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Questions Asked on February 19, 2013

A solution of H2SO4(aq) with a molal concentration of 8.01 m has a density of 1.354 g/mL. What is the molar concentration of
1. 5 answers
2. asked by Jhanvi
3. 13,313 views
how to write an Acrostic poem where subject matter is YERTLE
1. 2 answers
2. asked by nini
3. 639 views
How long does it take to fully charge a 5µF capacitor in series witha 5 Mega Ohm resistor
1. 2 answers
2. asked by Matt, AGAIN
3. 3,504 views
3x^8 – 7x^8A.-4x^16 B.–21x^8 C.–4x^8 D.10x^8 I think this is C...just making sure you don't add the exponents...?
1. 4 answers
2. asked by Cassie
3. 1,609 views
Can someone check my answers on exploring conic sections?1. Graph x2 + y2 = 9. What are its lines of symmetry? Every line
1. 54 answers
2. asked by Lee
3. 26,161 views
A battery delivering a current of 55.0 A to a circuit has a terminal voltage of 21.8 V. The electric power being dissipated by
1. 1 answer
2. asked by Anonymous
3. 858 views
A circle with radius 3 is inscribed in a isosceles trapezoid with legs of 10. Find the length of the smaller base.When I draw a
1. 2 answers
2. asked by Knights
3. 698 views
if you invest $25,000 in an account that gets 12% annual interest compounded quarterly, how much would you have in 10 years?
1. 2 answers
2. asked by james
3. 582 views
If you invested a penny on Jan 1,1776 at 10% interest compounded daily, how much would you have on jan 1 2011?
1. 2 answers
2. asked by james
3. 2,206 views
how may 9-inch-square floor tiles are needed to cover a rectangular floor that measure 12 feet by 15 feet
1. 2 answers
2. asked by arlinda
3. 2,135 views
At 25 degrees C and 1 atm gas pressure, the solubility of CO2(g) is 149 mg/100 g water. When air at 25 degrees C and 1 atm is in
1. 1 answer
2. asked by Jacqueline
3. 1,598 views
Hi! Can someone please balance these equations, please?! I'm having major trouble! Thank you!HCl (aq) + NaHCO3 (aq) �¨ HBr
1. 1 answer
2. asked by Hallie
3. 875 views
How many milligrams of a mixture containing equal numbers of moles of CH and N2 at 10.0 atm total pressure will dissolve in 1.00
1. 1 answer
2. asked by Jacqueline
3. 433 views
How many milliliters of pure acid must be added to 150 milliliters of a 70% solution of acid to obtain a 80% solution?
1. 1 answer
2. asked by Anonymous
3. 844 views
How many gallons of a 13%-salt solution must be mixed with 6 gallons of a 22%-salt solution to obtain a 16%-salt solution?
1. 1 answer
2. asked by Anonymous
3. 373 views
The vapor pressure of benzene (C6H6) at 25 degrees C is 95.1 mm Hg. What is the vapor pressure of benzene above a solution in
1. 1 answer
2. asked by Jacqueline
3. 877 views
How long will it take P dollars to triple itself at 14% simple interest?
1. 1 answer
2. asked by Anonymous
3. 387 views
How long will it take $600 to double itself at 12% simple interest?
1. 3 answers
2. asked by Anonymous
3. 548 views
find the derivative.f(á)=ln(siná)
1. 1 answer
2. asked by Mike
3. 282 views
Finding domainf(x)=1/x^2-5 Can't remember how to solve, your help is appreciated:-)
1. 1 answer
2. asked by Anonymous
3. 321 views
Determine the voltage across the 5.0-Ù resistor in the drawing.
