Answer:
2.1 atm
Explanation:
We are given the following variables to work with:
Initial pressure (P1): 2.5 atm
Initial temperature (T1): 320 K
Final temperature (T2): 273 K
Constant volume: 7.0 L
We are asked to find the final pressure (P2). Since volume is constant, we want to choose a gas law equation that relates initial pressure and temperature to final pressure and temperature. Gay-Lussac's law does this:
[tex]\frac{P_{1}}{T_1} =\frac{P_{2}}{T_2} \\[/tex]
We can rearrange the law algebraically to solve for [tex]P_{2}[/tex].
[tex]{P_{2}} =\frac{(T_2)(P_{1} )}{T_1} \\[/tex]
Substitute your known variables and solve:
[tex]P_2 = \frac{273K(2.5atm)}{320K} = 2.1 atm[/tex]
¿Cuántos gramos de dicloruro de manganeso se obtienen cuando reaccionan 7,5 g de ácido clorhídrico? MnO2 + 4 HCl = Mn Cl2 + Cl2 + 2 H2O *
Answer:
6.6 g
Explanation:
La ecuación de la reacción es;
MnO2 + 4 HCl -------> MnCl2 + Cl2 + 2H2O
Número de moles de HCl que reaccionan = 7.5g / 36.5 g / mol = 0.21 moles
Dado que;
4 moles de HCl producen 1 mol de MnCl2
0,21 moles de HCl producen 0,21 * 1/4 = 0,0525 moles de MnCl2.
Masa de MnCl2 = 125,844 g / mol * 0,0525 moles = 6.6 g
3. You believe that water boils at 212 degrees Fahrenheit (100 degrees Celsius). Write the numberon the scale from best to worst.
1. Your cousin said that he tested the temperature of water boiling and found that it was 100°C.
2. Most people you know believe that water boils at 100°C.
3. You used a thermometer to measure the temperature at which water boiled. You repeated the experiment 3 times. Each time the thermometer read 100°C.
4. You read an article in a science journal from 50 different labs around the world that have tested the temperature of water and found that it boils at 100°C in every location.
You come across an article in a scientific journal from 50 different laboratories around the globe that measured the boiling point of water and discovered that it is 100°C everywhere.
What transpires when water is heated to 100 C (This is 212 F)?Water turns into gas around 212°F (100°C), which is the temperature at which it begins to boil (water vapor). Pressure affects the melting/freezing and boiling points. Water's boiling point changes when air pressure changes. The boiling point decreases with increasing altitude or decreasing pressure.
At 212 degrees Fahrenheit, does water boil, or at 100 degrees?Water has a freezing point of 32 degrees Fahrenheit and a boiling point of 212 degrees Fahrenheit on the Fahrenheit scale.
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would the pressure exerted by the gas in the tank would increase if the scuba tank were to increase in temperature?
Answer:
In fact, a full scuba tank will gain about 5-6 psi for every degree of temperature increase. This is one reason that full tanks should not be left in a hot trunk of a car. A tank filled to 3000 psi could easily reach 3500 psi if the temperature of it increased substantially.
What do YOU think? Is the movement to 100% renewable energy possible? Why, or why not?
Answer:
i dont know
Explanation:
ask your science teacher
Why do cations and anions form?
2) Liquid soap is dissolve in water to make a soap solution. Why is this
solution called a mixture?
Explanation:
Soap solution is called a mixture because you're combining a ratio of liquid soap and water to make a mixture.
How do atmospheric updrafts affect clouds?
Answer:
Updrafts characterize a storm's early development, during which warm air rises to the level where condensation begins and precipitation starts to develop. In a mature storm, updrafts are present alongside downdrafts caused by cooling and by falling precipitation.
Hope it helps
Have a great Day : P
Which of the following would cause entropy to decrease?
A. CO2(g) → C02()
B. CO2(s) + CO2()
C. CO2() + CO2(9)
D. CO2(s) → C02(9)
The change that would cause entropy to decrease is CO2 gas changing to solid:
CO2(g) → C02(s)What is entropy?Entropy refers to the degree of randomness of a substance.
The higher the degree of randomness the higher the entropy value of that substance.
Entropy increases with increase in temperature as particles of substances gain more kinetic energy.
However, lowering temperature decreases entropy values.
The change from gas to liquid or solid involves lowering of temperature.
Therefore, the change that would cause entropy to decrease is CO2 gas changing to solid.
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A tank consists of a gaseous mixture of 3.83 g of triselenium diiodide, 2.62 g of ammonium telluride, and 1.82 g of iridium (i) sulfate. What is the partial pressure in atm of ammonium telluride if the total pressure in the tank is 2.795 atm?
