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Questions Asked on March 23, 2013

A ship maneuvers to within 2500 m of an island's 1800 m high mountain peak and fires a projectile at an enemy ship 610 m on the
1. 2 answers
2. asked by Nicola
3. 4,827 views
Consider a solution made by mixing 500.0 mL of 0.04182 M Na2HAsO4 with 500.0 mL of 0.03645 M NaOH. Complete the mass balance
1. 1 answer
2. asked by Jackie
3. 4,377 views
A solution contains 25 mmol of H3PO4 and 10. mmol of NaH2PO4. What volume of 2.0 M NaOH must be added to reach the second
1. 2 answers
2. asked by Holly
3. 3,146 views
3. Which oxidation-reduction reactions are best balanced by the half-reaction method?A.) covalent reactions *B.)acid-base
1. 5 answers
2. asked by Anonymous
3. 3,122 views
Consider the titration of 100.0 mL of 0.100 M H2NNH2 (Kb = 3.0 10-6) by 0.200 M HNO3. Calculate the pH of the resulting solution
1. 3 answers
2. asked by Jeff
3. 2,755 views
The amount of energy released by burning a fuel source, measured in energy per mass, is called the fuel value. If all the energy
1. 2 answers
2. asked by Lara
3. 2,427 views
Three times the square of a number minus twice the same number is 8. Find all such numbers.
1. 3 answers
2. asked by Haelin
3. 2,402 views
If sin A = 3/5 and cos B = 24/25 and <A and <B are both in quadrant 1, what is the exact value of cos (A-B) ? Help please
1. 2 answers
2. asked by Maryanne
3. 2,312 views
What is the reduction half-reaction for the following unbalanced redox equation?Cr2O7^2– + NH4^+ Cr2O3 + N2 A.Cr2O3-->
1. 11 answers
2. asked by cassie
3. 2,130 views
Calculate amount (in grams) of unknown acid used for titration. You want 30 mL of titrant to get the equivalence point. Assume
1. 1 answer
2. asked by Justine
3. 2,112 views
A car rental agency currently has 41 cars available, 28 of which have a GPS navigation system. Two cars are selected at random
1. 1 answer
2. asked by Anonymous
3. 1,946 views
The measures of two consecutive angles of a parallelogram are in the Ratio 3:7. Find the measure of an acute angle of the
1. 1 answer
2. asked by Kay
3. 1,900 views
If the half-life of a radionuclide is 1 month, is a sample of it completely decayed after 2 months?
1. 2 answers
2. asked by Dee
3. 1,884 views
1LB of ice at 20 deg f exerts its force downward. after the ice has absorbed 200 BTU's what direction will the force be exerted?
1. 4 answers
2. asked by Gilbert
3. 1,774 views
Case DiscussionDr. Pearson has recently been hired into the Central City Internal Medicine Group as its fifth physician. He has
1. 5 answers
2. asked by Iuliana Pop
3. 1,725 views
What coefficient of H+ balances the atoms in the following half-reaction?H^+ + MnO2 Mn^2+ + H2O A.1 B.2 C.3 D.4 I think this is
1. 3 answers
2. asked by cassie
3. 1,626 views
Calculate the pH at the equivalence point in titrating 0.100 M solutions of each of the following with 0.080 M NaOH.chlorous
1. 2 answers
2. asked by hannah
3. 1,609 views
what is the pH of a solution prepared by adding 0.259g of ammonium chloride to 115mL of water? Kb of NH3 is 1.8x10^-5
1. 1 answer
2. asked by Jill
3. 1,583 views
An object that is falling or vertically projected into the air has it height, in feet, above the ground given by the formula
1. 1 answer
2. asked by pam
3. 1,450 views
A hollow copper wire with an inner diameter of 0.60mm and an outer diameter of 1.8mm carries a current of 15A. What is the
1. 0 answers
2. asked by Wolf
3. 1,424 views
CAN YOU HELP ME MS.SUE JUST GIVE ME THE ANSWER PLEASE I TRY AND TRY AND TRY AND STILL I CAN'T DO IT PLEASE I NEED HELP PLEASE
1. 5 answers
2. asked by Dianna
3. 1,379 views
Uncle Ritchie has some $10 bills in his wallet. He shares all of them equally among his 4 nieces and nephews. Each of the nieces
1. 1 answer
2. asked by Cherie
3. 1,331 views
Two fixed charges 1.07mC and -3.28mC are 61.8 cm apart. Where the third charge may be placed so that no net force acts on it
1. 1 answer
2. asked by hamid
3. 1,306 views
I'm having trouble on the 2nd part of the question below.The value of a 1962 Mickey Mantle baseball card went from $900 to $700.
