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Questions Asked on April 5, 2010

Using the equation Zeff = Z - S and assuming that core electrons contribute 1.00 and valence electrons contribute 0.00 to the
1. 5 answers
2. asked by Jerica
3. 9,778 views
Lithium nitride reacts with water to form ammonia and aqueous lithium hydroxide.Li3N(s) + 3H2O(l) ==> NH3(g) + 3LiOH(aq) a)What
1. 6 answers
2. asked by Kim
3. 9,011 views
what is the empirical formula of a compound that is 62.0% C, 10.4% H, and 27.5% O by mass?
1. 2 answers
2. asked by Macey
3. 5,266 views
In a reaction chamber, 3.0mol of aluminum is mixed with 5.3mol Cl2 and reacts. The reaction is described by the following
1. 1 answer
2. asked by Jack
3. 4,663 views
This one stumped me alot...Aqueous solutions of a compound did not form precipitates with Cl-, Br-, I-, SO4 2-, CO3 2-, PO4 3-,
1. 3 answers
2. asked by Macey
3. 4,366 views
Methanol (CH3OH) is used in the production of many chemicals. methanol is made by reacting carbon monoxide and hydrogen at high
1. 1 answer
2. asked by Kim
3. 4,363 views
Suppose that a PES experiment is performed in which mercury vapor is irradiated with ultraviolet light of wavelength 58.4 nm.Ene
1. 3 answers
2. asked by Jerica
3. 3,672 views
I have to write an eight-sentence paragraph that fully develops this topic.A high school diploma is important to my future......
1. 2 answers
2. asked by me
3. 3,652 views
5F2(g) + 2NH3(g) ==> N2F4(g) + 6HF(g)a)If you have 66.6 g NH3, how many grams of F2 are required for complete reaction? b)How
1. 2 answers
2. asked by Danny
3. 3,554 views
A baseball catcher puts on an exhibition by catching a 0.150 kg ball dropped from a helicopter at a height of 100 meters above
1. 1 answer
2. asked by Omari
3. 3,505 views
If two dice are rolled, what is the probability that the sum of the numbers is at least 8?
1. 2 answers
2. asked by Debbie
3. 2,911 views
Identify the word in bold type.THIS is the dog I was telling you about. A)demonstrative pronoun B)indefinite pronoun
1. 3 answers
2. asked by nick
3. 2,901 views
The Cu2+ ion can be separated from Ag+,Ca2+, and K+ in aqueous solution by 1. precipitation of Cu2+ as Cu(OH)2(s) with 6 M
1. 1 answer
2. asked by Christina
3. 2,814 views
Identify the type of conjunction in the following sentence.We'll be able to eat when Grandma arrives. A)conjunctive adverb
1. 4 answers
2. asked by nick
3. 2,694 views
Many cultures around the world still use a simple weapon called a blowgun, a tube with a dart that fits tightly inside. A sharp
1. 3 answers
2. asked by paro
3. 2,661 views
Identify the word in bold type.None of those bagels look fresh. A)demonstrative pronoun B)indefinite pronoun C)interrogative
1. 3 answers
2. asked by nick
3. 2,496 views
50.0ml of 0.10M HCL{aq} was added to 40.0ml of 0.10M NaOH{aq} and the mixture was stirred,then tested with a pH meter.What
1. 3 answers
2. asked by justin
3. 2,293 views
A projectile is shot straight up from the earth's surface at a speed of 1.20×10^4 km/h.How high does it go?
