Tuesday

December 1, 2015
Total # Posts: 88,561

**Chemistry (Check)**

How many grams of NaOH are in 500 mLm of a 0.50M solution? 500mL --> .5L MM NaOH = 39.997g M x V = n .5 x .5 = .25moleNaOH .25moleNaOH x (39.99711gNaOH / 1moleNaOH) = 10.gNaOH Is this right? If not, what am I doing wrong?
*November 3, 2015*

**science**

If 0.188 moles of zinc reacts with excess lead(IV) sulfate, how many grams of zinc sulfate would be produced in the following reaction?
*November 3, 2015*

**science**

If 0.188 moles of zinc reacts with excess lead(IV) sulfate, how many grams of zinc sulfate would be produced in the following reaction?
*November 3, 2015*

**Chemistry **

In a titration of 35 mL of 0.40 M H3PO4 with 0.30 M KOH solution, what volume (in mL) of KOH solution is needed to reach the last equivalence point (i.e., point in the titration where enough KOH has been added to neutralize all three of the acidic protons in the phosphoric acid)?
*November 3, 2015*

**1CHEM**

In a titration of 35 mL of 0.40 M H3PO4 with 0.30 M KOH solution, what volume (in mL) of KOH solution is needed to reach the last equivalence point (i.e., point in the titration where enough KOH has been added to neutralize all three of the acidic protons in the phosphoric acid)?
*November 3, 2015*

**Chemistry **

In a titration of 35 mL of 0.40 M H3PO4 with 0.30 M KOH solution, what volume (in mL) of KOH solution is needed to reach the last equivalence point (i.e., point in the titration where enough KOH has been added to neutralize all three of the acidic protons in the phosphoric acid)?
*November 3, 2015*

**intro to computers**

which option below represents a task that can be conducted in Excel through sorting? A. showing all cells that have a number that ends with a 5 B. showing all cells that have nothing in them. C. showing all cells that have the word "widget" in them. D. Displayig the ...
*November 3, 2015*

**algebra **

Part A: Darla rented a room for 3 days at $285.00 per day. If she rents the same room for 6 days, it would cost $510. Write an equation in the standard form to represent the total rent (y) that Darla has to pay for renting the room for x amount of days. (4 points) Part B: ...
*November 3, 2015*

**AP Chemistry **

At 25 degrees C, a sample of NH3( molar mass 17 g) effuses at the rate of .050 mole per minute. Under the same conditions, which of the following gases effuses at approxiomatesly half that rate? A- O2 B- He2 C-CO2 D-CI2 E-CH4
*November 3, 2015*

**St.therese'sSchool padrauna **

Ravish Saves 15 % Of his pocket money which is Rs 500 per month. How much is his pocket money? How can to solve this Question
*November 3, 2015*

**health**

What are the long-term benefits of smoking cessation? A. Decreased risk of stroke B. Decreased risk of lung and other cancers C. Decreased risk of coronary heart disease D. All of the above
*November 3, 2015*

**math**

1/3 (12p + 9q)
*November 3, 2015*

**Algebra**

The perimeter of the rectangle is 112 units. Find the length of side PQ (bottom). . Write your answer without variables. SR (top): 4z-2 SP (side):3z+2
*November 3, 2015*

**math**

when making a batch of orange juice for her basketball team, Jackie used 5 time as much water as concentrate, There were 32 more cups of water than concentrate.How much juice did she make in all. She poured the juice into quart containers. How many containers could she fill
*November 3, 2015*

**math**

when making a batch of orange juice for her basketball team, Jackie used 5 time as much water as concentrate, There were 32 more cups of water than concentrate.How much juice did she make in all. She poured the juice into quart containers. How many containers could she fill
*November 3, 2015*

**Chemistry (Check)**

Thanks!
*November 3, 2015*

**Chemistry (Check)**

PF3 reacts with XeF4 to give PF5 2PF3(g) + XeF4(s) --> 2PF5(g) + Xe(g) How many moles of PF5 can be produced from 100.0 grams of PF3 and 50.0 grams of XeF4? 100.0gPF3 x (1molePF3 / 87.96896gPF3) x (2molesPF5 / 2molesPF3) = 1.14molesPF5 50.0gXeF4 x (1moleXeF4 / 207.2836gPF3...
*November 3, 2015*

