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Old Iron Padlock Popular Q&A
Q: Why are chains on a padlock made of iron not aluminum?
A: lopo iu. Read More »
Q: What mass of HBr would you need to dissolve a 3.7 g pure iron bar...
A: 3.7 g Fe * 1 mol Fe/55.85 g Fe (molar mass) = .0662 mol Fe.0662 mol Fe * 2 mol HBr/1 mol Fe.132 mol HBr*80.912 g HBr/1 mol HBr=10.68 g HBr (or 11 using 2 sig fi... Read More »
Q: How much hcl in grams would you need to dissolve a 4.0 g iron bar...
A: 1) You need to determine the mole ratio between HCl(aq) and Fe(s) which happens to be 2:1. 2) Moles of Fe = 4.0 g x 1/55.8452 (mol/g) = 0.07162 mole Fe. 3) Mole... Read More »
Q: What minimum mass of HCl in grams would you need to dissolve a 2....
A: So the reaction process with 2:1 ratio HCl, you need to find how many mol of 2.1g iron bar is. Multiply that by 2 to get mol of HCl required. You can then buy m... Read More »
Q: 1.) what minimum mass of hcl in grams would you need to dissolve ...
A: moles Fe = 3.0 g / 55.847 g/mol=0.054. moles HCl = 2 x 0.054 = 0.11. mass HCl = 0.11 x 36.5 g/mol=4.0 g. moles H2 = 0.054. mass H2 = 0.054 mol x 2 g/mol= 0.11 g... Read More »