Homework answers and tutorials

Waiting for answer Why does electronegativity increase as atomic radius decreas...
When atomic radius decreases, electrons are closer to the nucleus, which means that the attraction that atom has on the orbiting electrons increases, and therefore the electronegativity increases....
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Waiting for answer What is the difference between primary, secondary and tertia...
The alcohol contains functional group OH. You have to check for the hydroxy carbon i.e. the carbon to which this OH is bonded to. If the hydroxy carbon is bonded to only one carbon, then it is called as primary alcohol. Eg. ##CH_3CH_2OH## If the hydroxy carbon is bonded to two carbons, then it...
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Waiting for answer What is a contraction?
A words or group of words resulting from combining or eliding an earlier form. A contraction is a words or group of words resulting from combining or eliding an earlier form. Some e...
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Waiting for answer What is ##abs(9)##?
##abs(9) = 9## If ##x 0## then ##abs(x) = x 0## If ##x = 0## then ##abs(x) = 0## If ##x 0## then ##abs(x) = x 0## For all ##x## we have ##abs(x) = 0## ##abs(x)## is th...
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Waiting for answer How do you simplify the expression using a double angle form...
Remember that ##cos2theta=12sin^2theta##. Hence ##12sin^2(2x)=cos4x##
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Waiting for answer How many cheese doodles are in .5 moles of cheese doodles?
A lot! ##3.01 xx 10^23## 1 mole of anything contains ##6.02 xx 10^23## parts of that anything, so half mole of doodles will be ##3.01 xx 10^23## of those doodles.
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Waiting for answer What causes boiling point elevation and freezing point depre...
Presence of particles in the solution. Boiling point elevation and freezing point depression are affected by the presence of solute particles with the . Note that the increase in...
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Waiting for answer Which gland produces ADH?
Anti diuretic hormone/ADH is released in blood stream by posterior pituitary though it is produced by hypothalamic neurons. (https://d2gne97vdumgn3.cloudfront.net/api/file/fMldOFdaS...
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Waiting for answer How would you describe the angles and sides of an acute, iso...
An isosceles must have ##2## equal side lengths and ##2## equal angles only. An isosceles triangle looks something like: Any isosceles triangle has two equal sides, which are both...
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Waiting for answer What are some examples of organisms in the phylum mollusca?
Cornu aspersum (formerly Helix aspersa)  a common land snail Sepia officinalis
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Waiting for answer How do you calculate opportunity costs?
Opportunity cost is your next best option in a choice you make.
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Waiting for answer Where is the Moon in its orbit at the time of a solar eclips...
Moon is in between Sun and Earth. SOlar eclipse happens on new moon day.The moon will be in between Sun and Earth in straight line Picture credit sciency blogspot.com .
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Waiting for answer What is,dark matter made of?
Dark matter aren't made up of Baryons, while regular matter is made up of those. So we don't exactly know what dark matter is made up of, we categorize dark matter by the fact that they are not directly observable and are not made up of Baryons.
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Waiting for answer Why is the mole an important unit to chemists?
is important because it allows chemists to work with the subatomic world with macro world units and amounts. Atoms, molecules and formula units are very small and very difficult to work with usually. However, the mole allows a chemist to work with amounts large enough to use. A mole of something...
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Waiting for answer How do you graph ##ln(abs(x))##?
The typical graph of just ##ln(x)## is graph{ln(x) [10, 10, 5, 5]} Notice the restriction. In ##ln(x)##, ##x 0##. That is, negative numbers are not in the domain of a logarithmic function. However, in ##ln(abs(x))##, negative numbers are made positive. For example, both ##e^2## and ##e^2##,...
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Waiting for answer How do you graph the direct variation equation ##y=5/2x##?
To graph the ##y=5/2x##, determine two points on the line. If ##x=0, y=(5/2*0)=0## Point = ##(0,0)## If ##x=2, y=(5/cancel 2*cancel 2/1)=5## Point = ##(2,5)## Plot the two points and draw a straight line through the points. graph{y=5/2x [7.605, 12.395, 3.345, 6.655]}r
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Waiting for answer A dollar bill is 15.6 cm long. If 200 dollar bills were laid...
31.2 m First, you would multiply 15.6 by 200 because you have 200 dollar bills that are each 15.6cm long. The resulting length is 3,120 cm. Now, you have to convert cm to meters beca...
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Waiting for answer What are linkage isomers? Give me an example
Linkage isomers are coordination compounds that have the same composition but differ in the connectivity of the ligand to the metal. For example, a thiocyanato group could be connected to the metal atom by either the S atom or the N atom. Typical ligands that give rise to linkage isomers are: th...
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Waiting for answer How do you derive the area formula of a rhombus?
##D * d## ABCE. the diagonals AC and BE are perpendicular. Area of ##Delta ABC = 1/2 * D * d = ## Area of ##Delta AEC## Just sum both. Area of ##ABCE = (1/2 + 1/2) D * d##
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Waiting for answer How do you simplify ##sqrt((1/18))##?
##sqrt(2)/6## It is a matter of splitting the numbers up into factors that have a root if you can. Then taking these outside of the root by applying that root. What factors are th...
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