Sunday

February 14, 2016
Total # Posts: 3,263

**science 207**

4. What can be done to prevent mine drainage from damaging the ecosystem? Utilize at least one scholarly resource to support your suggestions.
*June 29, 2015*

**algebra**

The diameter of the base of a cone is 5 ft, and the slant height is 7 ft
*June 16, 2015*

**chemistry**

The mechanism of solubility depends on the solute and solvent. Describe on an ionic or molecular scale how each of the following dissolve: a.NaCl in H2O b.I2 in CCl4 c.CH3CH2OH in H2O
*June 16, 2015*

**chemistry**

so x=6.08*10-3 and then I use the gram equivalent weight of Al(OH)3 to get grams per Litre? I got 0.474 g per litre, is the correct?
*June 16, 2015*

**chemistry**

That is the Ksp I was given
*June 16, 2015*

**chemistry**

The ksp for Al(OH)3 is 3.7*-5 at 20 degrees. What is the solubility of Al(OH)3 in grams per litre?
*June 16, 2015*

**chemistry**

thanks I understand now
*June 16, 2015*

**chemistry**

The concentration of Mg2+ ion in a solution is 0.010M. At what pH will Mg(OH)2 first precipitate? (Given Ksp Mg(OH)2 equals 1.2*10-11)
*June 16, 2015*

**Chemistry**

I tried the HH equation and got pH=4.92 when I placed the acid on top of the fraction and that was wrong. I got 4.61 when I placed the citrate on top and that was also wrong...
*June 16, 2015*

**Science 207**

Lab 2 – Water Quality and Contamination Experiment 1: Effects of Groundwater Contamination Table 1: Water Observations (Smell, Color, Etc.) Beaker Observations 1 2 3 4 5 6 7 8 POST LAB QUESTIONS 1. Develop hypotheses on the ability of oil, vinegar, and laundry detergent ...
*June 15, 2015*

**Science 207**

Lab 2 – Water Quality and Contamination Experiment 1: Effects of Groundwater Contamination Table 1: Water Observations (Smell, Color, Etc.) Beaker Observations 1 2 3 4 5 6 7 8 POST LAB QUESTIONS 1. Develop hypotheses on the ability of oil, vinegar, and laundry detergent ...
*June 14, 2015*

**Physics**

A small rock is thrown vertically upward with a speed of 17.0m/s from the edge of the roof of a 22.0m tall building. The rock doesn't hit the building on its way back down and lands in the street below. Air resistance can be neglected. 1. what is the speed of the rock just...
*June 8, 2015*

**Simmons**

A 2.0 kg box rests on a plank that is inclined at an angle of 65° above the horizontal. The upper end of the box is attached to a spring with a force constant of 17 N/m, as shown in the figure. If the coefficient of static friction between the box and the plank is 0.30, ...
*May 8, 2015*

**SOC120**

Florynce Kennedy would agree with which statement? A. Making abortion illegal is the result of continual undermining of women’s rights. B. If men could get pregnant, abortion would be illegal. C. Women have had historical power to make decisions about legislation that ...
*May 2, 2015*

**chemistry**

What is the resulting concentration when 250.0 mL of 0.65 M Magnesium Sulfate is added to 800.0 mL of water?
*May 1, 2015*

**Math**

How do you tell whether a number is a perfect square from the exponents of its prime factorization? Explain why this works.
*April 29, 2015*

**math**

555 / 3 = 185 Jason must sell 185 carrots.
*April 29, 2015*

**micro**

We assume that when a firm hires additional workers, the marginal physical product of labor will: 1. decrease because each worker now has less capital and other resources to work with. 2. decrease because the new workers are likely to be less able than the previously hired ...
*April 21, 2015*

**English**

nope^^
*April 19, 2015*

**Science**

1. A weatherman reports, "the storm waves are about 2 meters high and about 35 meters apart. "what properties of waves is the reporter describing? Frequency and wavelength Wavelength and wave speed***** Amplitude and wavelength Amplitude and frequency 2. Sound proof ...
*April 15, 2015*

**Chemistry**

I am working on a five-part question and I just need help with the last part. I'm not sure where to begin with that one. I pasted the question and answers (for a-d) to the other parts below. Thank you! Consider the proposed mechanism for the reaction between nitrogen ...
*April 14, 2015*

**English**

Christmas is around the corner... begin corner
*April 9, 2015*

**Business**

Applegate Industries is planning to expand its production facility in a few years. New plant construction costs are estimated to be $4.50 per square foot. The company invests $850,000 today at 8% interest compounded quarterly. How many square feet of new facility could be ...
*March 25, 2015*

**math**

You are almost there. You have everything right except the 10% off. $210*.10=21 $210-21= $189.
*March 25, 2015*

