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Leroy asked in Science & MathematicsChemistry · 11 months ago

What volume of 0.250 M NaCl contains 26.8 g NaCl? 107 L 0.459 L 8.72 L 9.33×10-3 L 1.83 L?

Update:

Disregard the title after the first sentence, these are the answer choices.

107 L

0.459 L

8.72 L

9.33×10-3 L

1.83 L

3 Answers

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  • 11 months ago

    What volume .....

    • Simply use the unit-factor method (aka dimensional analysis). A one-line setup, with a single chain calculation. Set up the conversion factors so that you cancel out the units you don't want, and leave the ones you do. If the units work out, so will the calculation.

    26.8g NaCl x (1 mol NaCl / 58.45g NaCl) x (1L / 0.250 mol NaCl) = 1.83L

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  • 11 months ago

    0.250 M NaCl means 0.25 mol/L

    NaCl is 58.44 g/mol

    26.8 g / 58.44 g/mol = 0.4586 mol

    0.4586 mol / 0.25 mol/L = 1.83 L

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  • 11 months ago

    I do not know that one.

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