1. 0 answers
2. asked by Brandi
3. 1,289 views
A coin is placed at a focal point of a converging lens. Is an image formed? If yes, is it real or virtual , erect or inverted,
1. 1 answer
2. asked by Susan
3. 1,285 views
a machine weighing 1500N is supported bt two chains attached to some point on the machine.one of these ropes goes to the eye
1. 1 answer
2. asked by wilson
3. 1,277 views
A ship maneuvers to within 2500 m of an island's 1800 m high mountain peak and fires a projectile at an enemy ship 610 m on the
1. 1 answer
2. asked by Nicola
3. 1,276 views
During a spontaneous chemical reaction, it is found that δSsys < 0. This means __________a. δSsurr < 0 and its magnitude is <
1. 1 answer
2. asked by Flavia
3. 1,209 views
23.What is the approximate circumference of a circle with a radius of 6 centimeters?A.12 B.18 C.24 D.36 D 24.What is the length
1. 1 answer
2. asked by Jerald
3. 1,196 views
If G is a group of order 12, the G must have a subgroup of all of the following orders EXCEPTChoose one answer. a. 0 b. 12 c. 2
1. 1 answer
2. asked by black_widow
3. 1,170 views
16.Eliot spent 24 minutes solving 8 math problems.At that rate, how many math problems can he solve in 54 minutes?a.12 B.16 C.18
1. 1 answer
2. asked by Jerald
3. 1,124 views
what is the exact verb of swam
1. 3 answers
2. asked by emily
3. 1,116 views
a positive test charge of 3.0uC experiences a force of 0.75 N in an electric field. What is the magnitude of the electric field
1. 1 answer
2. asked by alex
3. 1,107 views
A rectangular box with no top is to be constructed from a 10 in. x 10 in square piece of cardboard by cutting equal square of
1. 1 answer
2. asked by k
3. 1,088 views
The steel I-beam in the drawing has a weight of 9.03 × 103 N and is being lifted at a constant velocity. What is the tension in
1. 0 answers
2. asked by Christina
3. 1,059 views
Let the bottom edge of a rectangular mirror on a vertical wall be parallel to and h feet above the level floor. If a person with
1. 1 answer
2. asked by black_widow
3. 1,056 views
how many grams of Ag2CO3 will precipitate when excess Na2CO3 solution is added to 64.0 mL of 0.554 M AgNO3 solution?
1. 1 answer
2. asked by mya
3. 1,055 views
A car of mass m traveling at speed v on a horizontal road applies its brakes and comes to rest in time t while traveling a
1. 1 answer
2. asked by wyatt
3. 1,054 views
Factor each expression3n squared - 3
1. 1 answer
2. asked by ki
3. 1,041 views
How do I find reliable sites for a research project, when I can't use journal articles published online, or personal websites?
1. 2 answers
2. asked by Anna
3. 1,030 views
Suppose that 2.3 L of gas at 35°C and 1.0 atm is expanded to 4.5 L at 42°C. What will the final pressure of the gas be?(Ti in
1. 3 answers
2. asked by Pam
3. 1,005 views
A chemist dissolves 0.095 g of CuSO4 · 5H2Oin water and dilutes the solution to the mark in a 500-mL volumetric flask. A
1. 1 answer
2. asked by Neftali
3. 947 views
1)The sum of 6 terms of an arithmetic series is 45, the sum of 12 terms is -8. Find the first term and the common difference?2)I
1. 3 answers
2. asked by Estrick Abel
3. 924 views
At the surface of a freshwater lake the pressure is 102 kPa.(a) What is the pressure increase in going 34.7 m below the surface?
1. 0 answers
2. asked by ray
3. 919 views
A quantity of water at 87 degrees C is cooled at a rate of 2844 MJ/h. After 40 minutes, the water has changed to ice, having a
1. 1 answer
2. asked by Dylan
3. 910 views
Lighting strike: Storm clouds build up large negative charges that dwell in a charge center. Suppose a storm cloud has -25 C in
1. 0 answers
2. asked by Cassie
3. 902 views
A cart of mass M1 = 5.00 kg and initial speed = 3.00 m/s collides head on with a second cart of mass M2 = 3.00 kg at rest.
1. 0 answers
2. asked by Erin
3. 880 views
if the LCM of first 20 natural numbers is X, then what will be the LCM of first 25 natral numbers
1. 2 answers
2. asked by Meenakshi
3. 869 views
What physical quantities are governed by the quantum numbers of an atomic electron?.
