Using ice on your finger before poking it with a needle, or using a TENS unit for labor contractions are examples of :

The line notation, Al(s) | Al3+(aq) || Co2+(aq) | Co(s), indicates that (MTS 7/18/2020)

Choose the true statement. (MTS 7/14/2021)

Choose the false answer (MTS 7/13/2021)

Which of the following can be prepared by electrolysis of their aqueous salts: aluminum, chromium, magnesium, platinum, fluorine, iodine, sulfate (MTS 7/21/2020)

The scenes below depict three gaseous mixtures in which A is reacting with itself to form A2. Assume that each particle represents 0.10 mol and the volume is 0.10 L.     (a) If K = 0.33, which mixture is at equilibrium?  [a] (b) Rank the mixtures from the most positive ΔG to the most negative ΔG. (example: 123) [b]

What substance is produced at the anode during the electrolysis of a mixture of molten calcium bromide, CaBr2(l), and molten magnesium iodide, MgI2(l)? Assume standard conditions. [1] What substance is produced at the cathode during the electrolysis of a mixture of molten calcium bromide, CaBr2(l), and molten magnesium iodide, MgI2(l)? Assume standard conditions. [2] (MTS 7/13/2021)

Balance the following skeleton reaction(if the coefficient is 1, put 1; if the coefficient is 0, put 0) and identify the oxidizing and reducing agents. For the oxidizing and reducing agent, enter numbers and +/- directly for superscripts and subscripts. (eg. enter HCO3- for HCO3-, Cu2+ for Cu2+) P4(s) HPO32–(aq) + PH3(g) [1]P4(s) + [3]H+(aq) + [4]H2O(l)  [5]HPO32-(aq) + [6]PH3(g) + [7]H+(aq) + [8]H2O(l) (acidic)   Oxidizing agent: [9] Reducing agent: [10]

Consider the reaction that happens at [Temp] °C: [rct1]A + [rct2]B → [prd1]C + [prd2]D . Using the data from the table: A B C D   ΔHf0 (kJ mol-1) [dha] [dhb] [dhc] [dhd]   S0 (J mol-1 K-1) [sa] [sb] [sc] [sd] calculate ΔG0 (in kJ) of the reaction. (assume that values of ΔH and S do not change with the temperature) Enter a number with sign (+ or -) to 1 decimal place in kJ. (MTS 7/18/2020)

The scenes below depict three mixtures in which  A (orange) and B (green) are forming AB3. Assume that each molecule represents 0.10 mol and the volume is 1.0 L.     (a) If K = 8.0, which mixture is at equilibrium? [a] (b)  Rank the mixtures from the most positive