The molality (m) of a solution is referred to as the measurement of the moles of solute divided by the solvent (either in liters or kilogram).
Mathematically;
[tex]\mathbf{Molality = \dfrac{\text{moles of solute}}{volume\ of \ solvent}}[/tex]
However, the mole fraction is the ratio of a particular substance molecule inside a mixture related to the overall number of moles of all the substances.
For a given mixture of C6H6 and CCl4
Their mole fraction can be expressed as:
[tex]X_{C6H6} = \dfrac{mole \ of \ C_6H_6}{mole \ of \ C_6H_6 + mole \ of \ CCl_4}[/tex]
[tex]X_{CCl_4} = \dfrac{mole \ of \ CCl_4}{mole \ of \ C_6H_6 + mole \ of \ CCl_4}[/tex]
where;
mole fraction of C6H6 = 0.7mole fraction of CCl4 = ???We know that:
[tex]\mathbf{X_{C6H6} + X_{CCl_4} = 1}[/tex]
[tex]\mathbf{ X_{CCl_4} = 1-X_{C6H6} }[/tex]
[tex]\mathbf{ X_{CCl_4} = 1-0.7}[/tex]
[tex]\mathbf{ X_{CCl_4} =0.3}[/tex]
∴
[tex]0.3 = \dfrac{mole \ of \ CCl_4}{mole \ of \ C_6H_6 + mole \ of \ CCl_4}[/tex]
where;
n represents the number of moles;
[tex]\mathbf{0.3 = \dfrac{n_{ CCl_4}}{n_{C_6H_6 }+ n_{ CCl_4}}}[/tex]
[tex]\mathbf{0.3n_{C_6H_6 }+ 0.3 n_{ CCl_4} = n_{ CCl_4}}[/tex]
[tex]\mathbf{0.3n_{C_6H_6 }= n_{ CCl_4}-0.3 n_{ CCl_4} }[/tex]
[tex]\mathbf{0.3n_{C_6H_6 }= 0.7n_{ CCl_4}}[/tex]
[tex]\mathbf{n_{C_6H_6 }=\dfrac{ 0.7}{0.3}n_{ CCl_4}---(1)}[/tex]
Assuming, we have 1 Liter of the solution;
Then,
the mass of the solution = 0.9 g/mol × 1000 mlmass of the solution = 900 gRecall that:
mass of the solution = mass of the solute + mass of the solvent
where;
mass of the solute = no of moles of [tex]\mathbf{n{CCl_4}}[/tex] × molar mass of [tex]\mathbf{n{CCl_4}}[/tex]
mass of the solvent = no of moles of [tex]\mathbf{n{C_6H_6}}[/tex] × molar mass of [tex]\mathbf{n{C_6H_6}}[/tex]
∴
900 g = ([tex]\mathbf{n{C_6H_6}}[/tex] × 78) + ([tex]\mathbf{n{CCl_4}}[/tex] × 154)
From equation (1);
[tex]\mathbf{n_{C_6H_6 }=\dfrac{ 0.7}{0.3}n_{ CCl_4}---(1)}[/tex]
replacing the value of [tex]\mathbf{n{C_6H_6}}[/tex] into 900 g = ([tex]\mathbf{n{C_6H_6}}[/tex] × 78) + ([tex]\mathbf{n{CCl_4}}[/tex] × 154); we have:
[tex]900 g = (\mathbf{\dfrac{ 0.7}{0.3}n_{ CCl_4}}\times 78) + ( n_{ CCl_4}}\times 154)[/tex]
[tex]900 g = (\mathbf{\dfrac{ 7}{3}n_{ CCl_4}\times 78) + ( n_{ CCl_4}}\times 154)}[/tex]
[tex]900 g = (\mathbf {7}\times n_{ CCl_4}\times 26) + ( n_{ CCl_4}}\times 154)}[/tex]
[tex]\mathbf{900 g = (\mathbf {182 +154)}n_{ CCl_4}}[/tex]
[tex]\mathbf{900 g = (\mathbf {336)}n_{ CCl_4}}[/tex]
[tex]\mathbf{n_{ CCl_4}=\dfrac{900 g}{336}}[/tex]
[tex]\mathbf{n_{ CCl_4}=2.679}[/tex]
From equation (1)
[tex]\mathbf{n_{C_6H_6 }=\dfrac{ 0.7}{0.3}n_{ CCl_4}}[/tex]
[tex]\mathbf{n_{C_6H_6 }=\dfrac{ 0.7}{0.3}\times 2.679}[/tex]
[tex]\mathbf{n_{C_6H_6 }=6.25}[/tex]
Finally, the molality of the solution is:
[tex]\mathbf{Molality = \dfrac{\text{moles of solute}}{volume\ of \ solvent}}[/tex]
[tex]\mathbf{Molality = \dfrac{\text{2.679}}{900}\times 1000}[/tex]
Molality = 2.976
Molality ≅ 3.0 m
Therefore, we can conclude that the molality of a solution prepared by mixing C6H6 with CCl4 is 3.0 m.
