Tuesday

February 21, 2017
Total # Posts: 503

**Chem!**

Compound Odor Boiling Point, °C Flammability Ammonia Yes -33.3 Yes Methyl vinyl ether Slight 12.0 Yes Methyl chloride Yes -33.9 Yes Sulfur dioxide Yes -10.0 No Ethynyl bromide Yes 4.7 Yes Freon 134a No -26.1 No Carbon dioxide No -28.9 No Good refrigerants are compounds ...

*February 8, 2017*

**Chem **

The sodium sulfite-acid solution should be disposed of by ____________________. Question 5 options: 1) placing it in a designated waste container inside the fume hood. 2) reacting it with potassium permanganate before placing in a designated container inside the fume hood. 3) ...

*February 8, 2017*

**Chem**

When sulfur dioxide is bubbled through a solution containing bromothymol blue, the solution changes from blue to yellow because sulfur dioxide _______________________.

*February 7, 2017*

**Math**

3+1/4*cos(theta)=13/4 Please help really confused. I was given the answer as 1 but how do I figure it out. I know you are suppose to subtract 3 from both sides but how do i do that with the 13/4?

*January 24, 2017*

**Language Arts**

18. Identify the term that correctly identifies the sentence. After all, I have always been a night owl, and I prefer moonlight to sunlight. A. Simple Sentence. B. Compound Sentence. C. Complex Sentence. D. Compound-Complex Sentence.*** 19. Identify the underlined part of the ...

*December 6, 2016*

**Technology**

In microsoft excel graphs are referred to as what? A. Sparklines B.ilustrations C.tables D.charts

*November 28, 2016*

**science**

if you see lightning and then 3 seconds later you here the thunder how many yards are you from the lightning are you

*October 21, 2016*

**Math**

William answered 27 out of the 36 questions on his science test. What precent of the test did William answer?

*October 11, 2016*

**Algebra**

14+(d/4)=17 -14 -14 (d/4)=3 4(d/4)=3(4) d=12

*September 7, 2016*

**American Government**

It's A, not D.

*September 4, 2016*

**math**

Patrick recorded the daily changes of the value of stock in dollars: -3.40, -8.09, -2.47, 1.86, and 3. 55. What was the average daily change in the stocks value in dollars. I got 1.71 but I think it might be wrong.

*September 3, 2016*

**math**

I believe they gained 4. Not sure

*September 3, 2016*

**math**

If football team loses 3 yards, gains 12 yards, gains 10 yards, and then loses 15 yards. Did the team gain or lose yards overall? How many yards? Show your work

*September 3, 2016*

**American government**

Wow shes such a jerk!!! She didn't have to be so smart about it!

*August 23, 2016*

**ela please help me**

nope zackary is right one hundred percent if you go to connections

*May 15, 2016*

**math**

Bill takes a lot of $9,000 and an 8% simple interest rate for 6 years How much interest will Bill pay after 2 years? How much interest will he pay in total for the loan ? $720.00;3,600.00 $1,408.00;4,224.00* $36,000.00;12,000.00 $1,440.00;$4,320.00 Plz check answer

*March 24, 2016*

**Math**

Liz has 50 ft of fence to put around rectangle garden. Her garden is going to be 10 feet eide. How long will the garden be

*March 21, 2016*

**Math**

Nevermind, sorry I figured it out. 40x + 10(1.5x)=660 40x + 15x=660 55x=660 Then divide both by 55 to get x by itself and the answer which is 12. So the hourly rate is $12.

*March 14, 2016*

**Math**

Alice earns 1.5 times her hourly rate for each hour she works after 40 hours in a week. She worked 50 hours this week and earned $660. What is her normal hourly rate? I know her average rate is $13.20, but I know that's not what I need to find and I don'tunderstand how...

*March 14, 2016*

**math**

Alvin ate 5/8 of a pizza, if there were 16 slices of pizza. how many slices did Alvin eat?

