What do the data suggest might be the likely cause of Grandpa Carl's hearing problems

Which statement is true about this reaction? 14n+1h 15o it is a practical source of energy on earth. it occurs only outside the solar system. its product is heavier than each of its reactants. it shows the critical mass of an element.

20 pts ‼️ an unmanned spacecraft travels to mars. mars has a lower strength of gravity than earth. where in the image is the spacecraft’s weight the greatest?

The empirical formula of a compound is ch2o and its mass is 120 amu/molecule, what is its formula?