How many mL of C2H6 at STP are needed to react with 45.0 mL of O2 at STP, according to the equation : 2C2H6 (g)+ 7O2 (g) = 4CO2 (g) + 6H2O (g)

The conventional equilibrium constant expression (kc) for the system below is: 2icl(s) ⇄ i2(s) + cl2(g) [cl2] ([i2] + [cl2])/2[icl] [i2][cl2]/[icl]2 none of the listed answers are correct [i2][cl2]/2[icl]

Which statement describes the phase change that occurs when dry ice is placed in an open container at room temperature?

Observation and experimentation have led many scientists to accept a theory about the origin of the universe. this theory is called the big bang theory. scientific evidence collected and observed by scientists around the world suggests that the universe is ever expanding from a hot and dense initial state. what makes this a scientific theory? (2 points)