Answer:
This is what we're given:
P (pressure), which is 1.95 atm
V(volume), which is 11.30 L.
n(number of moles), which is 0.554 moles of helium gas.
We have to find T, or temperature. To do this, we'll need to use the Ideal Gas Law, which is:
[tex]PV = nRT[/tex]
Rearranging this equation to get temperature on one side, we get:\\ [tex]T =\frac{PV}{nR}\\ \\
Pressure \: is \: in \: atm \: and \\ volume \: is \: in \: L . \: This \: tells \\ \: us \: that \: we'll \: need \: to \: \\ use \: the \: value \: of \: 0.08206 L atm/K \: mol \: for \: R \: the \: ideal \: gas \: constant.\\ \\ Plugging in all of the values, we can solve for temperature:
[tex]T =\frac{PV}{nR}\\ \\
T = (1.95 atm × 12.30 L) ÷
(0.654 mol × 0.0820575LatmK−1)
mol
[tex]T =\frac{PV}{nR} \\ \\
T =
\frac{ (1.95 atm × 12.30 L)}{(0.654 mol × 0.0820575LatmK−1)} [/tex]
[tex]T = 447 K [/tex]
4 gas laws, and relationships do they representBoyle’s Law (PV law)
a. Volume of a GIVEN MASS OF GAS (mass is fixed) is inversely proportional to the Absolute pressure of the gas at constant Temperature.
b. Absolute pressure means pressure that is measured relative to Vacuum. Vacuum = 0 pressure. Thus, absolute pressure is measured relative to absolute 0.
c. Another way : PV = Constant. Thus, if you measure the Pressure and Volume at 3 different times, then P1 V1 = P2 V2 = P3 V3. In order to keep the product as a constant, whenever Pressure increases, the Volume will decrease.
Charle’s Law (VT Law)
a. Volume of a GIVEN MASS OF GAS (mass is fixed) is directly proportional to the Absolute Temperature at constant pressure.
b. When you measure the Temperature of a body on a scale in which 0 corresponds to Absolute 0, then the measured temperature is Absolute Temperature. Put simply, this refers to the Kelvin scale.
c. Absolute 0 is the temperature at which objects are at their lowest possible energy (Since Temperature is a measurement of the Kinetic energy of the atoms).
Gay Lussac Law (PT Law)
a. Pressure of a GIVEN AMOUNT OF MASS (mass is fixed) at constant volume is directly proportional to the absolute Temperature (that is, Kelvin Temperature).
b. Another way : P / T = Constant. P1 / T1 = P2 / T2 = P3 / T3.
Avogadro’s law (Vn law)
a. All the above laws were talking about relationships at fixed mass. So we needed a law which would relate mass with other quantities. This is Avogadro’s law.
b. It is a very straight forward law, if the amount of gas in a Container increases (that is, if the amount of matter increases), then the Volume of the gas increases which is very straight forward.
c. Volume is directly proportional to n (number of moles) or V/n = Constant.
Considering the Ideal Gas Law, at 485.05 °K 0.554 moles of helium gas will occupy 11.30 liters at 1.95 atmospheres.
On the other side, the 4 gas laws are Gay Lussac's law, Boyle's law, Charles' Law and Avogadro's law.
Ideal Gas LawIdeal gases are a simplification of real gases that is done to study them more easily. It is considered to be formed by point particles, do not interact with each other and move randomly. It is also considered that the molecules of an ideal gas, in themselves, do not occupy any volume.
The pressure, P, the temperature, T, and the volume, V, of an ideal gas, are related by a simple formula called the ideal gas law:
P×V = n×R×T
where:
P is the gas pressure.V is the volume that occupies.T is its temperature.R is the ideal gas constant. The universal constant of ideal gases R has the same value for all gaseous substances. n is the number of moles of the gas.Temperature of heliumIn this case, you know:
P= 1.95 atmV= 11.30 LT= ?R=0.082 [tex]\frac{atm L}{mol K}[/tex]n= 0.554 molesReplacing in the Ideal Gas Law:
1.95 atm×11.30 L = 0.554 moles× 0.082 [tex]\frac{atm L}{mol K}[/tex]× T
Solving:
T= (1.95 atm×11.30 L) ÷ (0.554 moles× 0.082 [tex]\frac{atm L}{mol K}[/tex])
T= 485.05 K
Finally, at 485.05 °K 0.554 moles of helium gas will occupy 11.30 liters at 1.95 atmospheres.
