The half-life of carbon-14 is about 5730 years
Plastic doesn’t connect to metals
A should be the products and D should be the reactants. So D should be the answer.
Molar mass NaCl = 58.5 g/mol
C = 158.0 g/L
Molarity = C / molar mass
M = 158.0 / 58.5
M = 2.7000 M
hope this helps!
Lithium i believe is the answer