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Questions Asked on March 9, 2010

In a saturated solution of Zn(OH)2 at 25 degrees Celsius the value of [OH-] is 2.0x10^-6M. What is the value of the
1. 4 answers
2. asked by Anonymous
3. 14,296 views
What is the Advantage of Buying a Magnetic Bullein Board
1. 14 answers
2. asked by Zachary
3. 10,136 views
Assume that 30.0 mL of a 0.10 M solution of a weak base B that accepts one proton is titrated with a 0.10 M solution of a
1. 5 answers
2. asked by Sally Perez
3. 7,129 views
when heated, sodium bicarbonate, NaHCO3, decomposes into sodium carbonate, Na2CO3, water, and carbon dioxide. If 5.00 g of
1. 4 answers
2. asked by stocihs hard
3. 5,677 views
The molarity of urea in a solution prepared by dissolving 16 g of urea (MW 60.0g/mol) in 39 g of H2O is ______M. The density of
1. 2 answers
2. asked by CC
3. 5,372 views
Given the equilibrium:HCN(aq) + H2O(l) ←→ H3O+(aq) + CN-(aq) ΔH >0; Ka = 4.0 x10-10 What happens to the concentration of
1. 1 answer
2. asked by Val
3. 5,357 views
The equilibrium constant for the reaction 2NO(g) + O2(g) <--> 2NO2(g) is Kp=1.48x10^4 at 184C. Calculate Kp for 2NO2(g) <-->
1. 2 answers
2. asked by Anonymous
3. 5,133 views
What is the name of NH4CNO?is it ammonium something? Thank you
1. 2 answers
2. asked by emath
3. 4,324 views
The two masses (m1 = 5.0 kg and m2 = 3.0 kg) in the Atwood's machine shown in Figure 10-23 are released from rest, with m1 at a
1. 2 answers
2. asked by Jon
3. 4,128 views
When a ceiling fan rotating with an angular speed of 1.65 rad/s is turned off, a frictional torque of 0.263 N·m slows it to a
1. 1 answer
2. asked by Tory
3. 3,497 views
Suppose a brewery has a filling machine that fills 12 ounce bottles of beer. It is known that the amount of beer poured by this
1. 2 answers
2. asked by Anonymous
3. 3,410 views
You deposit $500 in an account that pays 3% annual interest. Find the balance after 2 years if the interst is compounded with
1. 2 answers
2. asked by Kayla
3. 3,395 views
CO(h20)6 2+ + 4Cl- <=> CoCl4 2- + 6H20What would AgNO3 do when added to this? What is the equilibrium expression?
1. 1 answer
2. asked by Kharris
3. 2,851 views
On January 1, 2009, Sweetwater Furniture Company leased office space under a 21-year operating lease agreement. The contract
1. 3 answers
2. asked by Anoymous
3. 2,733 views
Given the concentration of either hydrogen ion or hydroxide ion, use the ion product constant of water to calculate the
1. 3 answers
2. asked by Laverne
3. 2,726 views
A point moves along the curve y=(x-2)^2 such that the x coordinate is increasing at 2 units per second. At the moment x=1, how
1. 1 answer
2. asked by Cassy
3. 2,531 views
Lead(II) nitrate reacts with potassium iodine to produce lead(II) iodide and Potassium nitrate. If 1.23 mg of lead nitrate are
1. 3 answers
2. asked by stocihs hard
3. 2,514 views
CO(h20)6 2+ + 4Cl- <=> CoCl4 2- + 6H20What would AgNO3 do when added to this? What is the equilibrium expression?
1. 2 answers
2. asked by Kharris
3. 2,469 views
A sample of gas of mass 2.929 g occupies a volume of 426 mL at 0degree Cel and 1.00 atm pressure. What is the molecular weight
1. 4 answers
2. asked by Peter
3. 2,419 views
A galvanic cell consists of La^3+/La half-cell and a standard hydrogen electrode. If the La^3+/La half cell functions as the
1. 1 answer
2. asked by Anonymous
3. 2,403 views
Two point charges, 5.0 µC and -2.0 µC, are placed 5.0 cm apart on the x axis, such that the -2.0 µC charge is at x = 0 and
1. 1 answer
2. asked by Chris
3. 2,149 views
A farmer with 3000 feet of fencing wants to enclose a rectangular plot that borders on a straight highway. If the farmer does
1. 2 answers
2. asked by irma
3. 2,137 views
the area of a rectangle is 100 square inches.the perimeter of the rectangle is 40 inches.a second rectangle has the same area
1. 5 answers
2. asked by faye
3. 2,023 views
Calculate the pH at 298K of solutions having the following ion concentrations?A. [H+]=1.0 x 10^-4M B. [H+]=5.8 X 10^-11M for A
1. 1 answer
2. asked by Anonymous
3. 2,002 views
The solubility of Acetanilide in hot and cold water is:Temperature.........Solubility in 100ml H20 100C....................5.5g
1. 3 answers
2. asked by Natasha
3. 1,996 views
prove:sin(a+b)/cosacosb=tana+tanb
1. 1 answer
2. asked by Sarah Fuller
3. 1,954 views
Homw many grams of copper sulfate pentahydrate (CuSo4 5H2O) would you heat to produce 29.8 g of water?
