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1) Flame colours as an analytical technique :
a) The principle behinde how this work?
b) Example from different parts of the periodic table?
A pound of coffee beans yields 40 cups of coffee (4 cups = 1 ). How many milliliters of coffee can be obtained from 1.0 of coffee beans?
When a 2.047-g sample that contains only carbon, hydrogen, and oxygen burns in excess O2, the products are 3.80 g CO2 and 1.04g H20. What is the empirical formula of this compound
A 479-mL sample of unknown HCl solution reacts completely with Na2CO3 to form 12.1 g CO2. What was the concentration of the HCl solution?
The stereochemistry of the more highly substituted alkenes is difficult to define using the cis and trans designations. Therefore, a more systematic manner of indicating stereochemistry in these systems has been developed that uses an E and Z nome..
many home barbeques are fueled with propane gas rmc3 rmh8 .what mass of carbon dioxide in rm kg is produced upon the
A 1.200 gram sample of C7H6O2 was dissolved in 11.42 grams of lauric acid, and it was determined that the freezing point of the lauric acid was lowered by 1.680 Celcius.
What is the theoretical yield of PH3 when 150 grams of Na3P is mixed with 250 grams of H2O? If the actual yield is 30 grams, what is the % yield?
What is the purpose of grinding the magnesium before introducing it into the reaction flask?
50.0 ml of 0.987 M HCl was mixed with 50.0 ml of 1.02 M NaOH, the heat of neutralization was calculated to be -2.7 kJ. What is the enthalpy (molar heat) of neutralization?
If sealed glass bottle containing an organic solvent is dropped and breaks, pieces of glass may be propelled outwards because of build-up pressure that forms in the bottle. explain which is more dangerous a liquid pentane or liquid decane
Calculate the heat required (kJ) to convert 25.0 g of C2Cl3F3 from a liquid at 5*C to a gas at 82*C
what is the concentration in the solution of the first ion when the second one starts to precipitate at 25 C?
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