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what is the [H3O+] of a solution with a pH 1.26? Input answer in scientific notation...

what is the [H3O+] of a solution with a pH 1.26? Input answer in scientific notation with E representing x 10. For example, the number 8.4 x 10-4 would be entered as 8.4E-4.

Calculate the value of the equilibrium constant, K, using the reaction below and the given concentrations at equilibrium. Answer using two significant figures.

H2 (g) + Cl2 (g) ↔ 2 HCl (g)

[ H2] = 0.75 M

[ Cl2] = 0.96 M

[ HCl] = 6.0 M

How many grams of NaOH (MM = 40.0 g/mol) are needed to make 0.314 L of 0.494 M NaOH?

   g NaOH

Calculate the concentration (in M) of a solution prepared by dissolving 16.3 g NaOH (MM = 40.0 g/mol) in enough water to form a 126 mL solution.

   M NaOH

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