Answer:
B) an error occurred, the mass of the reactants should equal the mass of the products.
Explanation:
The answer choices are:
A) no error occurred, some of the products are always lost as heat.
B) an error occurred, the mass of the reactants should equal the mass of the products.
C) an error occurred, the products should weigh more than the reactants.
D) no error occurred, water is not weighed when determining the weight of the products.
Solution
The basis to answer this question is the law of conservation of mass.
Any chemical reaction satisfies the law of conservation of mass: mass cannot be either created nor destroyed, so, always, the mass of the reactants equal the mass of the products.
Thus, since he measured the mass of his reactant materials to be 35g and he reported that his products weighed 32g, his data are in clear contradiction of the law of conservation of mass. So, there is an error in his results: the mass of the reactants should equal the mass of the products.
Answer:
Option (B)
Explanation:
Geothermal energy refers to the heat energy that is stored in the interior of the earth, and is primarily used to generate electricity. The geothermal energy increases with the increasing depth.
This energy is not that resourceful in a broad picture. It is because in order to extract this energy, the drilling and excavations must be made. And it is a very expensive process as it is very difficult to carry out the entire process.
Due to this drawback, it is much less resourceful.
Thus, the correct answer is option (B).
Answer:
true because her muscles are working and theres movement being done overall in the image.
Explanation:
President Obama suggested that "<em>there’s only one way to solve these challenges, and that is to do it together.”</em>
This goes to say that the only way in which problems can be solved is by working together
<h3>What is government?</h3>
Government can be defined as that group of people with the authority to govern a country or state.
So therefore, President Obama suggested that "<em>there’s only one way to solve these challenges, and that is to do it together</em>.”
Learn more about government:
brainly.com/question/18464634
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Answer:
Conjugation differ from reproduction because Conjugation transfer DNA horizontally to cells in the same generation.
Explanation:
Conjugation is a process of transfer of genetic material from one organism to another organism to direct contact.
An organism serve as the donor and transfer to another organism which is the receiver.
The donor carry DNA sequence called fertility factor. It transfer DNA horizontally to cells in the same generation. It is a type of genetic recombination that occur between two organisms.
Conjugation normally occur in bacteria.
