Answers
Answer: The initial volume of gas was \(282cm^3\)
Explanation:
Charles's Law: This law states that volume is directly proportional to temperature of the gas at constant pressure and number of moles.
\(V\propto T\) (At constant pressure and number of moles)
\(\frac{V_1}{T_1}=\frac{V_2}{T_2}\)
where,
\(V_1\) = initial volume of gas =?
\(V_2\) = final volume of gas = \(212cm^3\)
\(T_1\) = initial temperature of gas = \(122.0^0F=323.15K\)
\((32^0C=273.15K)\)
\(T_2\) = final temperature of gas = \(-23.0^0F=242.59K\)
\(\frac{V_1}{323.15}=\frac{212}{242.59}\)
\(V_2=282cm^3\)
Therefore, the initial volume of gas was \(282cm^3\)
Related Questions
The total number of atoms in 3.75 mol of ammonium nitrate, NH4NO3 , is
Answers
The total number of atoms in 3.75 mol of ammonium nitrate, NH4NO3, is equal to the Avogadro's number, which is 6.022 x 10^23, times the number of moles, which is 3.75 in this case.
Thus, the total number of atoms in 3.75 mol of ammonium nitrate is equal to 2.26 x 10^24 atoms.
This number can be further broken down into the number of atoms of each element present in the compound. Ammonium nitrate is composed of two elements, nitrogen (N) and hydrogen (H). For each mole of ammonium nitrate, there are 4 moles of hydrogen atoms and 2 moles of nitrogen atoms.
Therefore, in 3.75 moles of ammonium nitrate, there are 15 moles of hydrogen atoms and 7.5 moles of nitrogen atoms, which is equal to 9 x 10^24 hydrogen atoms and 4.05 x 10^24 nitrogen atoms.
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Convert 5.50 mol of MgO to g.
Answers
Answer:
5.50 moles of magnesium oxide is 221.6742 grams
Explanation:
to do this you multiply the number of moles by the molar mass
3.50 grams of an unknown metal was placed in a graduate cylinder containing 50.0
mL water initially. What is the density of this unknown metal if the final reading from
the graduate cylinder was 65.0 mL?
Answers
For 3.50 grams of an unknown metal was placed in a graduate cylinder containing 50.0mL water initially, the density of this unknown meta is mathematically given as
D= 0.23 g/ml
What is the density of this unknown metal if the final reading from the graduate cylinder was 65.0 mL?Generally, the equation for the Volume of water is mathematically given as
Vw= Volume of water after metal addition - Volume of water initial
Therefore
Vw = 65 ml - 50 ml
Vw= 15 ml
In conclusion,
D= Mass of metal / Volume
D= 3.5 / 15
D= 0.23 g/ml
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18. What is the evidence and reasoning that supports the claim that Earth's magnetic field is
generated bt motion of liquid metal, and not a permanent, solid magnet deep inside Earth.
Answers
Answer:
The inside of the Earth is too hot to hold a solid magnet therefore, there is liquid metals within the mantle and deeper. These metals flow around causing volcanic eruptions, earthquakes, and Earth's magnetic field.
Explanation:
Is it true or false?
Answers
Answer:
True
Explanation:
Burning waste can lead to air pollution and release of greenhouse gases. Carbon dioxide is one of those gases.
What are two ways to restore the buffering ability of a solution of
Answers
Answer
Based on Le Chatelier's principle, the buffering capacity of a buffer that has already neutralized a significant acid amount can be replenished if the concentration of the base is increased. This will allow the base's OH- ions to neutralize further of the acid's H+ ions.
Explanation
Le Chatelier's principle states that if the equilibrium of a chemical reaction is disturbed by changing the conditions such as pressure, temperature, or concentration of products or reactants, the position of equilibrium shifts to counteract the change to re-establish the equilibrium.
