Answer:
in a conical flask. Describe how the volume of sodium hydroxide solution needed to react completely with the weak acids in 25cm cubed of this champagne can be found by titration, using phenolphthalein indicator.
Answer:
Cancer is a disease caused when cells divide uncontrollably and spread into surrounding tissues.
Explanation: Cancer is caused by changes to DNA. Most cancer-causing DNA changes occur in sections of DNA called genes. These changes are also called genetic changes.
-Hope this helped
<u>Answer:</u> The given sample of water is not safe for drinking.
<u>Explanation:</u>
We are given:
Concentration of fluorine in water recommended = 4.00 ppm
ppm is the amount of solute (in milligrams) present in kilogram of a solvent. It is also known as parts-per million.
To calculate the ppm of fluorine in water, we use the equation:

Both the masses are in grams.
We are given:
Mass of fluorine =
(Conversion factor: 1 g = 1000 mg)
Mass of water = 5.00 g
Putting values in above equation, we get:

As, the calculated concentration is greater than the recommended concentration. So, the given sample of water is not safe for drinking.
Hence, the given sample of water is not safe for drinking.
Answer: Option (A) is the correct answer.
Explanation:
According to the Gibb's free energy conditions:
If
< 0, then reaction is spontaneous.
If
> 0, then reaction is non-spontaneous.
If
= 0, then reaction is equilibrium.
Since, the given reaction is
. It denotes that liquid state of fluorine is changing into gaseous state. And, the boiling point of fluorine is very low.
Therefore, at low and high temperature fluorine is a gas. Hence, the reaction is spontaneous in nature.
Thus, we can conclude that the statement at low temperature, the reaction is spontaneous and
< 0 and at high temperature, the reaction is spontaneous and
< 0, is correct.
Well, human bodies differ from all those animals.