Which element(s) is/are not balanced in this equation?

pb(no3) + 2 kci ⇒ pbci2 + kno3

a. n and o
b. pb, n, o
c. k, n, and o
d. k

Explain which group an element with the electron configuration 1s2 2s2 2p6 3s2 3p6 3d1 4s2 belongs to.

Sulfuric acid (a component of acid rain) reacts with limestone (calcium carbonate) to produce calcium sulfate and carbon dioxide. this damages buildings and statues made of limestone. which solution of sulfuric acid will damage these structures more quickly? a. 0.001% b. 0.005% c. 0.010% d. 0.015%

What is the correct term for living the most sustainable life you can within your current circumstances?