Applying this principle to a buffer that has already neutralized a significant amount of acid, we should increase the base's concentration to re-establish the equilibrium. That will allow OH- ions of the base to neutralize further H+ ions of the acid.
Which of the following is a possible
way to describe the SO3 component in
the reaction below?
Sa(s) + 120₂(g) → 8SO3(g)
A. 8 atoms SO3
B. 8 molecules SO3
C. 80.07g SO3
D. 32 LSO3
Answers
The correct answer is B. 8 molecules \(SO_3\). Option B
In the given reaction:
S(s) + \(O_2\)(g) → \(SO_3\)(g)
The stoichiometric coefficient in front of the \(SO_3\)molecule is 8, which indicates that 8 molecules of \(SO_3\)are formed as a product. This coefficient represents the ratio of the number of molecules involved in the reaction.
Option A (8 atoms \(SO_3\)) is incorrect because it only mentions the number of atoms, not molecules. The stoichiometric coefficient does not represent the number of atoms, but rather the number of molecules.
Option C (80.07g \(SO_3\)) is incorrect because it mentions a specific mass. The stoichiometric coefficient does not directly represent the mass of the substance, but rather the relative amount of molecules involved in the reaction.
Option D (32 \(SO_3\)) is incorrect because it mentions a specific volume. The stoichiometric coefficient does not directly represent the volume of the substance, but rather the relative amount of molecules involved in the reaction.
Therefore, the correct way to describe the \(SO_3\)component in the reaction is option B: 8 molecules \(SO_3\). This represents the ratio of the number of molecules of \(SO_3\)that are produced in the reaction.
Option B
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What is the experimental mole ratio of baking soda (NaHCO3 ) to sodium chloride (NaCl)?
Answers
Answer: 1:1
Explanation:
Since Na trades place with Na it makes it 1:1
The passage's author most vividly conveys the sense that Plumpp's poetry is like music when he
O uses words like "swing," "dance," and "sway" to characterize phrases in Plumpp's poems
O defines Plumpp as "the poet laureate of Chicago jazz and blues"
explains how long Plumpp has been writing about "Chicago jazz giants"
urges people to read Plumpp's poems and listen to the music Plumpp "immortalizes in print"
Answers
It is an amine, and it has less polar nitrogen-hydrogen and oxygen-hydrogen bonds.
A compound's boiling point is a physical characteristic. These intramolecular linkages between the molecules that make up a chemical affect these physical characteristics.
Alcohols and amino acids have the same kind of intermolecular linkages. The hydrogen bond is the name of this kind of bond.
The electrical attraction between a hydrogen atom from one molecule and an electronegative atom from a nearby molecule is known as a hydrogen bond.
The strength of the bond is in the following order: H.....F > H.....O > H......N
The H....N hydrogen bonds exist in amines, whereas the H....O hydrogen bonds exist in alcohols.
Consequently, the alcohol's hydrogen bonds are stronger and it will impart a higher boiling point on the compound.
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Answer:uses world like
Explanation:
10. What is the name of the acid with the formula HCIO?
Answers
Answer:
THE NAME OF THE ACID WITH FORMULA HCIO IS HYPOCHLOROUS ACID
Where would a 5-kg object experience that greatest gravitational force?
A. on the moon
B. at the bottom of the ocean
C. at the top of a tall mountain
D. at sea level
Answers
A 5-kg object experiences the greatest gravitational force at sea level. The correct option is D.
What exactly is a scientific force?The term force has a particular definition in science. At this standard, it is perfectly acceptable to refer to a force as both a push and maybe a pull. A force is not one that an object possesses or possesses. Another object applies a force to another. The concept of a force is not restricted to living or non-living things.
What exactly is balanced force?
Balance occurs when the forces applied have similar strengths & act in opposite directions. These forces cancel each other out, and the movements of the object on which they act remain unchanged. The correct option is D.
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Which of the following is a consequence of humans using fossil fuels?
