(A) Color changes from reactant to products.
The rate of a chemical reaction is calculated by dividing the rate of change in a reactant or product's concentration by the coefficient from the equation's balanced state.
2N2O5(g) → 4NO2(G) + O2(g)
A change in color and the appearance of bubbles are two indications of a chemical shift.In a chemical process, the makeup of the components changes; in a physical change, the appearance, smell, or straightforward exhibition of a sample of matter changes without changing its composition.
Despite the fact that we refer to them as physical "reactions," nothing is actually changing. A change in the substance in question's elemental composition is necessary for a reaction to occur. Therefore, from now on, we will simply refer to bodily "reactions" as physical changes.
Physical modifications must only cause a variation in display without altering the composition. Typical modifications include, but are not limited to:
Texture\Color\Temperature\Shape
learn more about Chemical reactions: brainly.com/question/16416932
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Explanation:
The two isotopes of lithium given are similar in the sense that they have the same atomic number which is 3.
Every kind of an atom of an element have the same atomic number. Atomic number is the number of protons in an atom.
The atoms are different in that they have different mass number because the number of protons they contain are different.
So for isotopes;
- They have the same electronic configuration
- They have similar chemical properties
- But their masses differs
- Their abundance in nature also differs.
8.97998 hope this helps! BRAINLIEST???
Salt will be less soluble in water if the "temperature is decreased". The kinetic energy brought about by temperature increases as the temperature increases. Because of these increase in kinetic energy, solvent molecules (water molecules) tend to break apart effectively the solute molecules (salt molecules).
Answer:
The answer is "4,241 .17 years"
Explanation:
The disintegration rate, which shows in C-14 atoms = ![15.3 \frac{atoms}{min-g}](https://tex.z-dn.net/?f=15.3%20%5Cfrac%7Batoms%7D%7Bmin-g%7D)
Rate of sample disintegration =![9.16 \frac{atoms} {min-gram}](https://tex.z-dn.net/?f=9.16%20%5Cfrac%7Batoms%7D%20%7Bmin-gram%7D)
The digit proportion of C-14 can be determined that is included in the sample ![= \frac {9.16}{15.3} \\\\ = 0.5987](https://tex.z-dn.net/?f=%3D%20%5Cfrac%20%7B9.16%7D%7B15.3%7D%20%5C%5C%5C%5C%20%3D%200.5987)
5730 years from half-life.
The number with half-lives (n) which are repelled must be determined:
![(\frac{1}{2})^n= A\\\\A= fraction of C-14, which is remaining \\\\(\frac{1}{2})^n= 0.5987 \\\\ n \log 2 = - \log 0.5987\\\\](https://tex.z-dn.net/?f=%28%5Cfrac%7B1%7D%7B2%7D%29%5En%3D%20A%5C%5C%5C%5CA%3D%20%20fraction%20of%20C-14%2C%20which%20is%20remaining%20%5C%5C%5C%5C%28%5Cfrac%7B1%7D%7B2%7D%29%5En%3D%200.5987%20%5C%5C%5C%5C%20n%20%5Clog%202%20%3D%20-%20%5Clog%200.5987%5C%5C%5C%5C)
![\therefore \\\\ \Rightarrow n= \frac{0.227}{0.3010} \\\\ = 0.740\\](https://tex.z-dn.net/?f=%5Ctherefore%20%5C%5C%5C%5C%20%5CRightarrow%20n%3D%20%5Cfrac%7B0.227%7D%7B0.3010%7D%20%5C%5C%5C%5C%20%20%3D%200.740%5C%5C)
So, the age of the sample is given by = ![n \times\ half-life](https://tex.z-dn.net/?f=n%20%5Ctimes%5C%20half-life)
![= 0.740 \times 5730 \ years \\\\=4241.17 \ years\\\\](https://tex.z-dn.net/?f=%3D%200.740%20%5Ctimes%205730%20%5C%20years%20%5C%5C%5C%5C%3D4241.17%20%5C%20years%5C%5C%5C%5C)