Questions Asked on
July 6, 2010

chemistry
Calculate the pH for each of the following solutions: (a) 0.10 M NH3 (b) 0.050 M C5H5N (pyridine)
asked by G 
Physics
A stone is shown at rest on the ground. A. The vector shows the weight of the stone. Complete the vector diagram showing another vector that results in zero net force on the stone. B. What is the conventional name of the vector you have drawn?
asked by Anonymous 
chemistry
thanks Dr.Bob, I got that question. I also have another question that I am having trouble on. I am being asked to arrange the oxides in each of the following groups in order of increasing basicity: (a) K2O, Al2O3, BaO (b) CrO3, CrO, Cr2O3 I know the
asked by G 
Science  Physics
A meter stick is balanced at the 50cm mark. You tie a 20N weight at the 20cm mark. At which mark should a 30N weight be placed so that the meter stick will again be balanced?
asked by Jen 
Physics
"An airplane is climbing at an angle of 15 degrees to the horizontal with the sun directly overhead. The shadow of the airplane is observed to be moving across the ground at 200 km/h. How long does it take for the plane to increase its altitude by 1000 m"?
asked by Stuck 
business law
Ruth carelessly parks her car on a steep hill, leaving the car in neutral and failing to engage the parking brake. The car roles down the hill, knocking down an electric line. The sparks from the broken line ignites a grass fire. The fire spreads until it
asked by Kristy 
Phosphorus cycle
Explain how the phosphorus cycle differs from the carbon cycle. The phosphorus cycle differs from the carbon cycle by the phosphorus being an essential element in molecules which carries energy to plant and animal cells. The phosphorus helps plants with
asked by Amanda 
chemistry
Rolaids consumes 47 times its weight in excess stomach acid. Can this be tested using quantitative measurements?
asked by wesley 
Economics  Please Help
Suppose the economy has been producing its potential, but it is now experiencing a recession. Which of the following is a discretionary fiscal policy that would bring the economy closer to its potential output? Check all that apply. 1) A tax cut 2) A tax
asked by BC 
Physics
A force vector F of magnitude 12N is applied to a FedEx box of mass m2=1kg. The force is directed up a plane tilted by theta=37 degrees. The box is connected by a cord to a UPS box of mass m1=3kg on the floor. The floor, plane, and pulley are frictionless,
asked by Rick 
Allied Health
What is a doctor’s responsibility if a patient requests restrictions on the use of his or her PHI? A. The doctor must comply with the patient’s wishes. B. The doctor need not comply with the patient’s wishes if HIPAA would otherwise permit
asked by Jessica 
Physics
A 4.0µC charge is located 0.30 m to the left of a +6.0µC charge. What is the magnitude and direction of the electrostatic force on the positive charge?
asked by Marie 
Nitrogen cycle
explain how the phosphorus cycle differs from the nitrogen cycle. The phosphorus cycle does not exist in a gaseous state and does not enter in the atmosphere. It cycles from land to sedimants in the ocean and back to land. The nitrogen cycle exists is a
asked by Amanda 
geometry
A pizza is cut into 10 equal slices. What is the measure of each central angle (the part first eaten)?
asked by zacarra 
Chemistry
Uranium hexafloride is a solid at room temperature, but it boils at 56C. Determine the density of uranium hexafloride at 60C and 745 Torr.
asked by Victoria 
Carbon
#1 where and in what form does carbon enter long term stores? It enters longterm stores in the form of Carbon dioxide, and is found in intermediate and deep ocean waters. On land, it is found in coaldeposits and in oil and gas deposits. #2 where and in
asked by Amanda 
CHEMISTRY (WEBWORK)
SPARTAN. Which atom (a, b, c, d, e, f, g, h) in the haloacetic acid below has the maximum electrostatic potential? i cant copy the picture A. a B. b C. c D. d E. e F. f G. g H. h we all know we have the same one... just whats the answer????
asked by Anonymous 
algebra II
Suppose a car door lock has a fivebutton keypad. Each of the buttons includes two digits. How many different fivebutton patters are possible?? (Hint: Each button can be used more than once.)
