ChemTeam: Grams to MolesIn chemistry, the mole is the standard measurement of amount. However ... There
are three steps to converting grams of a substance to moles . Determine how ... The Mole & Molar Mass - Answers - Molecular Weight - Moles to Grams

In chemistry, the mole is the standard measurement of amount. However,
balances DO NOT give readings in moles . Balances give readings in grams . So
the ... The Mole & Molar Mass - Answers - Molecular Weight - Moles to Grams

ChemTeam: Moles to GramsBalances DO NOT give readings in moles. So the problem is that, when we
compare amounts of one substance to another using moles, we must convert
from ...

Calculate the pH of a Saturated Solution When Given the KspPlease be aware that this problem does not require a concentration to be given in
the problem. We know the Ksp and we know the solution is saturated.

ChemTeam: Hess' Law - using bond enthalpiesCalculate (in kJ) the standard enthalpy change ΔH for the hydrogenation of
ethyne (acetylene) to ethane: H−C≡C−H( g ) + 2H2( g ) ---> H3C−CH3( g ). Bond ...

A review of Bronsted-Lowry Acid Base concepts - Chemteam.infoNH3 + H2O <===> NH4+ + OH¯. However, it is important to also consider the
reverse equation, since this is an equilibrium. In this case, note that HB+ is the
acid ...

ChemTeam: MolalityAs is clear from its name, molality involves moles. Boy, does it! The molality of a
solution is calculated by taking the moles of solute and dividing by the kilograms
...

ChemTeam: Molar VolumeIt is actually known to several more decimal places but the number above should
prove sufficient.This value has been known for about 200 years and it is not a ...

ChemTeam: Gas Law - Avogadro's LawAvogadro's Law . Return to KMT & Gas Laws Menu. Discovered by Amedo
Avogadro, of Avogadro's Hypothesis fame. The ChemTeam is not sure when, but
...

Converting between Units of Pressure: atm , mmHg and kPaOne atm . equals 760.0 mm Hg , so there will be a multiplication or division based
on the direction of the change. Example #1: Convert 0.875 atm to mmHg .

The Observable Properties of Acids and Bases - Chemteam.infoAcid Property #1: The word acid comes from the Latin word acere, which means "
sour." All acids taste sour. Well known from ancient times were vinegar, sour ...

ChemTeam: Kinetics: first-order chemical reactionsProblem #1: Calculate half- life for first-order reaction if 68% of a substance is ...
Assuming 0.0100 M, calculate the time in seconds required for the reaction to ...

ChemTeam: Hess' Law - using standard enthalpies of formationThe key to solving this problem is to have a table of standard enthalpies of
formation handy. In case you missed it, look at the equation up near the top and
see ...

ChemTeam: Henderson -Hasselbalch ProblemsReturn to a listing of many types of acid base problems and their solutions ...
Solution : 1) Substitute into the Henderson -Hasselbalch Equation and solve:.

Standard Enthalpy of Formation - ChemTeamThe standard enthalpy of formation for an element in its standard state is zero. ...
This is the physical state (solid, liquid , or gas ) that a substance would be in ...

ChemTeam: Gas Law - Boyle's LawOn the continent of Europe, this law is attributed to Edme Mariotte, therefore
those ... This equation of P1V1 = P2V2 will be very helpful in solving Boyle's Law
...

ChemTeam: Gas Law - Ideal Gas LawLet the cube root of k1k2k3k4k5 / k6 be called R . ... R is called the gas constant.
... 2.1025 grams is found to occupy 2.850 L at 22.0°C and 740.0 mmHg .

ChemTeam: The Mole & Molar MassAvogadro's Number has a unit associated with it. It is mol ¯ 1 , as in 6.022 x 1023
mol ¯ 1 . The superscripted minus one means the unit mol is in the denominator.

ChemTeam: Molecular WeightThe molecular weight of a substance is the weight in atomic mass units of all the
atoms in a given formula. An atomic mass unit is defined as 1/12 the weight of ...

ChemTeam: Hess' Law - using two equations and their enthalpiesThe enthalpy of a given chemical reaction is constant, regardless of the reaction
... This will put the C (s, diamond) on the product side, where we need it. Also ...

