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2010
February

Questions Asked on February 10, 2010

1. Which of the following statements about the cell theory is correct?a) All living organisms are made up of one or more cells.
1. 17 answers
2. asked by jen
3. 8,254 views
A piano tuner hears one beat every 2.8 s when trying to adjust two strings, one of which is sounding 440 Hz, so that they sound
1. 1 answer
2. asked by DJ
3. 3,947 views
The ratio of the angle measures of a pentagon is 4:5:3:8:7. What is the measure of the smallest angle?
1. 4 answers
2. asked by chelsea
3. 3,439 views
When surface water dissolves carbon dioxide, carbonic acid (H2CO3) is formed. When the water moves underground through limestone
1. 4 answers
2. asked by kat
3. 2,875 views
A sloution of calcium nitrate, C(NO3), reacts with a solution of ammonium fluoride, NH4F, to form solid calcium fluoride, CaF2,
1. 3 answers
2. asked by Macey
3. 2,866 views
Solutions are made that contain 0.1 moles of each of the following compounds below in 100 g of H2O. Choose the compound whose
1. 1 answer
2. asked by Angel
3. 2,643 views
A 6.00 M H2SO4 solution has d = 1.34 g/mL. What is the mass percent of H2SO4 in this solution?
1. 2 answers
2. asked by cc
3. 2,619 views
1) use the properties of logarithms to simplify the logarithmic expression.log base 10 (9/300) log - log 300 log 9 = 2 log 3 log
1. 2 answers
2. asked by Hannah
3. 2,566 views
Calculate the molality of methanol in a solution prepared by dissolving 75.0 mL of methanol, CH3OH (d = 0.791 g/mL), in 150 g of
1. 3 answers
2. asked by CC
3. 2,545 views
Benzene has a heat of vaporization of 30.72 kj/mol and a normal boiling point of 80.1 degrees celcius.At what temperature does
1. 2 answers
2. asked by Joseph
3. 2,437 views
Ethanol has a heat of vaporization of 38.56 KJ/Mol. And a normal boiling point of 78.4 degrees celcius.WHAT is the vapor
1. 3 answers
2. asked by Joseph
3. 2,379 views
Which bear has the greater average velocity over the entire period? Which bear has the greater velocity at t = 8.0 min? Is the
1. 1 answer
2. asked by christian
3. 2,339 views
The reaction2NOCl(g) �¨ 2NO(g) + Cl2 (g) has an activation energy of 100.0 kJ/mol and a rate constant at 350.0 K of 8.5 x 10-6
1. 2 answers
2. asked by G-Unit 32
3. 2,291 views
The length of a rectangular swimming pool is 6 feet more than twice its width. Find the length and width of the pool if its
1. 4 answers
2. asked by Taylor
3. 2,123 views
Put the following in order in terms of increasing melting point: SiH4, SiO2, CH4, NH3, PH3.Lowest → Highest (A) NH3, PH3, CH4,
1. 2 answers
2. asked by LeePyeong
3. 1,943 views
which of the following terms best describes the music of the classical period.a. polyphony b. irregular metrical patterns c.
1. 4 answers
2. asked by nikki
3. 1,906 views
What is the molality of a solution prepared by dissolving 2.00 mL of bromine (d = 3.103 g/mL) in 125 mL acelic acid, HC2H3O2 (d
1. 3 answers
2. asked by CC
3. 1,875 views
I try to write a summary for Mañana de Sol. So, can anyone please check my grammar and vocabulary? Thank you!“Mañana de
1. 2 answers
2. asked by Jenny
3. 1,830 views
Benzene has a heat of vaporization of 30.72 kj/mol and a normal boiling point of 80.1 degrees celcius.At what temperature does
1. 2 answers
2. asked by Joseph
3. 1,785 views
A resistor has a resistance R, and a battery has an internal resistance r. When the resistor is connected across the battery,
1. 2 answers
2. asked by ALan
3. 1,745 views
Suppose a family has 5 children. Suppose the probability of having a girl is 1/2. find the probability that the family has
1. 2 answers
2. asked by Maria
3. 1,740 views
TO WHAT SPEED MUST AN ELECTRON BE ACCELERATED FOR IT TO HAVE A WAVELENGTH OF 3.0CM?
