Clothes Made Of Synthetic Fibres Should Not Be Worn In__ (2024)

Answer:

A. N₂O₅ is produced at 0.2 mol·L⁻¹s⁻¹, and O₂ is produced at 0.05 mol·L⁻¹s⁻¹.

Explanation:

2N₂O₅ ⟶ 4NO₂ + O₂

For every two molecules of N₂O₅ that disappear, we get four molecules of NO₂ and one of O₂.

NO₂ is forming twice as fast, and O₂ is forming half as fast, as N₂O₅ is decomposing.

N₂O₅ is decomposing at a rate of 0.1 mol·L⁻¹s⁻¹.

So, N₂O₅ is produced at 0.2 mol·L⁻¹s⁻¹, and O₂ is produced at 0.05 mol·L⁻¹s⁻¹.

Answer:

NO2 is produced at 0.2 M/s, and O2 is produced at 0.05 M/s.

Explanation:

Answer:

Ca3N2

Explanation:

Answer:

1. Hydrogen will diffuse faster.

2. The ratio of diffusion of hydrogen gas to that of the unknown gas is 4 : 1

Explanation:

Let the rate of diffusion of hydrogen gas, H2 be R1

Let the molar mass of H2 be M1

Let the rate of diffusion of the unknown gas be R2.

Let the molar mass of the unknown gas be M2.

Molar mass of H2 (M1) = 2x1 =2g/mol

Molar mass of unknown gas (M2) = 16 times that of H2

= 16 x 2 = 32g/mol

1. Determination of the gas that will diffuse faster. This is illustrated below:

R1/R2 = √(M2/M1)

R1/R2 = √(32/2)

R1/R2 = √16

R1/R2 = 4

Cross multiply

R1 = 4R2

From the above calculations, we can see that the rate of diffusion H2 (R1) is four times the rate of diffusion of the unknown gas (R2).

Therefore, hydrogen will diffuse faster.

2. Again, from the calculations made above, the ratio of diffusion of hydrogen (R1) to that of the unknown gas (R2) is given by;

R1/R2 = 4

Therefore, the ratio of diffusion of hydrogen (R1) to that of the unknown gas (R2) is:

4 : 1

Answer:

Rayon

Explanation:

Rayon developed for the first time in the late 19th century as a replacement for silk. Silk was expensive in those days as was an organic product made out of cocoons. Rayon was the first man-made fibre came to be known as an artificial textile material formed from cellulose obtained from plants. Rayon was a less expensive option for silk clothing and accessories.

Answer:

Explanation:

During a full moon, when the earth moves between the moon and sun a lunar eclipse will occur.

Answer:

Had 3.612 x 10²⁴ ions (Not too sure of the answer )

Explanation:

But anyway heres My approach.

mole of sodium is 6 .

If 1 mole gives 6.02x10²³ ions

then 6moles will be = x ions

x ions = 6 x 6.02x10²³ / 1 mole

x = 3.612x10²⁴ ions

Explanation:

When writing chemical equations for reversible reactions, the usual one-way arrow is not used. Instead, two arrows are used, each with just half an arrowhead - the top one pointing right, and the bottom one pointing left.

For example:

ammonium~chloride \rightleftharpoons ammonia + hydrogen~chloride

NH_{4}Cl(s) \rightleftharpoons NH_{3}(g) + HCl(g)

Answer:

To determine whether a substance is an acid or a base, count the hydrogens on each substance before and after the reaction. If the number of hydrogens has decreased that substance is the acid (donates hydrogen ions). If the number of hydrogens has increased that substance is the base (accepts hydrogen ions).

Answer:

Carbon dioxide is a very soluble gas. It dissolves readily in water. As the oceans formed, carbon dioxide dissolved to form soluble carbonate compounds so its amount in the atmosphere decreased. Carbonate compounds were then precipitated as sedimentary rocks, eg limestone.

Uptake by living organisms

Carbon dioxide was also absorbed from the oceans into photosynthetic algae and plants. Many of these organisms, and the simple organisms in the food chains that they supported were turned into fossil fuels, eg crude oil, coal and natural gas, which all contain carbon.

Coal is a fossil fuel which was formed from trees which were in dense forests in low-lying wetland areas. Flooding caused the wood from these forests to be buried in a way that prevented oxidation taking place. Compression and heating over millions of years turned the wood into coal.

Crude oil and natural gas were formed from simple plants and tiny animals which were living in oceans and lakes. These small organisms died and their remains sank to the bottom where they were buried under sediments. The lack of oxygen prevented oxidation from occurring.

Over millions of years, heat and pressure turned the remains of the organisms into crude oil and natural gas. Natural gas contains the smallest molecules and is often found on top of crude oil, trapped under sedimentary rock.

