Search found 60 matches
- Thu Mar 14, 2019 6:10 pm
- Forum: Reaction Mechanisms, Reaction Profiles
- Topic: Reaction Profiles
- Replies: 1
- Views: 198
Reaction Profiles
Can someone please explain how to interpret a reaction profile graph for reactions with multi-step mechanisms? How can you determine which step of a mechanism is the fastest from the graph? Why do the dips represent the formation of intermediates? Why do the number of peaks represent the number of s...
- Thu Mar 14, 2019 5:58 pm
- Forum: Reaction Mechanisms, Reaction Profiles
- Topic: Initiating, Propagating, Terminating [ENDORSED]
- Replies: 1
- Views: 189
Initiating, Propagating, Terminating [ENDORSED]
Problem 7.29 in the seventh edition textbook asks us to determine whether the two steps in a suggested mechanism for the destruction of ozone by chlorofluorocarbons are initiating, propagating, or terminating. It also asks to write a chain terminating step for the reaction. What do the 3 terms mean ...
- Thu Mar 14, 2019 5:53 pm
- Forum: First Order Reactions
- Topic: Linear Plots
- Replies: 1
- Views: 252
Linear Plots
In the seventh edition textbook, problem 7.21 lists a number of plots and asks us to determine which are linear (for example, [A] vs t for a 0th order reaction in A is linear). The solutions manual states that the option (f). initial rate against [A] for a reaction that is first order in A, is linea...
- Sun Mar 10, 2019 6:55 pm
- Forum: First Order Reactions
- Topic: first order reactions examples
- Replies: 3
- Views: 406
Re: first order reactions examples
Radioactive decay is a first-order reaction since the decay rate is proportional to the initial amount of radioactive atoms present to the first power. They are proportional through a decay constant. Hope this was helpful!
- Sun Mar 10, 2019 6:23 pm
- Forum: Method of Initial Rates (To Determine n and k)
- Topic: 7th edition 7A. 17
- Replies: 3
- Views: 730
Re: 7th edition 7A. 17
The solutions manual's answer is in terms of moles instead of mmol (1 mmol = 1x10^-3 mol). They converted all the units from mmol to mol before solving for the units of k. Since the whole problem is in terms of mmol, I think you are okay leaving the answer in terms of mmol as well.
- Sun Mar 10, 2019 6:19 pm
- Forum: Method of Initial Rates (To Determine n and k)
- Topic: 7A.15
- Replies: 4
- Views: 452
Re: 7A.15
You do not consider C because when [A] and [B] are constant and [C] changes, the rate does not change. Thus you can conclude that the reactant C is zero order and the rate of the reaction is independent of [C] (and it does not show up in the rate law). Hope this helped!
- Sun Mar 03, 2019 6:07 pm
- Forum: Kinetics vs. Thermodynamics Controlling a Reaction
- Topic: Kinetics
- Replies: 7
- Views: 769
Re: Kinetics
In a concentration vs time graph of a reaction, the slope or derivative at a certain time is the rate of the reaction (how fast or slow a reaction proceeds), and kinetics is the study of the rates of chemical reactions. Initial rates of reactions can be calculated but it becomes more difficult the f...
- Sun Mar 03, 2019 6:02 pm
- Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
- Topic: Q
- Replies: 3
- Views: 357
Q
When using Q in the Nernst Equation, how come we are allowed to mix values for partial pressure and concentration of the products and reactants?
- Sun Mar 03, 2019 5:58 pm
- Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
- Topic: K Value
- Replies: 7
- Views: 758
K Value
Why is it that anytime the Nernst equation is used to solve for K, K is written with only one significant figure (for example: K = 1x103)?
- Sun Feb 24, 2019 8:18 pm
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: equilibruim based on enthalpy
- Replies: 3
- Views: 391
Re: equilibruim based on enthalpy
If the change in enthalpy is positive the reaction is endothermic (it requires heat to form products) and so raising the temperature will cause the equilibrium to shift toward the right (i.e., more product will be formed since more heat is available). If the change in enthalpy is negative the reacti...
