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Calculate the reaction Zn(s) + 2HCl(aq) ! ZnCl2(aq) + H2(g) What mass of ZnCl2 (MW = 136.3 g/mol) can be prepared from the reaction of 3.27 grams of zinc (MW = 65.38 g/mol) with 3.00 grams HCl (MW = 36.46)?
What volume of hydrogen gas is produced when 83.8 g of iron reacts completely according to the following reaction at 25oC and 1 atm.
The average radius of a molecule of lyzosome, an enzyme in tears, is 1430 pm. What is it's radius in nanometers.
What is the relationship between coordination number, packing, and density (as mass/volume). How do the two more efficient forms of packing compare regarding volume.
Calculate the pH after 0.15 mol of NaOH is added to 1.00 L of 0.60 M HF and 1.01 M KF.
What mass of sucrose should be combined with 488 of water to make a solution with an osmotic pressure of 8.25 at 280.
Determine what would be the total ?nal pressure of the system in atmospheres If we completely hydrolyzed 0.18 kg of H2O in a 8.2 L container at 300 K?
Considering given equation as P4(s) + 5 O2(g) P4O10(s) where ΔH = -3013 kJ/mol you just need to compute the heat evolved when 436 grams of white Phosphorous (P4)burns in air according to the given equation as above.
Identifying an unknown hydrocarbon, Is it possible to identify what the hydrocarbon is with just knowing the volume of it (9.61 ml), the mass (7.669 g/ml), density (0.798 g/ml)?
Determine the final pH of a solution that is prepared by mixing 25 mL of 0.15 M sodium hydroxide( NaOH )with 20. mL of 0.20 M HA,( a weak acid with Ka = 2.3 x 10-6)?
A zero-order reaction has a constant rate of 3.20×10-4 . If after 60.0 seconds the concentration has dropped to 6.50×10-2 , what was the initial concentration?
What is the molarity (M) of a solution that contains 2.553 grams of NaOH (MM = 40.00 g/mol) in 81.11 mL of solution.
A basketball is inflated to a pressure of 1.50 atm in a 20.0C garage. What is the pressure of the basketball outside where the temperature is -5.00C.
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