Introduction to Stoichiometry (P)
Cu + 2AgNO3 -> 2Ag + Cu(NO3)2 How many moles of copper must react to form 0.854 mol Ag?
0.427 mol Cu
A chemist pumps hydrogen gas (H2) from a tank into a reaction vessel containing 0.734 mol O2. The gases react to form water. If all of the available O2 reacts, how many moles of H2 are used? 0.367 mol H2 0.734 mol H2 1.47 mol H2
1.47 mol H2
Consider the potassium permanganate reaction again. 2KMnO4 + 16HCl → 2KCl + 2MnCl2 + 8H2O + 5Cl2 How many moles of water are produced when 3.45 moles of KMnO4 react? Give your answer to the nearest 0.1 moles. ______ moles H2O
13.8
Potassium permanganate (KMnO4) reacts with hydrochloric acid (HCl) to form potassium chloride (KCl), manganese chloride (MnCl2), water (H2O), and chlorine gas (Cl2). The balanced chemical equation is 2KMnO4 + 16HCl → 2KCl + 2MnCl2 + 8H2O + 5Cl2. Select the correct ratios of each of the following substances. HCl:H2O = 1:1 16:8 8:16
16:8
Pb + PbO2 + 2H2SO4 ; 2PbSO4 + 2H2OWhat is the mole ratio of PbO2 to water? PbO:HO = 1:__
2
Potassium permanganate (KMnO4) reacts with hydrochloric acid (HCl) to form potassium chloride (KCl), manganese chloride (MnCl2), water (H2O), and chlorine gas (Cl2). The balanced chemical equation is 2KMnO4 + 16HCl → 2KCl + 2MnCl2 + 8H2O + 5Cl2. Select the correct ratios of each of the following substances. KMnO4:KCl = 2:2 1:2 2:1
2.2
14KMnO4 + 4C3H5(OH)3 7K2CO3 + 7Mn2O3 + 5CO2 + 16H2OHow many moles of KMnO4 are consumed to form 0.886 moles of carbon dioxide? 2.48 13.29 0.177 How many moles of glycerin (C3H5(OH)3) are consumed in this reaction? 3.54 0.709 0.177
2.48 0.709
A chemist needs to find out how large of a container would be required to contain the products of an ammonia decomposition. If 8.91 mol H2 are produced during the reaction, how many moles of N2 are produced? 2.97 mol N2 26.7 mol N2 8.91 mol N2
2.97 mol N2
P4O10 + 6H2O -> 4H3PO4What is the mole ratio of water to H3PO4? Do not simplify the ratio.H2O:H3PO4 = ___:4 How many moles of water are consumed if 0.729 mol H3PO4 are produced? 6.00 4.00 1.09 4.37
6 1.09
3Al + 3NH4ClO4 → Al2O3 + AlCl3 + 3NO + 6H2OHow many moles of water are produced from 373 mol Al? How many moles of AlCl3 are produced?
746 124
2Fe + 3Cl2 → 2FeCl3which of the following options gives the correct reactant:reactant ratio? Fe:Cl2 = 1:1 Fe:Cl2 = 2:3 Fe:Cl2 = 3:2 Fe:FeCl3 = 1:1
Fe:Cl2 = 2:3
3.45 mol KMnO4 × (8 mol H2O / 2 mol KMnO4) Did you set up the equation correctly? Yes, and I got the correct answer. Yes, but I got the wrong answer because I made a mathematical error. No, I did not set up the equation correct
Yes, and I got the correct answer
