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How many grams of KCl are needed to prepare 0.5 moles of KCl solution? (Molar ma
How many grams of KCl are needed to prepare 0.5 moles of KCl solution? (Molar mass of KCl = 74.5 g/mol)
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Practice Questions
1 question
Q1
How many grams of KCl are needed to prepare 0.5 moles of KCl solution? (Molar mass of KCl = 74.5 g/mol)
37.25 g
74.5 g
148.5 g
18.5 g
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To find the mass, use the formula: mass = moles x molar mass. Thus, 0.5 moles x 74.5 g/mol = 37.25 g.
Questions & Step-by-step Solutions
1 item
Q
Q: How many grams of KCl are needed to prepare 0.5 moles of KCl solution? (Molar mass of KCl = 74.5 g/mol)
Solution:
To find the mass, use the formula: mass = moles x molar mass. Thus, 0.5 moles x 74.5 g/mol = 37.25 g.
Steps: 5
Show Steps
Step 1: Identify the number of moles of KCl you need, which is 0.5 moles.
Step 2: Find the molar mass of KCl, which is given as 74.5 g/mol.
Step 3: Use the formula to calculate mass: mass = moles x molar mass.
Step 4: Substitute the values into the formula: mass = 0.5 moles x 74.5 g/mol.
Step 5: Calculate the result: 0.5 x 74.5 = 37.25 grams.
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