl, Glenda, Homer, Jamal, Kendra, Maria, Oscar, Reshonda. How do I use a random number table?
*July 30, 2014*

**Biology**

A strand of DNA contains the following bases. ATT CCG GGA TTT a) what amino acids are coded for? First of all, would the mRNA strand be UAA GGC CCU AAA?
*May 18, 2014*

**science**

Sem and tem microscope
*May 7, 2014*

**Algebra I**

what does factoring the sum or difference of two cubes mean
*May 4, 2014*

**Calculus Help Please Urgent!!!**

Yeah.
*May 1, 2014*

**Pre algebra**

A bag of balloons contain 2 red balloons, 1 green balloon, 17 yellow balloons, and 8 orange balloons. What is the probability that a randomly selected balloon would be green or orange? I got 9/28, but I think that's wrong
*April 30, 2014*

**MATH UGH WORD PROBLEM**

3.14 (r squared)40 =
*April 1, 2014*

**Chemistry**

If 0.08 mol of LiCl is added to a one liter solution that has dissolved 0.01 mol of PbCl2, will a precipitate occur?
*March 4, 2014*

**algebra**

The rack of weight plated at the fitness center has a total of 148 plates weighing 2.5,5,and 10 pounds each. The total weight is 500 pounds. There are ten times as many 5 pound plates as 10 pound plates. Set up a matrix equations and then solve it to determine the number of ...
*December 16, 2013*

**physics**

in other terms of units, what is a joule equal to? a)N*m b)N/m c)W/s d)s/W e)N*s
*December 10, 2013*

**science**

I need an acrostic poem for the element Sodium?? puhleez?! THANX!!!
*December 7, 2013*

**Lit**

how does mark twain show racism and slavery in huckleberry fin? thanks!
*December 3, 2013*

**World History **

For my research project, I need to choose an absolute monarch. I want to do one on a monarch/emperor/king from Vietnam because I have Vietnamese origins and am interested in learning more about its history. Is there any well known Vietnamese absolute monarchs? Thank you
*November 19, 2013*

**Grade 12 Physics**

For this question my answer keeps on coming to 25m/s but answer is 28.
*November 18, 2013*

**Science**

Explain what acids and bases are in terms of hydrogen ions. Which has more hydrogen ions and which has less?
*October 29, 2013*

**physics**

the moon has a period of 27.3 days and a mean distance of 3.90x10^8 m from the center of the earth. find the period of a satellite in orbit 6.7x10^6 m from the center of earth. thank you!
*October 26, 2013*

**religion/theology**

i have to make a prayer video and i dont know what to make it about, please help! thank you
*October 12, 2013*

**CHEMISTRY**

Given that Mg(ClO3)2 decomposes into magnesium chloride and oxygen: A) Write a balanced equation for this reaction. I got Mg(ClO3)2 yields MgCl2 + 3 O2 Is that right? B) If 0.302 grams of O2 is lost from 1.890 grams of a mixture of Mg(ClO3)2 and an inert material, what is the ...
*September 30, 2013*

**CHEMISTRY**

Given that Mg(ClO3)2 decomposes into magnesium chloride and oxygen: A) Write a balanced equation for this reaction. I got Mg(ClO3)2 yields MgCl2 + 3 O2 Is that right? B) If 0.302 grams of O2 is lost from 1.890 grams of a mixture of Mg(ClO3)2 and an inert material, what is the ...
*September 30, 2013*

**Lit**

in the scarlet letter what influence did the witches have on pearl thanks!
*September 10, 2013*

**lit**

yea i had to read the book over the summer but my teacher wants us to find a celebrity that kinda represents them. like how lindsey lohan is like a pearl
*September 9, 2013*

**lit**

im doing a character analysis and i need help on what celebrity is like hester and one like pearl
*September 9, 2013*

**Writing**

Can you proofread my essay? Life in the Fast Lane Have you ever changed so much in life that you couldn’t possibly bare it? Well, that person is called a dynamic character, someone who changes throughout a drama. In the drama, “The Crucible,” by Arthur Miller ...
*September 7, 2013*

