The conversion factor between mass and moles for a compound is the molar mass. true false

true

Explanation:

Moles -

Moles is denoted by given mass divided by the molar mass ,

Hence ,

n = w / m

n = moles ,

w = given mass ,

m = molar mass .

From the above equation , if two of the quantity is known then the third quantity can easily be determined , by using the above formula ,

i.e. ,

n = w / m

In case , mole ( n ) and mass ( w ) , is known , the value of the molar mass can be determined easily .

Hence ,

The given statement of the question is true.

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.