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Questions Asked on September 26, 2010

20) The ideal value of i (van't Hoff factor) for (NH4)3PO4.A) 2 B) 5 C) 4 D) 3 E) 1 I know the answer but how are problems like
1. 5 answers
2. asked by Jessie
3. 18,229 views
If a rock is thrown upward on the planet Mars with a velocity of 10 m/s, its height in meters t seconds later is given by y =
1. 1 answer
2. asked by CMM
3. 8,381 views
a 1500 kg car accelerates from 0 to 25 m/s in 7.0 s. What is the average power delivered to the engine?
1. 4 answers
2. asked by shnook
3. 7,137 views
What is the freezing point (°C) of a solution prepared by dissolving 11.3 g of Ca(NO3)2(formula weight = 164 g/mol) in 115 g of
1. 3 answers
2. asked by jessie
3. 4,624 views
The rate constant for a reaction is 4.65 L mol-1s-1. The overall order of the reaction is:zero first second third I am having
1. 2 answers
2. asked by lucylu
3. 4,095 views
An unknown compound contains only carbon, hydrogen, and oxygen . Combustion of 2.50 g of this compound produced 3.67 g of carbon
1. 3 answers
2. asked by isoka
3. 3,871 views
At what points does the helix r = sin(t), cos(t), t intersect the sphere x 2 + y 2 + z 2 = 37? (Round your answers to three
1. 1 answer
2. asked by Anonymous
3. 3,789 views
The concentration (M) of HCl in a solution prepared by dissolving 5.5 g of HCl in 200 g of C2H6Ois ?????? M. The density of the
1. 2 answers
2. asked by benju
3. 3,679 views
A solution is prepared by dissolving 23.7 g of CaCl2 in 375 g of water. The density of the resultingsolution is 1.05 g/mL. The
1. 2 answers
2. asked by BenY
3. 3,599 views
a) Describe a graph for which the average rate of change is equal to instantaneous rate of change for its entire domain.
1. 1 answer
2. asked by Shaila
3. 3,590 views
The concentration of sodium chloride in an aqueous solution that is 2.23 M and that has a density of1.01 g/mL is __ % by mass.
1. 4 answers
2. asked by JBS
3. 3,525 views
45) George is making spaghetti for dinner. He places 4.01 kg of water in a pan and brings it to a boil.Before adding the pasta,
1. 3 answers
2. asked by hjw
3. 3,399 views
Working of a problem--I have found the mean, variance and the standard deviation from the following info:The probability that a
1. 2 answers
2. asked by Lori
3. 3,307 views
A football player, starting from rest at the line of scrimmage, accelerates along a straight line for a time of 1.5 s. Then,
1. 2 answers
2. asked by Amanda
3. 2,933 views
The molarity of urea in a solution prepared by dissolving 16 g of urea (MW = 60.0 g/mol) in 39 g ofH2O is __________ M. The
1. 2 answers
2. asked by BenY
3. 2,927 views
Calulate the wavelengths (in nm) of the visible lines in the line spectrum of hydrogen using the Rydberg equation (nf = 2; ni =
1. 2 answers
2. asked by Sarah
3. 2,899 views
the ratio of the distances a 7-iron and a 5- iron will dirve a golf ball is 5 to 6. if a golfer averages 153 yards with a 7-
1. 1 answer
2. asked by Anonymous
3. 2,842 views
Hey, I need help working these problems. Thanks you.1) A 50-m tape is used to measure between two points. The average weight of
1. 1 answer
2. asked by Mason
3. 2,767 views
three point charges are located at the corners of a right triangle where q1=q3= 5uC,Q2= -2uC and r =10cm.(angle q1 q2q3=90 and
1. 2 answers
2. asked by kevin
3. 2,599 views
a light house flashes every 56 seconds. Another lighthouse flashes every 40 seconds. At 9 p.m. they both flash t the same time.
1. 1 answer
2. asked by chelsea
3. 2,480 views
FeCo3Calculate the mass percent composition of iron for the third one of these iron ores.
1. 3 answers
2. asked by emily chambers
3. 2,098 views
A billiard ball of mass 0.55kg moves with a velocity of 12.5m/s towards a stationary billiard ball of the identical mass and
1. 2 answers
2. asked by Shaila
3. 2,097 views
The volume of .150 molar NaHCO3 solution that contains 6.30 g of Na2CO3 is...a. .200 L b. 0.400 L c. .500 L d. 1.60 L e. 2.5 L I
1. 1 answer
2. asked by Lucien
3. 2,020 views
How many grams of sucrose,C12H22O11 must be dissolved in 750.mL of water to prepare a 0.250 molal solution?
