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1. Give brief explanations (three or four lines) for the following in regards to chemistry.
a. The density of the electrolyte in a lead storage battery gives an indication of the extent of discharge.
The average concentration of strontium ion in seawater is 8.00 mg of strontium ion per kg of seawater. What is the molarity of the strontium ion if the density of the seawater is 1.025 g/mL.
If 0.0315 moles of perchloric acid are added to 250 mL of this buffer, what is the pH of the resulting solution?
Calculate the amount of heat required to completely sublime 53.0 g of solid dry ice CO_2 at its sublimation temperature. The heat of sublimation for carbon dioxide is 32.3
Calculate the energy change when one 235U nucleus undergoes the fission reaction 235U + n -> 142Ba + 92Kr + 2 n . The masses needed are 235U : 235.04 u; 142Ba : 141.92 u; 92Kr : 91.92 u; n : 1.0087 u.
Suppose that while titrating a vinegar sample with standard NaOH you misread the buret and the calculated NaOH volume is greater than the actual volume used. How will this error influnence the final calculated percentage of acetic acid in the vinegar..
The point in the titration when buffering is least efficient occurs at the stoichiometric point, or equivalence point, in the reaction. This point is often called a point of inflection because there is a shift in the curvature from convex to conca..
How many times faster will the reaction occur at 43^circ {rm C} than at 0 ^circ {rm C}? How many times faster will the reaction occur at 43^circ {rm C} than at 0 ^circ {rm C}?
You have 75.0 g of solute Q dissolved in 300-mL of water. The distribution coefficient between ether and water for solute Q is 8. a) How many extractions using 60-mL of ether each would you need to carry out to extract a total of 70.7 g (total) so..
Problem- Provide the structures of three other compounds that could also be utilized instead of benzonitrile to produce benzoic acid under alkaline hydrolysis conditions. Provide detailed mechanisms for each of these reactions.
What is the initial concentration (in M) when 17.8 mL of a iron(lll) chloride solution was diluted with 15.3 mL of solvent to a final concentration of 0.725 M? Assume the volumes are additive.
A researcher places 2 grams of lithium into a large beaker of water and catches the hydrogen gas being evolved. Since the water had a small drop of phenolphthalein indicator, the indicator turned a red color indicating that a base, lithium hydroxi..
what are the NGSS Crosscutting concepts between ionic/covalent compounds?
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