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Sagot :
Answer:
1.25 M
Explanation:
In this case, the solute is C₆H₁₂O₆ and the solvent is H₂O.To find the molarity, you need to (1) convert the mass C₆H₁₂O₆ to moles (via molar mass), then (2) convert grams H₂O to liters H₂O, and then (3) calculate the molarity.
(Step 1)
Molar Mass (C₆H₁₂O₆): 6(12.011 g/mol) + 12(1.008 g/mol) + 6(15.998 g/mol)
Molar Mass (C₆H₁₂O₆): 180.15 g/mol
18.0 g C₆H₁₂O₆ 1 mole
------------------------ x ----------------- = 0.0999 moles C₆H₁₂O₆
180.15 g
(Step 2)
1,000 grams = 1 L
80.0 g H₂O 1 L
-------------------- x ------------------- = 0.0800 L H₂O
1,000 g
(Step 3)
Molarity = moles solute / volume solvent (L)
Molarity = 0.0999 moles / 0.0800 L
Molarity = 1.25 M
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