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Questions Asked on November 23, 2010

what is the cation and anion of Na3PO4?thanks
1. 3 answers
2. asked by rebekah
3. 8,593 views
A water tank has a shape of an inverted circular cone with base radius 3 m and height of 5 m. If the water is being pumped into
1. 1 answer
2. asked by Jay
3. 7,070 views
a 3.5 kg block is accelerated from rest by a compressed spring of spring constant 640 N/m. The block leaves the spring at the
1. 4 answers
2. asked by help
3. 6,481 views
The pH of a 0.55-M aqueous solution of hypobromous acid, HBrO, at 25°C is 4.48. What is the value of Ka for HBrO?how do you
1. 2 answers
2. asked by jessica
3. 6,214 views
If the mass percentage of water in FeSO4 X H20 is 45.3%, find the number x?
1. 1 answer
2. asked by Azur
3. 5,094 views
The pH of a solution prepared by mixing 45 mL of 0.183 M KOH and 65 mL of 0.145 M HCl isi solved it but my answer is wrong. the
1. 2 answers
2. asked by ben
3. 5,081 views
For propanoic acid (HC3H5O2, Ka = 1.3 10-5), determine the concentration of all species present, the pH, and the percent
1. 2 answers
2. asked by AMANDIP
3. 4,670 views
A 20g plastic ball is moving to the left at 30 m/s. How much work must be done th cause the ball to move to the right at 30 m/s?
1. 2 answers
2. asked by nathan
3. 4,665 views
A uniform piece of wire, 30 cm long, is bent in the center to give it an L-shape. How far from the bend is the center of mass?I
1. 1 answer
2. asked by Avalon
3. 4,409 views
A battery of three cells in series each of emf 2v and internal 0.5 ohms is connected to 2ohms resistor in series with a parallel
1. 9 answers
2. asked by Emmanuel
3. 4,291 views
The Ka of hypochlorous acid (HClO) is 3.0 × 10-8 at 25°C. Calculate the pH of a 0.0385-M hypochlorous acid solution?i got help
1. 3 answers
2. asked by jessica
3. 3,583 views
calculate the weight of crystal formed on cooling 80 gm of saturated solution from 60 degree Celsius to 30 degree Celsius.
1. 2 answers
2. asked by hey
3. 3,443 views
The solubility of lead (II) chloride (PbCl2) is 1.6 x 10^-2 M. What is the Ksp of PbCl2?
1. 1 answer
2. asked by jack
3. 3,015 views
how do i know what the ions present are of this formula:Na3PO4 what are the anions and what are the cations? how do you know
1. 10 answers
2. asked by hannah
3. 2,935 views
Find the radius of a circle with an area of pi(16x^2+24x+9)
1. 1 answer
2. asked by Kristina
3. 2,884 views
Suppose with 200 N of force applied horizontally to your 1500 N refrigerator that is slides across your kitchen floor at a
1. 5 answers
2. asked by Mike
3. 2,795 views
If the ball is released from rest at a height of 0.71 above the bottom of the track on the no-slip side, what is its angular
1. 1 answer
2. asked by Ree
3. 2,712 views
Pharmaceutical drugs have an inelastic demand, and computers have an elastic demand. Suppose that technological advance doubles
1. 4 answers
2. asked by Rob
3. 2,377 views
If the reaction Fe2N(s) + 3/2H2(g) -> 2Fe(s) +NH3(g) comes to equilibrium at a total pressure of 1 bar, analysis of the gas
1. 2 answers
2. asked by Katie
3. 2,289 views
Sodium phosphate reacts with copper (II) chloride in a precipitationreaction. What mass (in grams) of the precipitate will form
1. 1 answer
2. asked by Heather
3. 2,125 views
A cylinder contains 3.5 L of oxygen at 350 K and 2.5 atm . The gas is heated, causing a piston in the cylinder to move outward.
1. 3 answers
2. asked by Isabel-A
3. 2,059 views
A load of 54 N attached to a spring hanging vertically stretches the spring 4.9 cm. The spring is now placed horizontally on a
1. 1 answer
2. asked by Kristen
3. 1,959 views
At what speed do a bicycle and its rider, with a combined mass of 100 kg, have the same momentum as a 1400 car traveling at 6.0
1. 1 answer
2. asked by Anonymous
3. 1,950 views
In "It Can't Be Helped," why does Mama destroy her dishes?a)She does not like the pattern on the dishes, which are chipped
1. 7 answers
2. asked by Harry
3. 1,937 views
what is the greatest common factor (GCF) of 25 ; 50
1. 7 answers
2. asked by karol <3
3. 1,882 views
The pH of a solution prepared by mixing 45 mL of 0.183 M KOH and 65 mL of 0.145 M HCl is ?.
