Question

1 a rectangular block of steel measures 4cm * 2cm* 1.5cm. its mass is 93 .6g

a) calculate the density of steel

b)steel is made up of almost entirely of atoms butt is denser than iron

suggest a reason for this

Answer 1

a) density = 93.6g/12cm³

= 7.8g/cm³

b) The reason is alloying

Explanation:

volume of the rectangular block = l× b × h

= (4 × 2 × 1.5)cm

= 12 cm³

density = mass/ volume

mass = 93.6g

volume = 12cm³

therefore,

density = 93.6g/12cm³

= 7.8g/cm³

b) °Steel is formed when alloying Iron with carbon.

°Alloying improves the physical properties of the metals and non-metals