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Chlorine has two stable isotopes, 35Cl and 37Cl. If a sample of chlorine has an average molar mass of 35.78764 g/mol, what percent of the sample is composed of the lighter isotope
The standard free energy of activation of a reaction A is 73.9kJ/mol-1 (17.7 kcal mol-1) at 298 K. Reaction B is one million times faster than reaction A at the same temperature. The products of each reaction are 10.0 kJ mol-1 (2.39 kcal mol-1) mo..
The reaction of iodide ion with hypochlorite ion, OCI - (the active ingredient in a chlorine bleach, such as Chlorox), follows the equation OCI- + I- OI- + CI- It is a rapid reaction that gives the following rate data: What is the overall order of..
Fe2O3(molar mass=159.7 g/mol) reacts with CO(molar mass= 28.0g/mol) according to the equation Fe2O3(s)+3CO(g)>>>> 3CO2(g)+2Fe(s). When 116g of CO reacts with excess Fe2O3, how many moles of iron will be produced
Identify the charged groups in the peptide shown below at pH=1 and at pH=7. What is the net charge of this peptide at these two pH values? val-met-ser-Ile-phe-arg-cys-tyr-leu
A 500mL solution contains 1.68g NH3 and 4.05g (NH4)2SO4. How many mL of 12M HCl is needed to change the pH to 9.00?
If 5 mL of the original unknown sample was diluted to 200 mL prior to analysis, what is the concentration of Li+ in the original solution?
A compound of a transition metal and iodine is 65.1% metal by mass. How many grams of iodine is present in 859 g of this compound?
Calculate the number of 5.70m NaOH must be added to 666 ml of a buffer that contains .0205m C2H4O2 and .0260m C2H3NaO2 to increase the ph to 5.75.
What mass (in grams) of solid sucrose (C12H22O11) would need to be added to 2000 grams of water to make an ideal solution with a boiling point of 102.9°C? (Kb for water is 0.512°C/m)
What are some methods done by latent fingerprints. What are some advantages and disadvantages to latent fingerprints?
what mass of aspirin can be prepared by reacting 5.00 g if salicylic acid with an excess of acetic
a first order reaction has a rate constant 0.00510.if we begin with 0.10 M concentration of the reactant , how much of the reactant will remain after 3 hrs?
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