Question

If 15 drops of ethanol from a medical dropper weight 0.60g, how many drops does it takes from a dropper to dispense 1.0ml of ethanol? The density of ethanol is 0.80g/ml

Answer 1

Answer : The number of drops it takes from a dropper to dispense 1.0 ml of ethanol is, 20 drops

Solution : Given,

Density of ethanol = 0.80 g/ml

Mass of ethanol = 0.60 g

First we have to calculate the volume of ethanol.

Formula used :
`Density=(Mass)/(Volume)`

`0.80g/ml=(0.60g)/(Volume)`

`Volume=(0.60g)/(0.80g/ml)=0.75ml`

The volume of ethanol is, 0.75 ml

Now we have to calculate the number of drops it takes from a dropper to dispense 1 ml of ethanol.

As, the number of drops in 0.75 ml of ethanol = 15

So, the number of drops in 1.0 ml of ethanol =
`(15)/(0.75)* 1.0=20`

Therefore, the number of drops it takes from a dropper to dispense 1.0 ml of ethanol is, 20 drops