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4 years ago

12

The gases that surround Earth or another planet.

1 answer:

yan [13]4 years ago

3 0

Answer:

i think that it is an atmosphere.

Explanation:

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How are subtances dissolved ?

ELEN [110]

Answer: A solute dissolves because its particles interact with the particles of a solvent. Anything that allows more solvent to touch more solute will cause a solute to dissolve more quickly. Small pieces of a substance dissolve faster than large pieces.

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4 years ago

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7 When carbon is heated in a limited supply

irakobra [83]

Answer:

please mark my answer brainliest

Explanation:

its carbon monoxide

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4 years ago

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The pH of a solution is 9.63 ± 0.03 . What is the concentration of H + in the solution and its absolute uncertainty?

Helga [31]

Explanation:

The pH of the solution is 9.63 ± 0.03.

we know that

pH= -log[H+]

⇒[H+] = $10^{-pH}$

= $10^{-9.63}$ = $2.34\times10^{-10}$

Now to find absolute error we use the formula

Absolute error/[H+] =ln10(uncertainity)

Absolute error = ln10×[H+] ×0.03

$=ln10\times2.34\times10^{-10}\times0.03$

= $9.45\times10^{-12}$

8 0

3 years ago

A concentration cell is constructed using two Ni electrodes with Ni2+ concentrations of 1.0 M and 1.00 � 10�4 M in the two half-

Komok [63]

<u>Answer:</u> The cell potential of the cell is +0.118 V

<u>Explanation:</u>

The half reactions for the cell is:

<u>Oxidation half reaction (anode):</u> $Ni(s)\rightarrow Ni^{2+}+2e^-$

<u>Reduction half reaction (cathode):</u> $Ni^{2+}+2e^-\rightarrow Ni(s)$

In this case, the cathode and anode both are same. So, $E^o_{cell}$ will be equal to zero.

To calculate cell potential of the cell, we use the equation given by Nernst, which is:

$E_{cell}=E^o_{cell}-\frac{0.0592}{n}\log \frac{[Ni^{2+}_{diluted}]}{[Ni^{2+}_{concentrated}]}$

where,

n = number of electrons in oxidation-reduction reaction = 2

$E_{cell}$ = ?

$[Ni^{2+}_{diluted}]$ = $1.00\times 10^{-4}M$

$[Ni^{2+}_{concentrated}]$ = 1.0 M

Putting values in above equation, we get:

$E_{cell}=0-\frac{0.0592}{2}\log \frac{1.00\times 10^{-4}M}{1.0M}$

$E_{cell}=0.118V$

Hence, the cell potential of the cell is +0.118 V

5 0

3 years ago

A piece of metal is composed of atoms. Each atom in the metal contains 29 protons. How is the metal classified?

Daniel [21]

Answer:

A transition metal

Explanation:

The metal is classified as a transition metal or transition element.

In particular, this atom is Copper it has an atomic number of 29 which we know by the number of protons.

The number of protons in an atom is the same as the atomic number.

The element can be found in the d-block on the periodic table.
Generally, it is classified as a transition metal.
A neutral atom of this element has 29 electrons.

7 0

3 years ago