The particles of the gas move faster when you apply heat to a sample of gas.
WHAT IS A GAS?
A gas is one of the three states which matter can exist. A gas posseses no fixed shape or volume.
A gas is characterized by the ability to diffuse quickly through space because of the very weak attraction of its particles to one another.
WHAT DOES HEAT DO?
Heat (thermal energy) increases the kinetic energy i.e. energy due to motion of the particles, causing them to move faster. In the process, gas particles expands.
Therefore, when heat is applied to a sample of gas, the particles of the gas move faster.
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Every afternoon, Bill and Anita go down to the beach to fly their kite. They noticed that the wind always blows towards shore. Why is this? PLEASE HELP QUICKLY
The energy of ocean waves pushes air towards shore
Earth's rotation causes air to blow toward land
Ocean air is less dense, so it moves in to replace air over the land
Air over the beach heats up, rises, and is replaced by cool, denser ocean air
Answer:
the answer is D
Explanation:
Air over the beach heats up, rises, and is replaced by cool, denser ocean air
The ocean heats up much slower and becomes relatively cooler than the beach making it a high pressure zone. The air moves from the water to the land each morning forming a sea breeze. These pressure zones might equal out later in the day and the winds may diminish. ... A sea breeze blows from the ocean towards the beach.
A car is traveling at 9 m/s. The car's speed increases to 18 m/s in 3 s as it
passes a truck ahead of it. What is the acceleration of the car? Show your
work.
Your answer
HELPPPP PLS IM TAKING THIS QUIZ RIGHT NOW
Answer:
Acceleration = 3 meter per second square
Explanation:
Acceleration (A) = rate of change in velocity
so,
=》A =
[tex] \frac{18 - 9}{3} [/tex]
Where time = 3 seconds
=》
[tex] \frac{9}{3} [/tex]
=》
[tex]3[/tex]
so, acceleration =
[tex]3m {s}^{ - 2} [/tex]
If a reaction occurs between a compound that has a lemon smell and one that has a rose smell
what will the product smell like?
Leron Smell
Rose Smell
Smell?
+
A
The product will smell of lemon.
B
The product will smell of roses.
с
The product will have a lemon-rose smell.
OD
It is impossible to predict the smell of the product.
Answer:
f
Explanation:
fywuiw but I you to the t
Answer:
c
Explanation:
The materials or compounds that are changed into a new compounds in a chemical reaction are know as
Answer:
Reactants
Explanation:
They become known as reactants
Las células epiteliales del estómago producen ácido clorhídrico HCI y su producción en exceso puede producir perforaciones en la mucosa. Una de las maneras de controlar dicho exceso es tomando una solución de bicarbonato de sodio NaHCO3, porque *
Answer and Explanation:
El bicarbonato de sodio (o carbonato ácico de sodio, NaHCO₃) es utilizado como antiácido debido a que neutraliza al ácido clorhídrico (HCl) en el estómago. Al ser disuelto en agua, el NaHCO₃ se disocia en iones como sigue:
NaHCO₃ → Na⁺ + HCO₃⁻
El anión bicarbonato (HCO₃₋) sufre hidrólisis, aceptando H⁺ del agua y liberando iones hidroxilo (OH⁻):
HCO₃⁻ + H₂O → H₂CO₃ + OH⁻
Por lo tanto, la solución de NaHCO₃ es básica y sus aniones OH⁻ pueden neutralizar los H⁺ del HCl en el estómago, reduciendo la acidez.
Which of the following is not a property of water?
A. It is an excellent solvent.
B. It contains weak hydrogen bonds.
C. It is a nonpolar molecule.
D. It has a greater surface tension than most compounds.
11.7 g of NaCl and 4.5 g of KBr were dissolved
in 47 g of water. What is the molality of NaCl
in the solution?
Answer:
4.26m
Explanation:
Molality , m, is an unit of concentration in chemistry defined as the ratio between moles of solute (In this case, NaCl) and kg of solvent (In this case, water).