asked by Lola 
Example of Carbon
Give an example in which carbon moves from the abiotic to the biotic part of an ecosystem. An example which shows that carbon moves from the abiotic to the biotic part of an ecosystem is it being in the atmosphere and getting removed by producers which
asked by Amanda 
geometry
Which is the area of a circle with a circumference of 37.68 units? (use 3.14 for pi)
asked by Superman 
Food Web
A food web contains green plants, rebbts, squirrels, mice, seedeating birds, hawks, and owls. Which organisms in this food web would contain the greatest biomass? Explain KK. I don't know how to do this. I think that the green plants would contain the
asked by Amanda 
chemistry
4.The Kb of ammonia, NH3, is 1.8x10^5. What is the pH of a 2.000 millimolar solution of ammonia , to 3 significant digits.
asked by Samantha 
physics 2
The electric field across a cellular membrane is 1.0x10^7 N/C directed into the cell. What is the magnitude of the electric forse on the sodium ion flowing into the cell? The charge on the sodium ion is +e.
asked by mrs. austin 
English
What are examples of Irresponsible Persuasion? Other than peer pressure
asked by Jr. 
advanced math
A train traveling at 460 watts from England by the circumference of the city of Wisconsin Rapids terminating an airspeed to ground rate ratio.In what city in France will the trains collide?
asked by Alan Zamora 
Government Check
What is the primary claim made by those who oppose hate crimes legislation? a)There is no way to catch all perpetrators of hate crimes, so all perpetrators should be punished equally. =b)There is no way to determine the motivations behind a crime, so all
asked by Ariel 
economics
If chocolate is found to have positive health benefits, would this lead to a shift in the demand curve or a movement along the demand curve
asked by Anonymous 
Math 115
Is the following set of numbers a perfect triple? 8, 10, 12. (2)Add 3/5+(8/35) (3).Which of the following are not like terms? (A)2b and 2b,(B)3c and 2c,(C)2b and 3b,(D)2b and 2c. Which number shown in parentheses is a soultion of the given equation?
asked by Jerome 
PHL 251
describe the role of critical thinking and language/language diversity in persuasion.
asked by Denise 
surveying
how to solve for radius of horizontal curve with coordinates(NE) for points A,B, C on the curve
asked by Stacey Graham 
AP Biology for Kate, etc.
To save your looking for these AP Biology sites, I now have ready: AP Central, AP Fees, Study Tips, Reviews, TestTaking Tips, Practice Quizzes, Sample AP Bio Tests & Scoring Guidelines and books either to purchase or to find in a library. Just let me know
asked by SraJMcGin 
Shelled marine organisms
How do the shelled marine organisms contribute to the carbon cycle? They contribute to the carbon cycle by releasing carbon dioxide back into the atmosphere by converting carbohydrates and oxygen into carbon dioxide and water.
asked by Amanda 
chemistry
how many moles of HCl are needed to react with 2.3 moles of Zn in the following reaction? 2HCl + Zn > ZnCl2 + H2
asked by Anonymous 
math
Calculate the volume of a sphere with a radius of 4.0 cm. Use pi=3.14 in your calculations. Assume the units are cm3 and do not include them in your answer. Round your answer to the nearest tenth.
asked by moe 
General knowledge
You are trapped in a room with two doors. One is to death and other lds to freedom. You don't know whic 1. There are two robots guarding the doors. They will let you choose one door but upon doing so you must go through it.You can, however, ask one robot
asked by evaa 
algebra
please explaing reversing the digits. Find the product of 2 two digit numbers and reverse the digits and find the product. The products are the same. Does this happen with any pair of twodigit numbers? Eplain your thinking in solving this problem and
asked by Robin 
Math
Use a table of values of f(x) to estimate the value of the limit to four decimal places. lim_(x>infinity)(sqrt(2 x^2 + 4 x + 1)  sqrt(2 x^2 + 2 x + 7)) 1
asked by Stella 
chemistry
2.Glycolic acid is often used in “facial peels” and has a Ka of 1.5x10^4. If a movie star is to have a solution of pH 2.1 applied to her face at night, what concentration of glycolic acid solution should be made up (assuming that it is a monoprotic
asked by GWM 
chemistry
1.0 mol of nitrogen oxide NO and 1.0 mol of oxygen were mixed in a container and heated to 450 oC. At equilibrium the number of moles of oxygen was found to be 0.70 mol. The total pressure in the vessel was 4.0 atm. Calculate the value of Kp for the
asked by jemy 
Math
If 7y+9 represents an odd integer, which of the following represents the next smallest odd integer? a. 7(y2)+1 b. 7(y2) c. 7(y+3) d. 7(y+2) e. 7(y+1)
asked by Anna 
surveying
how to solve for radius of horizontal curve with coordinates(NE) for points A,B, C on the curve Point A : N1405.4018 E1256.7569 Point B : N1283.3703 E1294.7027 Point C : N1225.9373 E1286.6137
asked by Stacey Graham 
Cycle question
Is rock cycle also known as the phosphorus cycle? They are the same thing I'm guessing.
