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A runner is jogging at a steady 1 km/hr.When the runner is 0.88 km from the finish line a bird begins flying from the runner to
1. 1 answer
2. 393 views
At 1:00 p.m. a car, traveling at a constantvelocity of 76 km/h toward the west, is 19 km to the west of our school. How far from
1. 1 answer
2. 225 views
why is soil a living thing?
1. 1 answer
2. 175 views
When the net is folded into the rectangular prism shown beside it, which letters will be on the front and left side of the
1. 4 answers
2. 1,794 views
You purchase a bond with a coupon rate of 6.8 percentand a clean price of $1,073. If the next semiannual coupon payment is due
1. 1 answer
2. 372 views
You purchase a bond with an invoice price of $968. Thebond has a coupon rate of 7.4 percent, and there are four months to the
1. 1 answer
2. 312 views
An athlete is making an appearance and signing autographs at a new sporting goods store. He agrees to give 20% of his profit to
1. 5 answers
2. 405 views
How far does a car going 25 m/s travel in 5s ?
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2. 251 views
When 0.100 L of 1.00 mol L−1 HCl(aq) is mixed with 0.100 L of 1.00 mol L−1 NaOH, the temperature of the solution rises by
1. 3 answers
2. 362 views
If 1.0 mol L−1 NaX(aq) contains 7.4% solute by mass, what is the molar mass of X? Choose the closest answer. Assume the
1. 2 answers
2. 296 views
What is the volume of 3.10 mol F2?Answer in units of L.
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2. 157 views
A .250 kg ice puck starting from rest slides down a .80 m frictionless incline with a uniform acceleration of 6.5 m/s2. How long
1. 2 answers
2. 530 views
1.John went to the local sporting goods store, where he bought a fishing pole for $32.88, a tackle box for $15.95, and some
1. 1 answer
2. 419 views
Hope Landers purchases an air conditioner for $546.58 and a fan for $45.50. If the state tax is 6 percent, the city tax is 1.5
1. 3 answers
2. 570 views
Twice the sum of a number and its reciprocal is same as 33/16? please help po thanks :>
1. 4 answers
2. 1,408 views
What would be the final temperature of thesystem if 28.4 g of lead at 99.5 ◦C is dropped into 14.0 g of water at 8.61 ◦C in
1. 4 answers
2. 645 views
A piece of metal of mass 25 g at 94◦C is placedin a calorimeter containing 57.4 g of water at 24◦C. The final temperature of
1. 2 answers
2. 613 views
Fe2O3(s) + 3 CO(g) −→ 2 Fe(s) + 3 CO2(g)Given: 2 Fe2O3(s) −→ 4 Fe(s) + 3 O2(g) ∆H = 1616.6 kJ/mol CO(g) −→ C(s) +
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2. 1,212 views
Ca(OH)2(s) −→ CaO(s) + H2O(g)Given: Ca(OH)2(s) −→ Ca(s) + O2(g) + H2(g) ∆H = 973.3 kJ/mol 2 Ca(s) + O2(g) −→ 2
1. 2 answers
2. 1,200 views
Use the given heat-of-formation data to calculate the heat of reaction for each of the following. Solve each by combining the
1. 3 answers
2. 1,124 views
The standard molar heat of vaporization for water is 40.79 kJ/mol. How much energywould be required to vaporize 2.00 mol of
1. 2 answers
2. 1,179 views
Find the mass of liquid water required toabsorb 4.73×104 kJ of heat energy on boiling. Answer in units of g.
1. 2 answers
2. 688 views
What mass of steam is required to release3.15×105 kJ of heat energy on condensation? Answer in units of g.
1. 2 answers
2. 693 views
Calculate ∆H0for the reaction 2 N2(g) + 5 O2(g) −→ 2 N2O5(g) given the data H2(g) + 1 2 O2(g) −→ H2O(ℓ) ∆H0 f =
1. 2 answers
2. 823 views
I really need help with this question, calculate the total pressure of a gaseous mixture containing 0.2 moles of Nitrogen, 0.4
1. 4 answers
2. 464 views
The sum of a AP is 26 and that of the next four terms is 74, Find the first term and the common difference
1. 3 answers
2. 749 views
Suppose we launch a scientific rocket straight up from sea level (at standard conditions) with apressure measuring device
1. 3 answers
2. 1,578 views
reacting species of C8H6NH, potassium hydroxide, aqueous ammonia, and calcium hydroxide
1. 2 answers
2. 597 views
The active ingredient in some antiperspirants is aluminum chlorohydrate, Al2(OH)5Cl. Analysis of a 2.000-g sample of
1. 4 answers
2. 3,273 views
The Fiedler family has up to $130,000 to invest. They decide that they want to have at least $40,000 invested in stable bonds
1. 2 answers
2. 683 views
Suppose a mutation occurs in the gene for a particular aminoacyl-tRNA synthetase. The mutation changes which amino acid is
1. 3 answers
2. 1,557 views
i have two piece of ribbon one is 17.5cm longer than the other and 1/3 of one ribbon is the same as 3/4 of the other what is the
1. 4 answers
2. 2,384 views
if some of water in calorimeter splash out when tranfering the metal block, will it affect the experiment result?
