Search found 75 matches

by Taha 2D
Sun Feb 21, 2021 11:41 pm
Forum: Balancing Redox Reactions
Topic: Oxidizing vs Reducing
Replies: 47
Views: 103

Re: Oxidizing vs Reducing

its best to think of them as opposites as in a reducing agent gets oxidized and vice versa
by Taha 2D
Sun Feb 21, 2021 11:40 pm
Forum: Balancing Redox Reactions
Topic: Reducing vs oxidizing agents
Replies: 16
Views: 38

Re: Reducing vs oxidizing agents

just think of them as doing the opposite. a reducing agent reduces by getting oxidized and vice versa
by Taha 2D
Sun Feb 21, 2021 11:39 pm
Forum: Concepts & Calculations Using Second Law of Thermodynamics
Topic: State functions
Replies: 13
Views: 29

Re: State functions

yes they are. A good way to remember them is if you can carry out their calculations by just doing final - intial
by Taha 2D
Sun Feb 21, 2021 11:37 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: Thermodynamically Stable or Unstable
Replies: 8
Views: 23

Re: Thermodynamically Stable or Unstable

It is unstable if the gibbs free energy is positive
by Taha 2D
Sun Feb 21, 2021 11:36 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: Gas Constant R
Replies: 41
Views: 64

Re: Gas Constant R

it depends on the units you used to solve the question. the two options are R= 8.314 J/mol.K or R= 008206 L.atm/mol.K
by Taha 2D
Sun Feb 21, 2021 11:34 pm
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: closed system energy change
Replies: 11
Views: 38

Re: closed system energy change

No they are different but Both contribute to the internal energy of a system
by Taha 2D
Mon Feb 15, 2021 12:07 am
Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
Topic: Isothermal Reactions
Replies: 26
Views: 52

Re: Isothermal Reactions

the constant temp would mean it is reversible
by Taha 2D
Mon Feb 15, 2021 12:07 am
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: Free Energy
Replies: 41
Views: 127

Re: Free Energy

a state function is one in which the pathway of the energy is not important, rather where it begins and ends
by Taha 2D
Sun Feb 14, 2021 11:46 pm
Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
Topic: isochoric / isometric
Replies: 9
Views: 19

Re: isochoric / isometric

it refers to reactions in which volume is kept constant
by Taha 2D
Sun Feb 14, 2021 11:43 pm
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: Temperature and K
Replies: 14
Views: 34

Re: Temperature and K

K is a unit of temperature known as kelvin. K in equilibria is effected by temp as in an endothermic reaction increasing the heat will favor the product and the other way around for exothermic
by Taha 2D
Sun Feb 14, 2021 11:40 pm
Forum: Concepts & Calculations Using First Law of Thermodynamics
Topic: Kelvin conversion
Replies: 40
Views: 85

Re: Kelvin conversion

you can use either +273 or +273.15
by Taha 2D
Sun Feb 07, 2021 11:59 pm
Forum: Administrative Questions and Class Announcements
Topic: exam review
Replies: 6
Views: 19

Re: exam review

ya any ta can pull up ur exam questions
by Taha 2D
Sun Feb 07, 2021 11:58 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: Cv and cp
Replies: 7
Views: 19

Re: Cv and cp

CV is the amount of heat energy that a substance absorbs or releases (per unit mass) with the change in temperature where a volume change does not occur. cp is the same but when the pressure does not change. the formula relating them would be CP – CV = R
by Taha 2D
Sun Feb 07, 2021 11:55 pm
Forum: Entropy Changes Due to Changes in Volume and Temperature
Topic: Entropy Concept
Replies: 5
Views: 13

Re: Entropy Concept

The entropy of an object is a measure of the amount of energy which is unavailable to do work. Entropy is also a measure of the number of possible arrangements the atoms in a system can have. In this sense, entropy is a measure of uncertainty or randomness. So every reaction is increasing entropy no...
by Taha 2D
Sun Feb 07, 2021 11:52 pm
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: Work
Replies: 39
Views: 99

