U 2
7
How many moles of H, gas
are released when 3.85 moles of
HCl react with excess aluminum?
2A1 + 6HCI – 2AICI, + 3H2
6
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Which of the following pairs of elements belong to the same groupa. h and he b. li and bec. c and pb d. ga and ge

As you watch a surfer ride a wave towards the shoreline, what is the shoreline? a) displacement reference b) reference point c) coordinate plane d) cartesian boundary

Astudent is trying to create a table that compares hypotheses, theories, and laws. hypothesis theory law do scientific researchers formulate it? yes yes yes does it explain why things happen? yes yes no yes yes yes is it used to make predictions? no yes yes which of the following questions would most likely fill the blank in the table? is it an intelligent guess? is it newly formulated? is it based on observations? has it been proved?