N2(g) + 20,9 → 2N02 (9) AHrxn = kJ
Calculate the enthalpy change for the above reaction given the
following information:
N2(g) + O2(g) → 2N0 (9) AHưxn - 181 kJ
2NO(g) +0,9 2N02(g) AHrxn = -115 kJ
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Mary is conducting an experiment on how pollution affects plant growth. how can she ensure that her data are reliable?

Some familiar products contain some of the same types of atoms. for instance, the chemical formula for baking soda is nahco 3. the chemical formula for liquid bleach is naclo, and the chemical formula for table salt is nacl. which choice best describes why these three products have some of the same types of atoms in common?

Calculate the ph at the equivalence point for the titration of a solution containing 150.0 mg of ethylamine (c2h5nh2) with 0.1000 m hcl solution. the volume of the solution at the equivalence point is 250.0 ml. kb forethylamine is 4.7 × 10−4 .