240g of Cobalt-60 is allowed to decay for 21 years, how much Cobalt-60 is left? (The half life of Co-60 is 5.26 years.) Please, enter your answer as a whole number with no units.

How many moles of air are there in a human lung with a volume of 2.4 l at stp? explain your answer

Indicate whether the specified alkyl halides will form primarily substitution products, only elimination products, both substitution and elimination products, or no products when they react with sodium methoxide. 1-bromobutane 1-bromo-2-methylpropane 2-bromobutane 2-bromo-2-methylpropane

Which statement describes james chadwick’s discovery.