1. 1 answer
2. asked by Dee
3. 848 views
The solubility of AgCl(s) in water at 25 C is 1.33x10^-5 M and its delta H of solution is 65.7 kJ/mol .What is its solubility at
1. 0 answers
2. asked by vanessa
3. 847 views
from a rectangular piece of metal sheet of length and breadth 1.60 m and 80 cm respectively, 3 circular sheets of 20 cm radius
1. 1 answer
2. asked by parth
3. 845 views
What molar ratio of acetic acid to sodium acetate is required to create a buffer solution having a pH of 4.83 at 25 Celsius? Ka
1. 1 answer
2. asked by Viv
3. 845 views
Solve equation.-5(s-7) = 15
1. 1 answer
2. asked by Cherie
3. 835 views
A small block with mass 0.035 kg slides in a vertical circle of radius 0.425 m on the inside of a circular track. During one of
1. 0 answers
2. asked by Hannah
3. 823 views
Calculate the pH of a solution that is 2.00M HF, 1.00M NaOH, and 0.393M NaG (Ka=7.2 x10^-4).The answer I got was 4.76 ..
1. 3 answers
2. asked by Jill
3. 820 views
1.What is the greatest common factor of 28 and 35?A.4 B.7 C.9 D.14 B? 2.Dina has a savings account with $276.38 in it. Her older
1. 3 answers
2. asked by Jerald
3. 820 views
Two kg of water at a temperature of 50 degrees C have 485.3 kJ of heat transferred from them, resulting in a mixture of
1. 0 answers
2. asked by Dylan
3. 810 views
Calculate the molarity of the nitrate ion in a 0.111 M solution of calcium nitrate?so would I have to find the number of moles
1. 4 answers
2. asked by Amber
3. 796 views
NYS ELA 7 Score - Level 2 (high two so I was seven points away to a three)My Scale Scare - 658 Level Two: 642-664 (scale score)
1. 4 answers
2. asked by Laruen
3. 785 views
if you start with 150g of co-60 and 40 g remain, how much time has passed?co-60 has a half lie of 5 yrs
1. 0 answers
2. asked by Logann
3. 773 views
Find dy/dx.7xy^3 − x^2y = 6
1. 1 answer
2. asked by akash
3. 768 views
A hypodermic syringe is attached to a needle that has an internal radius of 0.303 mm and a length of 3.02 cm. The needle is
1. 0 answers
2. asked by ray
3. 766 views
time day 0 day 1 day 3 day 4 day 5 day 7count blank 7 10 5 14 9 8 low 45&49 64&70 62&69 75&79 80&82 68&72 high 45&49 72&78
1. 0 answers
2. asked by nadye
3. 762 views
Help pleaseSimplify the expression. √3(5-√3) + 6√3 a) 10√3 b) 11√3 - 3 c) 5√3 + 15 d) 6√3 + 5
1. 2 answers
2. asked by Anonymous
3. 758 views
A birthday candle 4 cm high is 10 cm from a converging lens whose focal length is 15cm. Use a ray diagram on a suitable
1. 0 answers
2. asked by Susan
3. 755 views
Which of the resolutions at Seneca Falls Convention was most inspired by women’s inability to own property? (1 point)
1. 4 answers
2. asked by social studies
3. 746 views
Find the area of a circular segment of a circle of radius 7cm that sub tends a central angle of 35 degrees?
