The sign that would make me call 911 is his pulse. If the child's pulse is unresponsive, then that would be a clear sign for me to call the paramedics.
Molecular weight of AgBr = 187.7 moles of Ag = moles of Br = moles of Ag = 2.96 x 10⁻³ mol concentration of HBr (Molarity) = conc. of Br (strong acid) =
