Taking into account the Gay Lussac's law, the pressure in the backup tank at -183 °C is 270 mmHg.
Gay Lussac's lawGay Lussac's law establishes the relationship between the temperature and pressure of a gas when the volume is constant.
This law says that the pressure of the gas is directly proportional to its temperature: when there is a constant volume, as the temperature increases, the pressure of the gas increases. And when the temperature is decreased, gas pressure decreases.
Mathematically, Gay-Lussac's law states that the ratio between pressure and temperature has the same value:
[tex]\frac{P}{T} =k[/tex]
Studying an initial state 1 and a final state 2, it is fulfilled:
[tex]\frac{P1}{T1} =\frac{P2}{T2}[/tex]
Pressure in the backup tankIn this case, you know:
P1= 900 mmHgT1= 27 C= 300 K (being 0C= 273 K)P2= ?T2= -183 C= 90 KReplacing in the Gay-Lussac's law:
[tex]\frac{900 mH}{300 K} =\frac{P2}{90 K}[/tex]
Solving:
[tex]P2=90K\frac{900 mH}{300 K}[/tex]
P2=270 mmHg
Finally, the pressure in the backup tank at -183 °C is 270 mmHg.
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How many grams of ammonium sulfate can be produced if 2500.0 g of H2SO4 react with excess NH3 according to the equation 2NH3(aq) + H2SO4(aq) → (NH4)2SO4(aq)? Calculate the percent yield if 3100 g (NH4)2SO4 were actually produced.
-Calculate the theoretical yield of ammonium sulfate.
-Calculate the percent yield for the associated question
-Write the unit for the theoretical yield (see related question)
If 2500 grams of H2SO4 react with excess NH3 according to the illustration, the amount of ammonium sulfate that can be produced would be 3,370.92 grams. If only 3100 grams of ammonium sulfate were produced, the percentage yield would be 91.96%.
Stoichiometric calculationsFrom the equation of the reaction:
2NH3(aq) + H2SO4(aq) → (NH4)2SO4(aq)
The mole ratio of H2SO4 and (NH4)2SO4 is 1:1
Mole of 2500 grams H2SO4 = 2500/98 = 25.51 moles
Equivalent mole of (NH4)2SO4 = 25.51 moles
Mass of 25.51 moles (NH4)2SO4 = 25.51 x 132.14 = 3,370.92 grams
If 3100 g of (NH4)2SO4 were actually produced, the percentage yield would be:
Percent yield = 3100/3370.92 x 100 = 91.96%
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Hi can someone please help me find the average for these temperatures? I need them asap
Answer:
55 degrees F - cold water
120 degrees F
the last on I don't know
help! this is science, Palmas is closer to the equator than Neuquén. Which location has a warmer air temperature and why?
Answer:
Palmas, because more energy is transferred from the sun directly to the surface and then from the surface to the air.
Explanation:
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Denatured alcohol vs isopropyl alcohol for cleaning.
Denatured alcohol and isopropyl alcohol are as similar as they as different. They are both used for cleaning and harmful to people if ingested. But isopropyl seems to be more effective than denatured alcohol. Denatured alcohol has been found to be more toxic and can harm our skin. But when it comes to cleaning, denatured alcohol can be used, but should not be used over isopropyl as it can leave behind residue, especially when it comes to electronic devices. Isopropyl, especially 70%, is more effective because it has more water, which can help it dissolve more slowly, penetrate cells, and kill bacteria.
Since helium is lighter than air, it is difficult to measure the mass of a sample, so to find out the mass of helium in a birthday balloon, a student transferred the helium to a fixed 1. 50 l vessel at 25. 0 °c and found the pressure to be 3. 04 atm. What mass of helium is in the balloon in grams?.
A 1.50-L vessel is filled with helium at 25.0 °C and 3.04 atm. Under these conditions, the mass of helium is 0.744 g.
What is an ideal gas?An ideal gas is that whose particles have negligible volume and intermolecular forces.
A 1.50 L vessel at 25.0 °C contains He at a pressure of 3.04 atm.
Step 1. Convert 25.0 °C to Kelvin.We will use the following expression.