Gay Lussac's lawGay Lussac's law states 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.
Boyle's lawBoyle's law says that volume is inversely proportional to pressure: if pressure increases, volume decreases; while if the pressure decreases, the volume increases.
Charles' LawCharles' Law that the volume is directly proportional to the temperature of the gas: if the temperature increases, the volume of the gas increases; while if the temperature of the gas decreases, the volume decreases.
Avogadro's lawAvogadro's law states that the volume is directly proportional to the amount of gas: if the amount of gas increases, the volume will increase, while if the amount of gas decreases, the volume will decrease.
SummaryIn summary, the 4 gas laws are Gay Lussac's law, Boyle's law, Charles' Law and Avogadro's law.
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https://brainly.com/question/4147359Please help me I just need the answers please no need for the explanation
Answer:
C = q / m x dT
Explanation:
By definition, specific heat, C = heat absorbed, q divided by mass, m and change in temperature, dT
So C = q / m x dT
Answer:
The specific heat capacity of a material is the energy required to raise one kilogram (kg) of the material by one degree Celsius (°C)
Formula:
energy (J) = mass (kg) * specific heat capacity (J/kg°C ) * change in temperature
required answer:
C = q / m * dTusing the formula:
C = [tex]\frac{102}{12.5*(55-22)}[/tex]
C = 0.2473 J/kg°C
↑
This is the specific heat capacity of copper
[tex]10 {}^{ - 16} M \: HCL \text{ \: is \: divided \: to \: 100 \: times \: its \: pH \: will \: be}[/tex]
Please Help me with this
25 Points_
[tex] \text{Given, Concentration of HCl}= 10 {}^{ - 6} M[/tex]
[tex] \text{After Dilution conc. of HCl =} \frac{10 {}^{ - 6} }{100} = {10}^{ - 8}M [/tex]
[tex] \therefore \text{pH = - log[H}^{ + } ][/tex]
[tex] \therefore \text{ pH }= - \log [{} {10}^{ - 8}] = 8[/tex]
[tex] \text{But} \: \text{This} \: \text{Is} \: \text{Not True Because} \\ \text{ An Acidic Solution Cannot have} \text{pH Greater than 7.} \\ \text{ In this case} [ {H}^{ + } ] \text{ Ions Of Water Molecule} \\ \: \text {Cannot Be Neglected.}[/tex]
Thus,[tex] {[H}^{ + } ] = {[H}^{ + } ] _{HCl} +{ [H + }^{ } ] _{H_2 O}[/tex]
As we know, ionic product[tex][H {}^{ + } ][OH {}^{ - } ] = 10 {}^{ - 14} \\ [H {}^{ + } ] = {10}^{ - 7} \\ [H {}^{ + } ] \text{total} = {10}^{ - 8} + {10}^{ - 7} \\ = {10}^{ - 8} (1 + 10) \\ = 11 \times {10}^{ - 8} [/tex]
[tex] \text{Now from, pH} = - \text{log}[H {}^{ + } ] \\ = \text{ - log}(11 \times {10}^{ - 8} ) \\ = - \text{ log}11 - \text{ log} {10}^{ - 8} \\ = 6.957[/tex]
Hope This Helps!!Water moves up a plant because of hydrogen bonds by a process called __________.
Answer:
transpiration
Explanation:
Transpiration is when water moves up a plant stem, because water has surface tension due to cohesion.
In water, the H is slightly positive and the O2 are both slightly negative. This creates bonds between the H and O of another molecule. This causes water to be sticky, and when water moves up a plant, other molecules are also pulled up.
