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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 Three Things can happen when a Chemical Reaction occur?

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What are the three main parts of a chemical equation?

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What are the 3 requirements are needed to make fire?

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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 factors of the speed at which a chemical reaction happens?

temperature presence or absence of a catalyst concentration of reactants


What three things provide evidence that organisms have changed over time?

Fossils Further evidence is derived from living organisms Bones


What are three things that are contaminated?

raw sewage, chemical pesticides and fertilizers