A-potassium B-lead C-iron D-magnesium E-zinc

Question

asked Feb 1, 2022 46.6k views

1 Answer

Sudheej · Answer 1 · 2022-02-06T02:08:02+0000

The unknown substance : Lead

Given

Density of element

mass of unknown substance = 40 g

volume = 3.5 cm³

Required

The density of unknown substance

Solution

Density is the ratio of mass per unit volume

The unit of density can be expressed in g/cm³ or kg/m³

Density formula:

$\large {\boxed {\bold {\rho ~ = ~ \frac {m} {V}}}}$

Input the value to find the density of an unknown substance :

ρ = 40 g : 3.5 cm³

ρ = 11.43 g/cm³

If we look at the table, the substance which has a density of 11.43 is Lead