1. 5 answers
2. 4,714 views
You have a total of 52 dimes and quarters. You have 10 more quarters than dimes. Which system of equations can you use to find
1. 2 answers
2. 1,046 views
a printer prints 17 pages is 6 minutes. how many minutes per page
1. 7 answers
2. 1,512 views
An object is released from rest and falls in free fall motion. The speed v of the object after it has fallen a distance y is
1. 4 answers
2. 2,410 views
2.00g of carbonate reacts with excess hydrobromic acid. Use this balanced equation to fond the theoretical yield.Na2Co3 + 2HBr =
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2. 401 views
what are some examples of a suspension? i need help!!!
1. 1 answer
2. 426 views
100 meters of fencing is available to enclose a rectangular area next to a river .Give a function that can represent the area
1. 6 answers
2. 1,929 views
simplyfy if quadratic equation or not quadratic equation and arrange into quadratic equation form25-r2=4x
1. 1 answer
2. 462 views
a garden 7m by 12m will be expanded by planting a border of flowers,the border will be of the same width around the entire
1. 4 answers
2. 4,174 views
A certain first order reaction has a rate constant of 5.68 x 10–3 s–1 at 139°C and a rate constant of 8.99 x 10–1 s–1
1. 4 answers
2. 1,347 views
8. which of the following quotes from "the morning of june 281948" best describe the aversion that the public felt toward
1. 19 answers
2. 10,306 views
if expressed in square millimeter what is 25 square meter2:a football pitch which was originally 80m long had it length
1. 1 answer
2. 481 views
In one region the number of students in Math 101 is 20% more than the number of students in Math 123. If there are 480 students
1. 2 answers
2. 537 views
You are charged $279 on your credit card for a hotel stay, you call to complain about the unexpectedly high charge, but are told
1. 3 answers
2. 1,866 views
In one month a salesman sold a total of 30 cars and trucks. If three times the number of cars sold equals twice the number of
1. 3 answers
2. 954 views
Bryan invests $500 in an account earning 4% interest that compounds annually. If he makes no additional deposits or withdraws,
1. 2 answers
2. 1,371 views
how many grams of Zn metal would you use to prepare 6.8g of zinc chloride according the reaction: Zn(s)+2HCl(aq)->
1. 1 answer
2. 393 views
how many grams of Zn metal would you use to prepare 6.8g of zinc chloride according the reaction: Zn(s)+2HCl(aq)->
1. 1 answer
2. 436 views
show that theoretically the period of rotation of a satelite which circles a planet of negligible distance firm its surface
1. 3 answers
2. 605 views
A cyclist travels for 60km at x km/h and 180km at y km/h and takes 10 hours altogether for the journey. If the speed are
1. 6 answers
2. 2,706 views
The numerator of a fraction , equivalent to 3/4, is increased by an amount so that the value of the resulting fraction is 5/2.
1. 2 answers
2. 1,164 views
Given BE = 11, EA = 11, BD = 7, and DC = 7, show that BED ~BAC
1. 1 answer
2. 484 views
Some molecules w/ non polar bonds like C-S and C-I when exposed to a highly polar environment may assume polarity-Due to vacant
1. 4 answers
2. 680 views
Write in exponential form.Log[base a]B=2
1. 1 answer
2. 466 views
I'm having troubles understanding how to find the directrix,focus and roots of the parabola y=x^2-5x+4. If you could explain it
1. 1 answer
2. 425 views
Indicate which type of comic each of the following represent.1) (x-3)^2/9+(y-2)^2/4=12. xy=3 5.(x+2)^2+(y-3)^2=49 6.x^2+4x=y-4
1. 1 answer
2. 293 views
Write a C++ program that will accept the marks in a test for a group of 25 students then calculate anddisplay the average mark
1. 2 answers
2. 675 views
A supplier of portable hair dryers will make x hundred units of hair dryers available in the market when the unit price isp =
1. 1 answer
2. 507 views
A supplier of portable hair dryers will make x hundred units of hair dryers available in the market when the unit price is p =
1. 4 answers
2. 632 views
The management of the Titan Tire Company has determined that the quantity demanded x of their Super Titan tires/week is related
1. 2 answers
2. 571 views
The demand function for a certain make of replacement cartridges for a water purifier is given by the following equation where p
1. 1 answer
2. 703 views
The demand function for a certain make of replacement cartridges for a water purifier is given by the following equation where p
1. 1 answer
2. 808 views
Compare Robert Fulghum’s list of things learned in kindergarten (see the Connection on page 72) to Franklin’s list of
1. 4 answers
2. 1,919 views
5. A woman is wearing her seat belt while driving 95km/h. She finds it necessary to slam on her brakes, and she slows uniformly
1. 1 answer
2. 744 views
An arrow is aimed horizontally, directly at a target 20.6 meters away. when the arrow is released, it lands 0.095 meters below
1. 3 answers
2. 2,168 views
A .7567 impure KHP was dissolved in water. 26.7 ml of standardized 0.068 M NaOH was used to achieve a phenolphthalein end point.
