a sample of gas has an initial volume of 12.7 l at a pressure of 1.03 atm .if the sample is compressed to a volume of 11.4 l , what is its pressure?
Answers
If the sample is compressed to a volume of 11.4L, the pressure is 1.147 atm.
What is pressure?"Pressure" is defined as the thrust (force) applied to a surface per area. The ratio of force to area is another way to describe it (over which the force is acting).
Formula and Pressure's Unit:
Thrust/Area = Pressure (P)
Pascals (Pa) is the SI unit. 1 Pa = 1N/m2
For instance, it is simpler to hammer a sharp pin than dull pin. This is due to the fact that sharp pin's end has a lower surface area than blunt pin. This causes the pressure to rise.
Types of Pressure:
Atmospheric PressureAbsolute PressureDifferential PressureGauge PressureCalculation:
We can find \(P_{2}\) by using the formula for Boyle's law:
\(P_{1} V_{1} = P_{2} V_{2}\)
Since we are finding another pressure:
\(P_{2} = \frac{P_{1}V_{1}}{V_{2}}\)
From the question we get:
\(P_{2} = \frac{(1.03)(12.7 ) }{11.4 }\)
\(P_{2} = 1.147\)
Therefore the pressure is 1.147 atm.
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Related Questions
what is a major difference between the rutherford and the wave mechanical models of the atom
Answers
The Rutherford model of the atom was proposed by Ernest Rutherford in 1911.
According to this model, the atom consists of a central positively charged nucleus around which negatively charged electrons revolve in circular orbits. This model was based on Rutherford's famous gold foil experiment, which demonstrated that atoms have a small, dense, positively charged nucleus. However, this model was found to have some major flaws, particularly regarding the stability of the electron orbits. According to classical physics, the electrons should continuously emit electromagnetic radiation and lose energy, eventually collapsing into the nucleus. This problem was resolved with the development of the wave mechanical models of the atom, also known as quantum mechanics. These models propose that electrons do not move in fixed orbits but rather occupy specific energy levels or orbitals around the nucleus. The behavior of electrons is described in terms of probability distributions, which determine the likelihood of finding an electron in a particular region of space around the nucleus. The wave mechanical models also explain the phenomena of electron spin, electron density, and electron tunneling. In conclusion, the main difference between the Rutherford and wave mechanical models is that the former is a classical model that describes the atom in terms of fixed orbits, while the latter is a quantum mechanical model that describes the atom in terms of probability distributions and energy levels.
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Calculate q, the heat released in each reaction.
Use the equation q = cmAT.
(Use c = 4.18 J/g °C and the total mass, m.)
Record to 2 significant figures.
Reaction 1: blank J
Reaction 2: blank J
Answers
The heat released in each reaction is:
Reaction 1: 3700J
Reaction 2: 3200J
What is heat?
Heat is a transfer of kinetic energy from one medium or object to another or from an energy source to a medium or object. A similar energy transfer can be done in three ways: radiation, conduction, and convection.The standard unit of heat in the International System of Units( SI) is the calorie( cal), which is the quantum of energy transferred needed to raise the temperature of one gram of pure liquid water by one degree Celsius, assuming that the temperature of the water is advanced. advanced than the freezing point and lower than the boiling pointTo know more about heat, click the link given below:
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How many hydrogen atoms are in 2.0 GH
Answers
Answer:
2 hydrogen atoms
Explanation:
because the hydrogen atoms are two
Name one physical obsevation by which we can conclude that a chemical reaction takes place during electropining?
Answers
The changes in properties can be used as evidence that a chemical reaction has occurred during the electrospinning process.
What is electroplating?
Electrospinning is a process that involves the use of an electric field to create fine fibers from a polymer solution. During electrospinning, it may be difficult to observe a physical change that indicates a chemical reaction is taking place.
However, if the polymer solution undergoes cross-linking or curing reactions during the electrospinning process, then the resulting fibers may have different mechanical, thermal, or chemical properties compared to the original polymer solution. These changes in properties can be used as evidence that a chemical reaction has occurred during the electrospinning process. For example, if the resulting fibers are insoluble in a solvent that could dissolve the original polymer solution, this could be an indication of cross-linking reactions taking place during electrospinning.
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The deamination of which of these substances in the soil produces ammonia?
a. amino acids
b. acetic acid
c. hydrochloric acid
Answers
The deamination of: amino acids in the soil produces ammonia. The correct option is a. Deamination is a process in which the amino group (-NH2) is removed from an amino acid, resulting in the formation of ammonia (NH3).