1. 1 answer
2. asked by Anonymous
3. 452 views
Your boss expects you to stay late to cover the workload of a coworker who is out sick,but you are supposed to help your mother
1. 1 answer
2. asked by Sabrina
3. 705 views
Chris deposited $1,500 in a bank account for 2 years. The account earned $120.00 in simple interest. What simple interest rate
1. 1 answer
2. asked by Ryan
3. 517 views
Help!!!!!!!!!!!!Fe + CuSO4 --> Cu + FeSO4 2.05g 7.00g 2.46g 151.8g Which reactant was limiting and how does this chemical
1. 2 answers
2. asked by Megan
3. 676 views
While rummaging, Bernard found a figurine that he believed to be made out of silver. To test his guess, he looked up the density
1. 2 answers
2. asked by Barb
3. 522 views
Why wouldn't you do this reaction directly in a lab (and would rather use Hess' Law to determine the enthalpy of formation)?:1/2
1. 1 answer
2. asked by a Canadian
3. 1,335 views
The following is a cost function for clinic visits in a small inner city clinic:a.Determine the marginal cost for each level of
1. 0 answers
2. asked by Renee
3. 443 views
a 31 year old female contracted HIV human immunodeficiency syndrome) Ordinarily harmless infections are deadly to her. Which
1. 0 answers
2. asked by Sabrina
3. 464 views
Can a line segment have two midpoints?
1. 1 answer
2. asked by Anonymous
3. 526 views
Write the equation of the circle in standard form. Find the center, radius, intercepts, and graph the circle.x^2+y^2+16x-18y+145
1. 1 answer
2. asked by Amanda
3. 528 views
the energy that can extracted from a storage battery is always less than the energy that goes into it while it is being charged.
1. 1 answer
2. asked by jane
3. 940 views
A wooden railing is 82 feet long. It is to be divided into 4 pieces. Three pieces will be the same length, and the fourth piece
1. 1 answer
2. asked by Ruth
3. 541 views
If you want to make 75 mL of a 0.015 M solution of B(OH)3 in water, how many grams of B(OH)3 would you need?
1. 1 answer
2. asked by Margaret
3. 321 views
if the circumference of a circle is 12.56 m then what is its diameter?
1. 2 answers
2. asked by Anonymous
3. 1,044 views
A 4.19-F and a 7.46-F capacitor are connected in series across a 35.0-V battery. A 8.46-F capacitor is then connected in
1. 1 answer
2. asked by Anonymous
3. 827 views
Which answer below includes all the phases of respiration?A.Beathing,pulmonary ventilation,gas transport, and cellular
1. 1 answer
2. asked by Sabrina
3. 545 views
2k+7=5k-k
1. 1 answer
2. asked by Tony
3. 467 views
Hi! I am doing this chemistry lab of solubility curve of a solid investigation and this is for KCl.The purpose of this lab is to
1. 1 answer
2. asked by Lori
3. 855 views
Which figures will always be similar to each other? two rectangles, two trapezoids, two equilateral triangles, or two hexagons.
1. 20 answers
2. asked by Bell
3. 4,551 views
8x^3+4x^2-4x solution sets
1. 2 answers
2. asked by jackie
3. 337 views
Tierra,nico, and alex had 856.00 together. Tierra spent 2/5 of her money,nico spent 40.00, and alex spent twice as much as
1. 1 answer
2. asked by brieanna
3. 588 views
In a certain compound of copper and oxygen, a sample weighing 0.5424g contains 0.4831 g of Cu. How many moles of Cu in the
1. 1 answer
2. asked by Jester21
3. 798 views
In a certain compound of copper and oxygen, a sample weighing 0.5424g contains 0.4831 g of Cu. How many moles of Cu in the
1. 1 answer
2. asked by Jester21
3. 1,772 views
Hi! I am doing this chemistry lab of solubility curve of a solid investigation and this is for KCl.The purpose of this lab is to
1. 0 answers
2. asked by Lori
3. 1,234 views
Solving for a variable4x^2+3y=y+1/3 I'm stuck thanks
1. 2 answers
2. asked by Anonymous
3. 355 views
African Amrican used both petitions and demonstrations to fight for the cilvl rights?
1. 1 answer
2. asked by Katherine
3. 384 views
How many grams of magnesium sulfate would you need to make 0.500 L of a 10.0% M/V solution in water? Please show work.
1. 1 answer
2. asked by Margaret
3. 472 views
how are they different?
1. 1 answer
2. asked by Katherine
3. 268 views
14=2/3(9y-15)
1. 1 answer
2. asked by katie
3. 292 views
What do Eugene V. Debs, Jeannette Rankin, and Randolph Bourne all have in common?Is it that they were all against American entry
1. 1 answer
2. asked by CeCe
3. 643 views
The average weekly earnings in dollars are listed below. What value corresponds to the 40th percentile?804 736 659 489 777 623
1. 1 answer
2. asked by roga
3. 459 views
what are the solution sets to x^5-2x^3+x=0 and how do you get them?
