Questions Asked on
July 26, 2014

Chemistry
A 0.60 g sample consisting of only CaC2O4 & MgC2O4 is heated at 5000C, converting the two salts of CaCO3 and MgCO3 . The sample then weighs 0.465 g. If the sample had been heated to 9000C, where the products are CaO & MgO, what would the mixtures of oxides
asked by Susan 
math
x = t − 2 sin t, y = 1 − 2 cos t, 0 ≤ t ≤ 6π Set up an integral that represents the length of the curve.
asked by Zoey 
Chemistry
A metal M forms the sulphate M2(SO4)3 . A 0.596 gram sample of the sulphate reacts with excess BaCl2 to give 1.220 g BaSO4. What is the atomic weight of M? (Atomic weights : S = 32, Ba = 137.3)
asked by Susan 
Chemistry
Suppose 26.0g of sodium bromide is dissolved in 150mL of a 0.60M aqueous solution of silver nitrate. Calculate the final molarity of bromide anion in the solution. You can assume the volume of the solution doesn't change when the sodium bromide is
asked by Angie 
Chemistry
1 mole of equimolar mixture of ferric oxalate and ferrous oxalate will require xmole of KMnO4 in acidic medium for complete oxidation, x isis: a) 0.5 mole b) 0.9 mole c) 1.2 mole d) 4.5 mole
asked by Susan 
calculus 2
r=1 3Sin theta¸ find the area enclosed by the inner loop
asked by sarah 
College Bio
If two parental organisms of genotype pp and PP were crossed, what percentage of F1 offspring would be homozygous recessive? (Assume simple Mendelian pattern of inheritance and unlinked alleles.)
asked by Jay 
Algebra
A homeowner wants to fence a rectangular garden using 60 ft of fencing. An existing stone wall will be used as one side of the rectangle. Find the dimensions for which the area is a maximum
asked by Willia 
science
Use standard enthalpies of formation to calculate the value of delata H degree for the rxn:NH3(g) + 3F2(g) = NF3(g) + HF(g)
asked by Padlock 
Math
A theater seats 200 people and charges $10 for a ticket. At this price, all the tickets can be sold. A survey indicates that if the ticket price is increased by a peso, the number of tickets sold will decrease by 10. What price will yield the greatest
asked by 123acxcv 
Chemistry
Nitric acid can be produced from NH3 in three steps process: I)4NH3(g) + 5O2(g) → 4NO(g) + 6H2O(g) II)2NO(g) + O2(g) → 2NO2(g) III)3NO2(g) + H2O(l) →2HNO3(aq) + NO(g) % yield of Ist, IInd & IIIrd are respectively 50 % , 60 % & 80 % respectively the
asked by Susan 
earth science
Which of the following is not an example of a mineral crystal shape? A. Pyrite B. Kryptonite C. Quartz D. Calcite i think its A am i right
asked by alex 
Chemistry
Calculate the number of millilitres of NH3(aq) solution (d = 0.986 g/ mL) contain 2.5 % by weight NH3 which will be required to precipitate iron as Fe(OH)3 in a 0.8 g sample that contains 50 % Fe2O3.
asked by Susan 
PHYSICS
A conductor of length 0.5m moves in a uniform magnetic field of flux density 2 wbm^2. at a uniform velocity of 40m/s. Calculate the induced EMF under the following conditions: (1) the conductor moves at right angle to the magnetic field (2) the conductor
asked by Please help me 
Chemistry Help
1. Spectroscopic studies of the reaction of azide ion with the cluster [Ru3(CO)12] in acetone solvent confirmed the occurrence of process (i) under a CO atmosphere. Kinetic measurements of this rapid [Ru3(CO)12]+ N3– →[Ru3(NCO)(CO)11]–+ N2(i)
asked by Jade 
Physics
A butterfly is flying with velocity jˆ i 12 ˆ 10 + m/s and wind is blowing along x axis with velocity u. If butterfly starts motion from A and after some time reaches point B, find the value of u.
