The radioactive isotope z has a half-life of 12 hours. after 2 days, the fraction of the original amount remaining is
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The number of H atoms in 3(NH₄)₂CrO₄ = 24
<h3>Further explanation </h3>The empirical formula is the smallest comparison of atoms of compound forming elements.
A molecular formula is a formula that shows the number of atomic elements that make up a compound.
(empirical formula) n = molecular formula
Subscripts in the chemical formula indicate the number of atoms
The compound of 3(NH₄)₂CrO₄ ( 3 molecules of (NH₄)₂CrO₄ ) :
Number of H :