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Questions Asked on December 6, 2010

Diethyl ether has a boiling point of 34.5C, and 1-butanol has a boiling point of 117C. Both of these compounds have the same
1. 2 answers
2. asked by Sara
3. 6,764 views
What is the molarity of the resulting solution when 300. mL of a 0.400 M solution is dilutedto 800. mL?
1. 1 answer
2. asked by Ivy
3. 6,016 views
Find the percent by mass of sodium chloride in a 1.35 M NaCl solution. The density of the solution is 1.06 g/mL..............how
1. 1 answer
2. asked by wade
3. 4,779 views
Two identical containers are open at the top and are connected at the bottom via a tube of negligible volume and a valve which
1. 1 answer
2. asked by maria
3. 4,701 views
A 650 N boy and a 490 N girl sit on a 150 N porch swing that is 1.70 m long. If the swing is supported by a chain at each end,
1. 6 answers
2. asked by Jennifer
3. 4,542 views
an auditorium has 50 rows of seats. THe first row has 20 seats, the row has 21 seats, the third row has 22 seats, and so on.
1. 4 answers
2. asked by Brittni
3. 4,406 views
What is the concentration of a H2SO4 solution if 10.0 mL of the solution is neutralized by7.8 mL of a 0.20 M NaOH solution?
1. 1 answer
2. asked by Ivy
3. 4,286 views
What volume of a concentrated HCl solution, which is 36.0% HCl by mass and has a density of 1.179 g/mL, should be used to make
1. 2 answers
2. asked by Stacy
3. 3,497 views
how many grams of Na2CO3 must be dissolved into 155 g of water to create a solution with the molality of 8.20 mol/kg?
1. 1 answer
2. asked by william
3. 3,276 views
If wind blows at a speed of 30 m/s over the roof of your house, what is the pressure diference on your roof between the air
1. 3 answers
2. asked by Katie
3. 3,092 views
What mass of silver nitrate is dissolved in 40.0 mL of a 0.400 M solution of silver nitrate?
1. 1 answer
2. asked by Ivy
3. 2,919 views
A rectangular skating rink measuring 30m by 20m is doubled in area by adding a strip at one end of the rink and a strip fo the
1. 1 answer
2. asked by tina
3. 2,420 views
What happens to the sample's reported water content if the salt decomposes yielding a volatile product?If the water is not
1. 2 answers
2. asked by Allison
3. 2,342 views
The melting point of aspirin : 128-137Celsius degree.The melting point of the crude aspirin was measured to be 128 Celsius
1. 1 answer
2. asked by Cynthia
3. 2,308 views
Suppose a monatomic ideal gas is changed from state A to state D by one of the processes shown on the PV diagram. Find the total
1. 1 answer
2. asked by Dan
3. 2,290 views
The free-fall acceleration on Mars is 3.7 m/s2.(a) What length pendulum has a period of 4 s on the earth? cm What length
1. 1 answer
2. asked by Anonymous
3. 2,286 views
The Probability of drawing two black balls in succession from a bag containing 4 red and 3 black balls when the ball first drawn
1. 1 answer
2. asked by viru
3. 2,207 views
A 500 g block is released from rest and slides down a frictionless track that begins h = 1.70 m above the horizontal, as shown
1. 1 answer
2. asked by Anonymous
3. 2,175 views
Which of the following gases would you keep in an outdoor storage tank in winter?Explain why. methane(CH4), Propane(C3H8), or
1. 2 answers
2. asked by Sara
3. 2,168 views
4. <11{1[2(06)06]}> Reporter: A new campaign finance reform bill being considered by Congress would limit the amount of campaign
1. 4 answers
2. asked by Susan
3. 1,903 views
A sealed flask contains 0.60 g of water at 28 degrees celcius. The vapor pressure of water at this temperature is 28.36 mmHg.Wha
1. 2 answers
2. asked by BillNyeTheScienceGuy
3. 1,855 views
A 75-kg person on skis is going down a hill sloped at 30.0°. The coefficient of kinetic friction between the skis and the snow
1. 2 answers
2. asked by Bob
3. 1,832 views
Suppose two dice (one red, one green) are rolled. Consider the following events.A: the red die shows 5. B: the numbers add to 4.
1. 1 answer
2. asked by Liz
3. 1,779 views
The side of a square equals the length of a rectangle. The width of the rectangle is 4 meters longer than its length. The sum of
1. 2 answers
2. asked by Scott
3. 1,767 views
(Questions 6 and 7) For the following elements list the electron configuration.Assume it is neutral and in its ground state. 6.
