More white precipitate forms when 20 drops of 6 M NH4OH is added to the same test tube that contained the 6 M HCl. You may wonder if the precipitate formed in this step is really calcium oxalate since solid calcium hydroxide could also form. To investigate this possibility, 20 drops of 6 M NH4OH is added to the 3rd test tube containing only calcium chloride. What were your observations and what did they indicate about the identity of white precipitate?

answer: a tank of height h is filled with water and sits on the ground. water squirts from a hole at a height y above the ground and has a range r. for two y values, 0 and h, r is zero. determine the value of y for which the range will be a maximum.

explanation:

am i too late?

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.