19.) Potassium chlorate (kclo3) decomposes to form potassium chloride and oxygen gas. If 5.4 moles of potassium chlorate decompose, how many moles of oxygen could be produced?
20.) What mass of fecl2 could be produced from 35.0g of fe and excess hci if the balanced reaction is Fe + 2hci --> fecl2 + h2
please help me answer either one o the other...Somehow show me how i could do the work also...
2007-12-07 08:13:52 · 1 answers · asked by Waqas A 2 in Science & Mathematics ➔ Chemistry
First, write a balanced equation for the reaction.
KClO3 --> O2 + KCl
From this, you see that 1 mol of KClO3 gives 1 mole of oxygen. So, 5.4 moles KClO3 will give 5.4 moles of O2.
For #20, Convert your mass of Fe into moles by dividing by the molar mass of Fe. Again, you have a 1:1 ratio of moles of reactant to moles of product, so you'll form that many moles of FeCl2. Finally, multiply the moles of FeCl2 by its molar mass to get grams of FeCl2.
2007-12-07 08:24:37 · answer #1 · answered by hcbiochem 7 · 0⤊ 0⤋