Answer:
Final volume=V₂ = 216.3 mL
Explanation:
Given data:
Initial volume = 120.0 mL
Initial temperature = -12.3 °C (-12.3 +273 = 260.7 K)
Final volume = ?
Final temperature = 197.0 °C (197+273 = 470 K)
Solution:
We will apply Charles Law to solve the problem.
According to this law, The volume of given amount of a gas is directly proportional to its temperature at constant number of moles and pressure.
Mathematical expression:
V₁/T₁ = V₂/T₂
V₁ = Initial volume
T₁ = Initial temperature
V₂ = Final volume
T₂ = Final temperature
Now we will put the values in formula.
V₁/T₁ = V₂/T₂
V₂ = V₁T₂/T₁
V₂ = 120 mL × 470 K /260.7K
V₂ = 56400 mL.K /260.7K
V₂ = 216.3 mL
HELP!!!!
An unknown gas effuses at a rate of 2.0 times the rate of CL2. What is the molar mass of the unknown gas?
The molar mass of the unknown gas is 17.75 g/mol
From Graham's law of diffusion, we understood that the rate of diffusion of a gas is inversely proportional to the square root of the molar mass of the gas as shown below:R ∝ [tex]\frac{1}{\sqrt{M}}[/tex]
Expanding further, we have
[tex]\frac{R_{1} }{R_{2} } = \sqrt{\frac{M_{2}}{M_{1}} }[/tex]
Where
R₁ and R₂ are the rate of diffusion of the individual gas
M₁ and M₂ are the molar masses of the individual gas.
With the above information in mind, we can obtain the molar mass of the unknown gas as follow:
Let R₁ be the rate of the unknown gas
Let R₂ be rate of Cl₂ gas
Let M₁ be the molar mass of the unknown gas
Let M₂ be the molar mass of the Cl₂ gas
From the question given above, we were obtained the following:
Rate of the unknown gas = 2 times the rate of Cl₂ i.e
R₁ = 2R₂Molar mass of Cl₂ (M₂) = 2 × 35.5 = 71 g/mol
Molar mass of the unknown gas (M₁) =?[tex]\frac{R_{1} }{R_{2} } = \sqrt{\frac{M_{2}}{M_{1}} }\\\\\\\frac{2R_{2}}{R_{2} } = \sqrt{\frac{7 1}{M_{1}} }\\\\2 = \sqrt{\frac{7 1}{M_{1}} }[/tex]
Square both sides[tex]2^{2} = \frac{71}{M_{1}} \\\\4 = \frac{71}{M_{1}}[/tex]
Cross multiply4 × M₁ = 71
Divide both side by 4[tex]M_{1} = \frac{71}{4}[/tex]
M₁ = 17.75 g/molTherefore, the molar mass of the unknown gas is 17.75 g/mol
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An element has three isotopes: St-284 (34.60%), St-285 (21.20%), and St-288 (44.20%). What is its average atomic mass?
Answer: I believe that it’ll be 284.45
Explanation:
May have to double check but I’m pretty sure that’s correct sorry if it’s not
Activities that shows the nature and goals of anthropology,Sociology and Political Science
To answer the question effectively, we will talk about the key words in the question.
ANTHROPOLOGY, SOCIOLOGY AND POLITICAL SCIENCE.
ANTHROPOLOGY; This is the study of human kinds in all times and places,it also entails humanistic study which includes our prehistoric origins and contemporary human diversity as well as topics like social change,globalization,human origin and the world history.
The activities that shows the nature and goals of anthropology includes;
- Looking at ones own culture in a more objective way like an outsider.
- Discovering the things that make people more different from one another.
- Producing new theories and knowledge about human home and their behaviors.
- Discovering/finding out what all people have in common.
There are four fields of anthropology; Linguistic anthropology, Biological anthropology, Archeology and cultural anthropology.
SOCIOLOGY; This is the scientific study of human civilization.
It is systemic and studies of groups and societies that people build
and the effect these have on their behavior.
Sociology greatly focuses on various social connections,
structures, organizations, processes and institutions.
The activities that show the goals and nature of sociology includes;
- Broadening our familiarity on facts about sociology.
- Critically studying the nature of humanity.
- Exposing our minds to the diverse perspectives on attaining the truth.
- Obtaining possible theories about the society.
- Understanding and appreciating that all things in the society are interdependent with each other.
Sociology brings together inputs that are composed of frequent forms and manners,they include; view points, consolidated values, attitudes and the norms of social institutions.
The different branches of sociology are; social psychology,social organisation, applied sociology, population studies, sociological theory and research,human ecology,social change.
POLITICAL SCIENCE; This is a discipline in academics that deals with the study of political processes, institutions, governments and behaviors of people.
It studies the complex behaviors of the people in power, various political actors, such as the government administration, opposition ad the subjects which are the masses.
Anthropology, sociology and political science are areas of social science, whose main objective is to study society in historical, social and cultural contexts.
