A spectrophotometer measures the concentration of a sample dissolved in water by shining a light through it and recording the amount of light that emerges. In other words, if we know the amount of light absorbed, we can calculate the concentration of the sample. For a certain substance, the concentration (in moles per liter) is found using the formula
C = −3000 ln(x/y)
where y is the intensity of the incident light and x is the intensity of light that emerges. Find the concentration of the substance if the intensity x is 30% of y.

Question

A spectrophotometer measures the concentration of a sample dissolved in water by shining a light through it and recording the amount of light that emerges. In other words, if we know the amount of light absorbed, we can calculate the concentration of the sample. For a certain substance, the concentration (in moles per liter) is found using the formula
C = −3000 ln(x/y)
where y is the intensity of the incident light and x is the intensity of light that emerges. Find the concentration of the substance if the intensity x is 30% of y.

anonymous · Answer

please help?