Based on the data provided;
number of moles of helium gas is 1.25 molespressure at peak temperature is 259.3 kPainternal pressure is above 256 kPa, therefore, the balloon will burst.pressure should be reduced to a value less than 256 kPa by reducing the temperatureWhat is the ideal has equation?The ideal gas equation relatesthe pressure, volume, moles and temperature of a gas.
The moles of helium gas is calculated using the Ideal gas equation:
PV = nRTn is the number of moles of gas
R is molar gas constant = 8.314 L⋅kPa/Kmol
P is pressure = 239 kPa
T is temperature = 21°C = 294 K
V is volume = 12.8 L
Therefore;
n = PV/RT
n = 239 × 12.8 / 8.314 × 294
n = 1.25 moles
The number of moles of helium gas is 1.25 moles
At peak temperature, T = 46°C = 319 K
Using P1/T1 = P2/T2
P2 = P1T2/T1
P2 = 239 × 319/294
P2 = 259.3 kPa
The pressure at peak temperature is 259.3 kPa
At 42°C, T = 315 K
Using P1/T1 = P2/T2
P2 = P1T2/T1
P2 = 239 × 315/294
P2 = 256.07 kPa
Since the internal pressure is above 256 kPa, the balloon will burst.
The pressure should be reduced to a value less than 256 kPa by reducing the temperature.
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what type of energy transfer occurs as a coiled spring is released
Answer:
When a spring is coiled up or a rubber band is stretched, mechanical energy is stored in it. When the spring uncoils or the rubber band snaps back, this energy is released. This stored mechanical energy is called potential energy because it has the potential to make things happen.Explanation:
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lemon and amla have a sour taste. why
Answer:
They both contain citric acid.
Explanation:
Citric acid is sour and is found in citrus fruits such as lemon and amla. Acids usually have a sour taste and therefore lemon and amla are sour.
Select the correct answer. Which statement about cellulose is true? A. It’s a synthetic polymer. B. It’s a raw material used to make plastic. C. It’s produced using oil and gas. D. It’s used to make paper products.
Answer:
It's used to make paper.
Explanation:
Plato answer.
A cube of sugar has the length of one side 4cm.find its volume
Answer:
64
Explanation:
since it's a cube all sides are equal
and to calculate volume you multiply the length by the hieght by the width
If you transfer energy into two substances which one would melt first
Answer:
The substance with a weaker molecular attraction
What must occur before a newly made polypeptide is secreted from a cell?.
Answer: Your answer is Its signal sequence must target it to the ER, after which it goes to the Golgi.
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How does carbon dioxide affect the Earth's climate?
Question 17 options:
Carbon dioxide is being added to the soil, which causes weather phenomenon.
Carbon dioxide mixes with water vapor to take harmful chemicals out of the air.
While carbon dioxide is in the air waiting to be reabsorbed it traps the sun's heat.
Answer:
While carbon dioxide is in the air waiting to be reabsorbed it traps the sun's heat.
Radiant energy is emitted from all objects with temperatures greater than ____________. This means ____________ objects emit radiant energy.
Radiant energy is emitted from all objects with temperatures greater than ABSOLUTE ZERO. This means ALL objects emit radiant energy.
Radiant Heat and TemperatureRadiant heat is a type of energy that largely depends on the temperature of an object.
This type of energy (radiant energy) is emitted from all objects and can be observed when heat is absorbed on the surface of another material.
Radiant energy can be defined as a type of electromagnetic energy.
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Copper(I) nitrate, CuNO3, is dissolved in water and forms a transparent, blue mixture. What type of mixture is it
According to the Law of Conservation of Matter, what happens to atoms of gas in a balloon when it is placed in the freezer?
the number of atoms stays the same and the energy stays the same, keeping the volume the same
the number of atoms stays the same as the atoms lose energy to the colder freezer, slow down, get closer together, shrinking the volume
the number of atoms increases, causing an increase in energy and an increase in volume
the number of atoms decreases, which takes up less space and decreases the volume
Answer:
the number of atoms stays the same as the atoms lose energy to the colder freezer, slow down, get closer together, shrinking the volume
Explanation:
When a liquid is cooled, the average energy of the molecules decreases. At some point, the amount of heat removed is great enough that the attractive forces between molecules draw the molecules close together, and the liquid freezes to a solid.
I hope it helps.
does this image show a physical or chemical change?
Answer:
Physical
Explanation:
When a substance changes from liquid to gas it's a physical change. There is no chemical reaction between the rubbing alcohol or anything else that would change it's chemical composition.
What happens to the freezing temperature of a solvent when a
solute is dissolved into it?
a It is unaffected.
b It increases
Clt decreases.
d It either increases or decreases
Answer:it decreases
Explanation:
How many grams of sodium hydroxide needed to be obtained in order to get 1.7 x 1024 molecules NaOH?
Answer:
n order to get that molecule you hgave to go into atoms like the skin of of it.... I'm just trying to sound smartI
Explanation:
What would be the advantage of using a molecular model.
Answer: Can pick it up and hold it, can rotate groups about bonds
and can look for symmetry
Explanation: A molecular model is a plastic model with interchangeable balls. Represents molecules and their processes.
The creation of mathematical models of molecular properties and behavior is molecular modelling, and their graphical depiction is molecular graphics, but these topics are closely linked and each uses techniques from the others.
