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Questions (66)
Our mobile phase should be prepared in a mixture that has a ratio of 4:1:1 of 2-propanol:acetic acid:water.
Calculate the volume
1 answer
17 views
The following solutions are combined:
20 mL of 0.50 M TRIS buffer, pH 7.0 10 mL of 0.25 M KCl 90 mL of 0.30 M sucrose 150 mL dH2O
1 answer
18 views
Calculate the molar concentration of a riboflavin (376.37 g/mol) solution made from (1.1x10^2) mg dissolved up to (6.500x10^2)
1 answer
13 views
A patient is suspected of having low stomach acid, a condition known as hypochloridia. To determine whether the patient has this
1 answer
93 views
A patient is suspected of having low stomach acid, a condition known as hypochloridia. To determine whether the patient has this
1 answer
99 views
A buffer solution is composed of 1.00 mol of acid and 3.25 mol of the conjugate base. If the pKa of the acid is 5.00, what is
1 answer
51 views
write either for or against the topic a single sex school is better than a mixed school
1 answer
502 views
Use define integrals to calculate the area under the graph of y=tanx between x=a to x=b. (hint: write tangent in the form of
4 answers
471 views
twice the product of 3 and -2 added to the product of -7 and 5
1 answer
336 views
The Information Systems Audit and Control Association surveyed office workers to learn about the anticipated usage of office
0 answers
780 views
Chocolate Box Company is going to make open-topped boxes out of 7 × 11-inch rectangles of cardboard by cutting squares out of
4 answers
1,567 views
In a class, 4/5 of the girls have brown hair. Of the brown-haired girls, 3/4 of the have long hair. Of the girls with long brown
1 answer
617 views
Oxygen gas and aqueous benzoic acid react to form carbon dioxide gas and water gas. Determine the mass of water in grams if
1 answer
879 views
75=m/3+10
1 answer
265 views
The specific heat of iron is 0.498 J/g °C. If 341 J of heat is added to 154.1 g of iron at 25.0 °C, what is the new
1 answer
577 views
A block of metal is 6.88 cm long, 2.03 cm wide, and 1.85 cm high. It has a mass of 215.1 grams. What is the density of this
1 answer
445 views
a 1.0 kg metal head of a geology hammer strikes a solid rock with a speed of 3.9 m/s. assuming all the energy was retained by
2 answers
696 views
Please help!!!!
Explain how mutations in DNA may affect the traits of an individual
3 answers
608 views
Is CO2 a product of an acid/base reaction?
1 answer
435 views
Explain how to factor 5x^2 - 125.
1 answer
939 views
How do you unscramble o'ceisoubellreld.
0 answers
468 views
Write an explicit formula for the sequence one-half, three-sevenths, one-third, five-nineteenths, three-fourteenths, ... Then
2 answers
536 views
Generate the first five terms in the sequence using the explicit formula.
cn= 12n – 11 (1 point)
59 answers
16,034 views
A boy sledding down a hill accelerates at 1.20 m/s2. If he started from rest, in what distance would he reach a speed of 6.10
1 answer
523 views
You are explaining to a friend why the crew of the International Space Station feels weightless
while orbiting the Earth. Your
0 answers
664 views
Write the equation of the quadratic function with roots -2 and 4 and a vertex at (1, 9).
1 answer
703 views
I have a blank table to fill in.It says divide m by 3 m÷3
1 answer
331 views
A woman that is 5'4" stands 15 ft from a streetlight and casts a four-foot long shadow. Determine the height of the streetlight
0 answers
514 views
What is the molarity of a solution if 255g NaNO3 is dissolved in 1500 mL of solution
1 answer
357 views
h worked the following problem incorrectly.
Part 1) In which line was the mistake made? Part 2) Show your work and give the
0 answers
611 views
Jan ate 1/8 of a pizza. Then she ate 1/3 of the pizza. Later she ate 1/4 of it. How much did she eat in all?
Thank you!
