Applied Chemistry

can anyone help me with the answer to this question? Calculate the chemical amount of anions in 133.1 mL of a 0.4432 M solution of barium nitrate. its greatly appreciated.

Calculate the concentration of anions in a solution prepared by dissolving 0.605 g of cobalt(III) chloride in sufficient water to produce 350.0 mL of solution. Anyones help would be greatly appreciated

Hello, My question is quite simple: HOW DO COMPOUND IONS FORM? i really want to know about the certainty of the formation about compound ions.... thx for the reply

what would the variables and controls in this experiment be? What makes apples and bananas go brown?

This may sound like a mediocre question but how do you know what the expected values and the experimental values are in an experiment? I am trying to calculate the percent error for an experiment we conducted in lab.

Can you help me with these two questions please If 4.436 g of NaOH was added to 150.0 mL of water and we assume the density of water to be 1.000 g/mL Then what is the total mass? Given that the temperature change observed was 11.5 C when4.436 g of NaOH were added to 150.o mL of water, What is the heat energy in kJ that is produced. (Don't forget the specivic heat of this solution is 4.06j/g C and assume the density of water to be 1.000 g/mL) Thanks

Can someone please help me with this problem? a gas was found to have a density of 1.13 g L-1 at 22.0 C and a pressure of 755 torr. What is the molecular mass?

A(aq) + 2B(aq) ---> 3C (aq) + D (aq) For the reaction above, carried out in solution at 30deg C, the following kinetic data were obtained: Experiment Int. concentration of reactants mol/L Ao Bo 1 .24 .48 2 .24 .12 3 .36 .24 4 .12 .12 5 .24 .06 6 .140 1.35 Int. rate of reaction …

Can I calculate dG with dH and without dS?

On the main page there was this link: http://scienceforums.net/forums/showthread.php?s=&threadid=2747 Noting that a new form of matter was found stating that solid, gas, liquid, plasma and Bose-Einstein condensate were previously known. Question 1: Since i study chemistry, i was wondering where super critical fluids fall under? Question 2: And if they are a different type why aren't they mentioned? Question 3: If super critical fluids aren't a different form of matter, what differentiates the condensates with the three forms (gas, solid, liquid) which everyone is familiar with?

I was wondering why two substances can either react with one other when one is in the LUMO state and the other in the HOMO state. Why can't a LUMO react with another LUMO if there are no hinderances or a HOMO/HOMO reaction?

I understand that the rate-determining step (rds) is the slowest step in a reaction. However I don't really understand how we establish which "step" it is. Here's the problem: Bromine can be formed by the oxidation of hydrogen bromide with oxygen. The following mechanism has been suggested for this multi-step reaction. 1. HBr + O2 --> HBrO2 2. HBrO2 + HBr --> 2HBrO 3. HBrO + HBr --> Br2 + H2O 4. HBrO + HBr --> Br2 + H2O (a repeat of step 3) rate = k[HBr][O2] Explain which of the four steps is the rate-determining step for this reaction. Also I would like to know in general how you establish the RDS for any given reaction provided…

hey YT2095, how did you make that mini Tesla Field generator? it looks awesome

I was thinking about factors that affect the rate of reactions So far, i know about: -Catalysts -Surface area -Concentration or pressure -Temperature Are there any others? Please give examples in which they occur. Thanx alot guys!

Problem: Use simple structure and bonding models to account for each of the following. a) the bond length between the two carbon atoms is shorter in C2H4 than in C2H6. b) The H - N - H bond angle is 107.5 degrees in NH3. c) The bond lengths in SO3 are all identical and are shorter than a sulfur-oxygen single bond. D) The I [3-] ion is linear. Note: the brackets [] indicate the ionic charge. How do i approach this? i dont understand what they want, the molecular geometry ? the shape?

Hey, im a student from australia, i need to name 2 substances that can become hazardous if their chemical or physical state change and i need to know health risks associated with them. if someone can help i would appreciate it.

I remember my Chemistry teacher telling us about a theory the other day (I'm in Chem I, just started, and we were doing radioactive decay). Started with a Z, and basically said nothing can ever totally reach another destination, or in the case of radioactive materials fully decay, because you're always halving distance, or the appropriate factor, and nothing halved=0. Had to do with half-lifes...anyways...help?

If i have the Ksp of sodium benzoate(a sald of the WA benzoic acid), how do i find the Ka of benzoic acid?

i know this is actually polymer chemistry, but there is no seperate forum for that and i thought that organic was the closest related to it. What i was wondering is how you can determine average molar mass of a polymer through simple titration. I have heard of cloud point but can anyone tell me what i would need to do exactly to determine the average molar mass through this method??

Ok, i already know that the making of ammonia is an example of a reversible reaction. When u increase the pressure, the forward reaction is encourages. Can u give me an example where the backward reaction is encouraged when the pressure is increased? Thanx alot guys!

We were having a discussion in chemistry class today, and I wanted to see what you guys thought about it: Temperatures lower than twenty-eight degrees F damage grape vines. Grape growers often spray water on their plants before a night when the temperature is expected to drop below freezing to keep the grape plants from being damaged, and the technique works. Why? We've agreed that the water on the outside of the grape will freeze before the grapes themselves will. I hold that because of this, the grape will maintain a temperature higher than freezing for a longer period of time: the cold takes longer to get to it since it has to freeze the water outside the…

I was just wondering due to the fact of the amazing wheather we had (-35celecius) and then a snow storm why frozen pipes don't break at the point where the ice is formed. Also any1 have any tips for making sure that the oil tank outside our house dosent get its pipe broken? Thanks!

I am doing a home school chemistry course over the summer where I will basically teach my self from a college chemistry book. I have already gone through the book and written down labs that I would like to do and the chemicals that I will need. My parents do not think its safe because they say I do not have the knowledge to know what I am doing, and they want more structure. Does anybody know where I can find/buy a lab manual that has instructions in it? Some of the things I would like to do are: Burn Sulfur Potassium chlorate + Sucrose Burning Magnesium Ammonium Nitrate +water I have only written down the more dangerous ones. I really need to …

What makes the job of a biochemist different than the job of the chemist?

HI, I got this stupid question that puzzle me for quite a while but I still cannot answer it. When you integrated a graph with concentration on the Y and Time on the X, i.e. Area under the curve, what did you get??? Is that any term that we use to describe the result? Cheers. Forest