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Katherine

Questions (390)

Nelda is fearful of public places and has managed to stay "at home" for the last three years. She and her therapist have
1. 0 answers
2. 538 views
26. Emily and her mother have entered a new place. There are toys on the floor to play with, but no one else is in the room.
1. 3 answers
2. 1,363 views
25. Teenage mothers who are accustomed to existing on hamburgers, French fries, and Cokes need to consider the nutritional needs
1. 1 answer
2. 606 views
19. If Paul and Rita are exposed to erotic photographs of the opposite sex, it can be expected that _______________. A. Rita
1. 1 answer
2. 498 views
15. Maria is a Hispanic female, Natasha is a Black female, and Joan is a White female. Each has a high school level education
1. 1 answer
2. 465 views
16. Greg and Lydia have been married three years. Both hold executive positions in large corporations and are well respected in
1. 3 answers
2. 404 views
Families traveling with young children often make many stops as a result ofA. Primary drives B. Secondary drives C. Incentives
1. 3 answers
2. 414 views
The entire class was in an uproar. The teaching assistant had proctored the exam while the professor was attending a conference
1. 2 answers
2. 466 views
A man driving a car toward a large vertical wal sounds his horn. The car is traveling at 81 km/h. The echo off the wall is heard
1. 1 answer
2. 890 views
use the van der waals equation to calculate the pressure of 4.00 mol of H20 at 471K in a 4.60-L vessel. how do you solve?
1. 1 answer
2. 1,193 views
By titration it is found that 76.3Ml of 0.178M of NaOH(aq) is needed to neutralize 25.00mL of HCL(aq). Calculate the
1. 1 answer
2. 528 views
Suppose we have a solution of lead nitrate, Pb(NO3). A solution of NaCl(aq) is added slowly until no further precipitation
1. 1 answer
2. 1,367 views
What mass of precipitate will form if 1.50L of concentrated Pb(ClO3)2 is mixed with 0.200L of 0.280M of NaI? Assume the reaction
1. 1 answer
2. 1,473 views
What is the significance of the distance between two metals in the activity series?
1. 3 answers
2. 1,219 views
How are petitions and Demonstrations similar?
1. 5 answers
2. 570 views
African amirican used both petitions and demonstrations to fight for cilvil rights?
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2. 392 views
how are they different?
1. 1 answer
2. 297 views
African Amrican used both petitions and demonstrations to fight for the cilvl rights?
1. 1 answer
2. 422 views
the American contitution is base on which belief?
1. 1 answer
2. 359 views
How many seconds does it take for mercury to go from 0 degrees celsius to 300 degrees celsius?
1. 2 answers
2. 465 views
How do I work this problem? "Susan is 9 years older than Karen. In 10 years Karen will be 2/3 Susan's age. How old will the two
1. 2 answers
2. 629 views
11/12-1/9=
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2. 244 views
Water (η = 1.00E-3 Pa·s) is flowing through a horizontal pipe with a volume flow rate of 0.0153 m3/s. As the drawing below
1. 0 answers
2. 636 views
These are “plug-in-the-number” tasks to familiarize you with themain formulas that link the physics concepts of this
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2. 545 views
These are “plug-in-the-number” tasks to familiarize you with themain formulas that link the physics concepts of this
1. 1 answer
2. 509 views
Show that the average speed of a rabbit that runs a distanceof 30 m in a time of 2 s is 15 m/s. I have a whole bunch of problems
1. 2 answers
2. 3,787 views
I need help on this question..."Make a conjecture about the next item in the sequence. 1,-2,-5,-8,-11,? Please help...
1. 2 answers
2. 1,804 views
Indicate the number of equivalents in each of the following:4mol Mg2+ 0.1mol H+ 2mol Cl- 3mol Fe3+
1. 3 answers
2. 10,388 views
I need help on this question...please help."The measures of two supplementary angles are 3x-12 and 4x-18.Find the measures of
1. 2 answers
2. 1,207 views
Is it true medical assisting are licensed by each state?
