Sunday

February 26, 2017
Total # Posts: 330

**chemistry**

Molarity = moles of solute/ Liter. 5g O2 * (1 mol O2/ 32 g O2)= x moles O2 convert 250 mL to Liters X moles O2/ Liters = molarity

*December 12, 2012*

**chemistry**

When using the van't Hoff factor, I multiply the number of moles of CaCl2 by the factor right? So when finding the mole fraction of CaCl2 in the solution, it would be 3(1.22 mol CaCl2)/[3(1.22) + 12.2] which equals about .231. So then it would be dP = .231 * 239 = 55.2 mm ...

*December 12, 2012*

**chemistry**

Okay so I used the equation dP= Xsolute * Psol. I got 32.3 and it was correct. I used the exact same equation for this one, and I got 21.7. For some reason it was incorrect. What am I doing wrong? The vapor pressure of pure water at 70°C is 239 mm Hg. What is the vapor ...

*December 12, 2012*

**chemistry**

What's the difference between Psol and Pvap depression? How would I find the Pvap depression?

*December 12, 2012*

**chemistry**

The vapor pressure of pure water at 70°C is 231 mm Hg. What is the vapor pressure depression of a solution of 115 g of the antifreeze ethylene glycol, C2H6O2, a nonvolatile compound, in 205 g of water? Use molar masses with at least as many significant figures as the data ...

*December 12, 2012*

**English**

i have the words in front of me with the meaning.... so I am lost that's all I can say...

*December 6, 2012*

**English**

1. poignant 2. contend 4. conversely 7. prevalent 8. contemporary 9. charisma

*December 6, 2012*

**English**

those r my answers

*December 6, 2012*

**English**

Many people are surprised to learn how __1__ poverty is __2__ America. Today millions live below the poverty line, and the number seems to escalate daily. Judy and Martin Reed exemplify the old saying, “Opposites attract.” A __3__. Judy chooses work that brings her ...

*December 6, 2012*

**english**

then 5 has to be wrong

*December 3, 2012*

**english**

4. benefactor 7. speculate 9. alleviate

*December 3, 2012*

**english**

Shortly before the Russian Revolution, an eccentric man named Rasputin became ___1___as the "mad monk." Because he dressed like a peasant, drank heavily, and rarely bathed, the nobility often felt __2__during their encounters” with him at the palace. Yet despite...

*December 3, 2012*

**english**

Shortly before the Russian Revolution, an eccentric man named Rasputin became ______as the "mad monk." Because he dressed like a peasant, drank heavily, and rarely bathed, the nobility often felt ____during their encounters” with him at the palace. Yet despite ...

*December 3, 2012*

**English**

thank you it wouldnt surprise me if u didn't get more from these words..... from other class mates.... once again ty

*December 3, 2012*

**math**

solve the logarithmic equation. log(5x+7)=1+log(x-9)

*December 2, 2012*

**math**

find the inverse. f(x)=-2+log_4(x-4)

*December 2, 2012*

**math**

how do you write that in interval notation?

*December 2, 2012*

**math**

solve the following inequality. (x-3)^2/(x^2-4)is greater than or equal to 0.

*December 2, 2012*

**math**

find the real solutions using quadratic formula. im sorry.

*December 2, 2012*

**math**

8-(1/x)-(6/x^2)

*December 2, 2012*

**math**

find the real solutions using the quadratic formula 6-(1/x)-(4/x^2)=0

*December 2, 2012*

**math**

find the inverse of f(x)=-5+log(base5)(y-5)

*December 2, 2012*

**algebra**

Find the accumulated value of a CD of $20000 for 3 years at an interest of 3.1% if the money is compounded continously.

*November 30, 2012*

**algebra**

So, 5.9 to be exact?

*November 30, 2012*

**algebra**

How long will it take $1400 to double at 12% annual interest compounded quarterly?

*November 30, 2012*

**Physics HELP!**

A simple pendulum consists of a small object of mass 7.40 kg hanging at the end of a 2.10 m long light string that is connected to a pivot point. (a) Calculate the magnitude of the torque (due to the force of gravity) about this pivot point when the string makes a 3.00° ...

*November 7, 2012*

**Chemistry**

Find the theoretical pH of .01M and .05M benzoic acid buffer when 2ml of .1MNaOH was added to each buffer.

*November 1, 2012*

**Physics**

A ball acquires a horizontal speed of 12m/sec when a force is applied for a distance of .50m. If the ball has a mass of 1.0kg what is the force applied? ANSWER: 144N....I'm not sure what formulas I'd apply. It takes a force of 109N to life a stone straight up. This ...

