Monday

October 20, 2014

October 20, 2014

Total # Posts: 1,001

**chemistry, please help!**

Given: 1. Mass of oxalic acid + weighing paper 2.0355g 2. Mass of weighing paper 0.5219 g 3.volume of oxalic acid solution 250 mL 5. Volume of oxalic acid used in titration trial 1: 15.o mL Trial 2: 15.0 mL 6. Volume of NaOH solution used in titration: Trial 1: 12.1 mL trial 2...
*May 2, 2011*

**chemistry**

To what volume must a solution of 83.1 g H2SO4 in 505.3 mL of solution be diluted to give a 0.28 M solution? I do not understand this problem. Also as a hint the professor said to use M1V1= M2V2.
*April 28, 2011*

**chemistry**

molarity = moles solute / L solution Convert g to moles: 23g NaCL x 1 mol/58.44 g NacL = 0.394 mol Convert ML to Liter: 500 mL x 1 L /1000 mL = 0.5 L Therefore... M= 0.394 mol/0.5L = 0.788 Molarity.. should be the right answer
*April 28, 2011*

**Please HELP CHEM**

How many grams of CaCl2 would be required to be added to water to prepare 1liter (1000ml) of a 1.72% (w/v) aqueous solution of CaCl2?
*April 28, 2011*

**Math**

Alright let friend one be represented by x, freind two by y and friend three by z. So 17feet 8 inches needs to be converted. Write out all that you know in algebra formulas. x+y+z= x= y= z= and solve. Or just use the first formula and solve for each value by inserting the ...
*April 24, 2011*

**Math calculus-Trig**

Find the area bounded by the curve and the lines y = -x^2 - 4x; y = 1; x = -3; x = 1
*April 21, 2011*

**Math**

Explain why the vertices of a solution region are important when using linear systems of inequalities for optimization problems ?
*April 20, 2011*

**Math**

A round 12-inch woofer is mounted to the bottom of a rectangular speaker enclosure with an inner width measurement of 12 inches. How far from corner A is the center, O, of the woofer?
*April 20, 2011*

**world history**

neanderthals lived near homo sapians for thousands of years
*April 14, 2011*

**algebra**

What is the distibutive property to multiply using this equation? 12(u+v)
*April 8, 2011*

**algebra**

5/16 + 3/24
*April 7, 2011*

**chemistry**

In calibrating a thermometer by setting only the freezing and boiling points, what assumptions are you making regarding the internal diameter of the thermometer and the expansion of alcohol?
*April 6, 2011*

**chemistry**

In calibrating a thermometer by setting only the freezing and boiling points, what assumptions are you making regarding the internal diameter of the thermometer and the expansion of alcohol?
*April 6, 2011*

**statistics**

Is it ever inappropriate to report the mean? If so, when?
*April 4, 2011*

**math**

find mass of 2.7 grams of aluminum if volume is 1 cubic meters
*April 1, 2011*

**math**

find mass of 2.7 grams of aluminum if mass is 1 cubic meters
*April 1, 2011*

**ENG 121**

what are some examples of similarities and differeces in working mothers vs stay at home mothers?
*March 31, 2011*

**marketing**

discuss the legal and ethical implications that could affect the marketing process with nutrition life cycle of school age children
*March 29, 2011*

**Math**

Sketch the graph of a function f that satisfies all the following conditions. (a) f(0)=0,f'=1 (b) f''(x)>0 for x<0, f''<0 for x>0
*March 28, 2011*

**Math**

Find the vertical and horizontal asymtotes of y=1/x^2+6x+9
*March 28, 2011*

**Math ( calculas)**

find the intervals on which the curve y=x/(x+1)^2 is concave upward or concave downward.
*March 27, 2011*

**Math**

Rchel has 14 red, 9 blue, and one yellow towel. In haw many ways can the towels be arranged if the towels of the same colour must be side by side?
*March 23, 2011*

**chemistry**

The electron in a hydrogen atom is excited and makes a transition from n=2 to n=7 a. calculate the energy of the photon absorbed in joules. b. calculate the wavelength of the photon in meters HOW DO I DO THIS?
*March 21, 2011*

**Chem**

what occurs during the reaction below 4Hcl+MnO2-->MnCl2+2H2O+Cl2 1.the manganese is reduced and its oxidation number changes from +4 to +2. 2.the manganese is oxidized and its oxidation number changes from +4 to +2. 3.the manganese is reduced and its oxidation number ...
*March 20, 2011*

