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Jin
Questions and answers by visitors named
Jin
Questions (91)
An orange rolls across a table with a speed of 0.5 m/s and falls off the edge. If it lands 3 m from the edge of the table, from
6 answers
8,377 views
I had to observe slides of onion root tip to study plant mitosis. And the question I have to answer asks,if your observations
3 answers
919 views
Write balanced equations and solubility product expressions for the solubility equlibria of the following compounds:
a. CuBr b.
4 answers
3,697 views
The values of Ksp for AgBr and AgCl, are 7.7x10^-13 and 1.6 x 10^-10. A solution containing a mixture of 2.0x10^-2 M Br and 2.0
3 answers
959 views
How do you know if these solutions are acidic, basic, or nearly neutral?
a. NH4NO2 b. Cr(NO3)3
4 answers
6,272 views
For 1980 through 1990, the average weekly earnings (in dollars)for workers in the United States can be modeled by E= 14.5t +
3 answers
1,840 views
I know how environmental science branches off to various sciences-
how does astronomy (to be specific, the discovery that Pluto's
2 answers
576 views
Are there any connections between evolution and environmental science-- if there is, what is it?
Thanks! Weren't many lakes back
1 answer
385 views
I'm having trouble understanding what kind of sentences these are:
Compound? Compound-complex? Declarative? Interrogative?
1 answer
451 views
what is the derivative of sin(x^(1/2)) and (sin(x))^(1/2)?
Is there a difference? Thanks! Yes, there is a difference. Use the
1 answer
319 views
How would you define balanced sentences?
Could you give me some examples? Thanks! Balance in writing sentences is generally
1 answer
555 views
I am finding the second derivative of (x^2)(y^3) = 1
2x(y^3) + (x^2)(y')(3y^2) = 0 And I simplified the answer to y'= (-2y)/(3x)
1 answer
631 views
Need help in unscrambling this phrase:
MTLEFKOTRYETEEMCISRTRAE for what subject?Is this for What subject is this for? capilpsean
6 answers
1,197 views
Find the volume of the solid whose base is the region bounded by the graphs of y=x^3,x=1, and the x-axis, and whose cross
1 answer
423 views
If you have a geometric alternating series, and you prove that the series is converging by doing geometric series test, and NOT
1 answer
537 views
I know how to find the interval of convergence, but I don't understand when to check for convergence at the endpoints (to see if
1 answer
435 views
Topic being the linearization (finding the equation of the tangent lines), how do you determine if it's overestimate or
1 answer
365 views
why does pH of the matrix increase when electrons flow along the electron transport chains of mitochondria?
2 answers
589 views
What effect does water loss (through heavy perpiration) have on a person's endocrine system?
2 answers
499 views
Would you expect the dissolved oxygen concentration of water samples taken from a lake at 7 am to be higher or lower than
5 answers
1,136 views
How does the frequency of interest compounding, regardless of the rate of interest or period of accumulation, affect the future
1 answer
406 views
How does discounted cash flow differ from the other valuation methods?
1 answer
379 views
In Figure (a), a block of mass m lies on a horizontal frictionless surface and is attached to one end of a horizontal spring
4 answers
4,715 views
A skier leaves the end of a ramp with a velocity of 25.3 m/s and lands 50.3 m from the base of the ramp. How high is the end of
2 answers
538 views
Wile E. Coyote is holding a “HEAVY DUTY ACME ANVIL” on a cliff that is 40.0 meters high. The Roadrunner (beep-beep), who is
6 answers
4,857 views
The Fe(ox)33– complex ion creates an emerald green solution when dissolved.
The observed solution color of the complex
5 answers
605 views
how do you know which resonance structure is more stable according to the energy?
does higher energy mean more stable?
1 answer
383 views
how do you know which bonds have a more pie bonding character than the other bond?
and how do you know if it point to one
1 answer
427 views
for SCN-
if S-C has a bond order of 1, S=C and C=N have bond orders of 2, and C triple bond N hasa bond order of 3, ... Do the
3 answers
2,913 views
The pKa for hydrochloric acid is −6.0.