*October 12, 2012*

**Chemistry**

How many times more energy is associ- ated with a 282 nm ultraviolet photon than a 5494 nm microwave photon?

*October 10, 2012*

**Statistics: Regression**

The June 1997 issue of Management Accounting gave the following rule for predicting your current salary if you are a managerial accountant. Take $31,865. Next, add $20,811 if you are top management, add $3604 if you are senior management, or subtract $11,419 if you are entry ...

*October 10, 2012*

**math**

A population is increasing according to the exponential function defined by y = 2e0.02x, where y is in millions and x is the number of years. How large will the population be in 3 years?

*August 1, 2012*

**geometry**

the radius of the base of the metallic rod is 2o centimeters and height 15 centimeters what is the volume of a cylinder

*May 22, 2012*

**geometry**

the radius of the base of the metallic rod is 2o centimeters and height 15 centimeters what is the volume of a cylinder

*May 22, 2012*

**Probability and Statistics**

A package contains 12 resistors, 3 of which are defective. If four are selected, find the probability of getting the following. No defective resistors One defective resistors 3 defective resistors

*May 17, 2012*

**Probability and Statistics**

A package contains 12 resistors, 3 of which are defective. If four are selected, find the probability of getting the following. No defective resistors One defective resistors 3 defective resistors

*May 17, 2012*

**Maths**

In a box of fruit there were 11 oranges and 9 apples. What fraction of the fruit were the oranges?

*May 2, 2012*

**veterinarians as prescribers**

Alteration of the physical form of a drug outside its label is

*April 27, 2012*

**chemistry**

calculate the pressure when 57 g of flourine at 55 degrees celsius is confined to a 152 liter container.

*April 22, 2012*

**Chemistry**

help...If exactly 5.0 mL of HNO3 will neutralize 15 mL of 2.0 M NaOH, what is the molarity of the HNO3 solution? Have no idea what to do. thank you.

*March 25, 2012*

**Statistics**

Suppose that the travel time from your home to your office is normally distributed with a mean of 40 minutes and standard deviation of 7 minutes. If you want to be 95% certain that you will not be late for an office appointment at 1:00pm, what is the latest time that you ...

*March 20, 2012*

**chemistry**

So i found the solubility to be x=0.001296, is this the concentration of I^-? can i multiply this by 30mL to get my moles?

*March 16, 2012*

**chemistry**

how can i calculate the solubility with the information given ? in class we use concentrations to find solubility

*March 16, 2012*

**chemistry**

A 30.00mL sample of a clear saturated solution of PbI2 requires 14.7mL of a certain AgNO3 for its titration. I^-(saturated PbI2)+Ag^+(from AgNO3)--> AgI(s) What is the molarity of this AgNO3? I'm not really sure where to start.

*March 16, 2012*

**chemistry**

A mixture formed by adding 55.0 mL of a 1.5x10^-2 M HCl to 140 mL of 1.0x10^-2 M HI. How do you calculate the pH for this problem?

*February 26, 2012*

**Chemistry**

Ba(OH)2(aq)+2CH3COOH(aq)=Ba(CH3COO)2(aq)+2(l)H2O what is the net ionic equation with phases?

*February 18, 2012*

**Math**

1.2mi.

*February 15, 2012*

**math**

Ms.Sue,is the ans 3?

*November 21, 2011*

**math**

4 1/5 divided 1 2/5 21/5 x 7/5 = ?

*November 21, 2011*

**Math**

thanks, I am stuck on this one 4 1/5 divided 1 2/5 21/5 x 7/5 =

*November 20, 2011*

**Math**

1. 2 1/3 x 3 1/2 = 2. 4 2/3 divided 7 =

*November 20, 2011*

**Math**

Thanks! can you please show me how to do these: 2 1/3 x 3 1/2 4 2/3 divided 7

*November 20, 2011*

**Math**

How do I estimate these? 1. 7/8 + 3 1/4 2. 5 1/9 - 2/3 3. 9 5/6 divided 2 1/8 4. 6 divided 1/2

*November 20, 2011*

**Math**

Ms. SUE, Is this correct? 4. 5/8 + 5/6 = 1 11/24 5. 13 1/2 + 7 2/3 = 21 1/6

*November 18, 2011*

**Math**

Ms. SUE, Is this correct? 4. 5/8 + 5/6 = 1 11/24 5. 13 1/2 + 7 2/3 = 21 1/6

*November 17, 2011*

**Math**

1. 9-5 3/4 = 2. 7/8 + 3 1/4 = 3. 5 1/9 -2/3 = 4. 5/8 + 5/6 = 5. 13 1/2 + 7 2/3 =

*November 17, 2011*

**Statisics Question Help Please**

The proportion of students in private schools is around 11%. A random sample of 450 students from a wide geographic area indicated that 55 attended private schools. Estimate the true proportion of students attending private schools with 95% confidence. How does it estimate ...