Hope this helps!
i have a question so im working on a hydrology crossword puzzle and it says how acidic or basic a substance is and it only has 9 letters and its starts with p and the 3rd letter is b i need help
Answer: " PHBALANCE " .
_____________________
Explanation:
_____________________
The pH scale is logarithmic and indicates how acid or how basic a substance is.
ph balance ; as one word in a crossword puzzle,
with 9 letters ; P-H-B-A-L-A-N-C-E ; amounts to exactly 9 (nine) letters ;
And starts with a "P" ;
the 3rd letter is "B" .
_____________________
Source: Self-perception and tuition.
Hope this helps! Please let me know if the answer is correct; or if it makes sense!
_____________________
What is the density of a cube that has a mass of 25 grams and a volume of 125 cm3
To convert it in Kg/m³ divide by 1000 and multiple with 10⁶
[tex]Density = 0.2 \: \times \frac {{10}^{6} }{10 {}^{3} } = 0.2 \times {10}^{3} \\ Density = 200 \: kg \: m {}^{ - 3} [/tex]
How do we think that Mars lost atmospheric gas?
What basic planetary property would have had to be different for Mars to retain a thicker atmosphere?
the rocky planet was exposed to harsh and forceful solar winds, which blew the Martian atmosphere away.
Another option for thickening the atmosphere of Mars, and, in turn, raising the temperature of the planet, would be to set up solar-powered, greenhouse-gas producing factories.
Under what conditions does the Ideal Gas Law not apply and gases are considered real? Check all that apply. High pressure low pressure high temperature low temperature.
Considering the definition of ideal gas and gas laws, The Ideal Gas Law not apply and gases are considering real under conditions of high pressure low pressure.
Definition of ideal gasAn ideal gas is a theoretical gas that is considered to be composed of randomly moving point particles that do not interact with each other.
In other words, an ideal gas is defined as one in which all collisions between atoms or molecules are perfectly elastic and in which there are no intermolecular attractive forces, so they do not interact with each other.
Gases in general are ideal when they are at high temperatures and low pressures.
Definition of gas lawsOn the other hand, the gas laws are a set of chemical and physical laws that allow us to determine the behavior of gases in a closed system. The parameters evaluated in these laws are pressure, volume, temperature, and moles.
Summary
The Ideal Gas Law not apply and gases are considering real under conditions of high pressure low pressure.
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Answer:
its A and D
Explanation:
A student checks the air pressure in her bicycle tires early in the morning when it is cool outside. If she measures it again later in the day when it is hotter, what will she most likely observe? The pressure is the same. The pressure has increased. The pressure has decreased.
Answer:
answer in picture
Explanation:
When temperature increases, the air molecules gets energy. The air molecule starts moving randomly. The pressure is increased in the tire.
Define entropy?Entropy is defined as a measure of randomness or disorder of a system. disorder increases over time. Energy disperses.
In tire, it is filled with air molecules, its nothing but oxygen, nitrogen, sulpurdioxide, carbondioxide etc. when the outer side temperature increases, tire starts heating.
Heat is nothing but one type of energy, energy will transfer in to molecule. Molecule starts vibrating, hitting to walls this will increases the temperature and pressure increases.
Thus, if outer temperature increases. Pressure also increases.
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What could happen to nearby molecules if one side of a molecule has a temporary negative charge?
Answer:
The London dispersion force is a temporary attractive force that results when the electrons in two nearby atoms of two different molecules occupy positions that make the atoms form temporary dipoles (positive or negative charge).
Explanation:
1. Which location (a, b, or c) would have the highest temperature?
2. Which location(a, b, or c) would have the lowest temperature?
3. Give reasoning to explain how and why the latitude of a place on Earth affects its average temperature.
WORTH 100 POINTS! WILL MARK BRIANLESIT
Answer:
1. B
2.C
3.The further out and the closer the the equator a place on Earth is the warmer it is due to the fact that the sun directly hits countries on the equator and takes in heat faster then the north and south pole. Countries on more of a curve are colder due to the fact they are more curved and it is harder for the heat to be taken in at a curve.
