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an empty flask has a mass of 123.4 grams. when the flask is filled with water, the mass is 211.6 grams. if 10 grams of zinc (density=7.14g/cm3) are added to the flask filled with water, what is the new mass of the flask?
Briefly explain why hydrogen atoms in methane are all in equivalent positions? B. Briefly explain why there are no structural isomers of propane (c3h8)
Propose stepwise sythesis of 2-cholor-4-nitrobenzoic acid starting from benzene
If 5.25mL of 0.1000 M NaOH solution is needed to just neutralize excess acid after 20.00 mL of HCl was added to 1.00 g of an antacid, how many moles of acid can the antacid counteract per gram?
A student wishes to establish experimentally the number of fungal particles in a fixed volume of air. He uses a liquid medium suitable for the growth of most fungi and exposes the liquid to air in a rectangular container of dimensions 15 cm × 15 c..
Sodium methoxide reaction: Pipet 1.65 mL of a 25% (by weight) solution of sodium methoxide in methanol into a 10 mL reaction flask.
The united states FDA requires that any product called vinegar contains at least 4% by weight of acetic acid. assuming that the density of vinegar is the same as water
What holds solids or liquids and carries out reactions? what is used to mix or combine two or more substances? what it used to support an iron ring or clamp?
working solution so you add five spatula tips full of salt to a large test tube and then make your working solution with only 5mL of deionized water.
A flask contains a mixture of Ne(g) and Ar(g). There are 0.250 mol of Ne(g) which exerts a pressure of 205 mmHg. If the Ar(g) exerts a pressure of 492 mmHg.
25 mL of 0.10 M HCl is mixed with 25 mL of .43 M NH3. What is the resulting pH?
Calculate the approximate molarity of this solution from the volume, percent composition, and density.
A solution is made by mixing exactly 500 mL of 0.180 M NaOH with exactly 500 mL of 0.100 M CH3COOH. Calculate the equilibrium concentration of the species
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