asked by Ram 
chemistry
1. What is the binding energy per nucleon? Why is the binding energy per nucleon, rather than per nuclide, used to compare nuclide stability? 2. When a nucleus forms from nucleons, is energy absorbed or released? Why? 3. Many scientists reacted skeptically
asked by Annie 
physics
A butterfly is flying with velocity 10i +12jˆ m/s and wind is blowing along x axis with velocity u. If butterfly starts motion from A and after some time reaches point B, find the value of u. Answer this Question
asked by Ram 
physics
A maass of 0.5kg is attached to one end of the helical spring and produces an extension 2.5cm the mass now set into vertical oscillation of amplitude 10mm the period of oscillation is??....g=10ms2
asked by kingdavidda1st 
math
A total of 800m of fencing material is used to enclose a rectangular field and to divide the field into four partitions by fences parallel to the width of the field. Find the dimensions of the largest are of the field that can be fenced.
asked by dsadsad 
trigonometry
Two pulleys have radii 20cm and 6cm,respectively. The smaller pulley rotates 15 times in 12 seconds. Find the angular speed of each pulley in rad/sec
asked by helpme 
Algebra
HELP! I am not sure how I would even start this problem or solve it. A hyperbola with a horizontal transverse axis contains the point at (4, 3). The equations of the asymptotes are yx=1 and y+x=5 Write an equation for the hyperbola.
asked by Tessa 
Physics  check answers please
I am to fill in the blanks without a word bank, my answers are in brackets. 1. A ____ diffraction pattern is unique because it has a larger central maximum. (single slit) 2. the brightest, clearest diffraction pattern is created with a _____ (barrier)
asked by Liz 
SCIENCE
A conductor of length 0.5m moves in a uniform magnetic field of flux density 2 wbm. at a uniform velocity of 40m/s. Calculate the induced EMF under the following conditions: (1) the conductor moves at right angle to the magnetic field (2) the conductor
asked by BNzeal 
medical billing and coding
a new technology that will change the role of the transcriptionist is
asked by Anonymous 
Biology
A researcher collects highresolution photographs of the Earth taken from outer space at annual intervals for the last decade. This data would be most useful to analyze which of the following? A. Human movement during crises B. Migration patterns of large
asked by J 
Physics
I am to fill in the blanks without a word bank, my answers are in brackets. 1. When light waves reflect from media in which the speed of light is slower, their phase (crest or trough) is ____ 2. The trick to being able to observe interference patterns for
asked by Liz 
PHI 208 w33k 3 quiz
Question 3. 3. Harm may be understood as: (Points : 1) financial, physical, and emotional harm. quantifiable harm. direct but not thirdparty harm. all of the above.
asked by debra 
Chem: xray
Experiment to obtain the Xray diffraction peaks of an unknown metal. Radiation is K_alpha from Cu. Through these diffraction peaks you wanted to determine: (a) whether the cell is SC, BCC, or FCC (b) the (hkl) value of the peaks (c) the lattice parameter
asked by Anonymous 
statistic
Lilly collects data on a sample of 40 high school students to evaluate whether the proportion of female high school students who take advanced math courses in high school varies depending upon whether they have been raised primarily by their father or by
asked by hnin 
math
Select the approximate values of x that are solutions to f(x) = 0, where f(x) = 5x2 + 7x + 4. a.{–0.44, 1.84} b.{5, 7} c.{–1.40, –0.80} d.{–1.25, 1.75} For some reason, I am thinking it is 5,7
asked by need help 
Economics
Of your implicit and explicit costs of attending college, which is more, why?
asked by Jake 
physics
A jumper of mass m=55 kg starts in a crouched position with the jumper's center of mass at a position y1=0 m. Just before the jumper leaves the floor, his or her center of mass is at y2=0.7 m. From another measurement, you have found that the velocity of
asked by Zoey 
stats
The ABC SelfConcept Inventory has a splithalf reliability coefficient of 0.90, and the XYZ SelfConcept Inventory has a SpearmanBrown reliability coefficient of 0.90. If all other factors are equal, which instrument would you choose to use?
asked by Melissa 
trig
two poles of height 25 cm & 20 cm are are parallel to each other with a distance of 12 cm between them. what is the distance between the top of the two poles?