1. 1 answer
2. 420 views
The voltage generated by the zinc concentration cell described by,Zn(s)|Zn2+ (aq, 0.100 M)||Zn2+ (aq, ____ M)|Zn(s) is 24.0 mV
1. 2 answers
2. 18,885 views
Calculate the cell potential for the following reaction as written at 51 degrees C, given that [Zn2+] = 0.837 M and [Sn2+] =
1. 1 answer
2. 1,385 views
Calculate delta G of the reaction at 25 degrees C: 2Au^3+ (aq) + 3Ni(s) <=> 2Au(s) + 3Ni^2+(aq)Au3+ + 3e- ==> Au Eo = +1.50V
1. 3 answers
2. 5,381 views
Consider two cells, the first with Al and Ag electrodes, and the second with Zn and Ni electrodes, each in appropriate 1.00M
1. 7 answers
2. 7,678 views
A current of 5.18 A is pass through a Cr(NO3)2 solution for 1.20 hours. How much chromium is plated out of the solution? __gI
1. 2 answers
2. 3,995 views
The voltage generated by the zinc concentration cell described by,Zn(s)|Zn2+ (aq, 0.100 M)||Zn2+ (aq, ____ M)|Zn(s) is 24.0 mV
1. 1 answer
2. 811 views
why are plastic handles on frying pans safer to than metal handles
1. 3 answers
2. 623 views
I'm a bit iffy on oxidation numbers... can someone please tell me if this is correct?Assign oxidation states to each element on
1. 1 answer
2. 1,426 views
There is a current being applied to an aqueous solution fo sodium bromide. What is produced at the cathode and anode?I said that
1. 2 answers
2. 2,611 views
I keep getting the last part of this question wrong.Strong base is dissolved in 765 mL of 0.200 M weak acid (Ka = 4.63 x 10^-5)
1. 1 answer
2. 1,890 views
Calculate the final concentration for the standardization of KMnO4 given this information:2MnO4- + 5C2O4^-2 + 16H+ -> 2Mn^2+ +
1. 4 answers
2. 2,618 views
If f(x)=x^2 –4, ... x > or equal to 0and g(x)=sqrt(x+4) ... x > or equal to –4 , (a) f(g(x))= (b) g(f(x))= (c) Thus g(x) is
1. 0 answers
2. 415 views
Find the volume of the solid obtained by rotating the region bounded by the given curves about the x-axis?y=x^2 x=y^2 about the
1. 1 answer
2. 402 views
When finding the break even point, I know that total fixed costs/contribution margin= Break Even Point, but is that answer in
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2. 450 views
A solution in which no more solid can be dissoved is referred to as [saturated?] In such a solution, the concentration of solute
1. 3 answers
2. 556 views
If a buffer solution is 0.190 M in a weak acid (Ka = 5.8 x 10^-5) and 0.550 M in its conjugate base, what is the pH?What if it
1. 2 answers
2. 1,528 views
What is the longest wavelength that can be heard by a normal ear?
1. 1 answer
2. 569 views
Calculate the concentrations of all species in a 0.810 M Na2SO3 (sodium sulfite) solution. The ionization constants for
1. 5 answers
2. 1,335 views
C6H5COOH(aq) + NO2-(aq) <=> C6H5COO-(aq) + HNO2(aq)A table of ionizations is given to calculate the equilibrium constant for
1. 2 answers
2. 1,394 views
Calculate the concentrations of all species in a 0.810 M Na2SO3 (sodium sulfite) solution. The ionization constants for
1. 6 answers
2. 5,547 views
A solution household bleach contains 5.25% NaClO, by mass. Assuming that the density of bleach is the same as water(1.0g/ml).
1. 2 answers
2. 7,378 views
At 25 degrees Celsius all of these are true for a neutral solution : pH = 7.00, pOH = 7.00, and [H+] = [OH-] is that correct?For
1. 5 answers
2. 5,286 views
If a chlorine atom is lost from 1,2-dichloroethene [C2H2Cl2], would it have a higher or lower dipole?