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Which assessment finding in a client who was admitted the previous day with a basilar skull fracture is most important to report to the health care provider
Answer:
his/her past health situation
Explanation:
in that way it can be easy to represent the cause of the certain illness
Temperature of 101.5° F (38.6° C) most important to report to the health care provider in a client who was admitted the previous day with a basilar skull fracture.
What is basilar skull fracture?A traumatic head injury known as a basilar skull fracture, also known as a skull base fracture, involves a break in at least one of the bones at the base of the skull. The cranial cavity's floor is formed by the base of the skull, which is a sophisticated structure that separates the brain from the head and neck.Because meningitis is a possibility in patients with basilar skull fractures, the doctor should be informed of the increased body temperature.Patients with basilar skull fractures are more likely to develop meningitis because there may be direct contact between microorganisms in the middle ear, nasopharynx, or paranasal sinuses and the central nervous system (CNS). Leakage of cerebrospinal fluid (CSF) has been linked to a higher chance of developing meningitis.
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what effect does the ARV have on the red blood cells
Answer:
HIV may affect erythropoiesis directly through infection of red cell precursors and bone marrow stromal cells.
A patient is to take 2 2/3 tablespoons of medicine per day in 3 equally divided doses. How much medicine is to be taken in each dose
Answer:
24656hghh
Explanation:
rvchxhbjytytgyyugh
What are the priority nursing actions you would anticipate implementing when caring for Mr. Jones and why
Answer:
At first i could see the patient's diagnosis so that i could know what is the disease condition of patient and why is he been admittedi will take a past and present history ( how many year has been patient is affected from disease condition, does he/she smoke ,drink :if yes then i could lije to do counseling )suggest them to take medicine in proper time i could see the list of medication prescribed bt doctor if any medication is not present then i could suggest them to bring itTime to time analysing the patientif there is any problem and i could not know then i should immediately inform the staff sister or my seniorThese are medicines that are often used to thin the mucus secretion in the nasal passages. a) decongestants b) radioactive isotopes c) expectorants d) antibiotics and anti-inflammatories
What must be supplied at salad bars to prevent customers from contaminating the food?
A. Plastic forks
B. Serving tongs
C. Hand sanitizer
D. Sanitizing wipes
Answer: 4
Explanation:
Why do you think it is important to be information literate.
How do you typically get the information you need?
Answer:
It is important to be information literate......because it helps to know about the situation, conditions of a particular field.
I get information through radio , television, the internet, family, friends, relatives. etc. ..
Explanation:
1. Explain why you agree or disagree that HPV should be mandatory for both Male and female teenagers.
Answer:
Agree because
Explanation:
HPV vaccination is cancer prevention. HPV is estimated to cause nearly 36,000 cases of cancer in men and women every year in the United States. HPV vaccination can prevent more than 32,000 of these cancers from ever developing by preventing the infections that cause those cancers.
Time management is a crucial part of being a successful student and a successful medical assistant. What are some methods Shawna can implement to help her manage her time as effectively as possible?