1. 1 answer
2. asked by DIANA
3. 1,715 views
The decomposition of ammonium hydrogen sulfide that is shown below is an endothermic process.NH4HS(s) reverse reaction arrow
1. 1 answer
2. asked by Anonymous
3. 1,699 views
Angles 1 and 7 are alternate exterior angles of a transversal cutting two parallel lines. If m(angle1)=4x+10 and m(angle7)=6x+4,
1. 2 answers
2. asked by nicole
3. 1,675 views
Three numbers are in the ratio of 3:5:7. If the largest number is multiplied by 3, the result is 26 more than the sum of the
1. 4 answers
2. asked by Camile
3. 1,661 views
1. The atomic number of carbon is 6. Its nucleus must contain:a) 6 neutrons and 6 protons. b) 3 protons and 3 neutrons. c) 6
1. 2 answers
2. asked by cassie
3. 1,661 views
The manager of a service station is in the process of analyzing the number of times car owners change the oil in their cars. She
1. 3 answers
2. asked by iyra
3. 1,547 views
From the following: 1) pure water 2) 0.01 m solution of table sugar (C12H22O11) 3) 0.01 m solution of NaCl 4) 0.01 m solution of
1. 2 answers
2. asked by CC
3. 1,534 views
Calculate the molarity of a solution containing 40.0 g glucose (C6H12O6) in enough ethanol (C2H5OH) to make 40.0 mL of solution.
1. 1 answer
2. asked by CC
3. 1,488 views
What items appear in financial statements of merchandising companies that do not appear in the financial statements of service
1. 1 answer
2. asked by Anonymous
3. 1,473 views
A line segment that is 2 4/8 inches long, how many half inches is it?
1. 4 answers
2. asked by elias
3. 1,434 views
What are the fundamental differences between Western philosophies and Eastern ways of knowing? (Generally, how does each culture
1. 1 answer
2. asked by asma
3. 1,428 views
Suppose that one in every 100 people in a certain community is infected with HIV. You want to indentify an HIV-positive person
1. 0 answers
2. asked by stats
3. 1,412 views
The great pyramid of Giza was built around 2560 BC. It was originally 481ft high with a square base measuring 751 ft on each
1. 1 answer
2. asked by rmz
3. 1,381 views
Angles 1 and 7 are alternate exterior angles of a transversal cutting two parallel lines. If m(�Ú1)=4x+10 and m(�Ú7)=6x+4,
1. 1 answer
2. asked by nicole
3. 1,363 views
The key element in developing a pro forma statement is?
1. 1 answer
2. asked by Terri
3. 1,358 views
A 0.750 g sample of an unknown substance is dissolved in 20.0 g of benzene, C6H6. The freezing point of the solution is 4.53 oC.
1. 1 answer
2. asked by CC
3. 1,355 views
The tourist industry is subject to enormous seasonal variation. A hotel in North Queensland has recorded its occupancy rate for
1. 2 answers
2. asked by danial
3. 1,329 views
A 0.750 g sample of an unknown substance is dissolved in 20.0 g of benzene, C6H6. The freezing point of the solution is 4.53 oC.
1. 2 answers
2. asked by CC
3. 1,318 views
Write an equation to show the dissolving of the following substance in water.(NH4)2SO4(s) NH42SO4 + H2O -> 2NH4 + SO4 + H^+ +
1. 4 answers
2. asked by sh
3. 1,290 views
I need help forming an equation for this word problem..A long distance phone company charges $0.027 per minute and a $2 monthly
1. 3 answers
2. asked by lea
3. 1,276 views
describing the function and importance of the four external and six internal considerations for developing an integrated
1. 2 answers
2. asked by tee
3. 1,270 views
A 2.30 m solution of urea (CO(NH2)2; FW= 60.0) in water has a density of 1.14 g/mL. Calculate the percent mass of urea in this
1. 1 answer
2. asked by cc
3. 1,264 views
I try to write a summary for Mañana de Sol. So, can anyone please check my grammar and vocabulary? Thank you!“Mañana de
1. 1 answer
2. asked by Jenny
3. 1,231 views
I have a questions please1.An inappropriate science activity for a toddler would be:A:reporting the weather B:caring for pets of
1. 2 answers
2. asked by Barb
3. 1,230 views
A sloution of calcium nitrate, C(NO3), reacts with a solution of ammonium fluoride, NH4F, to form solid calcium fluoride, CaF2,
1. 2 answers
2. asked by Macey
3. 1,230 views
Choose one from the ().A bell (lays or lies) on it's side. Which one??
