A solution that is formed by combining 400. mL of 0.20 M HNO3 with 600. mL of 0.10 M NaOH has an H3O+ concentration of

a. 0.20 M.

b. 0.10 M.

c. 0.060 M.

d. 0.020 M.

e. 5.0 ´ 10-13.

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asked by Fatima

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