A solid weighs 1000g in air , 75g in water, and 70g in oil. Calculates the relative density of oil ?
mass of water displaced = 1000 - 75 = 925 g so if the water density is 1 g/ cm^3 its volume is 925 cm^3
the mass of oil displaced is rho*925 g
so
rho*925 = 1000 - 70
= 930 g
so
rho = 1.0054 g/cm^3
Strange oil. Most oil floats on water.
To calculate the relative density of oil, we need to use the following formula:
Relative density = Density of the Substance / Density of the Reference Substance
In this case, the reference substance is water. We have the weight of the solid in air, water, and oil.
First, we need to determine the volume of the solid in each case using the formula:
Volume = Mass / Density
Given:
Weight in air = 1000g
Weight in water = 75g
Weight in oil = 70g
1. Calculate the volume of the solid in air:
Volume in air = 1000g / Density of air
Since the density of air is very low compared to the density of solids, it can usually be neglected in calculations. So, for practical purposes, you can assume that the volume in air is the same as the volume in water.
2. Calculate the volume of the solid in water:
Volume in water = 75g / Density of water
The density of water is approximately 1g/cm³. Therefore,
Volume in water = 75g / 1g/cm³ = 75 cm³
3. Calculate the volume of the solid in oil:
Volume in oil = 70g / Density of oil
Now, we can substitute the values we have so far into the relative density formula:
Relative density of oil = (Volume in oil) / (Volume in water)
Relative density of oil = (70g / Density of oil) / 75 cm³
To get the relative density of oil, you need to determine the density of the oil used in the experiment. If you have that information, you can divide 70g by the density of the oil and then divide the result by 75 cm³.