**Elements of Statistics**

the world health organization's center of aids research is planning to write a report on aids infection among drug users all of the world. in a recent study conducted on 1,000,000 drug users, 52% indicated that they are using heroin on regular basis, 37% indicated that ...
*March 19, 2011*

**Chemistry (organic)**

compound x C29H48BrCl reacts with excess H2/pd to give C29H56BrCl. How many double bonds and how many rings are in X?
*March 18, 2011*

**math**

How do the 2000 and 20pyg cancel out...the first pyg is still there?
*March 14, 2011*

**math**

(Px – 20) (100 – 2 Px + Pyg) Differentiating with respect to P we get 100 – 4Px + Pyg + 40 = 0 I dont understand how this is calc... whenever I multiply through and take the deriv I get another answer. Do you first multiply Px through then 20??
*March 14, 2011*

**chemistry**

CH3C (triple bond) CH 1.BH3, THF ----> 2.H2O2, -OH ---> Na, NH3----> 1.Hg(OAc)2,H2O--->
*March 11, 2011*

**8th grade honors english**

How do I properly site sources on my research paper?
*March 8, 2011*

**calculus**

Consider the solid obtained by rotating the region bounded by the given curves about the x-axis. y = 9 - 9x^2 , y = 0 Find the volume V of this solid. Sketch the region, the solid, and a typical disk or washer. Any help or tips would be greatly appreciated; not sure how to ...
*March 8, 2011*

**Math**

There are two flavors; vanilla and chocolate.
*March 6, 2011*

**Math**

There are 256 students in this outstanding 7th grade class. How many scoops of ice cream would have to be used in each cone in order to make a different cone for each person?
*March 6, 2011*

**math**

The rule is to multiply by 1/4. 2 x 1/4 = 1/2 3 x 1/4 = 3/4 5/6 x 1/4 = 5/24 2/3 x 1/4 = 1/6
*March 6, 2011*

**math **

n = -4 or 4 (-4)^2-16=0 -4 x -4 = 16, so 16-16 = 0 or 4 x 4 = 16, so 16-16 = 0
*March 6, 2011*

**psy**

Learning the skills to achieve your financial long term goals will help you to be a more responsible adult.
*March 4, 2011*

**English**

In general, which skills, tasks, and academic areas tend to come more easily to you? Which require more focus and effort and present more of a challenge?
*February 28, 2011*

**Physical Science**

A stationary but moveable 450-kg cannon is fired and the 12-kg cannonball moves off to the right with a velocity of 20.0 m/s. What is the connon's velocity (both magnitude and direction) due to the kickback from the firing?
*February 26, 2011*

**physical science**

What numbers go where on the formula? I am sorry I just don't get it.
*February 26, 2011*

**physical science**

Two 5.0kg rocks are 0.20m apart. What is the magnitude of the gravitational attraction between the rocks?
*February 26, 2011*

**Physical Science**

If a 2.0kg object is initially moving with a speed of 10 m/s and a 6.0 N force were applied in the direction of the motion, what would be the acceleration?
*February 26, 2011*

**Unix Shell script**

Shell script Using "if" statement checks for a file called "student.txt" in the current directory. Removes (deletes) the file if it exist. This file will collect last name, first name, and grade for 5 people. Use a while loop to get the information (last ...
*February 26, 2011*

**Unix Script**

"Using "if" statement checks for a file called "student.txt" in the current directory. Removes (deletes) the file if it exist. This file will collect last name, first name, and grade for 5 people. Use a while loop to get the information (last name, ...
*February 26, 2011*

**comsumer math**

victoria has a total of twenty-four nickles and quarters. she has ten more quarters than nickles.how much money does she have?
*February 24, 2011*

**Science**

the water and waste materials we washed down toilets and sinks are called: A. pesticides B. sewage C. industrial chemicals D. fertilizer
*February 22, 2011*

**Organic Chem**

Is it possible to obtain pure (200- proof) ethanol using fractional distillation from a fermentation mixture that contains equal amounts of water and ethanol? why or why not?
*February 22, 2011*

**Physics**

A loudspeaker of mass 25.0 kg is suspended a distance of 1.00 m below the ceiling by two cables that make equal angles with the ceiling. Each cable has a length of 2.50 m . What is the tension in each of the cables?
*February 20, 2011*

**accounting**

debit accounts recievable for 9000 credit sales revenue 9000 debit cash 2500 credit accounts recievable 2500
*February 16, 2011*

