Friday

September 30, 2016
Total # Posts: 2,323

**Chemistry**

So I've done as you said and have come up with the following: C (g) = 0.0437g H (g) = 0.00583g O (g) = 0.01167g C(mol)=0.00364mol H(mol)=0.00578mol O(mol)=0.000729 I then divide for the ratio (Mm=m/n) and get 12 for C, 1 for H, and 16 for O, making the formula: C12HO16, ...

*September 22, 2016*

**Chemistry**

Sorry, it's 0.06120 g produced 0.1601 g of CO2 and 0.05243 g of H2O

*September 22, 2016*

**Chemistry**

Hey, can someone help me with this? A compound containing only C, H and O was subjected to combustion analysis. A sample of 6.120Ã—10^-2 g produced 1.601Ã—10^-1 g of CO2 and 5.243Ã—10^-2 g of H2O. Determine the empirical formula of the ...

*September 22, 2016*

**Precalculus**

Thank you so much!!! I see what I was doing wrong now. PS: You have good handwriting :)

*September 19, 2016*

**Precalculus**

Yeah, I tried drawing a diagram, but I just keep getting confused.

*September 19, 2016*

**Precalculus**

In triangle ABC, we have AB=3 and AC=4. Side BC and the median from A to BC have the same length. What is BC? Please help, I have no idea where to start.

*September 19, 2016*

**math**

a man sleeps 8 hours a day. how many hours can he sleep in a year?

*September 19, 2016*

**math**

Sara is thinking of a number when she rounds her number to the nearest hundred,she gets 700.What is the greatest number Sara can be thinking of?Explain

*September 13, 2016*

**Please check my answer(Social Studies)**

So what's the answers

*September 13, 2016*

**Physics**

A drag racer starts her car from rest and accelerates at 4.8 m/s 2 for the entire distance of 409 m. How long did it take the car to travel this distance?

*September 13, 2016*

**Science**

Which of the following means using specific observations to make generalizations? A: BIAS B: Subjective C: Deductive Reasoning D: Inductive resoning is the answer c?

*September 12, 2016*

**home economics**

what are the branches of fibre

*September 11, 2016*

**Physics**

A block of mass m1= 3.70kg rests on a 30degree incline and is held stationary by a mass of 1.3kg hanging vertically over a frictionaless pulley at the top. Calculate the value of u (coefficent of friction)

*September 8, 2016*

**Physics**

56.7 m

*September 7, 2016*

**Math**

How do you write 4,000,000,000 + 20,000,000 + 500,000 + 60,000 + 1,000 + 300 + 40

*August 30, 2016*

**Chemistry**

24.332

*August 28, 2016*

**math**

6 people like soccer, 3 like volleyball, 7 likefootball, and 2 likebasket ball show that in tallies

*August 23, 2016*

**Economics**

Consider a single price monopoly that faces a market demand curve for a good is given by the equation 𝑃=100−.1𝑄 and the total cost function is given as 𝑇𝐶=1000+20𝑄+.4𝑄2. a. What is the total fixed cost for this monopoly? P=...

*August 23, 2016*

**science**

The boy A weighs 50 kg and the girl B weighs 35 kg in a seesaw...the board of the seesaw is 3.6 meter... To balance the seesaw where should girl C who weighs 25 kg seat or what particular distance should girl C seat to balance it

*August 18, 2016*

**Calc**

Find the value of m such that y=mx divides the area under the curve y=(1-x)x in [0,1] into two regions of equal area D: D: D:

*August 17, 2016*

**Math**

Solve the equation: (1) 5/2 = 3x; x= (2) 7/2 = 4x; x=

*August 15, 2016*

**Math**

Solve the equation: (1) 5= 6y; y (2) 7/2 = 4x; x

*August 15, 2016*

**Math **

Solve the equation: 9/5 = 1 + m; m

*August 15, 2016*

**Math**

Solve the equation 1) 4= 5y; y = 2) 7/4 = 1 + m; m= 3) 7= 6y; y

*August 15, 2016*

**Maths**

Prove that sin2x+cos2x-1/sin2x+cos2x+1=tanx

*August 9, 2016*

**Math **

A fossilized leaf contains 21% of its normal amount of carbon 14. How old is the fossil (to the nearest year)? Use 5600 years as the half-life of carbon 14.

*August 3, 2016*

**Science (Biology)**

krfkrfrf

*July 30, 2016*

**Math**

A car is traveling at a rate of 35 meters per second. What is the car's rate in kilometers per hour? How many kilometers will the car travel in 3 hours? Do not round your answers.

