Questions Asked on February 10, 2013

The lengths of pregnancies are normally distributed with a mean of 273 days and a standard deviation of 20 days. If 64 women are
1. 2 answers
2. asked by Jane
3. 13,215 views
If the probability of a newborn child being female is 0.5, find the probability that in 100 births, 55 or more will be female.
1. 3 answers
2. asked by Kayla
3. 11,898 views
The body temperatures of adults are normally distributed with a mean of 98.6 degree F and a standard deviation of 0.60 degree F.
1. 3 answers
2. asked by Maile
3. 11,449 views
What is the current through a wire if 240 coulombs ofcharge pass through the wire in 2.0 minutes?
1. 4 answers
2. asked by Physics
3. 6,511 views
Consider the following equilibrium:PCl3 (g) + Cl2 (g) yields PCl5 (g) delta H= -92KJ The concentration of PCl3 at equilibrium
1. 3 answers
2. asked by Robby
3. 6,234 views
graph the line with slope 1/2 passing through the point(-5,-2)find the slope of the line 5x+5y=3 write answer in simplest from
1. 11 answers
2. asked by Anonymous
3. 5,824 views
What is the molality of an aqueous solution that is 10.0% ethanol, C2H5OH, by mass?
1. 26 answers
2. asked by Marcus
3. 4,252 views
When 1.150 grams of an unknown nonelectrolyte dissolves in 10.0 grams of water, the solution freezes at -2.16°C. What is the
1. 2 answers
2. asked by Marcus
3. 3,904 views
What is the vapor pressure of a aqueous solution containing 10 % (by weight) ethylene glycol (62 g/mol) at 25 °C. PH2O = 24.3
1. 2 answers
2. asked by Marcus
3. 3,810 views
A boy and his skateboard have a combined mass of 64 kg. If he is moving with a speed of3.2 m/s, and collides with a stationary
1. 1 answer
2. asked by chelsea
3. 3,677 views
What mass of water must be used to dissolve 20.0 grams of ethanol, C2H5OH, to prepare a 0.0500 molal solution of ethanol?
1. 10 answers
2. asked by Marcus
3. 3,515 views
What pressure would a mixture of 3.2 gramsof O2, 6.4 grams CH4, and 6.4 grams of SO2 exert if the gases were placed in a 5.1
1. 7 answers
2. asked by cheri
3. 3,509 views
Consider the following equilibrium:NH4Cl(s)--->NH3(g) + HCl(g) Suppose a vessel containing NH4Cl(s), NH3(g) and HCl(g) is at
1. 3 answers
2. asked by Lisa
3. 3,089 views
Please help me figure out where I went wrong.HNO3 + KOH -> KNO3 + H2O enthalpy change = -53.4 kJ/mol 55.0 mL of 1.30 mol/L
1. 3 answers
2. asked by A Canadian
3. 2,747 views
2NF3(g) yields N2(g) + 3F2(g)When 2.06 mol of NF3 is placed in a 2.00L container and allowed to come to equilibrium at 800K, the
1. 3 answers
2. asked by Robby
3. 2,717 views
A dropping ball initial at rest is dropped 1.5m; calculate a) the traveling time of the ball and b) its velocity just before
1. 1 answer
2. asked by John
3. 2,671 views
At 900.0K, the equilibrium comstant (kp) for the following reaction is 0.3452SO2 (g) + O2 (g) yields 2SO3 (g) At equilibrium the
1. 1 answer
2. asked by Robby
3. 2,517 views
A solution contains 10.0 g pentane, C5H12, 10.0 g hexane, C6H14 and 10.0 g benzene, C6H6. What is the mole fraction of hexane?I
1. 1 answer
2. asked by Marcus
3. 2,499 views
A 1-m-tall barrel is closed on top except for a thin pipe extending 5 m up from the top. When the barrel is filled with water up
1. 1 answer
2. asked by jay
3. 2,310 views
in an attempt to establish the formula of an oxide of nitrogen , a known volume of the pure gas was mixed with hydrogen and
1. 2 answers
2. asked by harish
3. 2,175 views
Which of the following is not an example of a science?geology astronomy astrology ecology
1. 8 answers
2. asked by sabrina
3. 2,086 views
A 115 mg sample of eugenol, the compoundresponsible for the odor of cloves, was placed in an evacuated flask with a volume of
1. 1 answer
2. asked by cheri
3. 2,010 views
Reasoning It costs $7 for a matinee and $8 for an evening movie. With $56, would you be able to buy more matinee tickets or
1. 6 answers
2. asked by Quan
3. 1,998 views
John has 3 unique coins such that the probability of obtaining a head when the coin is flipped is 110, 210 and 310,
1. 2 answers
2. asked by john
3. 1,891 views
Thelma and Louie's Inc started the year with a balance of retained earnings of $547 million and ended the ear with retained
1. 1 answer
2. asked by steve
3. 1,824 views
An oxygen sample has a volume of 5 L at 27�Cand 800 torr. How many oxygen molecules does it contain?
