Windows has a Sound window that allows you to manage your computer's audio settings and devices. If you cannot hear sound when it should be playing, head to the Sound window and tell Windows to select the audio input device you are using. 1. Click the Start button and type mmsys.cpl..
The atomic number of lead is 82. That tells us that electrically neutral lead has 82 protons and 82 electrons. The three stable isotopes of lead are 206 Pb, 207 Pb, and 208â¦ Pb. These isotopes have 124, 125, and 126 neutrons per each atom, respectively.
Which of the following has the greatest mass, in grams? 1 atom of gold (Au) 0.5 mol lead (Pb) atoms 2.0 mole of chlorine (Cl) atoms 25 atoms of mercury (Hg) .5 mol lead. first, eliminate the atoms. none of them can compare to quantities in moles. now you need to find the molecular weight of lead and chlorine. molecular weight of lead is about 207 g/mol, so half a mole of lead is 103.5 g. molecular weight of chlorine is about 35.5 g/mol, so two moles of chlorine is about 71 grams.