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1. What is the oxidation number of Sulfur in the ionic compound K2SO4? Explain.
2. The solubility of Mg(OH)2 Salt increases by decreasing the pH. Explain by writing chemical reactions.
3. When KBr (Potassium Bromide) added to pure water, the pH will not change. Why?
4. A second-order reaction has a half-life of 18s when the initial concentration of reactant is 0.71 M.
a) Calculate the rate constant for this reaction.
b) How long of time (in seconds) will it take for the initial concentration to drop from 0.71 M to 0.5 M?
c) What is the half-life of the reaction, if one starts with 0.1 M solution?
Which of the following is a use for nuclear energy?
Problem- If I was given data for concentration of mmol/ L and s being the extent of adsorption in mmol acetone/ g charcoal at a given temperature how do i use a regression in excel to determine if it fits the langmuir or freundlich isotherm. what ..
celcius have enough energy to overcome the activation energy barrier for a particular reaction, what is the activation energy for this reaction
Instant cold packs, often used to ice athletic injuries on the field, contain ammonium nitrate and water separated by a thin plastic divider. When the divider is broken, the ammonium nitrate dissolves according to the following endothermic reaction:
Magnesium carbonate has a ksp value of 6.80×10?6 . What happens when magnesium and carbonate solutions are mixed to give 2.50×10?3 M Mg^2+ and 2.00×10?3 MCO3^2-
Consider the reaction Fe + Sn^2+(1 x 10^-3 M) ? Fe^2+ (1.0 M) + Sn. Calculate the voltage theoretically generated by the cell.
the addition of bromine to an equimolar mixture of cis- and trans-2-butene generates only three stereoisomers. Explain.
1.If 2.47 g of salicylic acid is reacted with 61 mL methanol, what is the maximum mass of product (oil of wintergreen) that could be formed?
What is the value of the rate constant at the temperature of this experiment? Give an answer with concentration units of molarity and time units of seconds.
Dehydrohalogenation of (2R, 3R)-2-bromo-3-methylpentane by a bimolecular reaction produces only (E)-3-methyl-2-pentene and 3-methyl-1-pentene as products. Provide a mechanistic explanation as to why (Z)-3-methyl-2-pentene is not formed.
The atmosphere on the planet Venus exerts a pressure of 90.0 atm at the surface, at a temperature of 900 Fahrenheit. If an interplanetary vehicle goes to Venus.
in the alkylation of cyclopentanone better yields are obtained by first reacting cyclopentanone with an equivalent of
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