1. 1 answer
2. asked by Mike
3. 2,270 views
(a) When 300.0 milliliters of a solution of 0.200 molar AgNO3 is mixed with 100.0 milliliters of a 0.0500 molar CaCl2 solution,
1. 2 answers
2. asked by Jessica
3. 2,217 views
The reaction of flourine with ammonia produces dinitrogen tetrafluoride and hydrogen fluoride.5F2(g) + 2NH3(g) ==> N2F4(g) +
1. 3 answers
2. asked by Keith
3. 2,178 views
Heating an ore of antimony (Sb2S3) in the presence of iron gives the element antimony and iron(II) sulfide.Sb2S3(s) + 3Fe(s) ==>
1. 2 answers
2. asked by Ken
3. 2,024 views
Calculate and compare the mass of the reactants with the mass of the products for each equation.a)2KClO3 (s) ==> 2KCl(s) + 3O2
1. 2 answers
2. asked by Ralph
3. 2,005 views
0.11 mol of argon gas is admitted to an evacuated 50cm^3 container at 10 degree C. The gas then undergoes an isothermal
1. 1 answer
2. asked by paro
3. 1,877 views
A teacher allows the students to each "throw out" their lowest test score in order to increase theiroverall grade. The original
1. 1 answer
2. asked by Nicci
3. 1,835 views
Consider the following reaction:PbCl2 + 2 NaOH -> Pb(OH)2 + 2 NaCl What would be the major species observed floating in solution
1. 1 answer
2. asked by Cher
3. 1,782 views
Identify the word in bold type.Do you know someone who can fix a lamp? A)demonstrative pronoun B)indefinite pronoun
1. 4 answers
2. asked by george
3. 1,740 views
which of the following substances (with specific heat provided) would show the greatest temperature change upon absorbing 100.0
1. 1 answer
2. asked by Bryson
3. 1,674 views
how much energy (in kJ) is required to change the temp of 1.00 kg of Fe from 25.0 degrees celsius to 1515 degrees celsius? the
1. 4 answers
2. asked by Danielle
3. 1,672 views
A mass attached to a spring oscillates with a period of 3.15 s.If the mass starts from rest at x = 0.0530 m and time t = 0,
1. 2 answers
2. asked by Tory
3. 1,631 views
A 20kg mass moving at a speed of 3m/s is stopped by a constant force of 15N.Show that the stopping time required is 4s.
1. 1 answer
2. asked by sherri
3. 1,594 views
Which of the following is NOT true of colligative properties? Colligative properties are...A. dependent on the mass of solute
1. 4 answers
2. asked by UCI studebt
3. 1,594 views
how would i solve this?A sled is dragged along a horizontal path at a constant speed of 1.5 m/s by a rope that is inclined at an
1. 2 answers
2. asked by jess
3. 1,567 views
A 82 kg adult sits at one end of a 8.6 m long board. His 23 kg child sits on the other end. Where should the pivot be placed so
1. 3 answers
2. asked by Anonymous
3. 1,558 views
If delta G for the dissociation of Borax at 30 degrees C (higher than room temperature) is positive, why does it dissolve at
1. 3 answers
2. asked by Jane
3. 1,541 views
what is the major product of this reaction CH2=CH-CH2CH3+H2O H2SO4
1. 1 answer
2. asked by bryan
3. 1,536 views
A light string has its ends tied to two walls separated by a distance equal to five-eighths the length of the string. A 53 kg
1. 2 answers
2. asked by pop
3. 1,501 views
They left the oven on; consequently, the roast was burnt beyond recognition.A)conjunctive adverb B)coordinating conjunction
1. 1 answer
2. asked by george
3. 1,485 views
Write a balanced equation:Aluminum reacts with aqueous hydrochloric acid to form hydrogen gas and aqueous aluminum chloride. I
1. 1 answer
2. asked by Lou
3. 1,441 views
24. Explain the differences between the four major types of bridges. Include as part of your answer which bridge structure is
1. 3 answers
2. asked by y912f
3. 1,332 views
Citric acid (pKa1 = 3.13, pKa2 = 4.76, pKa3 = 6.40) is found in citrus fruit. Calculate the approximate pH of lemon juice, which
1. 2 answers
2. asked by Jeena
3. 1,325 views
While visiting Planet Physics, you toss a rock straight up at 15 m/s and catch it 2.4 s later. While you visit the surface, your
1. 2 answers
2. asked by Mike
3. 1,294 views
A 115kg astronaut throws an 18kg tool kit at 4.6m/s away from a spacecraft in deep space. Show that the astronaut will recoil at
1. 1 answer
2. asked by sherri
3. 1,286 views
Three charges of 5 x 10^(-6) C are placed on the vertices of an equilateral triangle of 10cm. Calculate force on each charge.