**Science**

hi could you please help with the following question: In humans, free ear lobes is dominant to attached ear lobes. A male who is pure breeding for free ear lobes marries a woman who is pure breeding for attached ear lobes. What type of ear lobes will the children. (Including a...
*March 21, 2015*

**chemistry**

To identify a diatomic gas (X2), a researcher carried out the following experiment: She weighed an empty 2.8-L bulb, then filled it with the gas at 1.20atm and 22.0 ∘C and weighed it again. The difference in mass was 3.9g . Identify the gas.
*March 19, 2015*

**statistics**

(10 pts) Using diaries for many weeks, a study on the lifestyles of visually impaired students was conducted. The students kept track of many lifestyle variables including how many hours of sleep obtained on a typical day. Researchers found that visually impaired students ...
*March 17, 2015*

**chemistry**

a solution is prepared by dissolving145 grams of NaNO3 in 100 grams of water at 80*C. the solution is then cooled to 10*C. how much of the solute will come out of the solution?
*March 9, 2015*

**chemistry**

As a result of mineral erosion and biological activity, phosphate ion is common in natural waters, where it often precipitates as insoluble salts, such as Ca3(PO4)2. Calculate Qsp when [Ca2+]init = [PO43-]init = 2.161 10-6 M in a given river. Ksp of Ca3(PO4)2 = 1.2 ✕ 10...
*March 6, 2015*

**chemistry**

If silver phosphate has a Ksp of 2.28e-16 at a certain temperature, what is the molar solubility of silver phosphate at the same temperature?
*March 6, 2015*

**MATHS**

In this addition each letter represents a digits. Different letters represent different digits. LASS +LAD ---------- LOVE I GOT SO MANY POSSIBLE RESULTS FOR THIS QUESTION EG. 4511 + 452=4963 5422 + 541 = 5963 Could you please explain how to do this question? The correct answer...
*March 6, 2015*

**Physics**

Bob starts spinning his hammer at a rate of 2.00 rad/s^2. At the same time, he starts running towards Jim at 4.00 m/s^2. The distance from the end of the hammer to Bob's elbow is 1.20 m. If Bob takes 3 seconds before he launches the hammer at Jim, what is the resultant ...
*March 4, 2015*

**Algebra**

either
*March 3, 2015*

**Algebra **

13 1/3 divided by 22 1/2
*March 3, 2015*

**grammar**

The task was to add commas in the correct places. Did I place them correctly in the sentence below? One of the greatest classes he ever took was after school, as many of his friends left, he had to go to band practice, play the drums, guitar, and saxophone. (Personally, I ...
*March 2, 2015*

**grammar**

The task is to find the subject pronoun. The sentence is: Tell her that her parents will pick her up. My thought is that the subject pronoun would be the implied "You" before the word tell. Is that right or wrong? Thanks!
*March 2, 2015*

**personification **

On scary tree
*March 2, 2015*

**English**

What sentence type is this? Gas prices are very high right now, consumers are looking for cars that get high miles per gallon.
*February 22, 2015*

**algebra**

One number is twice a second number. The sum of those numbers is 45. Find the numbers.
*February 17, 2015*

**math**

The perimeter of a rectangular blanket is 18 feet.What could be it's length and width?
*February 16, 2015*

**MATHS**

A proper fraction with numerator 2 lies between a quarter and a half. Write down the greatest such fraction.. Thanks for your help
*February 11, 2015*

**maths**

Seven guns all commence firing together at a target but they continue to fire at interval 2,3,5,7 and 12 minutes. After how many hours do all five guns fire at the same time as they did in the beginning? Thanks for helping
*February 11, 2015*

**PSC**

If y is directly proportional to x and y = 65 when x = 33, find y if x = 44 . (Round off your answer to the nearest hundredth.)
*February 9, 2015*

**stats**

On a test of motor coordination, the population of average bowlers has a mean score of 24, with a standard deviation of 6. A random sample of 30 bowlers at Fred's Bowling Alley has a sample mean of 26. A second random sample of 30 bowlers at Ethel's Bowling Alley has a...
*February 8, 2015*

**MATHS**

Long ago when apples were cheap, two ladies went to market and each sold 30 apples on different stalls; Mrs Rosy sold hers at 2 for a penny, Mrs Juicy at 3 for a penny. The next week they decided to share a stall and sell 60 apples between them at 5 for 2 pennies. At the end ...
*February 8, 2015*

**SS**

I can't use this .
*February 7, 2015*

**SS**

Ms. Sue Can You Help Me Answer This Question? During the early 1800s, the United States tried to make peace with other countries in order to grow and develop. Give an example of one of these peace efforts and briefly explain what it hoped to accomplish.
*February 7, 2015*

**math/algebra**

A total of 770 tickets were sold for the school play. They were either adult tickets or student tickets. There were 70 more student tickets sold than adult tickets. How many adult tickets were sold?
*February 5, 2015*

