A fluorescent light tube has an internal volume of 400 cm and an internal pressure of 200 kPa.
It is filled with 0.03 moles of an ideal gas.
What is the temperature of the gas inside the fluorescent light tube?
A 3.21 x 10 K
B 3.21 x 10?K
с 3.21 x 105K
D 3.21 x 10K
with explanation plz
Answers
Answer:
Temperature of gas is 3.21×10² K
Explanation:
Given data:
Volume of bulb = 400 cm³ (400/1000 = 0.4L)
Pressure of bulb = 200 KPa (200/101= 1.974 atm)
Number of moles of gas = 0.03 mol
Temperature of gas = ?
Solution:
Formula:
PV = nRT
R = general gas constant = 0.0821 atm.L/ mol.K
1.974 atm × 0.4 L= 0.03 mol × 0.0821 atm.L/ mol.K × T
0.7896 atm.L = 0.002463 atm.L/K × T
T = 0.7896 atm.L / 0.002463 atm.L/K
T = 321 K 0r 3.21×10² K
Related Questions
consider a half life of 5.3 years for cobalt-60. if you start with 100 grams of cobalt-60, how many grams of cobalt-60 would you have in 5.3years?
Answers
By considering a half life of 5.3 years for cobalt-60. if you start with 100 grams of cobalt-60, 50 grams of cobalt-60 would you have in 5.3years.
After one half-life of cobalt-60, half of the original sample would decay into another element. So after 5.3 years, half of the initial 100 grams of cobalt-60 would decay into another element, leaving 50 grams of cobalt-60.
Therefore, after another 5.3 years, half of the remaining 50 grams of cobalt-60 would decay, leaving only 25 grams of cobalt-60. This process would continue for each successive half-life.
In summary, after one half-life, there would be 50 grams of cobalt-60 remaining, and after two half-lives, there would be 25 grams remaining.
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EARTH SCIENCE
When water gets warm, dissolved oxygen
increases.
is not effected.
decreases.
Answers
Answer:
decreases
Explanation:
warm water hold less dissolved oxygen than cold water because the molecules are moving faster.
A mixture of three gases has a total pressure of 365 mmHg. Gas A contributes a pressure of 53 mmHg and gas B contributes a pressure 185 mmHg. What is the partial pressure of gas C?
If you give explanation and answer, I will give you brainliest answer. :)
Answers
This question considers two applications of systems of linear equations. The sys- tems should be solved using Gaussian elimination.
(a) Balance the chemical reaction below involving carbon (C), hydrogen (H), and oxygen (O). In other words, find the smallest positive integers x, y, z, w so that the reaction is balanced by setting and solving a system of linear equations. Give the balanced chemical reaction.
xCO₂ + yH₂O → 2C6H12O6 + wO2.
This is called the photosynthesis reaction, and C6H12O6 is glucose.
Answers
The balanced chemical reaction using a system of linear equations is 24CO₂ + 24H₂O → 2C₆H₁₂O₆ + 12O₂
How to balance chemical reaction?In the chemical reaction given, to balance:
xCO₂ + yH₂O → 2C₆H₁₂O₆ + wO₂
Set up the equations. Have the same number of each type of atom on each side of the equation.
For carbon (C):
x = 262 (12 carbon atoms in each C₆H₁₂O₆ and there are 2 of them)
For hydrogen (H):
2y = 2122 (12 hydrogen atoms in each C₆H₁₂O₆ and there are 2 of them)
For oxygen (O):
2x + y = 1222 + 2w (6 oxygen atoms in each C₆H₁₂O₆, there are 2 of them, and there are 2 atoms in each O2)
From the first two equations x = 24 and y = 24.
Substituting x and y into the oxygen equation gives:
224 + 24 = 122*2 + 2w
72 = 48 + 2w
2w = 24
w = 12
So, the balanced chemical reaction is:
24CO₂ + 24H₂O → 2C₆H₁₂O₆ + 12O₂
This is the photosynthesis reaction, which converts carbon dioxide and water into glucose and oxygen, with the help of sunlight.
