Saturday

October 10, 2015
Total # Posts: 4,444

**Organic Chemisty**

Calculate the number of mg of caffeine you would extract in each case, 2-10ml extractions vs 1-20ml extraction. The KD value in this case is 4.6 (assume a starting value of 100mg)
*October 7, 2015*

**Math**

Sixty people can receive a piece of pizza, if there is 5 pizzas purchased.How many people can receive a slice of pizza if 7 pizzas are purchased?
*October 7, 2015*

**chemistry **

In a chemistry experiment, a student measures the density of iridium (Ir) metal as 21.52 g/cm3. The actual density of Ir metal is 22.65 g/cm3. What is the percent error of the student's measurement?
*October 6, 2015*

**MS SUE PLEASE HELP LANGUAGE ARTS**

I think its C or B am I right?
*October 2, 2015*

**History**

True or False: English common law is based on the orders of the king. False?? Which of the following statements about the American Revolution is true? It inspired the people of France and people of other nations to start their own democratic revolutions. <---? It sparked a ...
*October 2, 2015*

**Statistics**

Types of bonds are divided into three categories: good risk, medium risk, and poor risk. Assume that of a total of 13,838 bonds, 7,035 are good risk, 1,388 are medium risk, and the rest are poor risk. One bond is chosen risk? Write only a number as your answer. Round to two ...
*October 2, 2015*

**Statistics**

At a local university, when scheduling classes, the probability that there are no evening classes available on a certain day is 0.80. what is that probability that there is at least one evening class available on that day? Write one a number as your answer. Round to two ...
*October 2, 2015*

**Statistics**

The Probability that a randomly selected commuter listens to audiobooks during their commute is 0.49. Suppose that a sample of 10 commuters is selected, what is the probability that at most 3 of them listen to audiobooks? Write only a number as your answer. Round to 2 decimal ...
*October 2, 2015*

**Statistics**

At a car rental agency, 0.34 of the cars are returned on time. A sample of 13 car rentals is studied. What is the probability that more than 3 of them are returned on time? Write only a number as your answer. Round to 2 decimal places ( for example: 0.24). Do not write as a ...
*October 2, 2015*

**Statistics**

In a certain class 27% of the students are left-handed. suppose that a random sample of 53 students is selected. Find the mean number of left-handed students in the class. Round your answer to the nearest integer. Pls help!
*October 1, 2015*

**Half-Life**

The rate constant for this first-order reaction is 0.0990 s–1 at 400 °C. A --> products After how many seconds will 10.0% of the reactant remain?
*September 22, 2015*

**Pre-Calc**

An airplane is flying at a speed of 250 mph at an altitude of 4 miles. The plane passes directly above a radar station at time t = 0. What is the distance s between the plane and the radar station after four minutes?
*September 20, 2015*

**Laurens high**

if Sam have $60 to buy cars withand the cars are 4 for $5 how much how many cards can she get
*September 17, 2015*

**Physics**

You are an explorer on a tiny planet with no atmosphere. You drop a coffee filter and find that it falls 2.0m in 1.6s. As you were approaching the planet, you measured the radius to be 1.8x10^6 m. What is the mass of the planet? So I used the 2.0m and 1.6s to figure out the ...
*September 15, 2015*

**Rocky heights**

How do I write .000006 in words
*September 14, 2015*

**FRENCH!!! **

I replied to Sra Mme to my french story yesterday. I need help because I tried correcting my sentences.
*September 10, 2015*

**MATH**

11.) A company produces a product for which the variable cost is $12.30 per unit and the fixed costs are $98,000. The product sells for $17.98. Let x be the number of units produced and sold. a.) the total cost for a business is th sum of the variable cost and the fixed costs...
*September 10, 2015*

**FRENCH**

#14 - Is this right?? Je ne aurait regretterais jamais mon voyagé. I am trying to say, "I would never regret my traveling.)
*September 9, 2015*

**FRENCH**

10.) I was trying to say "There was constant movement." (to make it simpler, there's my sentence) "There was constant movement." How do I say that??
*September 9, 2015*

