Question

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

Answer 1

One mole of screws weigh = 2.475 ×10²⁴g            = 2.475×10²¹ kg 

Mass of the Earth / Mass of 1 mole of screws = 5.98 ×10²⁴ kg / 2.475× 10²¹ kg

                                                                        = 2.4 ×10    

Mass of earth is 2.4×10³ times the mass of screws 

The earth is 2400 times heavier than one mole of screws