*February 25, 2016*

**Math**

it should be 90. sorry bout that

*February 24, 2016*

**Math**

Thank you! Are my other answers correct?

*February 24, 2016*

**Math**

WRITE THE EQUATIONS: 1) Twice a umber added to four 4 is 28 MY ANSWER: 4 + 2n = 28 2) a number subtracted from 9 is three times that number MY ANSWER: 90 - n = 3n 3) The sum of two numbers is 180. One number is five times the other. (NEED HELP W/ THIS ONE)

*February 24, 2016*

**Algebra 1**

i need that answer to

*January 13, 2016*

**Chemistry**

12.4 g * (1 mol / 28.05 molar mass of C2H4) * (6.022*10^23 Avagadro's constant) / 1 mol = 2.662 * 10^23 mol

*December 5, 2015*

**Math**

A lift ticket at Tamarac cost $37 mom said she will by 75% of your ticket and you have to pay the rest what do you have to pay

*December 2, 2015*

**English**

In which sentence is the underlined verb passive? A. Mike and Kim are riding horses. B. Mike will ride a horse at the ranch tomorrow. C. The horse will be ridden by Kim. D. Kim had ridden a horse before.

*November 30, 2015*

**6th grade Math**

30.26/89 I got the first part which gives me -267, but then I'm confused because I don't know where to borrow from, please help, thank you!

*November 4, 2015*

**finite**

Urn A contains four white balls and five black balls. Urn B contains seven white balls and six black balls. A ball is drawn from Urn A and then transferred to Urn B. A ball is then drawn from Urn B. What is the probability that the transferred ball was black given that the ...

*October 27, 2015*

**Physics**

A ball is thrown vertically and reaches a height of 25m. What was it's initial velocity?

*October 23, 2015*

**Physics**

A ball is released and allowed to fall freely. How far will it have fallen in 2 seconds?

*October 23, 2015*

**Physics**

A ball is thrown vertically into the air with a velocity of 10ms to the negative 1 power. What will its displacement be after 1.5 seconds?

*October 23, 2015*

**Physics 101**

Calculate the increase in length of a 250.00 meter long concrete bridge if it's temperature increases from 10.0°C to 39.0 °C? The coefficient of expansion of concrete is 9.8 X 10^-6 (1/°C)

*October 20, 2015*

**Physics 101**

Calculate the increase in length of a 250.00 meter long concrete bridge if it's temperature increases from 10.0°C to 39.0 °C? The coefficient of expansion of concrete is 9.8 X 10^-6 (1/°C)

*October 20, 2015*

**Physics 101 help (dumb it down please)**

A 12,000 kg truck moving to the right at 22 m/s collides with and sticks to a 1200 kg car moving to the right at 16 m/s. What speed do the two vehicles move after the collision in what direction Also Calculate the Kinetic energy converted to heat sound and instructive work in ...

*October 20, 2015*

**Physics 101 (I'm stupid)!**

And Astronaut wearing an environment suit has a total mass of 130 kg. What is his weight on earth? What would his weight be on Mars where the acceleration of gravity is 3.26? What is his mass on Mars? Why? If he should end up adrift and deep space what what his mask be? Why?

*October 20, 2015*

**Physics 101 (I'm stupid)!**

And Astronaut wearing an environment suit has a total mass of 130 kg. What is his weight on earth? What would his weight be on Mars where the acceleration of gravity is 3.26? What is his mass on Mars? Why? If he should end up adrift and deep space what what his mask be? Why?

*October 19, 2015*

**Physics 101**

Calculate the increase in length of a 250.00 meter Long concrete bridge if its temperature increases from 10.0°C to 39.0°C? The coefficient of expansion of concrete is 9.8 X 10^-6 (1/°C)

*October 19, 2015*

**modern geometry**

Construct the locus of all points (in one half plane) from which the given segment (that you draw) is seen by: a. 120 degrees b. 105 degree I've tried following steps in my textbook but I'm struggling.

