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Sloan [31]
4 years ago
8

An increase or decrease in energy during a chemical reaction is called

Chemistry
1 answer:
topjm [15]4 years ago
5 0
In an exothermic reaction (exo, think “out”) heat is released. In an endothermic (endo, think “in”) reaction heat is absorbed. Heat is a type of energy.
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By definition 12 grams of carbon-12 must contain how many atoms?
krek1111 [17]
It is defined as the amount of a substance that contains as many particles as there are atoms in 12 grams of pure carbon-12. So, 1 molecule contains 6.022×10^23 elementary entities of the substance.

Hope that helps
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4 years ago
Elements that belong to the same period/row!!
-BARSIC- [3]

Answer:

Each row is called a period. Each column is called a group or family.

Explanation:

7 0
3 years ago
Colorea los recuadros que representan la acciones viables para usar racionalmente los recursos y contaminar menos
In-s [12.5K]

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Es fundamental para la preservación y mantenimiento del medio ambiente y la calidad de vida de las generaciones actuales y futuras. El desarrollo de acciones sostenibles promueve la protección del medio ambiente, los ecosistemas y los recursos naturales.

Por lo tanto, todas las personas e instituciones económicas pueden promover la sostenibilidad a través de prácticas fáciles de ejecutar que ayuden a preservar y proteger el medio ambiente.

Encuentre más información sobre sostenibilidad aquí:

brainly.com/question/23701037

7 0
3 years ago
Which of the following materials is necessary to stop a beta particle
stich3 [128]
The material needed to stop a beta particle is c. thin pieces of wood.
5 0
3 years ago
*click image*
nadya68 [22]

Answer:

Its be 1,2 and 4.

Explanation:

Since changing the direction won't do anything to a electric magnet.

6 0
3 years ago
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