Which of the following represents the shortest wavelength? a) 6.3 x 10-5 cm b) 7350 nm c) 3.5 x 10-6 m

Pbco3 –> pbo+ co2. how many liters of carbon dioxide gas is produced from the decomposition of 32 grams of lead (ll) carbonate?

Which compound contains both ionic and covalent bonds? a) hbr b)cbr4 c)nabr d) naoh

Answer asap : ( a. how does mucus prevent the entry of pathogens? b. describe two ways white blood cells protect us from pathogens.