Question

An unknown liquid was found to have density of 69.22 lb/f. The density of ethylene glycol (the liquid used in

antifreeze) is 1.1088 g/mL. Is the unknown liquid ethylene glycol?

Answer 1

Yes, the unknown substance is the liquid ethylene glycol.

Step-by-step explanation:

Here the density of the unknown substance is 69.22lb/f and the density of ethylene glycol, the liquid used in antifreeze is 1.1088g/ml

We know, 1g = 0.0022lb

1ml=
`3.531 * 10^(-5) ft^3`

Therefore, 1g/ml = 62.428
`lb/ft^3`

Since, the density of ethylene glycol = 1.1088g/ml

= 1.1088
`*` 62.428
`lb/ft^3`

= 69.22
`lb/ft^3`

When the density of ethylene gas is converted from g/ml unit to
`lb/ft^3` unit, it is found to have the same value (69.22)Therefore, the unknown substance here is liquid ethylene glycol.