1. 2 answers
2. asked by ben
3. 1,855 views
The average math SAT score is 500 with a standard deviation of 100. A particular high school claims that its students have
1. 1 answer
2. asked by Nancy
3. 1,798 views
Which planet by itself contains the majority of mass of all the planets?saturn jupiter uranus venus earth
1. 4 answers
2. asked by sammie
3. 1,696 views
X rays of wavelength 2.63 were used to analyze a crystal. The angle of first-order diffraction (n = 1 in the Bragg equation) was
1. 3 answers
2. asked by kay
3. 1,635 views
A confidence interval was used to estimate the proportion of statistics students that are females. A random sample of 72
1. 2 answers
2. asked by Anonymous
3. 1,618 views
Does your organization address ethical issues in a formal and systematic way? If so, is it a cookie-cutter, one-size-fits-all
1. 5 answers
2. asked by bob
3. 1,605 views
The acid-dissociation constant, Ka, for gallic acid is 4.57 × 10-3. What is the base-dissociation constant, Kb, for gallate
1. 1 answer
2. asked by jessica
3. 1,593 views
In traveling across flat land, you notice a mountain in front of you. Its angle of elevation to the peak is 3.5 degrees. After
1. 3 answers
2. asked by Ashley
3. 1,525 views
You have 150 ml of a solution of benzoic acid in water estimated to contain about 5 g of acid. The distribution coefficient of
1. 1 answer
2. asked by Nat
3. 1,523 views
A goat is tethered to a stake in the ground with a 5 m rope. The goat can graze to the full length of the rope a fulll 360
1. 2 answers
2. asked by Ashley
3. 1,511 views
Pharmaceutical drugs have an inelastic demand, and computers have an elastic demand. Suppose that technological advance doubles
1. 1 answer
2. asked by Rob
3. 1,489 views
Consider the polynomial f(x) = 3x3 – 2x2 – 7x – 2.(a) By using the Rational Zero Theorem, list all possible rational zeros
1. 1 answer
2. asked by Alg help
3. 1,477 views
Two children hang by their hands from the same tree branch. The branch is straight, and grows out from the tree trunk at an
1. 2 answers
2. asked by michelle
3. 1,433 views
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
1. 2 answers
2. asked by Brad
3. 1,388 views
In a device known as an Atwood machine, two masses m1=10kg and m2=20kg are connected by rope over a frictionless pulley. What is
1. 0 answers
2. asked by Mike
3. 1,333 views
5. Esas camisetas, ¿son de ustedes?Your response: Sí, son suyos Points earned: 0 out of 1 6. Esos sombreros de playa, ¿son de
1. 3 answers
2. asked by AYUDA ME PORFAVOR!! :)
3. 1,324 views
An 8.00 g bullet is fired into a 250 g block that is initially at rest at the edge of a table of 1.00 m height. The bullet
1. 2 answers
2. asked by kaitlyn
3. 1,299 views
Which one supports the solar nebula theory of the origin of the solar system?a.Disks are rare around young stars. b.Disks are
1. 1 answer
2. asked by Stephanie
3. 1,273 views
An object is heated to 90 degrees Celcius and is then allowed to cool in a room whose air temperature is 25 degrees celcius. If
1. 2 answers
2. asked by Hannah
3. 1,237 views
A string of length l carries a small pulley C from which is suspended a load W. The string hangs between two vertical walls
1. 1 answer
2. asked by ACD
3. 1,219 views
Calculate the value of [H3O+] in a 0.01 M HOBr solution. Ka = 2.5E-9I'm having a problem with just writing the equilibrium
1. 2 answers
2. asked by Audrey
3. 1,191 views
identify at least four key milestones in the development of cognitive psychology as a discipline
1. 2 answers
2. asked by sam
3. 1,190 views
If the system below is at equilibrium in a closed vessel and a small amount of nitrous acid [HNO2(§¤)] is added, what would be
1. 1 answer
2. asked by jackie
3. 1,178 views
Please let me know how I am doing with the following three chemistry questions.1.A sample of a gas in thermometer has a volume
1. 1 answer
2. asked by Cliff
3. 1,177 views
when a 8.77g mixture of methane, and ethane is burned in oxygen at constant pressure, 476.6kJ of heat is liberated. What is the
1. 0 answers
2. asked by Anonymous
3. 1,175 views
a 1 kg dart moving horizntally at 10 m/s sticks to a wood block of mass 9 kg which slides across a friction free level surface.