- Sun Feb 24, 2019 8:11 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: SHE
- Replies: 3
- Views: 372
SHE
What is the standard hydrogen electrode? I thought electrodes were made of metal to conduct electricity, so what does it mean for the electrode to be hydrogen?
- Sun Feb 24, 2019 8:08 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Current, Charge, Potential, Volt
- Replies: 1
- Views: 207
Current, Charge, Potential, Volt
Can someone please explain the difference between current, charge, volt, and potential? I am having a hard time understanding what they all mean.
- Thu Feb 14, 2019 3:31 pm
- Forum: Gibbs Free Energy Concepts and Calculations
- Topic: Stability
- Replies: 3
- Views: 366
Stability
I need help thinking through how a raise in temperature affects the stability of compounds with respect to their elements. I know you can use the G f and H f of the compound to solve for the -TdeltaS f term in the gibbs free energy equation, and that if T increases than the whole -TdeltaS f term inc...
- Thu Feb 14, 2019 3:15 pm
- Forum: Gibbs Free Energy Concepts and Calculations
- Topic: gibbs free energy
- Replies: 10
- Views: 898
Re: gibbs free energy
If it is negative, the reaction is spontaneous.
- Thu Feb 14, 2019 3:10 pm
- Forum: Concepts & Calculations Using First Law of Thermodynamics
- Topic: 6th ed 8.101
- Replies: 1
- Views: 287
Re: 6th ed 8.101
Since you have a reaction you can use the enthalpies of formation of the products and reactants to find the reaction enthalpy. Look up the enthalpies of formation for both SO3 and SO2 and then multiply them by their molar coefficients from the reaction. Then subtract the enthalpy of formation for SO...
- Thu Feb 07, 2019 4:40 pm
- Forum: Thermodynamic Systems (Open, Closed, Isolated)
- Topic: Enthalpy and Entropy
- Replies: 2
- Views: 1062
Re: Enthalpy and Entropy
Enthalpy is heat released or absorbed in chemical reactions and physical changes. Entropy, on the other hand, is needed to describe the likelihood of a system being in a particular state. The textbook refers to entropy as a measure of disorder within a system, although Dr. Lavelle has decided to avo...
- Thu Feb 07, 2019 4:15 pm
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: Change in Internal Energy
- Replies: 1
- Views: 319
Re: Change in Internal Energy
The reference point affects the sign of q: q (cal) = -q. The experiments were conducted in the calorimeter so the heat capacity of the calorimeter must be calculated (which is calculated from the first reaction that was used to calibrate the calorimeter). The equation for this is C (cal&...
- Thu Feb 07, 2019 4:03 pm
- Forum: Calculating Standard Reaction Entropies (e.g. , Using Standard Molar Entropies)
- Topic: Statistical vs Residual Entropy
- Replies: 4
- Views: 583
Statistical vs Residual Entropy
Can someone explain statistical entropy and how it differs from residual entropy? Dr. Lavelle's lecture slides indicated that statistical entropy had a large error in W. What does that mean in this context?
- Sun Feb 03, 2019 5:09 pm
- Forum: Phase Changes & Related Calculations
- Topic: Work by expansion
- Replies: 3
- Views: 374
Work by expansion
The work by expansion equation gives an answer in the units atm * L not J or kJ (the unit used for work). How do you convert atm * L to J?
- Sun Feb 03, 2019 5:01 pm
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: Reversible reaction
- Replies: 1
- Views: 218
Reversible reaction
In class, Dr. Lavelle talked about the small fluctuations in volume that occur when a system is at equilibrium, and how the sum of these infinitesimal changes contribute to reversible reactions doing more work than irreversible reactions. However, how do these infinitesimal changes in volume occur i...
- Sun Feb 03, 2019 4:51 pm
- Forum: Phase Changes & Related Calculations
- Topic: Heating and Cooling Curve
- Replies: 2
- Views: 346
Re: Heating and Cooling Curve
Yes, the cooling curve is the heating curve but in the opposite direction (going from right to left). Temperature is on the y-axis, so reading a heating curve from right to left shows a decrease in temperature which shows the cooling process. Hope this helped!
