Determine the volume of fluid in the graduated cylinder shown. 8.135 mL 8.15 mL 8.13 mL 8.23 mL

Explanation:

The picture with the graduated cylinder is missing.

See attached the picture with a graduated cylinder showing a volume of fluid between 8 and 9 mL, which is good to explain you how to solve this kind of problems.

First, you must know that the lecture is read where the meniscus is, the curve, of the fluid is. Since the curve is upward, you must read the mark that coincides with the bottom of the meniscus.

Second, determine what the marks mean. Count: there are 9 lines between 8 and 9; that is 10 divisions. If 8 is the mark for 8 mL and 9 is the mark for 9 mL, then each line is [ 9ml - 8ml] / 10divisions  = 1 mL / 10 = 0.1 mL

Thus, the meniscus is between the marks of 8.1mL and 8.2mL.

Third, approximate: you can appreciate that the mark is, approximately, in the midpoint between 8.1mL and 8.2mLm, then the measure is

alkaline metals are lithium, sodium, rubidium, potassium, cesium and francium.

alkali metals have electronegativity from 0.7 to 1, lowest in periodic table of elements, which means that alkali metals (i group in periodic table) has positive oxidation number in compounds.

electronegativity is a chemical property that describes the tendency of an atom to attract a shared pair of electrons towards itself.

alkaline metals (far left in main group) have lowest ionizations energy and easy remove valence electrons,

for example, potassium is the alkali metal and has a single valence electron in the outer electron shell.

electron configuration of potassium is: ₁₉k 1s²2s²2p⁶3s²3p⁶4s¹.

they can not exist alone in nature, because they are very reactive.

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.