asked by Amanda 
Algebra
Hi, here is a question and my answer I have done so far, not sure about the end result so any help appreciated 5a2 (5+4a)=9 Multiply out brackets 5a10+8a =9 Add 10, 5a+8a=1 Collect like terms 13a = 9 Divide by 13 = a =1/13 I am pretty sure the answer
asked by Sam 
MATH
IF XYZ AUTO CO SOLD 23,000 VEHICLES IN 1999, HOW MANY WERE SUV'S? IF 7,650 TRUCKS WERE SOLD IN 1999,HOW MANY TOTAL VEHICLES WERE SOLD IN 1999? IF 3,750 2DR CARS WERE SOLD IN 1999, THEN HOW MANY 4DR CARS WERE SOLD IN 1999? THE FOLLOWING INFO APPEARED IN A
asked by ANNA 
Math 115
I need some help on 2 anwers 1)is the following set of numbers a perfect triple? 8, 10,and 12. 2)Which pair of fractions is proportional (A)0.6/0.3=?3/18,(B)0.6/0.3=?2.4,(C)0.6/0.3=?2.4/1.8, (D)0.6/0.3=?3/15
asked by Jerome 
chemistry
How many grams of ammonia are formed when 1.34 grams of nitrogen react with an excess of hydrogen(3 H2 + N2 reacts to form 2 NH3)(Answer to tenths ex. 2.5)?
asked by derek 
allied health
I want to say D. Not sure here Which of the following is true in regard to limited data sets? A. Patients must authorize the use of limited data sets. B. Those who receive limited data sets can pass them on without restrictions. C. Limited data sets
asked by james 
math
if n is an integer and 3
asked by Julie 
mat 101
What would my balance be if I had $100 in a savings account that had a 2% interest rate and I kept the account for a 5 year period, using continuos compounding?
asked by keith 
Products formed
what are the products formed as a result of nitrification. What about dentrificiation. Nitrification = Nitrate Dentrification = Nitrogen gas
asked by Amanda 
English
Create a Topic Sentence where the blank space is. __________________________________________________________________. The goal of the Web Privacy Project is to make it simple for users to learn the privacy practices of a Web site and thereby decide whether
asked by Jr. 
Math 115
How do perform the indicated operation.15/1313/15
asked by Jerome 
math
Victoria has two tea sets that are similar in size. The larger teapot is 12in tall and 6in wide. if the smaller teapot is 8in tall, how wide is it?
asked by Tiffany 
math check answer
Solve by elimination method 3x  6y =4 3x  6y =5 is the answer x=9 and I think it is inconsistant and not consistant
asked by Christy 
algebra
ms.sue, how would you solve the squareroot of two manually, without a calculator?
asked by Alisa 
geometry
in triangle abc angle b is 3 times angle a and angle c is 8degrees less than 6 times angle a?
asked by dj 
Nitrogen Cycle
KK I know that the Nitrogen cycle is the way that nitrogen in nature is changed into many different forms that are used by living organisms, but I have to explain how the phosphorus cycle differs from that cycle, and I don't know about that. Is it possible
asked by Amanda 
professiona education
how good is a test?
asked by michelle 
algebra
media service charges $20 for a phone and $30/month for its economy plan. The equation C =30t + 20 decribes the total cost, C of operating a media service phone for t months. The total cost for two months of srvice is $_______.? If a customer has oly 90
asked by Jim 
chemistry
3.The solubility product for silver (I) chloride is 1.6x10^10 while that for sliver (I) iodide is 8.5x10^17. Suppose 5g of AgCl is put in a liter of 0.1M sodium iodide solution. If a solid is eventually isolated, what is it, and how did it form?
