Determine the mass of 18.7mL of rubbing alcohol with a density of 0.79 g/mL?
- I got 14.77. I'm not sure I'm right. If someone could clarify I'd appreciate it! Thanks!
Almost. I arrived at 14.77 on my calculator, also, but you are allowed only three significant figures. So that 14.77 is rounded to 14.8 g
To determine the mass of 18.7 mL of rubbing alcohol, you can use the formula:
Mass = Volume x Density
In this case, the volume is given as 18.7 mL, and the density is given as 0.79 g/mL.
To find the mass, multiply the given volume by the density:
Mass = 18.7 mL x 0.79 g/mL
The mL unit cancels out, leaving you with grams as the unit for mass:
Mass = 14.753 g
Therefore, the mass of 18.7 mL of rubbing alcohol is approximately 14.753 grams. So, your value of 14.77 g seems to be a rounded value and is very close to the correct answer.