What mass of mgf2 is contained in 80.85 g of a 22.4% by mass solution of mgf2 in water?
2 answers:
Answer : The mass of contained is, 18.1104 grams
Solution : Given,
Given mass of solution = 80.85 g
22.4% by mass solution of means that 22.4 grams of
present in 100 gram of solution.
As, 100 grams of solution contains 22.4 grams of
So, 80.85 grams of solution contains grams of
Therefore, the mass of contained is, 18.1104 grams
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Answer:
7.5 g
Explanation:
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<em>Ammonium phosphate ((NH₄)₃PO₄) is an important ingredient in many fertilizers. It can be made by reacting phosphoric acid (H₃PO₄) with ammonia (NH₃). What mass of ammonium phosphate is produced by the reaction of 4.9 g of phosphoric acid? Be sure your answer has the correct number of significant digits.</em>
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Step 1: Write the balanced equation
H₃PO₄ + 3 NH₃ ⇒ (NH₄)₃PO₄
Step 2: Calculate the moles corresponding to 4.9 g of phosphoric acid
The molar mass of phosphoric acid is 98.00 g/mol.
Step 3: Calculate the moles of ammonium phosphate produced from 0.050 moles of phosphoric acid
The molar ratio of H₃PO₄ to (NH₄)₃PO₄ is 1:1. The moles of (NH₄)₃PO₄ produced are 1/1 × 0.050 mol = 0.050 mol.
Step 4: Calculate the mass corresponding to 0.050 moles of ammonium phosphate
The molar mass of ammonium phosphate is 149.09 g/mol.