0
What else can I help you with?
Why dissolution of NaCl in water is a physical change not a chemical change?
It has been argued whether this is a chemical or physical change. It can be viewed as a chemical change since the Na ion and Cl ion are separated from the crystal lattice, and then become hydrated by water molecules, thus changing the actual chemical structure. However, this is a REVERSIBLE chemical change. Thus, if you evaporate the water, you end up with the same crystalline structure (lattice) that you began with, and so it may now be viewed as simply a physical change. There is no consensus as to which is correct, IMHO.
What are the differences between Dalton's model of the atom and Thompson's model of the atom?
Dalton never acknowledged the fact that the atomic structure consisted of protons nor electrons. Dalton's theory suggested:unlike Thomson who came up with the theory of the 'Plum Pudding Model', which consisted of a positive proton with electrons 'scattered' through it, like "...currants in a Christmas pudding..."hope this was somewhat helpful :)Matter is made up of indivisible atoms.All atoms of an element are identical.Atoms are neither created nor destroyed.Atoms of different elements have different weights and chemical properties.Atoms of different elements combine in simple whole numbers to form compounds.
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?
In the reaction between sodium bicarbonate and hydrochloric acid, one result of the reaction will be carbon dioxide bubbling out of solution. Also sodium chloride can be viewed falling in the solution.
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.
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.
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.
Why dissolution of NaCl in water is a physical change not a chemical change?
It has been argued whether this is a chemical or physical change. It can be viewed as a chemical change since the Na ion and Cl ion are separated from the crystal lattice, and then become hydrated by water molecules, thus changing the actual chemical structure. However, this is a REVERSIBLE chemical change. Thus, if you evaporate the water, you end up with the same crystalline structure (lattice) that you began with, and so it may now be viewed as simply a physical change. There is no consensus as to which is correct, IMHO.
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
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.
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 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
What are the differences between how Democritus and Dalton described atoms?
Democritus, a pre-Socratic philosopher, proposed that atoms are indivisible and eternal particles that make up all matter, emphasizing their qualitative differences based on shape and size. In contrast, John Dalton, in the early 19th century, formulated a more scientific atomic theory, asserting that atoms are indivisible spheres and that each element consists of identical atoms with a specific mass. Dalton also introduced the concept of chemical compounds formed by combinations of different atoms, laying the groundwork for modern chemistry. While both viewed atoms as fundamental units of matter, Dalton's model was more systematic and aligned with empirical evidence.
