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stich3 [128]
3 years ago
15

Consider the partial equation. Br2 + NaF --> Which best completes the chemical equation?

Chemistry
2 answers:
Brrunno [24]3 years ago
7 0
I believe the correct answer from the choices listed above is the first option. When <span>Br2 and NaF are mixed, no reaction would occur since Br cannot replace F in NaF. Hope this answers the question. Have a nice day. Feel free to ask more questions.</span>
balandron [24]3 years ago
5 0

Answer is (1) - no reaction.


<em>Explanation; </em>


Some of you may think this reaction as a single replacement reaction which gives NaBr + F₂ as products.


But, according to the reactivity of the halogens, reactivity decreases from up to bottom of the group. F is placed above Br. Hence, F is more reactive than Br. Hence, Br can't replace F.




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Which statement best explains why the elements in Group 18 do not have electronegativity values?
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Answer:

1) The elements have filled valence levels.

Explanation:

Since they have filled valence levels, they're stable and don't need to electrons to fill their valence shells since they're already full.

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5 0
2 years ago
(e) Another student investigated the rate of a different reaction
vodka [1.7K]

Answer:

0.07 g/s.

Explanation:

From the question given above, the following data were obtained:

Mass lost = 9.85 g

Time taken = 2 min 30 s

Mean rate =?

Next, we shall convert 2 min 30 s to seconds (s). This can be obtained as follow:

1 min = 60 s

Thus,

2 min = 2 × 60 = 120 s

Therefore,

2 min 30 s = 120 s + 30 s = 150 s

Finally, we shall determine the mean rate of the reaction. This can be obtained as illustrated below:

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Mean rate =?

Mean rate = mass lost / time taken

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Therefore, the mean rate of the reaction is 0.07 g/s

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