este X đơn chức có tỉ khối với H2 là 44. cho m gam X tác dụng với NaOH vừa đủ thu được 8,2g muối và 4,6g ancol. Tìm m

Write a hypothesis that answers the lesson question, “while observing a chemical reaction, how can you tell which reactant is limiting? ” hypothesis: if a substance is the limiting reactant, then . . because . .

Is a pencil falling to the floor anon contact force, a force, or a contact force

About 3% of the water on earth is freshest. only about 40% of that freshwater is available for human use. why is so much freshwater unavailable for human use?