Answer:
The synthesis of aspirin is known in organic chemistry as an esterification reaction. This is a substitution reaction in which an alcohol (the –OH group in salicylic acid) reacts with acetic anhydride to form an ester, aspirin.
Explanation:
A: Atoms and molecules is the correct answer.
The partial pressure of nitrogen in the problem is 725 - 231 = 494 mmHg.
494 / 760 = 0.650 atm. To continue, we will use the ideal gas equation to find the mole of N2 and from that, we can find the mass of N2.
PV = nRT ----> n= PV/RT
Find the mole of Nitrogen
Given P=0.650 atm
n= (0.650)x(255/1000) / (0.082 x 338)
= (0.650) (0.255) / 27.716
= 0.16575 / 27.716
= 0.0060 moles
Find the mass of nitrogen
G= n x Mr (N2)
= 0.0060 x 28
= 0.168 grams
So the mass of nitrogen is 0.168
The molecular basis of the property of water responsible for the presence of ice on the surface of a frozen lake is Solid-phase water—ice—has an extraordinary property
Water has extremely strong hydrogen bonds with itself, which accounts for its high boiling and freezing points. However, in the liquid state, the arrangement of the molecules and hydrogen bonds is arbitrary. Because of the two oxygen lone pairs and the water's 104.5-degree H-O-H bond angle, the more structured array that forms when the molecules freeze places them farther apart than the random liquid. The resulting solid has a lower density because the molecules are more spaced apart than in a liquid.
Ice, a solid form of water, has the remarkable feature of being less dense than liquid water. Almost exclusively only water has a solid phase that floats on a liquid. Lakes and rivers are protected from the subzero winter air by frozen, floating water, which keeps them liquid and able to support life.
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Theres three elements i'm assuming. C (carbon), H (hydrogen), O is Oxygen.