Re: Work

when the system is providing energy to the surroundings it is negative as energy is essentially lost from the system, its positive when the surroundings do work on the system.
by Taha 2D
Sun Feb 07, 2021 11:50 pm
Forum: Phase Changes & Related Calculations
Topic: Midterm Q4
Replies: 7
Views: 142

Re: Midterm Q4

since hbr is a strong acid it means that the Br- ion disassociates completely and thus does not effect h30 or oh concentrations meaning ph is unchanged
by Taha 2D
Sun Jan 10, 2021 5:39 pm
Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
Topic: Counting Moles
Replies: 11
Views: 67

Re: Counting Moles

1 mole on the left and 2 on the right because only gases are counted
by Taha 2D
Sun Jan 10, 2021 5:37 pm
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: Water
Replies: 28
Views: 133

Re: Water

it is included if its in the gaseous state
by Taha 2D
Sun Jan 10, 2021 5:36 pm
Forum: Ideal Gases
Topic: Units of Temperature
Replies: 82
Views: 348

Re: Units of Temperature

kelvin is used
by Taha 2D
Sun Jan 10, 2021 5:35 pm
Forum: Ideal Gases
Topic: Kc vs Kp
Replies: 109
Views: 989

Re: Kc vs Kp

if everything (rectants/products) are in gaseous states then KP is used, otherwise KC
by Taha 2D
Sun Jan 10, 2021 5:34 pm
Forum: Student Social/Study Group
Topic: Chemistry Community
Replies: 29
Views: 114

Re: Chemistry Community

Its up to your TA, some take points per week(5 before sunday midnight) and some look at your total posts
by Taha 2D
Sat Dec 12, 2020 2:39 pm
Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
Topic: Textbook 6C19
Replies: 4
Views: 40

Re: Textbook 6C19

Hbr is stronger because the bond length is longer
hclo2 after drawing the lewis you will notice the bond is cl-o-h and the cl is more electronegative than br so the h is more easily disassociated.
by Taha 2D
Sat Dec 12, 2020 1:55 pm
Forum: Bronsted Acids & Bases
Topic: determining cations or anions
Replies: 4
Views: 43

Re: determining cations or anions

You can tell it is basic because the cation is Na and that is a specatator ion. the proton transfer is just the anion pulling a hydrogen from water and leaving OH-
by Taha 2D
Sat Dec 12, 2020 1:53 pm
Forum: Bronsted Acids & Bases
Topic: Bronsted vs Lewis Acids and Bases
Replies: 8
Views: 60

Re: Bronsted vs Lewis Acids and Bases

lewis acids are e- acceptors, bronsted are proton donators
lewis bases are e- donors, and bronsted bases are proton acceptors
all bronsted are lewis but not the other way around
by Taha 2D
Sat Dec 12, 2020 1:51 pm
Forum: Conjugate Acids & Bases
Topic: classifying acids and bases
Replies: 2
Views: 34

Re: classifying acids and bases

KCl, LiBr are neutral
k2s03 and na2s are basic
nh4br is acidic
by Taha 2D
Fri Dec 11, 2020 12:25 pm
Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
Topic: Sapling #5
Replies: 5
Views: 65

Re: Sapling #5

10^-ph
by Taha 2D
Sun Dec 06, 2020 1:32 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Coordination Number Question
Replies: 12
Views: 127

Re: Coordination Number Question

just look at whats inside the square brackets. the numbers of atoms/molecules connected to the tm cation indicate coordination number.
by Taha 2D
Sun Dec 06, 2020 11:47 am
Forum: Hybridization
Topic: How to simply determine hybridization
Replies: 27
Views: 214

Re: How to simply determine hybridization

number of electron density= number of hybrid orbitals
3 densities=sp2
4 densities= sp3
5 densities = sp3d
6= sp3d2
by Taha 2D
Sun Dec 06, 2020 11:41 am
Forum: Shape, Structure, Coordination Number, Ligands
Topic: ligands
Replies: 11
Views: 89

Re: ligands

Calculating individual formal charges will show it to be neutral
by Taha 2D
Sun Dec 06, 2020 11:38 am
Forum: Amphoteric Compounds
Topic: Amphoteric
Replies: 11
Views: 210

Re: Amphoteric

When a compound is amphoteric, it means it has both basic and acidic character. Thus, when the compound reacts with an acid, it shows that it's basic. When it reacts with a base, it shows that it's acidic. When a compound is amphiprotic, it means it can act as a proton donor and as a proton acceptor.
by Taha 2D
Sun Dec 06, 2020 11:35 am
Forum: Determining Molecular Shape (VSEPR)
Topic: Memorizing shapes based on general formula?
Replies: 5
Views: 44

Re: Memorizing shapes based on general formula?

