You are a Pfizer vaccine scientist. You find that the most effect dose of vaccine is 3.00 E -7 g of mRNA injected into the deltoid muscle. How many particles of mRNA are in an effective dose of vaccine? The MM Vaccine = 1.388 E 6 g/mol ,

the reaction mixture contains some ammonia, plus a lot of unreacted nitrogen and hydrogen. the mixture is cooled and compressed, causing the ammonia gas to condense into a liquid. the liquefied ammonia is separated and removed. the unreacted nitrogen and hydrogen are then recycled back into the reactor .

the density of gold = 19.3 g/cm3

the relation between density and mass and volume is

density = mass / volume

given :

mass of gold = 13 g

density = 13g / volume = 19.3

volume = 13 /19.3 = 0.67 cm^3

thus volume of gold nugget = 0.67 cm^3