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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. 0 answers
2. 807 views
Carbon dioxide dissolves in water to form carbonic acid, which is primarily dissolved CO2. Dissolved CO2 satisfies the
1. 0 answers
2. 641 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. 1 answer
2. 1,388 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. 1 answer
2. 649 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:
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2. 808 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. 3 answers
2. 374 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. 1 answer
2. 612 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. 1 answer
2. 841 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.
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2. 954 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. 357 views
An airplane flies 200km due west from city A to city B and then 305km in the direction of 33.5 degrees north of west from city B
1. 1 answer
2. 3,649 views
A girl delivering newspapers covers her route by traveling 10.00 blocks west, 4.00 blocks north, and then 5.00 blocks east.a.)
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2. 785 views
a person walks 13.0 degrees north of east for 3.80km. How far due north and how far due east would she have to walk to arrive at
1. 1 answer
2. 540 views
A bag contains ﬁfty slips (small pieces of paper) with the numbers 1, 2, . . . , 50 written on them(One number on each slip!).
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2. 649 views
the front wheel of a bicycle has a diameter of 16 in and the back wheel has a diameter of 26 in. through what angles does the
1. 1 answer
2. 580 views
A cryogenic storage container holds liquid helium, which boils at 4.20 K. Suppose a student painted the outer shell of the
1. 1 answer
2. 550 views
A copper sheet of thickness 2.19 mm is bonded to a steel sheet of thickness 1.13 mm. The outside surface of the copper sheet is
1. 0 answers
2. 624 views
What is the size of the smallest craater on the moon that you can see with a telescope with a resolution of 2 arc seconds at a
1. 1 answer
2. 386 views
What is the maximum altitude above the horizon at which it is possible to find the moon when you are observing from a position
1. 1 answer
2. 386 views
What is the radius of the sun?
1. 1 answer
2. 498 views
There were 20% more boys than girls in a swimming club. After 50 girls left, there were twice as many boys as girls in the club.
1. 1 answer
2. 505 views
The ratio of the number of girls to the number of boys in a stamp club was 3 : 2 last year. When 15 boys joined the club this
1. 1 answer
2. 1,017 views
There were 20% more boys than girls in a swimming club. After 50 girls left, there were twice as many boys as girls in the club.
1. 1 answer
2. 1,294 views
top and bottom margins are 7/8 inch there are 5 rows of pictures with 3/16 inch between the vertical what would be the height of
1. 1 answer
2. 886 views
Three lead balls of massm1 = 14 kg, m2 = 26 kg, and m3 = 8.7 kg are arranged as shown in the figure below. Find the total
1. 0 answers
2. 520 views
A crate is pulled to the right with a forceof 84.5 N, to the left with a force of 116.5 N, upward with a force of 685.7 N, and
1. 0 answers
2. 719 views
Sue and Jenny kick a soccer ball at exactlythe same time. Sue’s foot exerts a force of 52.7 N to the north. Jenny’s foot
1. 0 answers
2. 640 views
Some genes are said to be “linked”. Explain this term and the implications it has as to the inheritance of certain traits.
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2. 431 views
Some genes are said to be “linked”. Explain this term and the implications it has as to the inheritance of certain traits.
1. 0 answers
2. 414 views
Maria throws an apple vertically upward froma height of 1.3 m with an initial velocity of +2.6 m/s. Will the apple reach a
1. 4 answers
2. 2,735 views
a 60 kg object is attached to one end of a 40 kg steel tube 2.4 m long. what is the distance from the loaded end to the balance?
1. 1 answer
2. 509 views
Determine , apermutation or combination1.The winner and second and third placed in contest woth 10 finalists . 2.Selecting nine
1. 3 answers
2. 540 views
Decide if it's permuatation or combination .1-how many teams of 4 horses be made if there were 9 horses in total ? 2-mike has
1. 1 answer
2. 647 views
Decide if it's permuatation or combination .1-how many teams of 4 horses be made if there were 9 horses in total ? 2-mike has
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2. 643 views
what does it mean by how many moles of the limiting reactants in sodium bia
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2. 317 views
If f(x)= 1 + ln(x+2), then f^-1 (x)is...?
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2. 277 views
Suppose that f(x) = 1/x. Find a simplified expression for f(x)-f(a)/x-a
1. 2 answers
2. 457 views
For the curve y=2^[sqrt(9-x2)], find the range of the function.I think the range is [0,8] but I don't know why. Could you show
1. 3 answers
2. 475 views
In Geometry how do I calculate the precion of 14 meters?
