What is the mass (g) of 3.20 x 10 24 atoms of Silver?
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What is the relationship of air masses and the temperature of oceans?

Joan writes four numbers on the board in standard form, and then she writes their scientific notation

The activation energy for the reaction no2(g)+co2(g)⟶no(g)+co(g) is ea = 300 kj/mol and the change in enthalpy for the reaction is δh = -100 kj/mol . what is the activation energy for the reverse reaction?