K = °C + 273.15 = 25.0 + 273.15 = 298.2 K
Step 2. Calculate the moles of He.We will use the ideal gas equation.
P × V = n × R × T
n = P × V / R × T
n = 3.04 atm × 1.50 L / (0.0821 atm.L/mol.K) × 298.2 K = 0.186 mol
Step 3. Calculate the mass of He.The molar mass of He is 4.00 g/mol.
0.186 mol × 4.00 g/mol = 0.744 g
A 1.50-L vessel is filled with helium at 25.0 °C and 3.04 atm. Under these conditions, the mass of helium is 0.744 g.
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Why would a scientist need to know if there was a volcanic eruption about to happen?
what are the hydrogen ion and hydroxide ion concentrations in water? what is the pH and pOH of pure water?
Answer:
The pH of pure water is 7, the negative logarithm of 1 X 10-7. A neutral solution is one that is neither acidic nor basic. The hydrogen ion concentration equals the hydroxide ion concentration, and both equal 1 X 10-7 M. In a neutral solution, then, pH = pOH = 7.
Explanation:
The hydrogen ion concentration equals the hydroxide ion concentration, and both equal to [tex]1 X 10^{-7}[/tex] M. Hence, in a neutral solution, then, pH = pOH = 7.
What is pH?pH is a quantitative measure of the acidity or basicity of aqueous or other liquid solutions.
pOH is calculated by taking negative logarithm of hydroxide ion concentration.
The pH of pure water is 7, the negative logarithm of [tex]1 X 10^{-7}.[/tex]
A neutral solution is one that is neither acidic nor basic.
The hydrogen ion concentration equals the hydroxide ion concentration, and both are equal to [tex]1 X 10^{-7}[/tex] M.
Hence, in a neutral solution, then, pH = pOH = 7.
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Please help
AB+C<— A+CB
—>
Question 1: Imagine that the reaction starts with 100 molecules of reactants and zero molecules of products. Explain why the amount of reactants will never reach zero.
Question 2: imagine that the reaction starts with 0 molecules of reactants and 100 molecules of products. Will the amount of products increase or decrease as the reaction proceeds? Explain.
The rate of forward reaction equal to the rate of reverse reaction hence the amount of reactants will never reach zero.
Chemical reactionA chemical reaction involves the combnation of two or more species to yiled products. We must know that a point is always reached in a reaction when the rate of forward reaction equal to the rate of reverse reaction hence the amount of reactants will never reach zero.
Also, if the reaction starts with 0 molecules of reactants and 100 molecules of products, the amount of products will decrease overtime.
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A person sitting in a rolling chair at rest throws a basketball forward. Since the person and the rolling chair have a greater mass than the basketball, how will the person and the rolling chair respond?
They will have the same forward momentum as the basketball.
They will move backward at a lower speed than the basketball moves forward.
They will move backward at a higher speed than the basketball moves forward.
They will travel the same distance as the basketball travels but in the opposite direction
They will move backward at a lower speed than the basketball moves forward.
Conservation of linear momentumThe principle of conservation of linear momentum states that the sum of the initial momentum is equal to sum of final momentum.
Initial momentum = Final momentum
The forward momentum of the basketball = Backward momentum of the person and the chair
Since the mass of the person and the chair is greater than the mass of the basketball, the person and the rolling chair will move backward at a lower speed than the basketball moves forward.
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what is the purpose of the lab ? PLSSS HELPPPPP
Answer:
To keep apparatus, chemicals and carry out experiments
Which of the following is an oxidation-reduction reaction? so2(g) h2o(l) right arrow. h2so3(aq) caco3(s) right arrow. cao(s) co2(g) ca(oh)2(s) h2co3(l) right arrow. caco3(aq) 2h2o(l) c6h12o6(s) 6o2(g) right arrow. 6co2(g) 6h2o(l)
The reaction which shows oxidation and reduction simultaneously is C₆H₁₂O₆(s) + 6O₂(g) → 6CO₂(g) + 6H₂O(l).
What are redox reactions?Those reaction in which oxidation as well as reduction of substances takes place simultaneously will known as redox reactions.