*October 12, 2015*

**Physics**

Dave needs to get groceries from the store, which is a distance of 1.7 km east of his house. Dave rides his bike to the store at a constant speed of 6.6 m/s, and rides back to his house at the slower speed of 2m/s. A)How long in seconds does it take Dave to reach the store? B)...

*September 15, 2015*

**Physics**

The North American and European continents are moving apart at a rate of about 3.0 cm/yr. At this rate how many years will it take them to drift 500.0 km farther apart than they are present?

*September 14, 2015*

**physics**

It takes the same amount of time to fall as it does to rise. Example: if you toss a ball in the air and catch it at the same height 10s late, the speed of the max height would be 5s. It takes 10 m/s total, so going up would be 5s and coming down would be 5s. Hope that helps. I...

*September 14, 2015*

**Algebra 2 geometry**

Pallelogram ABCD AB= 2x-y CD=7 BC= x+y AD=2 find x & y

*August 23, 2015*

**Math**

(2y-3)(3y-2) A. 6y2-13y+6 B. 6y2-13y-6 C. 6y2+13y-6 * D. 6y2+13y+6 *my answer (btw the 2 next to 6y is an exponent) I think that it is C, but I want to be sure that it is correct.

*May 29, 2015*

**Chemistry**

A 1.76g sample of quinone, C6H4O2, is burned in a calorimeter whose total heat capacity is 7.854 kJ/C. The temperature of the calorimeter increases from 23.44 C to 29.14 C. What is the heat of combustion per mole of quinone? The molar mass of quinone is 108.1 g/mol. The answer...

*May 20, 2015*

**statistics**

A sample of 65 night-school students' ages is obtained in order to estimate the mean age of night-school students. x bar = 25.2 years. The population variance is 28. (a) Give a point estimate for ì. (Give your answer correct to one decimal place.) Correct: Your ...

*May 14, 2015*

**Math**

Ok, thanks so much for the help! =)

*May 11, 2015*

**Math**

What is the equation of the line that passes through the point (-2,3) and that is perpendicular to the line represented by 3x-2y=-2? A. 2x+3y=5 B. 2x+3y=7 C. -2x=3y=5 D. 3x-2y=-12 I think that the answer is D, but I am not too sure about it.

*May 11, 2015*

**chemistry**

How many grams of CuSO4 . 5H2O are needed to prepare 100ml of a 0.10M solution? Remember to change the given volume to liters and take the moles and convert them to grams via the molar mass to get grams of CuSO4 . 5H2O

*April 20, 2015*

**Chemistry**

In a chain mechanism, a reaction in which two free radicals combine to form a stable molecule would be called the A) initiation step B) termination step C) propagation step D) inhibition step E) branching step

*April 7, 2015*

**Chemistry**

If the reaction 2NO + 2H2 --> N2 + 2H2O occurred in just a single step, the overall order of the reaction would be A) 1 B) 2 C) 3 D) 4 E) 5

*April 7, 2015*

**Chemistry**

Concentration of KCl is 0.04 M and NaCl is 0.06 M

*April 7, 2015*

**Chemistry**

What would the answer be to the second part? Explain why the solubility of KHTar in the mixed KCl- NaCl solution differs from that in 0.100 M NaCl

*April 7, 2015*

**Chemistry**

It was a solubility lab for KHTar

*April 7, 2015*

**Chemistry**

As the concentration of KCl in a solution increases, the solubility of KHTar ______________ because ___________________

*April 7, 2015*

**Chemistry**

Explain why the solubility of KHTar in 0.100 M NaCl solution differs from that in pure water? Explain why the solubility of KHTar in the mixed KCL - NaCl solution differs from that in the 0.100 M NaCl.

*April 7, 2015*

**social studies**

Deven was right

*March 2, 2015*

**History**

Thank you :)

*February 20, 2015*

**6th grades math**

Alyssa's shelves hold 31 books each. How many shelves will Alyssa need if Alyssa has 248 books?

