Thursday

April 24, 2014

April 24, 2014

Total # Posts: 85

**chemistry**

A 0.5917 g sample of a pure soluble chloride compound is dissolved in water, and all of the chloride ion is precipitated as AgCl by the addition of an excess of silver nitrate. The mass of the resulting AgCl is found to be 1.5683 g. What is the mass percentage of chlorine in t...

**chemistry**

When aqueous solutions of potassium hypochlorite and nitric acid are mixed, an aqueous solution of potassium nitrate and hypochlorous acid results. Write the net ionic equation for the reaction. Use H+ for the hydronium ion.

**Chemistry 1150**

Instant cold packs, often used to ice athletic injuries on the field, contain ammonium nitrate and water separated by a thin plastic divider. When the divider is broken, the ammonium nitrate dissolves according to the following endothermic reaction: NH4NO3(s)→NH+4(aq)+NO...

**Physics**

A speedboat increases in speed from 21 m/s to 30.9 m/s in a distance 191 m. a)Find the magnitude of its acceleration. Answer in units of m/s^2. b)Find the time it takes the boat to travel this distance. Answer in units of s.

**math**

8x + 5y = -144 4x + y = -36

**chemistry**

. Which of the following will result in a chemical change? A. Melting ice to obtain water B. Evaporating alcohol into vapor C. Drying wood in a shed D. Burning coal in a furnace 2. A salt is obtained as a reaction between A. a nonmetal and a metal. B. a base and water. C. an a...

**Physics**

A student applies a force of magnitude 39.0 N at an angle of 22.6o with the horizontal to push a 4.00-kg textbook 1.00 m across a table from rest to a final speed of 1.75 m/s. Find the work done by friction on the textbook.

**Personal Finance**

What does it mean by 401k Investment Vehicles?

**personl finance**

What does it mean by 401k Investment Vehicles?

**chemistry**

The presence of a catalyst provides a reaction pathway in which the activation energy of a certain reaction is reduced from 188 kJ/mol to 86 kJ/mol which increases the rate of the reaction. How many times faster is the reaction with the catalyst at 307 K, all other factors bei...

**chemistry**

I did that for both temperatures and divided both of them by each other but my answer is incorrect.

**Introduction to Psychology**

Alexander, a fifth- grade teacher, believes that Kimberly's behavior is a result of poor parenting, The school concerned with her inability to focus, attend to directions, and recall information from the previous day or events from earlier in the day.

**Introduction to Psychology**

Behavioral and Psychodynamic perspectives differ in that the former emphasizes the ______ while the latter focuses on _____.

**Introduction to Psychology**

Dr. Hall believes that thought processes determine behavior.She encourages her patient to examine the way he looks at problems and solves problems. They look for successful and unsuccessful evaluations and strategies.

**math**

ht tp://ww w.you tube.c om/watch?v=xjV HHE22r3I

**RES/341**

ht tp://ww w.you tube.c om/watch?v=xjV HHE22r3I

**College Physics - Acceleration**

ht tp://ww w.you tube.c om/watch?v=xjV HHE22r3I

**Math **

Beaufort Scale and Wind Effects 0 Smoke rises vertically 1 Smoke shows wind direction 2 Wind felt on face 3 Leaves move, flags extend 4 Paper, small branches move 5 Small trees sway, flags beat 6 Large branches sway, flags beat 7 Large branches sway, walking is difficult 8 Twi...

**math**

Beaufort Scale and Wind Effects 0 Smoke rises vertically 1 Smoke shows wind direction 2 Wind felt on face 3 Leaves move, flags extend 4 Paper, small branches move 5 Small trees sway, flags beat 6 Large branches sway, flags beat 7 Large branches sway, walking is difficult 8 Tw...

**algebra**

If a pro basketball player has a vertical leap of about 20in., what is his hang time? Use the hang time function v=49t^2

**algebra**

Rationalize the denominator, assume that all expressions under radicals represent postive numbers. sqrt:a - sqrt:b/sqrt:a + sqrt:b

**Math**

you are welcome i hope that helped you

**Math**

on what i was taught is move the decimal back until you cant move it back and count how many times you had moved it and you will have that many 0s

**Math**

350/1000 thats the answer

**math**

thank you very much ms.Sue

**math**

To advertise their business, Toni and Mandy can either purchase flyers or e-mail addresses. They can print, distribute and pay the postage of 3 million flyers for $450. Find the unit price for the flyers.

