Answer: We can use Raoult's Law to solve for the molar mass of the solute:
ΔP = P°_solvent x mole fraction of solute x vapor pressure of solute
Since the solute is nonvolatile, its vapor pressure is negligible and we can assume that it is equal to zero. Thus, we can simplify the equation to:
ΔP = P°_solvent x mole fraction of solute
Solving for the mole fraction of solute:
ΔP / P°_solvent = mole fraction of solute
Plugging in the values:
(23.7 torr - 22 torr) / 23.7 torr = mole fraction of solute
mole fraction of solute = 0.072
Now we can use the mole fraction of solute to calculate the moles of solute dissolved in the solution:
moles of solute = mole fraction of solute x moles of solvent
moles of solvent = (25 mL / 1000 mL) x (1 g/mL) / (18.015 g/mol) = 0.001385 mol
moles of solute = 0.072 x 0.001385 mol = 0.0001 mol
Finally, we can calculate the molar mass of the solute:
molar mass of solute = mass of solute / moles of solute
mass of solute = 1.02 g
molar mass of solute = 1.02 g / 0.0001 mol = 102 g/mol
Therefore, the molar mass of the solute is 102 g/mol.
Brainiest is Appreciated.
b) The beach in Antibes, France, is composed of small, smooth rocks that have been worn
down by being tumbled against each other by the energy of the sea water
Physical or chemical?
Specific type of physical or chemical:
Answer: A
Explanation: red eye
What is the molar mass of argon gas (AN = 18)?
Answer:
molar mass = 79.90 g/mol
Explanation:
Argon as a gas is Ar₂. Molar mass, as found on a standard IUPAC Periodic table, located on most high school chemistry and physics textbooks, as well as data sheets in examinations, is 2×39.95 = 79.90 g/mol.
Which statement about fossil fuels is true?
_____________________________________
(any wrong/spams answers will be reported)
_____________________________________
(A) They are found deep within the earth.
(B) They do not cause pollution.
(C) They are renewable.
Explanation:
• they are found deep within earth
Answer:
A
Explanation:
fossil fuels are remains of dead plants and animals. so, they are found underground
calculate the mass of magnesium needed to produce 72mL of hydrogen gas at a pressure of 755mmHg and a temperature of 20 celsius
A 32.0 L cylinder containing helium gas at a pressure of 38.5 atm is used to fill a weather balloon in order to lift equipment into the stratosphere. What is the final pressure (in atm) in the cylinder after a 355 L balloon is filled to a pressure of 1.20 atm.
Answer:
Explanation:
We can use Boyle's Law, which states that the product of pressure and volume is constant for a fixed amount of gas at a constant temperature. We can use this law to find the final pressure in the cylinder after filling the balloon.
The initial pressure and volume of the helium gas in the cylinder are:
P1 = 38.5 atm
V1 = 32.0 L
The final volume of the gas after filling the balloon is:
V2 = 355 L
Using Boyle's Law, we can write:
P1V1 = P2V2
where P2 is the final pressure in the cylinder.
Solving for P2, we get:
P2 = (P1V1) / V2
Plugging in the values, we get:
P2 = (38.5 atm x 32.0 L) / 355 L
P2 = 3.48 atm
Therefore, the final pressure in the cylinder after filling the balloon is 3.48 atm.
urea, chemical formula (NH2)2CO, is used for fertilizer and many other things. calculate the number of N, C, O, and H atoms in 1.78*10^4g of urea.
A sample of the compound has 9 grams of cobalt. How many grams of fluorine does the sample have?
The mass (in grams) of fluorine the sample have is 2.91 g
How do I determine the mass of fluorine?First, we shall determine the mole of 9 grams of cobalt. Details below:
Mass of cobalt = 9 grams Molar mass of cobalt = 58.93 g/mol Mole of cobalt =?Mole = mass / molar mass
Mole of cobalt = 9 / 58.93
Mole of cobalt = 0.153 mole
Finally, we shall determine the mass of fluorine the present in the compound. Details below:
Molar mass of fluorine = 19 g/mol Mole of cobalt = 0.153 moleMole of fluorine = Mole of cobalt = 0.153 moleMass of fluorine = ?Mole = mass / molar mass
0.153 = Mass of fluorine / 19
Cross multiply
Mass of fluorine = 0.153 × 19
Mass of fluorine = 2.91 g
Thus, the mass of fluorine is 2.91 g
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Describe two careers in the Information and Support Services pathway and the types of technology that each job uses. What is the function of an operating system?
An operating system is a piece of software that, among other things, controls peripheral devices like disc drives and printers as well as files, memory, processes, input, and output.
