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Questions (405)
I asked this before, but got no response.
A) If you make up a solution of 250 mL of 0.1 M TRIS in the acid form, what will be the
1 answer
342 views
I have already posted this and never got a response, please help.
here is my data from lab: Buffer1: HPO4- weight 3.412g;
1 answer
728 views
Buffer question:
If I add 3 mL of 1 M NaOH to a buffered solution, will I still have a valid buffer?
5 answers
4,355 views
a large vertical rectangular plate of glass is to be inserted in the wall of an aquarium underwater so visitors can see into th
1 answer
490 views
1. a large vertical rectangular plate of glass is to be inserted in the wall of an aquarium underwater so visitors can see into
2 answers
488 views
1. a large vertical rectangular plate of glass is to be inserted in the wall of an aquarium underwater so visitors can see into
1 answer
489 views
Can someone please help me with the following question. I am not sure even where to start.
A 5-year annuity of 10 $9,000
2 answers
737 views
what is a nanotube?
1 answer
252 views
i want to make sure i am answering this correctly.
1) the primary source of energy for ocean currents and waves is: the sun 2)as
3 answers
1,158 views
i am lost in the steps i am working with binomial theorem to expand the expression.
Finding the three first terms in the
3 answers
455 views
i need help in this one for the steps.
find the therm that does not contain x in the expansion of ((8x) + ((1)/(2x))^8
3 answers
352 views
i need explanation how they solved this one the answer is provided:
finding the number o fdistinguishable permutations.
4 answers
357 views
i have to search for a recent ocenaographic event to write a book report on has to be on the internet what is agood website or
2 answers
526 views
The arch of a bridge is a semi ellipse, the span is thirty feet and the top of the arch is ten feet above the major axis. the
4 answers
952 views
i have a tritation lab due tomorrow and i am stumped on a couple things.
its a titration lab using sodium hydroxide (NaOH)- 250
13 answers
2,728 views
Hello,
Where can I find more information about Aaron the moor in "Titus Andronicus" by Shakespeare? Prompt: As Tamara's star
3 answers
541 views
Two molecules of DNA are the same size, but differ in base composition. One molecule contains 20 % (A + T) while the other
1 answer
391 views
The length of DNA HELIX occupied by one nucleotide pair is 3.4 angstroms. What is the length in angstroms of this unknown DNA
1 answer
746 views
soo for physics, we did a lab where we launched a cart on a track on the floor and recorded time, distance, etc. to figure out
4 answers
1,864 views
Explain whether the set {0, 1, 2} is closed with respect to addition on whole numbers.
1 answer
480 views
Simplify each of the following, if possible. Write your answers in the exponential form ab.
(a) 24 • 25 • 28 (b) 34 + 2 •
1 answer
480 views
The ratio of boys to girls in Mr. Joiner’s class is 5 to 7. If there are 15 boys in the class, how many total students are in
4 answers
553 views
Sheryl correctly answered 85% of the questions on her 200-question biology final.
Fernando scored a 90% on his 180-question
2 answers
804 views
Nitrogen and hydrogen react to form ammonia. Consider the mixture of N2 and H2 in a closed container.
In this container there are
3 answers
931 views
In which cases are higher-energy photons released, with Li+ or Cu2+? How do you know?
3 answers
771 views
Why is the light from an incandescent light bulb white?
1 answer
385 views
why are the orbitals of the hydrogen atom described as probability maps? Why are the edges of the hydrogen orbitals sometimes
3 answers
1,622 views
I need this sentence to be separated into a gerund phrase "jumping out of airplanes sounds scary to me." Please help
1 answer
427 views
Why do the metallic elements of a given period (horizontal row) typically have much lower ionization energies than do the
3 answers
1,213 views
A rotating water pump works by taking water in at one side of a rotating wheel, and expelling it from the other side. If a pump
1 answer
604 views
A boy carries a sack on one end of a very light stick that is balanced on his shoulder, at an angle of 22.0 degrees up from the
1 answer
423 views
an asteroid orbits the sun at a constant distance of 4.44e+11 meters, the suns mass is 1.00*10^30kg, what is the orbital speed
3 answers
479 views
I keep getting these questions wrong, could someone please help.
Thanks so much. Question 1 For the following overall reaction,
4 answers
1,401 views
Which of the following is considered a Lewis acid or a Lewis base.