- Sun Feb 03, 2019 4:51 pm
- Forum: Phase Changes & Related Calculations
- Topic: Heating and Cooling Curve
- Replies: 2
- Views: 346
Re: Heating and Cooling Curve
Yes, the cooling curve is the heating curve but in the opposite direction (going from right to left). Temperature is on the y-axis, so reading a heating curve from right to left shows a decrease in temperature which shows the cooling process. Hope this helped!
- Sun Jan 27, 2019 12:45 pm
- Forum: Phase Changes & Related Calculations
- Topic: State Property
- Replies: 3
- Views: 351
State Property
Can someone please explain what it means for a state property to be independent of the path taken to obtain that state? I understand state properties are only concerned with the current state of a substance, but what does the "path taken" refer to? Would that have to do with heating, cooli...
- Sun Jan 27, 2019 12:39 pm
- Forum: Phase Changes & Related Calculations
- Topic: Relationship between heat and work
- Replies: 2
- Views: 272
Re: Relationship between heat and work
Heat and work are two ways in which energy can be transferred. The more energy a system has, the greater is capacity to do work and the more heat it can produce. Hope this was helpful!
- Sun Jan 27, 2019 12:34 pm
- Forum: Phase Changes & Related Calculations
- Topic: closed vs isolated system
- Replies: 3
- Views: 801
Re: closed vs isolated system
A closed system has a fixed amount of matter and can exchange energy with its surroundings. An example would be a cold pack that it used for athletic injuries since it absorbs heat from its surroundings to become cold. An isolated system can exchange neither matter nor energy with its surroundings a...
- Sun Jan 20, 2019 12:02 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: reaction of AlCl3
- Replies: 1
- Views: 73
reaction of AlCl3
Hi. The problem 6D.15 part (b) asks to calculate the pH of 0.055M AlCl3. I was confused on how to set up a reaction since hydrogen isn't a part of AlCl3. The solutions manual sets up the following reaction: Al(H2O)6^+3(aq) + H2O(l) <---> H3O^+3(aq) + Al(H2O)5^+2(aq). I understand why the AlCl3 had t...
- Sun Jan 20, 2019 11:51 am
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: 6C.7 7th Edition
- Replies: 1
- Views: 161
Re: 6C.7 7th Edition
Use the formula Ka*Kb = Kw to convert all to Ka values. Then compare the values: the smaller the value, the weaker the acid. Hope this helped!
- Sun Jan 20, 2019 11:48 am
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: 5I.27 in 7th edition
- Replies: 1
- Views: 184
Re: 5I.27 in 7th edition
I also ran into the same problem. However, using the value 0.07379 from my calculation, the equilibrium concentrations come out the same as those in the solutions manual. The discrepancy is taken care of by rounding and sig figs.
- Sat Jan 12, 2019 4:53 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: ICE table calculation
- Replies: 2
- Views: 223
Re: ICE table calculation
Pure solids and liquids are not included when doing an ICE table calculation. Their concentrations do not change, and if they do, the change is so minimally it is insignificant anyway. Hope this was helpful!
- Sat Jan 12, 2019 4:43 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Solving for x in ICE table
- Replies: 2
- Views: 275
Re: Solving for x in ICE table
Multiply the right hand of the equation out. Doing so gives you 2x=3.60x10^-4 - 3.16x10^-3x (multiply 3.16x10^-3 in the first parenthesis with both terms in the second parenthesis). To solve for x add the 3.16x10^-3x from the right hand side of the equation to the 2x on the left. This gives you 2.00...
- Sat Jan 12, 2019 4:33 pm
- Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
- Topic: "quick" way to solve changes in pressure
- Replies: 3
- Views: 262
Re: "quick" way to solve changes in pressure
Concentration is equal to moles/liters. By decreasing the volume by compression (decreasing liters), the concentration of the substances is increased (since the amount of moles are initially constant before the equilibrium adjusts). To adjust, the equilibrium will shift in the direction of the least...