SO₂(g) + H₂O(l) → H₂SO₃(aq)CaCO₃(aq) → CaO(s) + CO₂(g)Ca(OH)₂(s) + H₂CO₃(l) CaCO₃(aq) + 2H₂O(l)Above reaction are not the redox reactions as in these reaction oxidation and reduction simultaneously not takes place.
C₆H₁₂O₆(s) + 6O₂(g) → 6CO₂(g) + 6H₂O(l)In the above reaction reduction of oxygen takes place as its oxidation state changes from 0 to -2, and at the same time oxidation of carbon takes place as its oxidation state changes from 0 to +4.
Hence correct option is (4).
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Answer:
correct option is (4).
Explanation:
PLS HURRRRRRRRYYYY!!!!
Research a type of plant tropism not presented in the lessons. Create a meme below that name and describes the tropism.
In an ecosystem, plant tropism represented is phototropism which is towards the direction of light.
What is an ecosystem?Ecosystem is defined as a system which consists of all living organisms and the physical components with which the living beings interact. The abiotic and biotic components are linked to each other through nutrient cycles and flow of energy.
Energy enters the system through the process of photosynthesis .Animals play an important role in transfer of energy as they feed on each other.As a result of this transfer of matter and energy takes place through the system .Living organisms also influence the quantity of biomass present.By decomposition of dead plants and animals by microbes nutrients are released back in to the soil.
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A film crew is setting up a scene to show the effects of a blast wave on nearby cars. Why do you think the cars are hanging from cables?
The cars are hanging from cables so that there is presence of more medium of propagation to make it look real.
What is a Blast wave?This is referred to as a violent propagating disturbance, produced by an explosion in air.
Hanging the cars in the air will ensure an accurate description of the effect of the blast wave on them.
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The strongest forces of attraction occur between molecules of
Answer:
Dipole-dipole
- are the strongest intermolecular force of attraction.
Explanation:
Yun lang <3
Qi/ a cargo ship travels at an average speed of 20m/s. how long will it take to travel between two
ports which are 1000km apart?
Answer:
50000 seconds
Explanation:
Classic dimensional analysis question!
[tex]\frac{1000\text{km}}{20\text{m/s}} * \frac{1000\text{m}}{1\text{km}}=50000\text{s}[/tex]
Convert 7.6 × 105 cal to kiloJoules
19.5 g of NaCl occupy a volume of 29.5 mL. What is the molarity of the solution?
Round your answer to 1 decimal space, even if sig figs are not conserved.
(Please answer quickly)
Answer:
11.3 M
Explanation:
Na = 22.989 gm/mole
Cl = 35.45 gm/mole so Na Cl = 58.439 gm/mole
(19.5 / 58.439 )/ (29.5/1000) = 11.3 M
What happens when a dendritic cell detects a pathogen?
the dendritic cell will cause agglutination of the pathogen cells
the dendritic cell consumes the pathogen by phagocytosis...
the dendritic cell secretes antibodies
the dendritic cell will produce immunoglobin
Answer:
the dendritic cell consumes the pathogen by phagocytosis
WE DO: The mechanism shown here is proposed for the reaction:
2A → 2B + C
2A k1↔ B + D (Fast, equilibrium)
B + D k-1→ E + C (Slow)
E → 2B (Fast)
Propose a rate law consistent with the mechanism.
Please show and explain everything.
Based on the mechanism shown above, the correct rate law that is consistent with the sample reaction is [tex]B+D \rightarrow ^{k_{-1}} E+C[/tex].
What is the rate law?Rate law can be defined as a chemical equation that is used to relate the initial (forward) chemical reaction rate with respect to the concentrations of both the chemical reactants and constant parameters.
Mathematically, the rate law is given by this formula:
[tex]R = K[A]^x[B]^y[C]^z[/tex]
Where:
k is the rate constant.A is the concentration of reactant A.B is the concentration of reactant B.C is the concentration of reactant C.x, y, and z are the order of the reaction.Based on the mechanism shown above, the correct rate law that is consistent with the sample reaction is as follows:
[tex]B+D \rightarrow ^{k_{-1}} E+C[/tex]
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Name and Describe two properties of water that’s important to life on earth
"The Univeral Solvent"
- Water is known to be the universal solvent because of its ability to dissolve more particles than any other liquid.
