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Deffense [45]
4 years ago
14

The standard cell potential (E°) of a voltaic cell constructed using the cell reaction below is 0.76 V:Zn (s) + (aq) ? (aq) + (g

)With = 1.0 atm and [ ] = 1.0 M, the cell potential is 0.66 V. The concentration of inthe cathode compartment is __________ M.A) 4.9 × 10^1B) 2.0 × 10^-2C) 1.0 × 10^-12D) 4.2 × 10^-4E) 1.4 × 10^-1
Chemistry
1 answer:
gladu [14]4 years ago
8 0
I can’t see any this what the question
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A student pipets 10 ml of a 0.0693 m solution of kbr into a 500 ml volumetric flask and dilutes to the mark. what is the concent
Sonja [21]

The initial concentration of solution is 0.0693 M. The volume of solution taken is 10 mL and it is diluted to a final volume of 500 mL.

According to dilution law, the product of initial concentration and volume is equal to the product of final concentration and volume as follows:

C_{1}V_{1}=C_{2}V_{2}

Here, C_{1} is initial concentration, C_{2} is final concentration, V_{1} is initial volume and V_{2} is final volume.

Rearranging to calculate final concentration,

C_{2}=\frac{C_{1}\times V_{1}}{V_{2}}

Putting the values,

C_{2}=\frac{0.0693 M\times 10 mL}{500 mL}=0.001386 M

Therefore, concentration of the resulting solution is 0.001386 M.

7 0
3 years ago
Nylon is a polymer which is termed as
valkas [14]
Nylon is named as the most useful synthetic material. Nylon belongs to a family of materials called "polyamides."
4 0
3 years ago
Rank the following elements by increasing atomic radius: Carbon, aluminum, oxygen, potassium.
Aloiza [94]

Answer

The elements in increasing order of atomic radius: oxygen, carbon, aluminum, potassium

Explanation:

The distance from the center of the nucleus to the outermost shell of the electron is known as the atomic radius of an element. The atomic radius decreases rightward along each period (row) of the table due to the increase in effective nuclear charge (the charge of the nucleus equal to the number of protons). Across a period, electrons are added to the same energy level and the increasing number of protons causes the nucleus to exert more pull on these electrons, which makes the atomic radius smaller.  Atomic radius increases down each group (column) of the periodic table because of the addition of electrons to higher energy levels, which are further away from the nucleus and the pull of nucleus weakens. Another reason for the increase in atomic radius is the electron shielding effect, which is the reduction of the attractive force between a nucleus and its outer electrons due to the blocking effect of inner electrons

While moving from left to right in the second period, c arbon comes before  oxygen  and so oxygen will have a smaller atomic radius than  carbon. While moving down the periodic table, al uminum comes before  potassium even if they are not in the same period. So aluminum 's atomic radius will be smaller than that of  potassium  but bigger than that of  carbon  and  oxygen.

(hope that helps can i plz have brainlist it will make my day :D hehe)

8 0
3 years ago
Help plzzz Convert 6.1 ks to s.
Nostrana [21]

Answer:  6100 seconds

Explanation:                                                                                                            6.1 Kiloseconds = 6100 Seconds

5 0
3 years ago
The electrostatic attraction between positively charged nuclei and negatively charged electrons permits two atoms to be held tog
Serggg [28]

Answer:

The correct answer is a. chemical bond. See the explanation below, please.

Explanation:

The resulting electrostatic interaction is called ionic bond between ions of opposite charge (one negative and one positive). This allows the attraction between both charges, constituting a chemical compound. Eg the Sodium (Na +) ion combines with the Chlorine (Cl-) ion forming Nacl (sodium chloride, known as table salt).

6 0
3 years ago
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