Metric Prefixes - ChemTeamIn order to properly convert from one metric unit to another, you must have the
prefixes ... Here is a number line with the two prefixes in problem sixteen marked:
.

Converting between Units of Pressure : atm, mmHg and kPaConverting between Units of Pressure : atm., mmHg and kPa. Return to KMT &
Gas ... There are three different units of pressure used in chemistry. This is an ...

Converting between Units of Pressure: atm, mmHg and kPaHere they are: atmospheres (symbol = atm); millimeters of mercury (symbol = mm
Hg ); Pascals (symbol = Pa) or, more commonly, kiloPascals (symbol = kPa ) ...

ChemTeam: Specific HeatThe specific heat is an important part of energy calculations since it tells you how
much energy is needed to move ... Here are the specific heat values for water : ...

Two Light Equations: Part Two - E = hν - ChemTeamProblem #2: How many Joules of energy are contained in a photon with λ = 550
nm? How many kJ /mol of energy is this? Solution: I will first do the problem step ...

ChemTeam: Nomenclature-Binary Compounds: StockBinary Compounds of Cations with Variable Charges. Given Formula, Write the
Name. The Stock System . Return to Nomenclature menu ...

ChemTeam: Calculating the Ksp from gram per 100 mL solubilitySometimes, the solubility is given in grams per 100 mL , rather than molar
solubility. The Ksp can still be calculated from these data, but indirectly. First, we
have ...

ChemTeam: How to Determine Specific HeatWe are going to determine the specific heat of copper metal. Now this has
already been done many times, so the value is available in reference books. We
will ...

ChemTeam: Balancing half-reactions in basic solutionReminder: a half - reaction MUST be balanced both for atoms and charge in order
to be correct. It is VERY easy to balance for atoms only, forgetting to check the ...

Given Name, Write the Formula - ChemTeamThat means, if you see a formula like BaSO4, the name is not barium monosulfur
tetraoxide. Another ... Example #4 - write the formula for sodium phosphate .

ChemTeam: Hess' Law - using three equations and their enthalpiesCalculate the standard enthalpy of formation of gaseous diborane (B2H6) using
the following .... Calculate the enthalpy change for the reaction below: ...

ChemTeam: Chemical NomenclatureTutorials and Problem Sets. Tutorials. Binary Compound (Metal/Nonmetal) with
Fixed Charge Cation. Given Formula, Write the Name · Given Name, Write the ...

ChemTeam: Converting between Celsius and KelvinIf you have a Celsius temperature in the problem, you MUST change it to Kelvin,
in order to use it in ... very often in gas law problems it looks like significant figure
rules are being violated. ... Last point: never, ever, use a degree sign on Kelvins.

Converting between Celsius and Kelvin . Return to KMT & Gas Laws Menu. There
are not any high school level gas law problems that the ChemTeam is aware ...

ChemTeam: Mixtures and Pure SubstancesA mixture is one in which two or more pure substances retain their chemical
identity. For example, if you dissolve some sugar into water, the sugar molecules
...

ChemTeam: Molar Heat of FusionSometimes the unit J/g is used. The first unit is technically the more correct unit to
use. The molar heat of fusion for water is 6.02 kJ/mol. Remember the value!

Calculate the frequency when given the wavelength - Chemteam.infoProblem #1a: Calculate the frequency of radiation with a wavelength of 442 nm.
Example #1b: The wavelength of an argon laser's output is 488.0 nm. Calculate ...

ChemTeam: Molar Heat of VaporizationKeep in mind the fact that this is a very specific value. It is only for one mole of
substance boiling. The molar heat of vaporization is an important part of energy ...

ChemTeam: Calculating gram per 100 mL solubility , given the KspBasically, this type of problem will (1) calculate the molar solubility from the Ksp.
Then, in an additional step, (2) calculate grams per liter from moles per liter.

ChemTeam: Half -Life Problems: Part One(1/2)number of half -lives is the decimal fraction which remains (1.000 is the
original starting amount, 0.500 at the end of ... 3) Os-182 has a half -life of 21.5
hours .

ChemTeam: Gas DensityDiscussing gas density is slightly more complex than discussing solid/liquid
density . Since gas volume is VERY responsive to temperature and pressure,
these ...

Redox menu - Chemteam.infoTutorials and Problem Sets. Tutorials & Problem Sets. The Meaning of Redox ·
The Rules Governing Oxidation Numbers · What is a Half-Reaction? Balancing ...

ChemTeam: Equations : Complete Molecular, Complete Ionic and To transform a complete molecular equation to a complete ionic equation , you
need to know the difference between an ionic compound and a molecular ...

Determination of the Charge on an Electron - Chemteam.infoI. Pre-History. The charge on electron was first measured by J.J. Thomson and
two co-workers (J.S.E. Townsend and H.A. Wilson), starting in 1897. Each used a
...

ChemTeam: Which Elements form Ionic Bonds?The positive/ negative charge attraction would hold the two ions together. ... The
other elements in this column exhibit such complex patterns of behavior that they
...

ChemTeam: Freezing Point Depression ProblemsExample #1: Calculate the freezing point of a solution of 5.00 g of diphenyl ... x is
the molecular weight of Vitamin K, 0.500 and 4.43 are from the problem and ...

ChemTeam: Physical and Chemical ChangesI. Physical Changes . A physical change is any change NOT involving a change in
the substance's chemical identity. Here are some examples: (1) any phase ...

ChemTeam: Calculate Ksp when Given Titration DataProblem #1: A solid sample of Ca ( OH ) 2 is shaken with 0.0100 M CaCl2. Once
equilibrated, some solid Ca ( OH ) 2 remains undissolved. The solution is filtered ...

Hydrogen and chlorine have different influences on the electron density in the
carbon-carbon bond and that has an influence on how much energy it takes to ...

ChemTeam: Balancing Chemical EquationsBalancing Chemical Equations . Return to Equations Menu. Chemical equations
do not come already balanced . This must be done before the equation can be ...

ChemTeam: Kw: The water ionization constantKw: The water ionization constant. Return to the Acid Base menu. Important note:
all constants refered to: Kc, Kw, Ka, and Kb are temperature-dependent.

Equations : Complete Molecular, Complete Ionic and Net IonicIons (never words) will be used for the complete ionic equation and the net ionic
equation , which will follow just below. You can use words for an ionic equation ...

ChemTeam: Calculate empirical formula when given mass dataProblem #1: A sample of copper metal weighing 2.50 g is heated to form an ...
Problem #2: On analysis, a compound with molar mass 60 g/mol was found to ...

ChemTeam: Converting between " ppm " and molarityThis last one works because the solution concentration is so low that we can
assume the solution density to be 1.00 g/mL. Also, it's this last modification of
ppm ...

The Effect of Temperature on the Position of the Equilibrium and the The Effect of Temperature on the Position of the Equilibrium and the Keq. Go
back to Equilibrium menu. Example #1: H2(g) + Cl2(g) <==> 2HCl(g) + heat.

ChemTeam: Strong acid and strong base titrationsReturn to a listing of many types of acid base problems and their solutions ·
Return to the ... Ba(OH)2 is a strong base , so it dissociates 100%. Remember
also ...

NH3 + H2O <===> NH4+ + OH ¯. However, it is important to also consider the
reverse equation, since this is an equilibrium. In this case, note that HB+ is the
acid ...

ChemTeam: CombustionDO NOT just copy the subscripts from the reactants over into the products .
Combustion , at its most general, can mean the reaction of oxygen gas (O2) with ...

Here they are: atmospheres (symbol = atm ); millimeters of mercury (symbol = mm
Hg); Pascals (symbol = Pa ) or, more commonly, kiloPascals (symbol = kPa) ...

How to Calculate a Calorimeter Constant - ChemTeamHere is an answer on Yahoo Answers - Chemistry about how one goes about
determining a calorimeter constant . Here are two videos which each discuss the
...

Discussing gas density is slightly more complex than discussing solid/liquid
density . Since gas volume ... You can calculate the standard gas density fairly
easily.

ChemTeam: Main MenuWelcome to the ChemTeam. A Tutorial for High School Chemistry . The
ChemTeam provides study resources in all standard topics for students in high
school ...

Here they are: atmospheres (symbol = atm); millimeters of mercury (symbol = mm
Hg ); Pascals (symbol = Pa ) or, more commonly, kiloPascals (symbol = kPa) ...

I'll explain the above equation using an example problem. .... Problem #7: The
standard enthalpy change , ΔH°, for the thermal decomposition of silver nitrate ...

ChemTeam: Time-Temperature GraphWe are going to heat a container that has 72.0 grams of ice (no liquid water yet!)
in it. To make the illustration simple, please consider that 100% of the heat ...

PV = nRT : The Ideal Gas Law. Problem Set #1 ... For a static sample of gas, we
can write each of the six gas laws as follows: PV = k1. V / T = k2. P / T = k3

Solubility Table - ChemTeamThese rules are general and qualitative in nature. Each rule has exceptions and
the important ones are noted. The most common definition for solubility is this:.

ChemTeam: Metric SystemMetric Unit to Another (10 probs) · Converting two metric
units (numerator and denominator) at a time (10 probs) · Converting Metric
Square ...

ChemTeam: Elements and CompoundsI would like to lead into discussing elements and compounds by first considering
a general classification scheme for all matter. The word "matter" describes ...

ChemTeam: Atomic Structure - DaltonJohn Dalton (1766-1844): The Father of the Chemical Atomic Theory . Return to
Atomic ... The path that Dalton took to the chemical atomic theory is complex.

ChemTeam: Nomenclature-PolyatomicGiven Formula , Write the Name ... That means, if you see a formula like BaSO4,
the name is not barium monosulfur ... How do you know your phone number ?

Go to Answers - ChemTeamHow many grams of KCl is produced from 2.50 g of K and excess Cl2. From 1.00
g of Cl2 and excess K? 4. Given the following equation: Na2O + H2O ---> 2 ...

ChemTeam: Solubility RulesGeneral Rules of Solubility . Return to Solutions Menu. The dividing line between
soluble and insoluble is 0.1-molar at 25 °C. Any substance that can form 0.1 M ...

ChemTeam: Scientific NotationThe trade-off, of course, is that you have to be able to read scientific notation as
well as convert between scientific notation and standard notation (also called ...

ChemTeam: Introduction to hydrolysis calculationsThe other two (salt of strong acid and salt of strong base) are ignored or lightly
treated. Hydrolysis calculations are best understood in terms of acid base ...

ChemTeam: Math With Significant FiguresMath With Significant Figures Addition and Subtraction. Return to Significant
Figures Menu. In mathematical operations involving significant figures , the
answer ...

Problem #1a: Calculate the frequency of radiation with a wavelength of 442 nm.
Example #1b: The ... 2) Use λν = c to determine the frequency: (67.5 x 10-6 m) ...

We are going to determine the specific heat of copper metal. ... mL of water at
25.0 °C. The calorimeter heat capacity is 1.23 J/K. Given that the final
temperature ...

ChemTeam: Time- Temperature GraphThe Time- Temperature Graph. Return to Thermochemistry Menu. We are going
to heat a container that has 72.0 grams of ice (no liquid water yet!) in it. To make ...

Go to Answers for Density Problems #1-10 - Chemteam.infoGo to Density Problems #11-20 ... From this information, calculate the density of
mercury. d = 306.0 g / 22.5 mL ... The density of silver is 10.5 g/cm3. d = g / cm3.

The Ideal Gas Law was first written in 1834 by Emil Clapeyron. This is just one
way to "derive" the Ideal Gas Law : For a static sample of gas, we can write each
of ...

Rules for assigning oxidation numbers - Chemteam.infoWith only a very few exceptions, oxidation states can be assigned to all atoms in
a formula. There are more extensive sets of rules and, for the most part, they ...

The molecular weight of a substance is the weight in atomic mass units of all the
... of each element are in a substance in order to calculate its molecular weight .

Electronegativity and Bond Type - ChemTeamI. Nonpolar Covalent : This type of bond occurs when there is equal sharing (
between the two atoms) of the electrons in the bond . Molecules such as Cl2, H2
and ...

Metric Prefixes - Chemteam.infoIn order to properly convert from one metric unit to another , you must have the ...
do the distance between kilo and centi by comparing the exponents of positive 3
...

Standard Enthalpy of Formation - Chemteam.infoThe standard enthalpy of formation for an element in its standard state is zero. ...
One hint: there will be a table of standard enthalpies of formation somewhere in ...

fairly easily. Just take the mass of one mole of the gas and divide by the molar
volume. ... Comment: For both solutions, we need the " molecular weight" of air :.