**FRENCH**

For #9. I was trying to say "Le Royal Botanic Gardens a été absolument respirons prend. " (The Royal Botanic Gardens is absolutely breathe taking) I wasn't sure how to write that???
*September 9, 2015*

**FRENCH**

For #8.) 8.) Il y avait un port charmant avec un l'imposant massif arqué Harbour Bridge et estimé Royal Botanic Gardens à proximité par que je suis allé. (I want to say, "There was a Darling Harbour with an impressive arched solid ...
*September 9, 2015*

**FRENCH? HELP!!! **

I only put parentheses to show you those are a must to include in my paragraph. 1.) Le 10 août, 2015, je devais emballer mon suitcase- faire les valises. 2.) Je suis allée à l'aéroport et j'ai attendu en ligne pour faire la file d'attente...
*September 9, 2015*

**Chemistry 2 **

36.) Suppose a chemistry student discoveres that a block of pure ice is left on her porch as she goes to school one day. What will be the percent composition of the pure ice block?
*September 9, 2015*

**Chemistry2**

12.) Chlorine reacts with potassium bromide to produce potassium chloride and bromine. a.) write a chemical equation, using words, to represent the above chemical reaction. Answer: Chlorine + potassium bromide ==> potassium chloride + bromine (Is this correct?) b) Suppose 4...
*September 9, 2015*

**Chemistry2**

A student pours 200 grams of methanol, a flammable substance into the sink. Another student causes the bad situation to get evern worse by dropping a lit match into the sink. The methanol burns completely with 300 grams of oxygen from the air. What mass, in grams, is converted...
*September 9, 2015*

**math**

Bill can mow his mother's lawn in 45 minutes. His brother Jim can mow it in 65 minutes. How long will it take them to do it together, if each has his own lawnmower? (Record your answer in minutes rounded to one decimal place. For example, if the answer you find is 14.2835 ...
*September 9, 2015*

**Coding**

How do you open cmd? Thanks
*September 8, 2015*

**problem solving with fractions**

mr. rosen needs to make 1 1/2 times as many pizza tonight as usual because he expects ta large crowd. if he usually makes 24 pizzas, how many pizzas should mr. rosen make?
*September 8, 2015*

**Chemistry **

when heated, sulfuric acid will decompose into sulfur trioxide and water. Write a chemical equation, using words, to represent this chemical reaction. Identify reactants and products. (I'm having trouble identifying the reactants and products & writing the chemical ...
*September 6, 2015*

**Chemistry**

What is the difference between a chemical change and a chemical reaction?? My answer: A chemical change leads to a solidifed chemical reaction but more or less they are the same thing because it's a change in which one or more pure substances are converted into diffeent ...
*September 6, 2015*

**Pre-Calculus**

1) j(x)=-2/3x what is j(x)'s y-intercept? answer: (0,0) 2) k(x)=4 what is k(x)'s slope? answer: 0 3) g(x)=2x-5 what are the root(s) of g(x)? 4) the slope of line p if p is perpendicular to line f are the answers i provided correct? and please help me on 3 and 4
*September 1, 2015*

**Maths**

In the diagram ab is a straight road and c indicate the bottom of a vertical clif in the same vertical plane as ab the angle of elevation to the top of the from a is 24 degres and from b 300m closer to the clif the angle ofg elevation is 38 degres.calculate the height of the clif
*September 1, 2015*

**Chemistry **

is concrete homogeneous or heterogeneous
*August 31, 2015*

**Math, trigonometry **

An observer in a lighthouse 47m high sights a ship at at an angle of depression of 4.25• if the the foot of the light house is at sea level how far is the ship from the foot of the lighthouse
*August 31, 2015*

**geometry**

If the length of the abdomen is 2.25 inches. The length of the thorax is 1.75 inches. The walking stick's abdomen is .5 inches longer than the thorax. It's abdomen is _____ time longer than its thorax.
*August 25, 2015*

**Math**

X=195
*August 24, 2015*

**Math**

Kendall knows that a 45 ounce pitcher can hold enough lemonade for 6 people at this rate how many ounces of lemonade will Kendall need to serve 26 people.
*August 24, 2015*