1. 2 answers
2. asked by Anna
3. 739 views
What is the hydronium ion concentration of a buffer solution that is 0.10M NaHPO4 and 0.50M NaH2PO4? For H3PO4,Ka1=6.9x10^-3,
1. 3 answers
2. asked by Viv
3. 733 views
Please tell me which Gas Law equation to use to figure out this problem...A helium balloon at 25°C, 1 atm, has a volume of 2.88
1. 2 answers
2. asked by Pam
3. 722 views
True or false history questions. im stuck on two questions?As expressed in the painting by Eugene Delacroix, early 19th century
1. 1 answer
2. asked by Jessica Hamilton
3. 715 views
A gas in a discharge tube consists entirely of ions of the same element, of the same charge. Each ion has only one remaining
1. 3 answers
2. asked by schoolgirl
3. 708 views
A polynomial function p(x) has a relative maximum at (3, -4) a relative minimum at (-1, -6), a relative maximum at (-5, 2) and
1. 0 answers
2. asked by James
3. 706 views
consider the functions f(x)=x^3-2 and g(x)=3 sqrt x+2:a. find f(g(x)) b. find g(f(x)) c. determine whether the functions f and g
1. 2 answers
2. asked by marie
3. 698 views
The reading list for a literature class has 6 fiction and 8 nonfiction books. A student is to write a report on 5 books from the
1. 0 answers
2. asked by Sam
3. 697 views
(a) Consider the gaseous molecule BN-. At home, construct the molecular orbital diagram that is consistent with the known order
1. 6 answers
2. asked by schoolgirl
3. 690 views
a positive test charge of 3.0uC experiences a force of 0.75 N in an electric field. What is the magnitude of the electric field
1. 0 answers
2. asked by alex
3. 659 views
the theoretical probability of winning the lottery is 1/1,000,000,000.which of the ff is true if you purchase a lottery
1. 1 answer
2. asked by francisca
3. 657 views
Which equation describes the relationship between x and y in the table below?x y 5 20 7 28 9 36 11 44 A.y=x+15 B.y=x+8 C.y=3x+5
1. 4 answers
2. asked by Jerald
3. 655 views
Find the slope of the graph of the function at the given point. (If an answer is undefined, enter UNDEFINED.)x^3 + y^3 = 14xy,
1. 1 answer
2. asked by akash
3. 636 views
One jar of peanut butter and 3 loaves of bread cost $6.70. Three jars of peanut butter and 1 loaf of bread cost $9.32. Find the
1. 2 answers
2. asked by Shannon
3. 635 views
A particle wavelength (λp) of a proton is 10-12m.What is the velocity of this proton [m/s]? To achieved the velocity that you
1. 6 answers
2. asked by schoolgirl
3. 625 views
can you help me with my grammar
1. 3 answers
2. asked by Anonymous
3. 608 views
Magnesium can be produced by reaction of magnesium oxide (MgO) with silicon (Si). The by-product of the reaction is magnesium
1. 1 answer
2. asked by schoolgirl
3. 605 views
(b) (4 pts.) Suppose it is a hot summer day (40.0 degrees C = 104.0 degrees F), and you have left a can of hairspray outside so
1. 2 answers
2. asked by Anonymous
3. 596 views
A leaf frozen into a pond in winter is 40mm below the surface of the ice. How far does the leaf seem to be ?(n=1.31)
1. 0 answers
2. asked by Susan
3. 591 views
Calculate the atomic weight of an element (X) given the following information:26X: 26.000 amu at 0.1102 fractional abundance
1. 3 answers
2. asked by schoolgirl
3. 591 views
Mark is a 30yo businessman who was diagnosed with Crohn’s dz over ten years ago; otherwise, he’s a healthy guy. He’s been
1. 1 answer
2. asked by Anonymous
3. 583 views
How many feet will it take a car traveling at 120 mph to stop?
1. 1 answer
2. asked by val
3. 583 views
7.Figure out the expression bellow(7+3)x2-5 A.8 B.15 C.22 D.30 B 8.When Henry went to the pet store he noticed that there were
1. 3 answers
2. asked by Jerald
3. 573 views
if you want a solution that is .1m in ions what mass of na2so4 must you dissolve in125 grams of water assume total dissolution
1. 2 answers
2. asked by rich
3. 572 views
An electron of wavelength 1.74*10-10m strikes an atom of ionized helium (He+). What is the wavelength (m) of the light
1. 9 answers
2. asked by Maikol
3. 570 views
the nile river is the worlds longest river .let n sttand for the length in miles of the nile. th parana river is 3,030 miles
1. 1 answer
2. asked by taffy
3. 565 views
Identify and describe 3 environmental health hazards that cause ill health,accidents,crises and disasters within communities in
1. 2 answers
2. asked by Kananelo
3. 558 views
Assuming complete dissociation, what is the pH of a 2.55 mg/L Ba(OH)2 solution?
1. 1 answer
2. asked by Joe
3. 556 views
A class of 23 students was using square tiles to build rectangular shapes. Each student has more than one tile and each has a
1. 2 answers
2. asked by Enis
3. 554 views
x squared - 9factor
1. 1 answer
2. asked by ki
3. 554 views
Consider an electron in the ground state of hydrogen.(a)What is the least amount of energy needed to excite the ground state
1. 2 answers
2. asked by schoolgirl
3. 550 views
A ball is fired from the ground with an initial speed of 1.36 103 m/s (approximately four times the speed of sound) at an
1. 2 answers
2. asked by Nicola
3. 548 views
Calculate the enthalpy of atomization per unit volume for Rb. Express your answer in kJ/m3.Determine the volume (in mL) occupied
1. 5 answers
2. asked by schoolgirl
3. 542 views
Tantalum metal is produced by reaction of potassium heptafluorotantalate (K2TaF7) with elemental sodium (Na) in a reactor heated
1. 5 answers
2. asked by schoolgirl
3. 542 views

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