- Tue Dec 04, 2018 5:08 pm
- Forum: Naming
- Topic: writing formulas
- Replies: 2
- Views: 179
writing formulas
Can someone please explain why water is sometimes written after the ligand in a formula (in alphabetical order) and sometimes before (not in alphabetical order)? For example, in the 7th edition textbook in section 9C, problem 3 asks you to write the formula of the coordination compound given the nam...
- Tue Dec 04, 2018 5:02 pm
- Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
- Topic: Dilution
- Replies: 1
- Views: 177
Dilution
Many homework problems ask you to determine the pH of a solution before and after it was diluted to fill a larger volume. Can someone please explain why you must multiply [H30+] by (initial volume/volume after dilution)?
- Tue Dec 04, 2018 4:54 pm
- Forum: Bronsted Acids & Bases
- Topic: Negative pH
- Replies: 1
- Views: 264
Negative pH
In the seventh edition textbook, problem 9 in section 6B asks you to determine [H30+], [OH-], pH, and pOH given just one of these things. For one of the problems the [H30+] given is 1.5 mol/L and thus the pH = -log(1.5) = -0.18. The solutions manual uses this value for pH but disregards the negative...
- Tue Nov 27, 2018 4:26 pm
- Forum: Sigma & Pi Bonds
- Topic: Sigma vs. Pi
- Replies: 11
- Views: 1663
Re: Sigma vs. Pi
A single bond is made up of one sigma bond. A double bond is made up of one sigma bond and one pi bond. A triple bond is made up of one sigma bond and two pi bonds. All bonds will have at least one sigma bond and then depending on whether it is a single, double, or triple bond it will have either no...
- Tue Nov 27, 2018 4:23 pm
- Forum: Bond Lengths & Energies
- Topic: Comparing Bond Lengths of Diff Molecules/Ions
- Replies: 1
- Views: 376
Re: Comparing Bond Lengths of Diff Molecules/Ions
The bond lengths in SO3^2- are not the same. The most stable structure has one double bond and 2 single bonds. However, SO3^2- has resonance and thus the actual SO bond length in this molecule is not determined by any one individual bond but rather a blend of all 3. Thus the SO bond length in SO3^2-...
- Tue Nov 27, 2018 4:12 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Homework help: Polar vs Nonpolar
- Replies: 1
- Views: 149
Re: Homework help: Polar vs Nonpolar
The solutions manual correctly states that b is non-polar and that d is polar. Try taking another look!
- Mon Nov 19, 2018 5:17 pm
- Forum: Hybridization
- Topic: Molecular Shape & Hybridization
- Replies: 4
- Views: 351
Re: Molecular Shape & Hybridization
The number of hybridized orbitals of any one atom is the same as the number of regions of electron density around the atom. This regions of electron density give us the electron arrangement which is different than the molecular shape (molecular shape does not take lone pairs into consideration). Thu...
- Mon Nov 19, 2018 4:51 pm
- Forum: Hybridization
- Topic: Problem 4.33
- Replies: 1
- Views: 161
Re: Problem 4.33
To solve problems such as this one, draw the lewis structure of the compounds and then from there you can deduce how many regions of electron density surround the atom in boldface. The total number of regions of electron density will be the hybridization of the atom. For example if there are 5 regio...
- Mon Nov 19, 2018 4:47 pm
- Forum: Hybridization
- Topic: Labeling Compounds
- Replies: 4
- Views: 346
Re: Labeling Compounds
There is an understood 1 after the s in the sp3 hybridization of methane (s1p3). Methane has four regions of electron density and uses 1 s-orbital and 3 p-orbitals, making a total of 4 hybridized orbitals. Thus, compounds or molecules with 4 regions of electron density (such as methane) have an sp3 ...
- Wed Nov 14, 2018 10:40 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Bond Angles
- Replies: 3
- Views: 304
Re: Bond Angles
Molecules that have lone pair electrons on the central atom will have bond angles that are slightly less than the value they would be if the lone pair were a bonded atom. The reason for this is that repulsion of a lone pair of electrons is greater than the repulsion of a bonding pair, thus the lone ...