O A. All of these
B. Rising sea level
C. Destruction of habitats
D. More severe storms
Answers
8. Jill conducted an experiment to investigate which plant food would make her
plants grow faster. She tried four different plant foods on plants of the same
type and age. Jill concluded that the plant that was fed Brand A grew the
fastest. Jill did not realize that the plant that was fed Brand A also received
more sunlight. (SC.7.N.1.5.3)
What error did Jill make in her experiment?
a) She used the wrong kind of plant.
b) She used too much plant food.
c) She did not control the variables.
Answers
In her experiment, Jill did not take into account the fact that the plant that was fed Brand A also received more sunlight. This means that there is another variable, besides the plant food, that could have affected the growth rate of the plant. By not controlling this variable, Jill's conclusion that Brand A was the best plant food may not be accurate. To properly control variables and make a valid conclusion, Jill should have ensured that all plants received the same amount of sunlight, or use other methods to control this variable as well.
Trend of atomic number and atomic size of the elements when we move from left to right in different periods of periodic table
Answers
Answer:
The atomic size decreases with an increase in atomic number when we move from left to right.
Explanation: Hope it helps you:))))))
Have a great day.
The fluorocarbon compound C2Cl3F3 has a normal boiling point of 47.6 °C. The specific heat of this compound in the liquid state is 0.91 J/g-K and in the gas state is 0.67 J/g-K. The heat of vaporization is 27.5 kJ/mol. What is the amount of heat required to convert 5.6 g of the compound from a liquid at 30.0 °C to a gas at 60.5 °C?
Answers
The amount of heat required to convert 5.6 g of the compound from a liquid at 30.0 °C to a gas at 60.5 °C is approximately 1.183 kJ.
To calculate the amount of heat required to convert 5.6 g of the compound from a liquid at 30.0 °C to a gas at 60.5 °C, we need to consider the heat required for temperature change and the heat of vaporization.
First, let's calculate the heat required for the temperature change from 30.0 °C to the boiling point of 47.6 °C in the liquid state:
q1 = mass * specific heat * temperature change
= 5.6 g * 0.91 J/g-K * (47.6 °C - 30.0 °C)
= 81.23 J
Next, let's calculate the heat required for the phase change from liquid to gas:
q2 = heat of vaporization * number of moles
= 27.5 kJ/mol * (5.6 g / molar mass)
= 27.5 kJ/mol * (5.6 g / 146.39 g/mol)
= 1.051 kJ
Finally, let's calculate the heat required for the temperature change from the boiling point to 60.5 °C in the gas state:
q3 = mass * specific heat * temperature change
= 5.6 g * 0.67 J/g-K * (60.5 °C - 47.6 °C)
= 51.02 J
The total amount of heat required is the sum of q1, q2, and q3:
q_total = q1 + q2 + q3
= 81.23 J + 1.051 kJ + 51.02 J
= 1.132 kJ + 51.02 J
= 1.183 kJ
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What is the frequency of visible light which has a wavelength of 625nm?
Answers
Answer:
The answer is 4.80 x 1014s-1b
Explanation:
625 nm x 10-9m= 6.25 x 10-7 m = c = 2.998 x 108m/s1 nm 6.25 x 10-7m=4.80 x 1014s-1b.)
The frequency of visible light is equal to 4.8 ×10¹⁴s⁻¹.
What are frequency and wavelength?Frequency can be described as the number of oscillations of a wave in a time of one second. The frequency of the wave or light has S.I. units which are per second (s⁻¹) or hertz.
Wavelength can be defined as the distance between the two adjacent points of a wave in the phase with each other. Two adjacent crests or adjacents troughs on a wave are separated by a distance is called wavelength.
