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Enough of a monoprotic acid is dissolved in water to produce a 1.05 M solution. The pH of the resulting solution is 2.97. Calculate the Ka for the acid.
For each of the following pairs of ions, determine whether a precipitate would form when solutions containing these ions are mixed and write the formulas of any precipitates that should form. Indicate the color of any precipitate that should form.
HCl according to the following chemical equation? MnO2+4(HCl) --> MnCl2 + Cl2 + 2(H2O)
Nitrogen and hydrogen gases are combined at high temperatures and pressures to produce ammonia, NH3. If 104.7 g of N2 are reacted with excess H2, how many moles of NH3 will be formed?
If a laser operated on the n=5 to n=2 transition of a H atom, what wavelength in nm photon would be emitted? (E2= -82 kJ/mol, E1= -328 kJ/mol)
The molar mass of a protein is determined from a measurement of the osmotic pressure. If 0.01 grams of the protein is dissolved in 1 ml. and osmotic pressure
A student heated a 4.901 g sample of hydrated iron chloride. After heating, the anhydrous iron chloride has a mass of 3.010 g. Calculate the percentage by mass of water in the hydrated compound.
List five food product would give a positive iodine-starch test for carbohydrate mention somthing beside potato
A certain sample of the mineral galena weighs 12.4 and has a volume of 1.64 mL. What is the density of galena?
write a net ionic equation for the reaction of each antacid with aqueous HCl. include the state of each species. a)MgCO3 b)CaCO3 c)Mg(OH)2
The molar heat of fusion of water is 6.02 KJ/mol. Calculate the energy required to melt 16.6g of water.
if 0.100 m NaCl is added slowly to a beaker containing both .120m AgNO3 and .150m Pb(NO3)2 at 25 celsius which will precipitate first AgCl or PbCl2?
Chromium is produced by reacting its oxide with aluminum. If 76 grams of Cr2O3 and 27 grams of Al completely react to form 51 grams of Al2O3 how many grams of Cr are formed
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