**Chemistry**

Thank you! I think I understand it a bit better
*November 3, 2015*

**Chemistry**

The thermite reaction, used to weld rails together in the building of railroads, is described by the following equation. Fe2O3(s) + 2Al(s) --> Al2O3(s) + 2Fe(l) Calculate the mass of iron metal that can be prepared from 150 grams of aluminum and 250 grams of iron (III) ...
*November 3, 2015*

**Math**

Zachary pitches twice a week. He throws an average of 75 pitches in a game. How many pitches does he throw in one week
*November 2, 2015*

**Chemistry - Acid and Bases**

In aqueous solution, classify these compounds as strong acids, weak acids, strong bases, weak bases, or other. HNO3 HBr HF CH3COOH H3PO4 NaOH Ba(OH)2 (CH3)3N NH3 NaCl
*November 2, 2015*

**Geography**

I put what happens at one scale can be affected by what happens at others
*November 2, 2015*

**Geography**

How does changing scales help better understand issues such as IMR and CMR
*November 2, 2015*

**Math**

Describe how a 60 degree angle complements a 30 degree angle. Describe how a 60 degree angle supplements a 120 angle.
*November 2, 2015*

**MATH HELP PLEASE**

The answer to the analyze it question is that the Pythagorean Theorem is very precise. But the ruler is not very precise and is basically an estimate of the length of the side.
*November 2, 2015*

**MATH HELP PLEASE**

Fine. Don't help me. I see you don't care. get out of here
*November 2, 2015*

**MATH HELP PLEASE**

Mrs. Sue that was a different Anonymous omg
*November 2, 2015*

**MATH HELP PLEASE**

Mrs. Sue that was a different Anonymous omg
*November 2, 2015*

**MATH HELP PLEASE**

duh every question
*November 2, 2015*

**MATH HELP PLEASE**

Well, I'm just really confused like with: 4. Measure the diagonal of the triangle: ____________________________________ Use the Pythagorean Theorem ( a^2+b^2=c^2) to determine the length of the diagonal (hypotenuse): ...
*November 2, 2015*

**MATH HELP PLEASE**

Semester A Unit 4 Lesson 5: Cool Crafts Portfolio Template Choose a room you would like to decorate: _My bedroom________________________________ Measure the length of one wall in inches: _ 12 feet: 144 inches__________________________ 2. Choose a size of paper to use. *I ...
*November 2, 2015*

**m**

xxxxxx
*November 2, 2015*

**Math HELP PLEASE**

meters
*November 2, 2015*

**Math HELP PLEASE**

SO 144 INCHES?
*November 2, 2015*

**Math HELP PLEASE**

12
*November 2, 2015*

**Math HELP PLEASE**

How many inches a wall in an everyday house might be? Sorry this is for a math portfolio, this isn't the question, but I just need the inches of a wall. I did use measuring tape. I got 22, even though measuring tape, it measured in Feet and Meters. I used another measuring...
*November 2, 2015*

**health**

A function of the female reproductive system is to provide a nourishing environment in which fertilized ____ can grow A.Ovary B. Sperm*** C.Egg D.Uterous
*November 2, 2015*

**French**

Which of the following sentences is correct to say, "I vacuumed"? I see both types online. 1. J'ai passé l'aspirateur. 2. Je suis passé l'aspirateur.
*November 2, 2015*

**statistics**

when figuring mode, mean and median do you add all the like figure such as days and no. of discharges? you don't just add all the numbers up together right?
*November 2, 2015*

**PLEASE HELP MS SUE!!!!!!!!!!!!!!!!!!!!!4**

when creating an input/output table where do you enter the formula? in the input cell in the output cell in the title cell in the table of contents Im confused which is correct i say ether title cell of table of contents which is right PLEASE I NEED HELP ASAP!!!!
*November 2, 2015*