B is center point line passing through earth and it's placed right infront of sun so b would have highest temperature
#2
A and C both are poles so at a and c least sun light can reach hence lowest temperature.
#3
As far as the latitude is placed from equator lower the temperatureAs near as the latitude is located from equator higher the temperature1.Which of these statements about the
conservation of mass is not correct?
A.The mass of the products will be equal to the
mass of the reactants.
B.During a chemical reaction, no mass is
created or destroyed.
C.There will be the same number and type of
atoms before and after a chemical reaction.
D.All of the above are correct.
What mass of sulfur is needed to react with iron in order to produce 42.0 grams of iron (III) sulfide?
Based on the stoichiometry of the reaction, 15.27 g of Sulfur are required to produce 42.0 g of FeS.
What is stoichiometry of a reaction??A stoichiometry of a reaction shows the ratio in which reactant molecules will combine to form products.
The balanced equation of the reaction is given below:
Fe + S -----> FeS
Molar mass of sulfur = 32 g
molar mass of iron = 56 g
molar mass of FeS = 88 g
32 g of sulfur produces 88 g of FeS
mass of sulfur that will produce 42.0 g of FeS = 32/88 * 42 = 15.27 g
Therefore, 15.27 g of Sulfur are required to produce 42.0 g of FeS.
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What makes a person scientifically literate? In three to five sentences, explain your answer.
It means that a person has the ability to describe, explain, and predict natural phenomena. Scientific literacy entails being able to read with understanding articles about science in the popular press and to engage in social conversation about the validity of the conclusions. Scientific literacy implies that a person can identify scientific issues underlying national and local decisions and express positions that are scientifically and technologically informed. A literate citizen should be able to evaluate the quality of scientific information on the basis of its source and the methods used to generate it. Scientific literacy also implies the capacity to pose and evaluate arguments based on evidence and to apply conclusions from such arguments appropriately.
hope this helps and sorry if this is wrong
At room temperature most elements are classified as.
I am assuming you are talking about their phase and in that case, they are mostly solid except for mercury and bromine.
Hope that helps!
2. When protein is digested by the body, what molecule do they become?
Answer:
Amino acid
Explanation:
When you eat food the body's digestive system breaks down the protein into the individual amino acids, which are absorbed and used by cells to build other proteins and a few other macromolecules, such as DNA
Determine if a water and a sound wave are both transversal waves.
Answer:
Sound waves are longitudinal waves
Water waves are transverse waves.
Hope this helps!
Question 1 of 10
What does the pH of a solution represent?
A. The pH indicates how acidic or basic a solution is.
B. The pH represents the partial pressure of hydrogen gas.
C. The pH is an indicator of the salt content of a solution.
D. The pH tells how quickly a reaction reaches equilibrium.
Dispersed colloids systems have the same _________________ (on the particles) which keep the particles dispersed.
Answer:
The dispersed particles of lyophobic colloidal systems have the same kind of electric charge. Particles with like charge repel each other and their mutual repulsion prevents them from joining together and settling out. The accumulation of similar kind of charges on the suspended particles holds them part and thus stabilizes the system.
Explanation:
( multi choice) ( science)
What are the ways that oxygen enters our body?
A. nose
B. mouth
C. ears
D. eyes
Answer:
you can also get oxygen from the mouth but you get more from the nose so i would chose nose
A compound containing only carbon and hydrogen is found to contain 80.0% carbon. It has a molecular weight of 30.0. What is its molecular formula
Answer:
(80.0, 20.0) The statement states that 80% of the compound is carbon. To acheive the amount of carbon in a 100 g sample, you need to multiply the weight of the sample by the percentage of carbon in the compound. Recall that 80%=80/100=.8 .8*100g=80g of carbon. The same process goes for the hydrogen. .2*100g=20g hydrogen. Explanation:
If you have 1 mole of methane gas, how many liters of methane gas do you have?
