Homework answers and tutorials

Waiting for answer How many times larger is the Milky Way Galaxy than the Sun?
The Milky Way Galaxy is nearly 68 trillion times larger than . A. The mean diameter of the Sun is about 1.392 x 10^6 km. B. The diameter of the Milky Way is usually considered to be...
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Waiting for answer What is the molar mass of sodium carbonate, (Na2CO3)?
The molar mass of sodium carbonate is ##"105.987 g/mol"## To calculate the molar mass of a compound, multiply the subscript of each element from the formula times the molar mass of...
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Waiting for answer The Roaring Twenties gave way to the Great Depression of the...
They showed how the life was i the roaring twenties by writing books that showed the lifestyles of people who lived back then, one of the books that was written by F. Scoot Fitzgerald is the Great Gatsby, which showed the lifestyle of a rich man and his day to day life.
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Waiting for answer What things can affect the function of an enzyme?
Temperature, pH, concentration of enzymes, concentration of the substrate and concentration of any enzyme inhibitors. Enzymes are large protein molecules that help to speed up react...
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Waiting for answer Why is ammonia a Lewis base?
Ammonia can be a lewis acid or base depending on what its reacting with. If it accepts electrons, its a Lewis Acid. If it donates its lone pair of electrons to a substance, then its a Lewis Base.
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Waiting for answer What does it mean when you have low blood platelets?
Platelets help in coagulation or blood clotting during any cut or injury to blood vessel. If anyone has low platelet level in the blood , then in case of injury or cut , blood coagulation process will be slow and will lead to loss of excess amount of blood.
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Waiting for answer How do you solve for variable w in the equation ##v=lwh##?
The point of an equation is to keep an equality, so anytime you apply something on one side of the equation, you have to make sure you apply the exact same thing on the other side. Starting with ##v=lwh## Your goal is to find what is ##w## In order to solve it I will apply different division on bot...
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Waiting for answer How do you convert 315 degrees into radians?
##7/4 pi## radians To change from degrees to radians use the following formula: degrees##*(pi## radians##/180## degrees##)## the ##(pi/180)## means that for every ##pi## radians yo...
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Waiting for answer What are adaptations that enable plants to reduce water loss...
There are many adaptations in plants to reduce water loss from their leaves. Some plants have a waxy coating on their leaves. Some plants will shed their leaves during summer months...
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Waiting for answer How do you calculate enthalpy change of combustion?
You usually calculate the change of combustion from enthalpies of formation. The standard enthalpy of combustion is ##ΔH_"c"^°##. It is the heat evolved when 1 mol of a substance b...
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Waiting for answer How do prokaryotic cells divide?
The usual method of prokaryote cell division is termed . The prokaryotic chromosome is a single DNA molecule that first replicates, then attaches each copy to a different part of the cell membrane. When the cell begins to pull apart, the replicate and original chromosomes are separated...
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Waiting for answer How do you simplify the cubed root of 150?
##color(green)("Depending on the interpretation of the question:")## ##color(blue)(750sqrt(6)" ") color(brown)(" As an exact value (decimals are not always exact)")## Braking the qu...
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Waiting for answer How did the threefifths compromise help the south preserve...
The ThreeFifths compromise gave southern states disproportionate representation in the House of Representatives relative to free states, thereby helping the southern states to preserve slavery....
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Waiting for answer Which sample of fluorine gas, F2, contains the greatest numb...
Let's use the symbol ##N_A##, where ##N_A## ##=## ##6.022xx10^23##. A. there are approx. ##1/3N_A##, INDIVIDUAL ##F_2## molecules. B. there are approx ##1/12N_A##, INDIVIDUAL ##F...
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Waiting for answer How do you prove ##(1tanx)/(1+tanx) = (1sin2x)/(cos2x)##?
Use the following facts: ##tanx=sinx/cosx## ##sin2x=2sinxcosx## ##cos2x=cos^2xsin^2x## ##sin^2x+cos^2x=1## So you get: ##(1sinx/cosx)/(1+sinx/cosx)=(12sinxcosx)/(cos^2xsin^2x)## ##(cosxsinx)/cancel(cosx)*cancel((cosx))/cancel((cosx+sinx))=(12sinxcosx)/((cosxsinx)cancel((cosx+sinx)))## Taki...
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Waiting for answer Why does the entropy is defined by q reversible? what is the...
is defined as ##\mathbf(DeltaS = q/T),## where the definition separates as ##DeltaS (q_"irr")/T,## ##DeltaS = (q_"rev")/T,## with ##q_"irr"## being the inefficient, irreversible heat flow, and ##q_"rev"## being the efficient, reversible heat flow. ENTROPY VS HEAT FLOW By definition,...
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Waiting for answer If sin theta = 3/5 and theta is acute, how do you calculate...
##costheta=4/5, and, tantheta=3/4##. We will use the Identity ## : sin^2theta+cos^2theta=1##. ##:. cos^2theta=1sin^2theta=1(3/5)^2=19/25=16/25## ##:. costheta=sqrt(16/25)=+4/5...
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Waiting for answer How do polyatomic ions get their charge?
have a charge because they have more or fewer valence electrons than the neutral atoms that make up the ions. The most common polyatomic cation is the ammonium ion, ##"NH"_4^+##....
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Waiting for answer Is uniform circular motion in equilibrium?
(first answer) No. For a system to be in equilibrium, there must be NO . In uniform , we must have at least centripetal acceleration because the direction is constantly changing. See the physics classroom for more information on circular motion: http://www.physicsclassroom.com/class/circles/L...
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Waiting for answer How do you solve titration problems?
Watch this video! I would highly recommend that you watch the following video where I fully explain the acidbase titration experimentally and the calculation that should be carried...
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