Bell Curve Controversy
A packet of washing soda crystals have formed a white powder represented by the formula (Na(2)Co(3).xH(2)O) . the value of x may be found by dissolving a known quantity of the powder in water and titrating the solution with acid of known concentration. in an experiment a student weighed out 1.59g of the powder and […]
AgNO3 + NaCl ➡ AgCl + NaNO3 CaCO3 + 2HCl ➡ CaCl2 + H2O + CO2
it is an experiment and you will find the instructio in the pictures . Some Exercises require you to look at the book so I took pic that you need from the book. It is important that I need it by tomorrow morning. If you can not do it please do not put me in […]
A book describes a reaction as follows: Methane burns in oxygen to form carbon dioxide and water. What are the reactants in this ?
an irregularly shaped stone was lowered into a graduated cylinder holding a volume of water equal to 20.0 ml. the height of the water rose to 30.2ml. if the mass of the stone was 25.0g what was its density
what is Molar concept as define in chemistry?
a bottle of wine contains 750 mls of a 12% by volume acohol solution. how much heat would be generated by the oxidation of alcohol to acetate (the density of alcohol is .79 g/ml)
When a solution of sodium chloride reacts with a solution of silver nitrate, a new compound called silver chloride forms. This is insoluble so it forms a cloudy precipitate in the water. Which separation method would you use to obtain a pure sample of the silver chloride. Name the equipment you would need and explain […]
Electrochemistry Importance of Electrochemistry Electrolytes are of two types features of the electrochemical cell Electromotive Force (emf) of a Cell ……