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The reaction of soda ash (Na2CO3) with calcium sulfate in water is represented by the following chemical reaction: Na2CO3 + CaSO4 >>> CaCO3 + Na2SO4. Assuming that this reaction is complete and that there is 153 mg/l of CaSO4 initially present, what is the mass of soda ash that must be added to 1 liter of the water?
The decomposition of hydrogen peroxide is a first-order process with a rate constant of 1.06 x 10-3 min- 1. How long will it take for the concentration
The solubility product of PbBr2 is 8.9 X 10^(-6). Determine the molar solubility in the pure water.
Calculate the equilibrium constant at 0c and at 50c(assuming enthalpies of formation are independent of temp)
How much time is required to produce 200g of aluminum metal from molten aluminum oxide dissolved in cryolite, if you use a 12amp current
The melting point of a pure compound is 152-153 C. Describe the melting behavior for this compound if it is contaminated with 5% of an impurity.
In Breckenridge, Colorado, the typical atmospheric pressure is 514 torr. What is the boiling point of water (ΔHvap = 40.7 kJ/mol) in Breckenridge?
State the chemical composition of the sterol that is present in high levels in most people who belong to the high-risk group. Distinguish between the 'good' and 'bad' forms of this sterol.
Calculate the molarity of an NH3 solution made up of 37.5 g of NH3 in 70.0 g of water. The density of the solution is 0.982 g/mL
What was the applied pressure at the end of this process if the final concentrations of the solutions were 0.053 M and 0.150 M at a temperature of 23 degrees C
Explain how a competitive inhibitor inhibits an enzyme and how the effect is different from that of an irreversible inhibitor.
what percent of the fuel consists of the lighter isotope? Assume that the masses of the two isotopes are exactly 235 and 238 amu.
What mass of CaCl2 , when dissolved in 100.00 g of water, gives an expected freezing point of 5.0°C; CaCl2 is ionic? What mass of glucose would give the same result?
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