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Ilya [14]
3 years ago
7

“Some types of vaccines need only one shot to protect you for the rest of your life. Other types, such as the one for seasonal f

lu, change from year to year and need to be given annually.”
What does the word annually mean?
Chemistry
2 answers:
IrinaK [193]3 years ago
8 0
Yearly, is the answer.
Elodia [21]3 years ago
4 0
The answer is yearly
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Which of the following did your answer include?
IgorC [24]

Answer:

check all 4

Explanation:

3 0
2 years ago
The substances sodium (Na), oxygen (O2), and sodium oxide (Na2O) participate in this chemical reaction:
Andrews [41]

The chemical reaction involving sodium and oxygen as given in the reaction: 4Na + O2 → 2Na2O is a synthesis reaction.

<h3>What are chemical reactions?</h3>

Chemical reactions are changes which occur in the chemical composition of atoms of substances which results in the formation of new substances.

There are different types of chemical reactions such as:

  • synthesis reaction
  • displacement reaction
  • double displacement reactions

A synthesis reaction is a reaction in which two or more substances combine to form a new product.

Therefore, the chemical reaction involving sodium and oxygen as given in the reaction: 4Na + O2 → 2Na2O is a synthesis reaction.

Learn more about chemical reactions at: brainly.com/question/11231920

#SPJ1

7 0
1 year ago
Consider the following system at equilibrium at 723 K: 2 NH3 (g) 26.6 kcal N2 (g) 3 H2 (g) Indicate whether each individual chan
ZanzabumX [31]

Answer:

- To increase the temperature as it is a reactant in terms of its endothermicity.

- To remove it will enable more space for the reactant to favor its production.

- To add more reactant in order to increase its equilibrium concentration.

Explanation:

Hello,

The undergoing chemical reaction is:

2NH_3(g)\rightleftharpoons 3H_2(g)+N_2(g)

Thus, in order to intensify the amount of nitrogen as the chemical reaction is endothermic, considering the Le Chatelier's principle we state:

- To increase the temperature as it is a reactant in terms of its endothermicity.

- To remove it will enable more space for the reactant to favor its production.

- To add more reactant in order to increase its equilibrium concentration.

Best regards.

4 0
3 years ago
How are mass and weight related? Provide an example
larisa86 [58]
<span>Mass is a property that determines how much effort it takes to change somethings velocity. Weight is how much downward force does something exert in a gravitational field which is just the amount of gravity time the mass of an object. We use mass interchangeable with weight because everything on earth experiences the same amount of gravity or close to it, and so something that weighs twice as much as something else also has twice as much mass as that something else. Weight can actually vary for the same mass here on earth the strength of gravity changes from one place to another by small amounts, not enough to ruin your cooking recipe instructions, and weight can change dramatically for something that is falling, the strength of gravity for astronauts in orbit is not much reduced in comparison to here on earth, if there was no gravity they wouldn't go around the earth, they are weightless because they are falling and have enough sideways velocity to keep missing the earth, but their mass has not changed, it still requires effort to get them moving or to stop them.
</span>
6 0
3 years ago
What is one major difference between volcanic activity on Earth and volcanic activity on Mars, Venus, and the moon? Explain.
kow [346]

While the Moon and Mercury have relatively small volcanoes, those on Venus, Earth and Mars are large and numerous.  Earth's volcanoes are still active and Venus' may be, but scientists debate whether Mars' volcanic activity has finished.

8 0
2 years ago
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