Homework answers and tutorials

Waiting for answer How do you find the area of a parallelogram without the heig...
Without using the height, you can use trigonometry ... Area of a parallelogram ##=(ab)sin(C)## Where a and b are the lengths of the sides and C is the included angle. Using the exa...
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Waiting for answer What is the empirical formula of H2O2?
The empirical formula for the molecular formula ##"H"_2"O"_2"## is ##"HO"##. The empirical formula of a compound is the lowest whole number ratio of in the compound. This ratio beco...
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Waiting for answer What is the overall charge of the electron cloud of an atom?...
Well, what is the , ##Z##, of the given element? A given element has an atomic number of ##Z##. What does this mean? It means that there are ##Z## positive nuclear charges, and thi...
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Waiting for answer What are some examples of properties of solids?
Solid is one of the three main states of matter, along with liquid and gas. In a solid state, particles are "packed" closely together and are not free to move about within the substance. Molecular motion for the particles in a solid is confined to very small vibrations of the atoms around their...
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Waiting for answer How do isotopes of carbon differ from one another?
They differ in the number of neutrons in the nucleus. are atoms that have the same number of protons but different numbers of neutrons. Carbon has 15 known isotopes, ranging from...
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Waiting for answer What are saturated, unsaturated and supersaturated solutions...
A Saturated solution is a solution that has dissolved the MAXIMUM amount of . An Unsaturated solution describes a solution that has a LESS than the max amount of solute dissolved. A Supersaturated solution describes a solution that has dissolved MORE than the maximum amount of solute, reached by h...
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Waiting for answer What is a monomial function?
A monomial is a mathematical expression which is made up of only one term . It cannot contain any addition or subtraction signs or a negative exponent. These are monomials: ##a^2## ##6a^2b^4## ##6x^2y^4## These are not monomials: (they are polynomials) ##b^3+c## ##5x^3## ##5x^3x^4#...
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Waiting for answer How do you find the square root of 300?
Basically, numbers under zero do not have a square root on the real numbers, but on the complex numbers, you can find one using the fact that ##i^2=1##. Depending on your level of studies, you might not know it yet. A solution would be using ##i^2=1## ##300i^2=300## ##sqrt(300i^2) = sqrt(300...
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Waiting for answer What type of mixtures can be separated by filtration?
You can use filtration to separate a of a solid in a liquid or a solid in a gas. Filtration is a separation process in which a mixture is passed through a filter that allows one com...
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Waiting for answer A spinner has equal sections numbered 18. If you spin the s...
The of the result not being 5 is just one minus the probability of getting a 5 which is ##7/8##. Another way to look at this is that if we know the probability of the result being 5,...
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Waiting for answer How do you convert 1m to cm?
##"1 m=100 cm"## ##1cancel"m"xx(100"cm")/( 1 cancel"m")="100 cm"##
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Waiting for answer How many cups are in 20 quarts?
##80 " cups" = 20 " quarts"## Handy relations to memorize: ##8 " ounces" = 1 " cup"## ##2 " cups" = 1 " pint"## ##2 " pints" = 1 " quart"## ##4 " quarts" = 1 " gallon"## If you r...
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Waiting for answer the spectroscopic notation (also called spdf notation) elec...
Ni is number ##28## on (Atomic number is ## 28##) spdf ##Ni : ## ##1s^2## ##2s^2## ##2p^6## ##3s^2## ##3p^6## ##3d^8## ##4s^2## To check the total of all powers: ##2+2+6+2+6+8+2 = 28## The power of the subshell(s, p, d, f) gives the number of electrons on each subshell. maximum values for s...
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Waiting for answer Why doesn't helium have a third ionization energy?
Simply put, because it does not have three electrons. is a measure of how much energy is needed to remove 1 mole of electrons from 1 mole of atoms in the gaseous state. Simply pu...
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Waiting for answer What is uniformitarianism?
Uniformitarianism is the assumption that the natural processes which have occurred in the geological past apply to this day, as well as the future. Uniformitarianism is the concept...
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Waiting for answer 5 grams of Methane (CH3OH) react with 10 grams of oxygen (O2...
NOTE: ##CH_3OH## is methanol and ##CH_4## is methane. I will solve for both since both undergo combustion reaction. So, 1) ##5## ##g## of ##CH_3OH##. The molecular mass of ##CH_3OH## is ##12+3+16+1=32## ##g## ##mol^1## So, the moles of ##CH_3OH## are ##5/32=0.15625 ## ##mol## ##10## ##g## of ##...
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Waiting for answer How do I work with log base e on a calculator?
##log_e = ln## Just use the ##ln## button it called the natural log and is written differently, If you are using a calculator you use ##ln## when the base of a ##log## is ##e##. Another example is, when the base of a log is 10 , ##log_10## in math we just write ##log##, and it is known that the ba...
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Waiting for answer How can I difference between substitution and elimination re...
Substitution is a reaction in which an atom or a group of atoms is replaced by another atom or group of atoms. In a general substitution reaction, Y replaces Z on a carbon atom. Substitution reactions involve ##sigma## bonds: one ##sigma## bond breaks and another forms at the same carbon atom. T...
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Waiting for answer Is dialogue often used to provide direct, indirect, intrinsi...
Indirect characterization. indirect characterization is characterization that is implied through clues, using dialogue, actions, appearances, words, effect on others, and thoughts. D...
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Waiting for answer What is the square root of x^12?
##x^6## ##sqrt(x^12)= (x^12 )^(1/2)= x^6## Law of Exponent ( ##x^m )^(n")## = ##x^(mn)## So, ##12(1/2) = 6## Note: Index of a radical is written as a denominator when express...
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