- Differential equation: 3(xy'+ y) =(y^2)lnx?

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What is the mass of nitric acid that can be produced from 549g of ammonia? Please include steps so I can learn to do it on my own, thanks!? Calculate ΔE, if a system releases 66.9 kJ of heat to its surroundings while the surroundings do 44.0 kJ of work on the system.? Which way does the sun appear? Consider the reaction: 2 C2H6(g) + 7 O2(g) → 4 CO2(g) + 6 H2O(l) Calc ΔHrxn, if the combustion of 30 g of C2H6(g) releases 777 kJ of heat.? How do I solve for x here: (2x+26)*(2x+18)*x=? I d love to see working out so I can understand the steps needed to solve this. Thanks!?