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Rama09 [41]
2 years ago
13

are medications typically used to relieve excessive mucus in nasal pathways. a) Radioactive isotopes b) Expectorants c) Deconges

tants O d) Antibiotics and anti-inflammatories
Chemistry
1 answer:
Mrac [35]2 years ago
8 0

Answer:

c) decongestants relive excessive muscle in nasal pathways

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Out of the five major mass extinction, one is Cretaceous-Tertiary extinction (K-T extinction). It happened 66 million years ago marked by the end of the Cretinous period.
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What are the correct coefficients for each reactant and product when this equation is balanced? Make sure to select the correct
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Explanation:

5 0
3 years ago
If nitrogen-13 has a half life of 2.5 years, how much remains from a 100g sample after 7.5 years
Sonbull [250]

Answer:

12.50g

Explanation:

T½ = 2.5years

No = 100g

N = ?

Time (T) = 7.5 years

To solve this question, we'll have to find the disintegration constant λ first

T½ = In2 / λ

T½ = 0.693 / λ

λ = 0.693 / 2.5

λ = 0.2772

In(N/No) = -λt

N = No* e^-λt

N = 100 * e^-(0.2772*7.5)

N = 100*e^-2.079

N = 100 * 0.125

N = 12.50g

The sample remaining after 7.5 years is 12.50g

5 0
3 years ago
A solution...
steposvetlana [31]

Answer:

A

Explanation:

8 0
3 years ago
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