16. What is a pure substance formed when two or more different elementscombine called?A. compoundB. moleculeC. element
1 answer:
<h2>Answer:</h2>
Compound. Option A is correct
<h2>Explanations:</h2>
When two or more different elements combines, a compound is formed. For instance, if carbon and oxygen combines, carbondioxide is formed according to the equation;
From the reaction, carbon and oxygen are the elements while carbondioxide is the compound. Hence we can conclude that a pure substance formed when two or more different elements combine called compound.
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The amount of the solute present in the given solution is called the concentration. The best way to represent the concentration of the solution is
Molar concentration is the molarity of the solution that is the measure of the concentration of the solute dissolved in the solution.
The formula for calculating molar concentration is given as,
The concentration of any substance is represented in the square bracket like or
Therefore, option B. is the representation of the concentration.
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