Answer: The partial pressure in atm of ammonium telluride is 1.48 atm
Explanation:
According to Raoult's law, the partail pressure of a component at a given temperature is equal to the mole fraction of that component multiplied by the total pressure
[tex]p_A=x\times p_{total}[/tex]
where, x = mole fraction
[tex]p_A[/tex] = partial pressure of A
[tex]p_{total}[/tex] = total pressure
[tex]x_{\text {ammonium telluride}}=\frac{\text {moles of ammonium telluride}}{\text {total moles}}[/tex],
[tex]x_{\text {ammonium telluride}}=\frac{\frac{2.62g}{164g/mol}}{\frac{2.62g}{164g/mol}+\frac{3.83g}{333g/mol}+\frac{1.82g}{673g/mol}}=0.53[/tex]
[tex]p_{\text {ammonium telluride}}=0.53\times 2.795atm=1.481atm[/tex]
Thus the partial pressure in atm of ammonium telluride is 1.48 atm
10. Which one of the following is not true about covalent bonds?
Most covalent substances do not dissolve well in water
Covalent bond can form polar and non polar bonds and shape
Covalent bond is one of the strongest bonds
Most of covalent substance does not conduct heat and electricity
Most covalent bonds have moderate to love melting and boiling point
Answer:
Most covalent bonds have moderate to love melting and boiling point
Explanation:
Most covalent compounds have relatively low melting points and boiling points.
UGRENT! Please help showing all work
Answer:
a. The limiting reactant is Ca(OH)₂
b. The theoretical yield of CaCl₂ is approximately 621.488 grams
c. The percentage yield of CaCl₂ is approximately 47.06%
Explanation:
a. The given chemical reaction is presented as follows;
Ca(OH)₂ + 2HCl → CaCl₂ + 2H₂O
Therefore;
One mole of Ca(OH)₂ reacts with two moles of HCl to produce one mole of CaCl₂ and two moles of water H₂O
The mass of HCl in an experiment, m₁ = 229.70 g
The mass of Ca(OH)₂ in an experiment, m₂ = 207.48 g
The molar mass of HCl, MM₁ = 36.458 g/mol
The molar mass of Ca(OH)₂, MM₂ =74.093 g/mol
The number of moles of HCl, present, n₁ = m₁/MM₁
∴ n₁ = m₁/MM₁ = 229.70 g/(36.458 g/mol) ≈ 6.3 moles
The number of moles of Ca(OH)₂, present, n₂ = m₂/MM₂
∴ n₂ = m₂/MM₂ = 207.48 g/(74.093 g/mol) ≈ 2.8 moles
The number of moles of Ca(OH)₂, present, n₂ = 2.8 moles
According the chemical reaction equation the number of moles of HCl the 2.8 moles of Ca(OH)₂ will react with, = 2.8 × 2 moles = 5.6 moles of HCl
Therefore, there is an excess HCl in the reaction and Ca(OH)₂ is the limiting reactant
b. According the chemical reaction equation the number of moles of CaCl₂ produced in he reaction by the 2.8 moles of Ca(OH)₂ = 2.8 × 2 moles = 5.6 moles of CaCl₂
The molar mass of CaCl₂ = 110.98 g/mol
The mass of the 5.6 moles of CaCl₂ = 5.6 moles × 110.98 g/mol ≈ 621.488 grams
The theoretical yield of CaCl₂ ≈ 621.488 grams
c. Given that the actual mass of CaCl₂ produced = 292.5 grams, we have;
The percentage yield of CaCl₂ = The actual yield/(The theoretical yield) × 100
∴ The percentage yield of CaCl₂ = (292.5 g)/(621.488 g) × 100 ≈ 47.0644646397%
The percentage yield of CaCl₂ ≈ 47.06%.
The job of the ______ is to hold all of the parts of a cell together
Answer:
cell membrane
Explanation:
it holds everything together
How do collisions between molecules transfer energy from a system of
reacting substances to its surroundings?
A. They cause heat to flow from the system to the surroundings.
O B. They cause molecules to flow into the system from the
surroundings
C. They cause the potential energy of the system to increase
D. They cause the thermal energy of the surroundings to decrease.
Answer:
A. They cause heat to flow from the system to the surroundings.
Explanation:
Answer:
A. They cause heat to flow from the system to the surroundings.
Explanation:
a p e x , just took the quiz
URGENT
What is the total volume of a lead can if it has a mass of 800g.