What are the various information technology career paths?Architecture, information security, programming, systems, networking, analyst, development, project management, or information systems management are all possible career paths.
What three professions fall under the umbrella of health informatics?Careers in health informatics incorporate ideas and techniques from information science, computer science, and healthcare. These specialists might serve as clinical analysts, health information specialists, and managers of computer systems. They can also pursue employment in applied research and higher education.
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Choose one of the careers in the Information and Support Services career pathway and discuss how this job has evolved over time. How has this change impacted our society?
The Information and Support Services career pathway is an expansive field that has seen many changes over the years. One such career is IT support technicians.
What is society?Society is a group of individuals living together in an organized manner, interacting with one another, and sharing a common culture. It is a complex system through which people interact with each other, form relationships, and build communities.
This job, which originally focused on the installation and maintenance of computer hardware and software, has evolved over time to encompass a much wider range of responsibilities.
Today, IT support technicians not only install and maintain hardware and software, but are also responsible for providing technical support to users, troubleshooting problems, setting up networks, and implementing security measures. They are also responsible for creating and managing databases, configuring and managing software applications, and monitoring system performance. This shift from hardware and software installation to a more comprehensive and technical role has had a significant impact on our society.
The increased complexity of IT systems and the need for sophisticated technical knowledge has meant the job of IT support technicians has become more important than ever. These technicians are now essential to the functioning of businesses, governments, and other organizations, as they are responsible for helping to ensure their systems and networks remain secure and operational. They are also important in helping organizations maximize the efficiency of their systems and ensuring that their users have access to the information they need.
The changing role of IT support technicians has had a positive effect on our society by providing increased access to technology and more widespread adoption of digital services. As more organizations move their operations to the cloud, IT support technicians will be essential in helping them ensure that their systems remain secure and efficient. Furthermore, their knowledge and expertise will be invaluable in helping to protect users from malicious attacks and ensuring that data is kept secure.
Overall, IT support technicians have seen their roles evolve over time, and this evolution has had a positive impact on our society. They are now essential to the functioning of businesses, governments, and other organizations, and their expertise is invaluable in helping ensure the safety and security of our networks, data, and users.
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Use this formula for the following questions: 3CaCl2
Underline the coefficient and circle the subscript.
How many calcium atoms?
How many total atoms in the formula?
1. The number of atoms of calcium in the compound is 1.806×10²⁴ atoms
2. The total atoms in the formula is 1.806×10²⁴ atoms
1. How do i determine the number of atoms?The number of atoms in the compound can be obtained as follow:
Formula of compound = 3CaCl₂Number of mole of Ca = 3 molesNumber of atoms =?1 mole of Ca = 6.02×10²³ atoms
Therefore,
3 moles of Ca = (3 moles × 6.02×10²³ atoms) / 1 mole
3 moles of Ca = 1.806×10²⁴ atoms
Thus, the number of atoms of calcium is 1.806×10²⁴ atoms
2. How do i determine the total atoms?The total atoms in the compound can be obtained as follow:
Formula of compound = 3CaCl₂Number of mole of compound = 3 molesTotal atoms =?1 mole of CaCl₂ = 6.02×10²³ atoms
Therefore,
3 moles of CaCl₂ = (3 moles × 6.02×10²³ atoms) / 1 mole
3 moles of CaCl₂ = 1.806×10²⁴ atoms
Thus, the total atoms is 1.806×10²⁴ atoms
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16. Based on your knowledge of the scientific method, which statement identifies an observation?
• A. If my neighbor is burning leaves, then I should be able to see smoke because fire produces smoke
• B. I will check to see if smoke is coming from my neighbor's yard
• C. My neighbor is probably burning leaves
• D. I smell smoke when I walk outside.
An observation is that I can smell smoke as soon as I step outside.
Why is observation important?Keeping a close eye on someone or something is the act of observation, such as keeping a close eye on how the planets are moving. When you see or watch something and give it some thought, you can make an observation.
What is workplace observation?The Workplace Observation evaluation gauges an employee's capacity for observing, following, comprehending, and assessing processes, demonstrations, as well as other workplace practices.
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For all the reactions, identify the reaction type and name the products formed.
1) Provide the balanced chemical equation for the complete combustion of propan-2-ol
2) 2 moles of Fluorine gas react with 2-methylpropane (provide at least two structural isomers)
3) 4-methylpent-1-ene reacts with hydrogen bromide (identify major and minor products if necessary)
MUST BE DONE ASAP 35 POINTS
Answer:
1) Reaction type: Combustion
Balanced equation: C3H8O + 5O2 → 3CO2 + 4H2O
2) Reaction type: Halogenation
Balanced equation: C4H10 + 2F2 → C4H9F + HF + F
Structural isomers of 2-methylpropane:
- 2-fluoro-2-methylpropane
- 2,2-difluoropropane
3) Reaction type: Addition
Balanced equation: C6H12 + HBr → C6H13Br
The major product is 4-bromo-4-methylpentane. The minor product is 3-bromo-4-methylpentane.