**input output tables **

when creating an input/output table where do you enter the formula? in the input cell in the output cell in the title cell in the table of contents Im confused which is correct i say ether title cell of table of contents which is right PLEASE I NEED HELP ASAP!!!!
*November 2, 2015*

**Physics**

2250
*November 2, 2015*

**Maths**

The l of a rectangular field in 3 times its bredth . If the area of the field be 147 sq.m .find the l of the field
*November 2, 2015*

**College Algerbra**

A student must leave for campus in 10 minutes or he will be late for class. Unfortunately, he is snowed in. He can shovel the driveway in 18 minutes, and his brother claims to be able to do it in 12 minutes. If they shovel together, how long will it take to clear the driveway...
*November 2, 2015*

**expressions**

three less than twice a number is the same as the number increased by eight
*November 2, 2015*

**College Algerbra**

I=N/P+c, solve for P
*November 2, 2015*

**College Algerbra**

P=N/1+i is used to determine what amount of principle P should be invested for one year at simple interest rate i in order to have N dollars after a year. Solve the formula for i.
*November 2, 2015*

**Chemistry (Help)**

For the chemical reaction, sodium hydroxide + copper (II) chloride = "robin's egg blue" precipitate, do the following: write the balanced molecular, balanced total ionic, and balanced net ionic equations; determine the Limiting Reactant (LR) for each chemical ...
*November 2, 2015*

**Chemistry (Check and Help)**

Upon the combustion of propane, C3H8, 150. g of propane was reacted with excess oxygen gas. A. Determine the limiting reactant if the water is the product of interest. B. Determine the number of grams of water produced. C. Calculate the number of grams of water obtained in the...
*November 2, 2015*

**Chemistry (Check and Help)**

Determine the type of chemical reaction, find the limiting reagent, determine the amount of product in grams, and the amount in grams of excess reagent. 8.75 g of mercury (II) nitrate solution is mixed with 9.83 g sodium iodide solution (ppt). Hg(NO3)2(aq) + 2NaI(aq) --> ...
*November 2, 2015*

**Chemistry (Check and Help)**

Determine the type of chemical reaction, find the limiting reagent, determine the amount of product in grams, and the amount in grams of excess reagent. 6.95 moles of glucose C6H12O6(s) is combusted with 7.54 moles of O2 gas (both products!) C6H12O6(s) + 6O2(g) --> 6CO2(g...
*November 2, 2015*

**Chemistry (Check)**

Determine the type of chemical reaction, find the limiting reagent, determine the amount of product in grams, and the amount in grams of excess reagent. Calcium nitrate is decomposed with heat to give calcium nitrite and oxygen gas. Start with 15.99g of calcium nitrate. Ca(NO3...
*November 2, 2015*

**Chemistry (I tried to do more)**

I tried something for this. could you please check? Limiting reagent is Cr because O2 is unlimited. For every 4 moles of Cr, there's 3 moles of O2. 38.5molesCr (3molesO2 / 4molesCr) = 28.9 moles O2. Molar Mass of O2 is 32 so 1moleO2 = 32gO2. 28.9molesO2 (32gO2 / 1moleO2...
*November 2, 2015*

**Chemistry**

Determine the type of chemical reaction, find the limiting reagent, determine the amount of product in grams, and the amount of grams of excess reagent. Chromium metal is heated with oxygen to give chromium (III) oxide. Start with 38.5 moles chromium metal and unlimited oxygen...
*November 2, 2015*

**business**

Suppose you are a financial manager stationed in a foreign country and your boss at headquarters in New York asks you to make a prediction about the future exchange rates in the country you are currently in. You see that the economy in the country you are in has started to ...
*November 1, 2015*

**SS**

That seems good. Thanks!
*November 1, 2015*

**SS**

What would be a modern example?
*November 1, 2015*

**SS**

What is an example of leaders using military force to gain wealth or power?
*November 1, 2015*

**business**

Consider a large multinational consumer product company with operations in all major advanced and emerging economics. Now suppose the value of Indonesian and South African currencies drops dramatically and the value of the Chinese rmb increases dramatically. What kind of ...
*November 1, 2015*