To solve the question we need to find the moles of NaCl and the mass of water in kg:
Moles NaCl -Molar mass: 58.44g/mol-:
11.7g * (1mol / 58.44g) = 0.200 moles
Mass of Water in kg:
47g * (1kg / 1000g) = 0.047kg
Molality is:
0.200 moles / 0.047kg =
4.26m
The volume occupied by a certain mass of methane gas (CH4)
at STP is 420 L. What will be its mass in grams at STP?
a
500 g
b 400 g
C 300 g
d None of the above
Answer: 300 g
Explanation: I guessed and got it right
420 liter of volume is occupied by 300 grams of methane gas at standard temperature and pressure (STP).
How we write the ideal gas equation at STP?Ideal gas equation of methane gas at STP (standard temperature pressure) can be written as:
PV = nRT, where
P = pressure = 1 atm
V = volume = 420 L (given)
R = universal gas constant = 0.082 L.atm / k.mole
T = absolute temperature = 273 K
n = no. of moles to find?
Putting all these values in the above equation and calculated for the n:
n = (1 × 420) / (0.082 × 273) = 18.76 moles
Now we calculate mass of methane by the definition of moles as:
n = W/M, where
M = molar mass of methane = 16 g/mole
W = to find?
W = 18.76 × 16 = 300.2 grams or 300grams.
Hence, option (c) is correct i.e. 300 grams of methane occupy 420 L volume.
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describe the properties of the compound in sugar, and Compare the properties of the
compound with the properties of the elements that comprise sugar. How do you explain the difference?
Answer: Sodium chloride is an ionic solid, and when it dissolves in water, its individual sodium and chloride ions are dissociated from one another. Sugar molecules, on the other hand, maintain the bonds between their constituent atoms when dissolved, and thus remain as whole molecules in the solution.
Explanation: Here's why: Salt is about 25% more dense than sugar. Therefore a teaspoon of salt weighs more than a teaspoon of sugar by almost 25%. Your dissolving test would not be accurate because you would be starting out with a larger mass of salt than sugar.
what is the number of electrons in the element Nickel
Describe Write your own caption for this photo.
Will give brainliest
Answer:
2 hard working men fix water spout for the community
Kevin is working on a model that shows the positions of Earth, the Moon, and the Sun during the phases of the Moon. How should he position them to show a New Moon?
FeCl3 + O2 = Fe2O3 +Cl2
Answer: FeCl3+O2-->Fe2O3+Cl2 is NOT balanced
Explanation:You first need to balance the equation. The balanced equation would be...
4FeCl3 + 3O2 ==> 2Fe2O3 + 6Cl2
moles FeCl3 present =4 moles
moles O2 present = 4 moles
Since the mole ration in the balanced equation is 4 FeCl3 : 3 O2, the limiting reactant will be FeCl3
moles Cl2 that can be produced = 4 moles FeCl3 x 6Cl2/4 moles FeCl3 = 6 moles Cl2
Answer:
what am i loooking at
Explanation:
Identify any incorrect formulas. Explain your answer.
a. Mg2(SO4)3
b. Rb3As
c. BeCl3
d. NaF
Wish I could award more points but I'm running low.
The formula of a compound is written based on the valency of each bonded atoms. The formulas Mg₂(SO₄)₃, Rb₃As are incorrect. Such compounds does not exist.
What is chemical formula?The formula of a chemical compound is written based on the number of atoms participated in bonding. Magnesium is second group element having two valence electrons.
Magnesium thus donates its two electrons into the bonding atom or group. The sulphate group SO₄ have a valency of 2 it gains two electrons from Mg when bonded.
Thus the formula of magnesium sulphate being MgSO₄ and not Mg₂(SO₄)₃. Similarly Rb is a second group metal having two valence electrons. Its valency being two. As is a halogen with valency one. Thus they cannot form a compound like Rb₃As.
Hence, option a and b are incorrect formulas.
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A solution is prepared by mixing 769 mL of ethanol with 507 mL of water. The molarity of ethanol in the resulting solution is 10.8 M. The density of ethanol at this temperature is 0.7893 g/mL. Calculate the difference in volume between the total volume of water and ethanol that were mixed to prepare the solution and the actual volume of the solution.
