Homework answers and tutorials

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Waiting for answer Determine the pH of a .22M ##NaF## solution at ##25^@"C"##?...
The of your solution will be equal to 8.90 . Sodium fluoride, ##NaF##, is a soluble salt that dissociates completely in aqueous solution to give sodium cations, ##Na^(+)##, and fluoride anions, ##F^()##. ##NaF_((s))  Na_((aq))^(+) + F_((aq))^()## Since 1 mole of sodium fluoride produces 1 m...
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Waiting for answer How do you write 1/6 as a decimal?
.166667 or .166666(repeating 6) divide 1 by 6 and get .1666 and choose whether to simplify or say it is repeating
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Waiting for answer Why do people say English is the hardest language to learn?
Perhaps because people have no interest in the language. If you want to master anything at all first you have to have interest in the subject or in what you want to do.
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Waiting for answer What is the square root of 125/5?
##5## Question: ##sqrt(125/5)## For this question, you need to know the following formulas: ##sqrt(a/b) = sqrta/sqrtb## ##sqrt(axxb) = sqrta xx sqrt b## ##sqrt(125/5) = sq...
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Waiting for answer Kinkeddemand curve model justify the ''stickiness'' of pric...
Price rigidity exists in oligopoly as their interdependence on each other stops them from changing prices without losing their competitive edge. In the diagram above, P is the curre...
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Waiting for answer Are the electrons in a coordinate covalent bond donated by b...
In a coordinate covalent bond, the electrons are conceived to be supplied by the ONE atom............ Consider the acidbase behaviour of ammonia: ##H_3N(aq) + H_2O(l) rightleftharp...
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Waiting for answer Why does secondary succession occur faster than primary succ...
because the soil is already formed Soil formation is one of the determinat factors to,allow a vegetal community to settle. The primary succession starts from no soil or almost anythi...
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Waiting for answer What are the units for k in first, second, and third order r...
The units for ##k## are ##"s"^(1)##, ##"LĀ·mol"^(1)"s"^(1)##, and ##"L"^2"mol"^(2)"s"^(1)##. The units come from the rate laws rate = ##k["A"]^n##, where ##n## is the order of...
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Waiting for answer Why does ice float on water?
Ice floats on water because it is less dense than water. is as mass per unit volume of a substance. By saying that ice is less dense than water, we mean that a sample of ice will take up more space than a sample of water that has the same mass. Ice and water are both made of the same element ##H...
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Waiting for answer Why does ##x < 0## have no solution?
This is impossible due to the definition of . An absolute value is the distance of a number from zero on the number line. For instance, three on the number line is the value of three...
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Waiting for answer What are the accessory sexual organs of the male reproductiv...
Accessory male sexual organs are generally the glands. The vas deferens is internal accessory organ (along with the glands) while penis is external accessory organ. Accessory male...
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Waiting for answer What are complex carbohydrates also known as?
Polysaccharides are complex . There are several complex carbohydrates: all are chains of smaller sugar molecules. Most common complex carbohydrates are starch , stored by plants a...
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Waiting for answer Who started the protests that led to the May Fourth Movement...
University students May Fourth Movement was started by the University students who were angry at China's treatment at the hands of western powers after world war 1.
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Waiting for answer What is the solution set of the equation ##x/5 + x/2 =14##?
##x = 20## ##x/5 + x/2 = 14## can be rewritten as a fraction ##1/5x + 1/2x = 14##. Use common denominator to add fraction ##2/10x + 5/10x = 14## ##7/10x = 14## Solve for x by mul...
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Waiting for answer How do you do square root of 98 divided by square root of 18...
The answer is ##7/3## Start off by finding the factors of the numbers to simplify the square roots. For example, ##18=9*2## so ##sqrt18=sqrt9 * sqrt2## but ##9=3*3## so ##sqrt18=sqr...
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Waiting for answer What is the structure of L(+) Glucose and L() Glucose? What...
Lglucose is the mirror image of Dglucose. Dglucose can exist in the straightchain form (above) and as four different cyclic structures. In solution, it consists of an equilibr...
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Waiting for answer Given ##H = x^2 + 8##, what is ##H^1##?
The notation ##H^1## means the inverse function. The equation of the inverse function can be found by switching the ##x## and ##y## values inside the function. ##y = x^2 + 8## ##x = y^2 + 8## ##x  8 = y^2## ##y = +sqrt(x  8)## Hence, ##H^1(x) = +sqrt(x 8)##. Hopefully this helps!
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Waiting for answer How do you graph ##xy=7## by plotting points?
Convert the equation to . Determine two points. Plot the points and draw a straight line through the points. Rearrange the equation to intercept form, ##y=mx+b##, where ##m## is the...
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