Amino acids are organic compounds that contain an amino group and a carboxyl group (-COOH). In the soil, organic matter such as decaying plant and animal material can contain amino acids. Through microbial activity, certain microorganisms can perform deamination, breaking down the amino acids and releasing ammonia as a byproduct.
This process contributes to the nitrogen cycle in the soil, making ammonia available for plants to utilize as a nutrient. Option b, acetic acid, is not directly involved in the production of ammonia through deamination. Acetic acid is a weak acid commonly found in vinegar and other organic substances. Option c, hydrochloric acid, is an inorganic acid that does not undergo deamination. It is a strong acid and has different chemical properties compared to amino acids.
Therefore, the deamination of amino acids in the soil is responsible for the production of ammonia. The correct option is a.
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Read the directions and create the graph described below. You will then click the submit button and upload a picture of your graph or some sort of digital version of your graph. It could be done 1) using a computer program or 2) hand-drawn, photographed, and submitted.
You are to create a graph with horizontal and vertical axis. Label "Pressure" on the horizontal axis from O mb to 760 mb. Label "Volume" on the vertical axis from O to 1 mL. Assign values to axes divisions in such a way that you occupy almost all the space on both axes. Now, locate and label the following points:
(90, 0.9)
(100, 0.8)
(400, 0.2)
(600, 0.15)
(760, 0.1)
Answers
The characteristics of the graphs we can find the answer on how to draw the graph
Scales: The x scale = 40 mb / cm paper and the y scale = 0.05 mL / cm paper Graphic attached
The graphical representation is one of the best methods to visualize the relationships between a series of experimental data and to be able to find their functional relationships.
A graphic representation has several parts
Find the scales. Mark the values on the x and y axis Plot the experimental points Draw the curve through the experimental points
The scales are found with the relationship between the variation of the data between the amount of paper or graph range, let's look for the scales for each axis.
x-axis
The variation of the data Δx = Final value - initial value
Paper range, generally it is x = 20cm (sheet size)
They indicate that the graph must start at zero, so the minimum value must be changed,
initial value = 0
Δx = 760 -0 = 760
x scale = 760/20
x scale = 38 mb / cm of paper
y-axis
Data range Δy= 0.9 -0
Paper range y= 20 cm (sheet size)
y-scale = 0.9 / 20
y scale = 0.045 mL / cm paper
One of the characteristics of the scale is that it must be comfortable for graphing, which is why it approximates the following units
Selected scales
x scale = 40 mb / cm paper
y scale = 0.05 mL / cm paper
The second part consists of marking values equally spaced and facilitating readable in the two axes, see attached for a graph made in a computer program
Plot each experimental point as best as possible, there are always some approximations by the selected scales
Draw a curve that passes through most of the experimental points and those that remain outside are balanced above and below the curve, in this case the program draws a line between each point, but it is preferable to draw a smooth curve.
In conclusion with the characteristics of the graphs we can find the answer on how to draw the graph
x scale = 40 mb / cm paper y scale = 0.05 mL / cm paperGraphic attached
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Using all of the terms in the word bank, complete the graphic organizer below.
Answers
2. solid
3. liquid
4. gas
5 loosely packed particles
6. compressible
7. incompressible
To what temperature must 20.2 g of hydrogen gas be heated at 110 kPa to occupy a volume of 4.45 x 10^-2 kL
Answers
Answer:
59K
Explanation:
Using the general gas law equation:
PV = nRT
Where;
P = pressure (atm)
V = volume (L)
n = number of moles (mol)
R = gas constant (0.0821 Latm/molK)
T = temperature (K)
According to the information given in the question;
- mass of hydrogen gas = 20.2g
mole = mass/molar mass
mole = 20.2/2.015
mole = 10.01mol
- Pressure = 110 Kpa
1 kilopascal = 0.00987 atmosphere
110kPa = 110 × 0.00987
= 1.09atm
- Volume = 4.45 x 10^-2 kL
1 kL = 1000L
4.45 x 10^-2 kL = 4.45 x 10^-2 × 10³
4.45 × 10¹
= 44.5L
Using PV = nRT
T = PV/nR
T = 1.09 × 44.5/0.0821 × 10.01
T = 48.505/0.821
T = 59.02
T = 59K
Write chemical equations for the following chemical reactions:
a)decomposition of zinc carbonate
b)decomposition of lead nitrate
c(decomposition of ammonium dichromate
d)Reaction between magnesium and sulphuric acid
e)reaction between copper sulphate and zinc.
f)reaction between silver nitrate and hydrochloric acid
g)reaction between barium chloride and sodium sulphate
h) Reaction between sodium hydroxide and hydrochloric acid.