For shapes you should just know the shapes according to the number of electron densities. And yes to be safe know the bond angles as i doubt there will be a chart (in the lectures he mentioned you should be able to figure out which shape will have larger/smaller angles which can be deduced but its h...
by Taha 2D
Sun Dec 06, 2020 11:29 am
Forum: Biological Examples
Topic: Hemoglobin vs. Myoglobin
Replies: 29
Views: 252

Re: Hemoglobin vs. Myoglobin

Myoglobin is a protein found in muscle tissues and it acts as a reservoir for oxygen. Hemoglobin is made up of 4 heme groups which are like myoglobin as they carry oxygen.
by Taha 2D
Sun Dec 06, 2020 11:21 am
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Coordinate Covalent Bond
Replies: 6
Views: 78

Re: Coordinate Covalent Bond

the ligand donates both electrons thus its a coordinate covalent bond with the tm cation
by Taha 2D
Sun Dec 06, 2020 11:19 am
Forum: Lewis Acids & Bases
Topic: Bronsted vs. Lewis bases
Replies: 11
Views: 73

Re: Bronsted vs. Lewis bases

yes they are the same as one is an electron donor(lewis) and the other a proton acceptor(bronsted) which is basically the same thing. All Bronsted acids are lewis base but the reverse isn't true.
by Taha 2D
Sun Nov 29, 2020 11:40 pm
Forum: Ionic & Covalent Bonds
Topic: Polar and Nonpolar
Replies: 28
Views: 196

Re: Polar and Nonpolar

Depends on their shape as well and if the dipoles cancel or not
by Taha 2D
Sun Nov 29, 2020 11:39 pm
Forum: Hybridization
Topic: How to find the hybridization
Replies: 14
Views: 97

Re: How to find the hybridization

The number of regions of electron density = hybrid orbitals needed. 3= sp2, 4=sp3,
by Taha 2D
Sun Nov 29, 2020 11:36 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: finding the shape of a molecule
Replies: 6
Views: 42

Re: finding the shape of a molecule

the VSEPR model is used to determine the shape
by Taha 2D
Sun Nov 29, 2020 11:33 pm
Forum: Hybridization
Topic: Sigma and Pi bonds
Replies: 21
Views: 184

Re: Sigma and Pi bonds

Sigma and pi bonds are chemical covalent bonds. Sigma and pi bonds are formed by the overlap of atomic orbitals. Sigma bonds are formed by end-to-end overlapping and Pi bonds are when the lobe of one atomic orbital overlaps another. Sigma bonds are usually stronger but you can only have one sigma bo...
by Taha 2D
Sun Nov 29, 2020 11:27 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Tetrahedral molecular shape
Replies: 10
Views: 99

Re: Tetrahedral molecular shape

for the first two cases thats the structure which allows them to be the furthest apart. With 4 there are shapes which can maximize the distance between the atoms which is caused by the unique repulsion between the atoms(tetrahedral which is 109.5 which is greater that 90).
by Taha 2D
Sun Nov 29, 2020 11:24 pm
Forum: Sigma & Pi Bonds
Topic: Pi and Sigma bonds
Replies: 4
Views: 52

Re: Pi and Sigma bonds

sigma bonds are single bonds. You can only have one sigma bond. Sigma bonds have symmetrical electron densities allowing rotation of atoms which are bonded and share electrons through end to end overlapping along the internuclear axis. Pi bonds have a central node where there is no electron density ...
by Taha 2D
Sun Nov 29, 2020 11:19 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Delocalized pi bond?
Replies: 4
Views: 55

Re: Delocalized pi bond?