How does sickle cell anemia effect homostasis?
What is the possibility sickle cell anemia is passed on?
How many people get this disease? How common is this disease? Who is most likley to get it?
What is the diagnosis for sickle cell anemia?
Sickle cell anemia is a genetic blood disorder that affects shape and function of red blood cells.
How does sickle cell anemia effect hemostasis?Sickle cell anemia is a genetic blood disorder that affects the shape and function of red blood cells. Hemostasis refers to process of maintaining balance between clotting and bleeding and sickle cell anemia can disrupt this balance in several ways.
One of the main effects of sickle cell anemia on hemostasis is that it can cause Vaso-occlusion, which is blockage of small blood vessels by sickle cells. This can cause tissue damage, inflammation and pain, which in turn can trigger an overactive clotting response.
Sickle cell anemia is caused by mutations in HBB gene, which provides instructions for making protein called hemoglobin.
Sickle cell anemia is most commonly found in people of African descent, although it can also occur in people of Hispanic, Middle Eastern, and Mediterranean ancestry.
Diagnosis of sickle cell anemia involves blood test to look for the presence of sickle hemoglobin.
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In order to survive, organisms must maintain stable conditions in their bodies, even though their external environments are always changing.
For example, humans need to maintain an internal temperature around 37°C. Blood needs to have a pH around 7.4 and an oxygen saturation close to 100%.
What needs to happen in order to maintain these conditions?
A.
Organisms must be at rest.
B.
Genes must be altered each time cells replicate.
C.
Organ systems must interact with one another.
D.
all of these
A.Homeostasis Conditions inside of an organ system must remain constant, despite changes to its external environment.An organism is kept alive by numerous chemical processes.
What mechanism does the organism use to keep its surroundings stable?Homeostasis is a self-regulating process that allows an organism to retain internal stability while adapting to shifting external situations. It has emerged as the key unifying idea of physiology.
When are living things capable of maintaining constant internal conditions?The preservation of a steady internal environment is known as homeostasis.The term "homeostasis" was developed to define the chemical and physical conditions that an organism needs maintain in order for its constituent cells, tissues, organs, or organ systems to function correctly.
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Lysozyme is an enzyme that breaks bacterial cell walls. A
solution containing 0.150 g of this enzyme in 210 mL of
solution has an osmotic pressure of 0.953 torr at 25 °C.
What is the molar mass of lysozyme?
If Lysozyme is an enzyme that breaks bacterial cell walls. The molar mass is: 1.40×104 g/mol..
How to find the molar mass?Osmotic pressure (Π):
Π = M × R × T
where:
M is the molarity of the solution
R is the ideal gas constant
T is the absolute temperature.
So,
M = Π / (R × T)
Π = 0.953 torr × (0.001316 atm / 1 torr) = 0.001254 atm
R = 0.0821 atm L mol-1 K-1
T = 25.0°C + 273 = 298 K
Molarity of lysozome solution = (0.001254 atm) / (0.0821 atm L mol-1 K-1 × 298 K) = 0.00005126 mol/L
Molarity of lysozome solution = 0.00005 mol/L
(0.15 g lysozome) × (1 L soln/ 0.00005126 mol lysozome) × (1 / 0.21 L soln) = 13934.56 g/mol
Molar mass of lysozome = 13934.56 g/mol
Molar mass of lysozome = 1.40×104 g/mol.
Therefore the molar mass of lysozome is 1.40×104 g/mol.
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1. Where would the convection currents be in this boiling pot of water?
2. What part of the water is the hottest?
3. What part of the water is the coolest?
4. Where is the water most dense?
5. Where is the water least dense?
6. Describe how the water in this pot will move?
All the questions- answers are mentioned below.
What is temperature ?
Temperature is a unit used to represent how hot or cold something is. It can be stated using the Celsius or Fahrenheit scales, among others. Temperature shows which way heat energy will naturally flow, i.e., from a hotter (body with a higher temperature) to a colder (body with a lower temperature) (one at a lower temperature).
What is convection currents?
By the mass motion of a fluid, such as water, air, or molten rock, convection currents move heat from one location to another. The ocean currents, atmospheric weather, and geology of the earth are all driven by the heat transfer function of convection currents.