1. 2 answers
2. asked by jessica
3. 329 views
sing the proper average, find the average number of grams of fat per ounce of meat or fish that a person would consume over a
1. 1 answer
2. asked by roga
3. 2,237 views
The javelin event is held on the field inside the track. This field is a rectangle measuring 100 meters by 64 meters, with a
1. 1 answer
2. asked by Diana
3. 538 views
Solve the equation:a right pyramid with vertical height stand on rectangular base widith that measures 20cm by 14cm the hieght
1. 0 answers
2. asked by Thomas
3. 1,079 views
On page 111 of your reading material there is a problem that requires you to calculate the average speed for a daylong bus trip.
1. 5 answers
2. asked by Anonymous
3. 800 views
African amirican used both petitions and demonstrations to fight for cilvil rights?
1. 1 answer
2. asked by Katherine
3. 356 views
A light, rigid rod with two masses attached to its ends, one of mass 3M and one of mass M, is pivoted about a horizontal axis.
1. 0 answers
2. asked by Anonymous
3. 1,660 views
an iron calorimeter has a heat capacity of 68.85 kJ/oC. what is its mass
1. 0 answers
2. asked by PurpleDinosaur54
3. 493 views
How are petitions and Demonstrations similar?
1. 5 answers
2. asked by Katherine
3. 545 views
Determine the amount of the ordinary annuities at the end of the given periods.$200 deposited monthly at 1% per month for 20
1. 2 answers
2. asked by Matt
3. 538 views
How do I work this problem: 4/5 X 10=
1. 1 answer
2. asked by GOOBER
3. 291 views
The amount (future value) of an ordinary annuity is given. Find the periodic payments.A = $2500, and the annuity earns 6.5%
1. 4 answers
2. asked by Matt
3. 601 views
what is the greatest possiable error for 28000?
1. 0 answers
2. asked by nay
3. 310 views
Rearrange this expression into quadratic form, ax2 bx c = 00.20= ((x^2)/(55-x)) where a = 1, and identify the values of b and c.
1. 2 answers
2. asked by Robin
3. 2,547 views
A customer uses a $20 bill at a self check-out register to pay for products totaling $14.50. The customer is concerned they did
1. 1 answer
2. asked by Courtnie
3. 383 views
Do Psychologist adhere to the same code of ethics as a social worker? What is the number 1 ethical concern of a psychologist?
1. 1 answer
2. asked by Ronnie
3. 781 views
if 45 g of calcium carbide reacts with 23 g of water, how many liters of acetylene can be produced, assuming the reaction goes
1. 1 answer
2. asked by Anonymous
3. 433 views
Were there any common themes between the elctions of 1916, 1920, and 1928?
1. 1 answer
2. asked by CeCe
3. 424 views
Write the equation of a line perpendicular to the given line but passing through the given point.y=x+4 (-7,1)
1. 1 answer
2. asked by TED
3. 418 views
The Lewis dot structure of ammonia, NH3, reveals that it has one lone pair of electrons and three bonds (each to a hydrogen)
1. 1 answer
2. asked by luck
3. 1,419 views
1. Electronegativity differences give us a sense of a bond's polarity. Which of the following bonds would you expect to be most
1. 1 answer
2. asked by luck
3. 476 views
How many valence shell electrons would you expect for an S2- ion?8 Am I correct.
1. 1 answer
2. asked by luck
3. 431 views
a manager bought some stamps. she gave 1/3 of them to a cashier and 1/5 of them to her secretary. if the secretary received 40
1. 2 answers
2. asked by brandi
3. 1,107 views
zoe, minh, and jake sold some tickets for a school fundraiser. each ticket cost $2. zoe sold 1/2 of the tickets. minh and jake
1. 2 answers
2. asked by brandi
3. 769 views
Rationalize the Denominator of the expression.5/�ãdh
1. 0 answers
2. asked by Please Help!!!
