CHEMISTRY (WEBWORK)

58,560 results, page 9

Chemistry

What is NaOH?

Chemistry

What is Enthalpy?

chemistry

(2.00x10⁵)⁻³

chemistry

what is 1.79 x 10^-20 in kJ/mol?

Chemistry

What is the pH of a solution with a [H+]=10^-8?

Chemistry

What is the pH of a solution with a [OH-] of 10^-2

Organic Chemistry

Hello, I have done an experiment in Organic Chemistry called :SN1 Reaction: Synthesis of t-amyl chloride from t-amyl alcohol, there are some questions that I am unsure about, 1) What are the 2 rules of HCl in this reaction? Can you use NaCl instead of HCl to synthesize t-amyl ...

Chemistry Dr. BOB

I don't get it!! In winemaking, the sugars in grapes undergo fermentation by yeast to yield CH3CH2OH and CO2. During cellular respiration, sugar and enthanol are "burned" to water vapor andCO2. Write a combustion reaction for ethanol. I need help with balancing the equation i ...

chemistry

if you have one mole of CH3CH3(g) + 2 moles of Cl2 (g) and form one mole of C2H4Cl2 (l) + 2 moles of HCl (g) assuming a 90% yield calculate the amount of each reactant needed to form 1.5 kg of product I started the problem following the rules from the chemistry stochiometry ...

cHEMISTRY

wHAT IS THE SYMBOL FOR THE ION WITH 13 PROTONS AND TEN ELECTRONS? CAN U EXPLAIN HOW TO GET YOUR ANSWER, AND CAN YOU GIVE ME A WEBSITE THAT HELPS ME WITH CHEMISTRY 13 protons will be element with atomic number of 13. Look on the periodic table and see atomic number 13 is ...

Chemistry (A level)

I was given a Chemistry question on the titration of a strong base being added to a weak acid. The question was: "Calculate the pH in a titration when 10.0cm^3 of a 0.10moldm^-3 solution of NaOH is added to a 10.0cm^3 of 0.25moldm^-3 solution of ethanioc acid? (Ka = 1.76 x 10...

Chemistry(Please check)

. Ksp for Fe(IO3)3 is 10-14. Two solutions, one being iron(III) nitrate and the other being sodium iodate, were mixed. At the instant of mixing, [Fe3+] = 10-4M and [IO3-] = 10-5M. What happens? My answer is that a precipitate forms because Qsp > Ksp. Would you agree? ...

Algebra

70 students are studying mathematics,physics & chemistry.40 students study mathematics,35 study physics and 30 study chemistry.15 students are studying all the three subjects.How many students are studying exactly two of the subjects

Chemistry

In chemistry lab we did an experiment trying to find the empirical formula of an oxide and tin. The question is "suppose some of the oxide splattered out of the crucible. How would this affect your calculated ratio of the number of moles of oxygen to the number of moles of tin...

Chemistry

A 35g sample of Fe is dropped into 80g of water at 20 degrees Celsius. What is the final (equilibrium) temperature of the iron/water? This isn't really a chemistry problem. There will be no chemical reaction. It is a heat capacity (physics) problem. Use the specfic heats of ...

chemistry

The question I am having trouble with is: Scientists originally were uncertain whether the oxygen gas produced during photosynthesis came from CO2, H2O, or from both. How could radioisotope tracers be used to settle that question? Chemistry - DrBob222 6CO2 + 6H2O ==> ...

Chemistry

Ok i'm supposed to google these values for my teacher, but i can't get the answer im looking for...if you have them can you give them to me? Latice Energy for: Ammonium Nitrate and Calcium Chloride Hydration Energy for: Ammonium ion, Calcium Ion and Chloride ion Thanks I had ...

chemistry

Captain Kirk, of the Starship Enterprise, has been told by his superiors that only a chemist can be trusted with the combination to the safe containing the dilithium crystals that power the ship. The combination is the pH of Solution A described below, followed by the pH of ...

Organic Chemistry

Hello! I was looking for some advice on my organic chemistry lab. We were supposed to separate and identify a solid mixed into a liquid. I found and have confirmed my liquid is acetone by distilling it out of the solid. The solid then turned into a whitish powder while in the ...

Chemistry

I recently performed an experiment in which magnesium oxide formed. I have to find out the simplest whole number ratio of Mg atoms to O atoms. How do I go about doing this? * Chemistry - DrBob222, Tuesday, October 13, 2009 at 11:19pm Mass MgO - mass Mg initially = mass oxygen ...

Chemistry

Hi I was hoping to get some help on this. It's review for my chemistry text on Monday and I would be grateful if someone could help me out. My teacher has been out for two weeks but we still have to know this material. 1. The following data was collected for the reaction ...

CHemistry....Please help...DrBobb

I posted this up yesterday: I have to use the equation : density= mass/ volume: But i don't know how to find out the volume using the edge length of the unit cell which is 5.88* 10^2 pm. CHemistry....Please help - DrBob222, Sunday, January 25, 2009 at 10:41pm If the edge ...

Chemistry

For a chemistry lab the experiment was to carry out an acid-base titration to determine the exact concentration of a sodium hydroxide solution. Two trials were completed and the data collected was: mass of weighing paper, mass of weighing paper + KHP, mass of KHP, initial ...

chemistry

The half-life of a reaction was found to be inversely dependent on the concentration of the starting material. Thus, we can say that a. the reaction is zero order b. the reaction is first order c. the reaction is second order d. the reaction starts out first order and changes ...

chemistry

The half-life of a reaction was found to be inversely dependent on the concentration of the starting material. Thus, we can say that a. the reaction is zero order b. the reaction is first order c. the reaction is second order d. the reaction starts out first order and changes ...

Chemistry

A student finds a medallion which could be made of pure platinium or silver. IN order to find out what the medallion is made of the student takes the medallion to a chemistry lab. The student measures the density of the medallion as follows. The medallion is placed on a ...

chemistry 12

what is the relationship between ka and kb? Kw=ka*kb

Chemistry

How do you draw Al2 + O2

chemistry

is a element an atom?

chemistry

16 years = ? seconds

chemistry

what is the electron configuration for S?

chemistry

Cu(NO3)2 (aq) + H2O===> ?

chemistry

how many moles of x in 33.3g of substance?

Chemistry

5.000g / 2.5mL = ?

chemistry

Why isn't sucrose an electrolyte

Chemistry

THERE IS NOTHING WRONG WITH ME!!!!!!!!

Chemistry

what is the mass of a mole of M&M's? How do I do this?

chemistry

How many moles of Pb is 9.3 x 10^15 atoms of Pb?

chemistry

How to get the hybridization of N IN NO2- ?

Chemistry

I don't know how to solve for x in this equation.... 1.75 x 10^-5 = (x^2)/(0.10-x)

chemistry

why are volumes not additive?

chemistry

325*f to kelvin

chemistry

how to calculate persenteil

chemistry

what is the electron geometry of F^2, HF ?

chemistry

What is partial pressure?

chemistry

What is the pH, pOH and [OH-] of 0.06 mol/L HI(aq)?

chemistry

What amount is a mol?

chemistry

what is Hydrogen Bonding?

chemistry

how many moles are in Fe2O3

chemistry

how to draw 1,2 - diethyclyclohexane?

chemistry

convert 5.98 x 10 to the 24th kg. to mg.

chemistry

why is it good to be a csi

chemistry

what is particle movement?

chemistry

name 2 alkalis

AP Chemistry

what does pv/nRT tell you?

chemistry

What is the shape of H3C+ ?

chemistry

examples of solutions

chemistry

C6H5NO2+? = C6H5N2Cl

Chemistry

what is electron configuration?

chemistry

how do you make soap

Chemistry

Why do ions form?

Chemistry

NaBr+AgNO

Chemistry

How can you separate compounds?

chemistry

What is an equatorial substituent?

chemistry

what are pure substances

Chemistry 9

what were the firstsubstnces to be discovered

chemistry

how do you balance equations?

Chemistry

What does C12H26 stand for?

chemistry

does anyone know any uses of isotopes?

Chemistry

0.70 M KOH find the pH

Chemistry

0.70 M KOH find the pH

Chemistry

What is the formula of 1,3-butadiene?

chemistry

ii) What is the formula of 1, 3-butadiene

chemistry

how do you make 0.2M KI from 2M KI, what is the procedure?

Chemistry

What are amine salts?

Chemistry

What element is symbolized by X?

chemistry

How many moles is 66.02 grams of Fe?

chemistry

What is electrolysis, and how does it work?

chemistry

why does evaporation cause cooling?

chemistry

explain that f+2 means

chemistry

what is the duet rule?

chemistry

0.35m to centimeters

chemistry?

why does Si-28 contain 14 neutrons?

CHEMISTRY

WHAT ARE AMINE SALTS?

Chemistry

What is the mass (in kg) of 3.2 L of Br2?

chemistry

what is qualitative measurement?

Chemistry

How many grams are in a milliliter?

chemistry

what is the exponential notion of pH=1?

AP chemistry

what is the balanced equation of H + [Al(OH)4]

chemistry

what are the examples of suspension?

chemistry

what are electrostatic forces

chemistry

How many mililmeters(mL) are in a sample with 2.0L?

chemistry

nacl2+h2o

chemistry

how many moles are in 25 g of NaCl?

Chemistry

What are colligative properties?

chemistry

i HAVE A QUESTION

chemistry

is CaO soluble

Chemistry

What are induced dipoles?

chemistry

what is a strong acid

Chemistry

Does anyone know what is phenoxyethyolated alchohol?

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