Yeah man I can help explain a little bit fits
C, 0.746 mol Ag.
1 mol Ag = 6.022 x 1023 atoms of Ag -> 4.49 x 1023 atoms of Ag x 1mol Ag/6.022 x 1023 atoms -> 0.746 mol Ag
Lower the pH because increased number of free hydrogen ions
<span>20 bicarbonate ions to 1 carbonic acid molecule
20:1</span>