**history**

why is the columbian exchange and pilgrims important to the U.S history? thank you!
*September 4, 2013*

**theology**

WHO IS saint. cecilia?
*August 31, 2013*

**Lit**

thank you so much!!
*August 25, 2013*

**algebra**

It's a difference of two squares. It'll be (x+sqrt(4)) and (x-(sqrt(4)), for example---replacing 4 with whatever number is being subtracted from x squared. That one is (x-2)(x+2). Another example: x^2-16 = (x-4)(x+4) You can even do this: x^4-16 = (x^2-4)(x^2+4)
*August 25, 2013*

**Writing**

Can you proofread my essay and I also need a good title? Christopher Columbus was a brave, strong, hard-worker who took sea to America in 1470. What is biased? Biased is your opinion or idea on someone. In Christopher Columbus journal excerpt, there were many examples of how ...
*August 24, 2013*

**math**

In a class of 80 seniors, there are 3 boys for every 5 girls. In the junior class, there are 3 boys for every 2 girls. If the two classes combined have an equal number of boys and girls, how many students are in the junior class?
*July 9, 2013*

**theology**

there are no variations within the catholic liturgy. all liturgy is identical worldwide. true or false?
*May 27, 2013*

**math**

Part 1: Write two conditional statements for which the converse is true. 1. Statement: 2. Converse: 3. Statement: 4. Converse: Part 2: Write two conditional statements for which the converse is false. 5. Statement: 6. Converse: 7. Statement: 8. Converse:
*May 12, 2013*

**math**

simplify sin(540-2x) this is to do with trig
*May 10, 2013*

**Trig**

Verify the identity. (secx + tanx)/(secx - tanx) = (1 + 2sinx + sin(^2)x)/cos(^2)x
*May 9, 2013*

**maths**

find the general solution for the equation: sin2x+ square root 3cosx =0
*May 9, 2013*

**english**

a dolls house questions: what religious themes do you see in the play? What is the significance of Nora’s words, “to hell and be damned” in Act I? Was Nora wrong to have acquired the money for the trip to save Torvald’s health? What elements of Nora and ...
*May 5, 2013*

**Algebra**

The stem-and-leaf plot represents the average monthly high temperatures in Tampa, Florida. What is the first quartile (Q1) of the temperatures? Round to the nearest tenth. Stem leaf 6 9 7 1267 8 14799 9 00
*May 2, 2013*

**Math**

Does this set of data have any outliers? Data: 1, 2, 2, 4, 6, 6, 7, 8, 9, 10, 12, 13, 16, 16, 18. no or yes
*May 2, 2013*

**Algebra**

The data below represents the average score per game of the top 40 NBA players, rounded to the nearest whole number. Find the minimum, Q1, median, Q3, maximum for the data. Stem l leaf 1 l 55667777888888899 2 l 00000011123445566679 3 l 135
*May 2, 2013*

**AP Chemistry**

yea you're right!
*April 30, 2013*

**english**

Just took this test and got 100% the answers are, rhetorical criticism and structure
*March 30, 2013*

**College Statistics**

A random variable X has a Gamma distribution with (alpha = a, beta = b). Show that P(X > 2ab) < (2/e)^a. hint: X > c is equivalent to e^Xt > e^ct
*March 30, 2013*

**Chemistry**

How many liters of hydrogen gas can be produced at 300.0K and 1.55atm if 20.0g of sodium metal is reacted with water?
*December 6, 2012*

**Chemistry**

How many liters of hydrogen gas can be produced at 300.0K and 1.55atm if 20.0g of sodium metal is reacted with water?
*December 6, 2012*

**science**

I just wish that people could post a helpful answer, Translational motion is movement of an object without a change in its orientation relative to a fixed point, as opposed to rotational motion, in which the object is turning about an axis. With that in mind a leaf blowing ...
*November 29, 2012*

**math**

Is a package of 8 hot dog buns proportional to a package of 10 hot dog franks?
*October 28, 2012*

