Answer: A central nervous system stimulant
Explanation: arguably the most frequently ingested pharmacologically active substance in the world.
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<span> I got (a). The answer was 7.53. But when I try to solve (d), I keep getting the wrong answer. I subtracted the moles of NaOH from the acid and added the moles to the base. Then I did Ka = (x*([NaClO]+x))/([HClO - x) and then I found the pH</span>
Double replacement.
Ba(OH)2 + H2SO4 ====> 2H2O + BaSO4
Density
=mass÷volume
=277÷38
=7.29 g/cm3