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Gre4nikov [31]
3 years ago
7

What did you know for sure after one Test? Two tests? Three tests?

Chemistry
2 answers:
OlgaM077 [116]3 years ago
7 0

Answer:

vaiana and I have been working with our team since we been through

Lorico [155]3 years ago
6 0

Answer:

I knew that I learned something and passed that test. And that is all I want to do.

Explanation:

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What is the ph of with a 4.6 x 10-6 M hydroxide ion concentration?
nlexa [21]
<h3>Answer:</h3>

pH = 8.66

<h3>Explanation:</h3>
  • The pH refers to the acidity or alkalinity of a solution.
  • It is calculated by getting the negative logarithm of Hydrogen ions concentration.
  • pH=-log[H⁺]

In this case;

we are given [OH⁻] as 4.6 x 10^-6 M

We are required to calculate the pH

We need to know that;

pH + pOH = 14

pOH = -log[OH⁻]

To get the pH we can calculate the pOH first,

pOH = -log[4.6 x 10^-6 M]

        = 5.34

but, pH + pOH = 14

Therefore, pH = 14 - pOH

                        = 14 - 5.34

                        = 8.66

Therefore, the pH of the solution is 8.66

3 0
3 years ago
There are 81 amino acid residues in the precursor molecule of bovine insulin. What is the least number of bases that must be in
Usimov [2.4K]
If you count the methionine expressed for the start codon as part of the precursor protein, then (81+1)*3. (The start codon is expressed, but the stop codon isn't.) 
8 0
4 years ago
Read 2 more answers
Would your work in cleaning the beach be considered physical or a chemical change to the environment? Explain your reasoning.
gregori [183]
Physical because it can easily turn back into the original "substance"
6 0
4 years ago
Can we create matter? Why or why not?
Ivanshal [37]

Answer:

The first law of thermodynamics doesn't actually specify that matter can neither be created nor destroyed So yes we can create matter because matter is every where buildings ,structures etc. So the answer is yes!

Explanation:

 

                         Hope this helped!ヾ(•ω•`)o❤

6 0
3 years ago
Where does oxidation occur in an electrochemical cell?
AlladinOne [14]
Option No. 1 at the cathode in both an electrolytic cell and a voltaic cell

Negative ion arrives at the anode, attracted by electrostatic forces, where they lose electrons. Loss of electrons is defined as oxidation.

The reverse process occur at the negative electrode, where positive ions pick up electrons. They are reduced.
8 0
4 years ago
Read 2 more answers
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