Which of these will change if the air in a
closed bottle is heated?
A
B
C
D
the mass of the air
the composition of the air
the air pressure in the bottle
the number of air molecules in the bottle​

Answers

Answer 1

Answer:

The air pressure in the bottle will change.

Explanation:

According to Gay-Lussac's Law, one of the main gas laws, the pressure of gas is directly proportional to the temperature of the gas. This means that as the temperature of the gas increases, the pressure of the gas will increase as well. Therefore, if you heat a closed bottle, the air pressure inside the bottle will change (increase).


Related Questions

Which of the following are characteristics of atoms and molecules in the gaseous state?
1. They expand as the temperature is increased.
II. They are compressible.
III. They have high densities.
IV. They are miscible.
e. I, II, and IV
a. I and II
b. I, II, and III
C. I and IV
d. I and III​

Answers

I and III​ are characteristics of atoms and molecules in the gaseous state.

Hence, option D is correct.

What is an atom?

An atom is any particle of matter which contains at least one proton.

The gas expands as the temperature increases and has high densities.

The temperature of a gas will increase and the density will decrease as it

expands.

The expansion of gas occurs as a result of an increase in the elastic

collision of the atoms.

This is a result of the increase in temperature which causes the atoms to be more spatially arranged.

The density of gas also reduces as a result of the same number of gas

molecules occupying more volume.

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Final answer:

Gasses expand as temperature increases, are compressible, and are miscible, but do not have high densities. The answer to the characteristics of gaseous atoms and molecules is e. I, II, and IV.

Explanation:

Atoms and molecules in the gaseous state exhibit several characteristic properties. Firstly, they expand as the temperature is increased. This expansion is due to the increased kinetic energy of the gas particles, causing them to move further apart. Secondly, gases are indeed compressible because of the large amount of space between the gas particles, which can be reduced under pressure. However, they do not have high densities; gases are much less dense than solids or liquids. Finally, gases are miscible, meaning they can mix together to form a homogeneous mixture, like air, which is a mixture primarily of nitrogen and oxygen.

Taking these points into consideration, the correct answer to the student's question about the characteristics of atoms and molecules in gases would be options I (They expand as the temperature is increased), II (They are compressible), and IV (They are miscible). Therefore, the answer is e. I, II, and IV.

How many liters of oxygen gas, at standard
temperature and pressure, will react with 35.8 grams of
iron metal?
4 Fe (s) + 3 O2 (g) → 2 Fe2O3 (s)​

Answers

Answer:

Explanation:

For the balanced reaction:

4Fe(s) + 3O₂(g) → 2Fe₂O₃(s)​.

It is clear that 4 mol of Fe react with 3 mol of O₂ to produce 2 mol of Fe₂O₃.

Firstly, we need to calculate the no. of moles of 35.8 grams of Fe metal:

no. of moles of Fe = mass/molar mass = (35.8 g)/(55.845 g/mol) = 0.64 mol.

Now, we can find the no. of moles of O₂ is needed to react with the proposed amount of Fe:

Using cross multiplication:

4 mol of Fe is needed to react with → 3 mol of O₂, from stichiometry.

0.64 mol of Fe is needed to react with → ??? mol of O₂.

∴ The no. of moles of O₂ needed = (3 mol)(0.64 mol)/(4 mol) = 0.48 mol.

Finally, we can get the volume of oxygen using the information:

It is known that 1 mole of any gas occupies 22.4 L at standard P and T (STP).

Using cross multiplication:

1 mol of O₂ occupies → 22.4 L, at STP conditions.

0.48 mol of O₂ occupies → ??? L.

∴ The no. of liters of O₂ = (0.48 mol)(22.4 L)/(1 mol) = 10.752 L.

