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In the context of logical access controls, how are the terms “subject” and “object” related?

Suppose a Voltaic cell at standard conditions, runs on the reaction,  Sn(s) + Nr2+(aq)   à  Sn2+(aq) +   Nr(s) The standard cell potential, E°cell = 0.30 V. What is the new value of Ecell if the concentrations are changed to  [Sn2+] =  {M} M       and         [Nr2+] =  .30 M? Hint:  The voltage will be less than E°cell       Answer format:  Enter the answer in Volts but do not include the units.  Enter 2 sig figs in standard notation. 

What is the pH of a solution that consists of {HA} M HX and {A-} M X-? Use the value of Ka for HX from the table at the bottom of the page. Answer format:  Enter the pH using 3 digits in standard notation. 

What mass of metal X will be formed by passing {I} A through XNO3(aq) for {t} seconds? The molar mass of X is given in the Molar Mass Table at the bottom of this page. Answer format:  Enter your answer in grams but do not include the units.  Enter 2 sig figs in standard, not scientific notation.

Locate atom “a)” in the Atomic mass table at the bottom of the page.  Calculate the nuclear binding energy (in J/atom) for atom a). Answer format:   The answer will be in the form:  ___ x 10-12 J.  Only type the part that goes in the blank. Do not type “x 10-10 J”.  Round to 2 sig figs, do not round until the end of the calculation.

Refer to compound #2 in the list at the bottom of this page.  Convert {X} mole fraction of compound #2 in water to mass percent. Answer format:  Enter the mass percent in standard notation without the units or a % symbol.  Use 2 sig figs.  

Please use rate 3 in the data at the bottom of this page. For the reaction,   2J + 3K + Là 5M + 7N, if the concentration of K is decreasing at rate 3, what is the rate of increase of [M]?  

A reactant, R, is decomposing in a first-order reaction. If the initial concentration of R is {M} M, how much is left after 4.0 half-lives? 

Identify the missing information in the following radioactive decay series.  Matches may be used multiple times or not used at all.

All of the answers are true except one.  Which of the answers is FALSE regarding perturbations to a chemical reaction at equilibrium of the form: A(aq) + 3B(g)  2D(aq)        ∆H = 126 kJ/mol