**Chemistry**

which of the following is insoluble ? (1)calcium chloride (2)ammonium phosphate (3)barium sulfate (4)potassium chromate so its 3 ?
*February 13, 2011*

**Chemistry**

Draw the lewis dot structure showing what happens during the reaction Lithium and Chlorine produce Lithium Chloride. how do you draw this, please help .
*February 13, 2011*

**chem**

what happens when NaCl(s) is dissolved in water? (1)Cl-ions are attracted to the oxygen atoms of the water (2)Cl-ions are attracted to the hydrogen atoms of the water. (3)Na+ions are attracted to the hydrogen atoms of the water. (4)no attractions are involved; the crystal just...
*February 13, 2011*

**algebre**

a flower bed is the shape of a triangle with one side twice the length of the shortest side and the third side is 30 ft more than the shortest side. find the dimentions if the perimeter is 102 ft.
*February 13, 2011*

**Chemistry**

what happens when NaCl(s) is dissolved in water? (1)Cl-ions are attracted to the oxygen atoms of the water (2)Cl-ions are attracted to the hydrogen atoms of the water. (3)Na+ions are attracted to the hydrogen atoms of the water. (4)no attractions are involved; the crystal just...
*February 13, 2011*

**Immediate accounting**

debit cash 1600 credit prepaid rent 1600 after 1st month of rent is used up u have to expense it debit prepaid rent 400 credit rent expense 400
*February 12, 2011*

**chemistry**

how to convert 4.8x10^5 hL to ml?
*February 7, 2011*

**Math 156**

If a figure has two right angles, then it is a rectangle? I said that the figure is in not a rectangle if it has two right angles, because a rectangle has four right sides.
*February 5, 2011*

**Bus Ops**

Is the set up times relevant to the production time and how does it affect the due dates when using each rule?
*February 5, 2011*

**Business**

Which of the following is NOT an example of parallel structure? "Yoga can help you develop flexibility, reduce stress, and increase relaxation." "Learn how to analyze business audiences, improve your style, and edit thoroughly." "You are all encouraged...
*February 2, 2011*

**HCS/335**

so how can i strech that into 3 hundred words??
*February 2, 2011*

**HCS/335**

Are laws and regulations the problem or the solution in addressing ethical problems? Explain. What would be an alternative?
*February 2, 2011*

**fractions**

what is 2/3 of 180/3
*February 1, 2011*

**finance**

A work at home oppurtunity is available in which you will receive 3 % of sales for customers you refer.The franchise fee is $ 840.00.How much will your customers have to buy to cover the cost?
*January 31, 2011*

**finance**

Richard likes the car price of $10,000 but financing through the dealer is no bargain.He has $2,000 for a down payment,so he needs $8,000 for the loan.Richard borrows $8000 for a period of four years at an add on intrest rate of 11 %.What is the total intrest on the loan?What ...
*January 31, 2011*

**finance**

a $200 cash advance by using checks linked to to her credit card account.The bank charges a 2 % cash advance fee on the amount borrowed and offers no grace period on cah advances.Sidney paid the balance in full when the bill arrived.What was the cash advance fee? What was the ...
*January 31, 2011*

**finance**

what is the interest and cost on a 6 month loan of $1,500 at13.2% simple annual intrest
*January 30, 2011*

**physics**

A body is dropped from a height of 10 meters on Earth and hits the ground with a certain velocity. The body is then taken to the moon, which has a gravitational constant that is 1/6th the value as compared to Earth. It is dropped from the same height, hitting the ground with a...
*January 25, 2011*

**organic chemistry**

What volume of physiological saline solution (90% by weight NaCl, in water) would give you a gram of salt when evaporated?
*January 23, 2011*

**chemistry**

How to draw a lewis Dot structure for LiCl
*January 18, 2011*

**Art Appreciation**

How you feel the form of the sculptures expresses the content. And what is visual elements and principles design
*January 14, 2011*

**Human Service**

Generate a list of helpful and unhelpful responses that you personally have experienced in specfic situations- (give examples) give list of unhelpful behaviors and helpful behaviors.
*January 14, 2011*

**Science**

I have already tried.
*January 12, 2011*

**Science**

Food web of Baltimore Checkerspot butterfly. MUST NEED HELP ASAP.
*January 12, 2011*

**Science**

Different species of plants have structure/characteristics that allow them to adapt to their environment. What is this called
*January 11, 2011*