Water boiling in a pot can be seen to have convection currents. The water is heated by the heat source at the pan's base, which also gives the water more energy and causes its molecules to flow more quickly. Water density is impacted by temperature changes as well. The water is heated by the heat source at the pan's base, which also gives the water more energy and causes its molecules to flow more quickly. Water density is impacted by temperature changes as well.
Therefore, All the questions- answers are mentioned above.
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NH3 is a weak base ( b=1.8×10−5 ) and so the salt NH4Cl acts as a weak acid. What is the pH of a solution that is 0.036
M in NH4Cl at 25 °C?
the pH of a solution that is 0.036 M in NH4Cl at 25 °C, x=5.3×10−6 M.
How acidic is a buffer that contains 0.020 M NH3 и 0.030 M NH4Cl?We obtain a pH of 9.068 and 9.07 n by dividing the logarithm of the ammonium acid concentration (0.03) by the log of a ammonia concentration (0.02).
Is NH4Cl a salt with a high acidity?Ammonia is a salt of a weak base and a strong acid, such as hydrochloric acid (like ammonium hydroxide).Ammonium chloride's formula is NH 4 Cl, hydrochloric acid's formula is and ammonium hydroxide's formula is NH 4 OH.
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Calculate the mass in grams of 4.21×1024
molecules of propylamine. The chemical formula for propylamine is C3H9N.
Answer:
413.9 grams.
Explanation:
First, we need to calculate the molar mass of propylamine (C3H9N):
Molar mass of propylamine = (3 × atomic mass of carbon) + (9 × atomic mass of hydrogen) + atomic mass of nitrogen
Molar mass of propylamine = (3 × 12.01 g/mol) + (9 × 1.01 g/mol) + 14.01 g/mol
Molar mass of propylamine = 59.11 g/mol
Next, we can use Avogadro's number to convert the number of molecules to moles:
1 mole of propylamine = 6.022 × 10^23 molecules
moles of propylamine = (4.21 × 10^24 molecules) / (6.022 × 10^23 molecules/mol)
moles of propylamine = 7.001 mol
Finally, we can use the molar mass to convert moles to grams:
mass of propylamine = moles of propylamine × molar mass of propylamine
mass of propylamine = 7.001 mol × 59.11 g/mol
mass of propylamine = 413.9 g
Therefore, the mass of 4.21×1024 molecules of propylamine is 413.9 grams.
please help :(
i have no idea what this even means lol
Here are the answers for A and B.
Answer:
(a) 80% are metals.
(b) (1.) Metals are malleable and ductile. (2.) Metals are dense.
Explanation:
(a) If you look at the picture, there are faint lines dividing the circle into ten parts. Metals take up 8 sections and non-metals take up 2. This means that the number of metals on the periodic table takes up 80% and non-metals take up 20%.
(b) There are many physical properties of metals, but two of them are that metals are malleable & ductile (these relate to how metal can be shaped) and that metals are dense (density = mass ÷ volume).
How many liters of oxygen at STP are produced
from 1759 of water?
2 Cytot 1302 → 8C02 + 10H120
Answer:
the answer is 11.2 of oxygen at STP
What is the mass of 3.5 moles of sodium hydroxide
Answer: The mass of 3,5 moles of NaOH is 139,99 g
What is the mass, in grams, of 2.45 moles of calcium atoms?
Answer:
98.20 g
Explanation:
1 mole of Ca has 40.08 g
=> 2.45 x 40.08 = 98.196 or 98.20 g
please answer fast (i will give 22 points)
Answer:
red in acid and green in a base
Explanation:
cabbage juice liquid thing is a pH indicator
40.532 g of an unknown compound X is dissolved in 351.11 mL. What is the molarity of X? Here is some information to determine the identity of X. When 1.00g of X is dissolved in water and allowed to react wtih AgNO3, all the chlorine in X precipitates and 1.95g of AgCl is collected. When 1.00g of X undergoes complete combustion, 0.900 g of CO2 and 0.735 g of H2O were collected. The empirical and molecular formula are identical. Compound X only contains carbon, hydrogen, nitrogen, and chlorine.
Gaseous methane CH4 will react with gaseous oxygen O2 to produce gaseous carbon dioxide CO2 and gaseous water H2O. Suppose 2.41 g of methane is mixed with 4.6 g of oxygen. Calculate the maximum mass of water that could be produced by the chemical reaction. Round your answer to 2 significant digits.
Answer:
2.5 g
Explanation:
The balanced chemical equation for the reaction is:
CH4 + 2O2 → CO2 + 2H2O
From the equation, we can see that for every 1 mole of methane reacted, 2 moles of water are produced. Therefore, we need to first calculate the number of methane and oxygen moles in the reaction mixture.
