Magnesium has three isotopes: Magnesium-24 with a mass of 23.98504 amu and an abundance of 78.70%, magnesium-25 with a mass of 24.98584 amu and an abundance of 10.13%, and magnesium-26 with a mass of 25.98259 amu and an abundance of 11.17%. Without doing the calculations, should the atomic mass of magnesium be closer to 25, 26, or 27 amu? Explain how you know.

the formula would be mgso4

mgso[subscript]4

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.