chemistry

2nd International Conference On Medicinal Chemistry & Computer Aided Drug Designing, MedChem & CADD-2013 is a remarkable event which brings together pharmaceutical companies, leading universities, small biotechnology enterprises, government agencies and research institutions to share ideas...

Hello there.. I'm having some problems with this question. Can anyone help me by explaining how to get the answers? An Aqueous solution of hydrogen peroxide, h2o2, is 30% by mass and has a density of 1.11g/cm3. Calculate its: a) molality b) molarity c) mole fraction Given the answers are...

Johns Hopkins researchers believe they may have discovered an explanation for the sleepless nights associated with restless legs syndrome (RLS), a symptom that persists even when the disruptive, overwhelming nocturnal urge to move the legs is treated successfully with medication. Neurologists...

organic chemistry that interests me.? It has to be 7-10 pages and apa format. Any suggestions

hi im confused i haved try these problems 2 times and got the wrong can u guys give me explanitantions for these problems pls so in the future i can do them ty When heat flows from the system to the surroundings Student ResponseValueFeedback A.we define the flow of energy as negative and call...

...ONLINE QUIZ. I NEED TO GET IT RIGHT? When a sample of NOBr(g) (17.02 mol) is placed in 450.0 L reaction vessel at 508.0 °C and allowed to come to equilibrium the mixture contains 8.198 mol of NO(g). What is the concentration (mol/L) of Br2(g)? 2NOBr(g) = 2NO(g)+Br2(g) Molar MASS GIVEN...

Eventually, I need to get through the Calc 1-3 sequence. It's required for just about everything (biochem, bioengineering, physics etc...). What are the best self-teaching guides out there? Finally (and I know this is crude of me to say), would it be bad if I told myself I'd rather dig my own...

I can get it on the ipad but not the iphone

With the holiday season a high-risk period for packing on unwanted pounds, the American Chemical Society (ACS) today posted a new video that may lend perspective on this year's battle of the bulge. Produced by the world's largest scientific society, it explains the science behind the calorie...

Hello! So I'm writing a science fiction story about this fictional human civilization on another planet where it constantly rains. My main characters are scientists who work on atmospheric readings and such. I want the facts to be mostly correct. Is there possibly a chemical that could be...

Hello! So I'm writing a science fiction story about this fictional human civilization on another planet where it constantly rains. My main characters are scientists who work on atmospheric readings and such. I want the facts to be mostly correct. Is there possibly a chemical that could be...

I know that in chemical trends with the periodic table, shielding takes precedence over effective nuclear charge. If I was told to arrange the elements Cl, Ar and K in order of increasing value for ionization energy, what is it? Would it be K the lowest (because shielding takes precedence), Cl...

the balanced equation is: 1Na2SO3+2HCl-->2NaCl+1SO2+H2O there is 25 g of Na2SO3 and 22 g of HCl the limiting reactant is Na2SO3 1. the questions are what is the mass of SO2 produced? 2. How many moles of excess reactant is left over? can you please list the steps on how you figured out...

Any kid knows how to produce an entire foley library worth of gross sound effects from a bowl of jello. But Raphaël Pluvinage and Marianne Cauvard's Noisy Jelly kit produces more pleasing sounds using gelatinous shapes and a special playing board. More »

Try to show work if you can. Thanks my friends. 1)What is the volume of 36.76 g of C8H18? Show work 2)Find the number of grams in 6.47 x 1025 molecules of C8H18? Show work 3)Find the total number of atoms in 7.23 moles of lead (II) oxalate? Show work 4)Calculate the percent composition of...

a 500. mL flask at...? 15.00g of solid ammonium hydrogen sulfide is introduces into a 500. mL flask at 25'C, the flask is sealed, and the system is allowed to reach equilibrium. What is the partial pressure of ammonia in this flask if Kp=0.108 at 25'C for NH4HS(s) --> NH3(g) + H2S(g)? Thank you! :)

A metal that has only a +2 ion and is the third member of the group forms a compound with a nonmetal that has a -2 ion and is in the same period. What are the formula and name of the compound?

Which of the following happens when NaCl dissolves in water? the chloride ions are attracted to the negative end of the water dipole sodium and chloride ions form covalent bonds with water molecules the sodium ions are attracted to the negative end of the water dipole the sodium ions are...

A bottle of vodka is labeled as 60 proof. What is its alcohol content? 7.5% 15% 30% 60% What is the weight of BaCl2 in a 0.250 L bottle of 0.200 M BaCl2? Question 2 options: 5.21 g 10.4 g 41.7 g 52.1 g How much KBr must be used to prepared 250 mL of a 4.4%(w/v) solution? Question 3 options...

could i have opinions please why gcse students think additional gcse chemistry is interesting thanx