I- H2O BCl3 NH3 OH- H+ CO2 SO2
5 answers
2,130 views
Let Q be an acute angle such that sinQ=.6. Find the values of the following using Trig Identities: cosQ and tanQ
5 answers
501 views
Calculate the amplitude, period, phase shifts, and 5 points for y=2-sin(2piex/3)
2 answers
1,064 views
Tarzan, who weighs 780 N, swings from a cliff at the end of a 12.0 m vine that hangs from a high tree limb and initially makes
2 answers
560 views
A worker pushed a 34.0-kg block 10.0 m along a level floor at a constant speed with a force directed 39.0° below the
1 answer
395 views
Evolutionary theories often emphasize that humans have adapted to their physical
environment. One such theory hypothesizes that
1 answer
871 views
Evolutionary theories often emphasize that humans have adapted to their physical
environment. One such theory hypothesizes that
1 answer
398 views
A 1220 N uniform beam is attached to a vertical wall at one end and is supported by a cable at the other end. A W = 1990 N crate
4 answers
1,345 views
A 1240 N uniform beam is attached to a vertical wall at one end and is supported by a cable at the other end. A W = 1970 N crate
2 answers
576 views
Two thin rectangular sheets (0.15 m 0.50 m) are identical. In the first sheet the axis of rotation lies along the 0.15 m side,
4 answers
574 views
A venturi meter is a device for measuring the speed of a fluid within a pipe. The drawing shows a gas flowing at a speed v2
1 answer
1,043 views
A cylindrical air duct in an air conditioning system has a length of 3.5 m and a radius of 5.00 m. A fan forces air (ç = 1.8
2 answers
602 views
The pole vault landing pad at an Olympic competition contains what is essentially a bag of air that compresses from its
4 answers
649 views
The pole vault landing pad at an Olympic competition contains what is essentially a bag of air that compresses from its
3 answers
407 views
The pole vault landing pad at an Olympic competition contains what is essentially a bag of air that compresses from its
3 answers
420 views
Find the sum of the first six terms of the geometric series 81 -27 +9 -...
how do you work it??
5 answers
2,942 views
Find A1 in a geometric series for which Sn=210, r=-2, and n=6?
Can someone lead me in the right direction?
6 answers
2,103 views
i understand that in the EAT thereom the sum of the inside angles equal to the outside angle.. in my homework i have to find the
1 answer
355 views
The 20 errors are in the following categories: comma usage (six errors); question marks, apostrophes, and quotation marks (five
9 answers
564 views
I think I found all the errors. What do you think?
6 answers
354 views
I believe I have found all the mistakes. What do you think?
Identify Twenty Errors in the Passage Below Review the passage below,
4 answers
598 views
why are guys given less of a chance then strate guys in a goverment court.
7 answers
476 views
A rock is thrown vertically upward with a speed of 14.0 m/s from the roof of a building that is 50.0 m above the ground. Assume
4 answers
7,419 views
a fireman D=50 m away from a burning building directs a stream of water from a ground-level fire hose at an angle of 30 degrees
4 answers
1,293 views
how many inches are in cenimeters 25 ceinmeters = ? inchs
3 answers
315 views
Please help me solve these problems.
12^2+2 [(13+3)] / 2^2] -4(3)+5[7-6(-4)^2] -5(3)+3[9-6(-3)^2]
1 answer
342 views
im doing a paper on anceiant agriculture i have wtiiten the paper but i need an into sentence just a good first sentencee
4 answers
311 views
The first right given to every American citizen at birth is the right to freedom of speech and religion. Therefore, anyone would
4 answers
633 views
Religion plays a big part in people's daily life. The Christian and Catholic religion beliefs going to conformation, regular
2 answers
543 views
These four religions have some similarities but are very different in their beliefs and their cultural differences to society.
2 answers
646 views
A 175-N box is placed on an inclined plane that makes a 30.0° angle with the horizontal. Find the component of the weight force
3 answers
440 views
Find the formula for the compound that contains 72.4% iron and 27.6% oxygen.
4 answers
3,344 views
What mass of water must be added to 0.5 mol of glucose to make a solution of 25 percent by mass?The molar mass of glucose is 180
4 answers
2,411 views
Calculate the number of moles of each ion in 10.5 mL of 0.205 M cadmium phosphate solution.
