Homework answers and tutorials

Waiting for answer What is the reciprocal of 6?
Reciprocal of ##6## is ##1/6##. A number ##x## is a reciprocal of another number ##a##, if the product of ##x## and ##a## is ##1## i.e. ##x xx a =1##. Now multiplying both sides by...
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Waiting for answer How do isotopes relate to average atomic mass?
Every isotope (at least, the ones that occur naturally) contributes to the average , which appears in the element's box on most periodic tables. But the average is what is called a weighted average. A weighted average mass is an average that takes into account how many times each mass occurs in a s...
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Waiting for answer How do you solve for y in ##x2y=1 ##?
##color(green)(y =( x 1)/2 ## ##xcolor(blue)(2y)=1## Since we need to solve for ##y## we need to isolate the term containing ##y##: ##x 1 = color(blue)(2y)## ##color(green)(2...
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Waiting for answer What is the strongest muscle in the human body?
The strongest muscle in the human body is the tongue
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Waiting for answer How did we come to know the tetrahedral shape of methane, as...
Even though we can't see the molecules, we can tell much about them from the physical and chemical properties of the compound. For example, we know by chemical analysis that the molecular formula is CHâ‚„. We know that all the H atoms are equivalent. If we replace one of them with a Cl atom, we get...
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Waiting for answer How do alleles affect inherited traits?
Alleles are the DNA sequence(s) on chromosomes that code for the amino acid sequence in the protein(s) that will catalyze the metabolic sequences (for instance development) that result in a specific trait, usually referred to as a phenotype. Sexually reproducing organisms (humans) are diploid 2N, s...
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Waiting for answer What is an example of verbal irony and situational irony in...
Verbal irony in Julius Caesar could be: "... and Brutus is an honourable man." Situational irony in Macbeth could be: right after Macbeth kills Duncan, he believes that he is now king, but must then continue killing people to keep himself in power....
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Waiting for answer How do you draw a Newman projection for hexane while sightin...
You follow a series of steps. Step 1. Draw the structure of hexane. Step 2. Convert it to a wedgedash structure at ##"C2"## and ##"C3"##. Step 3. Identify the groups on...
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Waiting for answer If plant cells are autotrophs and animal cells are heterotro...
Surprisingly there is a third type. Organisms have to make food by producing, consuming, and decomposing. Producers are the organisms that make their own food from molecules and so...
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Waiting for answer What is denaturation and what causes denaturation in protein...
Denaturation is something normal while you give such a stressful situation to or DNA that their quaternary, tertiary and secondary structures is lost. As we said before, denaturati...
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Waiting for answer If ##tan(theta) = 3/4## and ##sin(theta) < 0##, how do yo...
If ##tan theta = 3/4## and ##tan theta = (opposite side)/(adjacent side) = a/b## then ## a = 3 , b = 4## solve for the hypotenuse side ##c^2 = a^2+b^2## ##c^2 = 3^2 + 4^2## ##c = sqrt(9 + 16)## ##c = 5## For ##cos theta = (adjacent side)/(hypotenuse) = b/c## ##cos theta = 4/5## Answer
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Waiting for answer How long is 7/10 of a mile, in feet?
##3696## feet Each mile has ##8## furlongs. Each furlong has ##220## yards and each yard has ##3## feet. Therefore each mile has ##8xx220xx3=5280## feet and ##7/10## mile will have...
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Waiting for answer What is the additive inverse property?
Additive Inverse Property For all element ##a##, there is a unique element ##a## such that ##a+(a)=0## I hope that this was helpful.
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Waiting for answer How do you write ##137.5%## as a fraction?
##11/8## We can write a percentage as a fraction by taking the percentage and dividing it by 100. In this case: ##137.5% = 137.5/100## We want to simplify our fraction now, and the...
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Waiting for answer How many atoms are in the universe?
Under the given assumptions (a) Assume that all of the atoms in the universe are hydrogen atoms in stars. (b) Assume that is a typical star composed of pure hydrogen with a density of ##1.4gcm^3## and a radius of ##7xx10^8m##. (c) Assume that each of the roughly 100 billion stars in the Milky Wa...
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Waiting for answer Why does Sodium lose an electron and attains +1 charge?
Because sodium has 1 electron in the valence shell and it prefers to lose it rather than gain extra 7 electrons. Sodium has 1 electron in its valence shell (outermost orbit). When an...
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Waiting for answer There are 150 calories in a cup of whole milk and only 82 in...
##approx 45 1/3 %## ##(15082)/(150)=34 / 75 approx 45 1/3 %##
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Waiting for answer What is the molar mass of methane, ##CH_4##?
##16g//mol## Simply add the molar masses of each atom that makes up the molecule, obtaining each element's molar mass from . In this case, we get ##M_r (C)+4Mr(H)=12+(4xx1)=16g//m...
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Waiting for answer What is vant Hoff equation ?
It is an equation that relates equilibrium constant to temperature. can change according to temperature. The Van't Hoff equation defines the change in equilibrium constant as a fun...
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Waiting for answer What is acetylcholine classified as?
It is a neurotransmitter Acetylcholine is a neurotransmitter that is responsible for making muscles move. For example, when you move your arm, a flow of acetylcholine is released, an...
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