**Physics**

A ball of moist clay falls 10.4 m to the ground. It is in contact with the ground for 20.5 ms before stopping. (a) What is the average acceleration of the clay during the time it is in contact with the ground? (Treat the ball as a particle.) m/s2 (b) Is the average ...
*October 21, 2012*

**math 7th grade**

hint: use pemdas
*October 18, 2012*

**math 7th grade**

what is 234(2-1+1092-924+18) ?
*October 18, 2012*

**physics**

A 16000 kg sailboat experiences an eastward force of 12400 N due to tide pushing its hull while the wind pushes the sails with a force of 51900 N directed toward the northwest (45 westward of North or 45 northward ofWest). What is the magnitude of the resultant ac- ...
*October 17, 2012*

**3rd grade**

the answer is precisley 9 hands:)
*October 16, 2012*

**Math**

An invoice of $12,000 is dated April 5. The terms 5/10,n/30 are offered. Find the amount due if the discount is earned. Show your work.
*October 12, 2012*

**chemistry**

If i have .0030M BaSO4 how do I calculate the moles of sulfate?
*October 10, 2012*

**physics**

a plane needs to fly at 40 degrees n of e when flying through a wind that blows 80 mph @ 70 degrees S of E. If the plane goes 320 mph in still air in what direction should the plane aim?
*September 27, 2012*

**Physics**

A stone is dropped from the top of a well. If the well is 23.1 meters deep, how long with the stone take to reach the bottom?
*September 16, 2012*

**Physics**

An object with a mass of 3kg is dropped from 56.3 meters. How far above the ground is it's kinetic energy 1073J?
*September 16, 2012*

**physics**

A metal sphere of radius 5.00 cm is initially uncharged. How many electrons would have to be placed on the sphere to produce an electric field of magnitude 1.59 105 N/C at a point 7.98 cm from the center of the sphere?
*September 12, 2012*

**AP Chem**

how many milliliters of 0.10 M HCl must be added to 50.0 mL of 0.40 HCl to give a final solution that has a molarity of 0.25 M?
*August 21, 2012*

**Math**

4% x 60month x 2000= 4800 I am really struggling with this problem.
*May 29, 2012*

**Math**

What would the rate of return be on an Individual Retirement Account with a contribution of $2000.00, at 4% Interest rate, for 5 years?
*May 29, 2012*

**math algebra **

what are 4 consecutive integers whos sum is -2
*May 21, 2012*

**English (Mrs,Sue!!)**

Mrs.Sue, I wrote a paper on research proposal. Now, my teacher is asking us to write the steps on how we wrtoe the paper. Can you reword these questions for me? thank you so much!! "What techniques did you use as you thought through the issue? " "What prewriting...
*May 3, 2012*

**Ms.Susy Please Help With Time!!!!!!**

the answer is 5:30 hours
*April 23, 2012*

**physics**

+y| / F | / | / | / /a_ _ _ _ _ +x 40N This is pretty much what the picture looks like. Your answer was incorrect!
*April 20, 2012*

**physics**

"Only two forces act on an object (mass = 3.90 kg), as in the drawing. (F = 76.0 N.) Find the magnitude and direction (relative to the x axis) of the acceleration of the object. " (The angle is 45 degrees and the horizontal force is 40N)
*April 20, 2012*

**physics**

"Only two forces act on an object (mass = 3.90 kg), as in the drawing. (F = 76.0 N.) Find the magnitude and direction (relative to the x axis) of the acceleration of the object. " (The angle is 45 degrees and the horizontal force is 40N)
*April 20, 2012*

**Math**

Is my answer correct then??
*April 12, 2012*

**Math**

Thank you!!
*March 15, 2012*

**Math**

R varies jointly as S and the square of T. If R is 32.4 when S=0.2 and T=9, find R when S=0.5 and T=5. I believe the answer is R=25, could someone check this for me?
*March 15, 2012*

**Math**

for his new room Daren will need 154 feet sq of wall to wall to cover of his new square room. what is the length of each wall of his room?
*March 13, 2012*