_______ are very simple plants that do not have true roots, stems, or leaves and can grow to only a few centimeters tall.

1 answer:

4 0

The answer is D. Nonvascular plants. These plants are usually very short and can't grow to be very tall. A good example is moss.

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During a spectrophotometric analysis of an unknown, you measure your solution's absorbance, and the value is higher than the hig

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Answer:

A) Dilute the unknown so that it will have an absorbance within the standard curve. Once the diluted unknown concentration is determined, the full strength concentration can be calculated if the dilution process is recorded. Beer's law only applies to dilute solutions, so diluting the unknown is better than making new standards.

Explanation:

Beer's law states that absorbance is proportional to the concentrations of the absorbing species. This is verified in the case of diluted solutions (0≤0.01 M) of most substances. As a solution gets more concentrated, solute molecules interact between themselves because of their proximity. When a molecule interacts with another, the change in their electric properties (including absorbance) is probable. That's why the plot of absorbance versus concentration stops being a straight line, and Beer's law is no longer valid.

Therefore, if the absorbance value is higher than the highest standard, dilutions should be made. Once this concentration is determined, the full strength concentration can be calculated with the inverse of the dilution.

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A diesel truck produces 47.5kJ of useful output energy from 125kJ of diesel fuel.what is the truck efficiency?.show the solution

Alex Ar [27]

You have to do a report :
$\frac{E_f}{E_i} = \frac{47,5}{125} = 0,38$

So the truck efficiency is 38%.

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3 years ago

How do you describe the milk?

Lady bird [3.3K]

Answer:

emulsion

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An emulsion is a mixture of two or more liquids that are normally immiscible. Emulsions are part of a more general class of two-phase systems of matter called colloids.

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2H2 (g) + O2 (g) -->2H2 O(g)
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7.25/2=3.625

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