To find the volume of ethanol required to obtain 19.8 g, we can use the formula that relates density, mass, and volume:
Density = Mass / Volume
We can rearrange this formula to solve for volume:
Volume = Mass / Density
Now, substituting the values:
- Mass = 19.8 g
- Density = 0.789 g/cm³
Now plug these values into the formula:
Volume = 19.8 g / 0.789 g/cm³
When performing the calculation:
Volume = 25.1 cm³
This means that you need to pour approximately 25.1 cm³ of ethanol into the graduated cylinder to obtain 19.8 g of alcohol. This calculation helps in understanding how mass and density are interconnected, especially in the context of measuring liquids in scientific experiments.