1. 2 answers
2. asked by sierra (6th grade)
3. 1,225 views
Last year you mowed grass and shoveled snow for 10 households. You earned $200 per household mowing for the entire season & $180
1. 1 answer
2. asked by Annie
3. 1,220 views
In the short story Homeless by Anna Quindlen what distinction is she making in hjer conclusion with the sentences "They are not
1. 1 answer
2. asked by Renee
3. 1,212 views
How would you work this...You are facing north. You turn 270 degrees counterclockwise. Which direction are you facing? Is it
1. 1 answer
2. asked by Kevin
3. 1,196 views
a man carries a load of 50 kg to a height of 15 m in 5 minutes. calculate the work load?
1. 1 answer
2. asked by binz
3. 1,172 views
In each sentence, if the italicized verb does not agree with the subject, circle the verb and write it correct form.I will
1. 7 answers
2. asked by Shadow
3. 1,172 views
Find f'(c) if f(x)=-3e^(x+2)+ e^(-5)[NOTE:A small algebraic manipulation is needed first to get f(x) into a form so that the
1. 2 answers
2. asked by engmath
3. 1,160 views
Ethanol has a heat of vaporization of 38.56 KJ/Mol. And a normal boiling point of 78.4 degrees celcius.WHAT is the vapor
1. 3 answers
2. asked by Joseph
3. 1,150 views
What is the difference between and equation and an expression? Include an example of each. Can you solve for a variable
1. 0 answers
2. asked by Michelle
3. 1,144 views
who signed the declaration of independence?
1. 4 answers
2. asked by mary
3. 1,141 views
A 2.30 m solution of urea (CO(NH2)2; FW= 60.0) in water has a density of 1.14 g/mL. Calculate the percent mass of urea in this
1. 3 answers
2. asked by cc
3. 1,129 views
Which of the following is NOT true?(A) CH2O Has a relatively high boiling point due to hydrogen bonding. (b) BaCl2 is an example
1. 1 answer
2. asked by Bouforyou
3. 1,128 views
Please help !!!!Is anyone know what are two side reactions that could occur in the Diels-Alder Reaction of Cyclopentadiene with
1. 1 answer
2. asked by Amanda
3. 1,122 views
In a local cellular phone area, company A accounts for 70% of the cellular phone market, while company B accounts for the
1. 1 answer
2. asked by iyra
3. 1,121 views
hello i just want a answer in these question:please. im begging! I. Use Newton’s method to approximate the real root to 4
1. 5 answers
2. asked by kookay
3. 1,107 views
do esterification reactions have high or low yields? and why is this?
1. 1 answer
2. asked by chrissy
3. 1,105 views
How do I solve this equation the find te slope of the line? Please show me the steps in solving this equation.
1. 2 answers
2. asked by sherry
3. 1,102 views
Consider the unbalanced equation: Na+Cl2 = NaCl. What mass of NaCl can be produced from 25.0 grams of Chlorine?
1. 3 answers
2. asked by Bella
3. 1,097 views
A recent article in a computer magazine suggested that the mean time to fully learn a new software program is 40 hours. A sample
1. 1 answer
2. asked by Janice
3. 1,092 views
Deternime the instantaneous rate of change at x=2 for:y=x-2x^3
1. 1 answer
2. asked by -
3. 1,092 views
The data below represents the amount of grams of carbohydrates in a sample serving of breakfast cereal.10 18 24 30 19 22 24 20
1. 1 answer
2. asked by iyra
3. 1,079 views
A 6.00 M H2SO4 solution has d = 1.34 g/mL. What is the mass percent of H2SO4 in this solution?Choose one answer. a. 56.1 b. 43.9
1. 1 answer
2. asked by CC
3. 1,068 views
If I loaned someone $5000 four years ago at an interest rate of 5%, how much do they owe me now?
1. 1 answer
2. asked by Gary
3. 1,068 views
which one of the following terms best describes the music the classical period
1. 1 answer
2. asked by nikki
3. 1,054 views
Are my answers right please?1. Hot dogs come 10 to a package, and hot dog buns come 8 to a package. What is the smallest number
1. 1 answer
2. asked by Jimmy
3. 1,049 views
Butanone, CH3CH2COCH3, has a vapor pressure of 100. Torr at 25°C; at the same temperature, propanone, CH3COCH3, has a vapor
1. 1 answer
2. asked by Cairy
3. 1,005 views
10point on social and economic value of Ife art
1. 1 answer
2. asked by Echetabu
3. 997 views
Does the medium in which a wave travels move along with the wave itself.I think the answer is no, but why?