Transportation is the largest single source of air pollution in the United States. Air pollution can harm the environment and human health. Which technology could offer a solution to this problem? mufflers that reduce noise motors that run on electricity tires that improve gas mileage

Answers

Answer:

- motors that run on electricity

- tires that improve gas mileage

Explanation:

The transportation is a major polluter of the air. The big problem with it is that it is necessary for the humans to be able to live and function properly, as the trade is happening through it, thus it is crucial for the economy. In order to stop or reduce the negative impact on the air quality, there are some solutions which can help. The motors that can run on electricity are an excellent method, as the production of electricity is not polluting the are as the fossil fuels are. The only problem is that this type of motors are still very expensive, so once their price is on pair with the combustion motors they can be used. Tires that are able to increase the efficiency of the transportation means can also be useful, as they will be able to reduce the amount of pollutants released into the atmosphere, because the transportation will use less fossil fuels for the same mileage.

Answer:

Explanation:

Under the sector of transportation passenger vehicles are the major contributor to the pollution. Emission from cars and two-wheeler is the leading cause of increasing level of carbon dioxide, sulfur content and other greenhouse gases.

Solution to this problem include:

Increase in usage of electric vehicles as seen in Norway.Better tires which can improve the fuel mileage.Encourage usage of public transport.

1s22s22p63s23p64s23d104p5 Which element is this?

Answers

Explanation:

As the given electronic configuration is [tex]1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{2}3d^{10}4p^{5}[/tex]. This shows that there are in total 35 electrons and 7 valence electrons.

Also, we know that bromine is the element that has atomic number 35. And, since it belongs to group 17 so it has 7 valence electrons.

Thus, we can conclude that the given element is bromine.

The element with the electron configuration 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁵ is Bromine. This can be deduced by counting the total number of electrons, which is 35. Bromine is in Group 17 and Period 4.

The element with the electron configuration 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁵ is Bromine (Br). To determine this, you can count the total number of electrons, which add up to 35. Bromine is located in Group 17 (VIIA) and Period 4 of the periodic table.

Here is a breakdown of the electron configuration:

1s²: 2 electrons2s² 2p⁶: 8 electrons3s² 3p⁶: 8 electrons4s² 3d¹⁰ 4p⁵: 17 electrons

Adding these up results in a total of 35 electrons, confirming it is Bromine.

Complete Question - What is the element with the following electron configuration? 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁵

35. In the collision theory, a collision that leads to the formation of products is called an
_.(2 words)​

Answers

Answer:

It's Effective Collision.

Explanation:

Hope my answer has helped you!

define molecules as it relates to molecular substances and compounds​

Answers

Answer:

molecules are 2 atoms held together by chemical bonds, compunds are 2 atoms from more than one element held together by chemical bonds.

Molecule is the combination of two or more different atoms and Group of similar molecules forms compound.

What are the properties of a Molecule ?

Molecule is an electrically neutral group of two or more atoms held together by chemical bonds.

A molecule is the smallest particle into which an element or a compound can be divided without changing its chemical and physical properties.

Therefore, Molecule is the combination of two or more different atoms and Group of similar molecules forms compound.

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How many grams of aluminum will there be in 98g of Al2O3?

Answers

Answer:

51.88 grams

Explanation:

make it in ratio form

Al=27×2=54.

54:48

(54/102)×98

=51.88 grams

O=16×3=48

(48/102)×98

=46.12 grams

why are halogens kept in the group 17 of modern peroidic table?​

Answers

The halogens are all elements that are found in group 17 of the periodic table. The halogens include fluorine, chlorine, bromine, iodine, and astatine. All of these elements are considered to be reactive nonmetals. Atoms of an element react with other atoms based on the number of electrons found in their outer orbit.

Halogens are in Group 17 of the periodic table because they have seven valence electrons, making them highly reactive as they seek one more electron to achieve a full octet. Their ability to readily form singly negative ions and salts when reacting with metals further characterizes their group placement.

Halogens are kept in Group 17 (also known as Group VIIA) of the modern periodic table because of their distinctive chemical properties. Each halogen has seven valence electrons (a p⁵ configuration in their outermost p subshell), which is just one electron short of completing their outer shell. Thus, they are highly reactive, as they need only one additional electron to achieve a stable, noble gas electron configuration.

