How many electrons in a silicon atom have n = 3 as one of their quantum numbers? how many electrons in a potassium atom have l = 0 as one of their quantum numbers? how many electrons in a mercury atom have n = 4 as one of their quantum numbers?

Modern pennies are composed of zinc coated with copper. a student determines the mass of a penny to be 2.482 g and then makes several scratches in the copper coaling (to expose the underlying zinc). the student puts the scratched penny in hydrochloric acid, where the following reaction occurs between the zinc and the hcl (the copper remains undissolved): zn(s) + 2 hcl(aq) → h2(g) + zncl(aq)the student collects the hydrogen produced over water at 25 °c. the collected gas occupies a volume of 0.899 l at a total pressure of 79 j mmhg. calculate the percent zinc (by mass) in the penny. (assume that all the zn in the penny dissolves.)

What is the mass of 2.00 l of an intravenous glucose solution with a density of 1.15 g/ml?

Maya wrote if you step to describe how carbon circulates between the atmosphere and living organisms