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A flask filled with ethanol at 20.0 degree C has a total mass of 61.742 g. The flask is emptied and some ball bearings with a mass of 21.784 g are added to the flask. The flask is topped off with ethanol and now the total mass is 81.604 g. Calculate the density of the ball bearings at 20.0 degree C. The density of ethanol at this temperature is 0.78945 g/cm^3.
Calculate the volume of N2 produced at 21 degrees C and 823 mmHg if 60.0 g of sodium azide reacted
Calculate the pH of the acid solution before any NaOH has been added. Calculate the pH of the analyte after 10.00mL of 0.100 M NaOH has been added. Calculate the pH of the analyte of the equivalence point? Calculate the pH of the analyte after add..
What is the percent yield of CO2 if the expected theoretical yield is 8.11·10-3 mol? Vapor pressure of water at 20.0 oC is 17.55 mmHg .
There are several reagents that can be used to effect addition to a double bond including: acid and water, oxymercuration-demercuration reagents, and hydroboration-oxidation reagents
A (n) 8.54 - mol sample of carbon monoxide was stored in a 30.0-l container at 49.9 c . What is the pressure of the carbon monixide in the container.
Calculate the number of grams of NO2( molar mass=46.01 g/mol) gas inside a .500 L container at STP.
given that the molar enthalpy of vaporization delta h for H2O(l) is 44kj at 298k, what is the standerd enthalpy change for the reaction 2H20(G)+ O2(g)---->2H2O(G)?
How many grams of sodium benzoate should be added to prepare the buffer? Neglect the small volume change that occurs when the sodium benzoate is added
Are we concerned with the amount of sample that we use in this experiment and list at least three pros and cons for using a small sample under 0.05g and a large sample over 2.0g
Are these analyses correct? (i.e. are the charges balanced?) What partial pressure of CO2 would be at equilibrium with this water
Use the periodic table to write electron configurations for each of the following elements. Represent core electrons with the symbol of the previous noble gas in brackets. For example, [He]2s^2 2p^2.
Solve an equilibrium problem (using an ICE table) to calculate the of each of the following solutions. 0.15 M HF, and a mixture that is 0.15 M in HF and 0.15 in NaF
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