asked by shrenik 
math
Select the approximate values of x that are solutions to f(x) = 0, where f(x) = 9x2 + 9x + 5. (a){–1.80, 1.80} (b){9, 9} (c){–1.00, –0.56} (d){–0.40, 1.40}
asked by help pls 
Math  trig
Determine the general solution of 8 cos^2x  4cosx  1 =0 (8cos^2x  4cosx)/8 =1/8 cos^2x  4cosx=1/8 cos^2x/cosx =1+4cosx/cosx cosx = 5 x = cos^1(5) x = error
asked by Bontle 
accounting
A city is served by two newspapers—the Tribune and the Daily News. Each Sunday reader purchases one of the newspapers at a stand. The following transition matrix contains the probabilities of a customer’s buying a particular newspaper in a week, given
asked by bcky1958 
Life Science
Lesseconomically developed countries will experience higher birth rates than moreeconomically developed countries due to A. decreased availability of sanitary water. B. higher infant mortality rate. C. higher literacy rate of women. D. increased
asked by J 
chemistry
ph of 6.10mL of 1.20M HCl diluted to 0.560L .
asked by estonia 
wavelength
A human's wavelength is similar to the size of: a) a cell b) atom c) nucleus d) proton e) something else and why?
asked by Liz 
chemistry
A silicon ribbon measuring 100 micron thick, 5 mm wide, and 1 m long has 5 volts applied across its long dimension. The resistivity of silicon is 640 ohmm. How much current will flow through the ribbon? Express your answer in Amps
asked by Muanda 
math
the table below shows some values for the function f. if f is a linear function, what is the value of a+b? table: X  f(x) 0  a 1  12 2  b
asked by anonymous 
Spanish use of Imperfect Verbs
Can someone please check if I've used the Imperfect correctly? Thank You :) ¡Ola mis amigos y familias, me llamo Nick y soy en Miravida Soho en Buenos Aires, la ciudad mayor de Argentina! Mis compañeros de viajes y yo pasamos un buen rato hoy. En la
asked by Nick 
calculus 2
find dy/dx and (d^2)y/(d^2)x for x=2sint y=3cost 0
asked by sarah 
chemistry
*This is part of an exam. so please don't give full solution* just trying to bump ahead of a block. The decomposition of NO2 at room temperature exhibits the following variation in concentration with time: The concentration of NO2 is expressed in
asked by 3.091x 
math
A company charges $200 for each leather bag on order of 150 or less. The cost of each bag is reduced by $1 for each order in excess of 150 pieces. How many bags on order would result in maximum revenue? What is the maximum revenue?
asked by dsadsad 
Ethics
For Mill, when calculating the utility of any particular action, we must include the happiness it will produce for A. The family of the individual who will perform the action B. All sentient creatures C. The indivvidual who will perform the action D. All
asked by Pat 
Math 221
How can I explain how I got the answer. I received the help, but no explanation to how the answer was simplified. 1=1(7) +b b = 8 In other words, you need to explain what you did to simplify 1=1(7) + b. This is also true for the perpendicular equation
asked by Karen 
College English
John Winthrop “A Model of Christian Charity" Discuss the manner in which the theories expressed by Winthrop are in some degree evident in American government and culture today. CAN SOMEONE TELL ME IF I ANSWER IT RIGHT? In Prospero's America, Walter W.
asked by Kiara 
math
Mr. Brown sold a jacket for $240, this making a profit of 20% on his cost. Later, he sold another jacket for $240 this time suffering a loss of 20% on his cost. The result of the two sales was A.He gained $40.00 B.He gained $10.00 C.He lost $20.00 D.He
asked by Johnny 
math
If I have a peice of carpet that is 9 ft by 8 ft and the cost is .59 per square ft how much does it cost for the carpet?
asked by nicole 
CHEMISTRY
how to predict that given complex is sp3 dsp2 hybridized
asked by AYESHA 
Math
What is 5/11 minus 7/11
asked by Anabelle 
CHEMISTRY
how to predict that given complex is sp3 dsp2 hybridized because in Mcqs they ask to identify hybridization in given compound
asked by AYESHA 
calculus 2
use the simpsons rule with n=10, arc length y=^3√x, for 1
asked by sarah 
POL 201
Those who attended the Constitutional Convention believed that (Points : 1) England was an evil society. America had made a great mistake in fighting the revolutionary war. British institutions of government were good but they became corrupt. America would
asked by Sara 
calculus 2
Evaluate integral x/(1+x), (x,3,3)
asked by sarah