Hi question, what number should I change the 9 to so it's balanced?

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)

George is a dalmatian puppy. describe what happens to light that allows you to see george’s black and white coat.

In apex! a liquid heated beyond a certain temperature becomes