Which statement is not true about the field of science? It is based on observations and explanations of the natural world. It is
2 answers:
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Empirical formula of a compound gives the proportions of the elements in that compound but it does not define the actual arrangement and number of atoms.
Let the empirical formula of compound be .
The ratio of number of moles of C, H and O can be calculated as follows:
Simplifying the ratio,
Thus, the value of x, y and z will be 1, 2 and 1 respectively.
Therefore, the empirical formula will be .
Answer:
The concentration of the solution,
Explanation:
The absorbance of a solution can be calculated by Beer-Lambert's law as:
Where,
A is the absorbance of the solution
ɛ is the molar absorption coefficient ()
C is the concentration ()
l is the path length of the cell in which sample is taken (cm)
Given,
A = 0.20
ɛ = 27400
l = 1 cm
Applying in the above formula for the calculation of concentration as:
So , concentration is: