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Talja [164]
3 years ago
6

Researchers want to determine the best temperatures for storing batteries. Describe a possible experiment and list the variables

to be controlled in the experiment. Be sure to identify the manipulated and the responding variables.
Chemistry
1 answer:
Andrew [12]3 years ago
4 0
How about putting one battery in the freezer while putting another by a radiator or something that gives off heat. Leave them for an hour, then place them in an object that uses batteries and time how long it takes for it to die: Note: It may take many hours for the battery to fully deplete.
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The following reaction shows the process of rusting. 4Fe + 3O2 2Fe2O3 This chemical reaction should be classified as _____.
Vlad [161]
Synthesis.  Which is "<span>Noun. (plural syntheses) The formation of something complex or coherent by combining simpler things. (chemistry) The reaction of elements or compounds to form more complex compounds.".....According to www.dictionary.com.</span>
7 0
3 years ago
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What is a logical way that you could begin to investigate why your tire had low air pressure? Look to see if there is a hole in
MrRissso [65]

Answer:

Any of the answers given will work

Explanation:

I literally just did it.

7 0
3 years ago
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If a substance is composed entirely of one type of atom, it is known as a(n) _______.
Firlakuza [10]
<span>A substance is composed entirely of one type of atom, it is known as a Chemical element
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8 0
3 years ago
How the calculation of the [OH-], pH and % ionization for 0.619 M ammonia (NH3) NH3 + H2O (liq) rightwards harpoon over leftward
fomenos

Answer:

[OH⁻] = 3.34x10⁻³M; Percent ionization = 0.54%; pH = 11.52

Explanation:

Kb of the reaction:

NH3 + H2O(l) ⇄ NH4+ + OH-

Is:

Kb = 1.8x10⁻⁵ = [NH₄⁺] [OH⁻] / [NH₃]

<em>As all NH₄⁺ and OH⁻ comes from the same source we can write: </em>

<em>[NH₄⁺] = [OH⁻] = X</em>

<em>And as </em>[NH₃] = 0.619M

1.8x10⁻⁵ = [X] [X] / [0.619M]

1.11x10⁻⁵ = X²

3.34x10⁻³ = X = [NH₄⁺] = [OH⁻]

<h3>[OH⁻] = 3.34x10⁻³M</h3><h3 />

% ionization:

[NH₄⁺] / [NH₃] * 100 = 3.34x10⁻³M / 0.619M * 100 = 0.54%

pH:

As pOH = -log [OH-]

pOH = 2.48

pH = 14 - pOH

<h3>pH = 11.52</h3>
5 0
3 years ago
How much energy is absorbed in breaking up the water molecules?
tiny-mole [99]

Answer:

1852 kJ/mol

Explanation:

3 0
3 years ago
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