1. 4 answers
2. asked by sh
3. 992 views
How many excess electrons must be distributed uniformly within the volume of an isolated plastic sphere 28.0 in diameter to
1. 2 answers
2. asked by How many excess electrons must be distributed unif
3. 984 views
one foot is what fraction of a yard
1. 1 answer
2. asked by tracy
3. 968 views
What does the word "hymnals" mean????
1. 1 answer
2. asked by sierra (6th grade)
3. 954 views
A 2.30 m solution of urea (CO(NH2)2; FW= 60.0) in water has a density of 1.14 g/mL. Calculate the percent mass of urea in this
1. 1 answer
2. asked by CC
3. 947 views
The last-place finisher in the 2006 Nissan Golf Tournament won $9,078. How many tournaments would a person earning this much
1. 4 answers
2. asked by kim
3. 945 views
Refer to the following table which contains the sales (in $,000) for a department store for the first ten months of the year.Mon
1. 2 answers
2. asked by iyra
3. 942 views
How do I write the Competency Goal Statements? To establish and maintain a safe, healthy learning environment Please I need Help
1. 1 answer
2. asked by Rosa
3. 927 views
to Steve go City College.Steve goes to city college.is that right?
1. 2 answers
2. asked by raj
3. 926 views
Find the slope of a line perpendiculat to the line y=1/2x+7
1. 1 answer
2. asked by RERE
3. 923 views
Please help !!!!In addition to the main product what are two side reactions that could occur in the experiment of The
1. 0 answers
2. asked by Amanda
3. 921 views
Some properties of the two compounds are listed below:Melting point- Compound X= -114*C Compound Y= -138*C Boiling Point-
1. 1 answer
2. asked by LeePyeong
3. 921 views
From the following:1) pure water 2) 0.01 m solution of table sugar (C12H22O11) 3) 0.01 m solution of NaCl 4) 0.01 m solution of
1. 1 answer
2. asked by CC
3. 919 views
An insurance company wishes to examine the relationship between income (in $,000) and the amount of life insurance (in $,000)
1. 1 answer
2. asked by iyra
3. 906 views
do esterification reactions have high or low yields? and why is this?
1. 1 answer
2. asked by chrissy
3. 905 views
LiI(s) → Li+(aq) + I‾ (aq)Solid LiI dissolves as shown in the above equation. A 8.00 g sample of LiI was dissolved in 57.5 g
1. 1 answer
2. asked by Sug
3. 896 views
For the given functions, write the rational function,r(x) = [f(x-h)-f(x)]/h and simplify: a. F(x) = 2x+3 b. F(x) = 1/(x+1) c.
1. 3 answers
2. asked by Anonymous
3. 894 views
In what ways might a devil's advocate hinder the group process? What other strategies can help reduce groupthink?
1. 1 answer
2. asked by CASSANDRFA
3. 893 views
the benefits of music
1. 1 answer
2. asked by Anonymous
3. 883 views
Provide examples of effective classroom-management strategies for each category.The categories are Classroom Expectations and
1. 2 answers
2. asked by scooby
3. 873 views
a man of mass 80kg standing on a stationary frictionless trolley of mass 60kg has in his hands a parcel of mass 10 kg.He throws
1. 2 answers
2. asked by Anonymous
3. 865 views
1) Evaluate (if possible) the sine, cosine, and tangent of the angles without a calculator.a) 10pi/3 Sin = -sqrt 3/2 Cos = -1/2
1. 1 answer
2. asked by Hannah
3. 863 views
Which is more important to the success of a presentation - good content or good delivery?
1. 1 answer
2. asked by Bryan
3. 855 views
What famous founder rejected the Constitution?
1. 2 answers
2. asked by Diane
3. 850 views
A fireman 46.0 m away from a burning building directs a stream of water from a ground-level fire hose at an angle of 30.0°
1. 1 answer
2. asked by mel
3. 843 views
When surface water dissolves carbon dioxide, carbonic acid (H2CO3) is formed. When the water moves underground through limestone
1. 1 answer
2. asked by kat
3. 841 views
Estimate the instantaneous rate of change for x=2 fory=x y=x^2 y=7
1. 1 answer
2. asked by -
3. 838 views

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