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Questions Asked on March 29, 2010

Which solvent, water or hexane (C6H14), would you choose to dissolve each of the following?1. NaCl 2. HF 3. Octane 4. (NH4)2SO4
1. 2 answers
2. asked by Stephany
3. 6,857 views
A 1.00-kg duck is flying overhead at 1.50 m/s when a hunter fires straight up. The 0.010 0-kg bullet is moving 100 m/s when it
1. 1 answer
2. asked by jillian
3. 5,511 views
solve the equation2sin^2X - 3sinX= -1
1. 1 answer
2. asked by sol
3. 5,121 views
Gallium65, a radioactive isotope of gallium, decays by first order-kinetics. The half-life of this isotope is 15.2 min. How long
1. 1 answer
2. asked by Val
3. 4,209 views
A ball of mass 0.075 kg is fired horizontally into a ballistic pendulum. The pendulum mass is 0.350 kg. The ball is caught in
1. 2 answers
2. asked by sara
3. 4,158 views
The work required to stretch a certain spring from an elongation of 4.11 cm to an elongation of 5.11 cm is 32.0 J.(a) Is the
1. 2 answers
2. asked by Carden
3. 3,903 views
The great galaxy in Andromeda has an angular diameter along its long axis of about 5 degree. Its distance is about 2.2 million
1. 3 answers
2. asked by BB
3. 3,837 views
Calculate the enthalpy change for the following equation:NO(g)+ 1/2O2(g) -----> NO2(g) I have no clue how to do this. I just
1. 2 answers
2. asked by Ana
3. 3,193 views
A 3.5-A current is maintained in a simple circuit with a total resistance of 1500 W. What netcharge passes through any point in
1. 1 answer
2. asked by HELP WITH PHYSICS
3. 2,731 views
Which of the following ionic compounds is INSOLUBLE in water?a. CuSO4 b. AgBr c. KI d. (NH4)2CO3 e. LiNO3
1. 2 answers
2. asked by kolin
3. 2,695 views
A student opens a math book to two facing pages.The product of the page numbers is 210.Find the page numbers.The first page is
1. 4 answers
2. asked by Rose
3. 2,686 views
At a playground, a 18.7 kg child plays on a slide that drops through a height of 2.07 m. The child starts at rest at the top of
1. 4 answers
2. asked by Carden
3. 2,624 views
When light of wavelength 495 nm passes through a single slit of unknown width, the diffraction pattern displays a fourth-order
1. 1 answer
2. asked by jibjab
3. 2,562 views
1. This is the book whose cover is red. This is the book. + Its cover is red.2. This is the book of which the cover is red. This
1. 1 answer
2. asked by rfvv
3. 2,411 views
At what temperature will 50. grams of NH4Cl just saturate 100. grams of water? (the 4 is the number of elements)
1. 6 answers
2. asked by chemistry challenged
3. 2,228 views
What volume of WATER MUST BE ADDED to 10.0 mL of 6.0 M NaOH to make a solution that is 0.30 M in NaOH? Assume that the volumes
1. 2 answers
2. asked by lawrence
3. 2,185 views
3H2(g) + N2(g) reverse reaction arrow 2NH3(g)What factors would affect the equilibrium constant for the reaction above? (Select
1. 1 answer
2. asked by Jeena
3. 2,060 views
Suppose you own a home remodeling company. You are currently earning short-run profits. The home remodeling industry is an
1. 2 answers
2. asked by John
3. 2,015 views
In which of the situations listed below is energy being transferred as heat to the system in order for the system to do work? In
1. 3 answers
2. asked by Edward
3. 1,922 views
Scores on a test have a mean of 66 and Q3 of 81. The scores have a distribution that is approximately normal. Find the standard
1. 2 answers
2. asked by Abby
3. 1,854 views
Aspirin (acetylsalicylic acid, ) is a weak monoprotic acid. To determine its acid-dissociation constant, a student dissolved
1. 2 answers
2. asked by Katie
3. 1,841 views
How much heat is given off when 24.0 g of methane is burned in air? The equation for the reaction is:CH4 + 2O2 => CO2 + 2H2O +
1. 1 answer
2. asked by Lily
3. 1,812 views
A convex security mirror has a focal length of -0.25m. A person with a height of 1.5m is 4m from the mirror. calculate the image
1. 2 answers
2. asked by lily
3. 1,773 views
identify the atoms that are being oxidized and reduced..2FeCl3 + 2KI --> 2FeCl2 + 2KCl + I2
1. 2 answers
2. asked by steven
3. 1,685 views
a projectile is fired in the earth's gravitational field with a horizontal velocity of v=9.00 m/s. How far does it go in the
