What is the difference between 13.254 m/s and 7.7 m/s? Round your answer to the correct number of significant digits.

If 34.2 grams of lithium react with excess water, how many liters of hydrogen gas can be produced at 299 kelvin and 1.21 atmospheres? 2 li (s) + 2 h2o (l) yields 2 lioh (aq) + h2 (g)

Which is an example of a reversible physical change?

Which diagram represents the phase tha occurs after a solid melts?