1. 2 answers
2. asked by cheri
3. 1,766 views
Two people decide to estimate the height of a flagpole. One person positions himself due north of the pole and the other person
1. 1 answer
2. asked by Tina
3. 1,745 views
An apparatus consists of a 2 L flask containingnitrogen gas at 25�C and 819 kPa, joined by a valve to a 12 L flask containing
1. 3 answers
2. asked by cheri
3. 1,687 views
During an action potential, Na^+ ions move into the cell at a rate of about 3x10^-7 mol/m^2*s.How much power must be produced by
1. 4 answers
2. asked by John
3. 1,677 views
a chimney of 20m height standing on the top of a building subtends an angle whose tangent is 1/6 at a distance of 70m from the
1. 1 answer
2. asked by Anonymous
3. 1,666 views
Suppose a compound Z had a partition coefficient of 8.0 in ether-water. If 10.0 g of Z was dissolved in 100 mL of water, and if
1. 2 answers
2. asked by sara
3. 1,662 views
A certain first-order reaction has a rate constant of 2.75 10-2 s−1 at 20.°C. What is the value of k at 50.°C if Ea = 75.5
1. 1 answer
2. asked by Hannah
3. 1,644 views
8. Electric field lines arising from two small charged particles P and Q.Consider the following two statements: i.The charge on
1. 1 answer
2. asked by John
3. 1,632 views
A 1.50 liter tank filled with helium at 125 atmis used to fill balloons. The pressure in each balloon is 950 torr and the volume
1. 1 answer
2. asked by cheri
3. 1,608 views
Explain It Adam made 19 paper cranes Monday and 8 more Tuesday. He gave 9 friends an equal number of cranes. How many cranes did
1. 3 answers
2. asked by TJ
3. 1,557 views
Which of the following is the greatest concern for Eastern Europe?water pollution water availability desertification
1. 2 answers
2. asked by gg
3. 1,532 views
Vitamin K is involved in normal blood clotting. When 1.36 g of vitamin K is dissolved in 25.0 g of camphor, the freezing point
1. 2 answers
2. asked by Nefret
3. 1,489 views
Suppose there is a pile of quaters, dimes, an pennies with a total is $1.06,How much of each coin can be present without being
1. 2 answers
2. asked by Enis
3. 1,485 views
Which statement is the best example of pseudoscience?Mike joined a group that studies phrenology. C.J. joined a group that
1. 1 answer
2. asked by samantha
3. 1,477 views
2KI+Pb(NO3)2=2KNO3+PbI2suppose a solution containing 1.25g of KI is combined with a solution containing 2.42g Pb(NO3)2 _what
1. 1 answer
2. asked by may
3. 1,453 views
12kg box is placed on a rough surface. A force of 20N is applied at an angle of 30 degrees. Calculate the magnitude and
1. 2 answers
2. asked by Sybil
3. 1,403 views
Do you view a chocolate bar as delicious or asfattening? Your attitude may depend on your gender. In a study of American college
1. 1 answer
2. asked by Nickie
3. 1,357 views
Solve the trigonometric equations.1.) SIN²x(CSC²x-1) 2.) COT x SEC X 3.) COS²[(π/2)-x]/COS X (Note: These mathematical
1. 1 answer
2. asked by AwesomeGuy
3. 1,332 views
Light from a sodium lamp (lambda = 589 nm) illuminates two narrow slits. The fringe spacing on a screen 150 cm behind the slits
1. 0 answers
2. asked by Michael
3. 1,267 views
HCOOH(aq) <-----> H^+ (aq)+ HCOO^-(aq)The equilibrium constant (Ka) for Reaction 3 at 25 °C is 1.80 × 10−4 mol dm−3.
1. 5 answers
2. asked by Mark
3. 1,258 views
On a 10.5 ounce bag of potato chips, the manufacturer states that the single serving is one ounce, which is equivalent to 150
1. 1 answer
2. asked by Katie
3. 1,254 views
A definite amount of NH4cl was boiled with 100ml of 0.8N naoh for complete reaction . After the reaction mixture containing
1. 1 answer
2. asked by Fai
3. 1,251 views
a metal power/laundry line which hang droop on a very warm day
1. 2 answers
2. asked by boitumelo lipheko
3. 1,242 views
As your bus rounds a flat curve at constant speed, a package with mass 0.900 , suspended from the luggage compartment of the bus
1. 0 answers
2. asked by Alex
3. 1,210 views
I still am confused about the snail lab things...Ms. Sue helped me with the calculate, but I still have a question...
