how much HCl is needed to dissolve a 2.5grams iron bar on a padlock

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1. What mass of HBr (in g) would you need to dissolve a 3.7 −g pure iron bar on a padlock?
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2. What minimum mass of HCl in grams would you need to dissolve a 2.5g iron bar on a padlock?
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3. 3. Hydrobromic acid dissolves solid iron according to the following reaction:Fe(s) + 2HBr(aq) ---> FeBr2(aq) + H2(g) What mass
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4. Iron (III) hydroxide is soluble in acid:Fe(OH)3(s)3H^+(aq)-->Fe^3^+(aq)+3H2O(l) a. How many milliliters of 1.00 M HCl are needed
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