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Chen drew a diagram to compare the ways in which different organisms obtain nitrogen. which label belongs to the area marked z?

Use this information to determine the number of calends electrons in the atoms. which of the following correctly compares the stability of the two atoms? a) both are unreactive b) both are highly reactive c) a is unreactive and d is reactive d) a is reactive and d is unreactive

Calculate the number of kilojoules to warm 125 g of iron from 23.5°c to 78.0°c.