The relationship between the speed of light, frequency, and wavelength is:
c = νλ
Given, the wavelength of the light, λ = 625nm = 625 × 10⁻⁹ m
Then we know that the speed of light, c = 3 × 10⁸ ms⁻¹
The frequency of the light can be calculated from the above-mentioned equation:
The frequency of the given visible light will be equal to:
ν = c/λ = 3× 10⁸ ms⁻¹/625 × 10⁻⁹ m = 4.8 ×10¹⁴ Hz
Therefore, the frequency of visible light is equal to 4.8 ×10¹⁴ Hz.
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[Cr{P(CH2CH3)3}6]2(SO4)3
Answers
How do we apply the Scientific Method to a Forensic investigation?
Answers
The forensic scientific method is a modified version of the scientific method that contrasts observable physical discoveries found at the crime scene, in the crime lab, or in the autopsy room with anamnestic evidence gathered by investigators.
How do crime scene investigations use the scientific method?To precisely reconstruct and establish the sequence of events leading up to a crime, forensic experts employ a variety of approaches. A person's innocence or guilt is then established in court using the physical evidence that was painstakingly acquired through the application of the scientific method.What role does the scientific method play?The Scientific Method is not the only, but it is the most well-known method for learning how and why things happen in the universe without having our understanding influenced by religious, political, or philosophical principles. This approach offers a way to create theories of explanation and ask questions about general observations.To learn more about forensic investigation visit:
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define saturated and unsaturated fats
Answers
Answer:
The human body needs both saturated fats and unsaturated fats to remain healthy. Most dietary recommendations suggest that, of the daily intake of fat, a higher proportion should be from unsaturated fats, as they are thought to promote good cholesterol and help prevent cardiovascular disease, whereas an overabundance of saturated fats is thought to promote bad cholesterol.
Explanation:
A 2.0 L tank contains 0.25 mol of argon. The pressure inside the tank is 387 torr. What is the
temperature of the gas?
Answers
The temperature of the gas is 0.49 K.
An ideal gas is a theoretical gas composed of many randomly transferring factor particles that aren't difficult to interparticle interactions. the best gasoline idea is beneficial because it obeys the precise gas law, a simplified equation of country, and is amenable to evaluation under statistical mechanics.
Volume is a degree of occupied three-dimensional space. it's far more frequently quantified numerically the usage of SI-derived gadgets or by way of diverse imperial gadgets. The definition of length is interrelated with the extent.
An ideal gas is described as one for which both the extent of molecules and forces between the molecules are so small that they have got no effect at the behavior of the gas. The real gas that acts almost like a really perfect gasoline is helium. that is due to the fact helium, in contrast to maximum gases, exists as an unmarried atom, which makes the van der Waals dispersion forces as low as viable
Using the ideal gas equation:-
Given;
P₁ = 387 torr = 0.509211 atm
V₁ = 2 L
mole n = 0.25 mol
T = ?
R = 8.314
PV = nRT
T = PV /nR
= 0.509211 × 2 / 0.25 × 8.314
= 0.49 K
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Causes warm air to rise in the atmosphere. is what type of heat transfer?
Answers
Answer: Convection
Explanation: Convection is the transfer of heat energy in a fluid. This type of heating is most commonly seen in the kitchen with a boiling liquid. Air in the atmosphere acts as a fluid.
A sample of SrCO3(s) is added to pure
water and allowed to come to equilibrium
at 25°C. The concentration of Sr²+ is 4.0 x
10-5 M at equilibrium. What is the value of
Ksp for SrCO₂?
Answers
The Ksp of SrCO3 is obtained as 1.6 * 10^-9.
What is the Ksp?The kind of salt used and the temperature of the solution both affect Ksp's value. It offers details on the maximum quantity of salt that can dissolve in the solvent under a specific set of circumstances.
A solution is referred to as supersaturated and the excess ions may precipitate out of solution if the concentration of the ions in it exceeds the value of Ksp.
