A substance made of two or more elements that have been chemically combined is a(n) ______.
2 answers:
Answer: Compound
Explanation:
Element is a pure substance which is composed of atoms of similar elements. Example:
Compound is a pure substance which is made from atoms of different elements combined together in a fixed ratio by mass. Example:
Mixtures are heterogeneous materials as they do not have uniform composition and the components are not evenly distributed throughout the material. Example: Sugar solution
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This problem is providing the initial volume and pressure of nitrogen in a piston-cylinder system and asks for the final pressure it will have when the volume increases. At the end, the answer turns out to be 2.90 atm.
<h3>Boyle's law</h3>In chemistry, gas laws are used so as to understand the volume-pressure-temperature-moles behavior in ideal gases and relate different pairs of variables.
In this case, we focus on the Boyle's law as an inversely proportional relationship between both pressure and volume at constant both temperature and moles:
Thus, we solve for the final pressure by dividing both sides by V2:
Hence, we plug in both the initial pressure and volume and final volume in order to calculate the final pressure:
Learn more about ideal gases: brainly.com/question/8711877