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What is the present value of $1,500 due in 4 years if the interest rate is 7% compounded semi annually.
A solution is prepared from 25.0g of benzene, c6h6 and 25.0g of an unknown compound. The freezing point of this solution is 4.3C. The normal freezing point of benzene is -5.12C/m. Determine the molar mass of the compound.
A mixture containing 0.432 mol He(g), 0.312 mol Ne(g), and 0.721 mol Ar(g) is confined in a 8.00 L vessel at 25 °C and a total pressure of 2.92 atm. Calculate the partial pressure in atm of the He gas.
A mixture of Ar and N2 gases has a density of 1.491 g/L at STP. What is the mole fraction of each gas
Potassium hydroxide is used to precipitate each of the cations from their respective solution. Determine the minimum concentration of KOH required for precipitation to begin in 2.8*10^-3 M Fe(NO3)2
Calculate the volume of H2(g) at 273 K and 2.00 atm that will be formed when 275Ml of 0.725 M HCl solution reacts with the excess Mg. Mg(s)+ 2HCl(aq)----> MgCl2(aq) + H2(g)
Draw the structure of Caffeine. Skeletal form only. Locate 2 bonds in the molecule that are obviously polar covalent.
HClO is a weak acid (Ka=4.0x10-8) as well as so the salt NaClO acts as a weak base. Explain what is the pH of a solution that is 0.028 M in NaClO
A 6280 g solution of chloroform and (CH3)2CO contains 1.22 kg of CHCl3. Calculate the mole fraction of chloroform in the solution.
Complete the reaction mechanism below for the first two steps of the dehydration of 2,3-dimethylpentan-2-ol.
a tank contains 150.0 g of co2 and 24.0 g o2 at a total pressure of 4.25 atm and a tempature of 25.0*C. Calculate the partial pressure of O2.
3AgNO3 + Na3PO4 --> Ag3PO4 + 3NaNO3 Silver nitrate and sodium phosphate are reacted in equal amounts of 200. g each. How many grams of silver phosphate are produced?
Calculate Ecell for a galvanic cell constructed from a beaker of 0.0025M HCl with a standard hydrogen electrode at 1atm of pressure
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