1. 2 answers
2. 339 views
Assume equal concentrations, rank these solutions by pH HBrO, Ca(OH)2, HCl, KOH, NH3Here's how I ranked it: highest: Ca(OH)2 >
1. 2 answers
2. 4,059 views
When an excess of CaO is added to 200.0 mL of 0.500 M HCl(aq), a temperature increase of 4.01C is observed.Assume the solution's
1. 1 answer
2. 445 views
A 0.450-gram sample of impure CaCO3(s) is dissolved in 50.0 mL of 0.150 M HCl(aq). The equation for the reaction is:CaCO3(s)+2HC
1. 1 answer
2. 8,982 views
What NaCl concentration results when 209 mL of an 0.660 M NaCl solution is mixed with 492 mL of a 0.270 M NaCl solution?__
1. 2 answers
2. 6,235 views
I'm having a problem with a simple conversion question!"What is the molarity of 30.0 g of NH3 in 70.0 g of water? The desnity of
1. 1 answer
2. 564 views
Calculate the equilibrium constant for the following reaction at 100°C.2 TiCl3(g)+2 HCl (g) = 2 TiCl4(g)+H2(g) ∆G°rxn = +
1. 1 answer
2. 712 views
Using the following data calculate Delta Sfus and Delta Svap for K in J/mol-kTm(K) = 336, Delta H Fus(kJ/mol) = 2.33, Tb (K) =
1. 2 answers
2. 11,377 views
For the reaction described by the chemical equation:3C2H2(g) -> C6H6(l) .. Delta H rxn = -633.1 kJ/mol a) Calculate the value of
1. 5 answers
2. 14,532 views
Delta H is 20.1 kJ/mol and Delta S is 45.9 J/(mol-k). Assuming these values change very little with temperature, over what
1. 2 answers
2. 1,828 views
Is it even possible to guess the signs of Delta H, S, and G from only knowing the following information?:- Silica gel is a
1. 2 answers
2. 986 views
Under standard conditions (298 K and 1 atm), which statement is true?a] diamond converts to graphite spontaneously b] graphite
1. 4 answers
2. 12,960 views
In an exam, we randomly chose some students who get both the pretest and the posttest. We are interested in the difference of
1. 0 answers
2. 626 views
can bacteria form biofilms on sharklet
1. 1 answer
2. 320 views
Confused! Please help!!Assume an organic compound has a partition coefficient between water and diethyl ether equal to 6.63. If
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2. 598 views
Hydrazine, N2H4 can be made (on paper) by reaction of molecular nitrogen and molecular hydrogen,2 H 2 ( g ) + N 2 ( g ) --> N 2
1. 0 answers
2. 762 views
Lighting hit a tree three-eighths of the distance up the trunk from the ground and broke the tree so that its top landed 40 feet
1. 1 answer
2. 1,224 views
Which of the following inequalities has x > 4 as a solution?A: 6x < -24 B: x + 4 > 0 C:-5x + 2 < -18 D: 4x + 2 > 14
1. 1 answer
2. 416 views
Luisa and Connor had $360 altogether. After Connor gave Luisa 2/5 oh his money, she had the same amount of money as he did. How
1. 2 answers
2. 646 views
Luisa and Connor had $360 altogether. After Connor gave Luisa 2/5 oh his money, she had the same amount of money as he did. How
1. 2 answers
2. 2,150 views
The ratio of the number of postcards john had to the number of postcards Zachary ha d was 4:9. Zachary had 45 more postcards
1. 0 answers
2. 561 views
The ratio of the number of postcards john had to the number of postcards Zachary ha d was 4:9. Zachary had 45 more postcards
1. 3 answers
2. 2,950 views
The molar heat capacity of silver is 25.35 J/mol*C. How much energy would it take to raise the temperature of 12.0 g of silver
1. 2 answers
2. 821 views
Daniel gave 4/5 of his stickers to Javier. Javier’s collection of stickers increased to 64. If Javier had 28 stickers in the
1. 4 answers
2. 2,687 views
Daniel gave 4/5 of his stickers to Javier. Javier’s collection of stickers increased to 64. If Javier had 28 stickers in the
1. 1 answer
2. 678 views
Amanda is 12 years old. She is 2/7 times as old as her father. How many years ago was her father 4 times as old as Amanda.
1. 5 answers
2. 2,949 views
How many degrees are in the angle between the hands of a clock at 8:00?
1. 2 answers
2. 770 views
In a department store, there were a certain number of red T-shirts, blue T-shirts, and yellow T-shirts. 3/7 of the T-shirts were
1. 1 answer
2. 874 views
Hitomi has a total of 30 red and blue bowling balls at her bowling alley. Each red ball weighs 8 lb. Each blue ball weighs 9 lb.
1. 6 answers
2. 2,593 views
Hitomi has a total of 30 red and blue bowling balls at her bowling alley. Each red ball weighs 8 lb. each blue ball weighs 9 lb.
1. 2 answers
2. 671 views
Tierra, Nico, and Alex had $865 altogether. Tierra spent 2/5 of her money. Nico spent $40 , and Alex spent twice as much as
1. 2 answers
2. 1,427 views
(tan/(1+sec)) + ((1+sec)/tan) = 2csc(Show all work please.)
1. 2 answers
2. 561 views
The ratio of boys to girls in a school choir is 4:3. There are 6 more boys than girls. If another 2 girls join the choir, what
1. 2 answers
2. 813 views
The ratio of boys to girls in a school choir is 4:3. There are 6 more boys than girls. If another 2 girls join the choir, what
1. 1 answer
2. 588 views
Consider the isothermal expansion of 4.50 mol of an ideal gas at 450 K from an initial pressure of 12.0 bar to a final pressure
1. 0 answers
2. 710 views
find the measures of the angles on a nonagon???? and the formula used to find it
1. 1 answer
2. 475 views
Susan has 50ft of fencing to use to build a garden in her backyard.A: The shape must be a rectangle/square. B: Sketch at least
1. 1 answer
2. 583 views
A 4-kg sled sliding freely on an icy surface experiences a 2 _ N frictional force exerted by the ice and an air-resistive force
1. 2 answers
2. 5,759 views
Take two Styrofoam cups, partially fill them with equal amounts of cold water, and dropequal amounts of ice into each cup to
1. 1 answer
2. 1,966 views
A hammer is used to pound a piece of sot metal into a new shape. If the metal is thermally insulated from its surroundings, will
1. 1 answer
2. 883 views
Lily went for 8 rides at the county fair. Some rides were on the merry-go-round, and the rest were on the pirate ship. The total
1. 1 answer
2. 676 views
Lily went for 8 rides at the county fair. Some rides were on the merry-go-round, and the rest were on the pirate ship. The total
1. 1 answer
2. 713 views
an old tv is 27 inches the new tv is 42 inches.... how much bigger is the new tv that the old tv...if the odl tv has 27 inches
1. 4 answers
2. 424 views
Andy had 20% fewer marbles than Henry. When Andy gave 80 marbles to Henry, the numbers of marbles he had left was half of what
1. 0 answers
2. 483 views
What are the cell walls of fungi made of?
1. 1 answer
2. 403 views
Andy had 20% fewer marbles than Henry. When Andy gave 80 marbles to Henry, the number of marbles he had left was half of what
1. 3 answers
2. 591 views
Andy had 20% fewer marbles than Henry. When Andy gave 80 marbles to Henry, the number of marbles he had left was half of what
1. 3 answers
2. 878 views
a student said that all squares are rectangles, but not all squares are rhombuses.What was the error??
1. 5 answers
2. 1,246 views

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