Answer:
BY PLANNING HER DAILY ROUTINE
Explanation:
One of the methods that Shawna can implement to help her manage her time effectively is the planning and prioritizing method. This will help her attend the important and the urgent tasks in her studies first to avoid late submission of assignmen
In the term amylase, the suffix -ase means
Question 6 options:
a) pertaining to.
b) enzyme.
c) condition of.
d) starch.
Answer:
the suffix ase is a suffix that denotes an enzyme.its used in biochemistry to form names of enzymes.it is also used to determine particular names of enzymes that catalyse a specific reaction.
I hope this helps
Answer:B
Explanation:im not sure
Please put the following symptoms of the common cold in the order in which they usually appear. Runny nose, itchy throat, cough, chest congestion
Answer:
runny nose
itchy throat
cough
chest congestion
Please put the following symptoms of the common cold in the order in which they usually appear. Runny nose, itchy throat, cough, chest congestion
Ms. Jones has lab results that indicate as normally low levels of blood calcium. Which gland might be involved? Which hormone is lacking in this condition
Hi,
Answer:
Ms. Jones has lab results that indicate as normally low levels of blood calcium. Which gland might be involved? Which hormone is lacking in this condition
- the tyroid gland
- parathyroid hormone
In the term myoparesis the suffix- paresis means what
Which of the following is an example of a national-level professional organization for a pharmacy technician?
O A. American Association of Pharmacy Technicians
O B. The pharmacy board of a local state hospital
O C. Local CDC branches
O D. American Association for Safe Medication
A national-level professional organization for a pharmacy technician is A. American Association of Pharmacy Technicians.
The answer is option A.
What is a national-level professional organization for a pharmacy technician?NPTA is the arena's biggest expert organization for pharmacy technicians. Its assignment is to increase the fee of pharmacy techs and to help them meet their non-public and professional dreams.pharmacy technician IIIA pharmacy technician III is commonly the very best degree of certification within the career path and requires more enjoyment and schooling.There are two number one businesses that provide pharmacy tech certification; the pharmacy Technician Certification Board (percent) and the countrywide Healthcareer affiliation (NHA). Both are licensed through the national commission for Certifying corporations (NCCA) and are identified in all 50 states.
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List a few principles you would like to cultivate and describe your plan of action for cultivating them.
I love statistics So I will use The principles of it
[tex] \begin{cases}\\ \dag \: \underline{\Large\bf Formulas\:of\:Statistics} \\ \\ \bigstar \: \underline{\rm Mean:} \\ \\ \bullet\sf M=\dfrac {\Sigma x}{n} \\ \bullet\sf M=a+\dfrac {\Sigma fy}{\Sigma f} \\ \\ \bullet\sf M=A +\dfrac {\Sigma fy^i}{\Sigma f}\times c \\ \\ \bigstar \: \underline{\rm Median :} \\ \\ \bullet\sf M_d=\dfrac {n+1}{2} \:\left[\because n\:is\:odd\:number\right] \\ \bullet\sf M_d=\dfrac {1}{2}\left (\dfrac {n}{2}+\dfrac {n}{2}+1\right)\:\left[\because n\:is\:even\:number\right] \\ \\ \bullet\sf M_d=l+\dfrac {m-c}{f}\times i \\ \\ \bigstar \: {\boxed{\sf M_0=3M_d-2M}}\end {cases}[/tex]
Answer:
• Algebraic expression is formed from variables and constants using
different operations.
• Expressions are made up of terms.
• A term is the product of factors. Factors may be numerical as well as
algebraic (literal).
• Coefficient is the numerical factor in a term. Sometimes, any factor
in a term is called the coefficient of the remaining part of the term.
• The terms having the same algebraic factors are called like terms.
• The terms having different algebraic factors are called unlike terms.
• Expression with one term is called a 'Monomial’.
• Expression with two unlike terms is called a 'Binomial’.
• Expression with three unlike terms is called a 'Trinomial’.
• In general, an expression with one or more than one term (with non-
negative integral exponents of the variables) is called a ‘Polynomial’.
• The sum (or difference) of two like terms is a like term with coefficient
equal to the sum (or difference) of coefficients of the two like terms.
