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two mwthods were described for determining the volume of the flask used for the molar mass determination. which method will give a more precise determination of the volume? why
What are the steps to recrystallize an impure solid? Answer 1. Heating the water. 2. Dissolving the solute.3. Letting the solute cool.4. Collecting and washing the crystals.
5000 joules of energy are added to 108 grams of silver, Ag, at 20°C. What is the final temperature of the metal? (the specific heat of silver is 0.235)
calculate the pH of the resultant solution: (a) 0.00 mL, (b) 5.00 mL, (c) 25.00 mL, (d) 45.00 mL, (e) 50.00 mL, (f) 51.00 mL.
what is the total number of grams of patassium chloride needed to saturate exactlye 300 grams of water at 10 degrees celcius?
What is the molar mass of a covalent compound if 0.486 g of it is dissolved in 25.0 mL of water and produces a freezing temperature
Determine de yield or recovery percent in the synthesis of an adduct made with 0.10 mL of furan and 0.20g of maleic anhydride.
Write the formula for each of the following compounds, being sure to use brackets to indicate the coordination sphere.
Calculate the pH at the equivalence point for titrating 0.250 solutions of each of the following bases with 0.250 M HBr
A 2kg sample of lead is heated from a temperature of 30 degrees celsius to a temperature of 60 degrees celcius. The specific heat of lead is 128 J/kg degrees celsius. How much heat energy di this sample absorb?
Important information about Organic Chemistry, The most reasonable formula for a compound demonstrating M+ =101 with a minor M+1 peak is
its molar mass is 71.61 g/mol, how many grams of this compound must you burn to release 866.80 kJ of heat?
What is the pH of a buffer solution prepared from 5.15g of NH4NO3 and 0.10L of 0.15M NH3? What is the new pH if the solution is diluted with pure water to a volume of 500mL
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