Anthropology is the science that studies the human being in depth considering biological, social and cultural aspects. Its objective is to understand the development of man in these aspects.Sociology has as its nature the study of societies, its objective is to understand the behavior of man in social formations.Political science is the science that studies the systems of government and formation of political power in society. Its aim is to better understand political institutions and their impact on society.Therefore, the social sciences seek to analyze and understand man through society, culture, economy and politics, with the aim of contributing to the development of a more egalitarian society with a better quality of life.
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A pitcher throws a 142 g baseball, which accelerates at a speed of 9 m/s^2. How much force does the pitcher apply to the ball?
Answer:
The answer is 1.28 NExplanation:
The force acting on an object given the mass and acceleration we use the formula
force = mass × accelerationFrom the question
mass = 142 g = 0.142 kg
acceleration = 9 m/s²
We have
force = 0.142 × 9 = 1.278
We have the final answer as
1.28 NHope this helps you
Answer:
1.28
Explanation:
In order for you to get the force you have to multiply the mass & acceleration. The baseball mass is 142 g and the acceleration is 9. So you will calculate 0.142 x 9 and that will give you 1.278. You will then round the 7 to an 8 and then you get the answer 1.28.
if you know the answer to any of these pls help out I'll give brainiest. also a lot of points
Answer:
5. Divergent boundaries. Divergent boundaries can make underwater ocean trenches.
The density of a gas is 0.88 g/mL. What is the mass of 500.0 mL of this gas?
Answer:
The answer is 440 gExplanation:
The mass of a substance when given the density and volume can be found by using the formula
mass = Density × volumeFrom the question
volume of gas = 500 mL
density = 0.88 g/mL
We have
mass = 0.88 × 500
We have the final answer as
440 gHope this helps you
Are all atoms of an element identical and how do we know
Answer:
No, because they can each have different number of neurons but be the same element
a
Select the correct answer.
In which of these examples does chemical energy change to electrical energy?
A. digesting food
B. photosynthesis
O C. respiration
D. using a battery
Reset
Next
Answer:
D. Using a battery
Answer:
I hope this helps
Explanation:
Which is the best definition of nonpolar covalent bond?
Answer:
It is one of the covalent bonds in which the electrons are shared equally; therefore, dipole moment exists between the atoms in a molecule and there is no charge separation between the atoms in a molecule.
Answer: A covalent bond in which the electrons are shared equally
Explanation:
A P E X
Question 7 of 10
You have two pieces of metal. Metal A has a higher temperature than metal
B. What does this tell you about them?
A. The molecules in metal A are vibrating faster.
B. There is more light energy in metal B.
C. Metal B has more heat energy.
D. Metal A has more gravitational potential energy.
SUBMIT
Answer:
Answer is A.
Explanation:
What is the electron geometry of PF3?
Answer:
PF3 has a trigonal pyramidal molecular geometry.
Explanation:
PF3 has four regions of electron density / electron clouds around the central P atom. The regions of electrons make a tetrahedral arrangement with a bond angle of 109.5°. Only three regions of electrons are bonding and one is non-bonding, so the overall shape is trigonal pyramidal.
The electron geometry of [tex]PF_{3}[/tex] is trigonal pyramidal.
What are the characteristics of trigonal pyramidal geometry?In chemistry, a trigonal pyramid is a molecular shape that resembles a tetrahedron and has one atom at the top and three at the corners of the base (not to be confused with the tetrahedral geometry). The molecule belongs to the point group [tex]C_{3v}[/tex] when all three of the atoms in the corners are the same. The pnictogen hydrides ([tex]XH_{3}[/tex]), xenon trioxide ([tex]XeO_{3}[/tex]), the chlorate ion, [tex]ClO^{-} _{3}[/tex], and the sulfite ion, [tex]SO^{-2} _{3}[/tex] are some molecules and ions with trigonal pyramidal structure. Trigonal pyramidal-shaped molecules are sometimes referred to as sp3 hybridized in organic chemistry.Trigonal pyramidal is a molecular shape formed when three bonds and one lone pair exist on the central atom of the molecule. Sp3 hybridization occurs at the central atom of molecules with tetrahedral electron pair geometries. Ammonia (NH3) is a pyramidal trigonal molecule.To learn more about trigonal pyramidal geometry, refer to
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boiling and melting points exploration
Answer:
Boiling- 212° F melting- 32°F
Explanation:
What is the term for an object's strength of motion?
O Momentum
O Acceleration
O
Force
O
Velocity
I'm pretty sure its momentum
Are two atoms of the same element identical?
Answer:
Depends on if the atoms have the same amount of atomic mass and if they have the same amount of ions, or none at all.
Explanation:
They can be the same atom, but if they don't have the same amount of protons, electrons, and neutrons, they aren't identical.
WILL GIVE BRAINLIEST. If the frequency of X-ray radiation is increased, what changes? I. The number of photons. II. The energy of the radiation. III. The amplitude of the wave. IV. The wavelength of the radiation. I and II I and III I and IV II and III II and IV.
Answer:
II and IV.