The molar mass of methane is 16.04 g/mol, so the number of moles of methane present is:
2.41 g / 16.04 g/mol = 0.15 mol
The molar mass of oxygen is 32.00 g/mol, so the number of moles of oxygen present is:
4.6 g / 32.00 g/mol = 0.14 mol
We can see insufficient oxygen to react completely with all of the methane, so oxygen is the limiting reagent. To determine the maximum amount of water that can be produced, we need to use the number of moles of oxygen to calculate the number of moles of water produced and then convert that to a mass using the molar mass of water.
The balanced equation shows that 2 moles of water are produced for every 2 moles of oxygen. Therefore, the number of moles of water produced is:
0.14 mol O2 × (2 mol H2O / 2 mol O2) = 0.14 mol H2O
The molar mass of water is 18.02 g/mol, so the mass of water produced is:
0.14 mol H2O × 18.02 g/mol = 2.53 g
Rounding to 2 significant digits, the maximum mass of water that could be produced is 2.5 g.
what is Cobalt (II) iodide and sodium carbonate net ionic equation
Answer:
Co2+ + CO32- → CoCO3
Explanation:
The molecular equation for the reaction between cobalt (II) iodide and sodium carbonate is:
CoI2 + Na2CO3 → CoCO3 + 2NaI
To write the net ionic equation, we need to eliminate the spectator ions, which are the ions that appear on both the reactant and product side of the equation and do not participate in the reaction. In this case, the spectator ions are Na+ and I-.
The net ionic equation for this reaction is:
Co2+ + CO32- → CoCO3
Therefore, the net ionic equation for the reaction between cobalt (II) iodide and sodium carbonate is:
Co2+ + CO32- → CoCO3
H2 + Br2 → 2HBr
How many moles of bromine are produced by the synthesis of 6.9 moles of hydrobromic acid, HBr?
The moles of bromine needed to produce 6.9 moles of hydrobromic acid, HBr is 3.45 moles
How do I determine the mole of bromine needed?First, we shall write the balanced equation showing the synthesis of hydrobromic acid, HBr . This is shown below
H₂ + Br₂ -> 2HBr
From the balanced equation above,
2 moles of HBr were obtained from 1 mole of Br₂.
With the above information, we can determine the number of moles of bromine needed to produce 6.90 moles of HBr. This can be obtained as follow:
From the balanced equation above,
2 moles of HBr were obtained from 1 mole of Br₂.
Therefore,
6.90 moles of HBr will be obtain from = (6.9 × 1) / 2 = 3.45 moles of Br₂
Thus, we can conclude that number of mole needed is 3.45 moles
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when is an inferential control configuration needed? what do you think is its primary weakness? compare it to a simple feedback control configuration. which on is preferable?
By using inferential control, the difficult-to-measure controlled variables are approximated from certain simple process variables before being used in feedback control.
Which tool is employed to measure process variables?The two types of flow meters that are frequently used to measure the density rate of flow or velocity of a flowing fluid are the venturi meter and the orifice meter. They are also referred to as variable heading meters.
Which 5 factors are the primary process variables?An element of a physical or chemical amount that is typically monitored and managed throughout the operation of a sewage, wastewater, or industry treatment facility. Process variables like flow, level, tension, temp, turbidity, chlorine, & oxygen concentrations are frequently used.
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Zn + 2HCl → ZnCl2 + H2
How many moles of hydrogen are produced from the reaction of 2.3 moles of zinc?
2.3 moles of zinc will produce 4.6 moles of hydrogen gas.
What is the molar ratio between zinc and hydrogen in the given chemical equation?Answer: The molar ratio between zinc and hydrogen in the given chemical equation is 1:1, which means that one mole of zinc reacts with one mole of hydrogen to produce one mole of hydrogen gas.
From the balanced chemical equation, 1 mole of Zn reacts with 2 moles of HCl to produce 1 mole of H2. Therefore, to determine the number of moles of H2 produced from 2.3 moles of Zn, we need to use stoichiometry.
1 mole of Zn → 1 mole of H2
2.3 moles of Zn → x moles of H2
x = 2.3 moles of H2
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Calculate the following and povide the answer rounded off to the correct accuracy
(8,12-0,9800)g×(3.4501+0,16)ml
Explanation:
First, let's simplify the expression inside the parentheses:
8.12 - 0.9800 = 7.14 g 3.4501 + 0.16 = 3.6101 ml
Now we can multiply:
7.14 g x 3.6101 ml = 25.775914 g·ml
Rounding off to the correct accuracy (which is the product of the two original values), we get:
25.8 g·ml