Answers
Answer:
in this reaction more reactive mg is replacing
less reactive h. hence it is dipalcement reaction.
Explanation:
hope its hepl you
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Which particle diagram represents a mixture of three substances
Answers
Need help with #1 and #2
Answers
Answer:
To calculate half life, divide original value by 2.
1.
FOUR HALF LIVES = divide original value by 2, 4 times.
40÷ 2 = 20
20 ÷ 2 = 10
10 ÷ 2 = 5
5 ÷ 2 = 2.5g
2. AFTER TEN DAYS (TWO HALF LIVES)
140 ÷ 2 = 70
70÷ 2 = 35g
AFTER TWENTY DAYS (FOUR HALF LIVES)
140 ÷ 2 = 70
70 ÷ 2 = 35
35 ÷ 2 = 17.5
17.5 ÷ 2 = 8.75g
Saturated steam at 0. 276MPa (Tsat-1310C) flows inside a steel pipe having an inside diameter of 2. 09cm and an outside diameter of 2. 67cm. The convective heat transfer coefficients on the inner and outer pipe surfaces may be taken as 5680 W/m2 K and 22. 7W/m²K respectively. The surrounding air is at 294K. Find the overall heat transfer coefficient, U. (W/m. K) and heat loss per meter (W/m) of this bare pipe. If now this pipe is covered with 3. 8cm thickness of 85% magnesia insulation, find the new overall heat transfer coefficient U beat loss of this pipe per m length and thereby estimate the percent reduction in heat loss due to insulation Take k values of steel=42. 9W/mK and 85% magnesia=0. 0675W/m. K
Answers
The overall heat transfer coefficient, U, is the sum of the individual heat transfer coefficients on the inner and outer surfaces of the pipe. To find U, we need to calculate the individual heat transfer coefficients and then sum them.
First, let's calculate the individual heat transfer coefficient on the inner surface of the pipe. We can use the convective heat transfer coefficient formula:
h_inner = 5680 W/m^2 K
Next, let's calculate the individual heat transfer coefficient on the outer surface of the pipe. Again, we can use the convective heat transfer coefficient formula:
h_outer = 22.7 W/m^2 K
Now, let's find the overall heat transfer coefficient, U:
U = (1 / h_inner + 1 / h_outer)^-1
Substituting the values we have:
U = (1 / 5680 + 1 / 22.7)^-1
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hlight
How are rocks weathered as in this example seen here?
ame
aining
22:01
Tools
A)
The rocks change their composition.
B)
The rocks are being chemically weathered by the water.
Freezing and thawing of water breaks the rocks into pieces.
D)
Hot lava is pushing on the rock and breaking it into pieces.
Answers
Answer:
B). The rocks are being chemically weathered by the water.
Explanation:
Because the water is slowly destroying the rock
what type of light bulb is usually filled with a mixture of inert gases (ar and kr) and mercu
Answers
The type of light bulb that is usually filled with a mixture of inert gases (such as argon and krypton) and mercury is a fluorescent light bulb.
Fluorescent bulbs contain a glass tube coated with phosphor on the inside. The tube is filled with a mixture of inert gases, primarily argon and krypton, at low pressure. These inert gases help create a stable environment inside the bulb.
When an electric current flows through the tube, it excites the mercury vapor present in the bulb. The excited mercury emits ultraviolet (UV) light, which then interacts with the phosphor coating, causing it to fluoresce and emit visible light. This process produces the characteristic glow of fluorescent bulbs. The inert gases help facilitate the efficient transfer of energy and maintain the stability of the bulb during operation.
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Which type of light microscope uses visible light and lenses to
magnify objects?
Answers
various aspects of this experiment are time sensitive. preparing your samples and taking measurements too soon may yield inaccurate results because the reaction may not have reached equilibrium yet, and so on. to avoid that situation, a student prepares and mixes their solutions to start the reaction. they then make special arrangements to leave their solutions out on the lab bench all day and return that evening (6 hours later) to take their readings. considering the specific species present in the reaction, what, if anything, will the student notice about the absorbance results?
Answers
The student may observe a decrease in the absorbance results due to the reaction having reached equilibrium and the concentrations of the species involved having changed over time.
The specific species present in the reaction will determine the rate at which the reaction reaches equilibrium. If the reaction is slow to reach equilibrium, leaving the solutions out on the lab bench for only 6 hours may not be enough time for the reaction to fully proceed and reach equilibrium. This can result in inaccurate absorbance results due to incomplete reaction.
