Answer:
Explanation:
1 mol of nitrogen at STP = 22.4 L = 22400 cc
n = Mol of 
= 
M = Molar mass of = 
= Avogadro's number = 
Mass of is
Mass of the nitrogen is
Number of molecules is given by
The number of molecules present in it are
Umm yo no se no ablo engles
Answer:
cutting, bending, dissolving, freezing, and boiling
Explanation:
A physical change is a change in one or more physical properties of matter without any change in chemical properties. In other words, matter doesn't change into a different substance in a physical change. Examples of physical change include but are not limited to, from solid to liquid or from liquid to gas are also physical changes.
Hydrogen bonding is important because it is crucial to all life on Earth. Here are three reasons why hydrogen bonding is important. DNA has a double-helix structure because hydrogen bonds hold together the base pairs in the middle. Without hydrogen bonds, DNA would have to exist as a different structure.
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