Determine the theoretical yield of h 2s (in moles) if 18 mol al 2s 3 and 18 mol h 2o are reacted according to the following balanced reaction. Al 2s 3( s) + 6 h 2o( l) → 2 al(oh) 3( s) + 3 h 2s( g).

What are the three stages of volcanic activity? a. active, magma, lava c. extinct, eruption, explosive b. eruption, quiet, explosive d. active, dormant, extinct

The graph shows a trend in an ecosystem over time caused by increased pollution in the region. what can you conclude from the graph? a. there’s lower biodiversity among birds. b. there’s a higher reproductive rate among birds. c. there’s a significant decline in the number of producers. d. other types of animals were unaffected by pollution.

Amedium water hose can fill a pool in 30 minutes. a larger water hose can fill the same pool in 20 minutes. if both hoses are turned on at the same time, how long will it take to fill the pool? -what equation can be used to solve this work problem? -how many minutes will it take both hoses to fill the pool?