1. 2 answers
2. asked by sam
3. 1,559 views
A mixture of gasoline vapor and air is placed in an engine cylinder. The piston has an area of 7.4 x 10^-3 m^2 and is displaced
1. 1 answer
2. asked by Edward
3. 1,532 views
11. Chromium is produced by reacting its oxide with aluminum. If 76g of Cr2O3 and 27g of Al completely react to form 51g of
1. 2 answers
2. asked by Zak
3. 1,514 views
Which of these is true about the following reaction?NaOH + HCl ¡æ NaCl + H2O A. NaOH is the proton acceptor. B. HCl acts as
1. 0 answers
2. asked by Lily
3. 1,467 views
Suppose you wanted to produce an aqueous solution of = 8.65 by dissolving the following salt KNO2. At what molarity would you
1. 2 answers
2. asked by sab
3. 1,434 views
Suppose a 69 kg person stands at the edge of a 7.8 m diameter merry-go-round turntable that is mounted on frictionless bearings
1. 2 answers
2. asked by Anonymous
3. 1,424 views
SO2(g) + NO2(g) reverse reaction arrow SO3(g) + NO (g)At a given temperature, analysis of an equilibrium mixture found [SO2] =
1. 3 answers
2. asked by Jeena
3. 1,349 views
Sal keeps quarters, nickels, and dimes in his change jar. He has a total of 52 coins. He has three more quarters than dimes and
1. 2 answers
2. asked by guitarman
3. 1,336 views
Reading Foods is interested in calculating its weighted average cost of capital (WACC). The company’s CFO has collected the
1. 0 answers
2. asked by Michael
3. 1,333 views
There are 300 students in 12th grade. What is the total population of the school?
1. 19 answers
2. asked by Anonymous
3. 1,328 views
Consider the cultural differences inherent in global business as well as the geographic obstacles of home office and remote
1. 1 answer
2. asked by Wanda
3. 1,326 views
The difference between the ages of two friends is 2 years. The sum of their ages is 74 years. Find the age of the older friend.
1. 2 answers
2. asked by Anonymous
3. 1,304 views
Reading Foods is interested in calculating its weighted average cost of capital (WACC). The company’s CFO has collected the
1. 2 answers
2. asked by Michael
3. 1,292 views
The maximum concentration set by the U.S. Environmental Protection Agency for lead in drinking water is 15 ppb.What is this
1. 1 answer
2. asked by Hannah
3. 1,258 views
Deane Company issues $5 million, 10-year, 9% bonds at 96, with interest payable on July 1 and January 1.The straight-line method
1. 1 answer
2. asked by Jenny
3. 1,252 views
Alright, so I'm doing questions on exponent laws for my grade 11 math couse, and I came across one and I've no idea how to
1. 3 answers
2. asked by Felicity
3. 1,233 views
Consider these methods for performance appraisal: trait methods, behavioral methods, and results methods. Then select an
1. 1 answer
2. asked by Lisa
3. 1,230 views
The conic section whose equation is x 2 - 3y 2 - 8x + 12y + 16 = 0, is in Position is I. Is this true or false?
1. 0 answers
2. asked by aaa
3. 1,148 views
how do you make this sentence singular? Mis hermanos quieren jugar al futbol.
1. 3 answers
2. asked by Ummm
3. 1,135 views
The conic section whose equation is x^2 - 3y^2 - 8x + 12y + 16 = 0, is in Position is I. Is this statement true or false
1. 0 answers
2. asked by aaa
3. 1,132 views
Physics force of friction questiona 63kg water skier is pulled across a lake by a rope that exerts a force of 3.2x10^2 and makes
1. 1 answer
2. asked by jake
3. 1,117 views
one difference3 between a gastrovascular cavity and a one-way digestive system is the presence or absence of
1. 0 answers
2. asked by izzy
3. 1,086 views
In many tissues, one of the earliest responses to cellular injury is the rapid increase in the levels of the enzymes involved in
1. 3 answers
2. asked by Anonymous
3. 1,085 views
Can someone give me a website to get references on creating a timeline tracking the following major themes/paradigm shifts in
1. 1 answer
2. asked by Dellaine
3. 1,073 views
When determining the formula for a compound, it is important to know the valence numbers of each element. Suppose that "element
1. 1 answer
2. asked by Shanda
3. 1,036 views
how could I determine experimentally whether all the potassium chlorate had been decomposed?