The reactivity of halogens also allows them to form singly negative ions, such as Cl-, by accepting an extra electron into the vacancy in their outer p subshell. This contrasts with alkali metals that reside in Group 1, which easily give up their single s electron to form singly positive ions like Na+. Because halogens readily combine with metals to form salts, such as sodium chloride, they are known as "salt-forming" or halogens.

Moreover, the physical states of halogens at room temperature are diverse: chlorine is a gas, bromine is a liquid, and iodine and astatine are solids. This variation doesn't affect their placement in Group 17, which is based on their shared electronic configuration and chemical properties.

What is enthalpy? the total concentration of the system the total heat content of the system the total pressure of the system the total internal energy of the system

Answers

Answer:

The total heat content of the system.

Explanation:

Enthalpy is a thermodynamic quantity equivalent to the total heat content of a system.Enthalpy is equal to the system's internal energy plus the product of its pressure and volume. In a system enclosed so as to prevent matter transfer, for processes at constant pressure, the heat absorbed or released equals the change in enthalpy.

So, the right choice is: The total heat content of the system.

During which months do both the northern and Southern Hemisphere receive the same amount of energy from the sun

Answers

Answer:b

Explanation:

Answer:

March and September

Explanation:

During equinox, which occurs every year approximately on 21st March and on 22nd September, the day length and the night length are both 12 hours. This happens because the sun is directly overhead the equator. As a consequence both Hemispheres receives the same amount of energy from the Sun.

Both amines and amides are derivatives of ammonia. True False

Answers

Answer:

It is true that both amides and amine are the derivatives of ammonia.

Explanation:

Amines are the derivatives of ammonia [tex]\text{(NH_3)}[/tex] where nitrogen atom makes bond to 1, 2, or 3 alkyl or aromatic groups of compounds. Amides are the amino group [tex]\text{(-NH_2)}[/tex], which is derived from ammonia, replaces the hydroxyl group [tex]\text{(-OH)}[/tex] in a carboxylic acid.

The simplest amides are the proper derivation of ammonia whereas the higher degree amides are the derivation of secondary amine.  

Final answer:

The statement is correct. Amines and amides are in fact derivatives of ammonia. Amines are derived from ammonia by replacing hydrogen atoms by alkyl or aryl groups, while amides are derived by replacing one hydrogen with an acyl group.

Explanation:

Yes, the statement is correct. Amines and amides are indeed derivatives of ammonia.

Amines are organic compounds which are derived from ammonia by replacing one or more hydrogen atoms by alkyl or aryl group. For example, methylamine CH3NH2 is an amine where one hydrogen atom is replaced by a methyl group.

Amides, on the other hand, are organic compounds derived from ammonia by replacing one hydrogen atom by an acyl group. An example of an amide is acetamide CH3CONH2 where one hydrogen atom of ammonia is replaced by an acetyl group.

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Which of these discoveries contradict components of Dalton’s atomic theory? Check all of the boxes that apply.

Atoms contain smaller particles: protons, neutrons, and electrons.

Atoms of a given element can bond to other atoms only in specific ways.

Atoms of a given element can have different numbers of neutrons.

Nuclear reactions can change an atom of one element into an atom of another element.

All atoms of a given element have the same number of protons.

Answers

Answers:

Nuclear reactions can change an atom of one element into an atom of another element. ( fourth choice)

Atoms contain smaller particles: protons, neutrons, and electrons.( first choice)

Atoms of a given element can have different numbers of neutrons.( third choice)

Answer:

Atoms contain smaller particles: protons, neutrons, and electrons.

Atoms of a given element can have different numbers of neutrons.

Nuclear reactions can change an atom of one element into an atom of another element.

All atoms of a given element have the same number of protons.

Explanation:

Electrons, protons, and neutrons, and isotopes had not yet been discovered.

The only statement that agrees with Dalton's atomic theory is  

B. Atoms of a given element can bond to other atoms only in specific ways. Dalton used this postulate to formulate the Laws of Definite Composition and of Multiple Proportions.