1. 1 answer
2. asked by Anne
3. 1,819 views
A farmer with 3000 feet wants to enclose a rectangular plot that borders on a straight highway. If the farmer does not fence the
1. 3 answers
2. asked by irma
3. 1,787 views
if line m is parallel to line n and is cut by a transversal and angle 4 =3x - 20 and angle 5 = x + 40, what is the value of x?
1. 1 answer
2. asked by Oscar
3. 1,673 views
The edge of a cube is increasing at a rate of 2 inches per minute. At the instant when the volume is 27 cubic inches, how fast
1. 2 answers
2. asked by Cassy
3. 1,617 views
Three equal charges q form an equilateral triangle of side a. Find the potential at the center of the triangle.Express answer in
1. 1 answer
2. asked by Heather
3. 1,598 views
4. Find the dimensions of the largest isosceles triangle having a perimeter of 18 cm. Answer ( allsides 6 cm) i really need help
1. 1 answer
2. asked by LALA
3. 1,578 views
A 70 kg bicyclist rides his 7.8 kg bicycle with a speed of 14 m/s. How much work must be done by the brakes to bring the bike
1. 1 answer
2. asked by Gracey
3. 1,555 views
Assume you are performing the calibration step of Experiment 8 and you begin with 50 g of water at 20 oC and 50 g of water at 80
1. 5 answers
2. asked by Sam
3. 1,512 views
You raise a bucket of water from the bottom of a deep well. If your power output is 108 W, and the mass of the bucket and the
1. 1 answer
2. asked by Alex
3. 1,487 views
A 1900kg car starts from rest and drives around a flat 56-m-diameter circular track. The forward force provided by the car's
1. 5 answers
2. asked by Kay
3. 1,466 views
I need help, writing a personification poem about big ben. any ideas?
1. 2 answers
2. asked by Shauna
3. 1,424 views
N2O4 --->2NO2a 1 liter flask is charged with .4 mols of N2O4. at equilibrium at 373 k, .0055 mols of N2O4 remain. what is the Kc
1. 2 answers
2. asked by josh
3. 1,402 views
A 0.16-g spider hangs from the middle of the first thread of its future web. The thread makes an angle 7.2* with the horizontal
1. 1 answer
2. asked by Jackson
3. 1,329 views
Could you check these pleasePart 1 Directions: Complete with either e,es,ées, or s. J'ai pris ------- des photos. J'ai envoyé
1. 1 answer
2. asked by Lisa
3. 1,323 views
The two masses (m1 = 5.0 kg and m2 = 3.0 kg) in the Atwood's machine shown in Figure 10-23 are released from rest, with m1 at a
1. 1 answer
2. asked by Mary
3. 1,271 views
what mass of sodium acetate, NaCH3CO2, must be added to 1.0 L of 0.10 M acetic acid to give a solution with a pH of 4.50?
