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zinc metal is amphoteric and will react similarity to aluminum metal, dissolving in aqueous strong base. Write a balanced molecular equation for the reaction between zinc metal, NaOH, and water to produce Na2[Zn(OH)4] and hydrogen gas.
With regard to chromatography analysis, explane why peak area is usually preferred to peak height and how an internal standard is used and why it is useful.
A .117 gram sample of a metal reacts with hydrpchloric acid to produce 36.3mL od dry hydrogen gas. what is the equivalent weight of this metal.
what is the molarity of phosphoric acid in a solution that is 84% by mass phosphoric acid and has a density of 1.87 g/ml?
How many grams of methane CH4 must be combusted to heat 1.15 kg of water from 24.0 C to 93.0 C, assuming H2O as a product and 100% efficiency in heat transfer?
Find the absolute uncertainty of the following calculation and round the answer to the proper number of significant figures: 3.78(±0.04) x 6.23(±0.03) x 1023 = 2.3549 x 1024.
Calculating effective charges on I and Br, The iodine monobromide molecule, IBr, has a bond length of 2.49 Angstroms and a dipole moment of 1.21 D.
What volume of water vapor is created by the complete combustion of 38.7 liters of methane gas?
A reaction mixture initially contains 2.8 M H2O and 2.6 M SO2. Determine the equilibrium concentration of H2S if Kc for the reaction at this temperature is 1.3 × 10-6.
Describe the development of the modern periodic table. Include contributions made by Lavoisier, Newlands, Mendeleev, and Moseley.
What must be the concentration of PO43- to just start precipitation of Ag3PO4 in a 0.10M AgNO3 solution?
How many molecular orbitals are present in the valence band of a sodium crystal with a mass of 5.90g?
for the reaction Mg+2HCl yeilds H2+MgCl2, calculate the percentage yield of magnesium chloride if 100.g of magnesium react with excess hydrochloric acid to yield 330.g of magnesium cholride.
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