1. 3 answers
2. asked by lisa
3. 1,175 views
when a solution prepared by dissolving 4.00g of an unknown monoprotic acid in 1.00L of water is titrated with 0.600M NaOH,
1. 1 answer
2. asked by Ksolo
3. 1,173 views
Certain experiences can mark the beginings of maturity:1. getting your first job a) b) c) 2. graduating from high school a)
1. 1 answer
2. asked by NeedHelp?
3. 1,162 views
1.A firetruck is traveling at a velocity of +20 m/s in the x direction. As the truck passes x=63m it shoots a tennis ball
1. 1 answer
2. asked by sandhu
3. 1,142 views
A mixture of 2.0 mol H2 and 1.0 mol of O2 is placed in a sealed evacuated container made of a perfect insulating material at
1. 1 answer
2. asked by John
3. 1,135 views
jim, standing at one focus of a whispering gallery, is 6 feet from the nearest wall. his friend is standing at the other focus,
1. 1 answer
2. asked by anonymous
3. 1,125 views
A hydrogen-like ion is an ion containing only one electron. The energy of the electron in a hydrogen-like ion is given by:En=-(2
1. 5 answers
2. asked by Anonymous
3. 1,121 views
when 12.76mL of HCl of unknown concentration (but less than the base) are reacted with 15mL of 3.254M NaOH, 1.68kJ of heat are
1. 5 answers
2. asked by serena
3. 1,107 views
Pharmaceutical drugs have an inelastic demand, and computers have an elastic demand. Suppose that technological advance doubles
1. 1 answer
2. asked by Rob
3. 1,098 views
A force of 200 N is being exerted on a blocki, which has a mass of 10 kg and is on 30 degrees inclined plane. The force is
1. 1 answer
2. asked by rhet butler
3. 1,093 views
what is the pH of a solution that is .15 M in HOCl and .25 M NaOCl after .05 mol HCl/L has been bubbled into the solution?this
1. 1 answer
2. asked by Audrey
3. 1,088 views
For a certain transverse wave, the distance between two successive crests is 1.89 m, and 5 crests pass a given point along the
1. 1 answer
2. asked by Pete
3. 1,085 views
What is the concentration (in M) of hydroxide ions in a solution at 25°C with pH = 4.282?
1. 1 answer
2. asked by ben
3. 1,074 views
Meka plans to bake a large circular cookies for her brothers. She wants to decorate the outer edge of the cookie small pieces of
1. 1 answer
2. asked by Bill
3. 1,021 views
all of the following are examples of thenonlegislative powers of Congress except
1. 3 answers
2. asked by Anonymous
3. 1,018 views
Which of the following statements regarding TERM insurance is true ?A. It provides temporary protection B. It builds up cash
1. 0 answers
2. asked by Insurance Problem
3. 1,000 views
A force of 50 N directed 30 degrees above the hoizontal is applied to a 10-kg block at rest on a rough horizontal surface. What
1. 0 answers
2. asked by Heather
3. 981 views
From the perspective of a healthcare administrator of any type of healthcare organization, who oversees human resource benefits,
1. 0 answers
2. asked by Delo
3. 972 views
In dealing with affirmative action, the Supreme Court has:A. been clear in rejecting the concept. B. been clear in its
1. 4 answers
2. asked by anthony
3. 966 views
A snapshot graph of a travelling wave is shown. The wave is travelling to the right at 50.0 m/s. What is the amplitude if the
1. 1 answer
2. asked by Bala
3. 964 views
1. Why does the inequality sign change when both sides of the inequality are multiplied or divided by a negative number? Does
1. 1 answer
2. asked by TRACY
3. 962 views
How might a novice confuse the following advance directives within the Patient-Self Determination Act when distinguishing
1. 1 answer
2. asked by HCR 210
3. 939 views
Prove :cosx-cosy= -2sin(x+y/2)sin(x-y/2)Prove: 2cot-2tanx= 4-2sec^2x / tanx
1. 1 answer
2. asked by Sarah
3. 934 views
Find the percent. Round to the nearest whole percent.159 people in favor out of 350 people surveyed.