1. 1 answer
2. asked by Ji
3. 1,182 views
There are two different formulas or methods that can be used to calculate SS.under what circumstances is the definitional
1. 1 answer
2. asked by Anonymous
3. 1,175 views
A clothing company employs 36 workers on first shift and 19 workers on second shift. Five workers are chosen at random to be
1. 0 answers
2. asked by Kristi
3. 1,143 views
Tater and Pepper Corp. reported free cash flows for 2012 of $43.1 million and investment in operating capital of $26.1 million.
1. 2 answers
2. asked by steve
3. 1,133 views
Thelma and Louie's Inc started the year with a balance of retained earnings of $547 million and ended the ear with retained
1. 0 answers
2. asked by steve
3. 1,115 views
Translate: I have a big nose.Is it: Tengo la nariz grande. or : Tengo una nariz grande. My teacher says you must use el, la,
1. 1 answer
2. asked by Joe
3. 1,086 views
How much work is done when a force of 800.0 N is exerted while pushing a crate across a level floor for a distance of 1.5 m
1. 1 answer
2. asked by Rick
3. 1,069 views
Please Check this for me.1. Which process involves both passive and active transport? a.)facilitated diffusion<----
1. 1 answer
2. asked by A
3. 1,064 views
Calculate the pH for each of the following cases in the titration of 50.0 mL of 0.200 M HClO(aq) with 0.200 M KOH(aq). The
1. 1 answer
2. asked by Kathy
3. 1,047 views
The mean scale score on the mathematics examinatin of ninth graders in Texas was 86 with a standard deviation of 5 points. Given
1. 0 answers
2. asked by kelly
3. 1,023 views
A 6.9 gram sample of a gaseous substanceoccupies 10 L at 63�C and 537 torr. What is the density of the gas under these
1. 3 answers
2. asked by cheri
3. 1,017 views
How will you prepare potassium per magnate.
1. 1 answer
2. asked by chemistry
3. 1,015 views
I need to figure out how to solve this equation your help will be much appreciate:-)√5(x-1.2)-√3x<5(x+1.1)
1. 0 answers
2. asked by Anonymous
3. 1,009 views
Derive Gauss law in integral form.
1. 0 answers
2. asked by mania
3. 1,002 views
Teri scored 64 points in the first 8 basketball games she played in. She scored the same number of points in each game. How many
1. 3 answers
2. asked by Amari
3. 999 views
Please show me the steps to solving this equation:-)√5(x-1.2)-√3x<5(x-1) Your help is greatly appreciated.
1. 0 answers
2. asked by Anonymous
3. 984 views
The drawing shows a square, each side of which has a length of L = 0.25 m. Two different positive charges q1 and q2 are fixed at
1. 0 answers
2. asked by Anonymous
3. 973 views
determine the amount of heat generated per minute by a 120 volt lamp which takes 0.5 amperes.thanks!
1. 1 answer
2. asked by nitz
3. 966 views
i need to draw a concept map that represents the relationships among the concepts under study for either Middle-range theory,
1. 1 answer
2. asked by Tabby
3. 958 views
For a certain transverse wave, the distancebetween two successive maxima is 1.26 m and eight maxima pass a given point along the
1. 0 answers
2. asked by Anonymous
3. 953 views
Two identical point charges (q = +4.60 x 10-6 C) are fixed at opposite corners of a square whose sides have a length of 0.510 m.
1. 0 answers
2. asked by Anonymous
3. 932 views
A downward force of 5.1 N is exerted on a -7.3 mcirco C charge. What is the magnitude of the electric field at this point?
1. 1 answer
2. asked by Heidi
3. 931 views
A friend gave me 1/2 a candy bar and i ate 1/5 of it. How much did she eat?
1. 3 answers
2. asked by daya
3. 923 views
A bat moving at 3.7 m/s is chasing a ﬂyinginsect. The bat emits a 36 kHz chirp and receives back an echo at 36.79 kHz. At what
1. 0 answers
2. asked by Anonymous
3. 922 views
Functional foods are those containing nutritionalsupplements in addition to natural nutrients. Examples include orange juice
1. 0 answers
2. asked by Nickie
3. 921 views
The three forces shown in the figure below act on a particle (with F1 = 50.0 N, F2 = 60.0 N, θ1 = 60.0°, and θ2 = 30.0°). If
1. 0 answers
2. asked by Nerise
3. 920 views
A sample of gas occupies 4 mL at STP. Atwhat pressure would this sample occupy 500 mL if the temperature is changed to 525�C?