Explanation:
To know which option is correct, do the following:
Energy (E) and frequency (f) are related by the following equation:
E = hf
Where:
E is the energy.
h is the Planck's constant.
f is the frequency.
From the equation E = hf
Energy is directly proportional to the frequency. This implies that an increase in the frequency will also increase the energy and a decrease in the frequency will also decrease the energy.
Therefore, (II) in the question above is correct.
Velocity (v), wavelength (λ) and frequency (f) are related by the following equation:
v = λf
Divide both side by λ
f = v/λ
Thus, we can see clearly that the frequency is inversely proportional to the wavelength. This means that an increase in frequency will decrease the wavelength and a decrease in frequency will increase the wavelength.
Therefore, (IV) in question above is correct.
Thus, II and IV are the correct answers.
Which substance cannot be broken down by chemical changes? Magnesium Hydroxide Carbon Dioxide b O Ammonia Iron
Answer:
Iron
Explanation:
The only substance that cannot be broken down by a chemical change is Iron.
Iron is an element and elements are made up of atoms. Atoms are the smallest indivisible particles that takes part in chemical reactions.
Other choices are compounds. Compounds are made by combining atoms together through the loss, gain or sharing of electrons. This interaction creates bonds between two or more species. But for substances made up of atoms alone, no bonds are formed and hence, they cannot be further broken down.Which of the following statements is true?
Erosion can be reduced by planting trees and other plants.
Warm air is more denser than cold air.
It forms areas of high pressure.
Most of the earth's freshwater is located deep below the crust.
The most abundance gas in the atmosphere is oxygen.
Answer:
erosion can be reduced by planting trees and other plants
Answer:
A
Explanation:
what are the coefficients for the reaction _Cl2O5+_H2O>_HCIO3 once it is balanced
Answer:
1.9472857e+56
Explanation: Ask Google
what is one beneift of using scientific notation instead of regular notation
Answer:
its shorter than a regular one
Explanation:
the only reason is simply because it is shorter
write formulas: a) 3 nitrogen atoms, b) 2 phosphorus molecules // help please with these
Explanation:
a)3 N
b)2 P4
hope it will help u
What symbol is used to separate the products from each other or the reactants from each other in a chemical reaction?
an arrow pointing to the left
an equal sign
an arrow pointing to the right
a plus sign
Answer:
a plus sign: +
Explanation:
a plus sign is used to separate one reactant or product from another
Answer:
(Chemical Formulas test)
1.Which formula contains a metal and a nonmetal?
answer:(MGO)
2.Which formula represents a covalent compound?
answer:(H2O2)
3.In the formula for water (H2O), what does the lack of a subscript after the O indicate? answer:(There is one oxygen atom in the compound.)
4.What symbol is used to separate the products from each other or the reactants from each other in a chemical reaction?answer: (A PLUS SIGHN)
5.Which option is a covalent compound?
answer:(NO2)
Explanation:
Took the Test and got 100% thank me later
if i change it by looking at it what type of change is it ?
non impact
kinetic
physical
chemical
Answer:
the answer to this is non impact
pls answer and i will mark u brainliest
question:- A precious metal used in jewelry and found in a pure form in nature is:
options are :-
a. Silver
b. platinum
c. Zinc
d. copper
I want someone he is good in chemistry
Answer:
.I can help you.....Explanation:
am good atmoles
bonding
balancing equations
and set ups
You measured the mass of Coke as 21.36 grams and the volume as 20.50 ml. What is the density of Coke in
g/mL?
Answer:
The answer is 1.04 g/mLExplanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\[/tex]
From the question
mass of coke = 21.36 g
volume = 20.5 mL
So we have
[tex]density = \frac{21.36}{20.50} \\ = 1.0419512...[/tex]
We have the final answer as
1.04 g/mLHope this helps you
For an investigation a student poured a blue solution of CuSO4 into a beaker. The student placed a shiny silver colored strip of zinc metal in the solution and observed the changes, The student inferred that a chemical reaction occurred. What evidence supports this inference?
Answer:
It is the second answer; A dark solid formed on the zinc.
Explanation:
This is the correct answer because when a solid is formed it is called a precipitate, which is commonly known as a chemical reaction.
The evidence that supports the student's inference is a dark solid formed on the zinc.
Chemical reaction of zinc metal with CuSO4When zinc is added to copper sulphate (CuSO4) solution, due to more reactivity of zinc, copper is replaced by zinc and forms zinc sulphate precipate.
Thus, the student is correct, there will be a chemical reatcion between the zinc and copper sulphate (CuSO4) solution, producing a dark solid substance.
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Help out ? Will mark brainliest!!!!!!!
Answer:
32000 pounds
14741.752 kilograms
14741752 grams
16.25 tons
What is the chemical name for LiC2H3O2 or C2H3O2Li
Answer:
AWAWDWDAD
Explanation:
Elements in the same period of the periodic table exhibit similar physical and chemical properties.
Answer:
same valency electrons
Explanation:
example g 1 elements
Foods cook faster when placed in a pressure cooker. This is because the pressure on the surface of the water is
Answer:higher than and higher than
Explanation:
