Identify the ion ratios needed to form neutral compounds from the ions below. The metal ion (cation) is listed first, and the nonmetal ion (anion) is listed second. Make sure to give each ratio in its most simplified form. Na+:Br– = 1 : Al3+:Cl– = 1 : Mg2+:O2– = 1 : Al3+:O2– = 2 :

Asample of silver (with work function ? = 4.52 ev) is exposed to an ultraviolet light source (? = 200 nm), which results in the ejection of photoelectrons. what changes will be observed if: silver is replaced with copper (? = 5.10 ev) more photoelectrons ejected no photoelectrons are emitted fewer photoelectrons ejected more energetic photoelectrons (on average) less energetic photoelectrons (on average)

22. a flask containing 450 ml of 0.50 m h2so4 was accidentally knocked to the floor. how many grams of nahco, do you need to put on the spill to neutralize the acid according to the following equation: h2so4(aq)+2 nahcos(aq) na, so(aq) +2 h20()+2 co2(g) d) 38 g a) 2.3 g b) 9.5 g c) 19 g

Select all of the methods through which a drug can enter your body. injection swallowing inhalation absorption