Although the scientific method is a cyclic process, when investigating a problem for the first time, you must start somewhere. which of the following should be the first step in an investigation? draw conclusions collect data define the problem analyze the data

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Not a  mixture of two common elements that can be separated by physical means.

Answer:             1.0  × 10⁻⁵ msolution:                     as we know ph is given as,                                    ph  = -log [h⁺]and,                                    [h⁺]  =  10^-ph    (1)putting value of ph in eq. 1,                                    [h⁺]  =  10⁻⁵                                    [h⁺]  =  1.0  × 10⁻⁵ m