1. 4 answers
2. asked by india
3. 1,949 views
Two very small spheres are initially neutral and separated by a distance of 0.50 m. Suppose that 2.50 x 10^13 electrons are
1. 3 answers
2. asked by Melissa
3. 1,890 views
when did american economic institutions began to be shaped in a capitalist framework?A.during the colonial period B.during the
1. 4 answers
2. asked by lala
3. 1,886 views
The vapor pressure of liquid chloroform, CHCl3, is 400.0 torr at 24.1 degrees Celsius and 100.0 torr at -6.3 degrees Celsius.
1. 4 answers
2. asked by Patrick
3. 1,841 views
Looking to increase the profits of his lemonade stand, Johann doubled the price of a cup of lemonade from 25 cents to 50 cents.
1. 2 answers
2. asked by jrhargr
3. 1,816 views
A 1.500-g sample of a mixture containing only Cu2O and CuO was treated with hydrogen to prduce 1.252 g pure copper metal.
1. 1 answer
2. asked by kelly
3. 1,804 views
A student takes a 20-question, true/false exam and guessed on each question. Find the probability of passing if the lowest
1. 1 answer
2. asked by Lori
3. 1,768 views
How would you usually prepare starch indicator solution for iodine titrations? Can the solution be stored for a few months in
1. 1 answer
2. asked by annie
3. 1,698 views
Which of these gasses are outgased by our volcanic eruptions?a)oxygen, methane,ammonia b)carbon dioxide, water vapor, oxygen
1. 1 answer
2. asked by Jerrika
3. 1,667 views
If the total mass of a vehicle is due to 56Fe, what mass of a 1.4 metric ton (tonne) automobile is due to the electrons?
1. 1 answer
2. asked by ducky
3. 1,665 views
11. As a teacher aide in an ESL classroom, it’s within your responsibilities toA. meet with parents one-on-one to discuss
1. 7 answers
2. asked by AspiringTeacherandMotherofFour
3. 1,633 views
Assume that about 45% of all U.S. adults try to pad their insurance claims. Suppose that you are the director of an insurance
1. 2 answers
2. asked by Randy
3. 1,604 views
A solution is prepared by dissolving 15.0 g of NH3 in 250 g of water. The density of the resulting solution is0.974 g/mL. The
1. 1 answer
2. asked by Jessie
3. 1,585 views
A stone thrown off a bridge 20 m above a river has an initial velocity of 12 m/s at an angle of 450 above the horizontal.a. What
1. 1 answer
2. asked by Val
3. 1,575 views
A baseball (m = 145 g) traveling 45 m/s moves a fielder's glove backward 15 cm when the ball is caught. What was the average
1. 1 answer
2. asked by mas
3. 1,547 views
How do frequency tables, relative frequencies, and histograms showing relative frequencies help us understand sampling
1. 4 answers
2. asked by Randy
3. 1,521 views
A mixture of acetone and ethyl acetate of unknown ratio begins to boil at 65 degrees celcius (760 torr). What is the composition
1. 1 answer
2. asked by doug
3. 1,479 views
A 2.9-L sample of paint that has a density of 4.65 g/mL is found to contain 26.7 g Pb3N2(s). How many grams of lead were in the
1. 1 answer
2. asked by caroline
3. 1,461 views
A vertical spring (ignore its mass), whose spring stiffness constant is 1000 N/m, is attached to a table and is compressed down
1. 2 answers
2. asked by mas
3. 1,439 views
Dinitrogen tetraoxide, N2O4, decomposes to nitrogen dioxide, NO2, in a first-order process.If k = 2.5 x 103 s-1 at -5° Cand k =
1. 1 answer
2. asked by lucylu
3. 1,419 views
Use a table of values to estimate the value of the limit.lim (tan 3x/tan 5x) x--> 0 I have no clue what to do. Could someone
1. 1 answer
2. asked by CMM
3. 1,399 views
I am reviewing the Gutierrez Map and I need to know, what does this mean: How might the map’s indication of where Native
1. 5 answers
2. asked by Suzanne
3. 1,355 views
1. Which of the following sentences contains an implied metaphor?a. The mall sailboat bobbed about like a cork on the huge ocean
1. 11 answers
2. asked by mysterychicken
3. 1,346 views
Write each of the fractions in their decimal form and then arrange them from the smallest to the biggest.2/3 3/5 31/50 67/100
1. 3 answers
2. asked by Kathleen
3. 1,327 views
I am thinking of a three-digit number. If you subtract 5 from it, the result is divisible by 5. If you subtract 6 from it, the
1. 1 answer
2. asked by Anthony
3. 1,321 views
Examine the three samples listed here. Without performing any calculations, indicate which sample has the largest amount of
1. 2 answers
2. asked by Rhea
3. 1,256 views
Is rubbing alcohol a pure substance or a mixture?