1. 2 answers
2. asked by cheri
3. 908 views
A disc-shaped spinner has five sections with the following colors and central angles:Blue, 60; Red, 120; Green, 45; Red, 45; and
1. 1 answer
2. asked by Tina
3. 894 views
Two forces of magnitudes 60 Newtons and 80 Newtons make an angle of 30� with each other and areapplied to an object at the same
1. 1 answer
2. asked by Tricia
3. 891 views
I need to create a communication model in my speech class. My characters are Scout and Jem (TKAM) I need to write a
1. 6 answers
2. asked by Darcy
3. 880 views
a man has 3 unique coins such that the probability of obtaining a head when the coin is flipped is 1 10 , 2 10 and 3 10 ,
1. 3 answers
2. asked by Anonymous
3. 879 views
Find the initial concentration of NO2 if the concentration after 2.00 min is 0.113. k = 0.331 1/(M * s)2 NO2 (g) + N2 (g) --> 2
1. 4 answers
2. asked by Anna
3. 878 views
Hi, What is the most critical factor in setting up a goal based performance appraisal system?A. Choosing the most crical
1. 1 answer
2. asked by NeNe
3. 874 views
a wheel makes 8 1/10 revolutions per minute if it rotates for 85 mins. how many revolutions will it make
1. 1 answer
2. asked by melissa
3. 832 views
On a hot sunny day in August, the weather-man reports that the barometric pressure is 49 atm atmospheres. How many Pascals is
1. 2 answers
2. asked by cheri
3. 822 views
Question 3: What specific information does the compiler need to perform a successful function call?I figured it was just a
1. 0 answers
2. asked by Anonymous
3. 817 views
A container having a volume of 1 m3holds 90 mol of helium gas at 176 ◦ C. Boltzmann’s constant is 1.38 × 10 −23 J/K.
1. 1 answer
2. asked by Conor
3. 816 views
an aqueous solution contains 1 mol of S2O3 ions and this reduces 4 mol chlorine molecules.What is the sulphur containing product
1. 1 answer
2. asked by harish
3. 783 views
Can someone explain the Nernst Equation and its purpose, in as simple terms as possible? For some reason it's just not clicking
1. 3 answers
2. asked by t
3. 780 views
We mix 146 grams of oxygen gas with117 grams of argon gas in a volume of 436 mL at 58�C. What will be the final pressure of the
1. 1 answer
2. asked by cheri
3. 773 views
the width of a rectangle is 9 less than twice the length. if the area os the rectangle is 41cm^2 what is the length of the
1. 2 answers
2. asked by eddie
3. 770 views
Numerous studies have found that males report higherself-esteem than females, especially for adolescents (Kling, Hyde, Showers,
1. 0 answers
2. asked by Nickie
3. 763 views
Atdewberry Elementary there are 5 times as many boys than girls. Let (b) represent the number of boys. Which expression shows
1. 2 answers
2. asked by vera
3. 755 views
Let's solve this fun trigonometric fun math problem!1.) SEC²X-1/SIN²X
1. 1 answer
2. asked by AwesomeGuy
3. 753 views
points A,B,C and D lie on a straight line in the given order. AC=25cm and BD=46cm. the ratio of length CD to length AB is 5/2.
1. 1 answer
2. asked by Anonymous
3. 734 views
describe how you would prepare 500ml of a solution containing 0.025M sodium acetate and 0.001% w/v starch.
1. 1 answer
2. asked by Anonymous
3. 726 views
A microwave oven has a power requirement of 1256 W. A frozen dinner requires 4.0 min to heat on full power.(a) How much
1. 1 answer
2. asked by tyrone
3. 723 views
Two capacitors are identical, except that one is empty and the other is filled with a dielectric (k = 3.8). The empty capacitor
1. 0 answers
2. asked by Anonymous
3. 712 views
Mikayla, chief financial officer of Napoli Chocolate Company, adopts religious ethical standards. These involve an element of
1. 1 answer
2. asked by Anonymous
3. 709 views
Jeff and Jill go canoeing. While reaching to feed a duck, the boat flips. Jeff and Jill blowup their inflatable life preservers
1. 1 answer
2. asked by cheri
3. 706 views
For a field trip 22 students rode in cars, and the rest filled eleven buses. Which equations would you use to find how many
1. 3 answers
2. asked by vera
3. 688 views

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