Are single called bacteria

Endeleev saw trends in the physical and chemical properties of elements when he organized them by

1) which of the following is the best example of a physical change? a) sugar dissolving in tea b) firefly glowing 2) in the combustion of ethane, what is/are the reactants? c2h6 + o2 ==> co2 + h2o a) c2h6 and o2 b) co2 and c2h6

What is the common name for the compound shown here? enter the common name of the compound shown?