**maths**

If week 1 was the first week of 2014 (starting Saturday 4th January)), by when would you earn: a) $100 b) $500 c) $1000
*August 17, 2015*

**physics**

A 15.5-kg sled is being pulled across a horizontal surface at a constant velocity. The pulling force has a magnitude of 76.7 N and is directed at an angle of 27 ° above the horizontal. Determine the coefficient of kinetic friction.
*August 12, 2015*

**college chemistry**

A piece of wood is discovered in the Amazon with a 14C/12C that is 64.3% that of living organisms. How old is it? I have no clue how to do this please help.
*August 4, 2015*

**NURSING ASAP**

thankkk youuuu :)
*August 3, 2015*

**NURSING ASAP**

Is nursing considered a a science major because I'm taking this course called "CHEM 1001 Chemistry and the World Around Us?" and I studying nursing in college. Please be honest. Thank you! :)
*August 3, 2015*

**Math Important!**

Ozzie's Mother bought an assortment of greeting cards while she was at the bookstore. She bought twice as many birthday cards as anniversary cards. She bought 2 fewer anniversary cards than general greetings cards, but 2 more anniversary cards than get well cards. If she ...
*July 30, 2015*

**Math**

If a recipe calls for 2/3 cups of sugar but I only want to make 1/4 of the recipe, how much sugar do I need?
*July 22, 2015*

**chemistry**

A 8.75-L container holds a mixture of two gases at 23 °C. The partial pressures of gas A and gas B, respectively, are 0.317 atm and 0.755 atm. If 0.100 mol of a third gas is added with no change in volume or temperature, what will the total pressure become?
*July 20, 2015*

**physics**

nevermind. figured out that the "mass" of the blocks are actually the weight so i unnecessarily multiplied them by 9.8
*July 19, 2015*

**physics**

doing webwork when i came across this question. sure i had it right but apparently im not. The weightless horizontal bar in the figure below is in equilibrium. Scale B reads 4.20 kg (N.B. as you know, the scale should read N, but no one told the manufacturer). The distances in...
*July 19, 2015*

**English**

What rhetorical devices were used in Lester Pearsons address on the inauguration of the national flag? I have found an alloiteration in paragraph 4 "our new flag will fly for the first time" an antithesis in para 5 and an anaphora in para 13? Are these correct?
*July 16, 2015*

**Chemistry**

A sodium hydroxide sample is contaminated with sodium chloride. A 0.240 gram sample of this impure sample is dissolved in water and titrated with 21.50 mL of 0.130 M H2C2O4. Calculate the percent sadium hydroxide in the impure sample [(mass of NaOH in impure sample/mass of ...
*July 15, 2015*

**Chemistry**

What is the octet rule? How does the rule explain the common ion of fluorine and of calcium? The octet rule is when an element contains 8 valence electrons. The rule explains the common ions of fluorine and calcium to show how much is needed to gain/lose electrons to get that ...
*July 9, 2015*

**Physics**

You are watching your friend play hockey. In the course of the game, he strikes the puck in such a way that, when it is at its highest point, it just clears the surrounding 2.96 m high Plexiglas wall that is 14.5 m away. (Ignore any effects due to air resistance.) (a) Find the...
*July 5, 2015*

**physics**

A mass m = 9.0 kg is attached to the lower end of a massless string of length L = 83.0 cm. The upper end of the string is held fixed. Suppose that the mass moves in a circle at constant speed, and that the string makes an angle theta = 21 with the vertical, as shown in the ...
*July 3, 2015*

**Math**

Give the function that describes the sequence. x y 1 1 2 1 3 1 4 1 A. 1/2x B. x C. x exponent 1 D. x exponent 0
*June 26, 2015*

**Math**

If k = 2, which of the following is correct? A.(10k ÷ 2) + 4 ≤ 14 B.8k + 3 = 20 C.k - 13 > -10 D.9k + 15 ≤ 31
*June 26, 2015*

