Help me! Who ever gets to answer and has the best answer gets brainliest (very easy!)

How manyatoms of mercury are in 1.4214e+1 ml sample

Needthe meter is the standard unit for: 1) height 2) length 3) weight 4) mass

Which of the following ocean acidification? are the most likely side effects of a ph less than 7.0 in the ocean b. more metal salts altering the ocean chemistry c. dissolution of the shells of marine organisms d. both a & b e. all of the above.