**psy 210**

examples of statistical graphs from any Internet source. Copy and paste these into your discussion response, and then explain how it is set up to give an impression that leads the reader to agree with the subject’s conclusion. Then, suggest an alternate presentation of ...
*January 10, 2011*

**MATH 12 HELP!!**

a pizza store offers 15 different toppings on its pizzas. what is the probability that 4 randomly selected toppings will include salami and green pepper?
*January 9, 2011*

**MATH 12**

two cards are drawn without replacement from a shuffled deck of 52 cards. determine the probability of each event: a) the first card is a heart and the second is the queen of hearts b) the first card is the queen of hearts and the second is a heart
*January 9, 2011*

**Physics**

I know how to do displacement, I just get confused by the directions. I walk 6 blocks east and 5 blocks north-I come up with 7.8 because I squared 6 + squared 5 and took the square root of 61 but do I say the final displacement is 7.8 blocks east of north or 7.8 blocks north ...
*January 5, 2011*

**Chemistry**

what is the total number of moles in 80.0 grams of C2H5Cl (gram-formula mass=64.5grams/mole)? (1)0.806 (2)1.24 (3)2.48 (4)5.16 please help !
*January 3, 2011*

**geometry**

Find the approximate perimeter of triangle abc with vertices a(0,8 b(6,-2 c(-4,4
*December 28, 2010*

**Communications**

Techniques for Creating Behavior Change in a Staff Member
*December 16, 2010*

**algebra**

D. to solve for x: Since y= 2x you would plug in the 2x where the y is making it 2x=-x +3. Then add an x to both sides to get all the x's on one side of the equation. So it would then look like 3x=3. Divide both sides by 3 to get the x alone and you now have x=1 then to ...
*December 15, 2010*

**college**

What are the pros and cons of matching clients and clinicians in terms of gender, ethnicity, disability, sexual orientation, or language? Does matching people along those lines ensure common experience and easy bonding?
*December 9, 2010*

**Teachers aide**

Test 02604400
*December 8, 2010*

**science**

thanks this also helps one no the probability of his or her chances or risks factors for getting the same disease (s)
*December 8, 2010*

**science**

why is it important to know your family medical history
*December 8, 2010*

**math**

A rectangular skating rink measuring 30m by 20m is doubled in area by adding a strip at one end of the rink and a strip fo the same width along one side of the rink. Find the width of the strips if the enlarged rink is still rectangular.
*December 5, 2010*

**bonar law**

Colonel Harry a. Froboess of Switzerland jumped upward and outward from a windonw of a blimp and landed in a body of water on June 22, 1936. His jump was 120m, about the height of a 40-storey building. The path of his jump can be represented by the quadratic relationship h = ...
*December 5, 2010*

**Chemistry**

Hydrogen bonding is strongest between molecules of (1)H2S (2)H20 (3)H2Se (4)H2Te
*December 2, 2010*

**4th grade**

CHIEF OR RULER OF A NARRAGANSETT TERRITORY
*November 30, 2010*

**Pen Foster Child Care**

the staff
*November 28, 2010*

**Calculus**

Find the critical numbers of the function on the interval 0 ≤ θ < 2π. Small & large value f(θ) = 2cos(θ) + (sin(θ))^2
*November 26, 2010*

**wor wic**

is 3.5% more than 54%
*November 24, 2010*

**UOP**

The final project for HSM 240 is a 1,750- to 2,100-word proposal paper on a social program that you create. Pretend that you have the power and capacity to create an agency or organization and decide to create a new social program. You need funding and decide to write to a ...
*November 21, 2010*

**Chemisty **

Describe how you would prepare 250 ml of a 0.10M NaCl solution?
*November 17, 2010*

**algebra**

what did the baby porcupine say when it backed into a cactus?
*November 16, 2010*

**algebra**

what is the perimter of a rectangle. the length is 6 more than the width and the perimeter is 44
*November 10, 2010*

**Physics**

I have a question. 2.7104 was that suppose to actually be 2.7*10^4?
*November 4, 2010*

**computer science**

what is the cost(most expensive,expensive or less costly)performance(powerful, most powerful or average)reliability(highly reliable or less reliable) size(large, medium or small)and installed in numbers(few, many or large) of super compters, mainframe computers, personal ...
*November 4, 2010*

**spanish 6th grade**

What is your favorite food
*November 1, 2010*

**trigonometry**

2 cos^2=1 [0, 2pi)
*October 30, 2010*

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