Question

You need 4.0 ounces of a steroid ointment. if there are 16 oz in 1 lb, how many grams of ointment does the pharmacist need to prepare

Answer 1

The given units are the units of masses which are interconvertable.

It is given that:

`1 lb = 16 oz`

Now, converting
`kg to lb`:

Since,
`1 kg = 2.20462 lb`

So,
`(0.0625 lb)/(1 oz)* (1 kg)/(2.20462 lb)`

Now converting
`kg to g`:

Since, 1 kg = 1000 g

So,
`(0.0625 lb)/(1 oz)* (1 kg)/(2.20462 lb)* (1000 g)/(1 kg) = 28.349 (g)/(oz)`

For
`4 oz`:

`28.349(g)/(oz) * 4 oz = 113.396 g`

Thus,
`113.396 g` of ointment needed to be prepared by the pharmacist.