3 answers
1,024 views
Find a fraction equivalent to 1\2. The denominator must be 5 less than 3 times its numerator. The numerator is less than 8. Is
1 answer
1,306 views
What type of graph is best suited for displaying the range and frequency distribution of the number of hours the students in a
0 answers
543 views
Calculate (in MeV ) the binding energy per nucleon for 40 Ca .
1 answer
528 views
Part C
Calculate (in MeV ) the total binding energy for 40 Ca .
0 answers
444 views
What is the energy (in eV ) of a photon of visible light that has a wavelength of 500 nm ?
0 answers
455 views
Zinc has a work function of 4.30 ev .
A 4.50eV photon strikes the surface and an electron is emitted. What is the maximum
1 answer
1,097 views
A spherical virus has a diameter of 50mm .
It is contained inside a long, narrow cell of length . What uncertainty does this
1 answer
678 views
The speed of an electron is known to be between 3.0×10^6 m/s and 3.3×10^6 m/s . Estimate the uncertainty in its position.
1 answer
586 views
The speed of an electron is known to be between 3.0×10^6 m/s and 3.3×10^6 m/s . Estimate the uncertainty in its position.
1 answer
1,120 views
brad wants to buy flowers for his friend with 27 $ . the daises are $1 each and the roses are $3 each. he buys 3 more daises
1 answer
511 views
Can someone help me with this question please?
What is the pH at each of the points in the titration of 25.00 mL of 0.1000 MHCl
1 answer
807 views
A 65 g meter stick has two masses, each 250 g placed upon it. The first is located at 72 cm and the second located at 41 cm.
1 answer
492 views
A 984 kg car is driving along a boardwalk. The car's center of mass is 33 cm in front of the rear wheels, and the distance
1 answer
579 views
You are riding a bicycle at a speed of 15 m/s. The bycicle has tires with diameters measuring 630 mm. You can approximate each
1 answer
477 views
When throwing a ball, a pitcher exerts a torque of 150 N m for 0.15 seconds onto their arm before letting go of the ball. With
2 answers
448 views
What are 10 numbers that have a median of 21, a range of 20, and a mode of 10?
2 answers
365 views
How do I find a the surface area of a can that has a diameter of 4 inches and a height of 3 inches?
1 answer
373 views
If AC = 20 centimeters, and BC = 16 centimeters, what does AB equal?
4 answers
586 views
how do i do cosecant x= 30/150?
and how do i do cosecant x= 1500/9000
1 answer
436 views
what is the antonym of the word smooth
3 answers
233 views
graph each realation on cordanant system
1 answer
338 views
If you shout across a canyon and hear an echo 3.6 s later, how wide is the canyon?
2 answers
1,560 views
if a super dense material with a refractive index of 1.76 x10^7 what is the speed of light in this material
2 answers
1,905 views
Mathematically, why is a manhole cover round?
1 answer
316 views
if u cut any size circle 5times , what is the greatest amount of pieces i can get?
2 answers
742 views
hi, i am in forth grade i need to know what factors means. now for my home work. can you please respond and in a way i can under
1 answer
474 views
why are the processes of transcription necessary for life?
1 answer
387 views
why are the processes of transcription necessary for life?
0 answers
348 views
what relation is a doorstep to a doormat
2 answers
876 views
what would be a factor of a cell that leads to mitosis? 4 letters. starts with s, ends in e
1 answer
487 views
what is a structure that holds each chromosome to its exact copy? it begins with a "C", and has "d" as the second to last
1 answer
571 views
10 people are going canoeing/tubing. some people will tube, some will canoe. tubes are $7 each. canoes are $11 each. tubes hold
2 answers
444 views
10 people are going canoeing/tubing. some people will tube, some will canoe. tubes are $7 each. canoes are $11 each. tubes hold
1 answer
511 views
How do i find cos[arctan(3/5)] ?
3 answers
373 views
my 9 year old daughter is learning about the caribbean on what i don't know please could any one help with any info on the
0 answers
616 views