*July 29, 2016*

**Math**

solve these questions using distributive property 30% Of 10= 30% of 20= 30% of 30=

*July 23, 2016*

**Calc **

a large closed storage rectangular box with a base constructed with two different types of wood. the base is made up of wood $5 per square feet and the top and sides are made of wood $3 per square feet suppose the amount available to spend is $1000 find the dimensions of the ...

*July 20, 2016*

**math**

The angles of elevation of a balloon directly above a straight road, from two points of the ground on opposite sides of the balloon, are 78¡ã15' and 59¡ã47'. If the points are 5000ft apart, what is the height of the balloon?

*July 20, 2016*

**ENGLISH**

A creative writing teacher tells students to publish their writing projects in a nonprint format. Which of the following techniques would not meet the teacher’s requirements?

*July 13, 2016*

**Chemistry**

14 grams of coal undergoes complete combustion in 58 grams of oxygen gas. What volume of gas (measured at 25 degrees celsius and 100 kPa) is present when the reaction is complete?

*July 11, 2016*

**Calculus**

Launching a missile to hit a target 100 miles away. Determine the launch speed of the missile along with the angle at which it's to be fired. Also, show your work and one of the angle that will work. Finally, assume that the only force acting on the missile is gravity.

*July 7, 2016*

**Maths**

The sum of the interior angles o a regular polygon is 30 right angles. How many sides have the polygon?

*July 7, 2016*

**University of Liberia Chemistry 102**

Using a current of 4.75A how many minutes does it takes to plate onto a sculpture 1.50g of CuSO4 solution?

*June 29, 2016*

**Math**

If the 16th term of an arithmetic sequence is three times the fourth term, find the ratio of the 23rd term to the third term.

*June 27, 2016*

**physics**

7.500N

*June 18, 2016*

**physics**

calculate the net force required to give a 3000kg trucks an acceleration of 2.5m/s^2

*June 18, 2016*

**Calculus- PLEASE HELP**

A rectangular piece of tin has an area of 1334 square inches. A square tab of 3 inches is cut from each corner, and the ends and sides are turned up to make an open box. If the volume of the box is 2760 cubic inches, what were the original dimensions of the rectangular piece ...

*June 14, 2016*

**Calculus**

A rectangular piece of tin has an area of 1334 square inches. A square tab of 3 inches is cut from each corner, and the ends and sides are turned up to make an open box. If the volume of the box is 2760 cubic inches, what were the original dimensions of the rectangular piece ...

*June 13, 2016*

**Calculus- Reiny **

Thanks for the help, but do you understand what Im suppoosed to graph on 2D d) Use a graphing calculator to sketch the graph of y = V(x). Use the viewing window [0, 24, 4] by [-2500, 4000, 500]. Then use the 2 nd – TRACE – maximum feature to calculate its maximum ...

*June 13, 2016*

**Calculus- Reiny **

Thanks for the help, but do you understand what Im suppoosed to graph on 2D d) Use a graphing calculator to sketch the graph of y = V(x). Use the viewing window [0, 24, 4] by [-2500, 4000, 500]. Then use the 2 nd – TRACE – maximum feature to calculate its maximum ...

*June 13, 2016*

**Calculus**

A rectangular piece of tin has an area of 1334 square inches. A square tab of 3 inches is cut from each corner, and the ends and sides are turned up to make an open box. If the volume of the box is 2760 cubic inches, what were the original dimensions of the rectangular piece ...

*June 13, 2016*

**math**

Would it be: (-1, 14) and (6,7)?

*June 13, 2016*

**math**

I'm still pretty lost.. :/

*June 13, 2016*

**math**

what are the solutions to the system? y=x^2 - 6x+7 y=-x+13

*June 13, 2016*

**Chemistry**

A Chemist wanted to determine the percentage of calcium carbonate in a sea shell. He collected a number of sea shells which he crushed into a fine powder. To 2.65 grams of sea shell powder he added 25.0mL of 5.0M Hydrochloric acid. When all the fizzing ceased, he filtered the ...

*June 13, 2016*

**math/algebra**

thank you so much. I thought so.

*June 9, 2016*

**math/algebra**

The surface area of a rectangular prism is SA=2lw+2wh+2lh. The volume of a rectangular prism is V=lwh. Write an expression for the ration of surface area to volume.