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I need help please please please
Answers
The toxic chemicals is different from the safe chemical because the stronger attraction between it's molecule than the safe chemical.it molecule now move away from each. The correct option is C
What is toxic chemical?Toxic chemical can be defined as a substance that can be poisonous or cause health effects. Some examples of toxic chemical include ammonia, acid, bleach, chlorine, and carbon monoxide.
Therefore toxins are substances created by plants and animals that are poisonous to humans. Toxins may also include some medicines that are helpful in small doses but poisonous in large amounts.
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A loaded coal wagon with a total mass of 20 000 kg is pushed by a force of 300 000 N. What was the wagon’s acceleration?
Pls show work as well
Answers
Answer:
15 m/s²Explanation:
The acceleration of an object given it's mass and the force acting on it can be found by using the formula
\(a = \frac{f}{m} \\ \)
f is the force
m is the mass
From the question we have
\(a = \frac{300000}{20000} = \frac{30}{2} \\ \)
We have the final answer as
15 m/s²Hope this helps you
Functionally, the endocrine system is like what other human body system, in that it sends information throughout the body?
A: muscular system
B: skeletal system
C: digestive system
D: nervous system
Answers
Answer:
Nervous System
Explanation:
They work together
how many significant figures are in the following? 22.045
Answers
Answer:
5 significant figures
Explanation:
zeros between whole numbers are always significant
Answer:
\(\huge\boxed{Answer=> 5}\)
Explanation:
Picture below of how to calculate significant figures.
⇒ The number of significant is... 5
⇒ And, the number of decimals is... 3
Therefore, The answer to your question & problem will be ( 5 significant digits ).
(Picture attached)
what is glue made up of
Answers
Answer:
Glue is made up of - combination of polyvinyl acetate (PVA), water, ethanol, acetone and other substances. The animal remains that are the raw materials for glue may include ears, tails, scraps of hide or skin, scrapings from the fleshy sides of hides, tendons, bones and collagen taken from animal parts, particularly horse hooves and bones.
Explanation:
Oof hope this helps =)
Answer:
Synthetic glues and adhesives are made from polyvinyl acetate, water, ethanol, acetone and some other substances. The water is used to modify the glue's consistency while the other substances are used to control the drying rate of the glue.
What mass of co2 is produced when 25.00 ml sample of ethanol (density = 0.789 g/ml) combusts?
Answers
The mass of CO2 gas is 19.725 grams when a 25.00 ml sample of ethanol with a density of 0.789 g/ml combusts.
What is Density?Density may be defined as a type of physical property that significantly deals with the description of how much space an object or substance takes up with respect to the amount of matter in that object or substance.
In a more simple sense, it is characterized as the measurement of quantity or mass per unit of volume in a particular substance.
According to the question,
The mass of the CO2 = ?
The density of the CO2 gas = 0.789 g/ml.
The volume of CO2 gas = 25.00 ml.
The formula for calculating the density is as follows:
Density = Mass/Volume.Mass = Density × Volume.= 0.789 g/ml × 25.00 ml. = 19.725 grams.
Therefore, the mass of CO2 gas is 19.725 grams when a 25.00 ml sample of ethanol with a density of 0.789 g/ml combusts.
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The density of butter is 0.86 g/cm3. what is the mass of 240 cm3 of butter?
Answers
Answer:
mass= 206.4 g
Explanation:
Density= mass/volume
0.86=x/240
x=240×0.86
=206.4g
The density of butter is 0.86 g/cm³. 206.4g is the mass of 240 cm³ of butter. The phrase "specific volume" is occasionally used in thermodynamics to refer to a substance's reciprocal of its density.
Density, mass of a unit volume of a material substance. The formula for density is d = M/V, where d is density, M is mass, and V is volume. Density is commonly expressed in units of grams per cubic centimetre. For example, the density of water is 1 gram per cubic centimetre, and Earth’s density is 5.51 grams per cubic centimetre. Density can also be expressed as kilograms per cubic metre (in metre-kilogram-second or SI units). For example, the density of air is 1.2 kilograms per cubic metre.
Density= mass/volume
0.86=x/240
x=240×0.86
=206.4g
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which of the following uses mechanical energy to function?
A. computer
B. battery
C. microwave oven
D. windmill
Answers
1.Which of these formulas contains the most polar bond?
