Multiple Choice
When FeO reacts with 1 mole of O_2 to form Fe_3O_4, how many moles of Fe_3O_4 can be produced, assuming excess FeO is present? (Reaction: 6 FeO + O_2 → 2 Fe_3O_4)
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3. Chemical Reactions
Stoichiometry
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When 1 mol of Al2(CO3)3 completely dissociates in water, how many moles of ions are produced?
A
6 mol
B
4 mol
C
3 mol
D
5 mol
Verified step by step guidance1
Identify the chemical formula of the compound: Al\_2(CO\_3)\_3. This means the compound contains aluminum ions (Al\^{3+}) and carbonate ions (CO\_3\^{2-}).
Write the dissociation equation for Al\_2(CO\_3)\_3 in water:
\[Al\_2(CO\_3)\_3 \rightarrow 2Al^{3+} + 3CO\_3^{2-}\]
Determine the number of moles of each ion produced from 1 mole of Al\_2(CO\_3)\_3: 1 mole of Al\_2(CO\_3)\_3 produces 2 moles of Al\^{3+} ions and 3 moles of CO\_3\^{2-} ions.
Add the moles of all ions produced to find the total moles of ions: total moles of ions = moles of Al\^{3+} + moles of CO\_3\^{2-}.
Calculate the total moles of ions produced by summing the values from the previous step, which gives the total number of moles of ions released upon complete dissociation.
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