chemistry

and power, transportation and..? communication?

Hi just finished my gcse's and got a's and b's I'm really keen on becoming a dentist and with the research I have done it says that you need an A- in chemistry and an A - in biology at gcse I eased through biology and got an a* and I'm definately taking it as an a level but in chemistry I...

One isotope of silicon, Si-32, has a half-life of 150 years. If there were 300 atoms of silicon initially, approximately how many atoms will be left after 150 years?

What are two plays by Shakespeare that in some point pertain to chemistry. Hints: One of them contains a question on metallurgy, and the other has two acts that revolve around or are related to a common chemical substance, which it is mentioned in conversation twice.

Would anatomy, physiology, and microbiology be enough? I already took those three classes, but I skipped introduction to chemistry because I took it in high school (2 years ago), and did not want to retake that in college. Instead, I thought I'd skip introduction to chem. and organic chemistry...

and psychology? ???!!!

and psychology? ???!!!

and psychology? ???!!!

i need a very good/ interesting topic about chemistry for my class. any suggestion?

1.What is the volume of 0.142 M K2Cr2O7 would be required to exactly react with 56.8 mL of 0.100 M Na2SO3 in acidic solution? The products contain Cr3+ and SO4 (2-) 2.The iron in a 5.700 g sample containing some Fe2O3 reduced Fe (2+) . The Fe(2+) is titrated with 11.41mL of 0.1420 M K2Cr2O7 in...

How many can you think of?

How many can you think of?

I have a chemistry test coming up and heres a practice test I know how to do some of the problems but I just wanted to make sure I got them right. So please just answer them showing how you got the answers!! I really want to pass my test thanks! And all the " meaning to the power of. Rewrite...

My teacher does not want me to do a topic on war-related subjects. :( (only using chemistry in a postive way.) It could be anything that relates to chemistry. I thought about how fruits rot..and i am idea-less. Any ideas?

If one wanted to create approximately 5000. kJ of heat, how many milliters of ethyl alcohol should be used?

For the system 2SO2(g) + O2(g) <---> 2SO3(g), _H is negative for the production of SO3. Assume that one has an equilibrium mixture of these substances. Predict the effect of each of the following changes on the value of the equilibrium constant an don the number of moles of SO3 present in the...

For the system 2SO2(g) + O2(g) <---> 2SO3(g), _H is negative for the production of SO3. Assume that one has an equilibrium mixture of these substances. Predict the effect of each of the following changes on the value of the equilibrium constant an don the number of moles of SO3 present in the...

Guys i urgently need to design a lab that combines the three sciences I need suggestions and wheres the bio chem and physics part in them! thanks all peepz

I had activities about moles that I had to do in class, and answer questions about it. I am so confused about it all. So I'll just give you three that I can use to check my other stuff(so you know I'm not trying to get you to do my homework). 1. How any drops of H2O can fit on a penny (3...

my boyfriend and i have had amazing sex for the past years in our relationship, me mostly carrying the spark, and that was okay with me. recently, he's slowed down our sex to about 1-3 times a week when we usually have sex every day. when we do have sex, he makes it a point not to look at me. i...