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Oduvanchick [21]
4 years ago
13

The compound NaOH(s) dissolves in water to yield

Chemistry
2 answers:
fomenos4 years ago
5 0
When Sodium hydroxide (NaOH ) reacts with H2O the reaction is - Na ( positively charged ) + OH (  with negative charge ) + H2O , therefore B should be the answer . 
Ivan4 years ago
5 0

Answer: Option (1) is the correct answer.

Explanation:

Sodium hydroxide is a strong base and when it is dissolved in water it completely dissociates into ions.

The chemical equation for this dissociation is as follows.

           NaOH(s) + H_{2}O(l) \rightarrow Na^{+}(aq) + OH^{-}(aq)

Therefore, we can see that sodium ions are the only positive ions and hydroxide ions are the only negative ions formed upon dissociation of NaOH in water.

Thus, we can conclude that the compound NaOH(s) dissolves in water to yield hydroxide ions as the only negative ions.

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The heat equation, as given in the introduction, can also be rearranged to calculate the mass or temperature change for a substa
notka56 [123]

Answer:

The correct answer is 281.39 grams.

Explanation:

To arrive at this answer you must first keep in mind the basic equation:

<em>Q = m*Cp* ΔT</em>

Now, in order to calculate the necessary aluminum mass that absorbs 2138 J when passing from 14.83 to 23.31 ° C you must "clear" <em>m</em> of the previous equation.

This means, leave only the mass on one side of the equation, and "pass" <em>Cp</em> and <em>ΔT</em> to the other side dividing <em>Q</em>.  This would look like this:

m= Q/ (Cp*ΔT)

Then, <u>you need the value of specific heat of aluminum</u> in the correct units, that is J / g ° C, the approximate value is 0.896.

ΔT is calculated by doing the mathematical operation:

23.31 °C - 14.83 °C = 8.48 °C

<em> Finally, the values of: Q (data provided in joules), Cp (J / g ° C) and ΔT (calculated in ° C) are replaced in the last equation and the mass (in grams) is calculated resulting in 281.39 grams.</em>

3 0
4 years ago
Which of the following substances will cross the cell membrance through osomosis
Nostrana [21]

Answer:Water, carbon dioxide, and oxygen are among the few simple molecules that can cross the cell membrane by diffusion (or a type of diffusion known as osmosis ).

Explanation:

5 0
3 years ago
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Scrat [10]
77.

To find the answer u have to subtract the atomic mass from the atomic number.
5 0
4 years ago
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Furkat [3]

Answer:

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Explanation:

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8 0
3 years ago
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Likurg_2 [28]

Answer:

18 True

19 True

20 False

21 True

Explanation:

7 0
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