1. 1 answer
2. asked by kim
3. 1,263 views
The perimeter of a rectangle is 76 feet. If the width is doubled and the length is halved, the new rectangle will have a
1. 1 answer
2. asked by Albert
3. 1,231 views
alice is flying a kite. Her hand is three feet above ground level and is holding the end of a 300-foot-long kite, which makes an
1. 2 answers
2. asked by lisa
3. 1,228 views
what does 9E-4 mean? It came up as an answer to a problem i went through on my calculator
1. 1 answer
2. asked by steve
3. 1,223 views
How much heat (in kJ)is required to convert 2.565kg of liquid sulfur dioxide at the boiling point to a gas at 60C?BP of SO2 is
1. 1 answer
2. asked by Staci
3. 1,212 views
For the following reaction at 600. K, the equilibrium constant, Kp is 11.5.PCl5(g) PCl3(g) + Cl2(g) Suppose that 3.314 g of PCl5
1. 1 answer
2. asked by Anonymous
3. 1,211 views
G lies on the perpendicular bisector of segment AB, AG = x2 + 4x, and BG = x + 18. Find AG
1. 2 answers
2. asked by nadia
3. 1,180 views
Calculate the pOH and pH at 298K of solutions having the following ion concentrationsA.[OH-] = 1.0 X 10^-12 B.[OH-] = 1.3 X
1. 2 answers
2. asked by Anonymous
3. 1,167 views
A current I = 16 A is directed along the positive x-axis and perpendicular to a magnetic field. A magnetic force per unit length
1. 1 answer
2. asked by Raul
3. 1,162 views
Can you check the grammar in the following sentences, please?1)The narrator is a voice which (or who?) talks about the story (or
1. 1 answer
2. asked by Franco
3. 1,154 views
BrO3^-(aq)+Sn^2+(aq)+ ____ -->Br^-(aq)+Sn^4+(aq)+ _____H20(l)and H^+(aq) are involved in the reaction. What are the coefficients
1. 1 answer
2. asked by Anonymous
3. 1,127 views
A 72.9 kg man is standing on a frictionless ice surface when he throws a 1.6 kg book at 11 m/s.
1. 1 answer
2. asked by Scott
3. 1,106 views
How do I distinguish between the limiting reactant and excess reactant in a chemical equation?
1. 1 answer
2. asked by Ana
3. 1,097 views
Calculate the mass in atomic mass units of .25 mol of carbon-12 atoms.I don't know how to set it up..
1. 0 answers
2. asked by Lola
3. 1,077 views
How do I distinguish between the limiting reactant and excess reactant in a chemical equation?
1. 1 answer
2. asked by Ana
3. 1,069 views
find the exact value:cos^-1 (square root of 2 divided by 2)
1. 1 answer
2. asked by john 2020
3. 1,049 views
Complete the following:(a) 1400 ft2 = _________ yd2 (b) 1/9 yd3 = _________ ft3 (c) 4.5 lb = _________ oz (d) 32 °C = _________
1. 1 answer
2. asked by tonya
3. 1,042 views
Julio ordered towo pizzas for dinner Friday. Dad ate 3/4 of one pizza, Jenny ate 1/8 of a pizza, Danny ate 1/4 of a pizza, and
1. 3 answers
2. asked by Nina
3. 1,022 views
Determine the pH of 0.18M NH4Cl.
1. 1 answer
2. asked by Katelynn
3. 1,008 views
15)(a) Find 28° 29’ 46” - 16° 48’ 59’’ (b) Express 5.4° in terms of - degrees - minutes - seconds
1. 1 answer
2. asked by Amiyah
3. 991 views
(I did not get some answers correct on this categorizing fallacies assignment. It was graded but not with the correct answers.
1. 1 answer
2. asked by Zoe
3. 979 views
A major goal of a child's transition to a new program is to: a.meet new people b.learn new skills c.meet new teachers d.transfer
1. 1 answer
2. asked by jay
3. 973 views
In the 1800's, what was being used o pull the canal boats?
1. 2 answers
2. asked by Happy Face
3. 969 views
A solid disk rolls along the floor with a constant linear speed v.(a) Find the fraction of its total kinetic energy that is in
1. 2 answers
2. asked by Ace
3. 963 views
which ocean current cools the climate of locations along the northeastern coastline of north america?
1. 1 answer
2. asked by Anonymous
3. 962 views
A line segment has endpoints A=(1,3) and B=(13,19).a) Find the equation of the circle for which the segment AB is a diameter.
1. 2 answers
2. asked by jh
3. 950 views
The science of nutrigenomics helps us to choose the functional foods which best suit your genetic make up What is the link
1. 2 answers
2. asked by adam
3. 948 views
Solve each of the following systems, if possible. Indicate whether the system has a unique solution, infinitely many solutions
1. 1 answer
2. asked by Rebecca
3. 941 views
Calculate the pH of .100M of HClO2.
1. 3 answers
2. asked by Robert
3. 933 views
A student goes to planet x and wants to determine the gravity there. The student knows from physics lab that they can use
1. 1 answer
2. asked by L
3. 928 views
A mixture of He and O2 is placed in a 4.00L flask at 32 degrees Celsius. The partial pressure of the He is 2.7 atm and the
1. 1 answer
2. asked by Fernando
3. 889 views
Describe the major types of expenditure which are likely to be incurred by a business in maintaining its stocks
1. 3 answers
2. asked by Carrol
3. 857 views
If 15.0 kJ are released when 1.40 g of F2 reacts with an excess of SiH4, complete the thermochemical equation below.SiH4(g) + 2
1. 1 answer
2. asked by Megan
3. 851 views
Determine the pH for .16M of NaC2H3O2.Determine the pH for .18M of NaCl.
