2. If a compound contains \( 40 \% \) sulfur and \( 60 \% \) oxygen by mass, what is the empirical formula of the compound? (Atomic masses: \( S=32 \mathrm{~g} / \mathrm{mol}, 0 \) \( =16 \mathrm{~g} / \mathrm{mol} \) )

2. If a compound contains \( 40 \% \) sulfur and \( 60 \% \) oxygen by mass, what is the empirical formula of the compound? (Atomic masses: \( S=32 \mathrm{~g} / \mathrm{mol}, 0 \) \( =16 \mathrm{~g} / \mathrm{mol} \) )

\( K ( SO _ { 3 } ) + HCl - SO _ { 2 } KCl + H _ { 2 } O \)

2. If a compound contains \( 40 \% \) sulfur and \( 60 \% \) oxygen by mass, what is the empirical formula of the compound? (Atomic masses: \( \mathrm{S}=32 \mathrm{~g} / \mathrm{mol}, 0 \) \( =16 \mathrm{~g} / \mathrm{mol} \) )

4. How many atoms are found in a 15.3 g sample of bismuth? A. \( 1.26 \times 10^{26} \) atoms B. \( 4.41 \times 10^{22} \) atoms C. \( 6.02 \times 10^{23} \) atoms D. \( 9.21 \times 10^{24} \) atoms

Given 11.9 g Al what is the amount of Al in moles?