El magnesio (Z = 12) tiene tres isótopos: el 78.70 % de los átomos del metal tienen 12 neutrones, 11.13 % tienen 13 neutrones y 10.17 % tienen 14 neutrones. Calcule la masa atómica relativa promedio aproximada del magnesio.

Which of the following is true for the actual yield of a reaction? it is always calculated as a ratio. it is the yield from the excess reactant. it is the yield from the limiting reactant. it is always less than the theoretical yield.

21. consider the following chemical reaction: n2+ o2 2 no if 10.0 g of n2 reacts with excess oxygen then how many grams of no can be formed? a) 10.7 g b) 21.4 g c) 32.9 g d) 42.8 g page 4 of 8

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