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2 years ago

Do you think more chemical reactions that occur in the human body are endothermic or exothermic? Justify your answer.

Chemistry

1 answer:

77julia77 [94]2 years ago

6 0

Answer:

Exothermic

Explanation:

We as humans do not absorb heat. A good way to think about it is that when we workout we use energy from our body which causes our body temperature to rise. The energy used from food maintains our blood, respiration, and other systems in optimal condition. This requires energy from our body which ends up leaving the body as heat.

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Caleb has a 860-kilogram car sitting in his back yard, gathering rust.

emmasim [6.3K]

<h3>Answer:</h3>

A. 860 kg

<h3>Explanation:</h3>

To answer the question we need to understand that;

Mass refers to the amount of matter in an object.
Weight, on the other hand, refers to the gravitational pull of an object to a given surface.
Mass is measured using a spring balance.

We also need to know that;

The mass of an object remains constant every where irrespective of the gravitational acceleration.

Therefore, an object on the surface of the earth would have the same mass as on the surface of the moon.
In this case; the mass of the car remains the same on the outer space as on the back yard.

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3 years ago

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How does changing the pressure affect the chemical reaction?

olasank [31]

A is the answer
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3 years ago

The ____________________ is done first so that you know how you want to go about your ____________________.

N76 [4]

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2 years ago

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What is the number of electrons that can be held in the first orbit closest to the nucleus

Juliette [100K]

The first shell can hold up to 2 electrons, the second shell can hold up to 8 (2 + 6) electrons, the third shell can hold up to 18 (2 + 6 + 10) and so on.

5 0

2 years ago

group of atoms that gains or loses electrons is called _______. A. a polar ion B. a non-polar ion C. a polyatomic ion D. a commo

raketka [301]

Answer: Option (C) is the correct answer.

Explanation:

An ion is defined as a specie which is formed when a neutral atoms tends to gain or lose an electron.

When a neutral atom gain an electron then it forms a negative ion whereas when a neutral atom tends to lose an electron then it forms a positive ion.

For example, a neutral fluorine atom on gaining an electron will form $F^{-}$ ion. And, a sodium atom on losing an electron forms $Na^{+}$ ion.

When a group of atoms form ions then it tends to form polyatomic ions.

Thus, we can conclude that group of atoms that gains or loses electrons is called a polyatomic ion.

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3 years ago