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How many mL of 4.50 M sodium hydroxide must be added to 250 mL of a 0.200 M acetic acid solution to make a buffer with pH = 5.00?
What is the boiling point of radiator fluid that is 50% antifreeze by mass? Ethylene glycol, the primary ingredient in antifreeze, has the chemical formula.
What is the freezing point of radiator fluid that is 50% antifreeze by mass? K_f for water is 1.86 C/m. Ethylene glycol, the primary ingredient in antifreeze, has the chemical formula C2H6O2.
Write the balanced redox half-cells and final equation for the reaction occurring in the titration.
Tris (pentaflourophenyl)borane, commonly known as BARF, is a polymerization initiator used in the manufacture of plastics. It is composed entirely of C, F, and B; it is 42.23% C by mass and 55.66% F
The density of this solution is 1.08 g/mL. Calculate the molarity, molality, weight percent, and mile fraction of the glucose solution.
Name 4 properties of a compound that is directly influenced by the polarity of the compond. And state the 2 most important factors that affect the polarity of a compound.
Given that the molar mass of H3PO4 is 97.994 grams, determine the number of H3PO4 needed to prepare 0.25 L of a 0.2M H3PO4 solution. What volume, in Litera, of a 0.2M H3PO4 solution can be prepared by
Super Glue is a polymer formed via an anionic polymerization of methyl cyanoacrylate, CH2=C(CN)CO2CH3. Predict the structure of this glue.
Explain why, in the sample calculations, 0.1 g of the unknown produced a GREATER freezing point depression than the same mass of naphthalene.
The freezing point of a solution of 0.10g of an unknown compound in 5.640g of camphor (Kf=37.7C/m) is 2.1 C lower than the freezing point of pure camphor. Calculate the molar mass of the unknown co
The reaction of 750.0 g each of NH3 and O2 was found to produce 562 g of NO. What mass of O2 is required to consume 750.0 g of NH3 ?
At a constant temperature, which of the following would be expected to affect the rate of a given chemical reaction?
What are these types of electrons called? Show the valence electrons in a molecule of water, and tell which ones are which.
Lakes that have been acidified by acid rain can be neutralized by the addition of limestone (CaCO3). How much limestone in kilograms would be required to completely neutralize a 5.2 * 109-L lake conta
Consider a 13.0% solution of sulfuric acid, H2SO4, whose density is 1.090 g/mL. Calculate the molarity of the solution.
If the thickness of the aluminum foil is uniformly 13 um, what area of aluminum foil (in cm^2) can be made? The density of aluminum metal is 2.969 g/cm^3.
Calculate the mass of lead ions per liter in this solution (assume the density of the water solution is 1.0 g/mL). What is the lead concentration in ppb?
Which of the following would have the lowest freezing point?
A solution containing 29.85 mg of an unknown protein per 25.5 mL solution was found to have an osmotic pressure of 3.85 torr at 21C. What is the molar mass of protein?
Teflon is produced from the polymerization of tetrafluoroethene. Write the structure of Teflon showing the monomeric unit in parenthesis.
What is the MOLAR heat of combustion of benzene, C6H6, if the combustion of 1.00g of BENZENE CAUSES THE TEMPERATURE RISE OF 5.18 deg C in a bomb calorimter that has a heat capacity of 8.07 kj/deg C?
Calculate the solubility of N2 in mol/L if its partial pressure is 1520 mmHG. Calculate the solubility when the N2 partial pressure is 20 mmHG.
To isolate caffeine from tea, Dora forgot to evaporate methylene chloride (15 ml) before adding the acetone and petroleum ether to crystallize the final product from material containing traces of c
What are the conditions favoring maximum conversion from reactant to product in terms of temperature and pressure?