Why are the bacterial endospores placed on the paper strip and not directly in the fermentation broth?

1 answer:

6 0

The bacterial endospores are microorganisms formed due to nutrient deprivation. These are placed first on a paper strip and not directly in the fermentation broth because these microorganisms are very resistance, thus, they need to adjust to the environment first before being acclimated to it.

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In this experiment, you were asked to calculate your percent yield of alum assuming that you started with pure aluminum. Actuall

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Answer:

Percent yield of alum is 38.6%

Explanation:

Find attached calculations for detailed explanation.

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Atoms of elements at the top of a group on the periodic table are smaller than the atoms of elements at the bottom of the group.

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In the flame test, barium ions produce a green flame whereas calcium ions produce a red flame. In your own words, explain these

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Answer:

The Barium flame is green because it is a difficult flame to excite, therefore for it to trigger a flame it is necessary that it be too excited for it to occur.

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Explanation:

The flame test is a widely used qualitative analysis method to identify the presence of a certain chemical element in a sample. To carry it out you must have a gas burner. Usually a Bunsen burner, since the temperature of the flame is high enough to carry out the experience (a wick burner with an alcohol tank is not useful). The flame temperature of the Bunsen burner must first be adjusted until it is no longer yellowish and has a bluish hue to the body of the flame and a colorless envelope. Then the tip of a clean platinum or nichrome rod (an alloy of nickel and chromium), or failing that of glass, is impregnated with a small amount of the substance to be analyzed and, subsequently, the rod is introduced into the flame, trying to locate the tip in the least colored part of the flame.

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At a macroscopic level, it is observed that the sample, when heated in the flame, will provide a characteristic color to it. For example, if the tip of a rod is impregnated with a drop of Ca2 + solution (the previous notation indicates that it is the calcium ion, that is, the calcium atom that has lost two electrons), the color observed is brick red .

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Answer:

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Plz download the doc and answer its due in 20 mins like bro wth

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