1. 1 answer
2. asked by nikkie
3. 928 views
1.A firetruck is traveling at a velocity of +20 m/s in the x direction. As the truck passes x=63m it shoots a tennis ball
1. 0 answers
2. asked by sandhu
3. 922 views
A 50-kg block is at rest on a 15 degree slope. A force of 250 N is acting on the block up the slope parallel to it. If the block
1. 1 answer
2. asked by Brooke
3. 919 views
an angle's measure is twice the measure of its complement. The larger angle is how many degrees greater then the smaller angle?
1. 2 answers
2. asked by Janelle
3. 910 views
IN A CLASS 3 OUT OF EVERY 7 STUDENT ARE MALES IF THERE ARE 27 MALES HOW MANY STUDENT ARE IN THE CLASS
1. 1 answer
2. asked by TIFFANY
3. 874 views
· Write a 700- to 1,050-word response, on the determining factors of gender identification and gender roles. Include the
1. 7 answers
2. asked by Jackie
3. 871 views
I have to write an essay on the chloera of haiti. For my intro, I have to write explain the subject and why it's important. I
1. 2 answers
2. asked by jenny
3. 868 views
A horizontal force of 25 newtons pushes a box a distance of 30 meters across the floor. How much work is done by the force?
1. 1 answer
2. asked by stephanie
3. 852 views
HELP ME UNSCRAMBLE THESE LETTERSPAMOUSEEN please
1. 6 answers
2. asked by sarah
3. 850 views
A very strong girl runs 200 miles east for several hours. After a brief rest she runs another 100 miles north. She stops for the
1. 1 answer
2. asked by Kevin
3. 847 views
you have 100 mL of a saturated solution of Pb(NO3)2 at 0 degrees celsius. If the solution is evaporated to dryness how many
1. 1 answer
2. asked by keri
3. 830 views
I need major help im not understanding this at all:Complete and balance each of the following equations for acid-base reactions.
1. 1 answer
2. asked by hannah
3. 827 views
How do i solve this half reaction with Mg(OH)2(s) --> Mg(s)?Complete and balance the displayed half reaction in basic aqueous
1. 1 answer
2. asked by Confused
3. 824 views
Is it possible for a triangle to have sides with the following lengths: 5, 9, 15?
1. 6 answers
2. asked by Molly
3. 824 views
A rock tied to a string is swung around in a circle with a radius of 10 ft. The centripetal acceleration is 16.9 ft/sec2.
1. 1 answer
2. asked by drake
3. 823 views
The given reaction,cyclopropane propene (isomerization), follows first-order kinetics. The half-live was found to be 4.57 min at
1. 1 answer
2. asked by bobjahng2
3. 820 views
A gas has a volume of 4.00 at 0. What final temperature in degrees Celsius is needed to cause the volume of the gas to change to
1. 1 answer
2. asked by Brittany
3. 811 views
if you unscramblethe letters SATLEIVER what word do u get and it has to do with thanksgiving
1. 2 answers
2. asked by BRITTANY
3. 796 views
20.2 mL of 0.234 M FeCl3 is added to 42.5 mL of 0.453 M NaOH. Iron(III) hydroxide precipitates. NaCl remains in aqueous
1. 1 answer
2. asked by Lilly
3. 788 views
I understand the basics of the center of mass, but I'm having a hard time with this wire one:"A uniform piece of wire, 20 cm
1. 0 answers
2. asked by Trisha
3. 786 views
A moving 2.8 kg block collides with a horizontal spring whose spring constant is 215 N/m (see figure). The block compresses the
1. 5 answers
2. asked by help
3. 784 views
Consider the polynomial f(x) = 3x3 – 2x2 – 7x – 2.(a) By using the Rational Zero Theorem, list all possible rational zeros
1. 1 answer
2. asked by Math is hard!
3. 781 views
The asset turnover of a company is 3.2. The total assets are $32,000.00. What were the net sales?
1. 1 answer
2. asked by Mare
3. 761 views
Can 252/1663 be simplified?If it can be simplified, what is the new simplified fraction?
1. 2 answers
2. asked by Maddy
3. 757 views
How many joules of energy are necessary to melt 46.0 grams of ice?
1. 1 answer
2. asked by Cristine
3. 745 views
A 11.0 g bullet is fired horizontally into a 108 g wooden block that is initially at rest on a frictionless horizontal surface
1. 0 answers
2. asked by please help
3. 741 views
Please someone have mercy this is a test grade and I have no idea what to do !A force of 200 N is being exerted on a blocki,
1. 4 answers
2. asked by Tyler
3. 738 views

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