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When doing the Recrystallization of benzoic acid. Is it better to use just water as the solvent or with methanol and water as a solvent pair? Why and what are the differences?
Bleach is a dilute solution of NaOCl in water. The density of bleach is 1.05g/ml. If the percent by mass of NaOCl is 6% what is the [NaOCl]
Draw the structures and then List the following alkyl halides in order of their increasing reactivity as substrates in SN2 reactions
determine the heat released when (ethene) CH2 CH2 reacts with hydrogen gas and form CH3CH3.If Bond enthalpies given are H H : 436 kJ/mol,C Br : 276 kJ/mol,C C : 612 kJ/mol,C C : 348 kJ/mol,C H : 412 kJ/mol;
How many moles of ammonia are present originally? What is the theoretical yield of sodium bicarbonate in grams?
A gas mixture is made by combining 7.9 g each of Ar and Ne and an unknown diatomic gas. At STP the mixture occupies a volume of 18.73 L.
If 450g of acetone is reacted with 650g of benzaldehyde and it yields 350g of the product what is the percent yield? Show your calculations.
The 13C nucleus is a spin 1/2 particle, which means it can orient in two directions in a magnetic field (with the field and against it). The difference in energy between the two orientations is given by:
After about five minutes of mixing, the final temperature of the solution inside the calorimeter reached 37 C. Calculate the heat capacity of the calorimeter (J/C - joules per degree).
What are the advantages of laser. Can you explain why blue laser technology is the most challenging wavelength to develop in the photonics industry
The combustion of ethene, C2H4 , occurs via the reaction C2H4 (g) + 3O2(g) ===> 2CO2(g) + 2H2O(g) with heat of formation values given by the following table
Consider following cell. SCE stands for the saturated calomel reference electrode, which has a fixed potential of 0.244 volt.
Calculate the mass of water produced when 9.11 G of butane reacts with excess oxygen. Express the mass of water numerically in grams.
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