1. 1 answer
2. asked by Edwin
3. 1,261 views
Are 5s and 5p considered to be degenerate orbitals? I know degenerate orbitals mean that they have the same energy but different
1. 1 answer
2. asked by echem
3. 1,220 views
Identify the word in bold type.None of those bagels look fresh. A)demonstrative pronoun B)indefinite pronoun C)interrogative
1. 9 answers
2. asked by george
3. 1,213 views
How many milliliters of 0.0050 N KOH are required to neutralize 19 mL of 0.0050 N H2SO4?How many milliliters of 0.0050 N KOH are
1. 1 answer
2. asked by Anonymous
3. 1,213 views
In an election for student council president at Russell Sage College, 80 students were polled and asken for whome the planned to
1. 1 answer
2. asked by Krystle
3. 1,202 views
Mary brought home 1/2 dozen eggs. He accidently dropped the carton on the flor and 1/3 of the eggs broke. How many eggs does she
1. 3 answers
2. asked by Rene
3. 1,195 views
which of the following substances (with specific heat provided) would show the greatest temperature change upon absorbing 100.0
1. 1 answer
2. asked by Bryson
3. 1,182 views
A motorist drives along a straight road at a constant speed of 15.0 m/s. Just as she passes a parked motorcycle police officer,
1. 2 answers
2. asked by LeRon
3. 1,168 views
OK. I am trying to work on a project and I need help with one or two things.1. I have come up with an idea, but can't seem to
1. 1 answer
2. asked by Elisabeth
3. 1,166 views
w w w (dot)cs(dot)umass(dot)edu(slash)~verts(slash)coins105(slash)quizzes(slash)images(slash)hw10(dot)gifUsing the constants in
1. 1 answer
2. asked by Andy
3. 1,166 views
A rocket is fired straight up from the ground with an initial velocity of 800 feet per second.(a) How long does it take the
1. 1 answer
2. asked by emfn
3. 1,164 views
2 litres of acetronitrile is accidently spilt in a school lab of dimensions 40x20x10m and most evaporates calculate the ambient
1. 1 answer
2. asked by Heather
3. 1,152 views
What is the solubility of CaF2 in a buffer solution containing .30 M HCHO2 and .20 M NaCHO2?
1. 4 answers
2. asked by Kelley
3. 1,116 views
Following are three sets of letters. Draw one letter from Set 1 and place it in Set 2. Then draw oneletter from Set 2 and place
1. 1 answer
2. asked by Tasha
3. 1,105 views
describes and details how globalization, outsourcing, off-shoring and offshore outsourcing has influenced/impacted contemporary
1. 0 answers
2. asked by Jeniffer
3. 1,065 views
a sample of gas is compressed from 3.25 l to 1.20 l at constant temperature. if the pressure of this gas in the 3.25 l volume is
1. 2 answers
2. asked by hasan
3. 1,029 views
determine m given that m>0 and the points (m,3) and (1,m) lie on a line with slope m
1. 2 answers
2. asked by kelly
3. 1,025 views
if the 14 Points were actually followed could World War II have prevented? Even without the League of Nations would the reforms
1. 1 answer
2. asked by marie
3. 1,024 views
NaHCO3 + HCl = NaCl + H2O + CO2The HCl in the reaction is 2 molar what i need it to figure out how much CO2 if produced when 10g
1. 1 answer
2. asked by Souza
3. 1,023 views
a snow globe has a diameter of 6 inches.find its exact volume.then approximate its volume using 3.14 for [pi]
1. 1 answer
2. asked by Anonymous
3. 1,017 views
What role should America�s ideals play in its national security policy? Include historical, current, and hypothetical cases in
1. 0 answers
2. asked by Kayson
3. 995 views
According to data from the U.S. Census Bureau, the population P of Cleveland, Ohio (in thousands) in year x can be approximated
1. 0 answers
2. asked by emfn
3. 978 views
How do i find this? A shooting star is a meteor that burns up when it reaches Earth's atmosphere. Many of these meteoroids are
1. 2 answers
2. asked by raina
3. 971 views
Objects with masses of 190 kg and a 490 kg are separated by 0.380 m.(a) Find the net gravitational force exerted by these
1. 1 answer
2. asked by Kelsey
3. 947 views
Is this the correct way to cite a source using parenthetical documentation in my research paper?Coal is a solid fossil fuel
1. 0 answers
2. asked by mysterychicken
3. 915 views
child is now 3 years old - dad opens account with $10,000 it earns 4.5% annual intrest.a) construct formula (A(t)=Ao(a)^t) b)
1. 0 answers
2. asked by cc
3. 908 views
question 1 x/32=7/8and question 2 y/12=5/0.6 please help
1. 0 answers
2. asked by tea
3. 896 views
A light string has its ends tied to two walls separated by a distance equal to five-eighths the length of the string. A 53 kg
1. 1 answer
2. asked by pop
3. 891 views
How many moles of water are produced from the combustion of 3.5 mol of hydrogen and 5.2 mol of oxygen?