3. 583 views
Which of the following is an accurate description of Simpson's paradox?When groups of data are aggregated, an association can
1. 2 answers
2. asked by Anonymous
3. 924 views
This question id from IB exam,please help!1)Which compound has the highest lattice enthalpy? A. CaO B. CaS C. LiF D. LiI Explain
1. 3 answers
2. asked by chirikamo
3. 2,696 views
calculate the derivative(2,5) (2.1,5.3) h'(2) if h(x)=(f(x))^3 k'(2) if k(x)=f(x))^-1 g'(5) if g(x)=f^-1(x)
1. 0 answers
2. asked by Jake
3. 317 views
I need to write a balance equation of the decomposition of aluminum carbonate.I know the starting "reactant" is Al2(CO3)3 but
1. 1 answer
2. asked by Shadow
3. 2,641 views
A solution prepared by dissolving 3.00 grams of ascorbic acid (vitamin C, C6H8O6), in50.0 grams of acetic acid has a freezing
1. 3 answers
2. asked by Ace
3. 967 views
answers to exam for penn foster
1. 1 answer
2. asked by Ivette
3. 1,224 views
two solutions are prepared using the same solutesolution a: 0.27g of the solute disolves in 27.4g of t-butanol solution b: 0.23g
1. 1 answer
2. asked by Robin
3. 2,760 views
A sample of metallic element X, weighing 4.315g, combines with0.4810 L of Cl2 gas (at normal pressure and 20.0C) to form the
1. 1 answer
2. asked by Robert
3. 1,356 views
What is the maximum mass of H2O that can be produced by combining 90.8 g of each reactant
1. 1 answer
2. asked by g
3. 1,030 views
I wrote an introduction for a lab report for the first time, and I was given no samples (my teacher said "feel free to ask your
1. 2 answers
2. asked by a Canadian
3. 458 views
At 25°C, Kp = 2.910−3 for the following reaction.NH4OCONH2(s) 2 NH3(g) + CO2(g) In an experiment carried out at 25°C, a
1. 2 answers
2. asked by Ashley Jimenez
3. 5,462 views
two solutions are prepared using the same solutesolution a: 0.27g of the solute disolves in 27.4g of t-butanol solution b: 0.23g
1. 1 answer
2. asked by Robin
3. 1,338 views
Joe's utility over consumption and leisure is given by c^(1/2)+@l^(1/2), where @ is a positive constant. Find and graph Joe's
1. 0 answers
2. asked by Corey
3. 911 views
The amount (future value) of an ordinary annuity is given. Find the periodic payments.A = $14,500, and the annuity earns 6%
1. 1 answer
2. asked by Matt
3. 582 views
Firstly, is this right?:Exothermic reactions have a negative enthalpy change value because the enthalpy of the reactants are
1. 1 answer
2. asked by a Canadian
3. 648 views
H1P2: DECOMPOSITION OF AMMONIUM NITRATESolid NH4NO3 (ammonium nitrate) decomposes on heating to 400°C, forming N2O gas and
1. 1 answer
2. asked by Anonymous
3. 1,077 views
The amount desired in a sinking fund is given. Find the periodic payments required to obtain the desired amount.A = $75,000, the
1. 1 answer
2. asked by Matt
3. 440 views
What are three dominant rhetorical devices in the essay "Where the World Began" by Margaret Laurence?
1. 2 answers
2. asked by Emily
3. 1,535 views
Templeton Extended Care Facilities, INC. is considering the acquisition of a chain of cemeteries for $370 million. Since the
1. 1 answer
2. asked by Anonymous
3. 453 views
A factory that specializes in the refinement of transition metals such as titanium was on fire. Provide kinetic-based arguments
1. 1 answer
2. asked by ANNA
3. 392 views
I need help with this lab.Write the equation for the decomposition of the hydrate, CuSO4*XH2O. Mass of crucible and hydrate:
1. 1 answer
2. asked by Mary
3. 964 views
CH4(g) + 2O2(g) = CO2(g) + 2H20(g). What volume of O2 is required to react with 2.0 mol CH4 at 50 degrees Celsius and .500 atm?
1. 1 answer
2. asked by Maria
3. 436 views
Two blocks sit on a horizontal surface. They are connected to each other by a massless cord. The block on the left has a mass of
1. 1 answer
2. asked by Patrick
3. 797 views
A card is to be chosen at random from a shuffled deck. Find the probability the card drawn isA. The queen of clubs , given that
1. 1 answer
2. asked by Mac
3. 430 views

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