1. 2 answers
2. 593 views
a 50ml aliquot sample of vinegar is titrated with a 0.078 M NaOH sol'n. The phenolpthalein end point was reached after the
1. 3 answers
2. 829 views
A motor boat whose speed is 2.6 m/s in still water, needs to point upstream at an angle of 28.5 in order to travel straight
1. 3 answers
2. 1,118 views
the mass of a certain mixture of BaO and CaO is found to be exactly one half that of the mixed sulfates formed from it by the
1. 2 answers
2. 735 views
a car traveled a distance of 195 miles in 3 hours 15 minutes what is the unit rate ?oris it answer 60 miles per hour
1. 2 answers
2. 1,035 views
a car travelved a distance of 195 miles in 3 hours 15 minutes what is the unit rate
1. 2 answers
2. 588 views
During the bitter struggle over reconstruction policy, Congress overrode Johnson's veto of the
1. 3 answers
2. 551 views
Which of the following nineteenth -century inventors is associated with Menlo Park in New Jersey?A. Gustavus F. Swift B.
1. 1 answer
2. 488 views
General Grant's army came closest to defeat in the West as a result of a surprise Confederate attack atthe Battle of
1. 1 answer
2. 476 views
A 50 N girl climbs the ladder with a 60 N painting in 5 seconds. She has done 120 J of work. How much power does she need?
1. 3 answers
2. 696 views
How does KH2PO4 induce controlled flocculation?
1. 3 answers
2. 540 views
How does KH2PO4 induce controlled flocullation?
1. 1 answer
2. 828 views
Given that the mass and radius of jupiter are respectively 190000000kg 7150000km.Calculate the escape velocity from the surface
1. 1 answer
2. 430 views
what is common to the variation in the range and the hieght of a projectile. I'm thinking of horizontal acceleration pls what do
1. 1 answer
2. 291 views
A force of 2i+7jN acts on a body of mass 5kg for 10 seconds. The body was initally moving with constant velocity of i-2jm/s.Find
1. 2 answers
2. 810 views
(Q1)a+3b+2c=3,2a-b-3c=-8,5a+2b+c=9.solve for a,b&c by matrix method. (a)2,9,3(b)4,(-3),1(c)7,5,5(d)3,(-4),7
1. 2 answers
2. 455 views
ferrous sulphate + sodium hydroxide forms ppt. ferrous hydroxide + sodium sulphate is left in the solutionwrite a balanced
1. 2 answers
2. 1,131 views
a study found 37% of a new technique resulted in pregnancy and in that technique 25% resulted in multiple birthswhat is the
1. 1 answer
2. 366 views
according to carl jung what are the two main ways people process information
1. 3 answers
2. 828 views
A circular plate of radius 0.5 m is placed perpendicular to the direction of the magnetic field of 0.5 Tesla. What is the change
1. 2 answers
2. 547 views
Use Excel’s PMT function to calculate the monthly mortgage payment
1. 1 answer
2. 463 views
1=radical3-3p-2p
1. 1 answer
2. 274 views
what pressure (in atm) would be exerted by 76g of fluorine gas in a 1.5 litre vessel at -37 degrees Celsius?
1. 4 answers
2. 5,038 views
Phosphoric acid is a triprotic acid with the following pKa values:pKa1=2.148 pKa2=7.198 pKa3=12.375 You wish to prepare 1.000 L
1. 1 answer
2. 763 views
Carbon dioxide dissolves in water to form carbonic acid, which is primarily dissolved CO2. Dissolved CO2 satisfies the
1. 2 answers
2. 606 views
calculate the mass in grams of hydrogen chloride produced when 5.25 L of a molecular hydrogen measured at STP reacts with an
1. 2 answers
2. 1,343 views
If 3.12 kg of S are reacted with oxygen calculate the volume of SO2 gas in mL formed at 35 degrees Celsius and 1.09 atm
1. 2 answers
2. 625 views
For the reaction 2A(g) + B(aq) + 3C(l)<------> D(s) + 3E(g), the concentrations at equilibrium are found to be:A: 2.3x10^3 Pa B:
1. 2 answers
2. 780 views
the concentrations and pressures at equilibrium were found to be: 1.6 × 10–2 M for A, 8.1 × 103 Pa for B, 13.6 M for C, 13.1
1. 4 answers
2. 341 views
the coefficient of friction between a block of weight 15N and a horizontal board on which it is resting is 3.0find the
1. 2 answers
2. 563 views
A proton (mass m = 1.67 10-27 kg) is being accelerated along a straight line at 2.1 1015 m/s2 in a machine. The proton has an
1. 2 answers
2. 812 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. 2 answers
2. 927 views
mark recently completed a math course in which he took three tests. his scores were 80,75,85 each time out of 100 points. What
1. 1 answer
2. 323 views

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