1. 1 answer
2. asked by Jay
3. 1,608 views
block a of mass 4kg is on a horizontal, frictionless tabletop and is placed against a spring of negligible mass and spring
1. 1 answer
2. asked by kim
3. 1,572 views
A wagon with a weight of 300N is accelerated across a level surface at 0.5 m/s . What net force acts on the wagon
1. 1 answer
2. asked by BJ
3. 1,564 views
The time it takes for an object dropped from the top of cliff A to hit the water in the lake below is twice the time it takes
1. 1 answer
2. asked by Tiffany
3. 1,557 views
If the voltage V, in an electric circuit is held constant,the current,I,is inversely proportional to the resistance,R. If the
1. 1 answer
2. asked by jitka
3. 1,554 views
To conduct a scientific experiment, students need to mix 90 mL of a 3% acid solution. They have a 1% and a 10% soulution
1. 1 answer
2. asked by James
3. 1,480 views
Assignment for week 5Given the following information, draw the project network. Compute the early, late and slack times for the
1. 1 answer
2. asked by Gloria
3. 1,468 views
Analyze x²-6x-5y=1. Determine the vertex, focus, directrix, intercepts, axis of symmetry, and at least 2 other points on the
1. 2 answers
2. asked by Angel
3. 1,439 views
Describe the spectrum of the light from a fluorescent lamp and from an incandescent (tungsten filament) lamp, and try to explain
1. 1 answer
2. asked by Jon
3. 1,435 views
A 20.0 Ml sample of sulfuric acid is titrated with 25.0 ML of 1.0 M NaOH solution. What is the molarity of the sulfuric acid?
1. 1 answer
2. asked by Sa ndra
3. 1,426 views
Consider the following chemical equation.MnCl2(s) + H2SO4(aq) → MnSO4(aq) + 2 HCl(g) How many grams of manganese(II) chloride
1. 2 answers
2. asked by Kalen
3. 1,398 views
A study was conducted to investigate the relationship between the cost, y (in tens of thousands of dollars), per unit of
1. 1 answer
2. asked by edwin
3. 1,389 views
The sum of two numbers is 44. The second number is 5 more than twice the first. Find the numbers.x+y=44 2x+5y Is this correct?
1. 2 answers
2. asked by Julie JAM
3. 1,349 views
Acetylsalicyclic Acid, HC9H704, is the active component is aspirin. Two extra strength aspirin tablets, each containing 500 mg
1. 6 answers
2. asked by Symone
3. 1,333 views
Figure 11-50 shows two examples of SHM, labeled A and B. (The vertical axis is marked in increments of 0.5 m and the horizontal
1. 2 answers
2. asked by Anonymous
3. 1,300 views
At the melting point of benzene, the DH of fusion is 9.95 kJ/mol and the DS offusion is 35.7 J/K.mol. What is the temperature at
1. 1 answer
2. asked by Ashley
3. 1,260 views
A driver is running 3.6 m/s and dives out horizontally from the edge of a vertical cliff and reaches the water below 2.0s later.
1. 1 answer
2. asked by Catherine
3. 1,258 views
How many grams of sodium carbonate must be added to 2.50 kg of water in order to lower the freezing point of the resulting
1. 0 answers
2. asked by sfs
3. 1,257 views
A venturi meter is a device for measuring the speed of a fluid within a pipe. The drawing shows a gas flowing at a speed v2
1. 2 answers
2. asked by johnny
3. 1,252 views
Use the derivative to determine whether the function is strictly monotonic on its entire domain and therefore has an inverse
1. 1 answer
2. asked by Erica
3. 1,238 views
for the haber process for the synthesis of ammonia: N2(g)+ 3H2(g)= 2NH3(g), what is ΔG (kJ/mol) at298 K for a reaction mixture
1. 0 answers
2. asked by ramona
3. 1,219 views
In “Civil Peace” Jonathan, the main character has a positive outlook on life despite his situation. Explain what is going on
1. 1 answer
2. asked by Sha'Queshia
3. 1,213 views
if you have a apple juice mix of 5 cups concentrate to 8 cups water, if you only make 1 cup of mix, how much water and how much
1. 1 answer
2. asked by Jack
3. 1,189 views
We do not allow students to be successful imposters of our tutors. You have been banned from posting for this reason. Perhaps in
1. 1 answer
2. asked by Writeacher
3. 1,184 views
a 5.0 kg bowling ball is rolling down the lane at 4.0 m/s. what is the kinetic energy of the bowling ball?
