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zloy xaker [14]
3 years ago
5

What is the role of an indicator? Predict how the glucose test strips and iodine would react with the following foods: Grape Tom

ato Summer squash Orange Bell pepper
Biology
1 answer:
pogonyaev3 years ago
8 0
The main role of an indicator is to establish the equivalence point when two substance has reached its neutralization process. The purpose of an indicator is to determine how acidic or basic the product or solution is. Indicator solutions work by actually reacting with the components of food that they test for, creating a new substance of a different color. This is a chemical reaction.If the substance that they test for is not present in the food, there will be no reaction, and therefore no color change.  The test strips will be more likely to be dark blue or black for  Grape, Tomato, Summer squash, Orange Bell pepper as they all contain starch. Color intensity may vary depending on the level of starch found in the samples. 
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What is the average atomic mass of a sample that has two isotopes, one with a mass of 21 amu at 62% abundance and another with a
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Answer:

Average atomic mass = 21.38 amu.

Explanation:

Given data:

Mass of first isotope = 21 amu

Abundance of first isotope = 62%

Mass of second isotope = 22 amu

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Average atomic mass  = (abundance of 1st isotope × its atomic mass) +(abundance of 2nd isotope × its atomic mass)  / 100

Average atomic mass  = (62×21)+(38×22) /100

Average atomic mass =  1302 +836 / 100

Average atomic mass = 2138 / 100

Average atomic mass = 21.38 amu.

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