The term 'activation energy' refers to the energy required to start a reaction.
In the context of chemical reactions, what does the term 'activation energy' refer to?(1 point)
Responses
The total energy released by the reaction
The total energy released by the reaction
The energy required to start a reaction
The energy required to start a reaction
The energy stored in the products
The energy stored in the products
The energy stored in the reactants
5 answers
You are performing a chemical reaction. The mass of reactant 1 is 24 grams. The mass of reactant 2 is 39 grams. The reaction forms a solid and a gas. The mass of the solid is 44 grams. What is the mass of the gas?(1 point)
Responses
5
5
33
33
0
0
19
Responses
5
5
33
33
0
0
19
To find the mass of the gas produced in the reaction, we can apply the law of conservation of mass, which states that the total mass of reactants must equal the total mass of products.
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Calculate the total mass of the reactants: \[ \text{Mass of reactant 1} + \text{Mass of reactant 2} = 24 , \text{g} + 39 , \text{g} = 63 , \text{g} \]
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Calculate the total mass of the products (solid and gas): Let the mass of the gas be \( x \). \[ \text{Mass of solid} + \text{Mass of gas} = 44 , \text{g} + x \]
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Set the total mass of reactants equal to the total mass of products: \[ 63 , \text{g} = 44 , \text{g} + x \]
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Solve for \( x \): \[ x = 63 , \text{g} - 44 , \text{g} = 19 , \text{g} \]
Therefore, the mass of the gas produced is 19 grams.
If a company claims that its product has been proven scientifically, which of the following should have taken place if the results are to be considered reliable?(1 point)
Responses
The company should have held discussions with leading industry scientists.
The company should have held discussions with leading industry scientists.
Technology should have been used in both the gathering of data and data analysis.
Technology should have been used in both the gathering of data and data analysis.
Results should have been peer reviewed and repeated producing the same findings.
Results should have been peer reviewed and repeated producing the same findings.
The results of the investigation should have been published in popular magazines.
Responses
The company should have held discussions with leading industry scientists.
The company should have held discussions with leading industry scientists.
Technology should have been used in both the gathering of data and data analysis.
Technology should have been used in both the gathering of data and data analysis.
Results should have been peer reviewed and repeated producing the same findings.
Results should have been peer reviewed and repeated producing the same findings.
The results of the investigation should have been published in popular magazines.
If the results are to be considered reliable, the results should have been peer reviewed and repeated producing the same findings.
1 answer