Answer:
57 mL
Explanation:
To make things clear, when 769 mL of ethanol were mixed with 507 mL of water, the resulting volume was not (769+507) 1276 mL, but a lower value. This is because of the interactions between liquid molecules.
First we calculate how many grams of ethanol are there in 769 mL, using the given density:
mass = density * volume0.7893 g/mL * 769 mL = 606.97 g ethanolThen we convert 606.97 g of ethanol into moles, using its molar mass:
606.97 g ÷ 46.07 g/mol = 13.17 molNow we calculate the actual volume of the solution, using the definition of molarity:
Volume = Moles / Molarity13.17 mol / 10.8 M = 1.219 LFinally we convert 1.219 L to mL, and calculate the difference in volume:
1.219 L * 1000 = 1219 mL1276 mL - 1219 mL = 57 mLThere are ___________ of different kinds of proteins in the human body?
Answer:
In humans, up to ten different proteins can be traced to a single gene. Proteome: It is now estimated that the human body contains between 80,000 and 400,000 proteins. However, they aren't all produced by all the body's cells at any given time. Cells have different proteomes depending on their cell type.
Explanation:
Proteins are macromolecules that are complex structures made of monomeric units. There are 20,000 - 60,000 different kinds of proteins in the human body.
What are proteins?Proteins have been the large molecules (macromolecules) that are structurally composed of the monomers or the smaller units. They have been composed of amino acids.
The amino acids are produced by the translational process and are linked by the peptide bonds. They are the most essential compound for the cellular and physical activity of the cells in living organisms.
The proteome is used to identify and classify the various proteins that can range from 20,000 - 60,000 in a human body. These proteins are involved in performing the functions in the body.
Therefore, approximately 20,000 - 60,000 proteins are found in the human body.
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If 5 times a number is increased by 4 the result is 19 find the lest possible number that satisfies theses condition
Answer: 3
Explanation: 5 times a number would be 5x, then increase that by 4 is 5x+4. The problem then says 5x + 4 ≥ 19. If we solve for x then we get x ≥ 3 so x has to be greater than or equal to 3, so the smallest number it could be is 3. You can even try any number smaller than 3 and see it doesn't work. even something like 2.9
How many electron shells does a neon atom have?
Answer:
2 electron shells
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Which characteristic of sound makes it possible for bats to fly in the dark without hitting any objects?
A.refraction
B.reflection
C.conduction
D.amplification
conduction is the characteristic of sound makes it possible for bats to fly in the dark without hitting any objects
what are the properties of a sound ?one of the property of sound is pitch which is an important property where the perception of frequency of sound take place by human ear within the range of human hearing, higher is the frequency of the sound the higher will be its pitch and a lower frequency means a lower pitch.
The loudness of sound is another property can be determined by amplitude which is a measure of the magnitude of the maximum disturbance of sound.
The speed of the sound is the sound waves travel through the medium is called the speed of sound and it is different for different mediums, travels fastest in solids.
When sound waves hit the solid it reflects back to the same medium as it follows laws of reflection.
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HELP WITH SEINCE PLEASE!!
Answer:
temperate
Explanation:
2. Katelyn is drinking a glass of tea. As the tea sits in the sun it begins to warm up. To
cool it back off again, she puts more ice in the glass.
After she puts ice in the glass, the ice tea cools down. What is occurring to the heat
in the glass?
AnswerB:
Explanation:
Heat can travel from one place to another in different ways. The different methods of heat transfer are conduction, convection and radiation. Here heat transfers from the glass to the ice through conduction.
What is conduction?The process of transmission of energy from one particle of the medium to another with the particles being in direct contact with each other is defined as the conduction. It is also known as the thermal conduction or heat conduction.
In conduction an area of higher kinetic energy transfers thermal energy towards the lower kinetic energy area. Here a transfer of heat energy occurs from tea molecules to the ice cube. Due to the transfer of heat melting of ice occurs.
As the ice melts, the tea starts cooling while heating the ice cube. So the ice cools down the tea. The tea will be melted by the ice here.
