The area of a telescope lens is 6.439 × 103 mm2. (a) What is the area in square feet (ft2)? Enter your answer in scientific notation. (b) If it takes a technician 43.5 s to polish 1.53 × 102 mm2, how long does it take her to polish the entire lens?

Phosphorous can form an ion called phosphide, which has the formula p3−. this ion can form an ion called phosphide, which has the formula p3−. this ion properties very similar to those of pforms when a phosphorus atom loses three protonsis called a cationcontains 18 electrons

Why can water dissolve many ionic compounds

Type the correct answer in each box.balance the chemical equation.__ n203 ➡️ __ n2 +__ o2