1. 6 answers
2. asked by Brianna
3. 1,179 views
A piece of solid carbon dioxide, with a mass of 6.8 g, is placed in a 4.0-L otherwise empty container at 21°C.
1. 1 answer
2. asked by Felicia
3. 1,175 views
log9 1= _______ (fill in the blank)Let x=log2 1/32 . Write the exponential form of the equation and solve the equation for x.
1. 2 answers
2. asked by math help
3. 1,173 views
The final rankings of the top 20 NCAA college basketball teams are an example of which level of measurement?
1. 3 answers
2. asked by Anonymous
3. 1,160 views
I just finished an organic chemistry lab experiment on separating and analyzing an unknown acid/neutral compound mixture using
1. 1 answer
2. asked by Kate
3. 1,158 views
Consider the following chemical equation.H2(g) + I2(g) → HI(g) Assuming all gases are at the same temperature and pressure,
1. 0 answers
2. asked by Kalen
3. 1,147 views
hey its me again...i think i need to reword my issue. i am having trouble clearing up my thesis. I feel like i have the idea but
1. 2 answers
2. asked by Kyle
3. 1,145 views
if the employee is fulltime at $9.50hr (plus 20% for benefits) and works one hour of overtime at 1.5 salary, what would the cost
1. 3 answers
2. asked by Rey
3. 1,141 views
6. Necesito una chaqueta y sólo tengo diez dólares. Voy _________.a. al almacén que tiene ropa cara b. a la zapatería con
1. 1 answer
2. asked by mysterychicken
3. 1,128 views
A 120. mL sample of a gas is at a pressure of 1.50 atm. If the temperature remains constant,what will be its volume at 3.50 atm
1. 1 answer
2. asked by Ivy
3. 1,127 views
A 21.18 mL of 0.250 M NaOH is titrated with a H2SO4 solution. The initialvolume of H2SO4 was 13.28 and the final volume of H2SO4
1. 2 answers
2. asked by Ivy
3. 1,123 views
A 0.50 kg ball that is tied to the end of a 1.4 m light cord is revolved in a horizontal plane with the cord making a 30° angle
1. 2 answers
2. asked by kaitlyn
3. 1,122 views
Resonance of sound waves can be produced within an aluminum rod by holding the rod at its midpoint and stroking it with an
1. 1 answer
2. asked by Erica--help!
3. 1,122 views
find each sum 65+18 How can you regroup ones in this sum?
1. 1 answer
2. asked by esha
3. 1,115 views
Which statement is not true?Two or angles that are supplementary have a sum of 180 or Two angles that are complementary have a
1. 5 answers
2. asked by Please Help!
3. 1,098 views
True or False, In simple linear regression analysis, if the error terms exhibit a positive or negative autocorrelation over
1. 0 answers
2. asked by Zack
3. 1,096 views
A weightlifter performing a curl with a 320 N barbell stops the lifting motion with his forearmsin a horizontal position. (a) If
1. 0 answers
2. asked by jim
3. 1,078 views
An oil droplet with a mass of 3.50 x 10^-15 kg accelerates downward at a rate of 2.50 m/s2 when it is between two horizontal
1. 2 answers
2. asked by Marium
3. 1,065 views
Assume the optimal coffee drinking temperature is 75°C, and further assume coffee has the same heat capacity and density as
1. 3 answers
2. asked by Steve
3. 1,064 views
Someone please help me not sure if I even know what I am doing with any of this.write the following ratios in simplest form 5
1. 2 answers
2. asked by TANGIE
3. 1,064 views
Can you tell me if all my verbs are correct?Not one of the ushers knows where the lounge is. Mumps is a common childhood disease
1. 1 answer
2. asked by Sam
3. 1,044 views
15.34 In a four-digit lottery, each of the four digits is supposed to have the same probability of occurrence.The table shows
1. 1 answer
2. asked by Anonymous
3. 1,040 views
What are the concentrations in mass of the following solutions:a) a 200mL aqueous solution containing 4.26g sodium solfate. b) a
1. 1 answer
2. asked by Tarkan
3. 1,029 views
An airplane traveling a constant 100.0 m/s is to drop supplies to flood victims isolated on a patch of land 200.0 m below. A)
1. 1 answer
2. asked by Catherine
3. 1,026 views
Calculate the freezing point of each of the solution 75.0 of glucose,C6H12O6 , added to 9.30×10−2 of water.... Please help
1. 1 answer
2. asked by Garrett
3. 1,024 views
A train is heading due west from St. Louis. At noon, a plane flying horizontally due north at a fixed altitude of 4 miles passes
1. 0 answers
2. asked by Joshua
3. 1,016 views
If you from Iran,what do you like and don't like about america? Also why you decided to come to america?
