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olga55 [171]
2 years ago
12

There is more than one kind of balance used in the laboratory. true or false

Chemistry
2 answers:
Triss [41]2 years ago
6 0
The correct answer is false. Not only one type of balance is present in a laboratory. Most laboratory I've worked into owns two types of balance namely the analytical balance and the top-loading balance. The former is used for accurate mass readings and those needs smaller amounts of a substance while the latter is used for approximation and large amounts of substances.
jolli1 [7]2 years ago
3 0

There is more than one type of balance used in chemistry, or science in all,seeing as the verified answer claims that it is false, then lists multiple types of balances.So the answer is TRUE

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Answer:

0!

Explanation:

  • You need to search your pKa values for Asn (2.14, 8.75), Gly (2.35, 9.78) and Leu(2.33, 9.74), the first value corresponding to -COOH, the second to -NH3 (a third value would correspond to an R group, but in this case that does not apply), and we'll build a table to find the charges for your possible dissociated groups at indicated pH (7), we need to remember that having a pKa lower than the pH will give us a negative charge, having a pKa bigger than pH will give us a positive charge:            

           

                   -COOH         -NH3              

pH 7------------------------------------------------------              

Asn               -                      +

Gly                -                      +

Leu               -                      +

  • Now that we have our table we'll sketch our peptide's structure:

<em>HN-Asn-Gly-Leu-COOH</em>

This will allow us to see what groups will be free to react to the pH's value, and which groups are not reacting to pH because are forming the bond between amino acids. In this particular example only -NH group in Ans and -COOH in Leu are exposed to pH, we'll look for these charges in the table and add them to find the net charge:

+1 (HN-Asn)

-1 (Leu-COOH)

=0

The net charge is 0!

I hope you find this information useful and interesting! Good luck!

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Answer:

here you go

Explanation:

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