asked by Cindy 
physics
a man walks 12 m due noth , 4 m due east and finally climbs up a vertical pole up to a height of 3 m . find his displacement.
asked by rucha 
Physics
A stone is shown at rest on the ground. A. The vector shows the weight of the stone. Complete the vector diagram showing another vector that results in zero net force on the stone. B. What is the conventional name of the vector you have drawn?
asked by Anonymous 
Physics
A stone is shown at rest on the ground. A. The vector shows the weight of the stone. Complete the vector diagram showing another vector that results in zero net force on the stone. B. What is the conventional name of the vector you have drawn?
asked by Anonymous 
Maths
Hi, I have a formula for modelling the variation in population density in terms of distance from a town centre; y= 3x^2 +6x+9 where y represents the population density (in thousands per km^2) and x represents the distance (in km) from the town centre I
asked by Mario 
Production and Operations management
A ball bearing assembly firm wants to set up an assembly line which must have an output of 60 units per hour. The work elements are A to J and the task times are 40, 30, 50, 40, 6, 25, 15, 20, 18 and 30 seconds respectively. a. Determine the cycle time
asked by Special 
law
I am a bit confused about this question, can someone help please! What is unusual about a case involving res ipsa loquitor? A. The defendant assumes the burden of proof. B. The injury is usually caused by the plaintiff. C. An injury results even though no
asked by linda 
Physics
I have two different questions I can't figure out. 1) Projectile motion: At what initial speed must the basketball player throw the ball at an angle of 55 degrees above the horizontal, to make the foul shot? The horizontal distance from the ball to the
asked by Pat 
business law
The state legislature where Brighton was governor passed a statute giving him the power to nullify the Bill of Rights of the U.S. Constitution. Brighton exercised this power by eliminating the First Amendment. He then shut down all state newspapers that
asked by Kristy 
Algebra
Explain why x^2 +5x + 8 is prime(not factorable) How do you know? Give 2 examples of a prime polynomial(can't be both binomials) Give 2 examples of polynomials that are not prime(they can't be both binomials),factor them,explain what you did to factor
asked by Jaz 
Chemistry
0.37 moles of xenon gas (Xe) are captured in a 1.0L container at 25 degrees celcius. Given the van der Waals constants for Xe, calculate the pressure of Xe gas inside the container?
asked by Jordan 
Algebra
decide whether the pair of lines are parallel,perpendcular, or neither. 4x + y = 8 3y  4y = 10
asked by Fred 
English Literature
I need to write an essay about The Iliad and compare and contrast it to the current war on terror. Do you know any references I can research to help write my paper. Thanks, Michelle
asked by Michelle 
Algebra
In 1991, the life expectancy of males in ceetain country's was 73.3 years. n 1996, it was 75.8 years. Let E represent the life expectancy in year t and let t reprsent the number of years since 1991. The linear !@#$%^&tion E(t) that fits the data is E(t)=
asked by Kin 
math
11.6% make it a fraction and a decimal
asked by sue 
business
which economic system is the best solution to handling a crisis of epic proportion
asked by nino 
chemistry
The pKa for hydrochloric acid is −6.0. What is the concentration of HCl(aq) we would expect to find in a 1 M solution of hydrochloric acid? What pH would we expect? how do you solve this problem?
asked by Jin 
chemistry
Which reactants in the reactions below are acting as Br©ªnstedLowry bases? NH4 +(aq) + OH−(aq) NH3(aq) + H2O(l) H2PO4 −(aq) + H2O(l) H3O+(aq) + HPO4 2−(aq) is the answer H2O and the H3O+
asked by Jin 
chemistry
A weak monoprotic acid was calculated, using the usual formula for Ka, to give a pH of 7.4 at a certain concentration. The student who did the calculation was puzzled. What would you advice him/her to do?
asked by Robert 
chemistry
Why is it that biochemists often remember the pKa of weak acids, rather than Ka?