An example to explain is benzene. When sp2 hybridization takes place a p orbital is left on the carbon. In benzene when theres a ring of carbons each with a p orbital which overlap each other a molecular orbit is formed. The electrons can travel through these orbits which span the width of the molec...
by Taha 2D
Sun Nov 29, 2020 11:07 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Equatorial vs. Axial
Replies: 4
Views: 47

Re: Equatorial vs. Axial

Axial bonds alternate up and down, and are shown "vertical". Equatorial groups are approximately horizontal, but actually somewhat distorted from that, so that the angle from the axial group is a bit more than a right angle
by Taha 2D
Sun Nov 29, 2020 11:05 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: polar v nonpolar molecules
Replies: 30
Views: 177

Re: polar v nonpolar molecules

Polar molecules occur when there is an electronegativity difference between the bonded atoms. Nonpolar molecules occur when electrons are shared equal between atoms of a diatomic molecule or when polar bonds in a larger molecule cancel each other out.
by Taha 2D
Sun Nov 22, 2020 9:46 pm
Forum: Trends in The Periodic Table
Topic: Ion Trends
Replies: 18
Views: 128

Re: Ion Trends

cations are smaller than their atoms(they lose their valence shell)
anions are larger than their atoms
size increases down the group and decreases across
by Taha 2D
Sun Nov 22, 2020 9:44 pm
Forum: Formal Charge and Oxidation Numbers
Topic: Lewis acids and bases
Replies: 22
Views: 133

Re: Lewis acids and bases

best way to see the difference is that a lewis acid accepts electrons while a lewis base donates them
by Taha 2D
Sun Nov 22, 2020 9:39 pm
Forum: Trends in The Periodic Table
Topic: Ionic Character
Replies: 11
Views: 94

Re: Ionic Character

its determined by the difference in electronegativity. generally if the difference is less than 0.5 then its non polar covalent, if its 0.5-2 then its covalent but with increasing ionic character, and if the difference is more than 2 then it can be considered ionic
by Taha 2D
Sun Nov 22, 2020 9:24 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Lone Pairs and Bonding Pairs
Replies: 6
Views: 39

Re: Lone Pairs and Bonding Pairs

lone pair electrons cause repulsion and change the shape of the molecule.
by Taha 2D
Sun Nov 22, 2020 9:23 pm
Forum: Lewis Structures
Topic: Lewis acids and bases
Replies: 23
Views: 128

Re: Lewis acids and bases

A lewis acid is an electron acceptor while a lewis base is a donater.
by Taha 2D
Sun Nov 22, 2020 9:22 pm
Forum: Dipole Moments
Topic: Dipole-Dipole
Replies: 10
Views: 46

Re: Dipole-Dipole

They both should have dipoles independant of each other and need to have a significant difference electronegativity to form dipole interactions.
by Taha 2D
Sun Nov 22, 2020 9:20 pm
Forum: Interionic and Intermolecular Forces (Ion-Ion, Ion-Dipole, Dipole-Dipole, Dipole-Induced Dipole, Dispersion/Induced Dipole-Induced Dipole/London Forces, Hydrogen Bonding)
Topic: London Dispersion
Replies: 33
Views: 178

Re: London Dispersion

They are always present as intermolecular forces but they arent significant unless they build up.
by Taha 2D
Mon Nov 16, 2020 6:35 pm
Forum: Properties of Light
Topic: Momentum of light
Replies: 6
Views: 100

Re: Momentum of light

Yuehan_Wu_3K wrote:The photon has a mass even though it's very small. It should not be ignored.

from what I've read online it seems that a photon doesnt have 'rest mass' because its never at rest but since it has energy it has mass. I guess i dont understand what rest mass refers too
by Taha 2D
Mon Nov 16, 2020 6:32 pm
Forum: Administrative Questions and Class Announcements
Topic: Missed chem community posts
Replies: 12
Views: 114

Re: Missed chem community posts

So I asked my TA and he said, 'For the chemistry community, you cannot make up points retroactively by posting more'
he said theres a max of 5 points per week
by Taha 2D
Sun Nov 15, 2020 6:30 pm
Forum: Administrative Questions and Class Announcements
Topic: Missed chem community posts
Replies: 12
Views: 114