- Wed Nov 14, 2018 7:22 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Radicals
- Replies: 1
- Views: 213
Radicals
Does a single electron on a radical count as an area of electron density as much as an electron pair counts? Is the repulsion less for a single electron than for a pair, and does this mean that the bond angles of a molecule with a single electron will be slightly larger than the bond angles of a mol...
- Wed Nov 14, 2018 7:14 pm
- Forum: Polarisability of Anions, The Polarizing Power of Cations
- Topic: polarizing power
- Replies: 2
- Views: 312
Re: polarizing power
Anions do have polarizing power. The trend is that that larger, less electronegative anions will have a greater polarizing power. For cations the trend is that smaller, more highly charged cations have more polarizing power. Hope this helps!
- Thu Nov 08, 2018 5:41 pm
- Forum: Dipole Moments
- Topic: Permanent Dipole Moments
- Replies: 4
- Views: 3996
Re: Permanent Dipole Moments
Permanent Dipole Moments occur when the difference in the electronegativity of two atoms in a molecule is large. The more electronegative atom will attract more electrons, thus creating a partial negative charge around that atom and a partial positive charge around the atom with the lower electroneg...
- Thu Nov 08, 2018 1:36 pm
- Forum: Lewis Structures
- Topic: Mystery Element
- Replies: 4
- Views: 552
Re: Mystery Element
The center atom will be the atom with the lowest ionization energy. Ionization energy increases as you go across from left to right on the periodic table and decreases as you go down a group. Hope this was helpful!
- Thu Nov 08, 2018 1:33 pm
- Forum: Polarisability of Anions, The Polarizing Power of Cations
- Topic: Electronegativity
- Replies: 6
- Views: 677
Re: Electronegativity
Chlorine is more electronegative because it has more protons and thus exerts a stronger pull for electrons (the effective nuclear charge is greater than that of Oxygen). Additionally, Chlorine is only one electron away from completing its octet while Oxygen needs two electron to complete its octet, ...
- Sun Nov 04, 2018 2:44 pm
- Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
- Topic: Problem 1A #15 (7th edition book)
- Replies: 1
- Views: 419
Re: Problem 1A #15 (7th edition book)
The value .112 is equal to 1/n2^2. By rearranging the formula: frequency (v) = R(1/n1^1 - 1/n2^2) we get 1/n2^2 = 1/n1^1 - v/R. Thus, 1/n1^1 - v/R = .112 which is what you solved for. You can write 1/n2^2 = .112 and so 1/.112 =n2^2. 1/.112 is approximately 9 so we can say n2^2 = 9 and thus n2 = 3. H...
- Sun Nov 04, 2018 2:31 pm
- Forum: Heisenberg Indeterminacy (Uncertainty) Equation
- Topic: Test 2 question
- Replies: 1
- Views: 305
Re: Test 2 question
Oxygen is diatomic so the O2 molecule has a molar mass of 32.00g/mol (twice the amount of O which is 16.00g). Since the problem refers to 1 molecule of Oxygen (not a mole of Oxygen), then you need to figure out the weight of 1 molecule of Oxygen. To do this you can use dimensional analysis: 32.00 g ...
- Sun Nov 04, 2018 2:16 pm
- Forum: Lewis Structures
- Topic: Formal Charge
- Replies: 2
- Views: 232
Formal Charge
Problem 5 a) on chapter 2C 7th edition: the problem calls for you to draw the lewis structure for ClO. The solutions manual shows it drawn with a single bond, but I was wondering why it would be incorrect to draw the structure with a double bond instead (since the formal charge would then be 0 for b...
- Wed Oct 24, 2018 11:07 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: Electron Configurations
- Replies: 3
- Views: 284
Re: Electron Configurations
The shell n=3 is lower in energy than the shell n=4 and thus it is written first to get the lowest energy configuration. The shells in the configuration should be in order of numerical value (which makes sense because it is in order of increasing energy). Since the d-block is included after Argon, a...