asked by Juan 
chemistry
If we suppose that Kw = 1.0x10^14 at 25C, would it be larger or smaller at 100C? What is the value of K for the reaction 8H + 8OH = 8H2O at 25C? Would this value be smaller, or larger, at 100C?
asked by Juan 
10th grade
i want to make an project on safer construction practises for tsunami only want 10questions on this topic
asked by saima 
simple interest rate
Need simple interest rate (rounded to hundreths) on a loan of $3500 which in two months the maturity value was $3583. What is the formula to figure this problem?
asked by Lisa 
math
if it takes 8 quarts of ice cream to feed 30 people, how many quarts will it take to feed 75 people?
asked by Tiffany 
math
Victoria has 2 tea sets that are similar in size. the larger teapot is 12in tall and 6in wide. if the smaller teapot is 8in tall, how wide is it
asked by Tiffany 
Health
I Feel its B. Or D. Trcky question According to the AMA, what is a key reason behind a physician’s duty of confidentiality to a patient? A. The U.S. Constitution requires a physician’s confidentiality. B. The patient will feel more confident in
asked by cindy 
Health
This can be C. OR D. couldn't it be? A second hand statement? Dang! or even B. Keep running this through my head Which one of the following statements is an example of hearsay? A. I saw the doctor administer the injection. B. I checked the patient’s
asked by Jessica 
math
8/30=x/75 solve for x
asked by Tiffany 
UA Flight 93
Imagine if Flight 93 landed safely on the ground during Sep. 11. What would have happened to the passengers and hijackers?
asked by AL 92 
algebra
How do you convert the squareroot of 2 into a decimal? The question states:"write the numbers in increasing order" The numbers are 1,1/3,and square root of 2. Thanks for your help!
asked by Alisa 
Math
9ft^2/1yd^2=300ft^2/x
asked by Arlene 
Math
How do you find factors of a number?
asked by Mary 
mathalgebra please help
The line y=0.15x+0.79 represents an estimate of the average cost of gasoline each year. The line 0.11xy=0.85 estimates the price of gasoline in January of each year (“Consumer price index,” 2006). a. Do you expect the lines to be intersecting,
asked by Michelle 
math
which is equivalent to 1/4 of 1%? a. 0.000025 b. 0.00025 c. 0.0025
asked by Julie 
math
if (2 x 10^2) + (3 x 10^3) = n x 10^3, what is the value of n? how did you find n?
asked by Julie 
Mechanics
If an object weighs 39.2 N on Earth, what is its mass?
asked by Anonymous 
algebra
soilbean meal is 18% protein, cornemeal is 9% protein ow many pounds o each should be mixed together in oder to get 360lbs. mixture that is 14 protein? How pounds of cornmeal do you need and how many pounds of soybean do you need?
asked by Louren 
English
What do you think was Lance Armstrongs purpose in writing his book Its Not About The Bike?
asked by Luke 
alg
Which expression represents the sum of the following? (5)/ (2t + 1) + (1) / (4t^2 + 4t + 1) a) 10t + 4 / (2t + 1)^2 b) 4 / (2t + 1)^3 c) 4 / 4t^2 + 6t + 2 d) 10t + 1 / (2t + 1)^2
asked by sean 
math
8/2=12/x what does x equal?
asked by Tiffany 
Government Check
Which Amendment extended voting rights to women? 19th
asked by Ariel 
geometry
Which is the area of a circle with a radius of 5 units? (use 3.14 for ) answer in square units.
asked by Superman 
physics
how is Gauss's Law use in determining the electric field anywhere around a point charge and how is this related to Coulomb's law?
asked by alex 
college
Primitive air consists of 58% H2O 32% CO2 10% N2 so how many grams of primitive air do you need to react with 1 gram of H2?
asked by John 
Economics
With the new UK emregncy budget what are the advanatages and disadvantages of decreasing the corporation tax?
asked by Lily 
Math
I can not get a handle on this one. Jerome is 66 inches tall, what weights will keep his BMI between 1827 ? I= 700w/h2 I think the answer is 111.96
asked by Christy 
205
2. Discussion Question 1 • Due Date: Day 2 (Main forum) • View the Vacuum Sales digital story located on the Materials tab of your student Web site for Week Six. Of the two arguments provided in the digital story, which is valid and which is sound?
asked by axia