How many molecules of oxygen gas (02) are in 8.00 grams of
oxygen?

1.51×10²³

Explanation:

Convert to moles first

moles=mass/molar mass

moles=8.00/32      (molar mass of oxygen is multiplied by 2 since it is diatomic)

moles=1/4

multiply moles with Avogadro's constant

1/4*6.02×10²³

1.505×10²³

1.51×10²³ molecules of O₂ are in 8.00 grams of Oxygen.

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.

a pan containing water is placed in a positio n where it is exposed to a 10 mile per hour wind. the pan contains a uniform depth of 1.27 cm of water, is quite wide, and has a length of 2.44 m in the wind direction. the water in the pan is at a constant temperature of 15.5 °c.