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Based upon 3 SnF2 (ag) + 2 K3PO4 (aq)> Sn3(PO4)s (s) + 6 KF (aq), a 10.000 gram sample of toothpaste containing stannous fluoride gives a 0.145 gram precipitate of stannous phosphate. What is the percentage of SnF2 in the toothpaste sample?
How many grams of CaH2 are needed to generate 53.5 L of H2 gas if the pressure of H2 is 1 atm at 194 C.
Calculate the Gibbs free energy (in kJ/mol) at 80 degrees celsius. Assuming that the change in enthalpy is negligible over this temperature range
It takes 54.0 J to raise the temperature of an 8.00 g piece of unknown metal from 13.0rm ^circ C to 24.5^circ{C}. What is the specific heat for the metal?
Ethylene gycol has a density of 1.11g/mL. What is the volume of 30.0 g of ethylene glycol?
Determine the hydraulic conductivity and transmissivity of the aquifer and What would Q be if the hydraulic gradient
what mass of ammonium chloride can be added to 100 grams of water at 20 degrees C before the solution becomes saturated
25.0 ml of a 0.2450 M NH4Cl solution is added to 55.5ml of 0.1655 M FeCl3. What is H concentration of chloride ion in the final solution.
Calculate the osmolarity of this solution. my answer is 0.499 osm. Is that correct? 2*(.1249) + 1 (.2499)
Electron Donor and Receptor in Metal Complexes, In the first step of the catalytic cycle, the alkene bonds to palladium to make a new metal complex The alkene is now a ligand because the pi-bond of the alkene is donating some of its electrons to p..
The determination of iron in industrial waste stream is often carried out by reacting the water sample with o-phenanthroline to form a red-orange complex that absorbs at 510 nm.
A solution contains 0.021 M Cl? and 0.017 M I?. A solution containing copper (I) ions is added to selectively precipitate one of the ions. At what concentration of copper (I) ion will a precipitate begin to form? What is the identity of t..
A 486 mL sample of water was cooled from 50.0°C to 10.0°C. Assuming a specific heat of 4.184 J/K g and a density of 1.00 g/mL, find the amount of heat transferred from the water to the surroundings.
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