1. 1 answer
2. asked by Erika
3. 1,250 views
which indicator is more reliable in the titration of H3PO4 with NaOH using methyl orange and phenolphthalein as indicators
1. 2 answers
2. asked by gina
3. 1,229 views
Hydrogen cyanide, HCN, can be made by a two-step process. First, ammonia is reacted with O2 to give nitric oxide, NO.4 NH3(g) +
1. 2 answers
2. asked by caroline
3. 1,213 views
Lead has four stable isotopes. ^204Pb (1.4%), ^206Pb (24.1%). ^207Pb (22.1%) and ^208Pb (52.4%). Find the atomic mass of ^208 Pb
1. 1 answer
2. asked by Gigi
3. 1,209 views
A statistics practitioner determined that the mean and standard deviation of a data set were 120and 30, respectively. What can
1. 2 answers
2. asked by Rhea
3. 1,209 views
The burning of the magnesium becomes uncontrolled (its burns brightly). Oops! How will this procedural error affect the reported
1. 3 answers
2. asked by autum
3. 1,203 views
Jane, looking for Tarzan, is running at top speed (4.3 m/s) and grabs a vine hanging vertically from a tall tree in the jungle.
1. 1 answer
2. asked by mas
3. 1,193 views
13. In an ESL classroom, teacher aides should prepare themselves toA. learn or become familiar with appropriate language-related
1. 5 answers
2. asked by AspiringTeacherandMotherofFour
3. 1,148 views
Help! i am having trouble finding the order pair for the first pair I have (0,-12), but I am not sure this is correct9x-4y= -12
1. 1 answer
2. asked by jean
3. 1,143 views
Does anyone know where to find facts about iced tea powder? ex. who made it, where did it come from, anything!
1. 2 answers
2. asked by Anya
3. 1,138 views
What are the key elements of the scientific method and how dose this method relate to economic principles and laws?
1. 0 answers
2. asked by Alex
3. 1,130 views
What is the empirical formula of a substance that contains 8.33×10−2 mol of carbon, 0.167 mol of hydrogen, and 8.32×10−2
1. 1 answer
2. asked by Anonymous
3. 1,124 views
______________ is the process of naming broad product-markets and then segmenting these broad product-markets in order to select
1. 3 answers
2. asked by Anonymous
3. 1,114 views
How did civilized culture survive the rise and fall of regional states?
1. 4 answers
2. asked by Christina
3. 1,110 views
8. In general, the best type of multicultural classroom materials are those thatA. demonstrate stereotypes of other biased
1. 8 answers
2. asked by AspiringTeacherandMotherofFour
3. 1,103 views
I'm trying to calculated the rate of reactionIn this lab I took a 50 mL beaker and poured in 10 ml of cold distilled water into
1. 0 answers
2. asked by Kate
3. 1,094 views
An insurance company insures a person's antique coin collection worth $20,000 for an annual premium of $300. If the company
1. 0 answers
2. asked by Lori
3. 1,082 views
Can someone please answer my question it is the other one named algbra honurs i am kinda new to this website so i don't know if
1. 1 answer
2. asked by Jacytiopa (i know its weird but my mom picked it
3. 1,064 views
Can you help me checked if the following sentences are grammatically correct? Thank you very much.1) On what condition can
1. 1 answer
2. asked by Franco
3. 1,058 views
What are some of the social issues in today's society?I'm supposed to make an Advocacy speech to effect positive changes on a
1. 1 answer
2. asked by Alex
3. 1,056 views
Calculate the first, second, and third quartiles of the following sample.2 2 3 3 4 4 4 5 5 5 7 7 8 9 10 Are my answers correct:
1. 1 answer
2. asked by Rhea
3. 1,056 views
Two trucks, 300 km apart, are on a head-on collision course with one another. The first truck is movingat 100 m/s and the other
1. 2 answers
2. asked by Amie
3. 1,056 views
An insurance company insures a person's antique coin collection worth $20,000 for an annual premium of $300. If the company
1. 2 answers
2. asked by Lori
3. 1,049 views
A paralegal quits the firm of Johnson & Johnson. When she leaves, she takes client documents she prepared while at the firm. The
1. 1 answer
2. asked by TK
3. 1,028 views
An automobile with an initial speed of 4.56m/s accelerates uniformly at the rate of 2.4 m/s2. Find the final speed of the car
1. 0 answers
2. asked by Taylor
3. 1,005 views
A woman who recently came home from a tropical vacation now has abdominal pain and diarrhea. Her blood test results how an
1. 1 answer
2. asked by Nikki
3. 998 views
1-AND PRODUCTION sum of roots of the equation :X²-X-6=02-FOR what values of A the equation has no solution ax ² +3 x-7 = 0
1. 3 answers
2. asked by Anonymous
3. 987 views
In a standard Normal model, what value of z cut off the region described as the lowest 1.5%?
