<p>A cylinder made up of an allow containing Fe, Co and Mo equal to 71%, 12% and 17% respectively. The density of alloy is 8.20 g/ml. How many Co atoms are there in a cylinder of radius 2.50 cm and a length of 10.0 cm. Atomic mass of Co = 60 g&nbsp;<math xmlns="http://www.w3.org/1998/Math/MathML"><mi>m</mi><mi>o</mi><msup><mi>l</mi><mrow><mo>-</mo><mn>1</mn></mrow></msup></math>.</p>