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shusha [124]
4 years ago
14

If the oh is 6.46(10^-9)M what is the pOH

Chemistry
1 answer:
bagirrra123 [75]4 years ago
3 0

Answer: Thus pOH has value of 8.19

Explanation:

pH or pOH is the measure of acidity or alkalinity of a solution.

pOH is calculated by taking negative logarithm of hydroxide  ion concentration.

pOH=-\log [OH^-]

Putting in the values:

pOH=-\log[6.46\times 10^{-9}]

pOH=8.19

Thus pOH has value of 8.19

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Balance the equations by inserting coefficients as needed.
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2ZnO + C ---> 2Zn + CO2

2SO2 + 02 ---> 2SO3

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3 years ago
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Match each of the following descriptions to thecorrect element listed
Slav-nsk [51]

Answer: Please see explanation for answer

Explanation:Matching the  descriptions to the correct element listed gives

Element Group Name Group No Metal/ Nonmetal/ Metalloid Description

Neon    Noble gases       18           Non metal Colorless, tasteless, and        odorless gas, unreactive, nonconductive.

Bromine      Halogens   17          Non metal Not found as a free element (uncombined) in nature, reddish-brown liquid that vaporizes readily at room temperature to a red gas with a strong disagreeable odor.

Beryllium       Alklaline earth metal  2    Metal  Silvery-white, ductile, malleable, conductive solid with a high melting point for this type of element

Platinum     Platimum group metals  10   Metal      Silvery white, relatively soft, low density, conductive solid that is not found as a free element in nature but commonly found combined in alloys with copper or nickel

Potassium   Alkali Metals   1   Metal  Soft, easily cut with a knife to expose a silvery surface that rapidly oxidizes in air; never found uncombined in nature

Silicon    Carbon family     1`4  Metalloid   Metallic luster and grayish solid, very common in rocks and gemstones such as amethyst and opal, semiconductor

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4 0
3 years ago
Why are redox reactions used in batteries?
Lelechka [254]

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The attraction between charged ions releases energy. The movement of electrons creates an electric current. Dont put down the same exact awser that i did.

Explanation:

       

6 0
4 years ago
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C. Another radioisotope of americium exists which has an atomic mass of 242.
ollegr [7]

Answer:

1 g  

Explanation:

The half-life of Am-242 (16 h) is the time it takes for half of it to disappear.

We can make a table of the mass left after each half-life.

\begin{array}{cccc}\textbf{No. of} & & \textbf{Percent} & \textbf{Mass}\\\textbf{Half-lives} & \textbf{Time/h} & \textbf{Remaining} & \textbf{Remaining/g}\\0& 0 & 100 & 8\\1 & 16 &50 & 4\\2 & 32 & 25 & 2\\3 & 48 & 12.5 & 1\\4 & 64 & 6.25 & 0.5\\\end{array}

The mass remaining after 48 h  is 1 g.

7 0
3 years ago
1. A bacterium that can use NO3 - as a terminal electron acceptor is found to contain sulfur granules. This cell . . . A. reduce
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Chemotrophs can be defined as the organism which has the ability to get energy by the oxidation of electron donors present in the nearby environments.

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These bacteria reduce the nitrate into nitrite and the energy source for these bacteria is thiosulfate(sulfur).

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