Homework answers and tutorials

Waiting for answer How do you solve the system of equations ##x+y=8##, ##xy=4#...
Systems of equations can be solved by plotting each of them as a graph in one frame of axis. The intersection point(s) will be the solution(s) to the equation. If there are no intersection points, the system of equations doesn't have solutions. In this system of equations you've got two linear equa...
$10.00 
Waiting for answer What is the distance of pluto to earth in AU?
39.7 Astronomical Units. 1 AU is ##1.49 x 10^8## km The distance between Pluto and the Sun in Km is 5.92 x ##10^9## km so, 5.92 x ##10^9## / 1.49 x ##10^8## Distance to Pluto in...
$10.00 
Waiting for answer What is the gram formula mass of ##KMnO_4##?
What's ##(39.1+54.9..............)*g*mol^1## ##(39.1+54.9+4xx15.999)*g*mol^1=??*g*mol^1.## From where am I getting these numbers?
$10.00 
Waiting for answer What levels of organization include abiotic factors?
Generally, the ecosystem is the lowest level of organization that is considered to include nonliving (abiotic) factors. So that would mean that ecosystems, biomes, and the biosphere include abiotic factors. The traditional levels of organization are as follows: Biosphere Biome Ecosystem Commun...
$10.00 
Waiting for answer What are the conjugate bases of the acids HF and HClO ?
The conjugate bases are ##"F"^## and ##"ClO"^##. According to the BrønstedLowry theory, an acid ##"HA"## donates a proton to a base ##"B"##. Its conjugate base ##"A"^## is the...
$10.00 
Waiting for answer The equatorial circumference of Earth is about ##4*10^4## ki...
About 11 times. To find how many times greater the circumference of Jupiter is than the circumference of Earth, we divide Jupiter's circumference by Earth's circumference. ##4 * 10^...
$10.00 
Waiting for answer How many protons, neutrons, and electrons are in a neutral a...
Protons 11 Neutrons 12 Electrons 11 The subatomic particles (protons, neutrons and electrons) can be determined using some basic information from . The of an element is always eq...
$10.00 
Waiting for answer Which president started the Bull Moose Party?
Theodore Roosevelt! The Bull Moose Party, officially known as the Progressive Party, was founded by Theodore Roosevelt when the Republican Party refused to nominate him as their pre...
$10.00 
Waiting for answer How does heat energy affect the movement of water molecules?
Water is affected by heat energy by either freezing or vaporizing, depending on the type of energy. Technically, heat is what we call the flow of thermal, kinetic . This idea is simi...
$10.00 
Waiting for answer What is the medical term for a heart attack?
Myocardial infarction (MI) Myocardial infarction – The damaging or death of an area of the heart muscle (myocardium) resulting from a blocked blood supply to that area; medical term...
$10.00 
Waiting for answer What causes hydrostatic pressure in blood vessels?
Hydrostatic pressure in blood vessels is caused by the weight of the blood above it in the vessels. Hydrostatic pressure is the pressure exerted by a fluid at a given point, due to the weight of the fluid above it. Blood is a fluid, so blood has a hydrostatic pressure. Increased elevation incr...
$10.00 
Waiting for answer How to draw a lewis structure of carbon dioxide, CO2?
The first thing you need to do is to determine the number of per atom. You can do this by either (1) drawing the or (2) consulting the group number of your element in . If you go with (1), we will have these: C (atomic number = 6) : ##1s^2## ##color (red) (2s^2)## ##color (red) (2p^2)## (outermo...
$10.00 
Waiting for answer Is potassium iodide an ionic or covalent compound?
Potassium iodide is an ionic compound. Potassium is in Group 1 of . That means it is a metal. Iodine is in Group 17 of the Periodic Table. That means it is a nonmetal. Metals reac...
$10.00 
Waiting for answer What is the integral of the error function?
##int"erf"(x)dx = x"erf"(x)+e^(x^2)/sqrt(pi)+C## We will use the definition of the error function: ##"erf"(x) = 2/sqrt(pi)int_0^xe^(t^2)dt## Along with , , and the . : Let ##u...
$10.00 
Waiting for answer How can we get 1methylcyclohexanol from cyclohexanone , by...
##"LiAlH"_4## does not ever add a methyl group; it is a hydride donor , so naturally you would get cyclohexanol. (You can alternatively tell because there is no carbon in the compound.) Also, it is typically NOT used on ketones or aldehydes, because those are reactive enough to be reduced by ##"Na...
$10.00 
Waiting for answer What is the order of the planets in terms of age from younge...
A planet's age is a little less than Sun's age of 4.6 billion years. Gas planets might be little younger than rocky planets. Sun's age is about 4.6 billion years. Planets formed f...
$10.00 
Waiting for answer Which part of the human male reproductive system has a funct...
It is vas Deferens. In female function of the fallopian tubules is to carry the ovum released by the ovaries. In the same way, In male reproductive system, function of the Vas Defer...
$10.00 
Waiting for answer What is the domain, kingdom, phylum, order, family and genus...
They all belong to the same Phylum () because they all have a spinal chord. Therefore, they also all belong to the same Kingdom and Domain. The dog and zebra are both Class , while t...
$10.00 
Waiting for answer What is the molality of a solution of 560 g of acetone, ##CH...
##"16 mol kg"^(1)## You can calculate a solution's by keeping track of how many moles of you get in one kilogram of . This means that in order to calculate , you essentially n...
$10.00 
Waiting for answer What is the molecular, total ionic, and net ionic equation f...
First, you must recognize that this is a . Next you must write the for the products. You know that ##"NO"_3## has an ionic charge of 1 and ##"S"## has a charge of 2. So the ionic...
$10.00