Tuesday

October 13, 2015
Total # Posts: 219

**Chemistry**

A water treatment plant adds fluoride ion to the water to the extent of 1.5mg F-/L H2O. a)What is the molarity of fluoride ion in this water? b)If the fluoride ion in the water is supplied by calcium fluoride, what mass of calcium fluoride is present in 1.00 x 10^6 L of this ...
*October 13, 2015*

**Chemistry**

What volume of 0.149 M HCl must be added to 1.00x10^2 mL of 0.285 M HCl so that the resulting solution has a molarity of 0.205 M? Assume that the volumes are additive.
*October 12, 2015*

**Chemistry**

Nitric acid, HNO3, is produced from ammonia and oxygen by the consecutive reactions: 4NH3 + 5O2 => 4NO3 + 6H2O 2NO + O2 => 2NO2 3NO2 + H2O => 2HNO3 + NO How many grams of nitric acid can be obtained from 1.00kg NH3 if NO in the third reaction is not recycled? Why is ...
*October 11, 2015*

**Chemistry**

Thank you so much!
*October 11, 2015*

**Chemistry**

Reaction: C6H11OH(l) ==> C6H10(l) + H2O(l) Calculate the mass of cyclohexanol (C6H11OH) needed to produce 45.0g cyclohexene (C6H10) by reaction if the reaction has a 86.2% yield and the cyclohexanol is 92.3% pure. Usually this problem would be fairly easy, but the purity is...
*October 11, 2015*

**Maths**

A rectangular floor measures 10m by 6m. A piece of rectangular carpet measuring 6m by 4m is placed in the middle of it. Calculate the area of the UNCOVERED floor.
*October 11, 2015*

**Maths**

A floor is measuring 8 metres by 6 metres is covered with carpet. If carpet costs $25.00 per square metres, calculate the cost of the carpet for the floor.
*October 11, 2015*

**Chemistry**

Thank you so much!
*October 10, 2015*

**Chemistry**

A particular vinegar contains 4.0% CH3COOH by mass. It reacts with sodium carbonate to produce sodium acetate, carbon dioxide, and water. How many grams of carbon dioxide are produced by the reaction of 5.00 mL of this vinegar with an excess of sodium carbonate? The density of...
*October 10, 2015*

**math**

Ashley had an equal number of dimes and quarters until she gave 15 quarters away. She now has $ 22.50 in dimes and quarters. How many dimes does she have?
*September 23, 2015*

**English**

8. A 9. i thought it was like about today and how we learn about it now, sorry. my answer is b ? 10. c
*September 21, 2015*

**English **

Check my answers please?? Match the litter of the author with his or her description. Not all letters will be used. A. William Bradford B. Captain John Smith C. Anne Bradstreet D. Okaudah Equiano E. Thomas Paine F. Thomas Jeffereson 1. I wrote an account of my voyage across ...
*September 21, 2015*

**Chemistry**

Starting with copper metal, describe how a sample crystals of copper 2 chloride may be prepared in the labaratory
*August 12, 2015*

**Chemistry**

Swirl the reaction mixture gently and pour a little at a time
*August 12, 2015*

**Chemistry**

Explain how you would obtain solid sodium carbonate from a mixture of lead carbonate and sodium carbonate powder
*August 12, 2015*

**Benue State University Makurdi**

Decrease
*August 5, 2015*

**Hlalukweni**

Will i be able to become a social worker or psycology if i do geography,life sciences,maths lit and consumer studies?
*July 2, 2015*

**english**

i actually dont have an idea on what to write
*June 27, 2015*

**english**

i was ask to writ some topic sentence on how to tame a wild tongue i actually need help
*June 27, 2015*

**math**

James get two point and Gina get one point is ti fair
*April 27, 2015*

**math**

the volume of a cylinder is 54cm cube.calculate the volume of the cone.
*April 27, 2015*

**Math**

In how many ways can a 15-question true-false exam be answered? (Note: No questions are taken away)
*April 23, 2015*

