A mineral sample is analyzed for its cobalt and calcium content. A sample is dissolved, and then the cobalt and calcium are precipitated as Co ( OH ) 2 ( s ) and Ca ( OH ) 2 ( s ) . At what pH can Co ( OH ) 2 ( s ) be separated from Ca ( OH ) 2 ( s ) at 25 °C? Assume that an effective separation requires a maximum concentration of the less soluble hydroxide of 1 × 10 − 6 M .

the number of valence electrons for each molecule or ion is shown beneath the structure. remember hydrogen will not have more than two electrons. this hydrogen is part of a covalent bond (sharing two electrons). a double bond here would cause hydrogen to share four electrons with phosphorus.

i dont know the answe

the transfer of heat by electromagnetic radiation is called thermal radiation . it is usually carried out by electromagnetic waves in an energy range just below the visible spectrum, which is the infrared range.

so the answer would be radiation.

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