At the beginning of an experiment, a scientist has 308 grams of radioactive goo. After 210 minutes, her sample has decayed to 4.8125 grams. What is the half-life of the goo in minutes?

Find a formula for G(t), the amount of goo remaining at time t.

How many grams of goo will remain after 71 minutes?

14,16 18 reacts with group

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.