Answers Chemistry Measures of Concentration: Molarity — QuizQuestion 4

4

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Measures of Concentration: Molarity — Quiz

Question 4 • Chemistry

Which solution is the most concentrated?

Answer

A

2 point 0 milliliters of 10 point 5 cap m cap h sub 2 cap o sub 2 , where cap h sub 2 cap o sub 2 has a molar mass of 34 g/mol

B

100 milliliters of 10 M NaCl , where NaCl has a molar mass of 58 g/mol

C

5 point 0 milliliters of 1 point 0 cap m cap p bSO sub 4 , where Pb SO sub 4 has a molar mass of 303 g/mol

D

2 point 0 milliliters of 10 cap m cap h sub 2 SO sub 4 , where cap h sub 2 SO sub 4 has a molar mass of 98 g/mol

Explanation

Concentration is given as molarity (moles per liter), so compare the stated molarities directly. Solution A is 10.5 M, while B and D are 10 M and C is 1.0 M. Therefore, the 10.5 M hydrogen peroxide solution is the most concentrated.

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