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Answer:

Changes in the atmosphere

The proportion of oxygen went up because of photosynthesis by plants. The proportion of carbon dioxide went down because: it was locked up in sedimentary rocks (such as limestone) and in fossil fuels. it was absorbed by plants for photosynthesis.Cutting down of trees.Because carbon dioxide traps heat in the atmosphere, a lessening of atmospheric carbon dioxide concentrations would mean that more heat could escape into space. This would result in a net decrease in the Earth's average temperature, assuming other factors remain the same.Carbon dioxide levels decreased because of processes that included: dissolving in the oceans. use by plants for photosynthesis. formation of fossil fuels as plants died and their carbon compounds became locked up underground.Photosynthesis removes carbon dioxide naturally — and trees are especially good at storing carbon removed from the atmosphere by photosynthesis. ... These dynamics make restoring and managing existing forests, and adding trees to ecologically appropriate lands outside of farmland, especially important.

Explanation:

Answer:D

Explanation:

The claim about cats is most likely based on science is Genetic data show that modern domestic cats are related to Near Eastern wildcats. The correct option is D.

What is a claim?

A claim is a statement that is given by a person about his or her things, and they claim that the thing. It gives proof that a thing or house is a person's property.

Genetic data is the data of the genetic sequence of a person's genetic information. It is different for every person. So genetic data is very important.

So the scientific data will be the genetic data of cats that is claiming that domestic cats are related to Near Eastern wildcats. It is most likely a scientific claim.

Thus, the correct option is D. Genetic data show that modern domestic cats are related to Near Eastern wildcats.

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Answer:

Answer:K subscript e q equals StartFraction StartBracket upper C upper O subscript 2 EndBracket StartBracket upper C a upper O EndBracket over StartBracket upper C a upper C upper O subscript 3 EndBracket EndFraction

Explanation: the answer has it's root in Law of mass action which states that; the rate of a chemical reaction is directly proportional to the product of the concentrations of the reactants raised to their respective stoichiometric coefficients.

The equilibrium constant expression for the given system of reaction is [tex]K_c = \frac{ [CH_3OH]}{ [CO][H_2]^2}[/tex]

What is an equilibrium constant?

An equilibrium constant can be defined as an expression that shows the relationship between the reactants and products of a chemical reaction that is at equilibrium with respect to a specific unit.

Mathematically, the equilibrium constant is given by this formula:

[tex]K_c = \frac{ [C]^c[D]^d}{ [A]^a[B]^b}[/tex]

Where:

A, B is the product.C, D is the reactant.

How to determine equilibrium constant.

First of all, we would write the properly balanced chemical equation with the phase for this system of chemical reaction:

CO(g) + 2H₂(g) ⇆ CH₃OH(g)

Substituting the parameters into the formula, we have;

[tex]K_c = \frac{ [CH_3OH]}{ [CO][H_2]^2}[/tex]

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Answer:

joules or watts

Explanation:

Answer:

the answer is B: watts

Explanation:

edge

Answer:

The correct answer is 5.0 L

Explanation:

STP are defined as T=273 K and P= 1 atm

By using the ideal gas equation, we can calculate the number of moles (n) of the gas at a volume V=2.5 L:

PV= nRT

⇒n= (PV)/(RT) =(1 atm x 2,5 L)/(0.082 L.atm/K.mol x 273 K)= 0.112 mol

For a sample of argon gas, with the same number of moles (0.112 mol) but twice the temperature (T = 273 K x 2= 546 K):

V= (nRT)/P = (0.112 mol x 0.082 L.atm/K.mol x 546 K)/1 atm = 5.0 L

That is consistent with the fact that when a gas is heated, it expanses. So, if the temperature increases twice, the volume also increases twice.

Given the following choices, determine which best suits as a characteristic of a hurricane.

Answer Choices:

A. Hurricanes occur mostly inland

B. Hurricanes create widespread damage

C. Hurricanes can only last for a short amount of time

D. Hurricanes gain strength after passing overland

Best Answer: B. Hurricanes can create widespread damage.

Reason: A would not be correct since it is more of a variable, due to the fact that hurricanes usually begin near the coastlines, hurricanes are in fact capable of moving inland for atleast 100 miles before it dies down to a tropical storm or depression.

C is not correct since hurricanes can last up to a whole week which is approximately 168 hours.

D is not correct since it is another variable in which hurricanes can decrease in strength if it comes into contact with cool and dry air which is the opposite of warm and moist which it needs in order to occur.

Therefore, the best choice is B. Hurricanes can create widespread damage, hurricanes can unleash a staggering arsenal of mother nature's strength and the most damage a hurricane has caused can go up to 125 billion USD in damages.

One characteristic of hurricanes is that it: B. create widespread damage.

A natural disaster can be defined as a major adverse event that is caused by the forces of nature on planet Earth. Some examples of a natural disaster include the following:

EarthquakeFirestormsDuststormsFloodDroughtHurricane

Hurricane can be defined as an extremely large, powerful, violent storm that typically leads to the destruction of life and properties on both land and water.

In conclusion, a characteristic of hurricanes is that it is capable of creating widespread damage on planet Earth.

