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in order for reactants to be changed into products, there needs to be a chemical change.
Waldo Mayer
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What has to happen for a chemical change to happen?
At least 2 of the reactants must change their chemical formula.
What if the total mass of the product in a chemical reaction is 14grams what must the combined masses of the reactants be?
The mass of reactants is equal to the mass of products.
If the total mass of the product in this chemical reaction is 14g what must the combined masses of the reactants be?
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What must happen in order for the law of conservation of matter to be followed during the chemical process?
The mass of reactants must be equal to the mass of products.
What 3 things need to happen in order for a chemical reaction to occur?
This isn't answerable without knowing what the chemical reaction is. Some reactions are very easy to initiate - alkali metals and halogens will react with little to no prodding. Others require intermediate reactions.
What number cannot be changed in a chemical equation?
You cannot change the subscripts in the molecular identities.For example, H2SO4 must remain H2SO4 and not changed to something like H3SO7.Furthermore, the total mass of the reactants must equal the total mass of the products.
what are characteristics of chemical equation?
All chemical reactions have a common structure. It must have reactants, that are the substances that you have at the beginning, and the product that are the new substances you get at the end.
The correct terms for the two sides of a chemical equation?
given the law of conservation of mass, we now know that the mass of the reactants must equal the mass of the product.
Why an experiment must have control?
An experiment must have a control to show what would happen if no factors were changed.
How does mass of the reactants compare with the mass of the products?
The Law of Conservation of Mass applies. The total mass of all the reactants MUST equal the total mass of all the products, The individual comoounds may vary. e,g, A + B = C + D 25 g (A) + 30g (B) = 55 g of reactants. So the total mass of the products MUST equal 55 g. However, product (C) may have a mass of 40g , then product (D) MUST equal 15 g Hence 40 g + 15 g = 55 g,
What are the characteristics of chemical equations?
All chemical reactions have a common structure. It must have reactants, that are the substances that you have at the beginning, and the product that are the new substances you get at the end.
What must happen to reactant particles for a reaction to take place?
In order for two molecules to react they must: 1) Have sufficient energy to overcome whatever kinetic barrier exists to form a product in a realistic time period. We call this the activation energy. 2) Form a product which is at a lower total energy state than the two initial molecules.
