PLESE CAN SOMEONE JUST ANSWER THIS —————————————->
The half life of Rn-222 is 3.8 days. If a basement holds 60 grams of Rn, how much will remain after 22.8 days?

How many grams of naoh are needed to make 0.250 liter of a 0.500 m solution of naoh? 0.125 g 5.00 g 2.00 g

Tell me the iupac name of the following compounds:

2-bromo-2-methylbutane undergoes an e1 elimination reaction in the presence of ethanol. in the next reaction only one of the possible products is represented. although the product shown is not the major product of the reaction, notice that there is more than one way it can be produced. complete the mechanism and draw the missing substances.