Homework answers and tutorials

Waiting for answer Who was an example of a muckraker?
Upton Sinclair Is one of the most famous muckraker. Upton Sinclair is know for his novel, the jungle. The Jungle is a story about Americans meat packing industry. Sinclair is know a...
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Waiting for answer What is the empirical formula of caffeine?
##"C"_4"H"_5"N"_2"O"## To find the empirical formula for caffeine we begin with the Molecular (true) Formula ##C_8H_10N_4O_2## We can then reduce the Molecular Formula to the Em...
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Waiting for answer How do you create an exponential function y=ab^x given (21,...
##y=1*1.00014871^x## ##23.392=a*b^21200## There are two variables, so I'll assign 1 to a ##23.392=1*b^21200 ## ##23.392^(1/21200)=(b^21200)^(1/21200) ## ##1.00014871=b## So the equ...
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Waiting for answer What is the constant of variation in the circumference formu...
How does the formula for circumference relate to the formula for constant of variation: ##y=kx##? The constant of variation (k) for the circumference formula is: ##k=2pi## hope tha...
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Waiting for answer What is the difference between a collective noun and a compo...
Collective noun  a noun that refers to a collection of things. Compound noun  a noun made of two or more words. Collective : the word "group" is a collective noun, and can refer to...
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Waiting for answer Why do geologists know so little about Precambrian history?
Geologist do not know about the Precambrian Era because a lot of the evidence was destroyed a long time ago. The reason we don't know about the Precambrian era is because the earth w...
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Waiting for answer Marsha, Josh, and Tyler are comparing how fast they can type...
Marsha, Tyler, Josh. In order to compare them, we need to change all the of typing into the same unit. Words per minute means divide the number of words by the number of minutes....
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Waiting for answer How many electrons does hydrogen have?
It has 1 Hydrogen is the first element on the periodic tale, with an of 1. The one means that it has 1 proton, and the number of protons and electrons is the same, so it has 1 elect...
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Waiting for answer Struggling with this question on finding the surface area of...
I got ##75pi## The area of a sphere is ##4pir^2## so half of it is ##4/2pir^2=2pir^2## and we need to evaluate the radius ##r##; The volume of the entire sphere is ##V=4/3pir^3##....
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Waiting for answer How can I convert Newman projection for the staggered and ec...
Here are the six Newman projections for the staggered and eclipsed conformations of 2methylpentane. I doesn't matter which one we choose, so let's start with Structure A. Note that there is a carbon atom at the centre of the "Y" in the middle of the circle, and there is also a "hidden" carbon be...
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Waiting for answer When CH3CHCH2 is passing through by HBr in the presence of o...
Bromo propane in the presence of peroxide anti markovnikovs rule is followed that is the negative part of reagent is added to more number of hydrogens containing double bond carbon...
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Waiting for answer What is the rock's age? A rock contains onefourth of its or...
The rock's age is approximately ##"2.6 billion"## years. There are essentially two ways of solving problems. One way is by applying the halflife formula, which is ##A(t) = A_0(t) * (1/2)^(t/t_(1/2))## , where ##A(t)##  the quantity that remains and has not yet decayed after a time t; ##A_0(t...
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Waiting for answer How do you find the decimal notation of a percent?
Divide the percentage by ##100## When you divide the percentage by ##100##, you get the decimal notation. e.g. ##100/100####=####1## or ##1.0## ##75/100####=####.75## ##50/100...
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Waiting for answer How do you know which element is the most reactive in the pe...
The periodic trend of reactivity depends on whether the are metals or nonmetals. For metals, reactivity increases down a group and from right to left across a period. Nonmetals do the opposite. For nonmetals, reactivity increases up a group and from left to right across a period. Francium is t...
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Waiting for answer How can I find the molecular formula from molar mass?
You start by determining the empirical formula for the compound. Determine the mass in grams of each element in the sample. If you are given , you can directly convert the percentage of each element to grams. For example, a molecule has a molecular weight of 180.18 g/mol. It is found to contain...
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Waiting for answer How do you round 476 to the nearest hundred?
500. Determine the hundred which is 4. then, look at the number before the the number you want to round off. in this case, you want to round off the hundred value which is 4 and the...
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Waiting for answer How do you find the derivative of ##cos(pi x)##?
The derviative is ##pisin(pix)## You must use the chain rule to calculate this derivative since there is a function (##pi*x##) inside of another function (the cosine function ##cos(...
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Waiting for answer The ratio of forks to knives in Kim's kitchen drawer is 4 to...
I cant quite understand the question but if the 'of 3' is not there then: If there are 16 forks and a ratio of 4 to 5 you can calculate how any 'sets' are in the 16 by doing 16/4 which is 4. Times this by 5 as we have 4 sets and need to know how many knives. Therefore you have 20 knives.
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Waiting for answer Are Aliens real? Is it possible that life on other planets i...
pretty much yes! statistically speaking, there must be other life forms in this vast universe, we haven't looked everywhere in fact we aren't even close to that. we are discovering...
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