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What do acids do in solution?
Which equation shows the correct relationship between mechanical energy, kinetic energy, and potential energy?
Answer:
first answer
Explanation:
Fe2O3 + 3 C ---> 2 Fe + 3 CO
How many g Fe will form from 72 g C ?
molar mass Fe = 55 g/mol
molar mass C = 12 g/mol
A: 220
B: 55
C: 495
D: 0.87
Answer:
220g
Explanation:
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An atom of a mystery element contains 6 protons, 6 electrons, and 8 neutrons.
What is the mass number?
Answer:
14
Explanation:
Mass number is just the value of the protons and neutrons added, in this case its 14
If 2.50 grams of ethane is allowed to react with 5.00 grams of oxygen how many grams of water would be expected?
Answer:
The mass of water produced is 4.29 g.
Explanation:
Given;
reacting mass of ethane, C₂H₆ = 2.5 g
reacting mass of oxygen, O₂ = 5.0 g
The balanced combustion reaction is given as follows;
2C₂H₆ + 7O₂ ----------------> 4CO₂ + 6H₂O
Based on the balanced equation above;
requires
7.0 moles of oxygen -----------------------> 2.0 moles of ethane
requires
5.0 g of oxygen --------------------------> x gram of ethane
x = (2 x 5) / 7
x = 1.43 g
Ethane is in excess of 1.07g (2.5 g - 1.43g)
Now, determine the mass of water produced by 1.43 g of ethane;
requires
2.0 moles of ethane -----------------------> 6.0 moles of water
requires
1.43 g of ethane --------------------------> y gram of water
y = (6 x 1.43) / 2
y = 4.29 g
Therefore, the mass of water produced is 4.29 g.
How many grams of molecular chlorine will be required to completely react with 0.0223 moles of sodium iodide according to the following reaction?
2Nal + Cl2 ---> 2NaCl + I2
A. 1.57 104 grams
B. 3.16 grams
C. 0.0112 grams
D. 0.791 grams
The amount of chlorine will be 0.791 gram required to completely react with 0.0223 moles of sodium iodide .
The given chemical reaction is :
2Nal + [tex]Cl_{2}[/tex] → 2NaCl + [tex]I_{2}[/tex]
It is given that:
Amount of sodium iodide = 0.0223 mol.
Atomic mass of chlorine = 35.45 g.
The amount of chlorine can be calculated as:
0.0223mol. NaI × (1mol. Cl₂/2mol. NaI) × (35.45g/1mol. Cl2)
=0.791 grams
Therefore, the correct answer will be option (D).
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A sample of nitrogen (N2) gas in a 10.0L container has a
pressure of 1.0 atm at 297 K. Assuming ideal gas behavior,
what will the pressure be if the same amount of nitrogen
gas is put into a 5.0L container at 297 K?
Answer: The pressure of nitrogen will be 2.0 atm
Explanation:
According to ideal gas equation:
[tex]PV=nRT[/tex]
P = pressure of gas = 1.0 atm
V = Volume of gas = 10.0 L
n = number of moles = ?
R = gas constant =[tex]0.0821Latm/Kmol[/tex]
T =temperature =[tex]297K[/tex]
[tex]n=\frac{PV}{RT}[/tex]
[tex]n=\frac{1.0atm\times 10.0L}{0.0820 L atm/K mol\times 297K}=0.41moles[/tex]
Now again using ideal gas equation :
[tex]P=\frac{nRT}{V}=\frac{0.41mol\times 0.0821Latm/Kmol\times 297K}{5.0L}=2.0atm[/tex]
Thus pressure of nitrogen will be 2.0 atm
Chemistry Challenge
Imagine someone who had never seen a city before.
They have lived their entire life alone, in a cave.
Answer
How could you get them to understand a city without
taking them there?
.
Students, write your response!
Pear Deck Interactive Slide
Do not remove this bar
Answer:
I will draw how the city looks like
what is the name of the molecular compound SF
Answer:
Sulfur tetra fluoride
Explanation: