QUESTION 29 The PH of a solution whose Hydroxide ion concentration is 0.45M is: A. 0.071
B. 0.347
C. 13.65
D. 12.48
E. 12.7
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In an investigation that uses the scientific method, which step immediately follows making a hypothesis? o summarizing the results o asking a question o making observations designing an experiment mark this and retum save and exit next submit

Using data from seismic waves, geologists have learned that earth’s interior is made up of several

The table compares the number of electrons in two unknown neutral atoms. comparison of electrons atom number of electrons a 10 d 11 use this information to determine the number of valence electrons in the atoms. which of the following correctly compares the stability of the two atoms? both are unreactive. both are highly reactive. a is unreactive and d is reactive. a is reactive and d is unreactive.