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VMariaS [17]
4 years ago
7

If the chemical X-gal is added to nutrient agar, lactose fermenting colonies turn blue, while non-fermenting colonies appear whi

te. What sort of medium is X-gal agar?
Chemistry
1 answer:
xxMikexx [17]4 years ago
6 0

Answer:

C. Differential.

Explanation:

Differential media are bacteriological growth media that contain specific ingredients to allow one to distinguish selected species or categories of bacteria by visual observation. Examples of differential media includes:

Blood agar (used in strep tests) contains bovine heart blood that becomes transparent in the presence of β-hemolytic organisms such as Streptococcus pyogenes and Staphylococcus aureus.

Eosin methylene blue is differential for lactose fermentation.

Streptococcuseosin methylene blue (EMB), which is differential for lactose and sucrose fermentation.

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explanation:
1. write the balanced equation.
2KClO
3
→
2KCl
+
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2

2. calculate the moles of
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=
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g KClO
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×
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3
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=
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3

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3
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