1. 3 answers
2. asked by Sarah
3. 1,031 views
What Tool Does The National Committee For Quality Assurance Use To Evaluate Health Care?
1. 0 answers
2. asked by misty
3. 1,025 views
[b]1. The problem statement, all variables and given/known data[/b]The average growth rate of the population of a certain city
1. 1 answer
2. asked by Kate
3. 1,001 views
Thank you for any help and assistance.Here is the question/problem: Because of the pressure inside a popcorn kernel, water does
1. 1 answer
2. asked by Demi
3. 991 views
A fish takes the bait and pulls on the line with a force of 2.6 N. The fishing reel, which has a friction clutch that exerts a
1. 1 answer
2. asked by Kyle
3. 988 views
At a playground, a 18.7 kg child plays on a slide that drops through a height of 2.07 m. The child starts at rest at the top of
1. 1 answer
2. asked by Carden
3. 987 views
SO2(g) + NO2(g) reverse reaction arrow SO3(g) + NO (g)At a given temperature, analysis of an equilibrium mixture found [SO2] =
1. 4 answers
2. asked by Jeena
3. 959 views
predict the pH of the solution obtained when a 1.0 M magnesium hydroxide solution is titrated with an equal amount of a 1.0 M
1. 3 answers
2. asked by Ash
3. 956 views
Given f(x)=sin(x)-2cos(x) on the interval [0,2pi]. Determine where the function is concave up and concave down.
1. 1 answer
2. asked by Sarah
3. 942 views
in response to shortened day length and cool temperatures, many trees begin a period of senescence when the breakdown of
1. 0 answers
2. asked by ramla
3. 941 views
What is major axis for the equation 9x^2 + 16y^2 - 36x + 96y + 36 = 0
1. 1 answer
2. asked by hopple
3. 924 views
Given the elementary reaction:2 NOBr==>2 NO + Br2 k = 0.80 Which variables obtained for this reaction will produce a straight
1. 2 answers
2. asked by Val
3. 923 views
A compound containing 3 atom of carbon and 8 atoms of hydrogen is combined in a reaction wih oxygen molecules. The two end
1. 1 answer
2. asked by jessica
3. 923 views
1. There is a box of apples.2. There is a bunch of bananas. 3. There are two baskets of oranges. 4. There are a few cartons of
1. 1 answer
2. asked by rfvv
3. 912 views
Replication of the E. coli chromosome takes 40 to 45 minutes, but the organism has a generation time of 26 minutes. How does the
1. 0 answers
2. asked by anon
3. 902 views
1.Air can be compressed. What does it mean and why can it be compressed?2.Air can be expanded. What does it mean and why can it
1. 0 answers
2. asked by Jamie
3. 901 views
According to the center of Science in the Public Interest, the maximum healthy weight for a person who is 5 feet, 5 inches is
1. 2 answers
2. asked by guitarman
3. 897 views
True or FalseAlpha level becomes zero only when both samples reflect different populations.
1. 2 answers
2. asked by RMJ
3. 896 views
8. For the reaction H2(g)+I2(g)„\2HI(g); [H2] = 0.95 M; [I2] = 0.78 M; [HI] = 0.27 M. Calculate the equilibrium constant K and
1. 1 answer
2. asked by Kathleen
3. 888 views
Solve the problem. Use 3.14 for ð. Round to the nearest tenth, if necessary. A cylindrical container has a diameter of 10 in.
1. 2 answers
2. asked by Cindy
3. 874 views
4. Write the balanced equation for CH4+Cl2„_CH2Cl2+HCl6. For the reaction in problem 4, Heat of Reaction = -118.3 kcal/mol.
1. 2 answers
2. asked by Kathleen
3. 861 views
t is stand accounting procedures, or GAAP, to make an adjusting entry to remove the current year�s principle from the
