Answer:
<h2><u><em>
internal energy</em></u></h2>
Explanation:
At constant pressure, the heat of reaction is equal to the enthalpy change of the system. Most chemical reactions occur at constant pressure, so enthalpy is more often used to measure heats of reaction than internal energy
Answer:
Salt.
Explanation:
Salt=NaCl
Ionic bonds are made when the two elements are from different sides of the periodic table. On the left, we have our metals. On the right, we have our nonmetals. Sodium is a metal and Chlorine is a gas. Water, sugar, and carbon dioxide are covalent bonds because all the elements are from the right side of the periodic table. Hydrogen is a nonmetal too.
Answer:
vaporize the liquid water
Explanation:
Since you don't have to heat ice that much to become liquid water, and you
need it to be like 252 Fahrenheit to vaporize (or evaporate) water, you need the atoms to move a lot more to evaporate water than to melt ice.
Answer:
Option A) Na
Explanation:
From the options given above, sodium (Na) is most likely to lose electron to form ion
Na is a group 1 metal. Metals form ions by losing electron(s).
From the options given above, only Na is a metal and so it is most likely to form ion by losing electron
The safest conclusion would be that the marine organisms dominated the living world at that time. It is really hard to say with certainty that there were no land organisms just from the lack of their fossils in that era. The process of forming the fossils is quite fragile and requires various conditions to be fulfilled ( perfect temperature, moisture, the composition of the ground etc.), so a lack of fossils can also be due the bad conditions for fossilization at that time, not the lack of organisms present.