Calculate moles of 7g of magnesium
1 answer:
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Taking into account the reaction stoichiometry, 2.713 grams of aspirin are formed when 2.08 grams of salicyclic acid reacts.
<h3>Reaction stoichiometry</h3>In first place, the balanced reaction is:
C₄H₆O₃ + C₇H₆O₃ (Salicyclic Acid) →C₉H₈O₄ (aspirin) + C₂H₄O₂
By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:
- C₄H₆O₃: 1 mole
- C₇H₆O₃: 1 mole
- C₉H₈O₄: 1 mole
- C₂H₄O₂: 1 mole
The molar mass of the compounds is:
- C₄H₆O₃: 102 g/mole
- C₇H₆O₃: 138 g/mole
- C₉H₈O₄: 180 g/mole
- C₂H₄O₂: 60 g/mole
Then, by reaction stoichiometry, the following mass quantities of each compound participate in the reaction:
- C₄H₆O₃: 1 mole ×102 g/mole= 102 grams
- C₇H₆O₃: 1 mole ×138 g/mole= 138 grams
- C₉H₈O₄: 1 mole ×180 g/mole= 180 grams
- C₂H₄O₂: 1 mole ×60 g/mole= 60 grams
The following rule of three can be applied: if by reaction stoichiometry 138 grams of salicyclic acid form 180 grams of aspirin, 2.08 grams of salicyclic acid form how much mass of aspirin?
<u><em>mass of aspirin= 2.713 grams</em></u>
Then, 2.713 grams of aspirin are formed when 2.08 grams of salicyclic acid reacts.
Learn more about the reaction stoichiometry:
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Answer:
6.56 × 10²² atoms Xe
Explanation:
Step 1: Find conversions
Molar Mass Xe - 131.29 g/mol
Avagadro's Number: 6.022 × 10²³
Step 2: Use Dimensional Analysis
= 6.55911 × 10²² atoms Xe
Step 3: Simplify
We have 3 sig figs.
6.55911 × 10²² atoms Xe ≈ 6.56 × 10²² atoms Xe