A research group from the University of Leeds has shown that infection by the brain parasite Toxoplasma gondii, found in 10-20 per cent of the UK's population, directly affects the production of dopamine, a key chemical messenger in the brain. Their findings are the first to demonstrate that a...
The finding for which this year's Chemistry Nobel was awarded earlier today was sufficiently unexpected and counter to the orthodoxy of the time that today's prize winner was tossed out of his own research group for reporting it. His 1982 discovery has to do with how atoms are organized in...
...the NINTH edition (9e)? I have the eighth, but I want the 9th. I understand science text books are virtually identical from edition to edition, but I need the new one for homework reasons. If you have it, load it on a torrent site and let me know! Or, if you have a link for one already, let...
The laser in Blu-Ray players emits light at 405 nm. Lasers can emit light in short bursts called pulses. The number of photons emitted during a pulse is dependent on the length of the pulse as well as the power/intensity of the laser. Calculate the total energy emitted, in J, for a blu-ray laser...
Researchers at The Pennsylvania State University College of Medicine, Hershey, Pennsylvania have discovered that a low dose of the opioid antagonist naltrexone (LDN) has an extraordinarily potent antitumor effect on human ovarian cancer in tissue culture and xenografts established in nude mice...
Chemistry is everywhere, we deal with it everyday. What can be some interesting topics to discuss with seniors? Or interesting experiments? Something we deal with everyday..
Correct Incorrect Ungraded
1.
What is the new freezing point (T2) of water (normal freezing point T1 = 0°C) if 50.0 g of ethylene glycol (Molar mass=62g/n)(d.f.=1) is in a 1 liter solution?
A) 1.5 °C
B) -1.5 °C
Feedback: Correct!
C) 15 °C
D) 101.5 °C
Points Earned: 1.0/1.0
Correct Answer(s): B...
I have to write a research paper for chemistry to bring up my C to a B. I need something really really interesting to write about because I'm not too crazy about chem. and I need a topic that's goin to
keep me interested.
Topic ideas please :)
1. What would be the next step after testing a hypothesis?
A) Dismiss data.
B) Communicate results.
C) Analyze results.
D) Form a hypothesis.
2. What is the electron configuration for neon?
A) 1s2, 2s2, 3p6
B) 1s2, 2p6
C) 1s2, 2s2, 2p5
D) 1s2, 2s2, 2p6
3. When lithium is placed in...
have no idea where to start? 2. If 200mL of oxygen at 100EC is heated to 200EC (the pressure remaining constant), what will be the new volume of the gas?
3. A 300mL sample of hydrogen is measured at 27EC (room temperature). Asssuming that the pressure does not change, at what temperature will...
i need it to be the chemistry of something.
it has to be able to have 2 book sources
make it interesting and something i wont be bored with
has to have a lot of information on the topic
please and thank you!!
I already have the Answers but I don't know how to get to them. Step by step would be extremely helpful!!
1.How many moles of oxygen are generated during the thermal decomposition of 7.75 g of lead (IV) oxide?
2.2. A sample of sodium metal having a mass of 5.45 g reacts with excess water...
I've been doing chemistry work for the past 4 hours. I'm on the last page and I don't feel like reading anymore to get the answers. So can someone help out? :)
It's a paragraph that has blanks and you have to fill them in. Here it is:
Atomic radii generally __1__ as you move from left to right...
Chemistry riddle i need help?
so the question is
what do we mean when we say that one radio active nucleus is "hotter" than another?
which element would have more decay events over a given period of time?
So a question on my hw asked:
(3.145E+07) - (1.2E+06)= ?
My teacher's key says 3.02E+07 is the answer, which I do not understand. Since we have to keep sig figs in mind, I see that 1.2E+06 has the least amount of decimal places which is 1. So why does he have 3.02E+07? That is three digits...