**Algebra**

when writing linear equations, how do you determine which form of a line to use? choose 1 set of points from the choices below. then, solve the problem and post your solution, showing your steps. write an equation in point-slope form for the line that passes through one of the...
*December 9, 2014*

**math**

What do you do to find a rate?
*October 8, 2014*

**science**

How is a single replacement reaction different from a double replacement reaction? I am having trouble telling which on is which.
*October 8, 2014*

**Math**

What is the answer to the equation 85.3 - 23.58 = ?
*October 8, 2014*

**Math Homework**

Hi! I really need help with these. I tried them on my own but I got really confused. Thanks! 1.) If f(x)=1/x and g(x)=1/x^2, find the domain of g/f 2.) If h(x)=4/(5x+2)^2, find the two functions f and g so that f(g(x))=h(x).
*September 28, 2014*

**Math**

Pizza cost $1.50per slice. Use a table and an equation to represent the relationship between the number of slices of pizza bought and the total cost?
*September 23, 2014*

**Pre-Calculus**

Hi! I need help with these two. Here's the link for both pictures. 1.) Determine the intervals over which the function is increasing, decreasing, or constant. Write your answer in interval notation. Link for photo: file:///C:/Users/Cynthia/Downloads/Save.PNG 2.) Determine ...
*September 19, 2014*

**Math**

160,656 underlined is 1
*September 16, 2014*

**math**

draw a picture showing 4 pencils and a number of pens in which the ratio of pencils to pens is 2:3.
*June 3, 2014*

**math**

42
*May 7, 2014*

**Math**

A vendor at a concert sells new and used CDs. The new CDs cost 2.5 times as much as the old CDs. If 4 used CDs and 9 new CDs cost $159, what is the price of each item?
*April 9, 2014*

**Urgent Calc Help!!! Thanks!**

Find the absolute maximum and absolute minimum values of f on the given interval. f(x) = xe^((−x^2)/98), [−6, 14]
*April 1, 2014*

**World Geography**

Founded in 1967, ASEAN did little to foster economic cooperation until proposed a free-trade area in 1991
*March 23, 2014*

**physical science**

what is the velocity of ironman if he travels up 2,000 meters in 8.6 seconds
*February 11, 2014*

**english 4**

Harry's father is seattle's wealthiest citizen?
*December 20, 2013*

**Maths**

Find out X 25^x=1/^3square root 5 27^x+5=9^2x-1 8x16^x-1 =4^3x
*December 1, 2013*

**Physics**

Nevermind I got it.
*November 18, 2013*

**Physics**

An electromagnetic wave in a vacuum traveling in the +x direction generated by a variable source initially has a wavelength of 2.65 x 10^-4 m and a maximum electric field Emax in the +y direction of 8.20×10^−3 V/m. What are the coefficients in the equation for the ...
*November 18, 2013*

**Physics mechanics**

A piece of cord 2.5m is connected between two points 2m apart horizontally. A massless pulley is placed on the cord and a force 20N at angle - 80 degrees is applied to it. 1. Show that when the pulley reaches a state of rest, the angle that the positions of the cor make with ...
*November 3, 2013*

**Earth Science (Geography)**

In what way can the soils, geology and slopes affect river flow?
*October 28, 2013*

**Algebra**

Mary’s yard is a mess. She needs to hire someone to prune her trees and shrubs. A landscaping service she calls quotes her a price of $15 consultation fee plus $8 an hour for the actual work. Mary’s neighbor has offered to help her out. She doesn’t charge a ...
*October 23, 2013*

**algebra**

the printed matter on a 10 by 16 centimeter page of a book must cover 40 square centimeters. if all margins are to be the same width, how wide should they be?
*October 20, 2013*

**math**

Describe a method you can use to shorten the list of possible rational zeros when using the rational zero theorem? I know how to do the problems, I just don't know how to shorten that method. Please help me.
*October 17, 2013*