*October 6, 2011*

**geometry**

If EF = 4x - 19, FG = 3x - 9, and EG = 28, find the values of x, EF, ad FG.

*October 3, 2011*

**Physics**

A dart is thrown horizontally with an initial speed of 11 m/s toward point P, the bull's-eye on a dart board. It hits at point Q on the rim, vertically below P, 0.19 s later. (a) What is the distance PQ? (b) How far away from the dart board is the dart released?

*September 25, 2011*

**chemistry**

A small lake contains 0.0500 mi3 of water [H2O]. If the density of water is 1.000 g/mL, determine the volume (in gal) of water in the lake.

*September 8, 2011*

**Math Help**

When asked for standard deviation when dealing with grouped data for linear regression, do you give them for each the x and y variable or is there a way to configure for grouped data set? I have a Ti 84 plus calculator

*August 12, 2011*

**Stats**

The wildlife department has been feeding a special food to rainbow trout fingerlings in a pond. A sample of the weights of 40 trout revealed that the mean weight is 402.7 grams and the standatd deviation 8alE8 gr. What is the probability that the mean weight for a sample of 40...

*June 10, 2011*

**Calculus**

The table didn't turn out 0, goes with 0 underneath. 1 goes with 45.2 3 goes with 96.3 8 goes with 178.2 20 goes with 254.3 40 goes with 380.5

*May 9, 2011*

**Calculus**

A radar gun was used to record the speed of a racecar during the first 40 seconds while driving on a straight road. Use the chart to calculate the car's distance after 40 seconds using righthand sums. Is this an over or underestimate? Justify the answer. This is the table ...

*May 9, 2011*

**social study**

what made the hbc and nwc so imortant to this reion

*May 8, 2011*

**marketing**

Some firms are too production-oriented and inefficient. That can result in customers who are not satisfied and micro-marketing that can cost too much. Identify and explain at least three reasons for these marketing inefficiencies.

*May 6, 2011*

**Basic Marketing**

so much for trying to get a little help on which direction to go. I didn't want a full answer just sometips of where to do some research.

*May 6, 2011*

**Basic Marketing**

A large number of forces shape the marketing environment. The technological environment is one of the most important today. Discuss the impact of technology on marketing including, the opportunities, challenges and ethical issues technology poses for marketing.

*May 6, 2011*

**chemistary**

Explain the words element compound and mixture. Identify which substances ara element compound and mixture

*May 4, 2011*

**vocab**

Directions: Use the underlined etymology clues to help you choose the correct word that is missing from each of the following sentences. 3. The [underlined](Middle English, from Old French boc, "male goat")[/underlined] had a physically demanding job. A. son B. ...

*April 25, 2011*

**Physics**

a carton of eggs sits on the horizontal seat of a car as the car rounds a 26 meter radius bend at 16.5m/s. what is the minimum coefficient of friction that must exist between the carton and the seat if the eggs are not to slip?

*April 25, 2011*

**Physics**

a carton of eggs sits on the horizontal seat of a car as the car rounds a 26 meter radius bend at 16.5m/s. what is the minimum coefficient of friction that must exist between the carton and the seat if the eggs are not to slip?

*April 25, 2011*

**math**

a vector has a magnitude of 18.3 cm and a direction of 38 degrees. find the magnitude of its vertical and horizontal components to the nearest tenth.

*April 19, 2011*

**Geometry**

In the accompanying diagram, ABC and AB are congruent to BC. If the coordinates of C are (2,3) and the coordinates of B are (0,0), find the coordinates of A.

*April 7, 2011*

**Chemistry**

how do you compensate for coefficents while using a BCA chart? I know that you have to while using an ICE chart by multiplying by 2 when the coefficient is 2 etc, so that's why I was wondering...

*March 24, 2011*

**earth**

How many minutes does it take for light from the sun to reach the earth?

*March 22, 2011*

**Algebra 1**

To train for a race, Will begins by jogging 11 minutes one day per week. He increases his jogging time by 5 minutes each week. Write the general term of this arithmetic sequence, and find how many whole weeks it takes for him to reach a jogging time of one hour

*March 7, 2011*

**Algebra 1**

Evaluate the given binomial coefficient ( 8 ) 4

*March 7, 2011*

**Algebra 1**

The function A = A0e-0.01386x models the amount in pounds of a particular radioactive material stored in a concrete vault, where x is the number of years since the material was put into the vault. If 500 pounds of the material are initially put into the vault, how many pounds ...