Cohesion- Cohesion is the property of water to attract other molecules. This helps in making solutions that are essential for most life to propagate.
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The complement system of defense is composed of proteins that are always present in the blood. Which statement describes the importance of this system in early pathogen defense?
It recognizes specific common pathogens.
It rapidly lower the blood pH.
It causes immediate pathogen lysis.
It does not have to be activated by antibodies.
Answer:
The answer is It recognizes specific common pathogens. :)
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all in a day's work cryptogram
Answer:
yup!
Explanation:
i dont know what else to say.
state 3 commercial uses of oxygen
Answer:
Brainliest Please !!!!!
Can someone please help me?? :(
Answer:
A and B is the answer
Answer:
option b
Explanation:
Explain the difference between current electricity and magnetism.
Calculate: Describe the RGB value and color you would obtain with each combination described below. Use the Gizmo to check your answers.
RGB value Color
Yellow (255, 255, 0) and blue (0, 0, 255) ______________ ______________
Plum (120, 0, 120) and dark green (0, 120, 0) ______________ ______________
Teal (0, 90, 90) and bronze (185, 150, 0) ______________ ______________
In the RGB color model, each color is represented by a numerical code that is written in parentheses and separated by commas.
What is the RGB model?RGB is a color model with which it is possible to represent a color by mixing by adding the three primary colors of light.
A special feature of this model is that it is not a reference point for defining the color red, green, or blue because the same RGB values can display noticeably different colors on different devices.
To form a color, it must be taken into account that in the RGB model the incidence of each color (red, green or blue) is measured on a scale that goes from 0 to 255.
These values are represented in parentheses, separated by commas as shown in the image below:
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A scientist produces zinc iodide (zni2). (a) calculate the minimum mass of zinc that needs to be added to 0.500 g of iodine so that the iodine fully reacts. the equation for the reaction is: zn + i2 ⟶ zni2 relative atomic masses (mr): zn = 65 i = 127
The minimum mass of Zinc, Zn that needs to be added to 0.500 g of iodine so that the iodine fully reacts is 0.128 g
Balanced equationZn + I₂ —> ZnI₂
Molar mass of Zn = 65 g/mol
Mass of Zn from the balanced equation = 1 × 65 = 65 g
Molar mass of I₂ = 127 × 2 = 254 g/mol
Mass of I₂ from the balanced equation = 1 254 = 254 g
SUMMARY
From the balanced equation above,
254 g of I₂ required 65 g of Zn
How to determine the mass of Zn neededFrom the balanced equation above,
254 g of I₂ required 65 g of Zn
Therefore,
0.5 g of I₂ will require = (0.5 × 65) / 254 = 0.128 g of Zn
Thus, the minimum mass of Zn required is 0.128 g
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Determine the ph of a 0. 188 m nh3 solution at 25°c. The kb of nh3 is 1. 76 × 10-5.
[tex]\tt [OH^-]=\sqrt{Kb.M}[/tex]
[OH⁻]=√1.76.10⁻⁵.0.188
[OH⁻]=1.81 x 10⁻³
pOH = 3 - log 1.81
pH = 11 + log 1.81
Ivana is studying insect life cycles. She placed a male and a female gnat inside a terrarium. The female gnat laid eggs. Ivana observed and recorded all of the stages she saw the eggs go through. Her results are shown in the table below.
Answer:
B. A gnat completes its life cycle in about 1 month.
Explanation:
Stage Time in Stage
egg 24 hours
larva 7 days
pupa 6 days
adult 2 weeks
Which of the following is a valid conclusion that Ivana can draw from her data?
A. Agnat generally does not live for more than 1 week.
B. Agnat completes its life cycle in about 1 month.
C. Agnat life cycle has more than five stages.
D. Agnat is a crustacean, not an insect.
Complete and balance the following equation K+H2O
Explanation:
hello
2K + 2H2O ==》2KOH + H2