1. 2 answers
2. asked by john
3. 1,008 views
A full can of black cherry soda has a mass of 0.406 kg. It contains 3.38 m3 of liquid. Assuming that the soda has the same
1. 2 answers
2. asked by joe
3. 1,006 views
1) 27x^3+82) 3x^2-x-4
1. 2 answers
2. asked by mike
3. 1,000 views
if you combust 30kg of octane (about the amount in one tank for a small car), how many kilograms of CO2 will you emit?
1. 1 answer
2. asked by emily
3. 991 views
A disk, with a radius of 0.25 m, is to be rotated like a merry-go-round through 800 rad, starting from rest, gaining angular
1. 1 answer
2. asked by Meghan
3. 978 views
Express the sum below using summation notation. Use 1 as the lower limits of summation and i for the index of summation.1/3+2/4+
1. 0 answers
2. asked by Roger
3. 936 views
suppose that you have 800ft of fencing. you are to construct a rectangular corral which is divided into two pieces. what are the
1. 1 answer
2. asked by tanika
3. 936 views
The value of ΔG°f at 25°C for gaseous mercury is 31.85 KJ/mol. What is the vapor pressure of mercury at 25°C? [Hint:
1. 0 answers
2. asked by alice
3. 932 views
I am having a hard time starting my paper on Life of Pi by Yann Martel. My thesis is: If Richard Parker is Pi Patel then Pi is
1. 2 answers
2. asked by Kyle
3. 932 views
where does horizontal sliding take place on the earth?
1. 2 answers
2. asked by hunter
3. 930 views
Given 400.0 g of hot tea at 80.0C, what mass of ice at 0C must bea added to obtain iced tea at 10.0C? The specific heat of water
1. 0 answers
2. asked by Ashley
3. 929 views
You need 50 pounds of two commodities costing $1.25 and$1.60 per pound.a) Verify that the total cost is y=1.25x + 1.60(50 - x),
1. 1 answer
2. asked by Erica
3. 924 views
write an application in response to an advertisement in the daily dawn for the post of manager hrm in sony electric lahore
1. 1 answer
2. asked by ali
3. 912 views
Evaluate all six trigonometric functions at t, where the given point lies on the terminal side of an angle of t radians in
1. 3 answers
2. asked by Josh
3. 903 views
Four circles with centers A,B,C,and D are mutually tangent. The areas of circles A,B,C, and D are 25pi, 100pi, 16pi, and 225pi
1. 3 answers
2. asked by Tyler
3. 903 views
What is the formula for the compound formed when potassium reacts with nitrogen?
1. 4 answers
2. asked by bob
3. 889 views
Hello, I just have a quick question that I would like to have clarified.According to my textbook definition, NaBH4 (a reducing
1. 2 answers
2. asked by Toki
3. 884 views
What is the molarity of ZnCl2 that forms when 30.0g of zinc completely reacts with CuCl2 according to the following reaction?
1. 0 answers
2. asked by jenni
3. 876 views
The mean serum cholesterol level in the population of males who do not develop heart disease is known to be 219 mg/100 ml.
1. 3 answers
2. asked by Mack
3. 871 views
Each capital letter of the alphabet is carefully printed on a piece of paper in block-form and placed in a bowlABCDEFGHIJKLMNOPQ
1. 6 answers
2. asked by Rena
3. 866 views
How much 2.5mM solution of NaCl can be made from 30g of this pure salt?
1. 1 answer
2. asked by margrav2
3. 856 views
Plan a straight line ESA lesson for a language level of your choice, to cover vocabulary connected with the topic of food:
1. 3 answers
2. asked by rahila
3. 853 views
Determine whether the sequence is arithmetic. If so, find the common difference. (Assume that n begins with 1.)a n=2(1/5)n
1. 0 answers
2. asked by yea nah
3. 844 views
what volume of 2.50 M HCl in liters is needed to react completly(with noting left over) with .750 L of 0.500MNacCO3
1. 1 answer
2. asked by Garrett
3. 844 views
As one descends group 6A of the periodic table, the number of valence electronsfound in each element? A. Increases B. Decreases
1. 0 answers
2. asked by Ivy
3. 841 views
If a large housefly 3 m away from you makes a noise of 43 dB, what is the noise level of 1200 flies at that distance, assuming
1. 1 answer
2. asked by HelpPlease
3. 840 views

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