In yonkers, there is an average of 710 people per square mile (mi? ) and 0.72
telephones per person. what is the average number of telephones in an area of 5.0 km²
? (1 mi? = 2.59 km)

Alab technician needs to create 570.0 milliliters of a 2.00 m solution of magnesium chloride (mgcl2). to make this solution, how many grams of magnesium chloride does the technician need? refer to the periodic table for . express your answer to three significant figures.