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riadik2000 [5.3K]
3 years ago
5

Why is each year's vaccine different?

Chemistry
2 answers:
Degger [83]3 years ago
5 0
Because the birds that fly overseas carry different flu viruses every year.
Gemiola [76]3 years ago
5 0

Answer:

Flu vaccinations are needed each year to ensure you have continuous protection. Though you may have received a flu vaccine last year, your body's immune system from previous vaccinations gradually decreases over time. By the time flu season comes around, your body's immunity to it is virtuality non-existent.

Explanation:

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Consider the balanced equation below.
Karo-lina-s [1.5K]

The correct option is (a) H₂S : SO₂ = 2 : 2 and O₂ : H₂O = 3 : 2

<h3>What is molar Ratio ?</h3>

Molar ratio also known as stoichiometry is the ratio in which the reactants and products are either formed or reacted in the given equation

the balanced equation is as follows ;

2H₂S + 3O₂ --> 2SO₂ + 2H₂O

molar ratio can be determined by the coefficients of the compounds in the balanced reaction.

coefficient is the number in front of the chemical compound

coefficients for the compounds in this reaction are as follows ;

  • H₂S - 2
  • O₂ - 3
  • SO₂ - 2
  • H₂O - 2

therefore, correct option is (a) H₂S:SO₂ = 2:2 and O₂:H₂O = 3:2

Learn more about molar ratio here ;

brainly.com/question/17920577

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4 0
2 years ago
What type of heat transfer warms our oceans and atmosphere
Arisa [49]
The answer is Conduction. I hope this helps!
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3 years ago
Need help asap!!!!<br> will mark brainliest!!!
SOVA2 [1]

Answer:

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Explanation:

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3 years ago
When you receive a loan, the money the lender gives you is called the ____________. A. Interest B. Line of credit C. Principal D
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C. Principal !!!!!!!!!


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Riley is doing an experiment working with friction. He wants to find two ways to modify an object that could increase or decreas
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