**algebra**

thanks for the help Damon

**algebra**

Write an equation of the line containing the specified point and parallel to the indicated line.(1,4)3x+y=5

**Chemistry**

An unsaturated hydrocarbon is a hydrocarbon containing at least one double or triple bond.

**honors geometry**

That's kind of hard to imagine, but it seems to me you just plug 9 in into the formula... Please clarify if I'm wrong.

**Biology**

It definitely would affect the economy, since people eat that.

**Critical Thinking (philosophy)**

questions 1-25

**Human Development**

Blake amuses and challenges his teachers with his independent thinking. He’s self-reliant and responds appropriately to corrections and criticism. Blake’s parents probably use the _______ style of child rearing. A. permissive C. authoritative B. authoritarian D. emot...

**math**

How much money must I start out with if I want to end up with 20,000 over 5 years with and intrest rate of 5% a year.

**chi-square test**

the assumptions for using a chi-square test. Research articles provide practical examples from the research to support your assumptions. Include a citation of one article you used for your research

**analysis of variance **

which analysis of variance should be applied when an experiment has more than one independent variable. Discuss the assumptions and limitations of the analysis of variance in comparison with the t test including a discussion of post hoc tests

**statistic**

how a t Test for a dependent variable can be of great value in applying a new approach to the treatment of aggressive behavior to a small group of students. Why would this t Test be preferred to using another test statistic?

**hypothesis statistic**

how a t Test can be employed in hypothesis testing by the use of directional vs. nondirectional hypotheses. Discuss types of research where using the t statistic may be an appropriate alternative to using a z-score. Respond to at least two of your fellow students’ postin...

**AP Calculus**

True or False If f'(c)=0=f''(c)is less than 0, the f(c) is a local maximum. Justify your answer.

**psy325**

For each of the following samples that were given an experimental treatment, test whether these samples represent populations that are different from the general population: (a) a sample of 10 with a mean of 44, (b) a sample of 1 with a mean of 48. The general population of in...

**psy325**

For a population that has a standard deviation of 10, figure the standard deviation of the distribution of means for samples of size- (b) 3

**chemistry**

Why is the ionic compound NaCl (table salt) able to dissolve in a glass of the molecular compound water (H2O)?

**chemistry**

If 35.8 grams of LiCl are dissolved in 184 grams of water, what is the concentration of the solution in percent by mass?

**chemistry**

What would be the resulting molarity of a solution made by dissolving 21.9 grams of KCl in enough water to make an 869-milliliter solution?

**chemistry**

If 2.1 moles of CaCl2 are dissolved in enough water to make a 0.92-liter solution, what is the resulting molarity?

**chemistry**

if it requires 35.0 milliliters of 0.50 molar NaOH to neutralize 25.0 milliliters of HCl, what is the concentration of the HCl solution? Balanced equation: NaOH + HCl yields NaCl + H2O

**chemistry**

If 2.1 moles of CaCl2 are dissolved in enough water to make a 0.92-liter solution, what is the resulting molarity? 0.44 M CaCl2 0.70 M CaCl2 2.3 M CaCl2 3.0 M CaCl2

**chemistry**

Water is a polar solvent. Which of the following will not dissolve in water? sugar table salt vinegar olive oil

**chemistry**

How many liters of fluorine gas, at standard temperature and pressure, will react with 23.5 grams of potassium metal?

**chemistry**

Under certain conditions, neon (Ne) gas diffuses at a rate of 7.0 centimeters per second. Under the same conditions, an unknown gas diffuses at a rate of 4.9 centimeters per second. What is the approximate molar mass of the unknown gas? 6.5 g/mol 11 g/mol 20 g/mol 41 g/mol

**chemistry**

78.4 liters thank you!

