Which of the following correctly describes a compound?
2 answers:
Answer: Option (C) is the correct answer.
Explanation:
A compound is a substance that contains atoms of two or more different elements which are chemically combined together in a fixed ratio by mass.
For example, NaCl, ,
etc are all compounds.
Atoms of a compound can be separated by chemical means.
Hence, we an conclude that the atoms can only combine in fixed ratios, and they can only be separated by a chemical change, correctly describes a compound.
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Answer: The original volume in liters was 0.0707L
Explanation:
Combined gas law is the combination of Boyle's law, Charles's law and Gay-Lussac's law.
The combined gas equation is,
where,
= initial pressure of gas = 0.85 atm
= final pressure of gas = 456 mm Hg = 0.60 atm (760mmHg=1atm)
= initial volume of gas = ?
= final volume of gas = 94.0 ml
= initial temperature of gas =
= final temperature of gas =
Now put all the given values in the above equation, we get:
(1L=1000ml)
Thus the original volume in liters was 0.0707L