**business**

Suppose you are running a very small business that exports all of its products to Europe, and 100% of your revenue comes from euros. You have a family to support and a drop in the value of the euro could be devasting to your personal financial situation. What methods do you ...
*November 1, 2015*

**Urgent physics help**

Can you add a displacement vector and a velocity vector?
*November 1, 2015*

**need help**

I'm a teacher one of my kids ask me to help them out but I don't know them can you please help me then being rude
*November 1, 2015*

**need help **

ESSAY EXAMINATION 1 Objective To successfully complete the course, you must complete Essay Examination 1, which requires you to write your answers to specific questions covering important concepts from your studies. Please provide your answers using a Microsoft Word file. You ...
*November 1, 2015*

**Health statistics**

13.85x1.035=14.33
*November 1, 2015*

**Health statistics **

An employee currently earning $13.85 per hour has been awarded a 3.5 percent merit raise. What will gge employee's hourly salary be with this increase. 13.85x3.5=48.475 is what I'm thinking
*November 1, 2015*

**SS**

What is an example of leaders following the Persian example of tolerance?
*November 1, 2015*

**Algorithm**

Please, anyone who can help? pseudocode to display the next date of a Gregorian date given by a user considering a leap year. (just a language independent pseucode) I'm exhausted right now
*November 1, 2015*

**statistics**

An exam is standardized to a Normal model, with a mean of 105 and a standard deviation of 18. Based on the Normal model N(105, 18) What exam score represents the 96th percentile? What percentile of an exam score of 100 represent?
*November 1, 2015*

**Math**

Simplify this expression 25.515+0.85870(25-x) for x>25
*November 1, 2015*

**Chemistry**

For the chemical reaction, sodium hydroxide + copper (II) chloride = "robin's egg blue" precipitate, do the following: write the balanced molecular, balanced total ionic, and balanced net ionic equations; determine the Limiting Reactant (LR) for each chemical ...
*November 1, 2015*

**physics 6**

a bottle has a mass of 70 g when it is epty , 90 g when it is full of water and 96 when it is full of a liquid what is the density of the liquid
*November 1, 2015*

**Physics**

a diver of weight 600N stands at the end of a uniform 4.48m diving board of weight 150 N. The board is attatched to two pdestals 1.55m apart. Find the tension or compression in each of the pedestals.
*November 1, 2015*

**Math**

Find B when A = 76 degs, a = 34, and b = 21. My ans: 0.5993 degs Determine the area of the triangle in which A = 126 degs, b = 9, and c = 10. My ans: 36.41^2 units? Find a when C = 130 degs, B = 29 degs, and c = 15. My ans: 7.02
*November 1, 2015*

**Calculus**

Use the Shell Method to compute the volume V of the solid obtained by rotating the region enclosed by the graphs of the functions y = x^2, y = 8 − x^2,and x = 1/2 about the y-axis. Here is how I set up the integral: 2 pi integral sign [-2,2] (1/2 - x)[(8-x^2)- (x^2)]dx ...
*October 31, 2015*

**Government**

Explain five ways that a president can leave office.
*October 31, 2015*

**Principles of Finance**

5.16
*October 31, 2015*

**AP PHSYICS DUE LATE HOMEWORK HELP!!!**

write it out more easier to read
*October 31, 2015*

**AP PHSYICS DUE LATE HOMEWORK HELP!!!**

whats the answer?
*October 31, 2015*

**AP PHSYICS DUE LATE HOMEWORK HELP!!!**

explain 5 some more please
*October 31, 2015*

**AP PHSYICS DUE LATE HOMEWORK HELP!!!**

there is an answer for #4
*October 31, 2015*

**AP PHSYICS DUE LATE HOMEWORK HELP!!!**

4. Assuming that ball 1 was thrown with an initial velocity of 5 m/s, how far will it land away from the building horizontally? A. 10 M b. 16 M C. 21 M D. 0.63 M 5. A projectile is launched a t 35 m/s at an angle of 33 degrees. Determine (a) the maximum height of the ...
*October 31, 2015*

