researcher88

hi,

i need some help defining pH=-log10([H+]/M), and use the relation upH=|dpH/d[H+]|u H+.

i dont seem to find this in textbooks.

it will be great if somebody helped out.

"moral of the story... DONT MIX DRUGS. Even over the counter stuff like alcohol and asprin. Two together do what one alone cannot."

- ecoli

Mixing drugs may be dangerous. I once heard there was a girl who mixed some drugs while attending a party and after a couple of drinks, she felt into a coma and never woke up again (turned into a vegetable.)

That was what I thought at the beginning but I wasn't provided with that information. However the mass of zinc is there.

I have made calculations with other students and would like to get an "absolute sure answer". We are all not really sure about our answer as they all differ.

An adult needs 12mg of zinc per day.

An average oyster contains 200 ppm of zinc.

How many oysters are required to fulfill the daily intake of zinc for an adult?

Respond if you’re absolute sure.

Thanks!

Hi Shanethewolf,

Since this is a science community I should say something that will do you good, but I will not go further if you refuse to listen. I also think many of the members here will think this way.

• Please don’t “mess” with chemistry if you don’t know what is going on.

• Do not synthesise if you don’t know what reactions are occurring

• Unknown substances should not be inhaled or taken.

Why? Because many common substances can do damage to the brain, respiratory system and so on...

Examples: lead compounds, acid vapors, methanol, etc.

“I thought I'd give it a sniff too and I did. Then all of a sudden my mate let out this massive snort!! He sounded like a dragon and it was awesome!”

Not a good decision and it is not “awesome“

Please don’t do things like that again. If you want to be an amateur experimenter, practice safety first!

An classic example:

One classic example is Humphry Davy who died at an age of 51!

He suffered from a series of strokes which ultimately killed him.

This is because during his scientific work he smelted and tasted many new chemicals.

In conclusion, I will be worried if I was you, for yourself and your friend.

Thanks for identifying the following organism.

A friend of mine suggested the types of rotifers to me so I did some further research and concluded that it’s a Philodina rotifer.

More pictures and information can be seen in detail from the following link:

http://www.micrographia.com/specbiol/rotife/homebdel/bdel01ph.htm

Here is an anatomy of this organism.

Hi , does anyone know what is this microorganism?

It is a slug like organism which swims in the water and may also walk on algae

It has two fan-like structures on its head which spins to catch food particles.

The picture provided is at 100X under my microscope.

Can't capture full body because it keeps on moving around.

Indeed we are animals, the most intelligent animals on earth.

I seem to be more interested at the scientist's dedication.

Why will someone do such a thing?

By the way, A cockroach can live for several weeks without its head...im gonna try that.

Duran brand with fittings of 34/35 both cone and socket.

Length slightly above 30cm.

Notice the chipped parts circled in red. This chip does not interfere with its use.

This extractor is new and never used before straight out of its packet.

How much would you pay for it???

Try doing 20 push-ups and then stand up rapidly, that will get the stars dancing.

As I carefully chip away the unwanted parts of a lamb’s kidney, my class mate looked at my pile and replied: “look he is mincing it Yuk!” followed with the other gang of ignorant bastards saying: “What the f*** are you doing?” I didnt reply...

Soon I ended up having the best looking dissection in the class.

May their bloody thoughts be doomed!

Would it be safe and efficient to run a natural gas Bunsen burner with LPG?

Hello.

I am selling condensers. They are from AU $100-$200

I can only sell within Australia.Free packing as well!

If you are interested please email me at : eternally_fantasy@hotmail.com.

I will sell condensers of such type:

-------------------------------------------------

Coil (Graham) Condensers

-------------------------------------------------

Liebig Condensers

-------------------------------------------------

Double (Davies) Condensers

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Coil Jacketed Condensers

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By typing in the names, you can find pictures on google or other search engines.

The shipping price is already counted towards the condensers on the catalogue so people wont have to worry about that. But the delivery within Australia will be mentioned to the buyer.

You can also come to pick it up. I live in sydney.

I will provide you with a catalogue and instructions.

This is to be taken seriously!

Buyer and sellers details will be provided during contact.

Thank you.

I was thinking of using it as a condenser by fitting a flask on the center joint then the condensed product will freely come out from the upside down funnel like end. I measured the center joint as approx. size 14/23

Can anyone identify this piece of glassware?

Thanks

Try http://www.sparknotes.com

It has a wide variety of subjects

why dont you go and ask a scientist?

http://www.newton.dep.anl.gov/archive.htm

I just wanna ask what is the ratio and formula for the fastest / most powerful burning homemade solid rocket fuels. Any ideas?

I found this information while i did some searching on sushi...

Raw foods (such as your sushi, often made of raw fish) are generally the best for preserving enzymes and other nutrients, as long as the foods are fresh. Time, heat, freezing, microwaving and so on destroy those nutrients in a hurry. Nowadays, the main concern with raw foods is bacterial. Not all foods at the sushi bar are raw, and those that are tend to be well controlled (that is, free from harmful bacteria), as a restaurant's reputation can be blown pretty easily with a mishap.

Some of the foods obtained at sushi bars are rolled in white rice, which is a pure starch that converts to sugar quickly, has little fiber and has most nutrients removed. Try to go heavier on the fish (sushi style) and lighter on the rolls.

The "raw is okay" edict does not extend to oysters, in my opinion. Oysters, which sit in mucky beds on the bottom of bodies of water of often-questionable quality, are a gamble. Tread carefully where those are concerned, if you must eat them at all.

Soy sauce is a fermented soy product that should offer few problems in the average amounts used. The salt in there is rarely a problem, and it certainly isn't fattening. Ditto for wasabi, Japanese horseradish.

Wasabi comes from the root of the plant wasabia japonicum and is extremely hot. Because it's so hot, you really can't take enough in to make a difference calorie-wise, so that's rarely a factor in eating it.

Unfortunately, the stuff is very hard to grow, and improperly preparing it readily breaks down the hot, spicy nature. So "wasabi" in much of Japanese cuisine in America is standard horseradish that has been treated to a bath of food coloring. If that spice bothers you, it's possible that you're just allergic to dye (or horseradish).

yea sure thing

The average molar mass of petrol (octane) which is 114.08

For LPG (propane) which is 54.03

The density of petrol is 0.70g/ml and LPG is 0.49g/ml

I have tried to do this question serveral times but i dont seem to get the right answer...any help will be appreciated.

...BTW my chemistry teacher thinks its a hard question.

If petrol sells 80 cents per litre, what would the price of LPG needed to be for it to have an equivalent price in cents per kilojoule as petrol?

petrol heat of combustion:5460 kj/mol

LPG heat of combustion 2220 kj/mol

Yes I will keep your explanation in mind...but the metal goes slippery too that’s is why there might be another explanation...I will try to ask my science teacher.

Thanks for your contribute