Chemical reaction to distinguish 1 butyne and 2 butyne

Answers

Answer:

1-butyne and 2-Butyne are distinguished by  : -

"Tollins reagent test ".

1-butyne gives tollins reagent test but  2-Butyne doesn't.  

Explanation:

You can Refer to attachment.  

Write the balanced
chemical equation for the reaction. If a plant has 88.0 g carbon diox-
ide and 64.0 g water available for photosynthesis, determine
a. the limiting reactant.
b. the excess reactant and the mass in excess.
c. the mass of glucose produced.

Answers

Final answer:

The balanced chemical equation for photosynthesis is 6CO2(g) + 6H2O(l) → C6H12O6(s) + 6O2(g), with water being the limiting reactant and carbon dioxide in excess. The mass of excess CO2 and the mass of glucose produced is determined by stoichiometric calculations.

Explanation:

The balanced chemical equation for photosynthesis is 6CO2(g) + 6H2O(l) → C6H12O6(s) + 6O2(g). This shows that carbon dioxide (CO2) and water (H2O) react to form glucose (C6H12O6) and oxygen (O2). To find the limiting reactant, you convert the masses given for CO2 and H2O to moles using their respective molar masses (44.01 g/mol for CO2 and 18.02 g/mol for H2O). You would find that water is the limiting reactant because there are fewer moles of H2O than CO2 when compared to the stoichiometric coefficients in the balanced equation.

To find the excess reactant, subtract the amount of CO2 that would react with the available H2O from the initial amount of CO2 to determine the mass in excess. For the mass of glucose produced, use the mole ratio from the balanced equation, multiplied by the number of moles of the limiting reactant and then by the molar mass of glucose (180.16 g/mol).

A student will measure and record the growth of two flowering plants every day for 28 days. Plant A will be watered and fertilized, Plant B will only be watered. The student predicts fertilizer added to the soil leads to taller flowering plants. Scientific conclusions are based on scientific evidence, what evidence would support the student’s prediction?

Answers

Answer:

If Plant A grows taller than Plant B

Explanation:

because plant A is being fertilized whereas plant B isn't

WILL GIVE BRAINLIEST TO THE FIRST CORRECT ANSWER! UWU
Which of the following is an element??? ​

Answers

Answer:

B) C2

Explanation:

C2 is oxygen and oxygen is an element :)

Answer:

A is water

B is an oxygen molecule

C is an organic compound

The answer is B

How does the atmosphere help to make Earth livable? Check all that apply.
causes the seasons
contains oxygen
provides warmth
creates important nutrients
blocks harmful energy from the Sun
Plz help like ASAP!!!

Answers

Answer:

- contains oxygen

- provides warmth

- blocks harmful energy from the Sun

Explanation:

The atmosphere is crucial when it comes to providing living conditions on Earth. The gases in the atmosphere manage to balance the things just about right, so that the life can thrive. The atmosphere has oxygen, the gas that is used by pretty much every organism to be able to function. With its greenhouse gases, the atmosphere manages to trap the heat inside, thus providing warmth to the Earth. The numerous layers of the atmosphere manage to block in big portion the harmful energy from the Sun, with a special accent on the ozone layer, a layer that manages to stop most of the UV radiation.

Answer: Contains oxygen, provides warmth, blocks harmful energy from the Sun

Explanation:

it they main important to live on earth

How many moles of HCI would be required to produce a total of 2 moles of H2

Answers

Answer:

Should be 4 moles.

What does the symbol H stand for

Answers

Answer:

enthalpy

Explanation:

If it is used with a triangle in front, (delta H), that means the change in enthalpy. Delta H= (m)(s)(Delta T).  m=mass of products, s=heat of the products, Delta T = change in temperature.

Hope that helps

Why should the scientific method be used to answer a question?

A. It provides a way to test an idea without any bias.
B. It provides a way to test a hypothesis.
C. It provides a way to ensure all hypotheses are proven correct.
D. It provides a way to quickly turn a hypothesis into a scientific
theory.

Answers

Answer:

B

Explanation:

The whole method is a step by step way to testing a hypothesis.

The scientific method is used to answer a question and it provides a way to test a hypothesis. Hence, option B is correct.

What is a hypothesis?

A hypothesis in a scientific context is a testable statement about the relationship between two or more variables or a proposed explanation for some observed phenomenon.

To test the hypothesis, we need to make an observation or perform an experiment associated with the prediction.

The Scientific Method helps you put together experiments, use data to find conclusions and interpret them.

Hence, It provides a way to test a hypothesis.

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What is the morality of 2.50 L of solution that contains 1.85 mol of anhydrous sodium tetraborate?

Answers

That would just be 1.85 mol divided by 2.5L. So 0.74 mol/L or 0.74 M.

The morality, or molarity, of a 2.50 L solution containing 1.85 mol of anhydrous sodium tetraborate is calculated by dividing the amount of solute by the volume, yielding a concentration of 0.74 M.

The morality of a 2.50 L solution containing 1.85 mol of anhydrous sodium tetraborate refers to its molar concentration, which is expressed in moles per liter (mol/L). To find the morality, also known as molarity, you would divide the number of moles of solute by the volume of the solution in liters.

Molarity (M) = moles of solute / volume of solution in liters

Therefore, the molarity of the sodium tetraborate solution is:

M = 1.85 mol / 2.50 L

M = 0.74 M

Which kind of weather usually forms over the northwest United States in the summer because of maritime polar air masses?

1 )fog
2)dry heat
3) heavy snow
4) heavy rain

Answers

as someone who lives in the northeast, we get a lot of fog in the summer.

snow - we don’t get in summer

rain - we’ve recently been getting a lot of rain but i think it’s because of global warming, but either than that it’s mainly in the spring of april.

dry heat - we mainly have humid heat vs. dry heat

so that leaves us with fog.

vote brainliest if this helped! :)

Answer:

1 )foggy.

Explanation:

As air mass is a large body of air that remains stable over the area for a larger period like days or weeks it produces heat exchange on land and as well on waters.  As maritime polar air masses (M.P) are cool and moist hence they bring cloudy and damp weather to the USA covering the northern Atlantic and Northern Pacific oceans, mostly influenced by the pacific northwest and northeast air masses. They can form any time of the year and are not as cold as the continental polar air masses.

The density of iron is 7.8 g/cm3 and that of aluminum is 2.7 g/cm3. Using a balance, you find that a block of iron has the same mass as a block of aluminum. Which block has the LARGER volume?

Question 15 options:

You cannot tell from the information given.


The volumes are the same.


The iron block


The aluminum block
2.) As water in an ice cube tray freezes,

Question 23 options:

it absorbs energy from its surroundings.


its surroundings absorb energy from it.


it absorbs coldness from and releases energy to its surroundings.


it only absorbs the coldness from its surroundings.


it neither absorbs nor releases energy, because its temperature stays constant.

Answers

Answer:

1.The Aluminum block

2.its surroundings absorb energy from it.

Explanation:

In this question it is important to remember that density of an object is the mass of that object divided by its volume.

The expression applied here is density=mass/volume

Given that the mass is constant,lets say mass= m=1g

and density of aluminum=2.7g/cm³ and that of iron is 7.8 g/cm³ then volume=?

Volume=mass/density

Volume of aluminum= 1/2.7 =0.3704 cm³

Volume of iron = 1/7.8 =0.1282 cm³

Here we see volume of Aluminum block is the largest.

2.As water in an ice cube tray freezes, its surroundings absorb energy from it.When the water freezes, latent heat of freezing is given out to the surrounding.When water is freezing, it stays at a constant temperature of 0°C, the heat energy released ensures that there is no cooling past 0 °C.

If a stack of 1,008 alkali fuel cells in series generates 14,800 W of power, and each cell contributes equally to the power of the stack, how much power does each cell contribute? (Write the answer to one decimal place.)

