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The chart shows the bid provided by four contractors to complete a job. which contractor is the most cost-effective?
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Ais a mountain created from eruptions of lava, ash, rocks, and hot gases.
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The content of manganese (mn) in steel was determined spectrophotometrically and with the use of the standard addition method. an unknown sample of mn from a digested steel sample gave an absorbance of 0.185 when analyzed spectrophotometrically. when 5.00 ml of solution containing 95.5 ppm mn was added to 50.0 ml of the unknown steel solution (digested sample), the absorbance was 0.248. calculate the concentration, in parts-per-million (ppm), of mn in the digested steel sample solution.
Answers: 3
Why didn’t sprays see the mold growing on the soup before the fifth day ? why can she see it now ?...
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