What is the concentration of HCl(aq) we would expect to find in a 1 M solution of
1 answer
444 views
Which reactants in the reactions below
are acting as Br©ªnsted-Lowry bases? NH4 +(aq) + OH−(aq) <-> NH3(aq) + H2O(l) H2PO4
2 answers
688 views
how do you solve this?
What is the pH of the solution created by combining 12.30 mL of the 0.10 M NaOH(aq) with 8.00 mL of the
1 answer
389 views
how do you solve this
What is the pH of the solution created by combining 2.60 mL of the 0.10 M NaOH(aq) with 8.00 mL of the 0.10
1 answer
403 views
Determine the overall orders of the reactions to which the following rate laws apply:
a) rate= k[NO2]^2 b) rate = k c) k
2 answers
720 views
how do you solve this problem?
consider the reaction A->B the rate of the reaction is 1.6 x 10^-2 M/s when the concentration of A
2 answers
1,203 views
the chapter is about chemical kinetics
Reaction mechanisms: What does it mean by mechanism of a reaction? What is an elementary
1 answer
456 views
How do you solve this problem?
In a certain industrial process involving a heterogeneous catalyst, the volume of the catalyst (in
3 answers
1,878 views
The amount of indicator used in an acid-base titration must be small. why??
2 answers
760 views
Solid NaI is slowly added to a soln that is 0.010M in Cu+ and 0.010M in Ag+.
a. Which compound will begin to precipitate first?
3 answers
1,004 views
Explain, with balanced ionic equations, why
a. CuI2 dissolves in ammonia solution b. AgBr dissolves in NaCN solution, c. HgCl2
3 answers
1,414 views
Discuss the spontaneity of an electrochemical reaction in terms of its standard emf (E¨¬cell)
4 answers
2,312 views
I had this on a test, not sure how to do it
Explain, using balanced chemical reactions with the smallest integer coefficients,
2 answers
870 views
7.50gram quantity of a diprotic acid was dissolved in water and made up to exactly 250ml. If 25ml of this solution were
4 answers
463 views
Determine the oxidation state of each transition metal in the following cmpds. (a) Na2MoO4 (b) KAuCl4 (c) MgWO4 and (d) Ni(CO)4
4 answers
1,579 views
To have a color, the transition metal complex
should have an electron in a d-orbital, and an unoccupied spot in a higher energy
1 answer
438 views
Faraday¡¯s Law of Electrolysis
• Practice Problem. • What is the oxidation state of the osmium atom in an unknown salt if
3 answers
838 views
why is it that [H2O] is NOT included in the rate law, even though it is a reactant?
1 answer
321 views
why is it that [H2O] is NOT included in the rate law, even though it is a reactant?
1 answer
413 views
Which of the following when added to 100.0mL of a 0.100M soln of NH4Cl would produce a buffer soln?
a.100.0mL of 0.100 M HCl soln
2 answers
670 views
In titration of a 0.10M soln of Na2Co3 with HCL which of the following will be present in the largest concentration at the first
2 answers
534 views
A salt that could decrease the ionization of HCOl in soln is probably
a. NaOH b. NaCl c. NaOCl d. NaH e. none of these how would
2 answers
1,113 views
Which of the following salts would show an appreciable pH-dependent solubility?
a. AgCl b. Mg(OH)2 c. BaF d. both b and c e. all
2 answers
592 views
how do you solve this?
The candy indistry converts sucrose (C11H22O11,table sugar),a crystalline material, to invert sugar, a
1 answer
391 views
Rates of chemical reactions usually depend on temperature and pressure. However, half-life of all radioactive elements is
2 answers
461 views
find the domain of function
f(x)= (5x + 4)/(x^2 + 3x + 2) is the answer.. x can't be -2 or -1?
