Homework answers and tutorials

Waiting for answer What is biochemistry?
Biochemistry is one of the crossover fields of chemistry. It's basically the chemistry of the living world. Plants, animals, and singlecelled organisms all use the same basic chemic...
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Waiting for answer Every natural number is positive?
It depends... Natural numbers are always nonnegative and whole, but sometimes ##0## is considered a natural number and sometimes it is not. One way of thinking of it is as follows:...
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Waiting for answer What was the major threat to the Habsburg Empire?
Probably the Ottoman Empire Vienna was sieged (but not taken) twice by the Turks. Once in 1529 and again in 1683. The Habsburg lost huge slates of territory to the exapanding Ottoman...
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Waiting for answer How are monomers, polymers and macromolecules related?
Monomers are smaller molecules, and when bonded together, make up polymers . Fatty acids are the monomers for lipids , for example, and regardless of how they are bonded (as a saturated or unsaturated fat, for example), they will form lipids. Nucleotides form nucleic acids (eg. DNA) Monosa...
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Waiting for answer What is the Arrhenius acid that contains the bromite anion?
This acid would be called bromous acid and has the formula ##HBrO_2## The bromite ion (##BrO_2##) has a 1 charge, so it must be paired with one hydrogen ion (##H^+##) Acid names of ternary acids (contain such as bromite) will not include the prefix hydro. They will have a name ending which indi...
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Waiting for answer Suzie and Scott drive together for American freight. One day...
##t_2=8h## ##v_1=54mph## ##v_2=58mph## ##Deltat=3h## ##t_2=t_1+Deltat = t_1=t2Deltat## ##s=s_1+s_2=734m## ##t_2=?## ##s_1=v_1*t_1## ##s_2=v_2*t_2## ##s=v_1*t_1+v_2*t_2## ##s=v_1*(...
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Waiting for answer What is the empirical formula of potassium chloride?
The empirical formula for potassium chloride is ##"KCl"##. The empirical formula for a compound is the lowest whole number ratio of in one molecule or formula unit of the compound....
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Waiting for answer How do you write 140 as the product of its prime factors?
##140=2xx2xx5xx7## To write any number as a product of its prime factors, we should find all those which when multiplied together form the number. Note that in such factorization, p...
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Waiting for answer Why is ozone, ##O_3##, bent and not linear ?
The of the ozone molecule is bent because of the lone pair of electrons present on the central oxygen atom. There are at least three used to describe the ozone molecule, but I'll only focus on two of them, the major contributors to the actual hybrid structure . Notice that the central oxygen...
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Waiting for answer How do you simplify ##(sec^2x)  (tan^2x)##?
##sec^2 x  tan^2 x = 1## Note that: ##sin^2 x + cos^2 x = 1## Hence: ##cos^2 x = 1  sin^2 x## and we find: ##sec^2 x  tan^2 x = 1/cos^2 x  sin^2 x/cos^2 x## ##color(wh...
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Waiting for answer Why are c4 plants more efficient than c3 plants at fixing ca...
C4 plants like maize, sugarcane etc. possess a special type of cell called "Bundle Sheath Cells" around vascular bundle. While C3 plants like wheat, bajra etc. don't possess these cells. The speciality about these cells is that they are able to fix up CO2 in the absence of atmospheric CO2 while C3...
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Waiting for answer What are 2 functions of the clitellum?
Clitellum is a glandular non segmented part generally present in earthworms and leeches. Main Functions of Clitellum: 1. During Copulation, the clitellum secretes a fluied that keeps...
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Waiting for answer What is the GCF of 16, 24, and 32?
##8## Working out all the factors of 16, 24 and 32, you will find that 8 is the greatest one that all of them share. Also, you cannot have a factor that is greater than half of the...
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Waiting for answer How do you calculate osmolarity from molarity?
You multiply the molarity by the number of osmoles that each produces. An osmole (Osmol) is 1 mol of particles that contribute to the osmotic pressure of a solution. For example,...
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Waiting for answer How many sp2 and sp3 hybridized carbons are in naproxen?
There are eleven ##sp^2## and three ##sp^3## hybridized carbons in Naproxen. The structure of Naproxen is Every doublebonded carbon atom is ##sp^2## hybridized. That includes th...
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Waiting for answer How do you find the integral of ##int (lnx / sqrt(x)) dx## f...
I found: ##4## Let us try by changing ##1/sqrt(x)==x^(1/2)## and then Integrate By Parts: ##int(ln(x)/sqrt(x))dx==int(x^(1/2)ln(x))dx=## ##=2x^(1/2)ln(x)int(2x^(1/2)*1/xdx)=## ##...
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Waiting for answer What is the greatest common factor of 21 and 63?
##21## Both ##21## and ##63 = 3 * 21## are divisible by ##21## and ##21## has no greater factor, so this must be the .
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Waiting for answer Who discovered DNA?
DNA is deoxyribonucleic acid. It was first isolated by Friedrich Miescher from pus (collection of dead white blood cells), he called it 'nuclein'. Chemistry of nucleic acid was discovered by Albrecht Kossel while the term 'nucleic acid' was coined by Richard Altmann....
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Waiting for answer What is the difference between a star, sun, planet and a moo...
A star is a luminous sphere of gas held together by its own gravity. is a star. A planet orbits the star, while a moon orbits the planet. Stars are visible to the naked eye from ear...
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