Solve the problem. express your answer to the correct number of significant figures. 6.221 × 7.11 − 13.7 =

6.221 × 7.11 − 13.7

first we determine the product of 6.221 and 7.11 and round the value to minimum number of significant figures which is "3"   since  7.11 has "3" significant figures and 6.221 has "4" significant figures

so Product = 6.221 × 7.11 = 44.2

now we do the subtraction , and round the answer to minimum decimal number

44.2 - 13.7

30.5  

explanation: no but i do not usually comment

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.