Answer:
<h3>The answer is 0.32 moles</h3>
Explanation:
To find the number of moles given the number of entities we use the formula
where n is the number of moles
N is the number of entities
L is the Avogadro's constant which is
6.02 × 10²³ entities
From the question
N = 1.93 × 10²³ particles
We have
We have the final answer as
<h3>0.32 moles</h3>
Hope this helps you
Answer:
The mol fraction of sucrose in an aqueous solution at 20°C is 0.114
Explanation:
Step 1: Data given
The vapor pressure of water above the solution is 2.0 mmHg
The vapor pressure of pure water at 20 °C is 17.5 mmHg
Step 2: Calculate the mol fraction of sucrose
Psolution = (χsolvent) (P°solvent)
⇒with Psolution = the vapor pressure of the solution is 2.0 mmHg
⇒with χsolvent = the mol fraction of sucrose = TO BE DETERMINED
⇒with P°solvent = the vapor pressure of pure water at 20 °C =17.5 mmHg
2.0 mmHg = X * 17.5 mmHg
X = 2.0 mmHg / 17.5 mmHg
X = 0.114
The mol fraction of sucrose in an aqueous solution at 20°C is 0.114
It depends on the weight and the high and the location of the object. I hop I helped. Have a great day
Answer:A) cotton
A fiber if available in trace or appropriate amount can link a suspect to a crime.Solubility is a preliminary test performed for identification of the type of fiber. In this method small amount of fiber evidence is dissolved in the suitable solvent to identify it's type. Some fibers completely get solublize in the solvent, some get partially soluble and other can only change their color or do not dissolve at all.
According to the given situation, the fiber dissolved in hydrochloric acid can be cotton. As the fibers of cotton are soft and slender and will get easily solubilize in hydrochloric acid.
It’s b make contact with the heat source