Answers

Answer:

I got 14.7 W each

14,800 divided by 1,008 is 14.682539 which is 14.7 to 1dp. Sorry if this is wrong.

Answer: 14.7

Explanation: I got it correct.

A fish has armored plates that enable it to handle the extreme pressure in the deepest, darkest aquatic ecosystem.

Where is this fish adapted to live?

Answers

Answer:

the open ocean

Explanation:

i just took the test on edge

which is a characteristic of mixtures?

Answers

Answer:

The correct answer is "They can be separated by physical processes"

Explanation:

The definition of Mixtures is the blending of two or more dissimilar substances.

Mixtures can be divided into those that are homogeneous or heterogeneous meaning that they can be distributed evenly or can't be distributed evenly.

This correct Sancerre is that they can be separated by a physical process

how many molecules of water are in 345g

Answers

Answer:

1.15 molecules

Explanation:

To get to molecules, you need to first convert grams into moles, then moles into molecules.

345g of water x [tex]\frac{1 mol }{18.02g}[/tex]

This will get you the moles of water. (The number 18.02 came form the molar mass of water which is H2O)

I MOLE EQUALS AVOGADRO'S NUMBER

19.15 mol of water x[tex]\frac{6.022*10^{23}molecules }{1 mol}[/tex]

= 1.15

Answer:

There are [tex]1.1542\times 10^{25} [/tex] molecules of water are in 345 grams.

Explanation:

[tex]n=\frac{m}{M}[/tex]

[tex]N=n\times N_A[/tex]

Where:

m = mass of compound

M = Molar mass of compound

N = Number of particles / atoms/ molecules

n = Number of moles

[tex]N_A=6.022\times 10^{23} mol^{-1}[/tex] = Avogadro's number

Mass of water = m =  345 g

Molar mas of water = M = 18 g/mol

[tex]n=\frac{345 g}{18 g/mol}=19.167 mol[/tex]

Number of molecules of water = N

[tex]N=19.167 mol\times 6.022\times 10^{23}mol^{-1}[/tex]

[tex]N = 1.1542\times 10^{25} molecules[/tex]

There are [tex]1.1542\times 10^{25} [/tex] molecules of water are in 345 grams.

Complete the paragraph to describe the characteristics of a silicon tetrahydride molecule (SiH4). The Lewis structure and table of electronegativities are given.



The bond polarities of SiH4 are , the molecular shape is , and the molecule is .

Answers

Answer : the bond polarities of SiH4 are polar,
the molecular shape is tetrahedral with symmetric charge distribution around the central atom, the molecule is non polar.

Answer:

PLATO: Polar, Tetrahedral, NonPolar

Explanation:

If an atom has 12 protons and 13 neutrons

Answers

Answer:

MAGNESIUM  

Explanation:

The element with the atomic number 12 is magnesium if an atom has 12 protons and 13 neutrons.

What is a proton?

A proton is a subatomic particle found in the nucleus of every atom.

The mass number of an isotope is the sum of the protons and neutrons in its atomic nuclei. And it is given that an atom has 12 protons and 13 neutrons. So we need to find out the atomic number of the atom.

If we know the mass number (A) and the number of neutrons (N), we can calculate the atomic number (Z) by subtracting the number of neutrons from the mass number.

A−N=Z

25−13=12

The atomic number of the element is 12.

Atomic number is the number of protons in the nuclei of all atoms of an element.

The element with the atomic number 12 is magnesium.

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Which of the following fossils are trace fossils?

Answers

Trace fossils may consist of impressions made on or in the substrate by an organism: for example, burrows, borings, footprints and feeding marks, and root cavities. Trace fossils contrast with body fossils, which are the fossilized remains of parts of organisms' bodies, usually altered by later chemical activity or mineralization.

Hope this helps! :D

Answer:

footprint

Explanation:

I know you can choose more than one anwer but that it is the only answer that makes sense

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