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a) A mixture of aluminum and zinc weighing 1.67g was completely dissolved in acid to give 1.69L of hydrogen gas measure at STP. What is the weight of aluminum in the original mixture?
The equations are: 2Al + 6H^+ -> 3H2 + 2Al^3+ Zn + 2H^+ -> H2 + Zn^2+
b) Will indium display the photoelectric effect with UV light? With infrared light?
Which molecule: water or ethanol is "more" polar? (By "more polar" I mean which molecule will have a larger net dipole moment
what is the resonance energy of c6h6 and how do you find
For each of the following unbalanced equations calculate how many moles of the second reactant would be required to react completely with 0.413 mole of the first reactant. Al + H20SO4 ----> Al2(SO4)3 + 3H2
What is the molarity of a permanganate solution if it takes 10.0 mL of 0.200M iron(II) solution to completely react with 15.7 mL of the permanganate solution
What is the theoretical yield of aluminum oxide if 1.60 mol of aluminum metal is exposed to 1.50 mol of oxygen?
The rate constant for a certain reaction is k = 2.60×10-3 s-1 . If the initial reactant concentration was 0.200M , what will the concentration be after 14.0 minutes?
What is the volume of the gas at STP conditions? b.) What is the molar volume of the gas?
What is the concentration of Co2 ions at equilibrium? Assume the formation constant of Co(NH3)62 is 5.0× 1031.
What is the [OH-] in a solution that has a [H3O+] = 1 x 10-6 M?
3.8 g of a hydrocarbon fuel is burned in a calorimeter that contains 234 grams of water initially at 25.00 ? C. After the combustion, the temperature is 26.55 ? C
What is the concentration of the H 2 SO 4 if a chemist titrates 300.0 mL of Sodium Hydroxide NaOH with a 5.0 M solution of NaOH and needs only 3.4 mL of the base to reach the endpoint,?
The mass of a cube of iron is 284 g. Iron has a density of 7.87 g/cm3. What is the mass of a cube of lead that has the same dimensions?
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