Homework answers and tutorials

Waiting for answer Can anyone explain me the amphoteric nature of water?
An amphoteric compound is a compound that can act either as an , or as a in a chemical reaction. A first example of water's amphoteric character is the fact that it can selfionize to a small extent. What that means is that a water molecule is capable of donating one of its protons (##"H"^(+)##)...
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Waiting for answer What does accommodation mean?
Accommodation is the process of modifying one's schema to accommodate new information. To explain accommodation, we must first define schemas. Proposed by Jean Piaget, schemas are ou...
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Waiting for answer What is the unit for the index of refraction?
There are no units for the index of refraction, because it is merely a ratio. When you use the formula ##n = c/v##, the units for c and v cancel each other out, because they are both measured in m/s, leaving no units.
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Waiting for answer What's the difference between the formula of acetate and eth...
There is no difference. Acetate is the older, preIUPAC name, whereas "ethanoate" is the systematic IUPAC type name for the species. Therefore the well known ester product is referr...
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Waiting for answer What is tbutyl chloride?
##(H_3C)_3CCl## This is a volatile liquid, which you will find on the shelves of most laboratories. When you open the bottle you will be able to perceive its flavour.
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Waiting for answer The Empire State Building has a height of 1250 ft. What is...
##1*m=1.0936## ##"yards"##. ##"Height"## ##=## ##1250*ftxx1/3xx"yards"*ft^1xx1.0936*m*"yard"^1## ##=??m## This site reports that the height of the Empire State is ##1454*ft##....
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Waiting for answer PbI2 is: PbI2(s) ⇌ Pb2+(aq) + 2I–(aq) At a particular...
Your answer is in the question; that is, if you have transcribed the question correctly. ##PbI_2(s) rightleftharpoons Pb^(2+) + 2I^## You have been quoted the concentration of plum...
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Waiting for answer Calculate the molar concentration of 63.0 g of MgBr2 in 150....
is the number of moles of per liter of solution. Calculate the no.of moles of MgBr2 by dividing 63.0 g by the Molar mass of MgBr2. ( Molar mass of MgBr2=Molar mass or in g of Mg + 2 x MM or atomic mass in g of Br) Divide the number of moles of MgBr2 ( the result in step 1) by 0.15 L(volume of s...
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Waiting for answer How do you find ##(dy)/(dx)## given ##x^2+y^2=1##?
## dy/dx=x/y ## ##x^2+y^2=1## Differentiate wrt ##x##: ## d/dxx^2+d/dxy^2=d/dx1 ## We already know how to deal with the first and third terms, so lets get them out the way: ## d/...
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Waiting for answer What is Pressure?
is the force acting on an unit area , It can be given as a formula, it's . ##F## = Net force acting on the body . ##A##= Area which is force is exerted. . Pressure is acting on all three states. Solid. Liquid. Gas. Below image states how area is affect for prssure,
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Waiting for answer What is the condensed structural formula for 2, 2dimethylbu...
You can learn how to draw a condensed structural formula . 2,2Dimethylbutane has a fourcarbon chain with two methyl groups on C2. The condensed structural formula is CH₃C(CH₃)₂CH₂CH₃. Note that the two CH₃ groups are enclosed in parentheses after the carbon atom to which they are attached.
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Waiting for answer How do you calculate electrochemical cell potential?
Warning! VERY long answer! You can calculate the cell potential for an electrochemical cell from the halfreactions and the operating conditions. The first step is to determine the...
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Waiting for answer What are examples of metonymy?
Define: StandIns for Other Words Crown  in place of a royal person The White House  in place of the President or others who work there Read more at http://examples.yourdictionary...
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Waiting for answer Which of the following words has a positive connotation: Odo...
The word aroma has positive connotation. These words have different connotations. Word smell is neutral, Words odor and stench are describing unpleasant smell so they are ne...
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Waiting for answer What is the best human anatomy and physiology book?
This is contentious. There are several. Gray's anatomy is wonderful for most of the gross anatomy in situ. However there are a few supplemental books which give more oversight to cer...
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Waiting for answer How many cubic feet are in a cubic yard?
one cubic yard is ##27## cubic feet As there are ##3## feet in a yard, one cubic yard will have ##3xx3xx3=27## cubic feet
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Waiting for answer How do you write 7 × 7 ×7 ×7 ×7 in exponential form?
##7^5## A short hand method of writing repeated multiplication of a number is to express it in ##color(blue)"exponent form"## For example. ##2xx2 = 2^2" the "color(blue)(2) " in "...
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Waiting for answer How do you simplify ##cos 2x = (1tan^2x)/(1+tan^2x)##?
##Cos2x## = ##Cos2x## ##Cos2x## = ##(1  tan^2x)/(1+tan^2x)## ##Cos2x## = ##(1  tan^2x)/(Sec^2x)## ##Cos2x## = ##(1  tan^2x)/(1/Cos^2x)## ##Cos2x## = ##(1  sin^2x/Cos^2x)*(Cos^...
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Waiting for answer A test consists of 910 true or false questions. If the stude...
##sqrt{910 * 0.5 * 0.5}=sqrt{227.5} approx 15.08##. The number ##X## of correct guesses in ##n=910## trials is a binomial random variable with probability ##p=0.5## of success. The...
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Waiting for answer How are photosynthesis and cellular respiration connected?
The products of are the reactants of cellular respiration, and the products of cellular respiration are the reactants of photosynthesis. The chemical equation of photosynthesis is:...
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