A2.550 x 10^−2 m solution of glycerol (c3h8o3) in water is at 20.0°c. the sample was created by dissolving a sample of c3h8o3 in water and then bringing the volume up to 1.000 l. it was determined that the volume of water needed to do this was 998.9 ml . the density of water at 20.0°c is 0.9982 g/ml.
a. calculate the molality of the glycerol solution.

Explanation:

Given , molarity of glycerol=

Volume= 1 L.

Therefore, No of moles of glycerol=

Now, volume of water needed, V=998.8 mL.

Density is given as= 0.9982 g/mL.

Therefore, mass of water =

Now, molality=

Hence, this is the required solution.

out of these options:

ability to burn paper

pure sodium reacting violently with water

the boiling point of water

helium does not tend to react with anything

i would say this is a physical property:

helium does not tend to react with anything

why? :

i said helium does not tend to react with anything because well, it reacts to ! but ability to burn paper, pure sodium reacting violently with water, & the boiling point of water are chemical or

physical properties: the properties of a substance that can be observed without changing the chemical makeup of the substance

chemical properties: properties of a substance relating to the chemical nature and reactivity of the substance

answer: i have one answer

acids are substances that ionize (break off) in an aqueous solution to produce hydrogen (h+) ions

explanation:

hope this and sorry i could only come up with one answer!