*March 7, 2011*

**Algebra**

Solve the problem. A salesperson gets a commission of $600 for the first $10,000 of sales, and then $300 for each additional $10,000 or partial of sales. Let S(x) represent the commission on x dollars of sales. Find the value of S(45,000)

*February 27, 2011*

**Algebra 1**

Larry has $2600 to invest and needs $3000 in 11 years. What annual rate of return will he need to get in order to accomplish his goal, if interest is compounded continuously?

*February 22, 2011*

**Algebra 1**

Use Cramer's rule to solve the system. -2x - 2y = -16 2x + 3y = 23

*February 18, 2011*

**Algebra 1-Matrix**

In a certain county the proportion of voters in each age group registerd as Republicans and Democrats or Indpendence is given by the following matrix which is called A. 18-30 31-50 Over50 Republican 0.40 0.30 0.70 Democrat 0.30 0.60 0.25 Indpendent 0.30 0.10 0.05 The ...

*February 18, 2011*

**math**

factor y^2-81 (y+9)(y-9) have i factored it correct?

*January 19, 2011*

**Math**

Solve by using the multiplication principle -2x> 1 over 9 I have tried this problem and can get no where with it can someone please help me????

*January 19, 2011*

**College Algebra**

f(x)=3.1ã(x+19 1.Decribe the graph be obtained using transformations of the square root function. First, vertically stretch the graph of f (x) = by the factor 3.1; then shift the results up 19 units. 2.Determine how to tell the model describes the actual height of...

*January 14, 2011*

**English1**

Underline the correct pronoun of each pair in parentheses. 1. Women (who, whom) raise families do as much work at home as at their jobs. Whom 2. In North America society, it is still mainly women (who, whom) cook dinner, clean the house, check the children’s homework, ...

*January 5, 2011*

**English 1**

Underline the correct pronoun of each pair in parentheses. 1. Women (who, whom) raise families do as much work at home as at their jobs. whom 2. In North America society, it is still mainly women (who, whom) cook dinner, clean the house, check the children’s homework, ...

*January 5, 2011*

**English 1**

Underline the correct pronoun in parentheses. 1. Many so-called Founding Fathers are famous one or two of (his, his or her, their) accomplishments, but anyone who knows (his, his or her, their) history knows that Franklin is known for many things, including (his, her, his or ...

*January 5, 2011*

**English 1**

Underline the correct pronoun of each pair in parentheses. 1. Women (who, whom) raise families do as much work at home as at their jobs. Whom 2. In North America society, it is still mainly women (who, whom) cook dinner, clean the house, check the children’s homework, ...

*January 4, 2011*

**English 1**

Combine each set of sentences into one sentences so that it contains two independent clauses. Use a semicolon correctly between the two clauses. 1. Tesla was born in what is now Croatia and studied at the Technical University at Graz, Austria. He excelled in physics, ...

*January 4, 2011*

**English 1**

1. Many so-called Founding Fathers are famous one or two of (his, his or her, their) accomplishments, but anyone who knows (his, his or her, their) history knows that Franklin is known for many things, including (his, her, his or her, their) inventions. their, his or her, ...

*January 4, 2011*

**Humanities**

how does humanities differ from Middle Ages to contemporary times.

*January 4, 2011*

**Physics**

162.533N

*December 20, 2010*

**Social Studies**

What are 6 significant events important to Americans that occurred during World War II?

*December 10, 2010*

**physics**

Henry drives off a 200m high cliff at 132m/s.How far out,how far down,and how far all together did he travel in 2.6seconds

*December 2, 2010*

**physical science**

a 2.0 kg rock sits on the edge of a cliff 12m above the beach. The rock falls off the cliff. How much kinetic energy will it have just before it hits the beach?

*November 22, 2010*

**cmo155**

Students are often confused about the use of the words good and well in their writing. Write a 100-word passage to Susan Anker, the author of the course’s textbook, in which you describe five details from her book that are good and five details about the book that are ...

*November 16, 2010*

**chem**

Which has highest boiling point? H20, H2S, H2Se, H2Te i know its H20, but why? is it because its dipole dipole? does it have to do with electronegative, or polarity?

*October 11, 2010*

**spanish**

Look at your conjugations yo- pienso tu- piensas el/ella/ud.- piensa nosotros- pensamos ellos(as)/uds.- piensan Tu would be piensas

*September 9, 2010*

**Math**

When would you make a list to sove a problem?

*September 2, 2010*