Sunday

February 19, 2017
Total # Posts: 47

**Chemistry (organic)**

You have a solution that contains 5.0 g of oxalic acid dissolved in 150 mL of water. This solution is placed in a separatory funnel, and then 100 mL of diethyl either is added to the separatory funnel and an extraction is performed (diethyl ether and water are immiscible). Use...

*March 3, 2015*

**Physics**

52 J. 62-10=52.

*February 10, 2015*

**chemistry**

Which sample has the most solute? Question 15 options: 200. mL of 0.200 M MgCl2 150. mL of 0.250 M MgCl2 100. mL of 0.300 M MgCl2 100. mL of 0.250 M MgCl2

*November 12, 2014*

**chemistry**

{V1} mL of 0.100 M HCl is placed in a {V2}.0 mL volumetric flask and water is added to bring the final volume up to 250.0 mL. What is the molarity of the dilute solution?

*November 12, 2014*

**chemistry**

How much CaCl2 (MM = 111.0 g/mol) would you weigh out to prepare 325. mL of 0.150. M CaCl2?

*November 12, 2014*

**chemistry**

23.9 g of CaCl2 (MM = 111.0 g/mol) is dissolved in enough water to make 300. mL of solution. What is the molarity of the solution?

*November 12, 2014*

**chemistry**

How many milliliters of 5.50 M HCl must be diluted to make 350. mL of a 0.500 M solution?

*November 10, 2014*

**chemistry**

.20625

*November 10, 2014*

**chemistry**

i'm still not getting the correct answer

*November 10, 2014*

**chemistry**

What mass of KCl (MM = 74.55 g/mol) is required to make 750 mL of a 0.275 M solution?

*November 10, 2014*

**chemistry**

The acceptable limit for nitrate, often found in well water in agricultural areas, is 10 ppm. If a water sample is found to contain 355 µg/L, determine the concentration in parts per million, ppm. Express your answer in decimal form rounded to the third decimal place. Do...

*November 10, 2014*

**chemistry**

Calculate the quantity of heat in calories absorbed when 131.01 g of water is heated from 21.1°C to 50.4°C. Enter your answer as a whole number (no decimal portion). Do not include units with your answer.

*November 10, 2014*

**Psychology**

17

*February 7, 2013*

**Algebra-help**

12. A train traveled at a constant speed for 6 hours. The train traveled 225 miles in those 6 hours. What was the speed, in miles per hour, of the train? answer: 37.5 Is that correct? Thank You

*February 1, 2013*

**Algebra**

Thank you...I should have figured that out...

*February 1, 2013*

**Algebra-help**

9. Name all of the following numbers that are irrational. 2/3,√8,√144,5.2,0.(87) ̅,π I think it's just pi. Is that correct? Thank You

*February 1, 2013*

**Algebra-help**

Thank you so much Ms.Sue - just couldn't quite get it right...

*February 1, 2013*

**Spanish (Please Help)**

Is there?

*January 24, 2013*

**Spanish (Please Help)**

I asked Laura. Thanks anyway.

*January 24, 2013*

**Spanish (Please Help)**

I didn't ask you.

*January 24, 2013*

**Spanish (Please Help)**

Is there a way to get ahold of you for help?

*January 24, 2013*

**Spanish (Please Help)**

Are you alwas on here to answers questions?

*January 24, 2013*

**Spanish (Please Help)**

Thank You! Your sure these are right?

*January 24, 2013*

**Spanish (Please Help)**

4. Responde la pregunta. ¿Qué haces los lunes a las diez de la mañana? A.) Hago estudio. B.) Hago escribo. C.)Escucho a la maestra. D.)Hago miro la televisión. 5. Responde la pregunta. ¿Qué hacen Uds. los sábados por la noche? A...

*January 24, 2013*

**Spanish (Please Help)**

Thank you. will You anser 2 more? please.

*January 24, 2013*

**Spanish (Please Help)**

1. Write the verb form for: yo/hacer. 2. Write the verb form for: ellos/hacer. 3. Write the verb form for: nosotros/hacer. I'm not sure, but I think these are the answers: 1.) Hago 2.) Hagan 3.) Hagamos Thnk You.

*January 24, 2013*

**Math**

Write a 4-digit number where the value of one digit is ten times more than the value of another.

*September 26, 2012*

**5th Grade Math**

How do you write decimals in word form?

*October 4, 2011*

**Fund. of Electronics**

What is the peak to peak Voltage across a 10 kilo ohm resistor that dissipates 50 mW?