*June 9, 2016*

**chemistry**

Chromium (III) iodate has a Ksp at 25°C of 5.0 x 10–6. 125 mL of a solution contains 0.0050 mol L–1 Cr (III) ion. When 75.0 mL of the NaIO3 solution have been added, what is the concentration of the Cr(III) ion remaining in solution? not sure how ...

*June 9, 2016*

**chemistry**

The Kb of ammonia is 1.8 x 10–5. What is the percent ionization of a solution of ammonia, 0.50 mol L–1 NH3, that contains 0.020 mol L–1 of ammonium nitrate, NH4NO3? when i use the ICE table i dont end up with an unknown so im not sure what to do. ...

*June 9, 2016*

**chemistry**

thank you! :)

*June 8, 2016*

**chemistry**

At equilibrium, a solution of formic acid at 25°C has a pH of 2.18. The pKa of formic acid, HCOOH, is 3.74. Which of the following is the initial concentration of the solution? Not sure what to do my thoughts: use henderson hasselback equation pH = pKa + log [conj ...

*June 8, 2016*

**statistics**

the amount of pyridoxine in grams per multiple vitamin is normally distributed with mean = 110 grams and standard deviation = 25 grams. What is the probability that a randomly selected vitamin will contain between 100 and 110 grams of pyridoxine?

*June 3, 2016*

**algebra**

y varies inversely with x, and y = 10 when x = 2. What is the equation for the inverse variation?

*June 3, 2016*

**Chemistry**

When the ratio of neutron-to-proton dictates that a neutron must break down it will form a helium nucleus an alpha particle a proton and an electron*** Two protons

*June 1, 2016*

**Chemistry**

Which of the following materials is necessary to stop gamma radiation one foot of concrete single sheet of paper thin pieces of wood three inches of lead***

*June 1, 2016*

**Math**

vvvvvvvvvvvvvb

*May 29, 2016*

**Math**

hi

*May 29, 2016*

**Calc**

Find the number b such that the line y = b divides the region bounded by the curves y = 4x2 and y = 16 into two regions with equal area. (Round your answer to two decimal places.)

*May 27, 2016*

**math or algebra **

F2088nd the next three terms of the sequence. -2, -12, -72, 432. Possibilities are: 1. -1728 -6912 -27,648 2. -1728 -10,368 -62,208 3. -2592 -10,368 -41,472 4. -2,592 -15,552 -93,312 I have tried multiplying positive numbers times the negative but can't make the numbers ...

*May 22, 2016*

**MATH HELP !!!!!**

I know a fraction is the answer but can't make it work for the probability question asking for what is the chance you will pull a pink eraser out of a,container that has 5 green .2 striped.4 pink.and 3 white.?

*May 19, 2016*

**Math**

5 HOURSS IS THE ANSWER

*May 16, 2016*

**Math**

answer

*May 16, 2016*

**Math**

Square is 20 feet wide and 21 feet long what is the disdence from one corner to the other

*May 15, 2016*

**physics**

Three point charge of 2NC 7NC and - 4NC are located at the corners of an equilateral triangl as shown below. Caculate the magnitude and direction of the net force on the 7uc charge.

*May 9, 2016*

**physics**

Three point charge of 2NC 7NC and - 4NC are located at the corners of an equilateral triangl as shown below. Caculate the magnitude and direction of the net force on the 7uc charge.

*May 9, 2016*

**algebra**

a student measures the height of a sign to be 2 meters. the shadow of the sign 3 meters. the student notices that at the same time nearby tree has a shadow of 15.6 meters. how tall is the tree? What equation would be used for this?

*May 5, 2016*

**Chemistry **

Calculate the ph of a solution that is 0.157m HCI?

*May 4, 2016*

**LA**

Anonymous is right thanks

*May 4, 2016*

**Matthhh**

Two telephone poles are 60ft. apart, and one of them is 6ft. higher than the other. If the length of the wire between the poles is 61.3 ft., how much wire was allowed for sag?.

*April 30, 2016*

**Life orientation**

zuma's career! I hope this helped you on you're homework!

*April 27, 2016*

**Math**

To do this, you have to factor the radicand (or the number inside the radical sign) and look for perfect squares. For instance, 2 * √(48) 2 * √(16*3) 2 * √(4*4*3) Express the repeating factors using exponents, so it's easier to see. Since four is ...

*April 27, 2016*

**Life Orientation**

The 'disappearances' of detainees in the custody of Russian federal forces in Chechnya is a major human rights crisis that the Russian government and the international community must address." "While combat between federal forces and Chechen rebels has for ...

