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cedrahasouneh10
16.11.2020 •
Chemistry
Write the condensed ground-state electron configurations of these transition metal ions, and state which are paramagnetic: (a) Mo3+, (b) Au+, (c) Mn2+, (d) Hf2+.
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Ответ:
1.39 g HCl
Explanation:
The balanced chemical equation for this reaction is given by
Zn(s) + 2HCl(aq) ---> ZnCl2(aq) + H2(g)
Convert the # of grams of Zn to moles:
1.25 g Zn × (1 mol Zn/65.38 g Zn) = 0.0191 mol Zn
Use the molar ratio to find the # of moles of HCl needed to react completely with the given amount of Zn:
0.0191 mol Zn × (2 mol HCl/1 mol Zn) = 0.0382 mol HCl
Convert this amount to grams:
0.0382 mol HCl × (36.458 g HCl/1 mol HCl) = 1.39 g HCl