**science plz help right now!!!!**

is is a copy of a test
*October 17, 2013*

**Math**

what is 8x25x23 in mental math use subtraction
*October 3, 2013*

**Math**

Can I get some help with this question please? Calculating break-even. Jasmine Gonzales, administrative director of Small Imaging Center, has been asked by the practice members to see if it is feasible to add more staff to support the practice’s mammography service, which...
*August 11, 2013*

**Math**

Ned’s Sheds purchases building materials from Timbertown Lumber for $3,700 with terms of 4/15, n/30. The invoice is dated October 17. Ned’s decides to send in a $2,000 partial payment. By what date must the partial payment be sent to take advantage of the cash discount?
*May 25, 2013*

**math**

How would I figure out a random tile grid pattern for a room that is 25'1" in length and 12'7" in width with tile that is 16"x16" and 12"x12" with the majority being 12"x12"?
*May 10, 2013*

**math**

what is the ratio 7.5 to 3.25 in lowest term?
*May 3, 2013*

**life orientation**

Identify and describe 3 environmental health hazards that cause ill health,crises and disasters within any other community within south africa and globally
*May 1, 2013*

**physics**

a player kicks a soccer ball from ground level and sends it flying at an angle of 30 degrees at a speed of 28 m/s. what is the maximum height attained by the ball? Round the answer to the nearest tenth of a meter.
*April 9, 2013*

**Pre algebra**

Idk
*March 25, 2013*

**consumers math**

Jon put 1000$ into each of two different simple interest savings accounts for one year . The total intrerest earned was 5$. What could the interest rate have been for each account ?
*March 15, 2013*

**Chem**

If 7.60 kJ of heat is needed to raise the temperature of a sample of metal from 10.°C to 25°C, how many kilojoules of heat will be required to raise the temperature of the same sample of metal from 35°C to 53°C?
*March 13, 2013*

**Chemistry**

If 7.60 kJ of heat is needed to raise the temperature of a sample of metal from 10.°C to 25°C, how many kilojoules of heat will be required to raise the temperature of the same sample of metal from 35°C to 53°C?
*March 13, 2013*

**Math 6th grade**

I am having trouble with Input output for this problem, I can't figure out the function rule input x= output y= 2 1 3 0 4 -1 Please Help!
*February 25, 2013*

**Math**

Contruct a triangle RST in a way that TR=31 mm, RS=62 mm and angle STR=60 degrees....
*January 24, 2013*

**math**

look at the numbers below describe the pattern 75, 74,72,69,65, what is the next two numbers in the pattern
*January 8, 2013*

**Language**

Thank you so much Ms. Sue..
*November 15, 2012*

**Language**

For each sentence, underline the action verb in the parentheses that creates a more vivid picture. 1. We (sit, lounge) on the big chairs near the pool..I underlined lounge. 2. The horses (go, gallop) across the field. I underline gallop. 3. Minna and Max (gulp, eat) their ...
*November 15, 2012*

**French**

i need help with the answers ! i know one is j'ai mal aux yeux. i need help with the rest this is my last assignment until january.
*November 10, 2012*

**French **

In this assignment, you are going to say what part of the body hurts you after reading the sentence that is there. Ce devoir vaut 20 points. Tu as vu la télévision pendant 5 heures. Tu as mangé beaucoup de chocolats. Tu as bu beaucoup d'eau aprè...
*November 10, 2012*

**phyics**

So Richard is traveling 125 miles and covers this distance in 65mph. This is Richards intial time 1.92 hour (125m/65mph). The final time which is him covering the same distance in 72mph is 1.74 h (125m/72mph). To determine how much time he saves just take the difference of the...
*September 11, 2012*

**math**

Adult tickets for a play cost $19 and child tickets cost $10. If there were 35 people at a performance and the theatre collected $476 from ticket sales, how many adults attended the play
*July 21, 2012*

