Which of these structures is least in danger of chemical weathering? a bridge made of iron rods

a pile of tiles made of feldspar

a bench made of composite plastic

a statue made of marble

He table below gives the atomic mass and relative abundance values for the three isotopes of element m. relative abundance (%) atomic mass (amu) 78.99 23.9850 10.00 24.9858 11.01 25.9826 what is the average atomic mass (in amu) of element m? 2.86 5.36 24.30 24.98