Which of the following is the set of conditions under which a material becomes a supercritical fluid? A. real gas point
B. critical point
C. extreme point
D. triple point
(multiple choice)

Which statement describes both homogeneous mixtures and heterogeneous mixtures?

In the reaction between a crushed antacid tablet and vinegar what gas is emitted

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