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There are five things:

  • Color change
  • odor
  • state change (from liquid to solid, liquid to gas, etc...),
  • gives off at precipitate
  • a temperature change
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10y ago
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5mo ago

Three things that show evidence of a chemical reaction are: formation of a new substance, changes in energy (such as production of heat or light), and changes in physical properties (color change, gas production, or formation of a precipitate).

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Q: What are three things that show evidence of a chemical reaction?
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Continue Learning about Chemistry

What are the three main parts of a chemical equation?

The three main parts of a chemical equation are the reactants, the arrow representing the reaction, and the products. Reactants are the substances that participate in the reaction, while products are the substances formed as a result of the reaction. The arrow indicates the direction of the reaction from reactants to products.


What are 3 things that show evidence of a chemical reaction?

Formation of a precipitate or gas: A visible solid (precipitate) forming when two solutions are mixed or the evolution of a gas (bubbles) indicates a chemical reaction. Color change: A change in color during a reaction suggests that new substances with different properties have formed. Temperature change: Exothermic reactions release heat, leading to a temperature increase, while endothermic reactions absorb heat, causing a temperature decrease.


What three things make up gunpowder?

Gunpowder is made up of three main components: potassium nitrate (also known as saltpeter), charcoal, and sulfur. These ingredients undergo a chemical reaction when ignited, producing the explosive combustion that propels a bullet out of a gun.


What 3 things need to happen in order for a chemical reaction to occur?

For a chemical reaction to occur, typically three things need to happen: reactant molecules must collide with enough energy to overcome activation energy, proper orientation of colliding molecules must occur, and the reaction must proceed in a way that forms new chemical bonds and products.


What is the chemical reaction between ammonia and hydrogen?

The chemical reaction between ammonia (NH3) and hydrogen (H2) is as follows: 3H2 + N2 --> 2NH3 This reaction results in the formation of ammonia (NH3) by combining three molecules of hydrogen gas (H2) with one molecule of nitrogen gas (N2).

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What is polymerisation reaction?

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What are three things that chemical equations can tell you about a chemical reaction?

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What are Three things all living things need?

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What are 3 things that show evidence of a chemical reaction?

Formation of a precipitate or gas: A visible solid (precipitate) forming when two solutions are mixed or the evolution of a gas (bubbles) indicates a chemical reaction. Color change: A change in color during a reaction suggests that new substances with different properties have formed. Temperature change: Exothermic reactions release heat, leading to a temperature increase, while endothermic reactions absorb heat, causing a temperature decrease.


What are three things that are contaminated?

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