Chemistry
[H+] = 10^-2 = 0.01M 10 ml = 0.010L (0.01mol/L)(0.010L) = 0.0001 mole of H+ or HCl moles of Zn = (0.0001 mol HCl)(1mol Zn/2mol.HCl)= 0.00005 moles Zn Convert moles of Zn to grams
chemistry
3.15 mol / 0.250 kg = 12.6 mol/kg or 12.6 molal The boiling point of a solution is Tb = Tb(H2O) + deltaT = 100º + deltaT deltaT = Kb*m = (0.512deg.kg/mol)(12.6mol/kg) NOTE: C2H6O2 is not ethylene. It may be CH3-O-O-CH3 whose solubility could not be 12.6molal. It is a bad ...
Chemistry
Chemical means of fighting oil spills are generally detergents which break up big blobs of oil into small liquid drops that are dispersed and eventually broken down by bacteria. This involves a whole sequence of physical and chemical changes. You can't write a simple chemi...
Chemistry 2 Questions
1. sodium metal reacts (burns) in chlorine gas forming sodium chloride, NaCl. 2. The ability of water to dissolve ionic solids (most salts) and polar molecular compounds (sugars, alcohols, ammonia, etc) is because of its polarity and its ability to form "hydrogen bonds&qu...
college chemistry
KClO3 decomposes to KCl and O2 which it escapes. A sample of KClO3 that has had some decomposition will contain some KCl. A sample of this mixture could be dissolved in water and tested with AgNO3. Pure KClO3 would not produce a precipitate since AgClO3 is soluble in water. I...
chemistry
If anyone can prepare a 1 M solution of Mg(OH)2, I would like to see it. The solubility of of magnesium hydroxide in water is 12 mg/L. The Ksp is 4.5x10^-11.
chemistry
I assume the desired pH is 8.65 although you did not label it, as DrBob pointed out. Ka = [H+][NO2-] / [HNO2] [H+] = antilog(-8.65)=2.24x10^-9 (a basic solution) [OH-] = Kw / [H+] [OH-] = (1x10^-14)/(2.24x10^-9) = 4.47x10^(-6) Ka = [H+][NO2-] / [HNO2] = 4.5x10^-4 (looked up) K...
Chemistry
We need the chemical equation for the reaction between CH4 and O2. I assume it was: 2CH4 + 3O2 -->2CO + 4H2O To answer your question, 1. Divide 45.6g by the molar mass of CH4 to get the number of moles of CH4. 2. Divide 73.2g O2 by the molar mass of O2 to get the moles of ...
chemistry
The mass of 1 liter of water is very close to 1 kg q = (specific heat)*(mass)*deltaT specific heat of water = 4.18kJ/kg.C q = (4.18kJ/kg.C)(1.00kg)(85ºC-18ºC)
Chemistry
Salicylic acid which was probably used to make aspirin is a phenol. The negative phenol test indicates that all of the salicylic acid reacted. However, the aspirin produced was not pure. Impurities lower the melting point and make the melting point range wider. It would be har...
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