Answer:
Water acts as a solvent of carbon dioxide excreted from tissues, in blood and helps in regulating pH (because it forms carbonic acid that lowers pH when it tends to get higher). Blood pH should be maintained at about 7.4. One major reason is that the structure of protein is dependent ton pH because pH determines its ionization hence also affecting the charges and interaction between side groups of amino acids. A change in pH may, therefore, denature proteins and negatively affect cellular functions.
Explanation:
To get more on how water acts as a universal solvent check out brainly.com/question/7007192
The given reaction is A---> products
Trial-1: The initial concentration of A is 0.10 M when the initial rate is 0.015 M/s
Trial-2: The initial concentration of A is 0.40 M when the initial rate is 0.060 M/s
Let the order be m
Rate law for first trial will be: ![0.015M/s = k.[0.10M]^{m}](https://tex.z-dn.net/?f=0.015M%2Fs%20%3D%20k.%5B0.10M%5D%5E%7Bm%7D)
Rate law for second trial will be: ![0.060M/s = k.[0.40M]^{m}](https://tex.z-dn.net/?f=0.060M%2Fs%20%3D%20k.%5B0.40M%5D%5E%7Bm%7D)
Rate- 2/ Rate-1 : ![\frac{0.060M/s}{0.0150M/s}=\frac{k(0.40)^{m}}{k.(0.10)^{m}}](https://tex.z-dn.net/?f=%5Cfrac%7B0.060M%2Fs%7D%7B0.0150M%2Fs%7D%3D%5Cfrac%7Bk%280.40%29%5E%7Bm%7D%7D%7Bk.%280.10%29%5E%7Bm%7D%7D)
![4 = 4^{m}](https://tex.z-dn.net/?f=4%20%3D%204%5E%7Bm%7D)
So, m = 1
Therefore the order of the reaction is 1
Taking into account the definition of density, the density of the sample is 0.5
.
It is necessary yo know that density is defined as the property that matter, whether solid, liquid or gas, has to compress into a given space.
In other words, density allows you to measure the amount of mass in a certain volume of a substance.
Then, the expression for the calculation of density is the quotient between the mass of a body and the volume it occupies:
![density=\frac{mass}{volume}](https://tex.z-dn.net/?f=density%3D%5Cfrac%7Bmass%7D%7Bvolume%7D)
In this case, you know:
Then, replacing in the definition of density:
![density=\frac{6 g}{12 mL}](https://tex.z-dn.net/?f=density%3D%5Cfrac%7B6%20g%7D%7B12%20mL%7D)
Solving:
<u><em>density= 0.5 </em></u>
<u><em /></u>
Finally, the density of the sample is 0.5
.
Learn more about density:
Substances are chemically combined and cannot be separated by normal physical means. Mixtures, however, are simply physically combined and can be separated into their component parts.