Chemistry Forum

A typical Cl tablet is a homogeneous blend of sodium dichloroisocyanurate (NaDCC) with effervescent components. Crushing it to powder should not affect components distribution. Just take care to make new pills right away after crushing initial pill.

Hello! Pls, have a look at www.cas.org 127 million of various chemicals listed in there, along with some tools. As far as building useful website for chemists concerned, having no Artificial Intelligence at hand you will be limited to the basic tools: unit converters, simple equations etc. So, you w...

Do you really think the answer obtained on this forum can be used before the court of law?

Fe2O3 + Mg3(PO4)2 = 2Fe(PO4) + 3MgO 1 mol of Fe2O3 reacts with 1 mol of Mg(PO4)2. Mg3(PO4)2 - 262.86 g/mol 1.64 x 10^12g of Mg3(PO4)2 equals to 6.24 x 10^9 moles, same amount of moles of Fe2O3 needed - 6.24 x 10^9. Fe2O3 molar mass is 159.69 g/mol, so 6.24 x 10^9 moles of Fe2O3 weight 9.96 x 10^11 g.

"...what do we do..." I guess, first we to thank people for helping us: "благодарÑ!" )) Second, CH3COOH is a weak acid, therefore you, pls look for "acid ionization constant Ka" (should be provided). Third, H2SO4 - even "worse" )), as it dissociates in...

1) "... how to measure pH..." You could use pH testers. 2) Depending on the level of knowledge you are being tested for, "distilled water" may mean pH 7 or lower, say pH 5 - pH 6,5. 3) What is the pH of the solution that results when 10ml of 10^-5mol/l HCl is diluted to 10l with ...

Are you sure you are asked about CO2 moles. not about O2 moles? Anyway, given the starting quantity 7.2 moles of C6H14 is 3.6 times bigger than original 2 moles in the equation, you need 3.6 times of the original number of O2 moles: 3.6 x 19 moles = 68.4 moles of O2 Or, if the question "how man...

Cl2O7 + Mg(OH)2 = Mg(ClO4)2 + H2O

I guess, one very important condition is missing here - the mass of Zn. If you have got Zn in quantity lesser than 65.38 grams (1 mole of Zn), any amount of HCl can't help you to produce needed quantity of H. If you have exactly 65.38 grams of Zn, then ANY amount of HCl, equal or exceeding 36.45 x 2...

Have a look here: http://www.nature.com/sciam/search/executeSearch?sp-q-1=SCIENTIFICAMERICAN%2CSCIENTIFICAMERICANMIND&sp-q=quantitative+spectrum&sp-c=25&sp-m=0&sp-s=&sp-a=sp1001702d&sp-sfvl-field=subject%7Cujournal&sp-x-1=ujournal&sp-p-1=phrase&sp-p=all&submit...

No luck here. Liquid media needed to ensure free movement of the ions.

Yeah, to wear a wristwatch you need a watch wrist.
Durable wrist makes durable fist.
T-1000 is difficult to find yet, try hyper alloy from T-800 http://terminator.wikia.com/wiki/T-800.

For the wristwatch body I would go for ceramic. Not toxic.

If it is not said clearly in the terms and conditions that it is a "closed system", than the requirement "ignore the ice cube mass" can be a hint that the system is not a closed one. In this case the resulting water, after a certain time, will have "the temperature of the en...

Hi!

Heat sugar to melt. "Fry" it to desirable color, pour into a mould.
Mould surface to be oiled beforehand.

Packing material to change from solid to gas without becoming liquid and without leaving any residues not to contaminate the food? 1. Oxidation by oxygen. In a way, you are talking about flammable or even explosive material. It's difficult to imagine how to store and transport such packing material,...