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Which best...
Chemistry, 24.03.2021 16:20 alexandria3498
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Which best describes how surface water enters and is stored in an aquifer?
O A. Surface water enters the aquifer through the soil by infiltration and is stored in large underground pools.
OB. Surface water enters the aquifer through the soil by infiltration and is stored in porous underground rock layers.
C. Surface water enters the aquifer through large cracks and fissures in the soil and is stored in large underground pools.
O D. Surface water enters the aquifer through large cracks and fissures in the soil and is stored in porous underground rock layers.
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Zinc + lead(ii) nitrate yield zinc nitrate + leadwhat's the chemical equation for this?
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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.
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8.98 dm3 of hydrogen gas is collected at 38.8 °c. find the volume the gas will occupy at -39.9 °c if the pressure remains constant.
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What if it is did darwin used to support his theory of evolution
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