What mass of water (in grams) is necessary to convert 225g SiF4 to SiO2? SiF4 + 2H2O —> 4HF + SiO2

If two objects at different te,peraure are in contact with each other what happens to their 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)

If you need to add 27.50ml of a solution, which piece of glassware would you use to deliver this volume and explain how you would determine if the 27.50 ml was measured?