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How do manufacturers decide which reactant to use in excess in a chemical reaction?
Wiki User
∙ 14y ago
The cheaper reagent is usually the reagent that is used in excess. This procedure is purely for economic reasons.
Wiki User
∙ 14y ago
Wiki User
∙ 10y agoThe cheaper Reactant
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How might a thermometer help you decide if there was any chemical change on mixing iron and charcoal?
For a chemical change to occur, there must be a chemical reaction. A chemical reaction would be either endothermic (uses energy, mostly heat), or exothermic (produces energy, again mostly heat). Any change in temperature of the reactants, as measured by a thermometer, will tell you not only ifa chemical reaction occurred, but also which kind of chemical reaction. No temperature change usually indicates that no reaction has occurred, a decrease in temperature would indicate an endothermic reaction, while an increase in temperature would indicate an exothermic reaction.
If you are trying to decide whether a chemical reaction does or does not take place when two substances are mixed what kind of evidence will you look for?
change of state change of colour fizzing/gas bubbles
What is the chemical formula of the compound made by combining calcium and oxygen Use Lewis structures to help you decide your answer?
CaO
What is meant by equilibrium condition in a reversible reaction?
What normally are called reactants form products. As more products are formed, in some reactions, they start undergoing the reverse reaction to reform the original reactants. The forward reaction has a certain rate(speed that it occurs) which slows asreactants are used up. The reverse reaction initially has zero rate because there are none of those substances to reverse the process but that reverse rate speeds up as more of those substances are formed. When both rates areEQUAL, the system is at chemical equilibrium.
What are seven physical properties used to identify unkown materials?
To identify a property, the first step you have to do is to decide which property you want to experiment with. Then, you test on a sample which is unknown. Finally, you compare and contrast the data with the known properties. :)Peace. :)
What does chemical reaction tell you?
A chemical equation is used in the means of writing out and describing a chemical reaction, such as the reactants and the substance that forms after the reaction (called the product)P.S: it took me a little to find out the question since i had it too. Some teachers decide to give out questions like these in attempt to get people to practice their research skills instead of just relying on a "magic book" for the answer.
How do you decide whether an observed property of matter is a chemical property?
If the property can be observed without changing the chemical composition of the substance, then it is a physical property. If the property can be observed only through a chemical reaction, then it is a chemical property.
How might a thermometer help you decide if there was any chemical change on mixing iron and charcoal?
For a chemical change to occur, there must be a chemical reaction. A chemical reaction would be either endothermic (uses energy, mostly heat), or exothermic (produces energy, again mostly heat). Any change in temperature of the reactants, as measured by a thermometer, will tell you not only ifa chemical reaction occurred, but also which kind of chemical reaction. No temperature change usually indicates that no reaction has occurred, a decrease in temperature would indicate an endothermic reaction, while an increase in temperature would indicate an exothermic reaction.
How do you decide whether an observed property of matter is a physical property?
If the property can be observed without changing the chemical composition of the substance, then it is a physical property. If the property can be observed only through a chemical reaction, then it is a chemical property.
How can you decide if a reaction is a Chemical reaction?
Chemical change is when the composition of your elements or solution change. In a simple way to say it, it's when you no longer have the same elements or solution that you started with. You can determine if a reaction is chemical, by observing the chemical properties. Usually it's when there's a color change, a new substance formed, etc.. On the other hand, physical change is when the composition of your substance stay the same, but the physical properties change. For example, liquid water evaporate into H2O gas.
If you are trying to decide whether a chemical reaction does or does not take place when two substances are mixed what kind of evidence will you look for?
change of state change of colour fizzing/gas bubbles
How could you decide whether the dissolving of sugar in water is a physical or chemical change?
You can evaporate the water and recover the sugar unchanged. A chemical change means a chemical reaction has taken place and changed the substance chemically. A physical change means that a solid has become a liquid such as dissolving sugar.
How do you decide which computer to purchase?
You can decide which computer to purchase by going to manufacturers' websites such as HP(Hewlett-Packard) or Dell and compare computers in their comparison pages.
When do chemical band form?
When the musicians meet and decide to form a band called the "Chemical Band".
Is there a way to decide whether a chemical is a gas or liquid just by looking at its physical properties?
If the property can be observed without changing the chemical composition of the substance, then it is a physical property. If the property can be observed only through a chemical reaction, then it is a chemical property.
How would you use manufacturers specifications for types of fasteners being used?
decide whats best fit for purpose
How can the periodic table be used to decide if a chemical is ionic or covalent?
you can tell because on which side it is on if it is on the left it is a chemical and on the right it is ironic
