An important natural and metallic resource is ?

a) born
b)carbon
c) chlorine
d) platinum

Why are people not able to skip a dive to the deepest part of the ocean

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

Chemistry worksheet - i am not sure what they are asking for exactly?