Homework answers and tutorials

Waiting for answer HIll buffer is a solution of 0.4 M K2HPO4, made up in .08M K...
Yes, your calculations are correct. You can use the of the solution to determine how many moles of dipotassium phosphate you'd get in 500 mL , then multiply that value by the molar mass of the compound ##C = n/V = n = C * V## ##n_(K_2HPO_4) = 0.4"moles"/cancel("L") * 500 * 10^(3)cancel("L") =...
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Waiting for answer What is Sputnik?
Satellite. Sputnik was the very first satellite to orbit the earth. Launched in October 4, 1957 by the Soviet Union. It marked the beginning of the space age
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Waiting for answer What is the function of ATP?
Adenosine triphosphate (ATP) transports chemical energy within cells for metabolism. Adenosine triphosphate (ATP) is thought of as the "molecular currency" for energy transfer with...
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Waiting for answer How do solutes affect the boiling point?
Solutes raise the boiling point of a solution. When a is added to a solution, the solutes create the addition of that interact with the in such a way that more energy is required to evaporate the solvent. Let's use salt water for example. Na+ and Cl atoms are constantly forming bonds with e...
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Waiting for answer What are the properties of a rhombus?
properties are enumerated below: Any rhombus has the following properties: Opposite angles of a rhombus have equal measure. The two diagonals of a rhombus are perpendicular;...
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Waiting for answer What is the lateral area of a cylinder if the height ##h## i...
Lateral area is ##72pi## square centimeters. As volume is ##pir^2h##, where ##r## is radius and ##h## is height, ##36pi=pir^2xx9## or ##36pi=9pir^2## Hence ##r^2=(36pi)/(9pi)=4## o...
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Waiting for answer What is the chemical formula of baking soda?
Baking soda is largely ##NaHCO_3##; some other salts are present. See
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Waiting for answer How do you find the derivative of ##y=sin2x2sinx##?
By taking the derivative of both sides, you get: ##y' = 2cos2x  2cosx## To understand this, you must know for starters, the derivative of the basic trigonometric functions. ##dy/dx sinx = cosx## ##dy/dx cosx = sinx## If x happens to be a function (in your case 2x), then you must multiply it by...
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Waiting for answer What are the sequence of events in cellular respiration?
In aerobic cellular respiration, first we have glycolysis, the citric acid cycle, and finally oxidative phosphorylation. Aerobic cellular respiration can be broken down into three ma...
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Waiting for answer In SDSPAGE, the dye front runs off the bottom of the gel....
Nothing happens to the gel. The proteins simply move through the channels in the gel. The dye is chosen to run off before any of the proteins. That's how you know when to stop the...
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Waiting for answer Why is the cell theory important?
Cell theory is that to biology as Dalton's atomic theory is to chemistry. As in Dalton's Atomic Theory, we have the atoms as the fundamental unit of a matter and matriculate system, we have the cells as the fundamental and structural unit of the living organisms.[Living organisms can be compared to...
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Waiting for answer A triangular sail has a perimeter of 25 m. Side a is 2 m sho...
A is 10, B is 6, and C is 9. Our solution centers around the length of side B, as once you have that value, you can solve for A and B very easily. Let's develop equations for what w...
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Waiting for answer What does a declarative sentence always end in?
. (period) From the word declarative, a declarative sentence is a declaration . It is a statement  e.g. "A declarative sentence always ends in a period." It is not a question (?) no...
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Waiting for answer What was the purpose of the Gallipoli campaign?
The Allies wanted capture the Dardanelles and then Istanbul. By opening up a supply route to Russia they could positively affect the Eastern Front against the Germans and knock the...
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Waiting for answer What is the formula weight of silver chromate ##(Ag_2CrO_4)#...
The formula weight for ##"Ag"_2"CrO"_4"## is ##"331.728 u"##. In order to determine the formula weight of a compound, multiply the atomic weight on of each element by its subscript...
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Waiting for answer What is the difference between 's and s' in plural possess...
see below The 's is added to form the possessive of plural not ending in "s". Ex: children 's toys men 's work For plural nouns already ending in "s", there is no more need...
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Waiting for answer How do you find slope and yintercept of ##y=6##?
The is 0 and the y intercept is 6. Slope intercept form is ##y=mx+b## . The ##y=## in slope intercept form is really the ##y##intercept and ##b## can confuse you when you don't...
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Waiting for answer What are nucleotides?
A nucleotide is a monomer (subunit) of a nucleic acid. The genetic information of a cell is stored in molecules of deoxyribonucleic acid (DNA). DNA is a polymer of nucleotides , th...
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Waiting for answer What is the chemical formula for iron(II) hydroxide?
##Fe(OH)_2## Hydroxides are poorly characterized beasts. The solid state structure might be ##FeO*H_2O##, which is equivalent to ##Fe(OH)_2##.
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Waiting for answer The surface area of an entire cube is 96 square cm If the le...
The surface area of a cube is given by ##S.A = 6s^2##, where ##s## is the side length. ##96= 6s^2## ##16 = s^2## ##s = 4## Therefore, one side measures ##4## cm. Hopefully this helps!
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