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When performing a mass to mass stoichiometry problem, explain why masses must be converted to moles rather than directly using the mass of reactants to predict the mass of products. Consider the synthesis reaction of Mg and O2 below. If equal masses of these reactants are allowed to react, explain how you would know which reactant is the limiting reactant and which reactant is the excess reactant. (Lesson 8)
2 Mg + O2 → 2 MgO
A weather balloon at Earth's surface has a volume of 4 L at 294 K and 746 mm Hg. If the balloon is released and the volume reaches 4.19 L at 715 mm Hg.
While 6.41 g of an unknown non-electrolyte is dissolved in 50.0 g of water the boiling point increased by 0.92 degrees C. If the Kbp of the solvent is 0.512 K/m, Compute the molar mass of the unknown solute.
The rod initially has a mass of 1460g, and the mole fraction of H2 in the exit gas is 0.223. The mole fraction of H2 in the feed to the reactor is 0.580, and the feed enters at the rate of 6.22kg-mol/hr. What will be the mass of the rod at the end..
What is the pH of a buffer prepared by dissolving 0.238 g of NaNO2 in 2.50 L of 1.5 x 10-3 M HNO2, Ka (HNO2) = 6.0 x 10-4?
if 105 of fluorine-18 is shipped at 800 a.m. how many milligrams of the radioisotope are still active if the sample
How much energy is required to completely vaporize a gallon jug of ice (128g) at 0C in 10 seconds? (in kilojoules)
In the ground state of the Hydrogen atom the energy of the electron is E0 = -13.61 eV. What is the energy of the electron in the ground state of the He+ ion
zinc reacts with iodine in a synthesis reaction. determine the theoretical yield if a 125.0g sample of zinc was used.
calculate the molarity of a solution of glycerol made by dissolving 69.000 ml glycerol at 15 degrees c in enough water
Org chemistry lab Q lab 2: why does the water solubility of the acidic compound change when going from the aqueous base to the aqueous acid.?? pls write the eq'n to illustrate this change
State whether each of the following is a physical or a chemical property of copper. has good corrosion resistance high melting point doesn't react with water reacts with oxygen
Question- Which one of the following is not a redox reaction? Answers: 2H2O2(aq) ? 2H2O(l) + O2(g) N2(g) + 3H2(g) ? 2NH3(g) BaCl2(aq) + K2CrO4(aq) ? BaCrO4(aq) + 2KCl(aq) 2Al(s) + Fe2O3(s) ? Al2O3(s) + 2Fe(s) 2H2O(g) ? 2H2(g) + O2(g)
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