1. 1 answer
2. asked by Ashley
3. 833 views
For each of three developmental domains: physical, cognitive, and social/personality, identify two major changes or challenges
1. 1 answer
2. asked by brandi
3. 822 views
If a weak acid is say only 5% ionized at equilibrium, then the ionization rxn would be reactant favored, correct? I am a little
1. 1 answer
2. asked by Trixie
3. 822 views
use a right triangle to write the expression as an algebraic expression. assume that x is positive and in the domain of the
1. 1 answer
2. asked by adam2
3. 814 views
how do I solve;two parallelograms have the same base length. The height of the first is half the height of the second. What is
1. 2 answers
2. asked by Kyle
3. 812 views
In which cases are higher-energy photons released, with Li+ or Cu2+? How do you know?
1. 2 answers
2. asked by student
3. 806 views
An inheritance of $50,000 is divided into two investments earning 8.5% and 10% simple interest. ( The 10% investment has a
1. 2 answers
2. asked by donna
3. 796 views
the officejet printer can copy Janet's dissertation in 10 minutes. The laserjet printer can print the same copy in 20 minutes.
1. 2 answers
2. asked by jen
3. 793 views
I have a prompt for an English essay and it says, "In a well developed composition, identify the character, describe what the
1. 2 answers
2. asked by Ana
3. 791 views
Please check my answers.29. In two or three well-developed paragraphs, explain how pollutin can come from both natural sources
1. 0 answers
2. asked by y912f
3. 783 views
use the grid. draw two different figures that each have a perimeter of 14. find each area.question 2. draw a figure with the
1. 8 answers
2. asked by Kainalu Mauga
3. 776 views
A box contains four red marbles, seven white marbles and five blue marbles. If one marble is drawn at random, find the
1. 2 answers
2. asked by alicia
3. 774 views
Would the sentence "Time is Money" be good opening line for a letter urging a group of international business executive to come
1. 4 answers
2. asked by vedrana
3. 773 views
Consider the gas-phase equilibrium A ⇌ B. In a series of experiments, different initialamounts of A and B are mixed together,
1. 1 answer
2. asked by Val
3. 771 views
OH,,, well i found out what i needed.. THANKS FOR YOUR HELP SO FAR!!!! :)
1. 0 answers
2. asked by josh
3. 770 views
The boiling point of ethanol is 78.5C and delta H vap = 40.5kJ/mol. Calculate the vapor pressure (in torr) of ethanol at 0.0C ?
1. 1 answer
2. asked by Staci
3. 754 views
which property justifies: if line lm is congruent to line op then line op is congruent to line lm?
1. 1 answer
2. asked by joise
3. 753 views
Calculate the pOH and pH at 298K of soloutions having the following ion concentrationsA.[OH-] = 1.0 X 10^-12 B.[OH-] = 1.3 X
1. 1 answer
2. asked by Anonymous
3. 751 views
Create a list of 15 different medical terms contained within the article. Define each term; then, break each term down into its
1. 2 answers
2. asked by Sunshine262
3. 746 views
Consider the gas-phase equilibrium A ⇌ B. In a series of experiments, different initialamounts of A and B are mixed together,
1. 1 answer
2. asked by Val
3. 744 views
How much heat (in Joules) is gained by the water where a chemical reaction takes place in 100 mL aqueous solution and has a
1. 1 answer
2. asked by debra
3. 737 views
I need to paraphrase some lines from Beowulf for tomorrow. I really hope you could answer this as well as the previous message I
1. 1 answer
2. asked by Franco
3. 736 views
CheckPoint:Job Search Management:Creat a table that lays out a day-by-day plan to use as a job aid for your employment search,
1. 3 answers
2. asked by susan
3. 729 views
Help needed coming up with a specific thesis. Here is the prompt:Explore the role of women in Archaic Greek society as presented
1. 4 answers
2. asked by Claire
3. 719 views
Given the equilibrium rxnCF4(g) + 2H2O(l) ⇔ CO2(g) + 4HF(g) ΔH < 0 if pressure is increased by adding argon gas to the
1. 1 answer
2. asked by Trixie
3. 714 views
when heated, sodium bicarbonate, NaHCO3, decomposes into sodium carbonate, Na2CO3, water, and carbon dioxide. If 5.00 g of
1. 1 answer
2. asked by Kay
3. 711 views

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