**L.A**

Abby it is B
*January 27, 2015*

**MATHS**

Pipe A can fill a swimming pool in 10 hours.Pipe B can fill the same pool in 8 hours. If pipe A and pibe B work together for the first 2 hours and then pipe B stops working, how long will it take pipe A to finish the job?
*January 26, 2015*

**chemistry**

Thank you very much!
*January 25, 2015*

**chemistry**

Diborane (B2H6) is a highly reactive boron hydride, which was once considered as a possible rocket fuel for the U.S. space program. Calculate ∆H for the synthesis of diborane from its elements, according to the equation 2 B (s) + 3 H2 (g) → B2H6 (g) using the ...
*January 25, 2015*

**math**

Need help with inequality. If pet store sells at least 3 times more male birds as female birds, and x represents female birds and y represents male birds. Would the inequality be written as y >=3 ? Why or why not? Thanks
*January 25, 2015*

**chemistry**

Thanks! Here's my answer, but I don;t know if it is correct: 5000KJ=50,000g/55.85 g/mol*25.08j/ mol k *(T high-15C); 5000kj=22452.99 (T high-15C); (T high-15C)=5000kj/22452.99J mol–1 K–1/1000, T high-15C=222.69, T high=22.69+15=238C
*January 24, 2015*

**chemistry**

Calculate the final temperature if 50 kg of iron is heated from 15.0°C with 5000 kJ of heat. The molar heat capacity of iron is 25.08 J mol–1 K–1.
*January 24, 2015*

**Mat 116 - Algebra**

Simplify x^2*x^3*x^4
*January 18, 2015*

**Physics**

A car accelerates at a rate of 5m/s2 for a period of 4.2 seconds and then moves at a constant speed for 8 seconds more. How far did it travel?
*January 17, 2015*

**college/education**

Why is if logical to write test items or assessments before producing instructional strategies
*January 15, 2015*

**algebra 2**

What is a quartic function with only the two real zeros given? x = -4, x = 1
*January 7, 2015*

**math problem solving**

joe has a collection of 35 dvd movies. he receives 8 of them as gifts. joe bought the rest of his movies over 3 yrs. if he bought the same number of movies each year, how many movies did joe buy last year?
*January 5, 2015*

**chemistry**

2Mg + O2 ==> 2MgO 1g Mg/24.3g=0.041 molMg, 0.041mol/2mol=0.0205 mol Mg; 0.5L O2/22.4L=0.0223 molO2; So Mg is the LR(0.0205mol Mg<0.0223 molO2); 0.041 molx40.3g MgO/mol=1.65g MgO2. 0.022molO2-0.0205molMg =0.0018 mol O2 inexcess. Thanks!
*December 30, 2014*

**chemistry**

0.041mol Mg-0.022mol O2=0.019mol Mg inexcess. Thank you!
*December 30, 2014*

**chemistry**

Thanks a lot! Here's original question: If 1.00 of magnesium is ignited in a flask containing 0.500 liter of oxygen at STP, how many grams of magnesium oxide are produced? My work: Mg + O2 ------> MgO2, is this right?
*December 30, 2014*

**chemistry**

Mg + O2 ------> MgO if 1.00 g of magnesium is ignited in a flask containing 0.500liters of oxygen at STP, how many grams of magnesium oxide areproduced? what is the name and the amount of the reactant inexcess? My work: 1g Mg/24.3g=0.041 mol Mg; 0.5L O2/22.4L=0.022 mol O2; ...
*December 30, 2014*

**Chem**

Mg + O2 ------> MgO if 1.00 g of magnesium is ignited in a flask containing 0.500liters of oxygen at STP, how many grams of magnesium oxide areproduced? what is the name and the amount of the reactant inexcess? My work: 1g Mg/24.3g=0.041 mol Mg; 0.5L O2/22.4L=0.022 mol O2...
*December 30, 2014*

**math**

total attendance is 520
*December 17, 2014*

**math**

3.75a + 2.50s = 1518.75 what is a and s equals to?
*December 17, 2014*

**biology**

Explain how a scientist would use DNA or protien sequences taken from three different organisms to create a cladogram
*December 17, 2014*

**Why am i bad at Reading Comprehension - English **

i am good at English but every time we have a reading comprehension, i either fail it or get a bad mark. WHY. all i have to do is read it and answer question of what i just read. But i still get a bad mark. How can i prepare myself for the next one. i wan tot be good at it. By...
*December 17, 2014*

**biology**

Explain how a scientist would use DNA or protien sequences taken from three different organisms to create a cladogram?
*December 17, 2014*

**Geometry**

By the water cooler in an office, there are conical paper cups. The radius is about 1.2 inches and the height is about 3.5 inches. How much water does the cup hold if it is filled to the top?
*December 13, 2014*

