question_answer 54)

  The mass of one steel screw is 4.11 g. Find the mass of one mole of these steel screws. Compare this value with the mass of the earth (5.98 x 1024 kg). Which one of the two is heavier and by how many times?

Answer:

  Given that, mass of one steel screw = 4.11 g Mass of earth We know that,             1 mole = 6.022x 1023 atoms/molecules/ions Mass of 1 mole of screws = 6.022x 1023 x 4.11 g = 2.48x 1024 g Mass of 1 mole screw 2.48x 1024 g Ratio of 1 mole of screw and mass of earth = 1:2410 Earth is heavier than screw by 2410 times.