H-Br
H-Cl
H-F
H-I
Answers
Answer:
H—F. Fluorine Explanation:
An unknown gas has pressure, volume and temperature of 0.9 atm 8L and 120°C respectively. How many moles of gas are present?
Answers
Answer:
n = 0.223 mol.
Explanation:
Hello there!
In this case, according to the given information, it is possible for us to approach this problem via the ideal gas law, which involves the pressure, moles, temperature and volume of the gas:
\(PV=nRT\\\\\)
Thus, by solving for moles we obtain:
\(n=\frac{PV}{RT}\)
Therefore, we plug in the given volume, temperature (in Kelvins) and pressure to obtain:
\(n=\frac{0.9atm*8L}{0.08206\frac{atm*L}{mol*K}*(120+273)K} \\\\n=0.223mol\)
Best regards!
why is enol formation in dimedone more favorable than in cyclohexanone?
Answers
The formation of enol is more favorable in dimedone compared to cyclohexanone due to the presence of keto-enol tautomerism and the stabilization of the enol form.
In dimedone, the presence of two electron-withdrawing carbonyl groups (C=O) on adjacent carbon atoms allows for the formation of an enol tautomer. The enol form is stabilized through intramolecular hydrogen bonding between the hydrogen atom of the enol group and the oxygen atom of the neighboring carbonyl group. This hydrogen bonding imparts additional stability to the enol form, making its formation more favorable. On the other hand, cyclohexanone lacks the electron-withdrawing carbonyl group in close proximity to facilitate enol formation. The absence of adjacent carbonyl groups hinders the formation of the enol tautomer and reduces the stability of the enol form. As a result, the formation of enol is less favorable in cyclohexanone compared to dimedone.
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In a reacting flask, 500 cm3 hydrogen is mixed with 500 cm3 oxygen and is ignited. (a) Which reactant is the limiting reagent? (b) Calculate the mass of water formed.
Answers
Answer:
See Explanation
Explanation:
From Gay-Lussac's law of combining volumes;
Equation of the reaction; 2H2(g) + O2(g) -------> 2H2O(g)
Ratio of volumes; 2 : 1 : 2
Initial volumes; 500cm^3 500cm^3 0 cm^3
Reacting volumes; 500cm^3 250cm^3 500cm^3
Final Volumes; 0 cm^3 250 cm^3 500 cm^3
We can easily see from the table that the limiting reactant is oxygen.
Hence, the mass of water formed is obtained from;
1 mole of gaseous water occupies 22400 cm^3
x moles of water occupies 500cm^3
x = 500cm^3 * 1 mole/22400 cm^3
x = 0.022 moles of water
Mass of water = 0.022 moles of water * 18 g/mol
Mass of water = 0.396 g
Which of the following could be used to sterilize objects such as medical devices?
a. ethylene oxide
b. silver nitrate
c. 100% alcohol
d. orthophenylphenol
Answers
The following could be used to sterilize objects such as medical devices:a. Ethylene oxide. Ethylene oxide (EtO) is an industrial chemical compound used in sterilization and fumigation.
It is commonly utilized to sterilize medical devices and surgical instruments that cannot be sterilized with conventional steam sterilization techniques. The ethylene oxide procedure, often known as EtO sterilization, involves exposing products to a certain concentration of ethylene oxide gas in a low-pressure chamber for a specified amount of time to achieve sterilization.
Ethylene oxide is an excellent sterilization option for items that may be damaged by heat or moisture, including medical implants, plastic containers, and packaging materials, as well as electronic instruments.The other options, such as silver nitrate, 100% alcohol, and orthophenylphenol are not typically used for the purpose of sterilizing medical devices and equipment. While silver nitrate is used in some medical applications, such as treating eye infections in newborns, it is not typically used as a sterilizing agent. Similarly, 100% alcohol is a disinfectant and can be used to clean surfaces, but it is not effective at sterilizing medical equipment.
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The mass of a 8.41 mL liquid sample was determined to be 10.8405 g. What is the density of the liquid
Answers
Answer: 1.289 g/ml
Explanation:
density= m/v
m=10.8405
v=8.41
10.8405/8.41
d= 1.289 g/mL
which of the elements listed below has the highest first ionization energy? question 9 options: he ne ar kr xe
Answers
The largest initial ionization energy belongs to Helium. It is the first member of the noble gas group in the periodic table and is a colorless, odorless, tasteless, inert, monatomic gas.