*April 27, 2016*

**Math(Radicals)**

I hope this helps! √≈1.7320508075688772

*April 27, 2016*

**ELA**

Maybe, don't frown mr brown

*April 25, 2016*

**ELA**

My little brown trout

*April 25, 2016*

**L.o**

I need the answers

*April 25, 2016*

**math**

Create sketches by hand of the following sine functions, showing at least one full period and state the domain and range. Submit them to your teacher using the drop box above. It may be easiest for you to scan your hand drawn sketches and submit the scan file. Part A: ...

*April 25, 2016*

**statistics**

the marks of 100 students in an examination are normally distributed with mean of 25 marks and a standard deviation of 10 marks. Given that the pass mark is 20, estimate the number of students who passed the examination.

*April 24, 2016*

**PROB**

What is minimum sample needed if you know the SD is 22.36 and an accuracy of 3.06 and you want a confidence level of 90%

*April 24, 2016*

**Math, NEEDS HELP EMEDIETLY!**

the sample size is 144

*April 22, 2016*

**algebra**

Never mind. I figured this one out on my own!

*April 20, 2016*

**algebra**

16oz of nails is to be made of a combination of nails one that costs four dollars per oz and another that costs eight dollars per oz. How many oz of each kind of nails would you need to equal 16oz of a mixture of nails that costs seven dollars per pound? What formula would I ...

*April 20, 2016*

**Calculus **

Equation: Suppose that the demand of a certain item is x = -0.7 p + 20. Evaluate the elasticity at E = 8. I'm not sure what steps to take to solve this. I know that elasticity is equal to the absolute value of [(p/q) x (dp/dq)]

*April 19, 2016*

**MATH**

whats the answer

*April 18, 2016*

**math**

ms sue how is it 16 ??

*April 12, 2016*

**Physics**

An electron is held 2.10 cm from an vertically aligned infinite charged plane and then released from rest. It accelerates toward the plane to the left and collides with a speed of 1.50×107 m/s .

*April 11, 2016*

**VISUAL BASIC PROGRAMMING**

3. WRITE A VISUAL BASIC PROGRAM TO CALCULATE THE SIMPLE INTEREST ON A LOAN AMONUT OF 50000 GHANA CEDIS AT AN INTEREST RATE OF 30% FOR A NUMBER OF YEARS WHICH WILL BE SPECIFIED BY THE USER.

*April 2, 2016*

**Math**

B because 4/52 is about 0.76

*March 30, 2016*

**Business Math**

The Principal of SACRO Primary is concerned that the average speed of cars travelling along Princess Road exceeds the recommended speed of 60km/h. A random sample of 10 cars had their speeds measured by radar and the results (in km/h) are as follows: 81, 53, 62, 79, 52, 68, 61...

*March 30, 2016*

**physics**

By looking at the sinusoidal wave graphed out, the period is T=1.0s. Which means in one second the d will be the same as the beginning. So we know that d0=2.0cm so d4 at 1.0s = d0 or 2cm. Then we know that half of that period would be the negative of the intial or d2 at .5s= -...

*March 30, 2016*

**us history**

I think it is B because the Declaration of Sentiments was published during the convention.

*March 29, 2016*

**us history**

I agree with B because it says best and all the other choices only described part of her career.

*March 29, 2016*

**us history**

Hello Think of what the word conversion means. It doesn't have to do with land areas or just one religion, it could be another beside Christianity, but Christianity was the main one. So now, what do you think?

*March 29, 2016*

**physics**

A laser beam passes from air into a 25% glucose solution at an incident angle of 37 ∘ . In what direction does light travel in the glucose solution? Assume the index of refraction of air is n = 1.

*March 27, 2016*

**math**

Alex is right- it is 9- look at his answer!! Guess it shows how sometimes kids are smarter than grown-ups!

*March 27, 2016*

**Science: Physics**

mr. slott at his fighting weight of 1000N jumps down from a platform meters above a trampoline with a spring constant (k) of 500N/M. How much does Mr.Slott strech the trampoline (x) before it brings him to a stop

*March 15, 2016*

**Social Studies HELP**

2. Which was a part of the Populist Party’s platform? (1 point) tax breaks for farmers*** civil rights for all Americans higher tariffs on foreign goods increased industrial development 3. Whom did Rebecca Latimer Felton replace when she was appointed a senator in the ...

*March 10, 2016*