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Balance the following redox equation in acid: VO2^+(aq) +Zn(s) --->VO^2+(aq)+Zn^2+(aq)
the first order decomposition of N2O5 at 238 K has a rate constant of 1.70 * 10-3. If the initial concentration of N2O5 is 2.88M,
the element boron has two naturally occurring isotopes with masses of 10.0129 amu and 11.0093 amu. what is the percent
NH3 is a weak base (Kb = 1.8 × 10-5) and so the salt NH4Cl acts as a weak acid. What is the pH of a solution that is 0.049 M in NH4Cl
What volume of O2 at 684mmHg and 37degree celsius is required to synthesize 22.0 mole of NO2.
Explain why the Rf values changed when the eluant was changed from 100% petroleum ether to a 95:5 mixture of petroleum ether-ethyl acetate. Why UV light is not a useful visualization technique in every circumstances?
a half-cell that consists of a copper wire in 1.00 m cuno3 solution is connected by a salt bridge to a half cell
Sodium thisulfate, Na2S2O3, is used as a fixer when developing photographic film. What is the mass in grams of Na2S2O3 needed to make 100ml of a 0.25 solution?
Many carbohydrate linkages are cleaved by hydrolytic enzymes, which is different from glycogen phosphorylase that uses phosphorolysis. There are two acceptable mechanisms for hydrolysis of the glycosidic bonds
100.0 mL of 1.020 M HCl and 50.0 mL of 2.040 M NaOH, each at 24.53ºC, are mixed in a Styrofoam cup calorimeter. What is the final temperature of the mixture if the heat of acid-base neutralization (?Hneut) = ?57 kJ per mole of H2O formed
A 100.0 g sample of a metal M is burned in air to produce 103.7 g of its oxide with the formula M2O. What is the atomic mass of the metal?
How many molecules of sucrose (table sugar), C12H22O11, dissolved in 450.0 g of water are needed to make a 1.30 m solution?
Calculate OH- of each aqueous solution using the following H3o+ A baking soda 1.0 X 10-8M B orange juice 2.0 X 10-4
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