Conversely, if the reaction reaches equilibrium quickly, leaving the solutions out for 6 hours may not have a significant effect on the absorbance results. Therefore, it is important to consider the reaction kinetics and equilibrium characteristics of the specific species present in the reaction to ensure accurate absorbance readings.
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--The complete question is, A student has prepared and mixed their solutions for an experiment, and left them on the lab bench for 6 hours before taking absorbance readings. What considerations should be made with regards to the specific species present in the reaction and how might this impact the accuracy of the absorbance results?--
Chemical compounds will form so that each atom, by gaining, losing or sharing electrons, will have their highest occupied energy level filled is called the
Answers
Answer:
it is nobel gas arrangement electronic configuration it become stable
Determine the complete, balanced chemical reaction for the following reaction. Selenic acid (H2SeO4) is a powerful oxidizing acid and it dissolve silver and gold: Au + H2SO4 --> Au2(SeO4)3 + H2SO3 + H2O Then, proceed to answer the following questions: Reactants: Enter the coefficient number in front of Au in the reaction: | Enter the coefficient number in front of H2Se04 in the reaction: Products: Enter the coefficient number in front of Auz(SeO4)3 in the reaction: Enter the coefficient number in front of H2SeO3 in the reaction: Enter the coefficient number in front of H20 in the reaction: What type of chemical reaction is this? Enter one of the following: "synthesis", "decomposition", "single displacement", or "double displacement".
Answers
The complete, balanced chemical reaction for the reaction between gold (Au) and selenic acid (H2SeO4) is: 4Au + 3H2SeO4 → 2Au2(SeO4)3 + H2SO3 + H2O. The coefficients for the reactants and products are as follows: 4 for Au, 3 for H2SeO4, 2 for Au2(SeO4)3, 1 for H2SO3, and 1 for H2O. The type of chemical reaction is a single displacement reaction.
The balanced chemical equation for the reaction between gold (Au) and selenic acid (H2SeO4) is:
4Au + 3H2SeO4 → 2Au2(SeO4)3 + H2SO3 + H2O
In this equation, the coefficient in front of Au is 4, indicating that 4 moles of gold are involved in the reaction. The coefficient in front of H2SeO4 is 3, indicating that 3 moles of selenic acid are present.
On the product side, the coefficient in front of Au2(SeO4)3 is 2, indicating the formation of 2 moles of gold selenate. The coefficient in front of H2SO3 is 1, representing the formation of 1 mole of sulfurous acid. The coefficient in front of H2O is also 1, indicating the production of 1 mole of water.
Based on the reactants and products involved, the type of chemical reaction is a single displacement reaction, as gold displaces hydrogen in selenic acid to form gold selenate.
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Which choice can be classified as a pure substance?
salt water
Iced Tea
pumpkin pie
salt
Answers
Answer:
Salt
Explanation:
It is because it has a defined composition.
Answer:
Salt
Explanation:
Pure substances are those that contain atoms or molecules of the same type. For eg: elements are pure (gold, hydrogen etcl.) and compounds (such as water, sodium chloride, etc.), etc.
Rest of choice are impure because they contain a mixture of different things, like pie has eggs, or all sorts of other molecules, salt water has water and salt molecules, and iced tea has water and other molecules associated with tea.
if we add 50ml of water to 50ml of denatured alcohol and report the final volume as 98 ml. is this the correct volume, too high, or too low?
Answers
asap if right brainly pls help
Answers
Answer:
mountains and continental drift seafloor spreading
Explanation:
A
B
C
How much energy is passed to the next trophic level in the food chain?
Answers
Answer:
10%
Explanation:
Out of the original layer, only ten percent is transferred to the next
Calculate the mass percent composition of lithium in Li3PO4.
Answers
The mass percent composition of the Lithium in the molecular formula can be given as 18%.
Mass percent composition is defined as the ratio of the mass of an element in a mole to the molar mass of a compound and multiplied by 100. This allows knowing the mass of an element in a compound or a molecule to the rest of the compound.
First, the molar mass of the whole compound is calculated by adding the individual masses and then used in an equation to get divided by the individual mass of the involved element.
The mass percent composition is given as,
% by mass = mass of element / molar mass of compound × 100%
Therefore, the mass percent composition involves the mass of the individual elements and molar mass.
