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V125BC [204]
3 years ago
5

HELP !! For the principal quantum number n equals 2, we can have sub-levels.

Chemistry
1 answer:
Charra [1.4K]3 years ago
6 0

Answer: d both a and b

Explanation:

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NEED HELP ASAP!!! What is the density of each of the following gases at STP? Show your work.
BaLLatris [955]

Answer:

A. 1.63g/dm^3 (3 s.f.)

B. 0.833g/dm^3 (3 s.f.)

C. 1.92g/dm^3 (3 s.f.)

Explanation:

Please see attached picture for full solution.

3 0
3 years ago
What is the oxidation number of s in na2s4o6?
Novosadov [1.4K]

Answer:

+2.5

Explanation:

So the oxidation number of S in Na2S4O6is +2.5.

7 0
3 years ago
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Why is the atomic radius of iodine greater than the atomic radius of fluorine?
Artist 52 [7]

Answer:

Iodine has more electron levels (rings) than fluorine.

Explanation:

On the periodic table,  fluorine is on period 2 so it has 2 outer rings, iodine is on period 5 so it has 5 outer rings. The more rings the higher radius.

7 0
3 years ago
Ammonia chemically reacts with oxygen gas to produce nitric oxide and water
Agata [3.3K]

9.98 g of NH₃ reacts with 23.4 g of O₂ (up to 3 significant figure).

<h3>What is Significant figures ?</h3>

The digits of a number that are used to express it to the required degree of accuracy, starting from the first non-zero digit.

The given chemical equation ;

4NH₃ + 5O₂ ---> 4NO + 6H₂O

Therefore,

4 moles of NH₃ reacts with 5 moles of O₂.

i.e,

68 g of NH₃ reacts with 160g of O₂.

Therefore,

9.98 g of NH₃ reacts with :

      = 160/68 x 9.98

      = 23.4 g of O₂ (up to 3 significant figure)

Learn more about Significant figures here ;

brainly.com/question/13386983

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5 0
2 years ago
Why is citric acid added to food?
dolphi86 [110]

Answer:  Option (b) is the correct answer.

Explanation:

Chemical formula of citric acid is C_{6}H_{8}O_{7}.

It is acidic in nature and therefore, it is used to add tartness or sour flavor to the food like jams, jellies, candies etc.

It is also used as a preservative and thus it helps to preserve various food items for a longer period of time.


3 0
3 years ago
Read 2 more answers
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