- Simplify ( 3 + i )( 5 - 2i )?

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A molecule with 4 pairs of electrons around the central atom & pyramidal shape, how many lone pairs of electrons does the central atom have? When a tiger has a bite hold of my neck how do I get out of it? Please help me with chemistry? Calculate the volume in liters for each of the following? 5.00 moles of NaOH from a 12.0 M NaOH solution? Consider the equation cos(2.00t) = -0.1. Find the smallest possible solution in radians and round to 2 decimal places?