I think it would be penicillin as it saved many lives in its time and ours.
V1M1 = V2M2
<span>V1 × 2.5 = 1 × 0.75,
so V1 = 0.75/2.5
= 0.3 </span>
(B), because 1.0 moles would be 6.02 x 10^23 molecules. So you have half a mole.<span>
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The molecular formula will be a multiple of the empirical CH2O. One unit of CH2O has a mass of 12+2*1+16 = 30 g. This means that if our compound has a molecular mass of 180 g/mol, we can divide 180 / 30 = 6 units, and our compound has 6 units of CH2O. This means that its molecular formula is C6H12O6.
The answer is sulfate pentahydrate
Hope this helps you :D