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PtichkaEL [24]
3 years ago
5

Please help thanks very much extra points given

Chemistry
2 answers:
Zepler [3.9K]3 years ago
4 0
Because paper cannot withstand water. not any type of paper. plus it also states that it can hold up to 8 mL of water
V125BC [204]3 years ago
4 0
It is the strongest and most absorbent brand
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Quantitative is a description in numbers , and qualitative is a description with words
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3 years ago
The pKa of the α‑carboxyl group of serine is 2.21 , and the pKa of its α‑amino group is 9.15 . Calculate the average net charge
sleet_krkn [62]

Answer:

Net charge in serine at pH equal to 8.30 is "0"

Explanation:

  • At pH > pK_{a}, carboxyl group exists as -CO_{2}^{-} (charged)
  • At pH < pK_{a}, carboxyl group exists as -COOH (neutral)
  • At pH > pK_{a}, amino group exists as -NH_{2} (neutral)
  • At pH < pK_{a}, amino group exists as -NH_{3}^{+} (charged)
  • So, at pH = 8.30, both carboxyl and amino group exists in charged state.
  • Net charge in serine at pH equal to 8.30 is "0".
  • Structure of serine at pH equal to 8.30 has been shown below.

8 0
3 years ago
You want to create 14.0 g of copper to meld into a piece of jewelry. You
Yuki888 [10]

Answer:

3.4g of Al

Explanation:

you would need to start with 3.4 g of Al

3 0
3 years ago
Given the equation representing a system at equilibrium:
polet [3.4K]
I think the one that cause the equilibrium to shift would be :
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Adding the noble gas will add more concentration to the KNO3, which will create different amount of equilibrium

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3 years ago
How many molecules of CO2 are in 8.6 mol of CO2?
Anastasy [175]

Answer: You’d have to convert from mol to molecule.

Explanation: Like this:

8 0
2 years ago
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