A graduated cylinder massed at 34.56g and then 8.6 ml was added of an unkonwn liquid this brought the mass to 45.87g. What is the density?
I'm not sure how to go about this. Is the 34.56g unneccessary information?
Or, do you subtract 45.87-34.56= 11.31 then do mass 11.31/volume8.6 = 1.315 which in sig fig is 1.3g/ml
Mass empty cylinder = 34.56g
mass cylinder + liquid = 45.87g
The difference is the mass of the 8.6 mL of the liquid that was added.
Density = mass/volume
so did I do it right?
You did it exactly right. Bravo! I didn't scroll down far enough to see the bottom of the post where you had worked it out.
Oh thank you!
To find the density of the unknown liquid, we can use the formula:
Density = Mass / Volume
In this case, the initial mass of the graduated cylinder (34.56g) is indeed unnecessary information for finding the density of the unknown liquid. We only need to consider the change in mass and volume due to the addition of the liquid.
Step 1: Calculate the change in mass:
Mass of the liquid = Final mass - Initial mass
Mass of the liquid = 45.87g - 34.56g
Mass of the liquid = 11.31g
Step 2: Calculate the density:
Density = Mass of the liquid / Volume of the liquid
Density = 11.31g / 8.6ml
Density ≈ 1.315g/ml
Given that the answer needs to be rounded to two significant figures, the density is approximately 1.3 g/ml.