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Answer:

P = 2,8,3

q = 2,8,6

Explanation:

Because the first shell contain 2 electron and the 2nd contain 8 electron and the last shell contain the electron which is left

Explanation:

p=1s^2,2s^2,2p^6,3s^2,3p^1

q=1s^2,2s^2,2p^6,3s^2,3p^4

the quantum numbers are used in my answer.

there are 4 quantum numbers.

1.principal quantum numbers

2.angular momentum quantum numbers

3.magnetic quantum numbers

4.spin quantum numbers

In this case,the angular momentum quantum numbers is being used.it describes the unique quantum state of an electron and is designated by the letter L.this behaviour manifests itself as the shape of the orbital.electron shells have distinct shapes denoted by letters,s,p,d,f.

l can be numbers like,0,1,2,3

the maximum electrons in each letter is,

s=2

p=6

d=10

f=14

the shapes of the sub_shells

s sub_shell is spherical

p sub_shell is two dumb_bells

d sub_shell is four dumb_bells

f sub_shell is eight dumb_bells

Answer:

Physical property

Explanation:

We can visualize the property without the need to do any experiments.

Answer:

Explanation:

The states that all of the particles that make up matter are constantly in motion. As a result, all particles in matter have kinetic energy. The kinetic theory of matter helps explain the different states of matter—solid, liquid, and gas. ... Particles do not always move at the same speed.

Answer:

m = 50.74 kg

Explanation:

We have,

Initial temperature of water is 20 degrees Celsius

Final temperature of water is 46.6 degrees Celsius

Heat absorbed is 5650 J

It is required to find the mass of the sample. The heat absorbed is given by the formula ad follows :

[tex]Q=mc\Delta T[/tex]

c is specific heat of water, c = 4.186 J/g°C

So,

[tex]m=\dfrac{Q}{c\Delta T}\\\\m=\dfrac{5650}{4.186\times (46.6-20)}\\\\m=50.74\ kg[/tex]

So, the mass of the sample is 50.74 kg.

Answer:

c

Explanation:

Answer:

split the reaction in to respective ions to ge the ionic equation of this reaction

Explanation:

2 Al + 2Fe+3 O3^-2 ---> 2Al+3 O3^-2 + 2Fe

ins simple it would be

Al + Fe+3 ----> Al+3 + Fe

Answer:

fraction of oil left in the bed = 8 × 10 ⁻⁷

Explanation:

Answer: Light

Explanation:

The environment abiotic factors like sunlight, water, air, and soil are important for the growth of the plants. A wildflowers is a plant that grows in wild. It was not intentionally seeded or planted.

The light is one of the important environmental factor. As the wildflowers are blooming earlier than the large trees. Thus the wildflowers are receiving the light earlier than large trees.

Answer : The balanced chemical equation will be:

(i) [tex]2K+H_2SO_4\rightarrow K_2SO_4+H_2[/tex]

(ii) [tex]Mg(OH)_2+Zn\rightarrow Zn(OH)_2+Mg[/tex]

Explanation :

Balanced chemical equation : It is defined as the equation in which total number of individual atoms on the reactant side is equal to the total number of individual atoms on product side.

Part (i):

The balanced chemical equation will be:

[tex]2K+H_2SO_4\rightarrow K_2SO_4+H_2[/tex]

This reaction is a single displacement reaction in which most reactive element (potassium) displaces the least reactive element (hydrogen) form their solution.

Part (ii):

The balanced chemical equation will be:

[tex]Mg(OH)_2+Zn\rightarrow Zn(OH)_2+Mg[/tex]

This reaction is a single displacement reaction in which most reactive element (zinc) displaces the least reactive element (magnesium) form their solution.

Answer:

High resistance

Low conductivity

Explanation:

The more resistance (aka less conductivity) there is, the more the energy is turned into heat than simply passing through the object.

Answer:

YEESSS

Explanation:

Because that seems like the only logical answer.

Answer:

YES

Explanation:

YES

Answer:

a, there will be more beetles available for other organisms

Answer:

6000cm3

Explanation:

2CO+O2-------> 2CO2

CO:CO2

1: 1

CO= 0.5 moles

CO:O2

2:1

O2 moles= 0.5÷2

=0.25moles

1 mole------> 24000cm3

0.25moles

(0.25x24000)÷1

= 6000cm3

The answer is 6000 cm[tex]^{3}[/tex].

What Volume Of Oxygen react with carbon monoxide to produce 0.5 moles of carbon dioxide at STP?

At STP, the molar volume of any ideal gas is 22.4 L. We can identify condition “1” as the volume, temperature, and pressure of the CO2 sample at laboratory conditions and condition “2” as STP.

⇒ 2CO+O2-------> 2CO2

⇒ CO:CO2

⇒1: 1

CO= 0.5 moles

⇒ CO:O2

⇒ 2:1

⇒ O2 moles= 0.5÷2

⇒ 0.25moles

1 mole------> 24000cm3

⇒ 0.25moles

⇒ (0.25x24000)÷1

⇒ 6000cm[tex]^{3}[/tex]

6000cm[tex]^{3}[/tex] Volume Of Oxygen reacts with carbon monoxide to produce 0.5 moles of carbon dioxide at STP.

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