Where can one find helium?Helium is used as a coolant in nuclear reactors, in compressed air tanks, and in lasers. Of all the elements, Helium has the lowest melting and boiling points.
What purpose serves helium?A typical carrier gas for gas chromatography is Helium. It can be used to determine the age of rocks and minerals that contain uranium and thorium.
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2 The polar structure of water allows it to act as a solvent for many substances. Which of the
following statements best explains why water is considered polar?
F The unequal sharing of electrons results in the water molecule having a slightly negative
charge near its oxygen atoms and a slightly positive charge near its hydrogen atom.
G The equal sharing of electrons by the hydrogen and oxygen atoms form weak bonds that are
easily broken during dissociation.
H The unequal sharing of electrons results in the water molecule having a slightly positive
charge near its oxygen atoms and a slightly negative charge near its hydrogen atom.
The equal sharing of electrons by the hydrogen and oxygen atoms create a molecule that is
neutrally charged
Answers
Answer:
Explanation:
A chemical reaction rate can be increased by either ________ the temperature or ________ the
Answers
A chemical reaction rate can be increased by either increasing the temperature or decreasing the activation energy.
The rate of a chemical reaction is influenced by several factors, including temperature and activation energy.
1. Increasing the temperature: When the temperature is increased, the average kinetic energy of the reactant molecules also increases. This results in more frequent and energetic collisions between the reactant molecules, leading to a higher probability of successful collisions and increased reaction rate. Additionally, an increase in temperature can provide the reactant molecules with sufficient energy to overcome the activation energy barrier.
2. Decreasing the activation energy: Activation energy is the minimum energy required for a reaction to occur. By decreasing the activation energy, either through the use of a catalyst or by adjusting the reaction conditions, the barrier for the reaction to proceed is lowered. This allows a larger fraction of the reactant molecules to possess the necessary energy to overcome the reduced activation energy, resulting in an increased reaction rate.
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A sample of ground beef contains 21.3% protein and 16.9% fat, both by mass. What mass of this ground beef, in grams, contains 350 Calories? Assume all Calories come from protein and fat.
Answers
Answer:
147.5 grams
Explanation:
Let the required mass of ground beef be m .
protein in it = .213 m
fat in it = .169 m
1 gram of protein gives 4 cals .
1 gram of fat gives 9 cals .
cals given by .213 m protein = 4 x .213 m .
cals given by .169 m fat = 9 x .169 m .
4 x .213 m + 9 x .169 m = 350
.852 m + 1.521 m = 350
2.373 m = 350
m = 147.5 grams Ans
what is the frequency of 704 nm light?
Answers
Explanation:
Sorry pa Wala. Thank God
A Lay's potato chip weighing 4.03g is put into a bomb calorimeter containing 895.5g of water at 25.10°C. If this increases the temperature of the surrounding water to 48.89°C, what is the amount of calories per serving if 1 serving = 28.38g (remember, 4.184J = 1 cal, 1000 cal = 1 Cal)?
Answers
The amount of calories per serving if 1 serving is 28.38g= 750.66 Cal/serving.
What are calories?Calories are a unit of energy commonly used in nutrition to measure the amount of energy provided by food. Specifically, a calorie is the amount of energy required to raise the temperature of 1 gram of water by 1 degree Celsius.
To solve this problem, we need to use the formula for heat:
Q = m × c × ΔT
where Q is the heat absorbed or released, m is the mass of the substance, c is the specific heat capacity, and ΔT is the change in temperature.