1. 0 answers
2. asked by Tammy
3. 838 views
4. Write the balanced equation for CH4+Cl2„_CH2Cl2+HCl What are 3 ways you can speed the reaction in this equation?
1. 1 answer
2. asked by Kathleen
3. 834 views
what types of communication filters are presentA female doctor attempting to explain to her 27-year-old male patient that his
1. 4 answers
2. asked by Ravioli
3. 832 views
choose an epigram in the excerpt from Emerson's Nature? or where can i find information on it
1. 1 answer
2. asked by Anonymous
3. 816 views
Suppose you received a message from aliens living on a planet orbiting a star identical to our Sun. They say they live 4 times
1. 2 answers
2. asked by Anonymous
3. 808 views
Reading Foods is interested in calculating its weighted average cost of capital (WACC). The company’s CFO has collected the
1. 0 answers
2. asked by Michael
3. 800 views
Train A and B are traveling in the same direction on parallel tracks. Train A is traveling at 100 miles per hour and train B is
1. 3 answers
2. asked by KiKi
3. 789 views
Which word is an antonym of vociferous?a}soft-spoken b}clamorous c}blatant d}obstreperoys
1. 12 answers
2. asked by lidsey
3. 785 views
2 pairs of shoes, 5 pairs of pants, and 6 shirts on a trip. Assuming all items are compatible, how many different outfits can be
1. 2 answers
2. asked by john
3. 784 views
A 7 inch pizza cost $8 and a 14 inch pizza costs $20. Tommy says the smaller pizza is a better buy because the larger pizza is
1. 5 answers
2. asked by Lori
3. 780 views
Why are fermentation tubes evaluated at 24 and 48 hrs?If an organism oxidatively metabolizes glucose, what will occur in the
1. 0 answers
2. asked by Kathleen
3. 776 views
A ball of mass 0.075 kg is fired horizontally into a ballistic pendulum. The pendulum mass is 0.350 kg. The ball is caught in
1. 0 answers
2. asked by april
3. 765 views
a ladder 10 ft long rests against a vertical wal. if the bottom of the ladder slides away from the wall at a rate of 0.7 ft/s,
1. 0 answers
2. asked by Allie
3. 764 views
a scientist finds no evidence that species in a community are competing and concludes that competition never played a role in
1. 1 answer
2. asked by Lala
3. 762 views
a 3.5 kg dog stands on a 21 kg flatboat at distance D = 6.1 m from the shore. It walks 2.3 m along the boat toward shore and
1. 0 answers
2. asked by Anonymous
3. 755 views
Just..... don't get itA column packing for chromatography consists of a mixture of two types of particles. Assume that the
1. 0 answers
2. asked by Sai
3. 745 views
4. Write the balanced equation for CH4+Cl2„_CH2Cl2+HCl 4a. For the reaction in problem 4, ƒ´H = -118.3 kcal/mol. Identify
1. 1 answer
2. asked by Kathleen
3. 744 views
Hello!Have a question. I am writing a lesson plan and am confused now. When learners are doing for example a fill in exercise
1. 2 answers
2. asked by refy
3. 743 views
Explain the function of ATP synthatase in both photosynthesis and cellular respiration.
1. 0 answers
2. asked by sarah
3. 742 views
What are the molar heat capacities of: H2O(l) NaCl and Tungsten? I got75.32 J/K*mol 50 J/K*mol 24.8 J/K*mol
1. 3 answers
2. asked by Ana
3. 739 views
What natural forces have helped shape the physical features of North America?
1. 2 answers
2. asked by ahmed
3. 735 views
You throw a ball upward and then it falls back down. How does the velocity of the ball change as it rises and falls?
1. 0 answers
2. asked by Jenna
3. 732 views
When McDonald's Corp. reduced the price of its Big Mac by 75 percent if customers also purchased french fries and a soft drink,
1. 0 answers
2. asked by John
3. 731 views
A clean glass capillary tube is held vertically in water raised to a height of 7cm. The tube is down depressed and only 5cm of
1. 0 answers
2. asked by Edwin
3. 725 views
Pt | Fe2+ (6.4010-5 M), Fe3+ (0.0460 M) || Sn4+ (2.7010-4 M),Sn2+ (0.0750 M) | Pti need to calculate the voltage of the cell. I
1. 2 answers
2. asked by Val
3. 724 views
in japan, native honeybees have evolved an effective defense strategy against giant Japanese hornets. imported European
1. 0 answers
2. asked by Lala
3. 718 views
1. She is eating a noodle.2. She is eating noodles. 3. She ate two bowls of noodles. 4. She ate two bowls of noodle. (Which ones
1. 1 answer
2. asked by rfvv
3. 710 views
• Plan a science experiment. In your paper, address the following points:o List the equipment and materials to be included in
1. 5 answers
2. asked by scooby
3. 704 views
is this sentence a valid or sound argumentif you want to listen to loud music, do it when we are not at home. It bothers us, and
1. 3 answers
2. asked by Anonymous
3. 704 views
Consider a bowl containing 36 different slips of paper. Ten of the slips ofpaper each contain one of the digits from the set 0
1. 1 answer
2. asked by Tyga
3. 704 views

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