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Bumek [7]
3 years ago
8

Which is a renewable resource?A.gold B.copper C.timber D.natural gas

Chemistry
1 answer:
romanna [79]3 years ago
7 0

Answer: D. Natural Gas

Explanation:

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What was the purpose of putting distilled water in the blank cuvette? if your unknown used ethanol as the base solvent, what wou
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The purpose of using distilled water in the cuvette of the spectrophotometer is to calibrate the instrument. It is generally considered that distilled water shows zero absorbance and 100 % transmittance. So, to zero out the absorbance of compounds other than the analyte being determined, distilled water is used as a blank.

If the unknown being determined is prepared using ethanol as the base solution, the blank used must be ethanol. This is because absorbance if any from the solvent, ethanol must be zeroed out as when the measurement of the actual unknown is being made, the absorbance of the solvent does not interfere.

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Desertification.......
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3 years ago
How many moles of HCl are required to completely neutralize 0.30 moles of Ca(OH)2?
hammer [34]
Each mole of Ca(OH)₂ will produce 2 moles of OH- ions

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