First, we need to find the heat absorbed by the water:
Q_water = m_water × c_water × ΔT_water
= 895.5 g × 4.184 J/g°C × (48.89°C - 25.10°C)
= 89135.7J
Next, we need to find the heat released by the potato chip:
Q_chip = m_chip × c_chip × ΔT_chip
We can assume that the potato chip is mostly made of carbohydrates, which have a specific heat capacity of about 4.2 J/g°C. Since the potato chip and the water reach thermal equilibrium, we can assume that the final temperature of the potato chip is the same as the initial temperature of the water (25.10°C). Therefore:
Q_chip = 16.926 J × (25.10°C - 25.10°C)
= 0 J
Finally, we can find the total heat absorbed by the system (water and potato chip):
Q_total = Q_water + Q_chip
= 89135.7J + 0 J
= 89135.7J
To convert this to calories, we divide by 4.184:
Q_total = 21303.9 calories
To find the number of calories per serving, we divide by the mass of one serving:
Calories per serving = 21303.9 cal / 28.38 g
=750.66 cal/g
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Determine if the following reactions are homogeneous or heterogeneous reactions.
1) 2NO(g)+Br2(g)↽−−⇀2NOBr(g)
2) Al2O3(s)+6HClO4(aq)↽−−⇀2Al(ClO4)3(aq)+3H2O(l)
3)H2SO4(aq)+Fe(OH)3(s)↽−−⇀Fe2(SO4)3(aq)+H2O(l)
4) SiH4(g)+2Cl2(g)↽−−⇀CiCl4(g)+2H2(g)
5) Zn(s)+Cu(NO3)2(aq)↽−−⇀Cu(s)+Zn(NO3)2(aq
Answers
1) The reaction is homogeneous because all reactants and products are in the gas phase.
2) The reaction is heterogeneous because the reactants are in different phases.
3) The reaction is heterogeneous because the reactants are in different phases.
4) The reaction is homogeneous because all reactants and products are in the gas phase.
5) The reaction is heterogeneous because the reactants are in different phases.
A homogeneous reaction is one in which all reactants and products are in the same phase. A heterogeneous reaction is one in which the reactants are in different phases. Therefore, the answers to the questions are:
The reaction is homogeneous because all reactants and products are in the gas phase.The reaction is heterogeneous because Al₂O₃ is a solid, while HClO₄ is an aqueous solution. The product, Al(ClO₄)₃, is also an aqueous solution, whereas H₂O is a liquid.The reaction is heterogeneous because H₂SO₄ is an aqueous solution, whereas Fe(OH)₃ is a solid. The product, Fe₂(SO₄)₃, is also an aqueous solution, whereas H₂O is a liquid.The reaction is homogeneous because all reactants and products are in the gas phase.The reaction is heterogeneous because Zn is a solid, whereas Cu(NO₃)₂ is an aqueous solution. The product, Cu, is a solid, while Zn(NO₃)₂ is an aqueous solution.Each of the reactions was analyzed to determine whether they are homogeneous or heterogeneous reactions. The results were recorded, and it was discovered that all of the reactions are either homogeneous or heterogeneous.
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DO ANY OF YALL KNOW THIS?????
1. Why do we need to use the mole to count atoms? (2pts)
2. What is the Molar mass of the following? Show your work
a. H2O2 (4pts)
b. C2H6 (4pts)
Answers
Answer:
1.mole allows us to weigh convenient amounts of material containing known numbers of atoms; i.e., it allows us to count atoms
2. H202 :34.0147 g/mol
C2H6: 30.07 g/mol
I currently just need help with this right now.
Answers
Answer:
2.43 grams are needed
Explanation:
I did the test
Hope this helps :)
I have a test in chem soon can any one help me?
Answers
Answer:
I will be glad to
nitrates, turbidity and acidity. Whichwater sample was likely runoff from a farm?
Answers
Answer:
What is the most likely source of nitrogen in runoff? Fossil fuel emissions.
3. Which best explains the flow of energy in an internal combustion engine?
O
A. Work is converted into energy stored in chemical bonds.
B. The expansion of gases is used to do work.
C. Heat is converted into work to power the engine.
D. An increase in pressure is converted into heat and work.
Check Answer
Answers
An increase in pressure is converted into heat and work, explains the flow of energy in an internal combustion engine. Gasoline is ignited and consumed within an internal combustion engine (ICE) by the engine itself.
The engine then partially transforms the energy from combustion into work. The engine is composed of a fixed cylinder and a rotating piston. There are three main types of internal combustion engines in use today: the spark ignition engine, which is mainly used in automobiles; the diesel engine, which is used in heavy machinery and industrial systems and has an advantage over the more compact and lighter ones due to improvements in cycle efficiency.
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