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State whether q, w, deltaH, and deltaU are positive, negative, or zero for the following system. Include reasoning.
Reversible heating to make the phase transition from grey tin (solid, with density ρ = 5.57 g/cm^3) to white tin (solid, with density ρ = 7.31 g/cm^3) at constant pressure.
Transition metals can combine with carbon monoxide (CO) to form compounds such as Fe_x_(CO)_y. Assume that you combine 0.125 g of nickel with CO and isolate 0.364 g of Ni(CO)_x. What is the value of x
A solution contains 4.64g KCl in 178 mL of solution. The density of the KCl solution is 1.14 g/mL. What is the molarity,M, for the potassium chloride solution?
What is the molarity of a solution made by dissolving 45.3 g of potassium nitrate KNO3 in enough water to make 225 ml of solution
Give the number of atoms in the unit cell. Assume the structure consists of identical atoms. face-centered cubic a. one b. two c. four d. eight
What is the pH of a buffer solution that is 0.15 M chloroacetic acid and 0.10 M sodium chloroacetate? Ka = 1.3x10^-3.
At a temperature of 425 0C and a pressure of 735 mmHg, how many grams of {NH_3} can be produced when 4.40 L of {NO_2} react.
A compound is composed of elements C, H, and N. A 11.550-mg sample of the unknown compound was combusted, producing 31.332 mg of CO2 and 8.983 mg of H2O. What is the empirical formula for this compound
The equilibrium constant Kc for the following reaction PCl3(g) + Cl2(g) PCl5(g) equals 49 at 230°C.If 0.70 mol of PCl3 is added to 0.70 mol of Cl2 in a 1.00-L reaction vessel at 230 degrees Celcius, what is the concentration of PCl3 when equilib..
Rotenone, antimycin A and cyanide are poisons that inhibit the electron flow through respiratory chain. Rotenone inhibits the electron flow through NADH-Q oxireductase. Antimycin A blocks electron flow between cytochrome b and c1. Cyanide blocks e..
53.576g of MgSO4 2H2O are dissolved in 250.00 mL of 1.50 M Ba(NO3)2 solution to produce barium sulfate precipitate. How many grams of barium sulfate were formed after the reaction
Aqueous solutions of ammonium sulfide, (NH4)2S, and Hg(NO3)2 react to produce HgS and NH4NO3. a. Write the overall balanced equation for the reaction. Indicate the state (s, aq) for each compound. b. Name each compound. c. What type of reaction is..
calcium nitrate and ammonium fluoride react to form calcium fluoride dinitrogen monoxide and water vapor. what mass of
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