**math**

(2x-3y)(2y+3x)
*July 19, 2012*

**fundamental of electricity**

{[(20+5)//10ohms]+5ohms}//10ohms
*July 19, 2012*

**math**

When stacking bags of dog food, the heaviest items should be placed at the bottom. Starting at the bottom, in what order should bags of dog food weighing 25 pounds, 20 pounds, 30 pounds, and 28 pounds be stacked?
*June 16, 2012*

**Neoclassicism I english 11**

these are the only anwsers i need on my final to graduate.!!
*June 16, 2012*

**Life Orientation**

What are the factors contributing to lack of physical fitness and proper nutrition in the adolescent
*May 11, 2012*

**physics**

The acceleration is 9.8m.s
*May 11, 2012*

**math**

an oil drum is 8ft high and 2 ft in diameter if the drum is half full how much is in cylinder. please show explanation
*April 22, 2012*

**Leadership**

Rising Cost of Health Care
*April 10, 2012*

**Chemistry**

Calculate the amount of energy required to change 32.8 grams of BF3 from -32 degrees celsius to 56 degrees celsius.
*April 3, 2012*

**math**

84.m 3
*March 29, 2012*

**chemistry**

redox reaction..types of redox reaction and explain
*March 15, 2012*

**chemistry**

consider the following equilibrum reaction: 2NO yield N2 + O2. Take:delta H=-18.0KJ/M
*March 13, 2012*

**chemistry**

consider the following equilibrum reaction: 2NO yield N2 + O2. Take:delta H=-18.0KJ/M
*March 13, 2012*

**chemistry**

balance the equation: Io^3 + I yield H2O + I^2
*March 13, 2012*

**chemistry**

the reaction is: 2NO yield N2 + O2
*March 13, 2012*

**chemistry**

state and explain how the concentration of nitrogen gas would be affected by an increase in pressure
*March 13, 2012*

**chemistry**

state and explain how the concentration of nitrogen gas would be affected by an increase in pressure
*March 13, 2012*

**chemistry**

state and explain how the concentration of nitrogen gas would be affected by an increase in temperature
*March 13, 2012*

**chemistry**

under rate of reactions Fe^2+ + Cr2o7^2- » Cr^3+ +Fe^3+
*March 11, 2012*

**chemistry**

rate of reactions Fe^2+ + Cr2O7^2- » Cr^3+ +Fe^3+
*March 11, 2012*

**chemistry**

solve under rate of reaction: 1)Mno4^- + Fe2^+=Mn2^+ + Fe3^+
*March 11, 2012*

**chemistry**

solve under rate of reaction: 1)Mno4^- + Fe2^+=Mn2^+ + Fe3^+
*March 11, 2012*

**chemistry**

solve under rate of reaction: 1)Mno4^- + Fe2^+=Mn2^+ + Fe3^+
*March 11, 2012*

**math**

a student misses 2 days of school out of 25 days. what is the probability that the student will be absent on the 26th day of school
*February 23, 2012*

**agricultural science**

examples of planted in an acidic soil and examples of crops planted in an alkaline soil
*February 20, 2012*

**chemistry**

using a litmus paper only,how would you distinguish between HN4 and NaCl
*February 20, 2012*

**chemistry**

how can H2O and ethanol be seperated
*February 20, 2012*

**chemistry**

how can sand and iodine crystals be seperated
*February 20, 2012*

**chemistry**

state what will be observed on heating Pbco^3
*February 20, 2012*

**MATH ( ms. sue)**

i understand you divide 56 by 15 but it comes out to 3.733333333 and i don't understand how to convert that into 3 11/15
*February 17, 2012*

**math HELP**

How would I change the improper fraction 56/15 to mixed number in lowest terms? the problem is 2 2/3 x 1 2/5 Ive figured out how to get to 56/15 but get stuck finishing it... MULTIPLYING WITH MIXED NUMBERS
*February 17, 2012*

**Math**

bu ne lan boyle
*February 15, 2012*

**chemistry**

why is AgNO3 stored in an amber bottle
*February 13, 2012*