**Amplifiers**

A particular BJT has a base DC current of 1mA and a collector DC current of 10mA . What is the DC beta for this translator?
*June 23, 2015*

**Chemistry**

energy required for ionisation of 0.02 gram atom of magnesium is x Kj .the amount of energy required to ionise 1 atom of magnesium is
*June 5, 2015*

**Chemistry**

If 60% of a first order reaction was completed in 60 minutes, 50% of the same reaction would be completed in approximately
*May 29, 2015*

**CHEMISTRY**

CHEMICAL KINETICS The rate of reaction 2N₂O5->4NO₂+O₂ can be written in three ways -d[N₂O5]/dt= k[N₂O5] d[NO₂]/dt= k'[N₂O5] d[O₂]/dt =k"[N₂O5] The relationship between k and k' and between k and k" are ?
*May 28, 2015*

**criminal justice**

what are all the procedlural and substantive ways that a prosecutor and a defense attorney can resolve a case before it goes to a grand jury?
*May 25, 2015*

**Language**

Is there any way to add bias to this question? : "How many minutes did you spend doing homework last week?"
*May 24, 2015*

**Economics**

A Cobb-Douglas production function for new company is given by f(x,y) 50x 2 5 y 3 5 where x represents the units of labor and y represents the units of capital. Suppose units of Labor and capital cost $100 and $200 each respectively. If the budget ...
*May 24, 2015*

**finance**

You decide to buy a new home for $101000.00 at 7.5% interest rate. You feel that you can afford $800.00 for a mortgage payment. You make a down payment of $10000.00 How much will you still owe after making payments for one year. Show the mortgage payment schedule with the ...
*May 21, 2015*

**MATH**

HOW IS ONE WHOLE,ONE TENTH,AND ONE HUNDREDTH RELATED ?
*May 19, 2015*

**programming concepts**

i need the pseudocode if someone can help
*May 15, 2015*

**programming concepts**

i need the pseudocode if someone can help
*May 15, 2015*

**programming concepts**

Mr. Jones always gives True/False tests to his class. His tests always have 20 ques- tions. The maximum class size is 35. He needs a program that will calculate the stu- dents’ grades based on the best score. Grade A will range from the best score, to the best score minus...
*May 15, 2015*

**programming concepts**

Mr. Jones always gives True/False tests to his class. His tests always have 20 ques- tions. The maximum class size is 35. He needs a program that will calculate the stu- dents’ grades based on the best score. Grade A will range from the best score, to the best score minus...
*May 15, 2015*

**Math**

Ethan had $8 more than Dakota. Ethan then gave 1/4 of his money to Dakota. The ratio of money Ethan had to the money Dakota had then became 5:7. How much money did Ethan give to Dakota?
*May 15, 2015*

**History**

Thank you !!
*May 14, 2015*

**History **

What was the result of the overthrow of Diem in Vietnam?
*May 14, 2015*

**math**

a cylinder has 2 faces and no edges.
*May 14, 2015*

**History**

No, I wasn't planning on doing that at all haha thank you very much !
*May 14, 2015*

**History **

What caused the French to pull out of Vietnam?
*May 14, 2015*

**Math**

Kelly makes fruit juice each morning. She uses 2 1/3 pints of strawberries and 1 2/5 pints of grapes in her juice. If she doubles her recipe, how many more points of strawberries than pints of grapes will she use?
*May 13, 2015*

**physics**

In a police ballistics test, a 10.0-g bullet moving at 300 m/s is fired into a 1.00-kg block at rest. The bullet goes through the block almost instantaneously and emerges with 50.0% of its original speed. What is the speed of the block just after the bullet emerges
*May 13, 2015*

**Math**

HELP!!!
*May 13, 2015*

**Math**

2. A researcher tagged 40 giant turtles in 2008. In 2009 she returned and captured 50 turtles, 16 of which were tagged. in 2010 she returned again and captured 30 turtles 8 of which were tagged. a: Use a proportion to estimate the turtle population for 2009 b: Use a proportion...
*May 13, 2015*

