Question

1. Lab Investigator: Chemical Reactions cannot be used for

Answer 1

1. The chemical reactions cannot be used for $\boxed{{\text{viewing any chemical reaction in the laboratory}}{\text{.}}}$  

2. Magnesium is ${\text{dangerous to look at when it burns and}} \hfill\ {\text{used in photography, fireworks, and flares}} \hfill \ }$.

The result of a chemical reaction is a  $\boxed{{\text{product}}}$.

Further explanation:

1. A chemical reaction involves a combination of two or more substances known as reactants that combine together in fixed ratio and form products on the completion of the reaction. The criteria for determining a chemical reaction is that it must involve either one of the following changes.

1. A change in the state of the matter when going from reactants to the products side.

2. A change in the color.

3. A change in the reaction temperature.

4.The evolution of some gas at the end of the reaction.

2. A chemical reaction is often described in terms of a simplified equation known as the chemical equation. This represents all the reactants involved and the reaction conditions that lead to a particular product. For example, the reaction of magnesium $\left( {{\mathbf{Mg}}} \right)$ with air $\left( {{\mathbf{MgO}}} \right)$ can be represented by the chemical equation as follows:

 $\begin{aligned}{\text{Mg}} + {{\text{O}}_{\text{2}}}\to {\text{MgO}} \hfill\\{\text{Reactants product}} \hfill\\\end{aligned}$

The reactions that are accompanied by the liberation of an enormous amount of heat is termed as exothermic reactions. The combustion of magnesium is a highly exothermic reaction and magnesium burns with an intense dazzling flame. Hence it is advised not to directly look at the burning magnesium.

3. The reaction occurs in accordance with the law of conservation of mass that states that total mass of the reactant combining must be equal to the products formed. Hence every chemical equation obeys the law of conservation of mass and must be balanced. The balanced chemical equation reveals the amount of each reactant that combines to form a particular product. Therefore a balanced chemical equation does provide a lot of quantitative data regarding the number of molecules of the reactant combining along with the nature and kind of a chemical reaction.

Learn more:

1. Effectiveness of detergent: brainly.com/question/10136601

2. Scientific notation: brainly.com/question/4935921

Answer details:

Grade: High school

Subject: Chemistry

Chapter: Chemical reactions and equations.

Keywords: Law of conservation of mass, chemical reaction, state of the matter, reaction conditions, balanced chemical equation, reactants, product and exothermic.

Answer 2

1: viewing any chemical reaction in a laboratory

2: dangerous to look at when it burns & used in photography, fireworks, and flares

3: the product