Answer:
750
Explanation:
Think of a real-life situation in which measuring work and power would be important
Answer:
Being a CEO holds a lot of power and work but, you would need to be able to manage thus power to be able to keep your company running in good hands. work comes in because as a ceo you'll obviously have lots of work but you'll also have employees all of which assist you with managing work
List as many things as you can see in the picture below
Abiotic (Non-Living)___________Biotic (Living)
__________________ ................ ___________________ __________________ ................ ___________________
___________________ ___________________
How is stoichiometry used to calculate the amount of product produced?
A. Stoichiometry measures the amount of product obtained.
B. Stoichiometry determines the molar mass of the product.
C. Stoichiometry calculates the grams of the limiting reagent.
D. Stoichiometry relates moles of product.
Answer:
Stoichiometry relates moles of reactant to moles of product
Explanation:
Just took the quiz :)
Answer:
Stoichiometry relates moles of reactant to moles of product.
Explanation: :)
How many moles are in 3.0g of A1203?
Answer:
0.065 moles
Explanation:
PLEASE HELP ME. REAL ANSWERS ONLY PLZ
Answer:
Please make it full I'm not seeing it
1
What is the mass of 0.328 mol of CO2?
Answer:
use this conversation units to help you hope it helpsPLEASE I NEED YOUR HELP, I WILL GIVE 10 POINTS PLEASEEEEE
People claim these rock formations in the Sahara Desert look like a mushroom and a chicken. They were not sculpted by humans. What do you think caused them to be shaped this way?
Answer:
Erosion
Explanation:
1.Which type of text structure describes events in sequential order? A.sequence B.Cause and Effect. C. Problem And Solution. D. Compare and Contrast
2.This type of writing considers similarities and differences
A.Discripsion B.Compare and Contrast C. Sequence. D.Cause and Effect
3.in this type of writing,the reader will see words/phrases such as cause,as a result of,and due to.
A.Cause and Effect
B.Promlem and Solution
C.Order And Sequence
D.Compare And Contrast
Answer:
1 would be a. sequence
2 would be b. compare and contrast
3 would be a. cause and effect
Most of Earth's atmosphere is made up of nitrogen gas. Nitrogen can also
exist as a solid, liquid, or plasma. Four samples of nitrogen are each in a
different state but have the same mass. Which statement about the relative
amounts of thermal energy in the samples is true?
Answer:
it should be B (i did this wrk before)
Explanation:
Which type of galaxy contains mostly new stars because it has lots
of dust and gas
What is the correct order for the development of the atomic model
Answer: I think it's A. C-A-D-B
Explanation:
John Dalton's theory was publicized in 1803
J.J Thomson's theory was publicized in 1904
Ernest Rutherford's theory was publicized in 1911
And Neil Bohr's was publicized in 1926
I need help asap its due today!!!!!
Use the dichotomous key to answer the question. Of the following characteristics, which was used to classify insects?
A. presence of a head
B. shape of wings
C. number of wings
D. shape of abdomen
Answer:
B. shape of wings
Explanation:
Insect, (class Insecta or Hexapoda), any member of the largest class of the phylum Arthropoda, which is itself the largest of the animal phyla. Insects have segmented bodies, jointed legs, and external skeletons (exoskeletons).
Higher classification: Hexapoda
how would a map of a galaxy be different from a map of a city?
Answer:
A map of the galaxy would be a lot bigger and have a lot more names such as planets, stars, etc. While a city would be more basic than a whole galaxy.
Pls help match the following
Answer:
citric acid = orange
I know the answer for this only..
Plz answer will give BRAINLIEST! Promise! Question is in picture! Due in 5 minutes!!
Answer:
try A
Explanation:
Maya made this picture to represent a chemical reaction:
Which of the following statements best explains the type of chemical reaction represented by Maya's picture?
It is neither a synthesis reaction nor a decomposition reaction because two reactants form two products.
It represents a decomposition reaction because two reactants break apart and form two products.
It is neither a synthesis reaction nor a decomposition reaction because the total mass of the products is less than the total mass of the reactants.
It represents a synthesis reaction because the same atoms are present in the reactants and products.
Answer:
It is neither a synthesis reaction nor a decomposition reaction because two reactants form two products.
Explanation:
This reaction would be considered a single replacement reaction.
The chemical reaction involves the products and the reactants. The image is neither synthesis nor decomposition as the two products are formed from two reactants. Thus, option A is correct.
What is a chemical reaction?A chemical reaction includes the chemical interaction between the reactants to yield the products. In a synthesis reaction, two reactants interact to produce a different molecule or compound.
In a decomposition reaction, a reactant undergoes splitting to produce products and energy. But in the image two reactants produces two products that neither of the reaction shows.
This type of reaction is seen as the single replacement reaction where the more reactive element displaces the less reactive from the compound to form the new molecule.
Therefore, option a. Maya's picture represents a single replacement reaction but not a synthesis or decomposition reaction.
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