Question

A laboratory utilizes a mixture of 10% dimethyl sulfoxide (DMSO) in the freezing and long-term storage of embryonic stem cells. If DMSO has a specific gravity of 1.1004, calculate the specific gravity, to four decimal places, of the mixture (assume water to be the 90% portion).

Answer 1

The correct answer is "1.0100".

Step-by-step explanation:

Let the volume of mixture be 100 ml.

then,

The volume of DMSO will be 10 mL as well as that of water will be 90 mL.

DMSO will be:

=
`10* 1.1004`

=
`11.004 \ g`

The total mass of mixture will be:

=
`90+11.004`

=
`101.004 \ g`

Density of mixture will be:

=
`(Mass)/(Volume)`

=
`(101.004)/(100)`

=
`1.01004 \ g/mL`

hence,

Specific gravity of mixture will be:

=
`(Density \ of \ mixture)/(Density \ of \ water)`

=
`(1.01004)/(1)`

=
`1.0100`