5. The excited players celebrated because they won the game. 6. Everyone at the birthday party ate the delicious birthday cake.
Answer:
5. The excited players celebrated because they won the game. 6. Everyone at the birthday party ate the delicious birthday cake is the question
Explanation:
Girls are usually completely physically mature by _____ years old. A. 17 B. 19 C. 14 D. 21.
Answer:
A. 17
Explanation:
Took the test on Edge & got 100% :D
What does an electrically neutral atom have the same number of?
protons and electrons
protons and neutrons
electrons and neutrons
protons, electrons, and neutrons
Answer:
it has an equal number of negative electric charges (the electrons) and positive electric charges (the protons).
Explanation:
So in all of the answers it would be A. Protons and Electrons
Which statement best describes the characteristics of the Sun?
Red in color
at the center of our galaxy
Hotter than most stars
medium in size
A sample of hydrogen exerts a pressure of 0.429 atm at 50.00°C. The gas is heated to
95.00°C at a constant volume. What will its new pressure be?
Answer:
5.847atm
Explanation:
according to Gay- Lussac's law
P1/T1 =P2/ T2
How are the angles and side lengths within triangle related?
Answer:
Explanation:
if the side lengths of a triangle are equal then the angles opposite to those sides are equal . This is a case of an isosceles triangle .
And if all the sides of a triangle are equal then all the angles of a triangle will be equal . This is a case of an equilateral triangle.
Bile salts play a crucial role in gastrointestinal homeostasis and digestion. Which phrase is the BEST description of the gastrointestinal function of bile salts?
Answer:
bile salts emulsify fats and break them down into smaller particles which gives the enzyme lipase a greater surface area to act on during digestion of fats.
Explanation:
What color of light is emitted from an excited hydrogen atom where the electron has been promoted to n
Answer:
n1 = 2, n2 = 4
1/wavelength = 1.097*10^7[1/2^2 — 1/4^2]
1/wavelength =0.20568*10^7
wavelength = 486.192*10^-9 Or
wavelength = 486.19 nm (blue color)
Explanation:
I just answered this in class
[WILL MARK BRAINLIEST!!] Describe the relationship between molecular structure and the strength of electrostatic
forces between molecules. How does this impact boiling and melting points?
Answer:
increase the bonding strength between two or more molecules
hope this help
Explanation:
Boiling points and melting points
The overarching principle involved is simple: the stronger the noncovalent interactions between molecules, the more energy that is required, in the form of heat, to break them apart. Higher melting and boiling points signify stronger noncovalent intermolecular forces.
Jim's car travels 60.2 meters in 5 seconds. Tara's car travels 72 in 6 seconds. What is the speed for each car? Whose car travels fastest?
Answer:
Jim's car travels: 12.04 meters per second.
Tara's car travels 12 meters per second.
Explanation:
Tara's car travels the fastest.
What are two basic categories of matter
What is the molecular formula for a compound that is 46.16% carbon, 5.16% hydrogen and 48.68% fluorine if the molar mass of this compound is 156.12 g?
C6H8F4
C5H10F5
C6H6F3
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ANSWER THE FOLLOWING QUESTIONS
Explain what is a solar eclipse and why they are so rare IN YOUR OWN WORDS
Explain what is a lunar eclipse and why the moon turns red, and why it's more common IN YOUR OWN WORDS
Answer:
This is true: Lunar eclipses happen more often. I think it's just a question of how big the shadows are: There is a lunar eclipse when the Earth blocks the Moon's light from the Sun. 7000 km away from the Moon, the Earth's shadow is about two lunar diameters wide. Much wider than a pancake. The reason that the moon turns red, is due to Earth's atmosphere. It bends red rays of sunlight into our planet's shadow and scatters out blue rays of light.
When the Moon casts a shadow on the Earth, it is called a solar eclipse. The Moon is a lot smaller now, and its shadow is also a lot smaller than it was before. Around 200 or 300 km across is how big the Moon's shadow is when it's far from the Earth.
Fun Facts:
- The 21st century has 224 solar eclipses and 230 lunar eclipses (all varieties of each combined)
Elements on the right side of the periodic table are called.
Answer:
Nonmetals is the answer!
Hope this helped!
Answer:
NONMETALS. :)
Explanation:
im in sixth btw.
what is 37degrees Celsius in Si units
Answer:
310.15 Degrees Kelvin
Explanation:
37 Degrees Celsius = 310.15 Degrees Kelvin = 98.6 Degrees Fahrenheit
Conversion Factor from Celsius to kelvin
or 37 + 273 = 310 Degrees Kelvin
The electron configuration of element Y ends in s?p4. What is
the symbol for the ion most commonly formed by this element?
a y2+
b y2-
с ү6+
d Y
This problem is providing us with the end of the electron configuration an element as s²p⁴ and asks for the most commonly formed ion. At the end, the answer is b Y²⁻.
Electron configurationIn chemistry, when analyzing electron configurations, one must first take into account how the energy levels must be filled with electrons.
Now, note the problem states that the electron configuration ends by s²p⁴, which means it is closer to complete the octet so it needs two electrons in order to do so, as it behaves as a nonmetal.
Therefore, the most commonly ion formed by this element is Y²⁻, because of the fact that it needs two electrons to complete the octet and thus become chemically stable and likely to bond with a metal.
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