We know that the Ksp for the SrCO3(s) can be obtained from;
Ksp = [Sr^2+] [CO3^2-]
Ksp = x^2
But [Sr^2+] = [CO3^2-] = 4 * 10^-5 M = x
Thus;
Ksp = (4 * 10^-5)^2
= 1.6 * 10^-9
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A gas has a pressure of 2.70 atm at 50.0 °C. What is the pressure at standard temperature (0°C)?
Answers
Answer:
2.282 atm
P1V1/T1 = P2V2/T2
2.70atm / (50+273) = X/ 273
make x subject of formula
:. X = 2.28 atm
or 2.28 * 1.01 *10⁵ N/m²
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Why do you think plant cells need a cell wall as well as a cell membrane?
Answers
Answer:
to protect it from harm
Explanation:
Which of the following is supported by reliable evidence?
A. Intelligent Design
B. Theory of Gravity
C. Detoxing
D. Homeopathy
Answers
Using atomic spectra selection rules for electronic excitations, determine the electron configurations and their associated term symbols for the two lowest-lying electronic excited states for a hydrogen atom. (Starting from the ground electronic state, determine what the two lowest energy electronic excitations are possible.) Indicate which will have the lower energy.
Answers
Answer:
Using atomic spectra selection rules for electronic excitations, determine the electron configurations and their associated term symbols for the two lowest-lying electronic excited states for a hydrogen atom. (Starting from the ground electronic state, determine what the two lowest energy electronic excitations are possible.) Indicate which will have the lower energy.
Explanation:
Using atomic spectra selection rules for electronic excitations, determine the electron configurations and their associated term symbols for the two lowest-lying electronic excited states for a hydrogen atom. (Starting from the ground electronic state, determine what the two lowest energy electronic excitations are possible.) Indicate which will have the lower energy.
Which of the following two combinations are correct?
Answers
Answer:
D
Explanation:
Copper has a more positive reduction potential than Hydrogen and is below Hydrogen in the reactivity series. So it can't displace H+ from diluted acids. Therefore Cu doesn't form Cu salt and a gas
Fe, Zn and Mg are above Hydrogen in the electrochemical series and can displace Hydrogen as follows
Fe(s) + 2HCl(aq) ----> FeCl2 +H2 (g)
Mg(s) + 2HCl(aq) ----> MgCl2 (aq) +H2 (g)
So iii is wrong
Zn(s) +2HCl(aq) ----> ZnCl2(aq) +H2 (g)
The chemical reaction that is produced by modelage masks causes:
Answers
Answer:
an increase in temperature
Explanation:
The chemical reaction that is produced by modelage masks causes: an increase in temperature
please help!!
62.4 mL of an H2SO3 solution
were titrated with 65.25 mL of a
0.235 M KOH solution to reach the
equivalence point. What is the
molarity of the H2SO3 solution?
Answers
The concentration of H₂SO₃ solution is equal to 0.123 M.
What is a neutralization reaction?A neutralization reaction is described as a reaction in which an acid and base react to form salt and water. When a strong acid will react with a base then the salt which is formed can be neither acidic nor basic.
When H₂SO₃ (a strong acid) reacts with KOH, the resulting salt is K₂SO₃ and water.
H₂SO₃ + 2KOH → K₂SO₃ + 2H₂O
Given, the concentration of KOH = 0.235 M
The volume of the KOH = 65.25 ml = 0.06525 L
The number of moles of KOH, n = M × V = 0.235 × 0.06525 = 0.0153 M
The volume of the H₂SO₃ = 62.4 ml = 0.0624 L
The number of moles of H₂SO₃, n = 0.0153/2 = 0.00767 mol
The concentration of H₂SO₃ =0.00767/0.0624 = 0.123 M
Therefore, the molarity of H₂SO₃ is 0.123 M.
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1. List 3 things that make it difficult for Mark to survive on Mars
2. Why did Nasa not want the crew to know that Mark was still alive?
3. How do you think Marks sense of humor helped him survive? Use 2 example from the movie
4. Explain how Mark is rescued.
Answers
Answer;
need more info.........
Explanation: