chemistry! URGENT

60,135 results, page 53

Chemistry

How can we recover NaNO3 from an unsaturated solution

Chemistry

What is the mass of a phosphorus triioxide molecule?

Chemistry

What is the mass, in grams, of 7.18 x 10^24 molecules of chlorine?

chemistry

why is it important to know how to separate solids from liquids

chemistry Dr BOB

is this right? C2H6O + 3O2 = 2CO2 + 3H2O 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 ...

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 ...

Spanish (URGENT)

Can someone please check my work? Write a paragraph describing your party. La fiesta está en una grande mansión. Tiene seis cuartos, una recamára principal, tres (guest rooms), ocho baños, un comedor, un grande patio, una piscina interior, (and outside mini golf course) y...

Chemistry(Please respond, thank you!)

For the system CaO(s) + CO2(g) = CaCO3(s), I added 1.00 mol of CaO(s) to 1.00L of 0.500M CO2(g) at 200 oC. At equilibrium the [CO2] = 0.150M. What is the value of Kp for this reaction? Kp would = CaCO3/(CaO)(CO2) I do not know what to do with the 0.500M and 1.00mol. Chemistry(...

Chemistry

What is the pressure (in atmospheres) of the gas inside the container connected to an open-end, mercury-filled manometer as shown in the picture? The atmospheric pressure is 0.95atm. l----l | (G) l | l - --- l Hg l Hg *18cm - - --- Hg Hg HgHgHgHg what process do I use to solve...

MARKETING

Mr. Pennymarch, the advertising manager for Chemistry Today magazine, is responsible for selling advertising space in the magazine. The magazine deals primarily with chemical processing technology and is distributed solely by subscription. Major advertisers in the magazine are...

chemistry

i cant understand anything in carbon and its compounds. can you give me any the basics of what i need to learn in carbon and its compounds Carbon has a usual oxidation state(valence) of +4 and it can bond to itself. Therefore, there are millions of carbon containing compounds...

Chemistry

Chemistry equilibrium? Consider the reaction 2NO(g) + O2(g) = 2NO2(g) at 430C an equilibrium mixture consists of 0.020 mole of O2, 0.040 mole of NO, and 0.96 mole of NO2. Calculate Kp for this reaction given that the total pressure is 0.20 atm. I used PV=nRT to find the volume...

Chemistry

If you have 200 ml of a 0.1M solution of acetic acid (pka=4.75), 1. How many ml of a solution of 1.O M NaOH would you need to adjust the pH to 5.2? "Chemistry - DrBob222, Wednesday, June 29, 2011 at 8:41pm 200 mL x 0.1M = 20 mmoles. 1. ............HAc + OH^- ==> Ac^- H2O ...

FRENCH HELP URGENT!!

I really need to have this paragraph checked to see if there is any mistakes!! My tutor has been sick all week! Thank you! Montreal est une ville exceptionnel que vous aimeriez. Si vous aviez le temps, vous ne regretteriez pas votre decision. Montreal est situe dans le Quebec ...

English

Urgent! Can someone please look these over? The sentences are very vague (welcome to online schooling, I guess). Some of them are questionable. Please help! Need to write whether the sentence is a "POINT" or "TOPIC" sentence. Point Sentence-Announces the topic of a paragraph ...

chemistry

What is the role of energy in physical changes? Please and thank you!!!

chemistry

how to calculate the mass of hydrogen in 150.0 g of ethene

Chemistry

How do i Convert 170 degress C to kelvins? K = 273 + C

Chemistry

Is Isopropyl alcohol an acid or a base? neither

Chemistry

How would I explain how I arrived at the following EF in words?

Chemistry

How many equivalents are in 1.75L of a 8.2M solution of sulfuric acid.

Chemistry

How many equivalents are in 1.75L of a 8.2M solution of sulfuric acid.

Chemistry

How do i balance this equation? Al+N2---->AlN 2Al + N2 ----> 2AlN

CHEMISTRY

How do i convert temperature? from what to what. Celsius + 273.16 = Kelvin

chemistry

you need a solution of 195 mg/dL., what would it be in g/L? [1g=1000 mg, 1L=10 dL]

Chemistry

the number of moles of O2 needed to produce 14.2g of P4O10 from P?

chemistry

Determine the molarity of 30% (w/w) KOH of specific gravity 1.29. Thanks for any help.

CHEMISTRY

I still don't get it. See question in previous post

chemistry

Calculate the number of hydrogen atoms in 20.0 g of CH3OH

Chemistry

How do I find the number of neutrons is the isotope lithium-7

Chemistry

I was asked to draw the resonance structure for N2O, How do I do that?

Chemistry

Galactose and Fructose are called isomers of glucose. Why?

chemistry

what is the direction and how do you find it for the dipole moment in scl2? to the 2 or the cl?

Chemistry

The diamenter of a carbon atom is 77 pm. Express this measurement in um?

Organic Chemistry

How does acetaldehyde impurity arise in the fermentation?

chemistry

What is the lewis dot structure for Fluoride, F1- and Mg2???