1. 1 answer
2. 703 views
tripling the greater of two consecutive even integers gives the same result as subtracting 10 from the lesser even integer.what
1. 1 answer
2. 745 views
suppose you invest some money in an account at 6% compounded monthly, after four years you have $8000, how much interest did you
1. 1 answer
2. 414 views
A woman who is 6-ft tall casts a 4.5-foot shadow at the same time that a building casts a 75-foot shadow. What is the height of
1. 2 answers
2. 702 views
Using the broad definition of a product, identify and explain what products are being offered by a shop that specializes in
1. 1 answer
2. 488 views
How might you use different types of research (focus groups, observation, survey, and experiment) to forecast market reaction to
1. 0 answers
2. 380 views
the solubility product of PbSO4 at 298K is 1.6x10^-8 mol^2dm^-6. Calculate the solubility of PbSO4 in 0.10mol dm^-3 sulphuric
1. 2 answers
2. 3,759 views
the solubility product of PbSO4 at 298K is 1.6x10^-8 mol^2dm^-6. Calculate the solubility of PbSO4 in pure water
1. 1 answer
2. 652 views
i need synonyms, antonyms, and sentences that use the following words please:illusion consecutive horizon thank you so much!
1. 1 answer
2. 513 views
what are some antonyms and synonyms for the words:illusion (noun) horizon (noun) consecutive (adjective) debut (noun) gross
1. 1 answer
2. 568 views
what is the answer to did you hear about... on worksheet page 106
1. 6 answers
2. 2,122 views
A childs ability to jumpfor distance is an example ofAgility or Flexability
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2. 803 views
Which is a suitable toy for a toddler ?A a riding toy or B a walker I think it is A.
1. 3 answers
2. 365 views
A child who struggles to climb into a chair is confronting what kind of hazzard?B physcal or D enviromental
1. 4 answers
2. 491 views
children should not be served drinks in containers made ofA. styrofoam B. uninsulated paper C. treated ceramic D. stainless
1. 8 answers
2. 460 views
A child who hasn't learned prerequisite fundamentals needed for a combination of motor patterns is suffering fromA anxiety B
1. 2 answers
2. 415 views
A child throws a ball with speed and accuracy when he throws a ball to his teacher but his throws are slower and less accurate
1. 4 answers
2. 583 views
A child who hasn't learned the prequisite fundamentals needed for a combition of motor paterns is suffering fromA. anxiety B.
1. 2 answers
2. 519 views
a class of pupils obtained results on a bar chart during a seashore investigation. they sampled the numbers of different
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2. 452 views
You have a 15.0 kg block of wood and you drop it from rest at a great height. It reaches terminal velocity of 31.3 m/s. If this
1. 0 answers
2. 504 views
given the function F(x)=7x+8. find each of the followingf(10)= f(-6)= f(0)= please explain
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2. 341 views
-7/3x+2/3=-11
1. 1 answer
2. 280 views
a ball (mass = 0.250 kg) is kicked off a porch (h = 1.50 m above the ground) with an initial velocity of 17.0 m/s at an unknown
1. 0 answers
2. 482 views
a 100 mL {100 grams} of water at 4.0 degrees celsius is heated until its tempurture is 37 degrees celcus. if the specific heat
1. 0 answers
2. 528 views
a 100 mL {100 grams} of water at 4.0 degrees celsius is heated until its tempurture is 37 degrees celcus. if the specific heat
1. 0 answers
2. 669 views
A block (m = 38.0kg) sits on an inclined plane of 38 degrees. If there is no friction,k what magnitude force is needed to keep
1. 0 answers
2. 422 views
We first meet juliet (act 1 scene 3) she has a conversation with her mother about marriage. discuss this. what do we learn about
1. 7 answers
2. 631 views
A car, mass - 1950 kg, accelerates at +2.33 m/s (squared). Find the magnitude of the normal force acting on the car. If later,
1. 2 answers
2. 614 views
I need to convert 40mg/mL to 5mg/mL with distilled water. How much distilled water would I use to do this?
1. 1 answer
2. 445 views
Calculate the molarity of a 295 mL solution contain 45 g of ethanol (C2H5OH)
1. 1 answer
2. 696 views
I do not know how to do this problem, please help.(35b^3 + 25b^2 + 30b + 44)divided by (5b + 5)
1. 1 answer
2. 429 views
Please I do not know how to figure this out:Identify the degree of each term of the polynormial and the degree of the
1. 1 answer
2. 1,017 views
Again I have no clue in figuring out this problem, please help:(3s^4-3s^3+3s^2+13s-6) + (s^5+8s^3+6s^2-3s+3) + (-6s^4+s^2-7s-6)=
1. 1 answer
2. 904 views
Again I have no clue in figuring out this problem, please help:(3s^4-3s^3+3s^2+13s-6) + (s^5+8s^3+6s^2-3s+3) + (-6s^4+s^2-7s-6)=
1. 1 answer
2. 472 views
Please I do not know how to figure this out:Identify the degree of each term of the polynormial and the degree of the
1. 1 answer
2. 509 views
Please help:Multiply and simplify: (5sqrt:5 - 10sqrt:3)(2sqrt:5 + 4sqrt:3)
1. 1 answer
2. 808 views
Help:Divide: (35b^3+ 25b^2 + 30b +44) divided by (5b + 5)
1. 0 answers
2. 448 views
Please I need help:Find the vertex, the line of symmerty and the maximum or minmum value of the quadratic function: f(x)=
1. 1 answer
2. 369 views
Please help:If the sides of a square are lingthened by 7cm, the area becomes 169cm^2. Fine thelength of a side of the orginal
1. 1 answer
2. 421 views
Need help. please help:Solve and simplify, use comma to separate answers: sqrt:9x+55=x+5
1. 1 answer
2. 390 views
I do npot understand how to do this problem, please help:4y/y^2-y/y-3
1. 2 answers
2. 431 views
Please I need help!Solve and simplify: x^2+14x-4=0
1. 1 answer
2. 362 views
what is the next number sequence for 0,10,24,56,112,190
1. 3 answers
2. 1,916 views
Can somebody help me restate my thesis please. statement for the conclusion.My thesis is: An analysis of the literary devices in
1. 1 answer
2. 606 views
Hi everyone,Why are metals more reactive in acids? Thanks
1. 1 answer
2. 409 views
if volcanos and earthquakes, why do people choose to live in the area where it occurs the most?
1. 0 answers
2. 456 views
1) show thata) 2(2n-1 C n-1) = (2n Cn) b) n(2n C n) = (n+1)(2n C n+1)
1. 0 answers
2. 293 views
is " but I will not allow anyone to succeed hanging clouds over me" a metaphor or paradox or is it something else?is "there's a
1. 0 answers
2. 564 views
can somebody tell where the poetic devices are located in the song cant take that away by mariah carey? such as metaphor, mood
1. 1 answer
2. 637 views
1) solve:a) (2n+1C2) = (nC2)sqaured b) 12(nC2) = n!
1. 1 answer
2. 643 views
1. Consider a population with µ=73.6 and 0 = 5.38(A) Calculate the z-score for x =72.7 from a sample of size 45. (B) Could this
1. 1 answer
2. 1,031 views
you want to take an 8-ft.wide piece of plywood through a 36-inch-wide door. What is the minimum possible height for the door to
1. 1 answer
2. 442 views
two cars leave the same point at noon. one car travels north and the other car travels east. suppose the northbound car is
1. 1 answer
2. 679 views
two cars leave the same point at noon. one car travels north and the other car travels east. suppose the northbound car is
1. 2 answers
2. 760 views
Consider a population with µ=73.6 and 0 = 5.38(A) Calculate the z-score for x =72.7 from a sample of size 45. (B) Could this
1. 1 answer
2. 525 views
hello ya im helping my son homework.regarding estimation to get reasonable range. Three classes collected aluminum cans for
1. 1 answer
2. 551 views
hello ya im helping my son homework.regarding estimation to get reasonable range. Three classes collected aluminum cans for
1. 2 answers
2. 599 views
Find the normal approximation for the binomial probability that x = 5, where n = 12 and p = 0.7. Compare this probability to the
1. 2 answers
2. 831 views
3/4-1/3z=1/45/6c-2/3c=1/3 please show step by step Thanks!
1. 2 answers
2. 422 views
3/4 - 1/3z= 1/4please show step by step to ans.
1. 1 answer
2. 483 views
2(a-4)+15=13Please show step by step
1. 2 answers
2. 980 views
4NH3 + 5O2 → 4NO + 6H2O2NO + O2 → 2NO2 3NO2 + H2O → 2HNO3 + NO In this process, the NO made in the last reaction is
1. 2 answers
2. 2,140 views

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