First of all we determine the molar mass of Lithium phosphate,
Molar mass is 115.79 g/ mol
1 mol of lithium phosphate has:
3 moles of Li → 20.82g
The mass percent composition of lithium will be:
(Mass of Li / Total mass) . 100
= (20.82 g / 115.79 g) . 100
= 18 %
Therefore, mass percent composition is 18 %.
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A 3.5L flexible container holds a gas at 250K. What will the new volume be if the temperature is increased to 400K?
Answers
Answer: 5.6L
Explanation:
Just did it on an assignment
A 3.5L flexible container holds a gas at 250K. The new volume will be 5.6 L, if the temperature is increased to 400K.
What is Charles Law ?Charles law is an ideal gas law which states that at a constant pressure volume of a gas is directly proportional to the absolute temperature.
It is expressed as
\(\frac{V_1}{T_1} = \frac{V_2}{T_2}\)
where,
V₁ = initial volume
T₁ = initial temperature
V₂ = final temperature
T₂ = final temperature
Now put the values in above formula, we get
\(\frac{V_1}{T_1} = \frac{V_2}{T_2}\)
\(\frac{3.5\ L}{250\ K} = \frac{V_2}{400\ K}\)
\(V_{2} = \frac{3.5\ L \times 400\ K}{250\ K}\)
\(V_{2} = \frac{1400}{250}\)
V₂ = 5.6 L
Thus, from the above conclusion we can say that A 3.5L flexible container holds a gas at 250K. The new volume will be 5.6 L, if the temperature is increased to 400K.
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The types of emission that mostly occur when an isotope undergoes radioactive decay include.
Answers
The types of emissions that mostly occur when an isotope undergoes radioactive decay include alpha particles, beta particles, and gamma rays.
The types of emissions that can occur when an isotope undergoes radioactive decay are alpha, beta, and gamma radiation. Alpha particles are made up of two protons and two neutrons and are positively charged. Beta particles are either electrons or positrons, and they are negatively or positively charged, respectively. Gamma radiation is a high-energy electromagnetic radiation that has no charge.
During alpha decay, the nucleus of an atom emits an alpha particle. This changes the atomic number of the element, but not its mass number. Beta decay occurs when a neutron in the nucleus of an atom transforms into a proton and an electron or positron is emitted. This can change the atomic number of the element, but not its mass number. Gamma decay occurs when the nucleus of an atom releases energy in the form of gamma radiation. This does not change the atomic number or mass number of the element.
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what is carbon's atomic mass?
Answers
Answer:
12g/mol
Explanation:
you can use the periodic table to find this information, just look for C (carbon) and the atomic mass will be next to it
How IS energy related to the change of state represented
by the model?
Atoms gain energy as a solid changes to a gas.
Atoms gain energy as a liquid changes to a gas.
Atoms lose energy as a solid changes to a gas.
Atoms lose energy as a liquid changes to a gas.
Answers
Answer:
Gain energy as a liquid changes to a gas
Explanation:
get further apart= more kinetic energy
liquid at beginning as not uniform but quite close together and takes shape of container
The answer is...Liquid into gas.
My Explanation:
Stated in the model, The atoms aren't that active but can still slider past each other; meaning, this is a liquid. As it shifts into a gas, which is when atoms pick up energy and move around more freely/actively, the definition of the following is "Vaporization".
So the answer is: B, or in other words, "Atoms gain energy as a liquid turns into a gas.
A sample of gas has an initial volume of 20 L and an initial pressure of 2.5 atm. If the pressure changes to 3.1 atm, what is the new volume, assuming that the temperature remains constant? Step by Step please!
Answers
The new volume is mathematically given as
V2= 16.12 L
What is the new volume?
Question Parameters:
A sample of gas has an initial volume of 20 L
and an initial pressure of 2.5 atm.
If the pressure changes to 3.1 atm
Generally, the equation for Pressure is mathematically given as
P1V1 = P2 V2
2.5 * 20 = 3.1 * V2
V2 = 50/3.1
V2= 16.12 L
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Match the term to the correct definition.
Answers
Answer:
Vitamin ----- Organic Compounds.Minerals ----- Inorganic Compounds .minerals >>> inorganic
vitamins >>> organic
Explanation:
vitamins are made by plant or animals making them organic substance
minerals haven’t been bonded with carbon and cannot bring life to a cell making them inorganic
hope this helped :)
Differentiate between 4 H2O and H8O4
Answers
Answer:
How many atoms of hydrogen and oxygen are in 2 molecules of water? ... 7) Using complete sentences, explain the difference between the chemical ... (s) solid, (l) liquid, (g) gas, (aq) aqueous solution (dissolved in water).
Explanation:
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