1. 1 answer
2. asked by Jamie
3. 958 views
A baseball (m = 145 g) traveling 45 m/s moves a fielder's glove backward 15 cm when the ball is caught. What was the average
1. 0 answers
2. asked by mas
3. 945 views
How do I make a title Page??? Thanks :)
1. 2 answers
2. asked by I NEED HELP NOW!!:)
3. 944 views
he Oil Price Information Center reports the mean price per gallon of regular gasoline is $ 3.79 with a population standard
1. 1 answer
2. asked by John
3. 936 views
A video game store charges a monthly membership fee of $7.50 but the charge to rent each movie is only $1.00 per movie. Another
1. 2 answers
2. asked by jose
3. 935 views
how many moles of oxygen (molecule) are required for complete reaction with 2.1080 moles of iron?
1. 1 answer
2. asked by Anonymous
3. 933 views
How is the average mass of a penny related to average atomic mass?
1. 1 answer
2. asked by Gigi
3. 925 views
A sled is initially given a shove up a frictionless 27.0° incline. It reaches a maximum vertical height 1.45 m higher than
1. 0 answers
2. asked by mas
3. 907 views
In the equation ax - x = c what is x i did it so far but i need help this is what i got so far ax - x + x = 9 + x ax/a = c+x/a
1. 1 answer
2. asked by Jacytiopa (i know its weird but my mom picked it)
3. 905 views
this is a text book question that i cannot figure out.the decomposition of dimethyl ether at 510 degrees is a first-order
1. 1 answer
2. asked by lucylu
3. 896 views
Could someone help me with this questionSimplify the rational expression. (3x^2y+9xy^2-12y^3)/(36x^3y-27x^2y^2-9xy^3)
1. 0 answers
2. asked by Alex
3. 886 views
explain how evaluation and management (EM) codes are grouped
1. 0 answers
2. asked by given
3. 878 views
canu show me how to do scribble hatchimg
1. 4 answers
2. asked by Anonymous
3. 863 views
The velocity vefot of a ball is v(t)=-3x+4y at any time. Its initial position is r=12x-4y. The components of the velocity vector
1. 0 answers
2. asked by Sarah
3. 862 views
The forensic technician at a crime scene has just prepared a luminol stock solution by adding 11.0 of luminol into a total
1. 2 answers
2. asked by Anonymous
3. 861 views
Need help working this problem. Thanks in advance!1) A 50-m tape is used to measure between two points. The average weight of
1. 1 answer
2. asked by Mason
3. 860 views
Aluminum metal reacts with iron(III) oxide to produce aluminum oxide and iron metal.(a) How many moles of Fe2O3 are required to
1. 1 answer
2. asked by caroline
3. 848 views
include a discussion of sentence variety and the rhythm of the author's writing about Individuals can be denied credit for a
1. 1 answer
2. asked by jo
3. 839 views
A car is driven 165 km west and then 25 km southwest. What is the displacement of the car from the point of origin (magnitude
1. 2 answers
2. asked by Carol
3. 825 views
You step onto a hot beach with your bare feet. A nerve impulse, generated in your foot, travels through your nervous system at
1. 3 answers
2. asked by Amanda
3. 822 views
how to clearing decimals multiplying by 10
1. 1 answer
2. asked by frances
3. 810 views
An arrow, starting from rest, leaves the bow with a speed of 16.5 m/s. If the average force exerted on the arrow by the bow were
1. 0 answers
2. asked by help
3. 803 views
why do we use reciprocal in math?
1. 1 answer
2. asked by marie
3. 791 views
what fraction of the total mass of an 56Fe atom is due to the electrons?
1. 0 answers
2. asked by ducky
3. 785 views

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