Which of the following objects has the strongest gravity?

If the atomic mass of an atom is 34 and the atom contains 13 protons, how many neutrons does the atom contain?

In a spacecraft, the following reaction occurs: co2(g) + 2lioh(s) -> lico3(s) + h2o(i) (i attached picture of equation) how many liters of carbon dioxide will 4 moles of lithium hydroxide (lioh) absorb? (one mole of any gads occupies 22.4 l under certain conditions of temperature and pressure. assume those conditions for this equation.) 45l 6.0l 3.0l 34l

What happened in 2012 and how does it illustrate the importance of understanding the sun and how it works?