When a substance changes its state, all BUT ONE of these statements istA)
Mass remains constant.
B)
Only the form changes.
Kinetic energy changes.
D)
Something chemically new is formed.
Science
Answers
Answer:
"Something chemically new forms" is the incorrrect statement
Explanation:
When a substance changes its state, it retains its mass even though its form and kinetic energy changes. It is simply moving between states, that is: loosing energy or gaining it. its chemical composition does not change.
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Answer:
Science...Only the form changes.Kinetic energy changes.
Explanation:
SCIENCE
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b. results in "smokers breath."
c. can lead to premature aging.
Answers
So A is the answer.
Smoking marijuana can be as unhealthy as smoking cigarettes and can cause cancer.
a. can cause cancer.
Smoking marijuana can be as unhealthy as smoking cigarettes, and it can cause cancer. Marijuana smoke contains many of the same harmful chemicals as cigarette smoke, including tar, carbon monoxide, and carcinogens. These chemicals can damage DNA and lead to the development of cancer.
In addition to cancer, smoking marijuana can also lead to other health problems, such as respiratory problems, heart disease, and lung infections. It can also impair cognitive function and increase the risk of accidents.
The other options, b. results in "smokers breath" and c. can lead to premature aging, are also possible effects of smoking marijuana, but they are not as serious as cancer.
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(2) C3H8(g) + 5 O2(g)--> 3 CO2(g) + 4 H2O(l)
(3) Zn(s) + 2 HCl(aq)--> ZnCl2(aq) + H2(g)
(4) BaCl2(aq) + Na2SO4(aq) --> BaSO4(s) + 2 NaCl(aq)
Answers
Answer : The correct option is, (1)
Explanation :
According to the Arrhenius acid-base concept,
Arrhenius acid is a species that produces ion in an aqueous solution and Arrhenius base is a species that produces
ion in an aqueous solution.
From the given options, option 1 chemical equation represents the reaction of an Arrhenius acid and an Arrhenius base. In this reaction, produces
ion in an aqueous solution and act as an Arrhenius acid,
produces
ion in an aqueous solution and act as an Arrhenius base.
While the other options does not represents the reaction of an Arrhenius acid and an Arrhenius base.
Reaction 2 is an example of combustion reaction.
Reaction 3 is an example of single-displacement reaction.
Reaction 4 is an example of double-displacement reaction.
Hence, the correct option is, (1)
Answers
Answers
Answer:
The correct answer is option C.
Explanation:
The radioisotopes in the Earth's interior are not in pure form and exhibit various entrenched impurities and are interspersed. Thus, when a neutron is discharged by a decaying atom, its occurrences of hitting another atom of radioisotope in order to continue the chain reaction becomes lower in comparison to the man-made nuclear reactor. In this manner, the radioactive chain reaction in the interior of the Earth is not well-sustained.
Answer: C
Explanation:
Atoms that undergo fission aren’t concentrated enough to sustain a chain reaction.
Answers
Option A. salt flat is the correct answer. A halophile is most likely to be found in a salt flat, as it aligns with the habitat where halophiles are most commonly found due to their ability to thrive in high-salinity conditions.
Halophiles are organisms that thrive in environments with high salt concentrations. Salt flats, also known as salt pans or salt deserts, are large expanses of flat land covered with salt and other minerals. These areas typically form in arid or semi-arid regions where water evaporates, leaving behind concentrated salt deposits.
Salt flats are characterized by their stark, white appearance due to the accumulation of salt crystals on the surface. The high salt content makes these areas inhospitable to many other forms of life, but halophiles have evolved unique mechanisms to tolerate and even benefit from the high salt concentrations.
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Final answer:
A halophile can be found in salt flats, ocean floors, swamps or marshes, and hydrothermal vents.
Explanation:
Halophiles are organisms that can be found in highly saline environments. They have adapted to survive in areas with high salt concentrations. Some of the locations where halophiles can be found include:
- Salt flats: These are areas where water evaporates, leaving behind a high concentration of salt. Halophiles are able to survive in these extreme conditions.
- Ocean floors: Certain areas of the ocean, such as saltwater lakes or lagoons, have high salt concentrations. Halophiles have adapted to live in these environments.
- Swamps or marshes: These areas may have high salt content due to the presence of saltwater or brackish water. Halophiles can thrive in these habitats.
- Hydrothermal vents: These are underwater geysers that release hot, mineral-rich water. Some hydrothermal vents have high salt concentrations, providing a suitable habitat for halophiles.
Halophiles have unique mechanisms to cope with the osmotic stress caused by the high salt content. They may have specialized enzymes and transport proteins that allow them to maintain proper cellular function in these extreme conditions.
Halophiles play an important role in the ecosystem by contributing to nutrient cycling and serving as a food source for other organisms.
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2. ionic, because the valance electrons are mobile
3. metallic, because the valance electrons are stationary
4. metallic, because the valance electrons are mobile
Answers
A solid substance is an excellent conductor of electricity. the chemical bonds in this substances are most likely metallic, because the valance electrons are mobile. Therefore the correct option is option D.
What is metallic bonding?
Metallic bonding is a type of chemical bonding that rises from the electrostatic attractive force between conduction electrons and positively charged metal ions.
If a solid substance is able to conduct electricity then the chemical bond in the substance will definitely be metallic bond. The reason for excellent conductor of electricity is the mobility of the valence electrons. In metallic bonds valence electrons are mobile.
Therefore the correct option is option D that is metallic, because the valance electrons are mobile.
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Answer;
-4. metallic, because the valance electrons are mobile
Explanation;
-Electrical conductivity in metals is a result of the movement of electrically charged particles.The atoms of metal elements are characterized by the presence of valence electrons (electrons in the outer shell of an atom) that are free to move about.
-Therefore; Metallic elements such as sodium and potassium conducts electricity in solid form due to the presence of delocalized valence electrons. These electrons can move freely within the structure of a metal when an electric current is applied.