**Math**

5 Σ 4(3/4)^k k=0 Find the sum of the series. Round the answer to three decimal places.
*December 12, 2014*

**PHI 208**

Hill uses this technique in the middle of the article to examine ideas about the human’s place within nature A)He presents specific factual examples that demonstrate harm to the environment. B)He presents a fictional example of a perfect island. C)He asks the reader to ...
*December 8, 2014*

**math**

A fair 6 sided dice is marked with the numbers 1, 2, 3, 4,5, and 6. The dice is rolled three times and the results are added. How many different sums are possible?
*December 8, 2014*

**math**

Francis is baking cookies. The recipe for chocolate chip cookies calls for 2 2/3 cups of flour, the recipe for peanut butter coolies calls for 2.75 cups, the recipe for ginger snaps calls for 5/2 cups. If francis wants to use as little flour as possible, which cookie whould he...
*December 8, 2014*

**math**

An animal shelter has 24 large cages and 42 small cages that need to be cleaned. The director of the shelter wants to divide the work so that each person cleans the same number of large cages and the same number of small cages. What is the largest number of people he can use ...
*December 8, 2014*

**health**

Your views
*December 7, 2014*

**lea**

book title of the watsons go to birmingham 1963
*December 5, 2014*

**algebra**

For each of the rational functions find: a. domain b. holes c. vertical asymptotes d. horizontal asymptotes e. oblique asymptotes f. y-intercept g. x-intercepts 1. f(x)= x^2+x-2 / x^2-x-6
*December 4, 2014*

**Geomatry **

For each of the rational functions find: a. domain b. holes c. vertical asymptotes d. horizontal asymptotes e. oblique asymptotes f. y-intercept g. x-intercepts 1. f(x)= x^2+x-2 / x^2-x-6
*December 4, 2014*

**science**

Sarah wants to use a model to get an idea of how far away the stars are. She uses a marble to represent the Earth, and she places a basketball 1 m away to represent the Sun, which is the nearest star. If Sarah wishes to keep the distances between objects in her model at an ...
*December 2, 2014*

**Maths**

Angelo shot 4 darts at a target. Three landed in area A and one landed in area B giving him a total score of 16. Dan shot 4 darts too. One landed in A and three landed in B giving a total of 24. What score would be made hitting B three times?
*November 20, 2014*

**L.A.Help!!!!!!**

thank you reality check
*November 17, 2014*

**Math **

Find the exact value and approximate. 11^ -x+4 = 5^ 3x-2 (-x+4)log11 = (3x-2)log5
*November 11, 2014*

**pharmacy math**

Prepare 180 g of Lotrimin 0.05% cream. In stock, you have 200 g each of Lotrimin 0.025% cream and Lotrimin 0.1% cream. How much is needed of each?
*November 10, 2014*

**chemistry**

so what is the exact anwser?
*November 9, 2014*

**Science**

Calculate the kinetic energy change in the water that occurs when 10,000lb/hr flow in a pipe that is reduced from a diameter of 2 in. to a diameter to 1 in.
*November 7, 2014*

**college math**

1. A farmer has 1000 acres of land on which corn, wheat, or soybeans can be grown. He also knows that each acre of corn requires 5 days of labor and yields a profit of $20. Each acre of wheat requires 9 days of labor and yields a profit of $40. Each acre of soybeans requires ...
*November 6, 2014*

**physics**

Force constant= Force/ Extension = (1×9.8)/ (1/100) N/m =9.8×100=980N/m
*November 6, 2014*

**physics**

Force constant= Force/ Extension = (1×9.8)/ (1/100) N/m =9.8×100=980N/m
*November 6, 2014*

**chemistry**

What does a slash (/) mean in chemistry?
*November 6, 2014*

**math**

how to write 15>3x into word problem?
*November 3, 2014*

**English**

what would a declarative sentence be? Would this be right It is a nice day today.
*November 2, 2014*

**English**

Hi Miss Sue, Here is the final draft can you check it for me? Thank you Dear Grandmother Irene Happy Birthday to you on this special day! Shine like a star today on your Birthday. Have a wonderful time at your Celebration Party. Wishing you all the best on your Birthday. How ...
*November 2, 2014*

**English**

Think I got it now is this right?
*November 2, 2014*

**English**

Miss Sue what would the sentence be May all your dreams come true be?
*November 2, 2014*

**English**

Miss Sue is this correct thank you
*November 2, 2014*

**English**

I'll be glad to comment on your sentences. • English - Lisa, Sunday, November 2, 2014 at 6:40pm Birthday Card Happy Birthday to you on this special day! (E) Shine like a star today. (D) How old are you today? (In) Have a wonderful time at your celebration party (Imp...
*November 2, 2014*

**English**

WHat would an imperative sentence be?
*November 2, 2014*

**English**

I think I need an imperative sentence?
*November 2, 2014*