An unknown substance has a density of 2.5g/ml. Is this a physical or chemical property? How do you know?
1 point
Density is a chemical property because every substance has a unique density that we
can use to identify it.
Density is a physical property because we can find it for a substance without
changing the identity of the substance.
O Density is a chemical property because all chemicals have a density.
O Density is a physical property because we can measure it.

away from the curb

explanation:

the wheels would then hit the curb if it started to rolling, decreasing the chance of an accident.

i'm pretty sure its b i might be wrong though!

the best answer is d because the strong cohesion is caused by the ability of water molecules to undergo hydrogen bonding.

a is incorrect because when water solidifies, it becomes   ice, which expands and occupies a bigger volume for the same mass of water in its liquid state.

b is incorrect because water has high surface tension. besides bonding to itself it hydrogen bonds to other molecules at the top decreasing possibility for breaking of attractive forces.

c is incorrect because the water molecule has oxygen which is highly electronegative and so pulls the electron pair towards itself creating a dipole moment, making the molecule polar.

e is incorrect because water has strong adhesion, ability to stick to other molecules such as glass because of this molecules having stronger hydrogen bonding than water.