**physics**

i did not get this . can u do little bit calculations too.
*May 13, 2015*

**physics**

a 4.0-kg block is moving at 5.0 m/s along a horizontal frictionless surface toward an ideal spring that is attached to a wall. After the block collides with the spring, the spring is compressed a maximum distance of 0.68 m. ) Suppose now friction is present and k = 0....
*May 13, 2015*

**Algebra ll**

i need help i have a polynomial f(x) whose coefficeint are real numbers. Find the remaining zeros of f. Degree 3, zeros -4,-2,-i
*May 11, 2015*

**phi 208**

Just War Theory asserts that military intervention
*May 9, 2015*

**Canadian History**

What were aboriginal peoples in Canada thinking and feeling about the nazi soviet pack in 1939? I can't find anything on it. I wanna know what the perspective of an at home aboriginal person was feeling towards the thought of another war? Please help.
*May 8, 2015*

**Chemistry**

Helium is collected over water at 20.°C and 1.16 atm total pressure. What total volume of gas must be collected to obtain 0.597 g of helium? (At 20.°C the vapor pressure of water is 17.5 torr.)
*May 5, 2015*

**Chemistry**

Determine the energy absorbed as two moles of Nitrosyl Chloride are disassociated into nitric oxide and chlorine gas (used bond energies of kJ per mole to determine your net energy released in Joules): 2NOC1(g)-->2NO(g)+C12
*April 28, 2015*

**Chemistry**

Determine the energy absorbed as two moles of Nitrosyl Chloride are disassociated into nitric oxide and chlorine gas (used bond energies of kJ per mole to determine your net energy released in Joules): 2NOC1(g)-->2NO(g)+C12
*April 28, 2015*

**CHemistry**

Given the following information calculate the heat of formation of C2H4. C2H4 + 3 O2 ¡æ 2 CO2 + 2 H2O ¥ÄH¡Æ = -414 kJ/mol C + O2 ¡æ CO2 ¥ÄH¡Æ = -393.5 kJ/mol H2 + ¨ö O2 ¡æ H2O ¥ÄH&...
*April 26, 2015*

**Science**

What are the four flight forces? Give a brief description of each.
*April 21, 2015*

**calc**

integral from 1 to x of (5/(t^3 +3))dt
*April 19, 2015*

**Science**

The current atomic model would be revised if a) better microscopes were being used to study its structure. b) better microscopes are invented in the future. c) new information about an atom's structure is discovered. d) a new element is discovered in the future.
*April 16, 2015*

**AP Chem**

Lead metal is added to a solution of hydrochloric acid. What would be the theoretical cell potential, E°, for the reaction?
*April 13, 2015*

**Applied Chemistry - HELP!**

Make a poster of types of product warning labels. I'm having a hard time looking up types of product warning labels. Please help and please do not just give me Google link to product label for me to look up by myself which I did but I .... having a hard time.
*April 7, 2015*

**History**

canada and around the time of the constitustion act i suppose to start
*April 3, 2015*

**History**

What were three tactics of assimilation used on aboriginals?
*April 3, 2015*

**Accounting**

Paid $1,200 cash to Hilldale Mall for Success Systems' share of mall advertising cost. I need to know the debit and credit.
*April 2, 2015*

**Accounting**

Completed a project for Chang Corporation abd received $3620 cash. I need to know the debit and credit. Thanks
*April 2, 2015*

**Algebra**

For f(x)=(3x^2)+5and g(x)=7x-2, a. Verify: g(x + 2) ≠ g(x) + g(2). b. Find (f – g)(x). c. Using the resulting function in (b), show that (f – g)(2) = f(2) – g(2). (The work should be different for each side of the equation.) d. Is (fg)(0) =(f/g)(0)? ...
*April 2, 2015*

**chemistry**

Calculate the molarity of a solution made by adding 47.2g of NaNO3 to a flask and dissolving it with water to create a total volume of 1.80L .
*April 1, 2015*

**physics**

A 2inch diameter pipe has been chosen to pass 65 GPM. Can this diameter be used for the suction line? If not , what line diameter should be specified?
*March 31, 2015*