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sammy [17]
3 years ago
14

Which of these are characteristics of all arthropods? (Select all that apply.)

Chemistry
1 answer:
Brut [27]3 years ago
8 0
Not 6 legs, the have everything else
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Where does the chemical energy to produce ATP come from
aleksandrvk [35]

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glucose

Explanation:

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Atoms of hydrogen can become helium atoms during a chemical reaction.<br> True<br> False
marishachu [46]

Answer:

false

in chemical reaction element doesnot change into another

Explanation:

3 0
3 years ago
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An electrochemical cell is composed of pure nickel and pure iron electrodes immersed in solutions of their divalent ions at room
Andrej [43]

Answer:

0.758 V.

Explanation:

Hello!

In this case, case when we include the effect of concentration on an electrochemical cell, we need to consider the Nerst equation at 25 °C:

E=E\°-\frac{0.0591}{n} log(Q)

Whereas n stands for the number of moles of transferred electrons and Q the reaction quotient relating the concentration of the oxidized species over the concentration of the reduced species. In such a way, we can write the undergoing half-reactions in the cell, considering the iron's one is reversed because it has the most positive standard potential so it tends to reduction:

Fe^{2+}+2e^-\rightarrow Fe^0\ \ \ E\°=0.440V\\\\Ni^0\rightarrow Ni^{2+}+2e^-\ \ \ E\°=-0.250V

It means that the concentration of the oxidized species is 0.002 M (that of nickel), that of the reduced species is 0.40 M and there are two moles of transferred electrons; therefore, the generated potential turns out:

E=(0.440V+0.250V)-\frac{0.0591}{2} log(\frac{0.002M}{0.40M} )\\\\E=0.758V

Beat regards!

8 0
3 years ago
How can a scientist prevent bias in a scientific investigation
BaLLatris [955]
They must make sure that all things pointed out are fact, not opinion.
5 0
3 years ago
A chemical indicator that changes colors depending on the concentration of h+ in the solution is called a
DanielleElmas [232]
Answer is: acid-base indicator or pH indicators.

Acid-base indicators are usually weak acids or bases and they are chemical<span> detectors for hydrogen or hydronium cations.</span>
Example for acid-base indicator is phenolphthalein (molecular formula C₂₀H₁₄O₄). Phenolphthalein is <span>colorless in </span>acidic<span> solutions and pink in </span>basic<span> solutions.
Another example is m</span><span>ethyl orange. It is red colour in acidic solutions and yellow colour in basic solutions.</span>

3 0
3 years ago
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