1. 1 answer
2. asked by Sam
3. 866 views
Consider the function below. (Round the answers to two decimal places. If you need to use - or , enter -INFINITY or INFINITY.)f(
1. 2 answers
2. asked by Anonymous
3. 859 views
2.75+.003+.158=
1. 2 answers
2. asked by jaylynn
3. 848 views
Find the angle between the vectors. (Round your answer to the nearest degree.)a = ‹-4, 3› b = ‹√7, 3›
1. 1 answer
2. asked by Mike
3. 832 views
Dirk pushes on a packing box with a horizontal force of 67.0 N as he slides it along the floor. The average friction force
1. 3 answers
2. asked by anna
3. 832 views
find the volume of the solid whose base is bounded by y=e^(-x), y=3cos(x), and x=0 and whose cross sections cut by planes
1. 0 answers
2. asked by jenna
3. 832 views
Today, many organizations and managers face new challenges on a daily basis. One critical aspect of the skills that managers
1. 4 answers
2. asked by Akin
3. 824 views
WHAT WAS FRANKLIN D. ROOSEVELT'S COURT PACKING SCHEME? WHAT IMPACT DID IT HAVE ON HIS PRESIDENCY AND WHY DID HE DO IT. PLEASE
1. 1 answer
2. asked by Dellaine
3. 818 views
is a shortage of tyrosine the cause of albinism? can u explain the answer.
1. 0 answers
2. asked by Shannon
3. 809 views
how would you compare the nature of the postwar world envisioned by the Allies in World Wars I and II?
1. 2 answers
2. asked by Mia
3. 805 views
Neutron stars, such as the one at the center of the Crab Nebula, have about the same mass as our sun but a much smaller
1. 0 answers
2. asked by Mike
3. 805 views
A 0.490 M solution of an unknown monoprotic weak acid, HA, is 2.80% ionized. What is the value of Ka for HA?
1. 1 answer
2. asked by Jenny
3. 801 views
Identify the word in bold type.This is the dog I was telling you about. A)demonstrative pronoun B)indefinite pronoun
1. 4 answers
2. asked by nick
3. 800 views
I have a project due this week and I have to make a board game, so I need 15 questions about right triangles. I already have
1. 2 answers
2. asked by Jenny
3. 773 views
How much heat on joules is required to melt 3mol of ice? (the heat of fusion is 6.01 kj/mol)
1. 1 answer
2. asked by Cassy
3. 765 views
A 2000 pound car is parked on a street that make an angle of 12 degrees with the horizontal figureFind the force perpendicular
1. 0 answers
2. asked by gary
3. 760 views
A collective noun is plural when the group acts as a unit (i.e., "The team lost their fourth game in a row.").A)true B)false i
1. 4 answers
2. asked by george
3. 759 views
what would the chemical equation look like for each IUPAC name 4-phenyl-2-pentyne b. 2-phenyl-3-pentyne c. 3-phenyl-4-pentyne d.
1. 1 answer
2. asked by bryan
3. 721 views
"We give this award to Dexter, without whom we never would have found Mike's shoes." demonstrates correct use of whom.A)true
1. 1 answer
2. asked by george
3. 715 views
Not sure if I'm doing this rightLn(3x-4)-Ln(x+1)=Ln(2) My solution: Ln 3x-4/x+1 =Ln2 3x-4/x+1=2/1 2x+2=3x-4 2=x-4 6=x
1. 1 answer
2. asked by Cecilia
3. 711 views
How should the United States prosecute its war against global terrorism over the next several years? Should the United States
1. 3 answers
2. asked by Kayson
3. 710 views
The case of a pronoun is determined by how it is used in a sentence.A)true B)false i think it is (b)
1. 1 answer
2. asked by English 202
3. 709 views
1) What factors shaped the move from colonial, country life to modern, urban life? What was urban city life like during the rise
1. 5 answers
2. asked by Lauri
3. 706 views
The short-run cost curve for each firm's long run equilibrium output is C=y^2-20y+400. Calculate the short-run average and
1. 1 answer
2. asked by Jill
3. 703 views
How to do this problem?Compute the number of turns of wire on a coil whose resistance measures 15.5 ohms�, and which is wound
1. 6 answers
2. asked by Mike
3. 691 views
What is the magnitude of the gravitational field at the surface of a neutron star whose mass is 1.60 times the mass of the Sun
1. 3 answers
2. asked by mary
3. 687 views
how do i solve this, i tried dividing the mass by the height, but its wrongA 407-kg pile driver is raised 15 m above ground. (a)
1. 0 answers
2. asked by james
3. 681 views
what is a cerebral lobe not visiblein an ordinary external inspection
1. 0 answers
2. asked by Maurice
3. 680 views
which of the following sets gives the x coordinates where the parabola y=x^2+4X-50 and the line y=7x-10 intersect when drawn in
1. 2 answers
2. asked by Emma
3. 675 views
The 6 fourth-grade classes at Marathon Elementary School are having a kick-ball tournament. Each class must play each other one
1. 2 answers
2. asked by Mina
3. 668 views

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