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kondaur [170]
3 years ago
14

What is likely to happen if we can't control our experiment properly? A. Our hypothesis will have to be changed. B. We will need

to do other experiments and collect more data. C. Our hypothesis will be well-supported by the data we collect. D. We will have to make more inferences instead of collecting data.
Chemistry
2 answers:
REY [17]3 years ago
4 0
The answer to your question
is b 
katovenus [111]3 years ago
4 0

Answer:

The answer is <u><em>letter D</em></u>

Explanation:

It is the only one that makes sense, i dont have a proper explanation unfortunately, its just guts. sorry, this probably wont help, but i tried agaga

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What is the name of the ionic compound CaCN?
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3 years ago
A concentration cell consisting of two hydrogen electrodes (PH2 = 1 atm), where the cathode is a standard hydrogen electrode and
Lunna [17]

The pH of the unknown solution is 3.07.

<u>Explanation:</u>

<u>1.Find the cell potential as a function of pH</u>

From the Nernst Equation:

Ecell=E∘cell−RT /zF × lnQ

where

R denotes the Universal Gas Constant

T denotes the temperature

z denotes the moles of electrons transferred per mole of hydrogen

F denotes the Faraday constant

Q denotes the reaction quotient

Substitute the values,

E∘cell=0   lnQ=2.303logQ

E0cell=−2.30/RT /zF × log Q

Solving the equation,

<u>2. Find the Q  value</u>

Q=[H+]2prod pH₂, product/ [H+]2reactpH₂, reactant

Q=[H+]^2×1/1×1=[H+]2

Taking the log

logQ= log[H+]^2=2log[H+]=-2pH

From the formula,

Ecell=−2.303RT /zF× logQ

E cell= 2.303 × 8.314 CK mol (inverse)  × 298.15

K × 2pH /2×96 485  C⋅mol

( inverse)

E cell= 0.0592 V × pH

<u>3. Finding the pH value</u>

E cell= 0.0592 V × pH

pH = E cell/ 0.0592 V= 0.182V/ 0.0592V

pH=3.07

The pH of the unknown solution is 3.07.

7 0
3 years ago
Cómo escribir el símbolo Theta
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Para escribir el símbolo theta, presione 03B8 + Alt + X.
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