*July 22, 2011*

**4th grade math**

45/90=1/2=0.5

*April 5, 2011*

**MATH**

Hi Mariela, could you please tell me how you got $6.30. Explanation above still added over $6.30, I'm confused. Thanks

*January 26, 2010*

**MATH**

24 1c coins are set out in a row on a table. Then every 2nd coin is replaced by a 2c coin every 3rd coin is replaced by a 5c coin every 4th coin is replaced by a 10c coin every 5th coin is replaced by a 20c coin every 6th coin is replaced by a 50c coin every 7th coin is ...

*January 26, 2010*

**pre-algebra**

Which is the better buy: Brand A with a regular price of $15.98and a 30% discount or Brand B with a regular price of $18.50and a 40% discount -thanks

*November 19, 2009*

**MATHS**

Sorry I fogot to mention that this is a multiple choice question. Please see options below a) 1344 kg b) 2434 kg c) 3188 kg d) 3524 kg could you tell me how to get 2098?

*October 20, 2009*

**MATHS**

A truck carries newspapers. When it is half full of newspapers the truck has a mass of 1762kg. When it is a quarter full the truck has a mass of 1426 kg. What is the mass of the truck when it is full of newspapers? Thanks

*October 20, 2009*

**maths**

1) If I number the pages os a 36 page book, how many digits do I write? My answers is 63, not sure if this is the correct answer? 2) How many pages does a book have if in numbering them I use: a) 129 digits? A= 69 pages? b) 203 digits? A= 104 pages? Could you please check my ...

*October 20, 2009*

**MATHS**

Could you please explain the question below? In the Logan family, each daughterhas the same number of sisters as she has brothers. The daughters, incidentally, are all older than the sons. How many sons and how many daughters in the Logan family? Thank you.

*September 17, 2009*

**MATHS**

Could you please help? The Christmas tree store has a parking lot that will hold 1000 vehicles. 2/5 of the parking spaces are for cars. When you went to buy your tree, there were 200 cars and some trucks in the parking lot. The parking lot was 3/4 full. How many trucks were in...

*September 13, 2009*

**MATHS**

The recipe for mint chocolate ice cream requires 2 1/4 cups of creams for 5 people. You need ice cream for 8 people. How much cream will you need? Please explain,thanks.

*September 13, 2009*

**MATHS**

Please help with these maths questions 1) From a ribbon of lenghth 2 2/7m, I used 4/7m to wrap a box and 1 5/7m to tie a bow. How many metres of ribbon did I used? 2) Sammy's water tank contained 7 2/5 L of water in the morning. By the end of the day, there was 1 4/5 left...

*September 8, 2009*

**maths**

Could you please help? Thank you. Karen goes to the fruit shop and buys brocoli and carrots. She paid twice as much for the brocoli as the carrots even though she got half the weight. If the total bill was $4.50 and the carrots were 50 cents a kilo how much per kilo did she ...

*July 28, 2009*

**MATHS**

Could you please explain how to do this question? Thank you very much. Gustav is an untidy man who keeps all his socks loose in his drawer. He has 6 pairs of white socks, 4 pairs of green socks and 5 pairs of black socks. What is the most number of socks Gustav will have to ...

*July 26, 2009*

**4th grade**

Insert the missing letter. C -> F; D -> H; G -> N; H .? ; I -> R A O B P C Q D R Could you please help?

*June 30, 2009*

**maths**

Please help me answer this problem, sorry I cannot draw the shapes mentioned below Q. Add one or more lines to make these shapes rigid. 1) square 2) rectangle 3) issoceles 4) pentagon 5) trapezium 6) octagon Thank you very much.

*March 16, 2009*

**WRITING**

Could you please correct my essay? The magic carpet Once very hot day, I was looking for my criket bat down in the basement. I saw a beautiful colourful carpet was lying in the coner of the room as I came closer suddenly the carpet jumped! It moved and flied off into the air ...

*March 1, 2009*

**math**

Farmer joe had 3 animals, he wanted to weight Lucy, Nancy and Sue. He only had a scale that started with 100kg. Now, as heavy as those animals were, none of them exceeded 100kg.so he weighted them in pairs. Lucy and Nancy weight 132 kg together and Sue and Lucy weight 137 kg ...

*October 23, 2006*

**Minimum Wage**

Hey i have a question i need to write an essay on the Minimum wage and whether or not i believe that the federal government should have an ethical responsibility to protect the interests of minium wage workers? Do you agree or disagree? Why? i think that they should but i am ...

*July 23, 2005*

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