Use the equation below to answer the following two questions.
2C2H6 + 7O2 ---> 4CO2 + 6H2O
8. How many moles H2O are produced when 94.5 moles C2H6 decomposes completely?
a. 185.3 moles
b. 267.5 moles
c. 31.5 moles
d. 283.5 moles

9. How many grams C2H6 are needed to completely react with 42 grams O2?
a. 11.1 grams
b. 137.55 grams
c. 0.37 grams
d. 142.08 grams

Achemist has dissolved a certain substance in water. the chemist knows that more of the substance could be dissolved into the water before it stops dissolving. therefore

The small bags of silica gel you often see in a new shoe box are placed there to control humidity. despite its name, silica gel is a solid. it is a chemically inert, highly porous, amorphous form of sio2. because water vapor readily adsorbs onto the surface of silica gel, it acts as a desiccant. despite not knowing mechanistic details of the adsorption of water onto silica gel, from the information provided you should be able to make an educated guess about the thermodynamic characteristics of the process. predict the signs for δg, δh, and δs for the adsorption of water.

The famous scientist galileo galilei did several experiments with sloping planes, which he rolled metal balls down so that he could study motion. by changing the slope, he could study how the speed at which the ball rolled was affected. what was the independent variable in galileo's experiment? a. the speed of the ball b. the slope of the plane c. whether the ball moved d. what the ball was made of