Can someone help me to answer this, please, and explain it.

(a) Atoms are very small compared to objects on the macroscopic scale. The radius of a nickel atom is 125pm. What is this value in meters and in centimeters? mcm (b) The mass of a single nickel atom is 9.751023g. Suppose enough Ni atoms were lined up like beads on a string to span a distance of 40.1cm ( 16 inches). How many atoms would be required? atoms What mass in grams of Ni would be used? g Could you weigh out this amount of nickel using a typical laboratory balance? (c) Taking the density of nickel metal to be 8.91g/cm3, calculate the mass of metal needed to form a piece of Ni wire with the same length as the distance in b, but with a diameter of 1.50mm. Hint: The volume of a cylinder is n times its radius squared times its height. (V=nr2h) g How many nickel atoms does this represent? atoms