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The figure represents the initial contents of a reaction vessel mixture of nitrogen monoxide (NO) and oxygen (O2) at a pressure of 1 atm. Keeping the volume and temperature constant, what are the final total pressure (Ptot) and partial pressure of nitrogen dioxide (PNO2) when the reaction is complete (assuming a 100% yield)? 2NO(g) + O2(g) → 2NO2(g)  

How many protons, neutrons, and electrons are in one atom of ?

Which aqueous solution will have the highest freezing point?

What is the percent yield when 1.72 g of H2O2 decomposes and produces 375 mL of O2 gas measured at 42 oC and 1.52 atm?  The molar mass of H2O2 is 34.02 g/mol. 2H2O2(aq) → 2H2O(l) + O2(g)  

Which sample will reach the lowest final temperature when all samples evolve 12.5 J of heat and all begin at the same initial temperature? The specific heat of iron is 0.449 J/g·°C and the specific heat of copper is 0.385 J/g·°C.  

What innovation in art was Marcel Duchamp NOT responsible for?

Aquamarine is a mineral called Beryl. What is the empirical formula of aquamarine if it contains 3.3% beryllium, 6.6% aluminum, 54.9% silicon, and 35.2% oxygen by mass?

Rank the species from most to least soluble in water. Ba(NO3)2, Ksp = 4.64×10–3 Cd(OH)2, Ksp = 7.20×10–15 FeCO3, Ksp = 3.13×10–11

The reaction is run at two temperatures where temperature 1 is lower than temperature 2. Which relationship is correct for either rate constant (k1 or k2) or activation energy (Ea,1 and Ea,2)?

What is the ground-state electron configuration for the phosphide ion (P3–)?