3 answers
512 views
An open box is to be made from a flat piece of material 18 inches long and 2 inches wide by cutting equal squares of length
4 answers
2,581 views
if f(x)is
greater or equal to 10x–42 but less than or equal to x2+2x–26 determine limx4f(x) = What theorem did you use to
1 answer
394 views
If a ball is thrown straight up into the air with an initial velocity of 95 ft/s, it height in feet after t second is given by
4 answers
6,308 views
if f(x)is
greater or equal to 10x–42 but less than or equal to x2+2x–26 determine limx4f(x) = What theorem did you use to
5 answers
455 views
evaluate the limit
as lim goes to -1 (x^2 +2x +1)/ (x^4 -1) the answer is zero but i don't know how to get it
1 answer
450 views
evaluate the limit
as lim h goes to 0 ((2+h)^3 - 8)/h the answer is twelve but I don't know how to factor out the cube
1 answer
348 views
how do you factor our a cube?
x^3 +8
3 answers
292 views
In the theory of relativity, the mass of a particle with velocity v is
m=mo/(square root ((1- v^ 2)/ c^2)) where mo is the mass
3 answers
1,164 views
I don't know how
y-1=-1/3(x-3) is simplifes to x+3y-6=0
1 answer
288 views
how do you find the derivative of square root of x
1 answer
288 views
how does
secx(tanx + tan^2x- sec^2x) simplified to sec x (tanx -1)?
2 answers
948 views
how do you find sin7x/4x when lim x goes to 0
the answer is 7/4
3 answers
747 views
how do you find the derivative of
square root of 5 /t^5
4 answers
371 views
If f(x)=(x^2+3x+4)^2
how do you find the derivative I tried doing 2 (2x+3)..
1 answer
331 views
If a ball is thrown vertically upward from the roof of 32 foot building with a velocity of 80 ft/sec, its height after t seconds
2 answers
688 views
what is the derivative of
f(x)=6sin2x I put 12cosx...
1 answer
330 views
How do you find the derivative of square root of five /t^5?
how do you find the derivative of square root of five /t^5 I know
1 answer
450 views
Consider the function
f(x)=–3x3–1x2+1x+1Find the average slope of this function on the interval (–2–1). By the Mean Value
2 answers
617 views
f(x)=8x^3+1x^2–8x+2/–7x^2–4x+9
Find the equation of the non-vertical asymptote. y = Does f(x) intersect its non-vertical
1 answer
458 views
find the derivative y= csc^-1 (secx)
0 less than or equal to x less than or equal to 2¤Ð what did i do wrong? - 1/ secx
3 answers
818 views
find all values of x for which function is differentiable.
y=lnx^2 why is the answer= for all x doesn't equal 0?
4 answers
878 views
A ball is thrown into the air with an upward velocity of 28 ft/s. Its height (h) in feet after t seconds is given by the
5 answers
5,054 views
The decomposition reaction, x-->products, is second-order with rate constant k=0.0183 L/(s)(mol).
How long will it take for the
2 answers
788 views
According to the mechanism below, what is the correct expression for the rate consumption of A?
In the mechanism, M is a molecule
1 answer
363 views
A reaction has a first order rate constant of (6.25x10^-5 1/s) at T=298.15K and (0.0000538 1/s) at T=338.15K.
What is the value
1 answer
366 views
The activation energy, Ea, for a zeroth-order reaction, X-->products, is most readily obtained from the slope of a plot of:
2 answers
596 views
I'm working on substitution organic chemistry problems and I just had a question.
There's an equation in which a molecule is
1 answer
461 views
Draw a picture that represents 3x50=150?
7 answers
1,437 views
Suppose that 20 workers were required in 2010 to produce 120,000 bushels of wheat on a 1,000-acre farm.
a. What is the average
1 answer
695 views
According to the CDC, 25 % of college students get the flu every year.
(a) If 7 college students are selected at random? What is
3 answers
518 views
Two tourists went on a hike at dawn. One went from a to b and another one went from b to a. They met at noon but did not stop
1 answer
439 views
Is "words are eaten" personification?
4 answers
339 views
I need to write a real life word problem for X + 13 = -34
4 answers
345 views
Evaluate the expression (3²)²+ 1
1 answer
391 views
Hey i was wondering if you guys can help me with a question.
Which of the following choices is true about models used in science?
1 answer
369 views
A state used to have a flat tax rate on individual income taxes. Recently the state implemented a progressive tax structured on
1 answer
436 views