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Slav-nsk [51]
2 years ago
14

What do calories provude for the human body?

Chemistry
2 answers:
34kurt2 years ago
8 0
Your body needs calories just to operate — to keep your heart beating and your lungs breathing. As a kid, your body also needs calories and nutrients from a variety of foods to grow and develop. And you burn off some calories without even thinking about it — by walking your dog or making your bed.
lana66690 [7]2 years ago
5 0

Answer:

energy for the body to work

Explanation:

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How many kilojoules of heat
Luba_88 [7]

Answer:Noble gases:

 are highly reactive.

 react only with other gases.

 do not appear in the periodic table.

 are not very reactive with other elements.

Explanation:Noble gases:

 are highly reactive.

 react only with other gases.

 do not appear in the periodic table.

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6 0
2 years ago
Most plants and all animals depend on _____ to meet their need for nitrogen.
kirill115 [55]
They depend on nitrogen-fixing bacteria, which convert atmospheric nitrogen into a usable form.
3 0
3 years ago
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BigorU [14]

Answer:

The first option: Strontium Fluorate.

Explanation:

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8 0
3 years ago
. In which reaction is nitric acid acting as an oxidising agent?
Talja [164]

Answer:

B. Cu + 4HNO3 → Cu(NO3)2 + 2H2O + 2NO2

Explanation:

Hello,

In this case, we should understand oxidizing agents as those substances able to increase the oxidation state of another substance, therefore, in B. reaction we notice that copper oxidation state at the beginning is zero (no bonds are formed) and once it reacts with nitric acid, its oxidation states raises to +2 in copper (II) nitrate, thus, in B. Cu + 4HNO3 → Cu(NO3)2 + 2H2O + 2NO2 nitritc acid is acting as the oxidizing agent.

Moreover, in the other reactions, copper (A.), sodium (C. and D.) remain with the same initial oxidation state, +2 and +1 respectively.

Regards.

8 0
3 years ago
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Describe a solution and tell if the parts are mixed chemically or physically.
ANTONII [103]
Hey there! Let's get that problem solved! 

First: Let's define, "solution." 

Solution: <span>a liquid mixture in which the minor component (the solute) is uniformly distributed within the major component (the solvent).

Next: Ask yourself, "can a solution be taken apart?" 

In some cases, yes. It can. 

The solution of salt water for example, can be physically separated by evaporation. (place salt-water in a pot on a heated stove, place the cover to the pot on the opening, wait a few minutes, remove the top, and you can (and taste) the water without the salt!)  </span><span />
4 0
3 years ago
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