Answer:
He needs to add 4 mL of the 0.5 M solution to 6 mL of water.
Answer:
5400 cans
Explanation:
First we convert the total weight, 1 ton, to grams:

Now we need to know the mass of aluminum:

Now we make the relation between the mass of aluminum in 1 ton of the earth's crust and the mass of aluminum per can:

Metals are insulators and malleable. Hope this helps even though I'm late :)
The answer is 14.8 hoped this helped