1 answer
444 views
You react chemical A with chemical B to make one product. It takes 100 grams of chemical A to react completely with 20 grams of
4 answers
2,432 views
Find the interval (or intervals) on which the given expression is defined:
(x^2-7x+12)^(1/2)
5 answers
742 views
All of the following statements regarding the Monroe Doctrine are correct EXCEPT?
A. Issued by Monroe in response to an onslaught
4 answers
2,767 views
outline the role team work or team building can play in the business planning process?
1 answer
331 views
Consider the following reaction:
Find the equilibrium partial pressures of A and B for each of the following different values of
5 answers
1,468 views
NH4HS<-->NH3+H2S
What is the minimum mass of NH4HS that must be added to the 5.00-L flask when charged with the 0.300g of pure
7 answers
2,523 views
A certain first order reaction has a rate constant of 3.75x10^-2 s^-1 at 25.0C. What is the value of k at 70.0C when the
2 answers
704 views
The minister sent to Mexico in 1845 had strict orders to accomplish what as his primary goal?
A. Secure Mexican approval of the
3 answers
1,124 views
no question - just thank you "drbob", you've answered a few of my questions.
1 answer
389 views
The point P(4, −2)lies on the curve y = 2/(3 − x).
(a) If Q is the point(x, 2/(3 − x)),use your calculator to find the
6 answers
20,451 views
Potassium nitrate has a lattice energy of -163.8 kcal/mol and a heat of hydration of -155.5 kcal/mol.
How much potassium nitrate
4 answers
2,557 views
X^2 * x+15
X^2+7 x
1 answer
264 views
X^2 x+15
----- * ------ = X^2+7 x
1 answer
244 views
(a) Cadmium telluride (CdTe) is a semiconductor witha band gap, Eg, of 1.45 eV. Calculate the value of the absorption edge of
1 answer
419 views
A latex balloon, wall thickness 3.091 x 10-4 m, contains helium at a concentration of 0.5 kg m-3. Under these conditions the
5 answers
931 views
The diffusion coefficient of silver (Ag) in copper (Cu) has the following values:
T (K) D (m2s-1) 923 5.42 x 10-16 1173 1.34 x
5 answers
652 views
A latex balloon, wall thickness 3.091 x 10-4 m, contains helium at a concentration of 0.5 kg m-3. Under these conditions the
3 answers
427 views
You wish to increase the carbon content of a slab of steel by exposing it to a carburizing atmosphere at elevated temperature.
1 answer
416 views
A latex balloon, wall thickness 3.091 x 10-4 m, contains helium at a concentration of 0.35 kg m-3. Under these conditions the
4 answers
446 views
Chemical analysis of a silicon crystal reveals gallium at a level of 3.091×10−8 atomic percent. Assuming that the
10 answers
921 views
the length of a rectangular photograph is 5in. more than the width. If the area is 50 in^2 what are the dimensions of the
1 answer
402 views
5 radical 5 and 9 radical 5 ____like radicals.
a. are b. are not
1 answer
313 views
the airline cost for x thousand passengers to travel round trip from nyc to atlanta is given by C(x)= radical 0.3x+1
where C(x)
2 answers
540 views
the airline cost for x thousand passengers to travel round trip from nyc to atlanta is given by C(x)= radical 0.3x+1
where C(x)
3 answers
568 views
use the pythagorean theorem to find b when a=14 and c=y
(triangle) b=
1 answer
329 views
Factor the given expression. Then use the zero product rule and the quadratic formula to solve the problem. There should be
1 answer
444 views
Factor the given expression. Then use the zero product rule and the quadratic formula to solve the problem. There should be
1 answer
415 views
Factor the given expression. Then use the zero product rule and the quadratic formula to solve the problem. There should be
1 answer
366 views
Factor the given expression. Then use the zero product rule and the quadratic formula to solve the problem. There should be
1 answer
365 views
Factor the given expression. Then use the zero product rule and the quadratic formula to solve the problem. There should be
1 answer
371 views
solve the equation
log (4x)= log5 + log(x-4)
1 answer
394 views
solve the equation
log2(3x-2) - log2 (x-5)=4
2 answers
1,231 views
find the domain of the function
1) f(x)= log2( 49-x^2) 2) f(x)=In [1/x+5]
1 answer
428 views
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