- Tue Oct 23, 2018 8:31 pm
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: Electron Configurations
- Replies: 2
- Views: 160
Electron Configurations
In class, Dr. Lavelle mentioned that Copper and Chromium are strange exceptions and they fill up (or half fill up) their d-subshell before the s-subshell because that is the configuration with the lowest energy. I was wondering if this also applies to Ag and Mo as well? Thank you!
- Tue Oct 23, 2018 7:09 pm
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: Electron Configurations
- Replies: 2
- Views: 1969
Electron Configurations
I am trying to do the electron configuration for W. Since W is in a row that breaks into the f block I was wondering where I would write the f-electrons. Would they come before or after the d-electrons in an electron configuration? So far I have it written as: [Xe]6s2 5d4 4f14 Is this correct? If no...
- Wed Oct 17, 2018 10:27 pm
- Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
- Topic: Bohr Formula
- Replies: 4
- Views: 455
Re: Bohr Formula
Use the formula when you are asked to calculate an electron's change in energy when it transitions from different energy levels (e.g. n=4 to n=2). You can also use the change in energy to calculate the frequency and wavelength of the light emitted due to the loss of energy when an electron transitio...
- Wed Oct 17, 2018 7:52 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: Nodes
- Replies: 1
- Views: 90
Nodes
Hi. I have a pretty clear understanding of what nodal planes are but I am confused as to what nodes are. Are they the same as nodal planes or are as lobes, or are they something completely different?
- Thu Oct 11, 2018 6:13 pm
- Forum: Properties of Light
- Topic: HW Question 1.27 (6th edition)
- Replies: 1
- Views: 154
Re: HW Question 1.27 (6th edition)
The question states that the lamp is rated 32W meaning 32J of energy are emitted every second. In 2 seconds 64 J of energy would be emitted by the lamp. Solve for the frequency using the speed of light and lambda and then use the frequency in the formula E=hv to calculate the energy per photon. Sinc...
- Thu Oct 11, 2018 6:06 pm
- Forum: Heisenberg Indeterminacy (Uncertainty) Equation
- Topic: Uncertainty in Kinetic energy of electron [ENDORSED]
- Replies: 2
- Views: 454
Uncertainty in Kinetic energy of electron [ENDORSED]
I am very confused as to what is meant when a problem asks you to find the uncertainty in the kinetic energy of an electron. I have solved for the uncertainty in velocity using the Heisenberg equation and the question is asking me to use it to find the uncertainty in the kinetic energy of the electr...
- Wed Oct 10, 2018 5:01 pm
- Forum: *Shrodinger Equation
- Topic: Wavefunction
- Replies: 3
- Views: 414
Wavefunction
I know that wavefunctions describe the distribution of an electron in an atom but I am having trouble understanding that concept. For one, why is it called a wavefunction and does it have anything to do with an atom's energy levels?
- Thu Oct 04, 2018 1:49 pm
- Forum: Accuracy, Precision, Mole, Other Definitions
- Topic: Polyatomic ions
- Replies: 3
- Views: 197
Re: Polyatomic ions
From my understanding, polyatomic ions are just one of those things you have to memorize. Once you use them enough you will become very familiar with them. I would suggest memorizing them as you come across them, and the more you are asked to use them in problems the easier they will become. Also, p...
- Thu Oct 04, 2018 1:41 pm
- Forum: Empirical & Molecular Formulas
- Topic: F5 (6TH EDITION)
- Replies: 5
- Views: 521
Re: F5 (6TH EDITION)
You would need to find the mass composition of each element and then convert those to percentages based on the entire mass of the compound. For example, the mass of C in the compound is 84.077g. To find the mass percent composition of C in the compound divide the mass of C in the compound by the tot...
- Thu Oct 04, 2018 1:31 pm
- Forum: SI Units, Unit Conversions
- Topic: Grams to atom Conversions [ENDORSED]
- Replies: 1
- Views: 179
Grams to atom Conversions [ENDORSED]
I know that to determine the amount of formula units in a compound, but I am having a hard time understanding the difference between molecules or atoms and formula units. How would you know when to use which terminology?