10 gram sample of methane (CH 4 ) has the same number of molecules as 10 gram sample of O 2

The given question is incomplete. The complete question is:

10 gram sample of methane has the same number of molecules as 10 gram sample of . True or False

Thus the statement is False.

Explanation:

According to avogadro's law, 1 mole of every substance contains avogadro's number of particles.

To calculate the moles, we use the equation:

1.  

Now 1 mole of molecule contains = of molecules

0.625 mole of molecule contains = molecules

2.  

Now 1 mole of molecule contains = of molecules

0.3125 mole of molecule contains = molecules

The number of molecules are different.

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.