Missed chem community posts

If I missed the first week or so of posts on chem community, can i make up for the points by posting additional posts?
by Taha 2D
Sun Nov 15, 2020 6:28 pm
Forum: Properties of Light
Topic: Momentum of light
Replies: 6
Views: 100

Momentum of light

I am confused as to how photons have momentum since they dont have a rest mass. (p=mv)
by Taha 2D
Sun Nov 15, 2020 6:23 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8753
Views: 1489603

Re: Post All Chemistry Jokes Here

Why should you never trust atoms??

because they make up everything!
by Taha 2D
Sun Nov 15, 2020 6:19 pm
Forum: Octet Exceptions
Topic: octet rule
Replies: 8
Views: 75

Re: octet rule

these arent octet electrons. in the case of an expanded octet a valence shell can hold more than 8 electrons if they have the subshells available(as in the case of sulfur in s03. to understand look at the periodic table. chlorine falls unders group 17 and period 3. n=3 means quantum number L can be ...
by Taha 2D
Sun Nov 15, 2020 6:09 pm
Forum: Ionic & Covalent Bonds
Topic: Difference on how atomic size affects covalent and dipole interactions
Replies: 9
Views: 46

Re: Difference on how atomic size affects covalent and dipole interactions

yes, increased distance from the nucleus means less electrostatic attraction from the protons. And for London dispersion forces the further the electrons are, the more freely they can move (higher polarizability) thus being able to create temporary dipoles with more ease. But keep in mind london dis...
by Taha 2D
Sun Nov 15, 2020 5:55 pm
Forum: Ionic & Covalent Bonds
Topic: Sapling Q: Hydrogen Bonds
Replies: 7
Views: 56

Re: Sapling Q: Hydrogen Bonds

hydrogen bonds occur between hydrogen and oxygen,nitrogen or fluorine.
by Taha 2D
Sun Nov 15, 2020 5:47 pm
Forum: Formal Charge and Oxidation Numbers
Topic: Spin State
Replies: 8
Views: 105

Re: Spin State

the way it was calculated is well beyond our scope but the experiment which found out about the number 1/2 is the Stern–Gerlach experiment(experiment with the deflected silver atoms discussed briefly in a lecture). Spin is known as intrinsic angular momentum and its not actually referring to particl...
by Taha 2D
Sun Nov 15, 2020 5:36 pm
Forum: Resonance Structures
Topic: bond length
Replies: 37
Views: 188

Re: bond length

We dont need to specific bond lengths but we should know that in resonance hybrid structures all bond lengths are equal(average of the different lengths) and the higher the electron density of the bond, the shorter the bond length
by Taha 2D
Sun Nov 08, 2020 6:55 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8753
Views: 1489603

Re: Post All Chemistry Jokes Here

Doctor: Your body has run out of magnesium
Me: 0mg
by Taha 2D
Sun Nov 08, 2020 6:48 pm
Forum: Ionic & Covalent Bonds
Topic: Chemical Bonds
Replies: 12
Views: 66

Re: Chemical Bonds

Double and triple bonds have more electrons, so they exert a stronger attractive force on the nuclei of the bonding atoms, which pulls the atoms closer together and leads to shorter bond lengths
by Taha 2D
Sun Nov 08, 2020 6:46 pm
Forum: Lewis Structures
Topic: Lewis Acid vs. Lewis Base
Replies: 5
Views: 44

Re: Lewis Acid vs. Lewis Base

Carbon dioxide is a polar molecule whose positive center is on the carbon atom: This positive center is able to attract (and accept) the lone electron pairs present on the oxide ion (O2-). Thus, carbon dioxide is acting as a Lewis acid and the oxide ion is acting as a Lewis base.
by Taha 2D
Sun Nov 08, 2020 6:36 pm
Forum: Trends in The Periodic Table
Topic: Calculating the charge of an element/molecule
Replies: 3
Views: 40

