In order to plate a steel part having a surface area of 200 inch square with a 0.005 in.-thick layer of nickel: how many atoms of nickel are required

The surface area is given and thickness is 0.005 inch thus, volume will be:

Converting to

The density of Nickel is thus, mass will be:

Now, molar mass of nickel is 58.7 g/mol thus, number of moles can be calculated as follows:

in 1 mole there are thus, number of atoms in 2.48 mol will be:

Therefore, number of atoms of nickel required is

so here we go

atomic mass

239 + 1 = y + 134 + 3 combine like terms

240 = y + 137             subtract 137 from both terms

240 - 137 = y

103 = y

atomic number

94 = z +54 + 0

94 = z + 54               subtract 54 from both sides.

40 = z

answer

water at room temperature is flowing through a pipe with pressure taps located 10 ft apart along one section of the pipe, which are connected to a mercury (s=13.6) manometer.