Chemistry

How many atoms of H are in a mixture of 3.49 x 10^23 molecules of H2O and 78.1g of CH3OH?

chemistry

what are the van der waals coefficients (a and b) for nitrogen?

chemistry

whats the pH if 25.0 ml of 2.0 M NaOH is added to 1.00 L of pure water?

chemistry

[Co(NH3)2(en)2]^+3 what is the A)coordination no. B)no. of ligands C)Oxidation state of Co

Chemistry

What property of liquids and solids is crucial in chromatography?

Chemistry

How do you find the simple configuration of electons for an element?

chemistry

Can someone define and describe Molecular water?

Chemistry

How many valence electrons are in ClO2. I think its 17...is it correct? Thanks.

Chemistry

The maximum number of electrons that can be accomodated in a p subshell is A.2 B.4 C.6 D. 8 E. 10

Chemistry

Which of the following elements has the smallest ionization energy? A. F B. Be C. B D. Mg E. C

Chemistry

what is theoxidation state of sulfur in Fe2(SO4)3?

cHEMISTRY

How many electrons are in the p-orbital of the methyl radical (CH3^.)

organic chemistry

What is the purpose of the outerjacket on a fractionating column?

Chemistry

write the resonance desription for the following A. ClNO2 B. NO-2

Chemistry

How do you make CIF2 into a Lewis Structure

Chemistry

Is it possible for an electron to have n=2 l=1 m=-2? EXPLAIN PLEASE

Chemistry

How many protons, neutrons, and electrons are in 24 +2 Mg 12 is it 12p, 14e- or 10 e?

Chemistry

Calculate the percent composition of calcium acetate.

Chemistry

Why can Copper have both a +1 and +2 oxidation state?

Chemistry

What are some paramagnetic inner transition metals?

Chemistry

What (metric) units are used for mass measurements?

chemistry

what is the molecular structure around oxygen in water?

chemistry

what is the name for a solution that can dissolve no more solute ?

chemistry

im confused with significant numbers how do you do them.. like for example 64 mL

Chemistry

How do u find the Hvap if you only know the slope is -.002 ?

chemistry

Are dispersion forces in hexane weaker than that of pentanol?

chemistry

Why is ice used during the sublimation process?

chemistry

what are two regions make up all atoms?

Chemistry

Does anyone know why amines show high solidility in water?

chemistry

Why do amines exhibit high solubility in wate?

chemistry need it proofread..

and we had to round this was the question

Chemistry

The units for a first order rate constant are: M/s 1/M*s 1/s 1/M^2*s

chemistry

how did you find the percent yeild for the eugenol benzoate?

Chemistry

How does the pH of human blood remain extremely constant?

chemistry

explain why hexane is a non polar molecule? thanks

chemistry

explain the polarity in ethanol? why it is polar molecule? thanks

Chemistry

What is the mass in grams of 1.02X10^24 molecules of NaCl?

beginning chemistry

calculate the volume of 750.0g of gold.

CHEMISTRY

AT STP, WHICH OF THESE SUBTANCES IS MOST SOLUBLE ON H20?

chemistry

How do you tell what dyes are more polar than others?

chemistry

do gases have a high or low density?

Chemistry

What would be the the oxidation number of (N): * NaNO3 * NH4Cl

Chemistry

What molarity of NaOH would produce a pH of 10? And how do you calculate it?

Chemistry

how do you write the reduction half-reaction of ions?

chemistry

How do i figure out the electron configuration of Fe(C2O4)3^3- ?

chemistry

how to write this as a net ionic equation? Al(s)+ H2SO4(aq)

chemistry

why are anions always larger than the atoms from which they are formed

chemistry

how are molecules and poly atomic ions similar?

Chemistry

How many grams of KCl can you dissolve in 50. g of water at 70 degrees C?

CHEMISTRY HELP

IF ANYONE CAN HELP ME WITH MY HOMEWORK AND EXPLAIN EXACTLY HOW TO GET THE ANSWERSSS PLEASEEE HELP

chemistry

give the [OH] of a vinegar solution that has a pH of 3.2. i got 6.3 *10^4. is that right?

Chemistry

What are advantages/disadvantages to using esters in foods?

Chemistry

Where can I find a picture of the molecular orbital diagram for OH-?

chemistry

what are the components of one formula unit of CaF2?

CHEMISTRY

What are the three major types of chemical bonds?

chemistry

how would you state Ag2CrO4 acting as a cathode?

chemistry

How do you figure out what substances form a buffer?

organic chemistry

What is the newman projection of meso-2,3-dichlorobutane?

ORGANIC CHEMISTRY

WHAT IS THE BEST COMBINATION OF REACTANTS FOR CH3CH2CH2CH2OCH3

chemistry

Describe the parts of a calorimeter and the function of each part.

chemistry

calculate the number of fluid ounces in 6.03 gal.

Chemistry

What are some examples of homogeneous and heterogeneous substances?

chemistry

Conversion Factor how fast is 55mi/hr in ft/sec?

chemistry

whats the use of an iron ring and a descrption for it

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