The zinc in a 1.139g sample of a foot powder was precipitated as ZnNH4PO4. Strong heating of the precipitate yielded 0.4089g Zn2P2O7. Calculate the mass percent of zinc in the sample of foot powder.

answer; /// the amount of material dissolved in a measure of liquid(concentration) the above statement is (true); /// good luck

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.