Answer:(3)
Explanation: 2Al+3H2SO4----->Al(2SO4)3+3H2
They both have two electron shells. Period indicates number of shells.
Answer:

Explanation:
Given

Required
Convert to meters per minutes

Start by converting the speed from miles to meters

So, we have:


Next, we convert time from hours to minutes

So, we have:


<em>Hence, the equivalent of 25 miles per hour is 670.56 meters per minutes</em>
The mass of 8 mol of ¹²C is 96 g.
Mass = 8 mol × (12 g/1 mol) = 96 g