Answer:
A. The sum of the voltages of the half-reactions is positive.
Explanation:
correct on a p e x
Answer:
It is the minimum amount of analyte that produces a signal which can be measured with reasonable accuracy - LOQ
The concentration is equal to three times the standard deviation of the signal from the blank divided by the slope of the calibration curve - LOD
The concentration is equal to 10 times the standard deviation of the signal from the blank divided by the slope of the calibration curve - LOQ
It is the minimum amount of analyte that produces a signal that is significantly different from the blank - LOD
Explanation:
We define the limit of detection has the lowest amount of analyte that produces a signal that is significantly different from a blank solution ( the absence of the substance). It is calculated as three times the standard deviation of the signal from the blank divided by the slope of the calibration curve.
The limit of quantitation (LOQ) is defined as the minimum amount of analyte that produces a signal which can be measured with reasonable accuracy. It is measured as 10 times the standard deviation of the signal from the blank divided by the slope of the calibration curve.
Answer: 1.0 mol/dm3
Explanation:
Given that:
Amount of moles = 0.25 moles
Volume = 250 millliters of solution
Convert milliliters to liters
If 1000 milliliters = 1 liter
250 milliliters = (250/1000) = 0.25 L
Recall that 1 liter = 1dm3
so, 0.25 liters = 0.25 dm3
Now, molarity is calculated by dividing the amount of a substance by the volume of the solution.
i.e Molarity = (Amount in moles/volume in dm3)
Molarity = (0.25 moles / 0.25 dm3)
= 1.0 mol/dm3
Thus, the molarity of the solution is 1.0 mol/dm3
Answer:
Propenyl-benzene
Explanation:
Hello,
Elimination reaction of solid (1-chloropropyl)-benzene due to the heat in presence of ethanol turns out based on the attached picture in which both the chlorine a the hydrogen in the second carbon go out and subsequently get together to form propenyl-benzene and hydrochloric acid.
Best regards.
Helium is a gas composed of itself, were air is composed of Oxygen and Nitrogen making the air more dense than the helium making it float to find other gases
Two factors to change are Air pressure (due to the balloon moving ) and the helium making the balloon rise.
That's about all I can explain...hope this helps >.<