*February 8, 2015*

**Math**

I got 555 mph but I don't know if it's correct

*January 20, 2015*

**Math**

Two trains are traveling opposite directions. One train travels at a speed of 90 mph. The second train travels at a speed of 95 mph. The 2 trains travel for three hours. How far apart are the 2 trains?

*January 20, 2015*

**Math**

This regular octagon has a side length 15.0cm. Determine the distance from one vertex to the opposite vertex, measured through the centre of the octagon. Give your answer to to the nearest tenth of a centimeter.

*January 15, 2015*

**Algebra 1**

The answer is 4

*December 7, 2014*

**physics**

Elephants communicate via infrasound, at frequencies as low as 11 Hz that can travel up to 9 km. The intensity of these sounds can reach 106 dB, measured a distance of 4 m from the source. a) Determine the intensity level in W/m2 of the infrasound at 4 m from the source. b) ...

*December 1, 2014*

**physics**

Assume that there is no friction between m2 and the incline, that m2 = 1.8 kg, m1 = 1.4 kg, the radius of the pulley is 0.10 m, the moment of inertia of the pulley is 3.6 kg m2, and θ = 27.0°. Mass 1 is hanging vertically while mass 2 is on the incline. After mass 2 ...

*November 29, 2014*

**chemistry**

In a constant-pressure calorimeter, 55.0 mL of 0.310 M Ba(OH)2 was added to 55.0 mL of 0.620 M HCl. The reaction caused the temperature of the solution to rise from 22.23 °C to 26.45 °C. If the solution has the same density and specific heat as water, what is ΔH ...

*November 19, 2014*

**English**

What are the answers for chapter 9? Final Check: Money Problems

*November 18, 2014*

**Science 8A Check Answers**

Thank you.

*November 17, 2014*

**Science 8A Check Answers**

Will someone please check my answers as I need lots of help in science. 1. Which of the following is an example of matter? A. leaves B. shadow C. light from the sun* D. sound 2. Which of the following is an example of a chemical property of matter? A. ability to melt B. ...

*November 17, 2014*

**Science Help!**

Just help people and even if they are looking for all the answer on this website. Still help them and also explain why its the answer so they just don't get the answer without explanation

*November 14, 2014*

**chemistry**

Which of the following reactions have a positive ÄSrxn? Check all that apply. A(g) + B(g)--> C(g) 2A(g) + B(g)--> 4C(g) A(s) + B(g)--> 2C(g) 2A(g) + 2B(g)--> 3C(g)

*November 2, 2014*

**Chemistry**

Which of the following reactions have a positive ÄSrxn? Check all that apply. A(g) + B(g)--> C(g) 2A(g) + B(g)--> 4C(g) A(s) + B(g)--> 2C(g) 2A(g) + 2B(g)--> 3C(g)

*November 2, 2014*

**chemistry**

Which of the following reactions have a positive ÄSrxn? Check all that apply. A(g) + B(g)--> C(g) 2A(g) + B(g)--> 4C(g) A(s) + B(g)--> 2C(g) 2A(g) + 2B(g)--> 3C(g)

*November 2, 2014*

**math**

A pair of blocks of the mass M =30.7 kg, and 2 M are dragged over a rough, horizontal surface by two constant forces of magnitude F=98.0 N. The angle α = 22.7 ° . The blocks are displaced 7.5 m, and the coefficient of kinetic friction is 0.258. *for the normal force ...

*October 15, 2014*

**Physics**

A pair of blocks of the mass M =30.7 kg, and 2 M are dragged over a rough, horizontal surface by two constant forces of magnitude F=98.0 N. The angle α = 22.7 ° . The blocks are displaced 7.5 m, and the coefficient of kinetic friction is 0.258. *for the normal force ...