Re: Calculating the charge of an element/molecule

It depends on the imbalance of electrons and protons. For example Chlorine has 7 valence electrons and 7 protons. When it reacts with anything, Sodium for example it creates NaCl. That means sodium with 1 valence electron bonded ionically with chlorine by giving its valence electron away. This leave...
by Taha 2D
Sun Nov 08, 2020 6:30 pm
Forum: Trends in The Periodic Table
Topic: Elements that form Cations
Replies: 6
Views: 25

Re: Elements that form Cations

So metals(elements on the left side) are more likely to form cations ( positively charged ions) because of their number of valence electrons. The left hand side normally goes up till group 3 meaning they have upto 3 valence electrons. So all atoms are looking to form full valence shells. For metals ...
by Taha 2D
Sun Oct 18, 2020 6:03 pm
Forum: Balancing Chemical Reactions
Topic: Balancing Chemical Reactions Order
Replies: 31
Views: 268

Re: Balancing Chemical Reactions Order

theres no set order you have to follow but its the easiest to balance the elements which occur the least on both sides of the equation.
by Taha 2D
Sun Oct 18, 2020 6:01 pm
Forum: Significant Figures
Topic: Sig Figs
Replies: 5
Views: 42

Re: Sig Figs

significant figures are mainly used to calculate the uncertainty of the result you obtain. They shouldnt be varied in your calculations and throughout the question the same number of significant figures should be considered.
by Taha 2D
Sun Oct 18, 2020 5:52 pm
Forum: DeBroglie Equation
Topic: Names of equations
Replies: 8
Views: 39

Re: Names of equations

The equations are given but knowing them gives a big edge because you can immediately understand what needs to be used and its also a confidence booster.
by Taha 2D
Sun Oct 18, 2020 5:49 pm
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: Textbook Question 1A.13
Replies: 2
Views: 29

Re: Textbook Question 1A.13

1/wavelength= rydberg constant (1.0974*10^-7) * (1/2^2 - 1/1^2)
by Taha 2D
Sun Oct 18, 2020 5:41 pm
Forum: Properties of Electrons
Topic: Work function/Threshold Energy
Replies: 19
Views: 93

Re: Work function/Threshold Energy

They are the same thing and refer to the minimum energy required to excite an electron to the point it leaves the surface. Different substances have different values and if energy lower than the threshold is supplied nothing substantial will occur.
by Taha 2D
Mon Oct 12, 2020 12:31 am
Forum: Empirical & Molecular Formulas
Topic: Trouble with Sapling Question #8
Replies: 4
Views: 46

Re: Trouble with Sapling Question #8

I was having the same problem. Whenever the special text box shows up at the bottom and you are dealing with a molecular/emperical formula problem the keyboard won't let you type in the symbols for elements unless you type in caps.
by Taha 2D
Sun Oct 11, 2020 11:28 pm
Forum: Balancing Chemical Reactions
Topic: Fractions
Replies: 26
Views: 169

Re: Fractions

The convention is to make sure all the moles are whole numbers because it doesn't make sense to have quarter a mole or something of that sort.
by Taha 2D
Sun Oct 11, 2020 11:25 pm
Forum: Balancing Chemical Reactions
Topic: Balancing equations.
Replies: 35
Views: 772

Re: Balancing equations.

I personally like to balance the elements of which there are only one on both sides first and then proceed.
by Taha 2D
Sun Oct 11, 2020 11:17 pm
Forum: Significant Figures
Topic: What is the purpose of significant figures?
Replies: 11
Views: 119

Re: What is the purpose of significant figures?

They're important to uphold precision and accuracy but along with that it helps you keep track of your working because it is recommended to use the same sig figs as the given raw data. Along with that they're important when it comes to calculating the uncertainty of your final results.
by Taha 2D
Sun Oct 11, 2020 11:12 pm
Forum: Empirical & Molecular Formulas
Topic: Finding Empirical Formula
Replies: 10
Views: 100

Re: Finding Empirical Formula

Empirical formulas need to have a whole number of moles and thats why 1.33 moles had to be multiplied by 3. 3.99 is very close to 4 so it can be rounded up. And since we need to multiply one elements moles, we need to multiply every elements moles by 3.

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