The carbon bonds in organic compounds are:
a. covalent
b. ionic
c. intermediate

Chlorophyll a had the molecular formula c55h72mgn4o5 how many atoms are in this molecule

Areaction is first order. if the initial reactant concentration is 0.0200 m, and 25.0 days later the concentration is 6.25 x 10-4 m, then its half-life is:

To separate a mixture of hard candies nd marbles the most efficient method would be