I have 22.4 litre of methane gas
The direct rays of the sun slowly move from 23.5° south to the
equator during what season?
Answer:
in December, so winter is the season
Identify the limiting reactant when 4.67g of SF4 reacts with 6.28g of IzOs to produce IFs and SO2.
I’m confused on what goes next.
How many atoms are in 1.14 mol of SO2?
2.05 x 10 ^24
The ph of water is approximately 7 which means it is:.
Answer: Neutral
Explanation: This is because, in the ph scale, greater than 7 indicates base or alkaline (basic), while less than 7 indicates that it is acidic.
Select the correct answer. A mixture consists of glucose and water. What is the percent composition of glucose in the mixture if it contains 1. 3 moles of glucose (C6H12O6) and the total mass of the mixture is 276 grams? A. 17. 7% B. 26% C. 35% D. 77% E. 85%.
Answer:
The percent composition of glucose in the mixture is 85 % (Answer E)
Explanation:
"percent composition of glucose = (mass of glucose / mass of the mixture) x 100
Step 1: calculate the mass of glucose ( C6H12O6)
mass of glucose = moles of glucose x molar mass of glucose
molar mass of C6H12O6 = [( 12 x6) + ( 1 x12) + ( 16 x6)= 180 g/mol
mass is therefore= 1.3 moles x 180g/mol = 234 grams
Step 2: calculate the percent composition
= mass of glucose /mass of mixture x 100
= 234 g/276 g x 100 = 85 %(answer E)"
Answer: the answer is E
Explanation: plato users
Heat from the earth is obtained by all EXCEPT:__________.
a. Gathering lava from volcanoes to boil water
b. Pumping hot spring water into homes and businesses
c. Steam from high pressure underground turn turbines
d. Drilling wells to bring hot water to the surface
We have that the source that does not produce Heat is
Drilling wells to bring hot water to the surface
Option D
Heat from the earthGenerally, Heat in this context speaks to a hot or high temperature of molecules from the earth body
Therefore,Gathering lava from volcanoes to boil water,Pumping hot spring water into homes and businesses are few example of ways the earth generate natural heat Whilst drilling wells to bring hot water to the surface is not an actual thing as water drilled out is not hot
Therefore, the source that does not produce Heat is
Drilling wells to bring hot water to the surface
Option D
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Abin is doing work by lifting a bowling ball. Which statement could be made about the energy in this situation? Energy is being transferred from the ball to his arm muscles. Energy is being transferred from his arm muscles to the ball. Energy would be recorded in units of hertz and power. Energy would change from potential to chemical.
Any capacity for doing work is called energy. It is a quantity and can be of various forms. Energy is getting transferred from arm muscles to the ball.
What are different forms of energy?Energy is the work done by the object to perform any given task and is dependent on the factors like the distance and the force applied.
When Abin lifts the bowling ball then the object is displaced from its original position and some amount of force is applied by the arm muscles.
The chemical energy stored in the arm of Abin is a form of energy and gets transferred to the ball from the muscles so it can be lifted.
Therefore, option B. energy is transferred from the arms muscles to the ball.
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Answer:
B. It is being transferred from his arm muscles to the ball.
Explanation:
got it right.
Question 1 (1 point)
Mackenzie adds sodium chloride and sucrose to water. Identify the solutes.
a
sodium chloride
b
water
с
sodium chloride and sucrose
d
sucrose
The solute in this case would be sodium chloride and sucrose.
SolutesSolutes are substances capable of dissolving in solvents to give homogenous mixtures known as solutions.
In this case, both sodium chloride and sucrose were added to water - water is acting as the solvent.
Sodium chloride is soluble in water and so also is sucrose.
Thus, a homogenous mixture of sodium chloride and sucrose would result.
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what is a substance that doesn't dissole in water
Answer:
insoluble substances
Explanation: