Posts by tia

Total # Posts: 416

Chemistry
If the pOH of a solution is determined to be 5, what is the pH of the solution?

Chemistry
A solution is prepared by adding of KOH to 1 liter of water. The resulting solution has an [OH negative]of 1 * 10 negative 3. What would be the pOH of this solution? Can you show me how you came up with this answer? Thank you.

Chemistry
Can you show me the calculation? How many ml of a 2 M solution of HCL would be needed to neutralize 2 ml of a 5 M solution of KOH?

Chemistry
how many grams of CaCl2 would be required to be added to water to prepare 1 liter (1000 ml) of a 1.72% (w/v) aqueous solution of CaCl2?

biology
Explain negative feedback and give one example in the human body.

english
Snowy

MATH
WHAT IS THE ANSWER FOR 3 SIXES IN SIMLET FORM

Chem
molarity of 36% HCl=11.667

Chem
11.667

WHAT IS THE ANSWER FOR 3 SIXES SIMPLETS FORM

Pre Algebra
two sums of money totaling 15000 earn 5% and 7% annual interest. if the total interest from both investments amounts to \$870, how much is invested at each rate?

BioChemistry
Write the oxidation equation for sec-butyl alcohol. How do I do this?

BioChemistry
Write the oxidation equation for sec-butyl alcohol. How do I do this?

physics
An athlete executing a long jump leaves the ground at a 30.3 angle and travels 7.68 . What is the take off speed? If this speed were increased by just 3.0%, how much longer would the jump be?

geometry
is it a hexagon?

geometry
what is the name of the figure that is 36 inches around and that has equal sides, each 6 inches long?

science
a car traveling 20m/s brakes and takes 3s to stop. what is the acceleration in m/s2?

uc
As an experiment she randomly selected 15 students and randomly assigned them to one of three groups which include either a PowerPoint presentation created by the faculty, AuthorGen Presentation created by the faculty, or a well known tutorial by the ABC company. After ...

math
what were the headlines after a mad scientist trained two eggs to attack a candy store with sharp sticks

Chemistry
the formula H2O2 is an example of 1.molecular formula 2. an empirical formula 3.an ionic formula 4.an organic formula

Math
Hi Sorry I'm reposting this question, I think the answer that was provided was not correct because of the ambiguity of the original question but if I could have someone workout the question as written it would be much appreciated: See below discussion. 4x^3y^-2 / 2x^-1y^4 ...

Math
The way I wrote it is exactly how the book has it. It's all written together without brackets. Very ambiguous I agree but I'm now not sure if the answer you provided is correct.

Math
4x^3y^-2 / 2x^-1y^4 is the answer: 2x^4y^-6 ?

math
at first I got A l tn o wh a but after I went back I relized I missed a few so the answer is a low ha

maths
paul is paid \$5 per hour. one day paul works for 4 hours 15 minutes. calculate his total pay.

maths
a boat travel 5 miles due south and then 11 miles due east. how far is it from the starting point?

maths
juan had \$3000 in his savings account. a year later, he had \$4000 because interest accured on his savings. find the percent increase.

maths
a ramp 10ft long is connected to the back of a truck that is 4ft off the ground. how far away from the truck does the ramp touch the ground?

math
the diagram shows a square xyrz of side 15m with an inscribed circle centre o.calculate the area of the square, circle and the shaded region

maths
for he formula A=P+Prt, find the value of (a). (i) A when P = 750. r=0.09 and t=8 (ii) P when A=720.r=0.12 and t=5 (b) make t the subject of the formula

maths
two cyclists go around a race track repeatedly. the first cyclist takes 105 seconds to complete a circuit. the other cyclist takes 75 seconds. they begin together at the starting line. calculate the length of time, in minutes and seconds that would have elapsed before they are...

math
the diagram below represents a drinking glass of diameter 10cm. it is partially filled to a height of hcm with apple juice. (a) using 3.14 give an expression in term of h for the volume of juice. the actual volume of the juice is 0.471 litres. (b) calculate the value of h.( 1 ...

maths
solve the following pair of simultaneous equations. 2x-3y=13 3x+y=3

maths
karen decorated her mother's birthday cake. one-third of candles are pink, three-eights are yellow, one-quater are blue and the two remaining candles are white. calculate (a). the fraction of candles that are white. (b). the total number of candles on the cake.

MATH
WRITE DOWN THE VALUE OF (4XY)

math
these two rectangles are the similar, rectangle number one: the width is 42cm and the height is 27cm. rectangle two: the width is 56cm find x.

math
expand x^(4-2x)

math
write down the value of 27 1/3

Physics
A 25 kg mass is on a level, rough surface where the force of friction is a constant 15 N. A horizontal applied force of 65 N acts on the mass. The mass is initially at rest. What speed does that mass have after being moved 2.0m?

math
a car uses 25 litres of petrol to travel 200 miles. how many litres of petrol will the car use to travel 450 miles?

math
mr jones buys a new car for \$50,000. the car decreases in value at the rate of 30% each year. find the value of the car after two years.

math
expand and simplify 4(3k-2)+3(4-k)

math
write down the value of (4xy) degress

maths
a car uses 25 litres of petrol to travel 200 miles. how many litres of petrol will the car use to travel 450 miles?

geometry
AB is 9cm and AC is 19cm calculate the lenght of BC if the angle is a 90 degress

acconting
the dept of a business are considered

accounting
can i get answers for pen foster exams#500843

calculus
Find dy/dx 4x^2+y^2-8x+4y+4=0, find points on graph of the equation where there is a vertical or horizontal tangent line

physics
I need help to work a problem like this

Trigonometry
A space shuttle pilot flying over the suez canal finds that the angle of depression to one end of the canal is 38.25 degrees and the angle of depression to the other end is 52.75 degrees. If the canal is 100.6 miles long, find the altitude of the space shuttle

what is the best estimate of 89+12 a 90 b. 100 c. 80 d. none of these

english
how to do a work cited page for a consumerisum project for a milkshakes

Physics
you push with a 40-N horizontal force on a 2-kg box of coffee resting on a horizontal surface. The force of friction on the box is 12 N. Show that the acceleration is 4 m/s^2

12x+3x=15x 12+3=15 x+x=x =15x

Math ( Algebra 1 )
Two rectangles have the same width. The length of one is 2 feet longer than the width. The length of the other is 4 feet longer than the width. The larger rectangle has 8 more square feet than the smaller. What is the width of the rectangles?

physics
Suppose you drop a ball into the ocean in a place where there is no current.Will waves move the ball away,or will it bob in place?

math
4x^3y-20x^2y+16y

if you take apart 5x5x5 cube and build a pyramid with the same cubes, with each layer of the pyramid being a square and the top ending as a 1x1x1. How many tiers can you make?

HCA 210
how would you ensure the mentally ill are placed into the appropriate care facility

Precalculus
Describe the important features of exponential decay.

chemistry
how many valence electrons is an oxygen atom able to attract from other atoms

algebra
I rent out 2/5 of my books, give 3 away, buy 9 and now have 27. How many did I start with - I know it's 35 but I can't make the formula work

GPA
I am confused on how weighted courses work. At my school, a two semester course is weighted (1.2) and a semester course is weighted (.6) How do these numbers help your gpa?

social studies
If there is collision between the president and Congress, can Congress restrain the president in foreign policy making?

1. A farmer had several pens out by the barn. He had used 17 lenghts of fence to make the pens, but now he needs to use six of those fence lengths for another project. He wants to remove six fence lenghts but still have two square pens remaing. Which lenghts should he remove? ...

Science
What are some of the problems when designing a new single cell

Enchancing Children's Self-Esteem
Are these answes correct

History
Why did parents pressure local governments to reform public schools?

math
7 80

math
7

math
i don't know

math
the average american use about 80gallons of watereach day how many people are in your family use this number to figure out about how many gallons of water uses each day

MATH
ONE CHILD IN THE U.S. THROWS OUT ABOUT 180 DISPOSABLE CONTAINERS EACH SCHOOL YEAR HOW MANY CONTAINERS WILL HE OR SHE THROW OUT IN 2 YEARS 5 YEARS

MATH
ONE CHILD IN THE U.S. THROWS OUT ABOUT 180 DISPOSABLE CONTAINERS EACH SCHOOL YEAR HOW MANY CONTAINERS WILL HE OR SHE THROW OUT IN 2 YEARS

IN THE UNITED STATES EACH PERSON CREATES ABOUT 4 POUNDS OF WASTE EVERYDAY HOW MANY POUNDS OF WASTE WILL PEOPLE MAKE IN 5 WEEKS

social studies
what are some different ideas scientists have about where the first Americans came from?

Math
Find the y- and x-intercepts for the equation. I have an idea of how to do this but want to make sure I am going in the right direction! Thanks! 4y = -28 + 7x

Math
Please simplify. Write your answer using positive exponents. (8^2)^ -1 =? In case you are having trouble reading it, it translates to: (8 squared) to the -1 power (exponent) or (8 ^2) ^ -1 = ? Any ideas? I have an idea, but would appreicate some feed back! Thanks!

Math
Find the slope of the line that goes through the given points. I think my answer is correct but would appreciate some feedback so that I may compare! Thanks in advance! (3,-2),(-1,-6)

Algebra
Find the slope of the line that goes through the given points. I think my answer is correct but would appreciate some feedback so that I may compare! Thanks in advance! (3,-2),(-1,-6)

Algebra
I need 3 ordered pairs of points that would be solutions to this equation. Can anyone help please, thanks! 4x - y = 7

Algebra
Hi! Does 4 over the square root of 12 reduce to 4 over 2 times the square root of three?

205
2.c 3.c 4.c 6.c 7.c 8.c 10.c 11.b

calculus
Could somebody please check these for me? Solve the differential equation with the given initial solution. 1. (dy/dx)=(-y/3) for y(0)=10 my answer was y=10e^(-x/3) 2. dP/dt=P+4 for P(0)=100 my answer was P=104(e^t)-4 3. dz/dt=te^z for z(0)=0 my answer was z=-ln(-.5(t^2)+1) THANKS

calculus
Could somebody please check these for me? Solve the differential equation with the given initial solution. 1. (dy/dx)=(-y/3) for y(0)=10 my answer was y=10e^(-x/3) 2. dP/dt=P+4 for P(0)=100 my answer was P=104(e^t)-4 3. dz/dt=te^z for z(0)=0 my answer was z=-ln(-.5(t^2)+1) THANKS

chemistry
correction: the base is NaOH and acid is HC2H3O2

chemistry
What is the pH of the solution created by combining 12.00 mL of the 0.10 M base with 8.00 mL of the 0.10 M acid base acid NaOH HC2H3O2

chemistry
I'm supposed to find the pH of .1M HC2H3O2. since this is a weak acid, i used the ICE method with the given 1.8x10^-5 ka. and i got a pH of 4.4, but it was wrong....

Chemistry
what is the pH of a 0.10 M NH3???

Chemistry
When a good indicator has been chosen, the pH at which the solution changes color is very close to the equivalience point of the titration. If this "point" for a particular titration occurs at pH x, a good indicator for the titration would be indicator. X indicator 0...

calculus
how would you find the median of a pdf picture it basically is a triangle with points (0,0) (6,.2) (10,0) I found the centroid, or where all the lines from the vertex to the middle of each side intersect and found the intersection of all three lines to be (5.33,.667) would ...

calculus
hi I posted this question earlier: what is the median waiting time for f(x)=((1/8)e^(-x/8))? I said the answer was 5.55 is this correct? thank you! and somebody helped me find the mean, but i was wondering if this was the right median. thanks

calculus
how would you find the median of a pdf picture it basically is a triangle with points (0,0) (6,.2) (10,0) do i need to find the slopes to find equations for the lines? thanks!

calculus
what is the median waiting time for f(x)=((1/8)e^(-x/8))? I said the answer was 5.55 is this correct? thank you!

calculus
could some body please check this for me? 1. find the exact coordinates of the centroid of the region bounded by y-x^2, the x axis, the y axis, and the line x=1? I said the answer was ((3/4), (3/10)) 2. Find the exact coordinates of the centroid of the region to the right of ...

math riddle ALGEBRA WITH PIZZAZZ
What happened when two fruit companies merged?

PHysics-almost complete!
ok, i thought i had an answer, but it wasn't correct...here was my work... (.615)(390)(T-373.15)=(.244)(418.6)(T-293.15)=0 T=349.2571663 -> C=76.1071663 When I used that T in the equation it worked... =(

PHysics-almost complete!
In a physics lab experiment, a student immersed 205 one-cent coins (each having a mass of 3.00 g *.003kg) in boiling water. After they reached thermal equilibrium, she quickly fished them out and dropped them into 0.244 kg of water at 20.0 C in an insulated container of ...

Physics, almost have it!
In a physics lab experiment, a student immersed 205 one-cent coins (each having a mass of 3.00 g *.003kg) in boiling water. After they reached thermal equilibrium, she quickly fished them out and dropped them into 0.244 kg of water at 20.0 C in an insulated container of ...

In a physics lab experiment, a student immersed 205 one-cent coins (each having a mass of 3.00 g *.003kg) in boiling water. After they reached thermal equilibrium, she quickly fished them out and dropped them into 0.244 kg of water at 20.0 C in an insulated container of ...

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