maura

There are 27 pigs. The farmer needs to get them into four pens. But all the pens have to have an odd number of pigs. Zero doesn't count as a number.

18 years ago

how many different types of walnut trees are there and what do they look like?

18 years ago

whats x+2+2x=x+10?

17 years ago

Ammonium bisulfide, NH2HS, forms ammonia NH3, and hydrogen sulfide, H2S through the reaction: NH4HS (s) <--> NH3(g) + H2S(g) Kp value of .120 at 25C in a 5L flask is charged with .300g of H2S at 25C. A) What are the partial pressures of NH3 and H2S at equ...

13 years ago

Kp=1.6 Kp=1.0*10^-4 A<->2B Find the equilibrium partial pressures of A and B B=1.0 atm A=0.0 atm This is what I have so far A 2B 0 1.0 +p -p p 1-p [B]^2/A (1-p)^2/p = 1.6 then got a quadratic equation of p^2+1.6p-1 to get x=.48

13 years ago

Hi, so I did a lab on acids, bases, salts and buffer solutions. After measuring the pH for a .010 M HCl solution I got a pH of 2.50. After doing a calculated pH of .010 M of HCl the answers is 2. My question is why do you think my pH from the experimental...

13 years ago

I keep getting wrong answers for this question. Determine the pH of an HF solution of each of the following concentrations. a) .280 M b) 5.3*10^-2 M c) 2.50*10^-2 M No Ka has been given. I haven't attempted b or c yet because I want to at least solve a fi...

13 years ago

pH of HF 5.3*10^-2 M Since HF is a weak acid, I'm not sure which formula to use.

13 years ago

I am giving a titration curve of a weak base and strong acid. The pH on the y scale is from 0-14 and the volume of titrant in mL is from 0-34. It looks like the equivalene point is around 22? The question is: "The above titration curve was obtained when a...

13 years ago

Suppose x=4sin(theta, for theta (-pie/2, pie/2). Rewrite(sqrt16-x^2)^3/x^3 (Sorry Im not very good at making symbols. I hope you know what I mean here! if not I can try to rewrite it a different way)

13 years ago

find the limit. lim (5-e^x)/(5+3e^x) (x-> infinity) how would i go about solving this? thank you in advance to anyone who can help me.

13 years ago

This problem has two parts but I can only see this so far. I probably over thinking..what is this asking for? How do I answer it? To evaluate lim x→ infinity sqrt(x^2 + 4) *first consider that as x becomes infinitely large x^2+4 -> __?__

13 years ago

To find the equation of a line, we need the slope of the line and a point on the line. Since we are requested to find the equation of the tangent line at the point (64, 8), we know that (64, 8) is a point on the line. So we just need to find its slope. Th...

13 years ago

An object is dropped from a height H above the ground. This free-falling object requires 0.904 s to travel the last 34 m before hitting the ground. From what height H above the ground did the object fall? The acceleration of gravity is 9.8 m/s^2. Answer i...

13 years ago

Differentiate the function. g(x)= x^2(1-2x) g'(x)= i tried doing 2x(1-2x) 2x-4x^2

13 years ago

Differentiate the function. y = (Square root x)(x − 10)

13 years ago

Three particles of masses 14 kg, 21 kg, and 69 kg are located at the vertices of an equilateral triangle of sides 7 m. A)Find the x-coordinate of the center of gravity of this system with respect to a coordinate system with origin at the 14 kg particle an...

12 years ago

Question 4 A 0.9 kg block attached to a spring of force constant 2.1 N/m oscillates with an amplitude of 9 cm. A)Find the maximum speed of the block. Answer in units of m/s B)Find the speed of the block when it is 4.5 cm from the equilibrium position. Ans...

12 years ago

A bat moving at 6.5 m/s is chasing a flying insect. The bat emits a 37 kHz chirp and receives back an echo at 37.65 kHz. At what speed is the bat gaining on its prey? Take the speed of sound in air to be 336 m/s. Answer in units of m/s

12 years ago

draw all possible z isomers for an alkene with the formula C4H7Br. im having some difficulty, please help

12 years ago

Find maxima and minima and points of inflection. f(x) = 2x^3 - 3x^2 -36x +100 on the interval [-6,4]

11 years ago

Need quick help with this question. Is electric force directly proportional to 1/r or 1/r^2?

11 years ago

Thank you for answering me! You don't know how much it means to me. I think I'm over thinking this but I need all the help I can get. So for A) I just divided .120/.0431 and got 2.78. It just seems too simple to me haha. For letter C I tried finding the m...

13 years ago

Not sure what I did there? my x value came to be .3035. Should I plug this number into the (1-p)^2/p

13 years ago

if that is correct then i got a value of 1.6 after plugging it in. This is the step that Im not sure what to do.

13 years ago

I got the same answers for both, but I don't know how to get two pressures from these numbers

13 years ago

Thank you for your feed back it helped me out greatly!

13 years ago

Oh okay I thought you used Ka to solve these. That's what I'm doing wrong. I tried looking up the Ka for HF and multiplying it to .280 then take the -log of that number. The reason why I had to different numbers is because I found two different Ka's. If I...

13 years ago

to find pH

13 years ago

There is no Ka value that I see, so I looked it up hopefully on a reliable website. Could you make sure this is correct? 7.2*10^-4 so would this problem be: 7.4*10^-4= (x^2)/ (5.3*10^-2-x) On a calculator I get this number 0.006262587 then -log to get 2.2...

13 years ago

Yes I meant 22mL. How would I go about solving for the Kb?

13 years ago

im pretty sure my first step would be to divide the numerator and denominator by e^x but i don't know where to go after that.

13 years ago

oh okay i understand now! thank you so much for helping me. i really do appreciate it!

13 years ago

would this just be infinity that they are looking for?

13 years ago

if youre factoring this then the way you factor the quadratic equation looks like this: (3x^2+5x-2)=0 (3x-1)(x+2)=0 *notice how the the FOIL method works here. then to get x you would take each one and set it to 0. making this x=(1/3) and x=-2

13 years ago

the program is telling me that is incorrect

13 years ago

its asking for f(x) and a im just trying to figure out how i would go about doing this. thanks for answering me.

13 years ago

i got a slope of 1/16 is that right?

13 years ago

well the question is from what im assuming is trying to find what f(x) is equal to. that's the last line of my question above. it also wants me to find what a is equal to. so to find slope i took the first derivative: y'= 1/ [2sqrt(x)] since x=64 makes th...

13 years ago

this sentence doesnt look quite right it should look more like this In this situation, the function is f(x) = ? a= ?

13 years ago

please someone help!!

13 years ago

never mind I got it but could someone just help me with this one. A(s)= -11/s^6

13 years ago

Thank you!!

13 years ago

it tells me that its incorrect

12 years ago

I was looking at coulombs law and I thought it was inversely proportional but my options are only 1/r or 1/r^2 and the question states directly proportional. I don't see how either answer could be correct. I could see how q1q2 is directly but not with the...

11 years ago