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A sample of pure calcium fluoride with a mass of 15.0 g contains 7.70 g of calcium. How much calcium is contained in 45.0 g of calcium fluoride?
For which of the following would a dipole-dipole interactions play an important role in determining physical properties in the liquid state. a) BF3 b)ClF c) BeCl2 d)F2 e)CCl4
Metals Covalently Bonded to Benzene, I've noticed that my book does not mention metals as a possible substituent for mono-substituted benzenes, but it doesn't begin to explain why
Large jumps in ionization energy tend to occur whenever the removal of that electron disrupts an electron configuration ending in
a certain weak acid ha has a ka value of 5.8times10-7.1. calculate the percent dissociation of ha in a 0.10 m
Describe 3 types of marine life and how they are affected by the increase of acidity in the oceans.
Suppose that 33.55 g of ice at -12.9°C is placed in 54.72 g of water at 99.8°C in a perfectly insulated vessel. Calculate the final temperature. (The molar heat capacity for ice is 37.5 J K-1 mol-1 and that for liquid water is 75.3 J K-1 mol-1. Th..
a mixture of ar and n2 gases has a density of 1.592 gl at stp. what is the mole fraction of each
Determination of Molecular SO2 Needed for Protecting Wine, You have just finished fermenting a wine and the pH = 3.7. You need 2mg/L "molecular" SO2 to protect the wine. What level of free SO2 do you have to add to achieve the level of the molecul..
You have a choice of a p-20 ,p-100,p-200,p-1000,a 1mL serological pipette , and a 5mL serological pipette. Which one(s) would you choose to make this standard and why? Explain how you would calibrate the pipette(s) you choose.
Calculate the concentration of Iron(II) ions in a solution that contains 0.10M Fe(NO3)2 and 1.00M NaCN.
Aspirin that has been stored for a long time may give a vinegar odor and give a purple color with FeCl3, what reaction would cause this to happen
how many megajoules of energy in the form of heat can be produced per year (365 days) by the heater
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