Homework answers and tutorials

Waiting for answer A ketone has the molecular formula C5H10O. Write the structu...
A ketone has one double bonded oxygen atom, but not at the end of a (sub) chain (or it would be an aldehyde). Step 1: Make a straight chain of ##C##'s. You can place the ##=O## at th...
$10.00 
Waiting for answer What information do you need to calculate the average atomic...
of and percentage abundance to calculate average atomic mass you need to know about mass of ISOTOPES of that substance... and percentage abundance in nature.. To calculate t...
$10.00 
Waiting for answer What is the formula for calculating the test statistic for a...
Is it onepopulation z test? Because we cannot have one sample only in stat experiments. In z test, it is preferable to have n = 30. We have the formula, z= (computed mean  hypothesized mean) divided by the standard error. SE(standard error) = standard deviation/n.
$10.00 
Waiting for answer How do electron configurations correspond to the periodic ta...
When looking at , your fill order of electrons is: 1s 2s 2p 3s 3p 3d 4s 4p 4d 4f 5s etc. Group 1A (1), the alkali metals all end is s1. What period the element is in determines the 1st number. Example: H ends in 1s1 (even though H is not a metal, it resides in this group because...
$10.00 
Waiting for answer What is the difference between chromosomal mutations and poi...
Chromosomal mutation is structural changes in Karyotype or mutation of chromosome Point mutation is mutation of gene. Chromosomal mutation is change of Structure of chromosome a...
$10.00 
Waiting for answer What is a general definition for Bohr's postulates?
Here it is how I studied them (looooooong time ago!!!) Here we go: 1) The orbits and the energies of the electrons in an atom are quantized, that is only certain discrete orbits and...
$10.00 
Waiting for answer How do you find the six Trig values of 450 degrees?
Find 6 values of trig functions. sin (450) = sin (90  360) = sin (90) =  sin (90) =  1 cos (450) = cos (90 360) = cos (90) = 0 ##tan (450) = sin/(cos) =## infinity ##cot (...
$10.00 
Waiting for answer Ammonia gas is alkaline or acid?
Ammonia gas behaves as an alkali in water........................ Ammonia gas is exceptionally soluble in water, and an experiment called the ##"ammonia fountain"## (which you'll hav...
$10.00 
Waiting for answer What is interphase in mitosis?
Interphase is the period between cell divisions. Many processes occur during this time. As you can see in this picture, Interphase is the life of a cell when it's not dividing. Ther...
$10.00 
Waiting for answer How do you find the sum of the infinite geometric series 1/3...
##Soo= 1/2## Formula for sum of infinite geometric series is ##S_oo=a_1/(1r)## ; ##" " " " " 1 r 1## We have a geometric series :##1/3 + 1/9 + 1/81+.........## Fi...
$10.00 
Waiting for answer How do you name and draw stereoisomers for 2pentene?
Start by drawing a chain of five carbon atoms. Draw a double bond between carbons 2 and 3. Note that there are two ways to insert the double bond. One has the ##"H"## atoms on...
$10.00 
Waiting for answer The measure of the obtuse angle in the isosceles triangle i...
##40^circ,40^circand100^circ## In an Isoceles triangle, the two base angles are equal. Let the base angles be ##x##. Then, the obtuse angle would be ##2 1/2*x## We need to find the...
$10.00 
Waiting for answer What was the result of the crisis over the 1832 tariff?
It deepened the differences and hostilities between the north and south. The tariff placed a tax on imported goods. It favored the north by encouraging purchases of domestic goods bu...
$10.00 
Waiting for answer 22 is 5 percent of what number?
440 This can be written in the equation: ##22=.05x## As with any equation, you solve for ##x##: ##22/.05=(.05x)/.05## 440 = ##cancel (.05x)/cancel .05## 440 = ##x## We can prov...
$10.00 
Waiting for answer What would be the major product obtained from the hydrobora...
The major product will be a racemic mixture of trans2methylcyclohexanol. The reaction amounts to an antiMarkovnikov addition of water to the C=C double bond. Instead of adding to C2 of the ring in a Markovnikov reaction, the H adds to C1, and the OH adds to C2. The reaction is also a cis ad...
$10.00 
Waiting for answer What is the difference between isotope notation and hyphen n...
In isotopic notation, the of the isotope is written as a superscript in front of the chemical symbol for that element. In hyphen notation, the mass number is written after the name of the element. For example, in isotopic notation, the isotope of carbon that has a mass number of twelve would be re...
$10.00 
Waiting for answer What is the difference between real numbers and rational num...
Although all rational numbers are real numbers, there are some numbers (irrational numbers) which are not rational numbers. Rational are those numbers which can be written as a ratio...
$10.00 
Waiting for answer What are the branches of chemistry and their definition?
The five major branches of chemistry are organic, inorganic, analytical, physical, and biochemistry. These divide into many subbranches. ORGANIC CHEMISTRY Organic chemistry invo...
$10.00 
Waiting for answer A computer does a calculation in 5 nanoseconds. How many of...
##=2times10^8## calculations ##1/(5times10^9## ##=200000000 ## calculations ##=2times10^8## calculations
$10.00 
Waiting for answer What is the conversion factor between km/hr and m/s?
To convert ##(km.)/(hr.)## to ##m/(sec)##, one needs to multiply by ##5/18##. ##1## km/hr means ##1000## meters in ##3600## seconds or ##1000/3600=5/18## ##m/sec##. Hence, if one ha...
$10.00