# Posts by Lisa

Total # Posts: 3,421

**Chemistry**

A sample of nitrogen gas is collected over water at a temperature of 23 degrees C. What is the pressure of the nitrogen gas if the atmospheric pressure is 795 mm HG? Anser in units of mm Hg.

**Chemistry**

A student determines the freezing point of a solution of 1.96g of naphthalene in 25.64g of paradichlorobenzene(PDB). The following temperature-time reading are recorded. PDB/Napthalene Time(Min) 0 0.5 1.5 2 2.5 3 3.5 4 4.5 Temp(°C) 59.7 58.0 54.8 53.4 52.1 50.9 49.5 49.6 ...

**Chemistry**

A student determines the freezing point of a solution of 1.96g of naphthalene in 25.64g of paradichlorobenzene(PDB). The following temperature-time reading are recorded. PDB/Napthalene Time(Min) 0 0.5 1.5 2 2.5 3 3.5 4 4.5 Temp(°C) 59.7 58.0 54.8 53.4 52.1 50.9 49.5 49.6 ...

**algebra**

15 less than one-ninth of P

**Physics**

An aircraft piston engine starts from rest and accelerates to 1500rpm in 4.95s. This engine through a reduction gearbox drives a 9m diameter propeller at 55rpm What is the engine's angular displacement in 4.95s?

**Math**

6*2,6*20,and 6*200

**Math**

Divide the reciprocal of -12 by -1/3? the answer I came up with is 1/4, is this correct?

**math**

one radio station broadcasts the weather every 8 minutes and other station broadcasts a commercial every 4 minutes. Another station plays a "Golden Oldie" every 6 minutes. If all three of the stations broadcast both a weather forecast, a commercial, and play a "...

**Math**

Find the derivative: Write answers without negative or rational exponents. f (x)= 2 g (x) = 3x(4power)+ 6x(3power)-1

**Physics**

If you throw a ball straight up at 10 m/s and release it 2m above the ground: a) What height will the ball reach V^2=u^2+2as 0=100+19.6s s=5.1+2 s=7.1m b)How long after you release the ball will it hit the ground? (Answer should be 2.22s but need help getting there)

**science**

Many chemical salts come as hydrated crystals. That is, there is a specific ratio of water molecules associated with the salt crystals e.g. MgSO4.7H2O (called Magnesium sulphate heptahydrate FW = 246.5) has 7 water molecules to every Mg2+ and SO42- ion pair. But it is also ...

**Chemistry**

average atomic mass of isotopes

**Science**

A student mistakenly used an ethanol solution containing an unknown ionic compound in part C of the experiment. How would this affect the Van't Hoff factor determined experimentally? Justify your answer with an explanation.

**microsoft power point**

10. You're creating a table for one of your slides, and need to make some modifications to your table structure. Which of the following options can you perform by right-clicking inside the table? A. Merge cells B. Invoke Excel spreadsheet C. Create SmartArt D. Create a ...

**Gen edu 499 quiz critical thinki**

The very large increase in allergies over the last thirty years is due to the great success of immunizations administered over this time period. Since immunizations have nearly eliminated life-threatening diseases such as polio, the human immune system increasingly targets ...

**general education 499 wk 4 quiz**

people have claimed that Jamie's paintings have given them the blues. Clearly this cannot be entirely correct. Since many of James paintings contain no blue at all.

**micosoft 2013**

20. Which of the following processes should Angel use to merge cells A1:D4 to create a title? A. Highlight cells A1:D4, click on the Home tab, and click on the Wrap text icon in the Alignment group. B. Highlight cells A1:D4, right-click and select Format Cells, click Alignment...

**microsoft 2013**

19. Which of the following identifies the patterns used for each data series in a chart? A. Data point B. Data series C. The horizontal and vertical axes D. Legend

**microsoft 2013**

10. David has a small business and is working on an Excel worksheet to help manage his inventory. David realizes cell E14 has the wrong output. To check the problem, David should first select cell E14 and look at the _______ to check the formula. A. range B. Formula bar C. ...

**Microsoft word 201**

9. Andrea needs to format the legend on her chart. She clicks on the chart to select it. Which of the following options appears only when a chart is selected? A. Insert B. Review C. Chart Tools D. Page Layout

**all the above**

Dancers from the movie Rize continue to spread their inspirational message of hope to Los Angeles’ South Central youth. How should the sentence above be rewritten to correct the subject-verb agreement error? The sentence is correct as written. Dancers from the movie Rize...

**English**

had so much homework but thought the weekend would be so boring but went to a homework party

**Math**

thanks next time i'll show my work. you've been a big help.

**Math**

simplify the expression (the 7th root of 11x/y^6)(the 7th root of y^6/11x^8) the root is over the whole fraction in both cases. I've already done the problem once and got x(the 7th root of 1/x). which apparently this is wrong.

**Math**

How do I do this _______ is 32% of 250

**Language Arts**

Lisa, are you going to the party tonight

**psy 303**

. ___________ provided the first physiological explanations for mental illness. (Points : 1) Pinel Plato Galen Hippocrates

**algebra**

+write an expession for the volume of a rectangular prism if the length is 2 feet longer than some x amount the width is 6 feet longer than x and the height is x feet

**english**

The average height of members of the high school basketball team is six feet, three inches. Jerry is on the high school basketball team, so Jerry must be taller than six feet. The argument above is flawed because it confuses

**PSY 303**

This theory of psychology proposes that dysfunction begins in infancy, and emphasizes the importance of unconditional positive regard as a vehicle for becoming constructive and productive adults

**Psy 303 abnornmal Psychology**

The __________ phase of schizophrenia precedes the disorder and is marked by deterioration from some higher level of functioning. (Points : 1) premorbid active prodromal residual

**algebra**

When my answer is 4=x and I rewrite it as x=4, is that illustrating a property? Why am I able to do that?

**psy 303 abnormal psychology**

According to the textbook, _______% of women never experience an orgasm at all.

**geometry**

A street that is 155m long is covered in snow. City workers are using a snowplow to clear the street. The snowplow has tires that are 1.5m in diameter. How many times does a tire have to turn in traveling the length of the street? Use the value 3.14 for π . Round your ...

**tech school math**

I figured it out.... 63.3 - 52.3 = 11.0 msquared

**tech school math**

this is the answer to one of my questions. This is an on-line class. I don't know how they got the answer. I sent an email to the teacher but no response yet. 121pi/6 - 121 sqrt3/4 = 11.0 m squared

**science 207 lab wk 5**

1. Which water cycle processes are represented in this model and by what components? Answer = 2. Which water cycle processes are not represented? How could the model be altered to include each of these processes? Answer = 3. How would the “weather” be affected if ...

**ashford university**

1. Which water cycle processes are represented in this model and by what components? Answer = 2. Which water cycle processes are not represented? How could the model be altered to include each of these processes? Answer = 3. How would the “weather” be affected if ...

**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.

**algebra**

The diameter of the base of a cone is 5 ft, and the slant height is 7 ft

**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

**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?

**chemistry**

That is the Ksp I was given

**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?

**chemistry**

thanks I understand now

**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)

**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...

**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 ...

**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 ...

**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...

**Healthcare**

What is it

**English**

Setting Up Your Universal Remote Control Searching For Your Device Codes For example, to search for a code for your TV: 1. Turn on your TV. 2. On the remote control, press TV once; the button will blink once. Then press and hold SETUP until the TV key blinks twice, then ...

**Life orientation**

Corruption,bribery ,sabotage trap or fraud

**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, ...

**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 ...

**chemistry**

What is the resulting concentration when 250.0 mL of 0.65 M Magnesium Sulfate is added to 800.0 mL of water?

**Math**

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

**math**

555 / 3 = 185 Jason must sell 185 carrots.

**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 ...

**English**

nope^^

**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 ...

**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 ...

**English**

Christmas is around the corner... begin corner

**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 ...

**math**

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

**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...

**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.

**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 ...

**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?

**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...

**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?

**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...

**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 ...

**Algebra**

either

**Algebra**

13 1/3 divided by 22 1/2

**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 ...

**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!

**personification**

On scary tree

**English**

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

**algebra**

One number is twice a second number. The sum of those numbers is 45. Find the numbers.

**math**

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

**MATHS**

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

**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

**algebra**

6/-1

**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.)

**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...

**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 ...

**SS**

I can't use this .

**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.

**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?

**L.A**

Abby it is B

**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?

**chemistry**

Thank you very much!

**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 ...

**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

**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

**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.

**Mat 116 - Algebra**

Simplify x^2*x^3*x^4

**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?

**college/education**

Why is if logical to write test items or assessments before producing instructional strategies