*October 15, 2014*

**Help: Social Studies (Please check my answers)**

I got 100% the real answers are 1=d 2=c 3=a 4=c 5=c

*October 14, 2014*

**Physics**

A bush baby, an African primate, is capable of leaping vertically to the remarkable height of 2.3 m. To jump this high, the bush baby accelerates over a distance of 0.14m while extending the legs. The acceleration during the jump is approximately constant. What is the ...

*October 10, 2014*

**physics**

Heather and Jerry are standing on a bridge 53m above a river. Heather throws a rock straight down with a speed of 12m/s . Jerry, at exactly the same instant of time, throws a rock straight up with the same speed. Ignore air resistance. How much time elapses between the first ...

*October 9, 2014*

**chemistry**

A solution of silver perchlorate (AgClO4) is made by dissolving 40.4 g of pure silver perchlorate and diluting it to exactly 140 ml. What is the solutions molarity? Can you just go through the steps of what I need to do? I'm so confused. Thanks

*October 8, 2014*

**Advanced Math**

I got they curl up in... I cant figure out the last word but the letters are D, E, and Y

*September 14, 2014*

**math**

Tina and Jim live 5 miles apart from each other. Tina ran from her house to Jim's house at a rate of 10 miles per hour. Jim ran from his house to Tina's house at a rate of 8 miles per hour. How far had Jim run by the time he crossed paths with Tina?

*September 9, 2014*

**math**

At a construction site, 20,000 pounds of gravel are needed to create a driveway with an area of 400 ft2. What area of driveway can be added with another 125 pounds of gravel? 25.5 ft2 312 ft2 160 ft2 2.5 ft2 5 ft2

*September 5, 2014*

**biology**

how does sugar affect anthocynins?

*September 5, 2014*

**biology**

how does light affect anthocyanins?

*September 5, 2014*

**algebra**

If 50 tickets to the concert cost a company $1,649.50, what do 4 tickets cost? A. $164.95 B. $32.99 C. $65.98 D. $98.97 E. $131.96

*September 5, 2014*

**PRINCIPLES OF PUBLIC SPEAKING PART II, SECTION 2**

Eye contact

*September 4, 2014*

**Math**

In this case. Would you use sinA/a=sinB/b=sinC/c

*August 27, 2014*

**Math**

How do you know that?

*August 27, 2014*

**Math**

The three angles of a triangle are 105°,25°,50° . In what ratios are the sides?

*August 27, 2014*

**Math**

What do you do next?

*August 27, 2014*

**Math**

The three angles of a triangle are 105°,25°,50° . In what ratios are the sides?

*August 27, 2014*

**math**

A $15,000 debt is to be amortized in 12 equal semiannual payments at an annual interest rate of 11% on the unpaid balance. Construct an amortization table to determine the unpaid balance after two payments have been made.

*June 26, 2014*

**Algebra 1**

y=-x+10

*June 1, 2014*

**health**

With bone-strengthening activities, your feet, legs, or arms support your body's weight, and your muscles push against your bones. This helps make your bones strong. Running, walking, jumping rope, and lifting weights are examples of bone-strengthening activities.

*May 21, 2014*

**Science (A&P)**

Trace the path of food from the mouth to the large intestine and what occurs at each structure. Anything would be helpful because I am having trouble finding the answer.

*May 21, 2014*

**Science**

When a cell is infected with a virus, what is produced for future protection? i thought it was good bacteria but i don't think a cell can do that. So confused.

*May 21, 2014*

**Algebra 2**

That is 300 degrees so (1/2,square root 3/2). The cosine is (1/2). For exact value, (5 pie/3) times (180/pie). Cross multiply. Hope that helps!

*May 21, 2014*

**Algebra**

How do you find the excluded value if there is another variable or number in the denominator? Such as the equation 12(a) over a squared minus 3(a) minus 10?

*May 19, 2014*

**chemisty**

how many joules of energy are needed to change 275 g of water from 15 degrees C to steam at 100 degrees C?

*May 13, 2014*

**Social Studies! CHECK!**

What do you think the answers are?

*May 6, 2014*