Find mass of 2.5 moles of h20

45g

Explanation:

Molar Mass of H2O = (2x1) +16 = 2 + 16 = 18g/mol

Number of mole of H2O = 2.5moles

Mass of H2O =?

Mass = number of mole x molar Mass

Mass of H20 = 2.5 x 18 = 45g

mention the spill to the teacher clean the area and throw the broken pieces away

explanation:

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.