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Dalton viewed chemical change as the rearrangement of atoms to form new compounds, while the atoms themselves remained unchanged. This concept laid the foundation for the law of conservation of mass in chemical reactions.
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Why dissolution of NaCl in water is a physical change not a chemical change?
The dissolution of NaCl in water is a physical change because no new substances are formed. NaCl molecules are simply separated and surrounded by water molecules, creating a homogeneous solution. The process is reversible through evaporation, demonstrating that the chemical composition of the substances remains unchanged.
What are the differences between Dalton's model of the atom and Thompson's model of the atom?
Dalton's model viewed atoms as indivisible particles with unique mass, while Thompson's model proposed atoms as containing negatively charged electrons embedded within a positively charged sphere. Dalton's model did not account for subatomic particles, while Thompson's model introduced the concept of electrons as constituents of the atom.
Are evaporation and condensation opposite to each other?
Yes, evaporation is the process of liquid turning into gas due to heat, while condensation is the process of gas turning into liquid due to cooling. In this sense, evaporation and condensation can be viewed as opposite processes in terms of the direction of change (from liquid to gas and from gas to liquid, respectively).
Why can clotting be viewed as a cascade reaction?
Clotting can be viewed as a cascade reaction because it involves a series of enzymatic reactions that are triggered in a sequential manner, leading to the formation of a blood clot. Each step in the cascade amplifies the response and helps control the process, ensuring that only at the site of injury does a clot form.
What two visible evidence of reaction will you see when you acidify the NaHCO3 extract with HCl solution?
When you acidify the NaHCO3 extract with HCl solution, you will observe effervescence (bubbling) due to the release of CO2 gas. Additionally, you may observe a color change in the solution, indicating a chemical reaction taking place.
When a new substance is produced is it a chemical or physical change?
That's a chemical change because the structure of the atoms are changing. Chemical features can only be viewed through chemical change, by the way.
When a new substance is produced is it a physical or a chemical change?
That's a chemical change because the structure of the atoms are changing. Chemical features can only be viewed through chemical change, by the way.
Is a new substance is produced a chemical or a physical change?
That's a chemical change because the structure of the atoms are changing. Chemical features can only be viewed through chemical change, by the way.
Why dissolution of NaCl in water is a physical change not a chemical change?
The dissolution of NaCl in water is a physical change because no new substances are formed. NaCl molecules are simply separated and surrounded by water molecules, creating a homogeneous solution. The process is reversible through evaporation, demonstrating that the chemical composition of the substances remains unchanged.
How resutls are viewed?
Expectations change how results are viewed
What are the negatives of the practice?
Negative staining does not change the chemical structures within cells, it simply outlines the cell structure allowing the cell to be viewed easier.
How did the achievements of the explores change the way in which viewed their world?
how did the the achievements of those exploerers change the way in which people viewed their world
What occur when the expectation of a scientist change how the results of an experiment are viewed?
Bias occurs when scientists' expectations change how the results of an experiment are viewed.
How did the achievements of explorers change the way in which people viewed the world?
how did the the achievements of those exploerers change the way in which people viewed their world
What occurs when the expectation of a scientist change how the result of an experiment are viewed?
Bias occurs when scientists' expectations change how the results of an experiment are viewed.
How did achievements of those explorers change the way in which people viewed their world?
how did the the achievements of those exploerers change the way in which people viewed their world
Expectations that change how results are viewed?
Expectations influence how results are perceived by setting a standard against which outcomes are measured. Positive expectations can lead someone to interpret results more favorably, while negative expectations may cause a person to overlook positive aspects of the outcome. Our beliefs and mindset play a significant role in shaping how we view and interpret results.
