Homework answers and tutorials

Waiting for answer Why is the enthalpy of neutralization between a weak acid an...
See explanation. In every reaction in aqueous solution, the fundamental chemical reaction is: ##H^(+)(aq)+OH^()(aq) H_2O(l)## Since this reaction involves bond formation only, e...
$10.00 
Waiting for answer BrO3(aq) + Sb3+(aq) = Br(aq) + Sb5+(aq) (acidic solution...
##BrO_3^()+3Sb^(3+)+6H^(+)rarrBr^()+3Sb^(5+)+3H_2O## We can use to help balance this equation. Consider first the bromate(V) ion ##BrO_3^##. It is converted to ##Br^## ##BrO_3^()rarrBr^## ##+5rarr1## Bromine has changed from +5 to 1. This will require the addition of 6 electrons: ##Br...
$10.00 
Waiting for answer When a positive integer k is divided by 7, the remainder is...
It is 1. If a positive integer k has a remainder 6 when it is divided by 7, it is of the form: ##k = 7n + 6##, where n is an integer. Hence, k+2 would have such a form: ##k+2 = 7n...
$10.00 
Waiting for answer How do you write an equation with Xintercept of 3 and yint...
##y = 2/3x + 2## By definition the xintercept of 3 is the point (3, 0) and By definition the yintercept of 2 is the point (0, 2). Because we have two points we can use the point...
$10.00 
Waiting for answer How many time zones are in China?
One. China has one time zone for the entire country.
$10.00 
Waiting for answer How many inches are in 1/3 yard?
##12## inches conversion factor: ##1## yard = ##3## feet ##[1 yard]/3 = [3 feet]/3## ##1/3## yard = ##1## foot ##1## foot = ##12## inches so ##1/3## yard = ##12## inches
$10.00 
Waiting for answer How do you find the mean, median, mode and range for 53, 32,...
median is the central value so we must first put the numbers in order from smallest to largest ##24, 32, 49, 53, 62## The central number (number in the middle) is 49 therefore the mean is 49 We find the mean by adding all the numbers together then dividing that sum by the amount of numbers that wer...
$10.00 
Waiting for answer What impact did the Indian Removal Act have?
Continuity of Expansionism, the Trail of Tears, and the increase of tensions between the US and many Native American tribes First off, Andrew Jackson's Indian Removal Act forced Nati...
$10.00 
Waiting for answer Is iced water a pure substance? Why?
Yes iced water is a pure substance. Both ice and liquid water are the same substance. ##H_2O## Though ice water is a mixture of both solid and liquid it is a pure substance, based o...
$10.00 
Waiting for answer Is Calcium paramagnetic or diamagnetic? And why.
An isolated ##Ca## atom is diamagnetic, since its shows no unpaired electrons. ##Ca: [Ar]4s^2## However, an element's magnetic character does not depend solely on , it depends on the empty orbitals that are next to the valence orbitals as well. Notice that you have a vacant 3dorbital very cl...
$10.00 
Waiting for answer How do you add radicals ##sqrt10 + sqrt10##?
You can simply combine like terms and call it ##2sqrt10##. Say I had ##x + x##. There are two ##x## terms, so we call it ##2x##, or two times ##x##. Say we let ##x = sqrt(10)## and had##sqrt(10) + sqrt(10)##. We would simply call it ##2sqrt(10)##.
$10.00 
Waiting for answer What is a fundamental niche?
The fundamental is the theoretical niche of an organism given that there are no limiting factors on the environment or resources the organism can use/inhabit. A fundamental niche i...
$10.00 
Waiting for answer What is a true nucleus?
It is enclosed in a nuclear membrane. get their name because they have a "true" nucleus. The genetic material() in Eukaryotes are stored in the Nucleus and it is wrapped by a membran...
$10.00 
Waiting for answer How do you find the area of irregular objects?
See below. There are two types of irregular object shapes. Where the original shape can be converted in regular shapes with where measurements of each side are given. As shown in...
$10.00 
Waiting for answer How do you integrate ##sqrt(x^225)/x##?
You must apply ##x=5/costheta## and do the mathematics step by step. This integral does not seem solvable by other techniques, e.g. integration by part, just integration by trigono...
$10.00 
Waiting for answer How to draw lewis structure F2?
Here's how you can do that. The first thing to do here is determine the total number of you have in a fluorine molecule, ##"F"_2##. The fluorine molecule is composed of two fluorin...
$10.00 
Waiting for answer Does the Big Bang Theory explain how the earth was formed?
No theory explains how the universe came into existence. There are several theories as to how formed. My favourite one is that every planet started off as a gas giant, but the ter...
$10.00 
Waiting for answer What are 3 properties of bases?
Following are the properties of bases : 1 ) Bases conduct an electric current. 2 ) Bases have Usually no smell (except NH3! ) 3 ) Bases are substances which will restore the original blue color of the most of the acids
$10.00 
Waiting for answer Naturally occurring europium (Eu) consists of two isotopes w...
The of europium is 152 u. Method 1 Assume that you have 10 000 atoms of Eu. Then you have 4803 atoms of ##""_63^151"Eu"## and 5197 atoms of ##""_63^153"Eu"##. Mass of ##""_63^151"Eu"## = 4803 × 151 u = 725 253 u Mass of ##""_63^153"Eu"## = 5197 × 153 u = 795 141 u Mass of 10 000 atoms = 1 52...
$10.00 
Waiting for answer Why does the lack of ATP in muscle cells cause the muscles t...
Because ATP is used for relaxation of muscles, not the contraction. It is indeed quite counterintuitive, because ATP is always associated with 'action'. This is different for muscles...
$10.00