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Alex_Xolod [135]
3 years ago
15

Select the statement that is true for why is a blank measured before the sample. Select one: a. A blank is measured to remove th

e signal caused by the cuvette walls and solvent. b. A blank is measured to calibrate the spectrophotometer's light source. c. There is no reason to measure a blank before the sample. d. A blank is measured to clean the spectrophotometer.
Physics
1 answer:
kykrilka [37]3 years ago
4 0

Answer:

Option A

A blank is measured to remove the signal caused by the cuvette walls and solvent

Explanation:

Spectrophotometer is an instrument for measuring the absorbance or transmittance of the liquid in terms of wave function. The blank solutions is used for calibration of spectrophotometer while the cuvette is the container where the liquid sample is taken in the spectrophotometer. The absorbance of blank solution is known as zero hence the name blank solution. Normally, a blank is is measured to eliminate signal caused by cuvette walls on solvent and results into the formation of solute peaks in the spectra.

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2 years ago
The total charge a battery can supply is rated in mA⋅hmA⋅h, the product of the current (in mA) and the time (in h) that the batt
Nat2105 [25]

Answer:

118800 seconds

Explanation:

Given :

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Current $I=\frac{V}{R}$

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Time taken, $t=\frac{1800 \times 10^{-3}}{0.0545}$

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8 0
3 years ago
Maggie is using her cat in an experiment on animal intelligence. Which of the following statements is true?
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1. If Maggie gives her cat an unfair advantage, her experimental results will be biased.

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Maggie using her cat in the experiment to test for intelligence gives the cat an unfair advantage, her experimental results will be biased.

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  • Such an experiment should be carried out with an unknown cat.

learn more:

Experiment brainly.com/question/1621519

#learnwithBrainly

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While looking at bacteria under a microscope you decide to take a break when u return the amount of bacteria has doubled in size
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~ Sincerely,
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