Question

Rubbing alcohol or isopropanol can be described by the chemical formula C3H7OH. One milliliter of isopropanol has a mass of 0.76 g, so its density is 0.76 g/mL. Isopropanol is often used as a cleaner or a disinfectant and evaporates when placed on warm objects. However, caution must be taken when using isopropanol, because it is also highly flammable.

Which of the following is a chemical property of isopropanol?
A.
Isopropanol evaporates when placed on a warm object.
B.
One mL of isopropanol has a mass of 0.76 g.
C.
Isopropanol is flammable.
D.
Isopropanol has a density of 0.76 g/mL.

Answer 1

hold on i got you

Answer 2

ok

Answer 3

Given:
mass of isopropanol = 78.6 g
molar mass = 60.1 g/mol

mol isopropanol = mass / molar mass
mol isopropanol = 78.6 g / 60.1 g/mol
mol isopropanol = 1.3078 mol

There is 1.3078 mol isopropanol in the sample.

Answer 4

ok thx

Answer 5

Asked & answered here:

https://questioncove.com/study#/updates/5fb285e912608a217fe45e00

The question is not asking about the number of moles of isopropanol; it's asking for its chemical properties.