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Chemical A decays over time as a second order reaction. If the concentration after a time of 250 seconds is .0063 M, and the K of the reaction is .0955 / second, what was the initial concentration of chemical A? At what time would the concentration of chemical A reach .0045 M?
What mass of sucrose, in grams should be combined with 531g of water to make a solution with an osmotic pressure of 8.95atm at 315K
If 60.0 g of H3PO4 is dissolved in enough water to form 175 mL of solution, what is the molarity (M) of the solution
A resistive heater operating at 9V and 41is used to heat a 8g block of iron heat capacity.473 J/g*K). Explain how much time is necessary to increase the temperature of the block from 25oC to 44oC
An equilibrium mixture contains N2O4 ( 0.28 atm ) and NO2 ( 1.1 atm ) at 350 K. The volume of the container is doubled at constant temperature. Calculate the equilibrium pressures of the two gases when the system reaches a new equilibrium.
An unknown compound has a forula of CxHyOz. You burn 0.1523 g of the compound and isolate 0.3718 g of CO2, and 0.1522 g of H2O. What is the empirical formula of the compound?
What is the molarity of C12H22O11 in an aqueous solution that is prepared by dissolving a 28.07 g sample of impure C12H22O11 in water to make 1,175 mL of solution. Assume that the sample is 93% C12H22O11 by mass.
What pressure would the propane gas sample have at 75 mL? i answered 2.00 ATM what is the formula and how to do you calculate to get this answer.
given 20 grams of cs2 and 3 moles of o2 and the following reaction the amount of co2 produced is cs2 3o2 ? co2
The pressure in the stages is such that 8% by mass of the water entering the stage evaporates and leaves as fresh water. If the desalination plant wants to produce 1400.0 gallons of drinking water per day, how many gallons of brine must the plant ..
Value of E: 1.3 g x 1 mole/100.09=1.29 x 10-2 moleCaCO3 Using the value in your answer to question E., calculate the number of moles of HCl that two TUMS
a mixture containing 235 mg of helium and 325 mg of neon has a total pressure of 453 torr. what is the partial pressure of helium in the mixture?
What is the purpose of distilling two mixtures whose boiling points are very close.
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