**Math**

Use cross products to see if each pair of ratios forms a proportion. Replace each box with a =or a = with a / thru the = 1: 7/5 box 10/15= =/ 2:6/8 box 15/20= = I pick the answers because I cross multiply. Idk. The reason why i had picked those that is way i am asking for help
*October 31, 2015*

**Biology**

Needed to transport proteins and lipids throughout cytoplasm. Must be able to work within complicated membrane passages. Some positions involve work with ribosomes
*October 31, 2015*

**physics**

A car slows down uniformly from a speed of 15.0 m/s to rest in 6.00 s .
*October 31, 2015*

**physics**

A car slows down uniformly from a speed of 15.0 m/s to rest in 6.00 s .
*October 31, 2015*

**physics**

4. Assuming that ball 1 was thrown with an initial velocity of 5 m/s, how far will it land away from the building horizontally? A. 10 M b. 16 M C. 21 M D. 0.63 M 5. A projectile is launched a t 35 m/s at an angle of 33 degrees. Determine (a) the maximum height of the ...
*October 31, 2015*

**Chemistry**

5CrO42-+2MnO4-+16H+->2MN2++8H2O+10CO2 .1818gC2O4*1mol/88.019gNaC2O4*2molMnO4-/5molC2O42-=8.2618^-4mol/.02812l=.02938M (Was I supposed to use the molar mass of NaCrO4 or just CrO4 for this step?) 2)16H++5Sn2++2MnO4- -->5Sn4++2Mn2++8H2O .02938M*.035L=.001028mol MnO4- ....
*October 31, 2015*

**Chemistry **

A 0.1818 g sample of sodium oxalate required 28.12 ml of a potassium permanganate solution to reach the endpoint (assume the reaction was carried out in excess acid). A 5.000 g sample of tin (II) sulfate containing potassium sulfate as an impurity was found to require 35.00 ml...
*October 31, 2015*

**ap physics**

a ball 1 is thrown horizontally from the top of a building that is 50 meters tall. if another ball 2 is dropped at the same time as the first is released, which ball will hit the ground first? A. ball 1 B. ball 2 c. they land at the same D. depends of the initial velocity of ...
*October 31, 2015*

**AP PHYSICS HELP**

u=5 meters?
*October 31, 2015*

**AP PHYSICS HELP**

A ball rolls off a 1 meters high desk and hits the ground 5 m away from the bottom of the desk. Determine the initial velocity of the ball. Free response
*October 31, 2015*

**AP PHYSICS HELP**

I still need help ebcause the answers are A. 2.5 m/s B. 5 m/s C. 1.75 m/s D. 2 m/s NOT 19 M/S
*October 31, 2015*

**AP PHYSICS HELP**

a ball 1 is thrown horizontally from the top of a building that is 50 meters tall. if another ball 2 is dropped at the same time as the first is released, which ball will hit the ground first? A. ball 1 B. ball 2 c. they land at the same D. depends of the initial velocity of ...
*October 31, 2015*

**AP PHYSICS HELP**

A diver runs horizontally with a speed of 1.5 m/s off a platform that is 20 m above the water. what is his speed just before hitting the ground?
*October 31, 2015*

**Chemistry**

A weather balloon is inflated to a volume of 29.9 L at a pressure of 755 mmHg and a temperature of 33.0 ∘C. The balloon rises in the atmosphere to an altitude where the pressure is 385 mmHg and the temperature is -16.2 ∘C. Assuming the balloon can freely expand, ...
*October 31, 2015*

**math**

In a parallelogram ABCD,if DO and CO bisect angle D and angle C respectively, what will be the value of angle DOC
*October 31, 2015*

**Algebra 2**

from (3t+1)^2≤0 it should be intuitively obvious that anything squared cannot be less zero So the only case possible is 3t=0 t=-1/3 , that is, when the equality holds true
*October 30, 2015*

**Physics**

A helicopter is flying horizontally at a constant 40 m/s when it drops a package below. Where does it land? 1. About 50 m ahead of the helicopter 2. About 80 m behind the helicopter 3. There is no way to answer without knowing how high the helicopter was above the ground when ...
*October 30, 2015*