Sulfuric acid dissolves aluminum metal according to the following reaction:
2Al (s) + 3H2SO4 (aq) --> Al2(SO4)3 (aq) + 3H2 (g)
Suppose you wanted to dissolve an aluminum block with a mass of 15.0 g.

What minimum mass of H2SO4 (in g) would you need?

What mass of H2 gas (in g) would be produced by the complete reaction of the aluminum block?

Explanation:

Hello,

Based on the given undergoing chemical reaction is is rewritten below:

By stoichiometry we find the minimum mass of H2SO4 (in g) as shown below:

Moreover, mass of H2 gas (in g) would be produced by the complete reaction of the aluminum block turns out:

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in scientific notation, the value of the  speed of light in a vacuum

  will be written as 2.995 * 10^8. when this value is represented in the form of

  a * 10^b, then, a = 2.995 and b = 8.

the value of the speed of light in a vacuum given above can also be rounded up to approximately 300000000. in this case, the scientific notation will be written as 3 *10^8.