**chemistry**

What is the volume of 3.5 moles of oxygen gas (O2) at standard temperature and pressure (STP)? 6.4 L 22.4 L 32.0 L 78.4 L

**chemistry**

Which of the following gases effuses the fastest at a given temperature? Ne CH4 Ar H2

**chemistry**

How many grams of methane gas (CH4) are in a 15.8 liter sample at 1.2 atmospheres and 27°C

**chemistry**

Under certain conditions, neon (Ne) gas diffuses at a rate of 7.0 centimeters per second. Under the same conditions, an unknown gas diffuses at a rate of 4.9 centimeters per second. What is the approximate molar mass of the unknown gas?

**algebra II**

If a pro basketball player has a vertical leap of about 25 inches, what would his hang time be? Use V=48T^2 Answer:_______seconds.

**Eurpoean History **

Late 1800s to early 1900s

**Eurpoean History **

How did imperial forces entice resistant countries into submission? What role did the promise of democracy play? In your opinion, was this promise kept? Why or why not?

**algebra**

sarah has dimes and nickels which total $1.65. the number of nickels she has is 3 less than the number of dimes. how many of each does she have?

**math**

i posted a different question. why did they get deleted?

**math**

two planes take off from an airport at the same time and head in opposite directions at 260 mph and 275 mph respectively. in how many hours will they be 1605 miles apart?

**math**

a coast guard ship left the port at 30 mph. four hours later a helicopter was dispatched at 90 mph to intercept the ship. how long will it take the helicopter to catch the ship?

**algebra**

an insecticide originally contained 1/2 oz of pyrethrins. the new formula contains 5/8 oz of pyrethrins. what percent of pyrethrins of the original formula does the new formula contain?

**algebra**

Solve by elimination 7r-5s=41 5r+7s=61

**math**

ok thanks i thought it was that simple, just wanted to check my answer.

**math**

Evaluate 80mi/h x 3 h Be sure to use the proper units

**math**

is that 40 square feet?

**math**

A rectangular window is 5 ft by 8 ft. Becky wants to replace the glass in the window. How many square feet of glass should she buy?

**geometry**

Let A = {circle, square} and let B = {3, 4, 5}. Find A X B

**11th grade English**

Write your own journal entry from the perspective of a member of Bradford's colony. What do you think of these unruly pirates? What shocks you the most about these surly characters? How do the manners of the pirates differ from yours?

**Government**

What's the U.S model of corporate control? What are its consequences for the American society?

**college trig**

From a point on the ground a person notices that a 110-ft tree on top of a hill subtends an angle of 3°. If the angle of elevation to the bottom of the tree, represented by angle A in the figure below, measures 37°, find the height h of the hill

**College Chemistry**

A 38 L gas tank at 35 Celsius has nitrogen at a pressure of 4.65 atm. The contents of the tank are transferred without loss to an evacuated 55.0L tank in a cold room where the temperature is 4 Celsius. What is the pressure of the tank??

**us history**

FGAFA AAVXA DGAVX VADAD DVDDD VGAV

**us history**

cryptogram grid

**Health**

What short-term and long-term health conditions are direct consequences of the obesity epidemic? What individual and societal changes can help reverse the obesity epidemic?

**governmnet**

Describe the basic character of the unitary states. how can one reconcile the concept of the unitary state with the principles of the Declaration of Independence?

**college**

what kind of government does the Gayanashagowa represent?

**Calculus**

Find the maximum and minimum values of f(x,y,z)=x+4y+5z on the sphere x^2+y^2+z^2=1.

**finance**

suppose the Wrights found that both Tom and Sue had a life insurance protection gap of $50,000. Present the steps in sequence how Wrights should proceed to search for protection to close that gap?

**math**

one decimeter is equal to....how many centimeters

**Math**

.8x/.8 = 12,590/.8 x= 15,737.50 But where did you get 0.8 from?

**Math**

The sales price of a car is 12,590, which is 20% off the original price. What is the Original price?

**Math**

If sally can paint a house in 4hrs, and John can paint the same house in 6hrs, How long will it take for both of them to paint the house together?

**Math**

Jim is able to sell a hand-carved statue for $670 which was a 35% profit over his cost. How much did the statue originally cost him? How do you find the answer to this?

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