Type the correct coefficients for the following reaction: Al+S2 - > Al2S3

Answer:

Position D

Explanation:

One fourth of the Moon will be visible from Earth when the Moon is in position D. The reason why this is the right position is that the Moon will be in a position where the majority of its surface that is lighted by the Sun is facing the Sun. On the other hand, the angle is just right that about one quarter of the lighted part of the Moon is also facing the Earth. This will result in a perception from the Earth's view point that the Moon is lighted at one quarter of its surface.

Answer:

No, only the wiehgt, because the gravitational pull on the two, are diffrent. 3kg on the moon may be 6kg here on earth. but in the end, the rock still holds however much rock it held in the begining.

Explanation:

Final answer:

The mass of a moon rock remains unchanged when moved from the moon to Earth. However, its weight would increase due to the stronger gravitational pull of the Earth.

Explanation:

When a 3 kg moon rock is moved from the moon to the earth, the mass of the rock does not change. Mass is a measure of the amount of matter in an object and is constant regardless of location. However, the weight of the rock, which depends on the gravitational pull it experiences, will change. On the Moon, where the acceleration due to gravity is only 1.67 m/s², the rock would weigh less than it does on Earth, where the acceleration due to gravity is 9.80 m/s². Thus, while the mass remains unchanged, the weight of the moon rock increases when it is moved to Earth because it is in a region with stronger gravity.

Answer:

The temperature.

Explanation:

Temperature and kinetic energy are equally proportional.

D. Temperature is the factor based upon which the average kinetic energy of the substance depends upon.

The kinetic theory of gases depicts a gas as countless submicroscopic particles, which are all in steady, fast, arbitrary movement. The haphazardness emerges from the particles' numerous crashes with one another and with the dividers of the holder.  

This theory of gases clarifies the perceptible properties of gases, for example, weight, temperature, thickness, warm conductivity, and volume, by thinking about their atomic synthesis and movement. The hypothesis places that gas weight results from particles' crashes with the dividers of a compartment at various speeds.  

Answer: It is called an ion.

Explanation: When an atom has an unequal amount of protons and electrons, it can form an attraction with another.

More electrons- Negative ion (ANION)

More protons- Positive ion

Equal amount- Neutral

Good luck, hope this helps!

Heat of vapourrisation required to( change the state) of water is 2260 J/grm.

Answer : The heat of vaporization is, 924.7 joules/gram.

Explanation :

Formula used for heat of vaporization :

[tex]H_{Vap}=\frac{q}{m}[/tex]

where,

[tex]H_{Vap}[/tex] = heat of vaporization = ?

q = required heat = 8720 J

m = mass of substance = 9.43 g

Now put all the given values in the above formula, we get :

[tex]H_{Vap}=\frac{8720J}{9.43g}=924.7J/g[/tex]

Therefore, the heat of vaporization is, 924.7 joules/gram.

Carbon–oxygen bond. A carbon–oxygen bond is a polar covalent bond between carbon and oxygen. Oxygen has 6 valence electrons and prefers to either share two electrons in bonding with carbon, leaving the 4 nonbonding electrons in 2 lone pairs :O: or to share two pairs of electrons to form the carbonyl functional group.

The type of bond that forms between carbon and oxygen is a covalent bond.

Covalent bonding involves the sharing of electrons between atoms. In the case of carbon and oxygen, both atoms can achieve a more stable electron configuration by sharing electrons.

Carbon has four valence electrons, and oxygen has six valence electrons. When carbon and oxygen atoms come together, they can share two electrons to form a double bond.

In this arrangement, carbon shares two electrons with oxygen, and oxygen shares two electrons with carbon. This sharing of electrons allows both atoms to achieve a full outer electron shell, satisfying the octet rule.

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Answer:continental drift

Explanation:

Answer:

Option (B)

Explanation:

The continental drift is defined as the shifting of the continents over the large water body with respect to the poles. These continents moved from one place to another across the line of different latitudes and longitudes, experiencing various types of climatic conditions, due to which the ocean water currents has been significantly affected. This presence and continuous motion of continents affects the direction of the ocean currents that moves from the equatorial to the polar region.

Thus, over the earth's geological history, the ocean currents are undergoing changes due to the continental drifting.

Hence, the correct answer is option (B).

Answer:

Plasma.

Explanation:

The three common forms of matter are liquids, solids, and gases.

Answer:

The material that would most likely slow the flow of electricity is plastic.

Explanation:

Plastic is a conductor. A conductor is something that stop or slows down the flow of electricity.

The velocity of the argon atoms has been 414.6155 m/s.

The average velocity of the atom has been the speed possessed by the atom at the certain temperature.

The average velocity of the gas has been given by:

[tex]v=\sqrt{\dfrac{3nRT}{m} }[/tex]

The moles of argon have been, [tex]n=1[/tex]

The Boltzmann constant has been, [tex]R=8.31\;\rm J/mol.K[/tex]

The temperature of gas has been, [tex]T=275\;\rm K[/tex]

The mass of the gas has bee, [tex]m=0.0399\;\rm kg[/tex]

Substitute the values for the velocity, v, of argon atoms as:

[tex]v=\sqrt{\dfrac{3\;\times\;1\;\;\times\;8.13\;\times\; 275}{0.0399} }\\v= \sqrt{171,906.015}\\v= 414.6155\;\rm m/s[/tex]

The velocity of the argon atoms has been 414.6155 m/s.

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The average velocity of argon atoms in a specific condition using a given formula.Therefore 488 m/s is correct.

The average velocity of atoms in 1.00 mol of argon at 275 K can be calculated using the formula:

v_avg = √(8 * k * T / (π * m))

Plugging in the values, we find the average velocity to be approximately 488 m/s.

Hello!

Reaction rate, the speed at which a chemical reaction proceeds.

Oh yes another person answered the same thing before me. Sorry if I was inconvenient.

Hope you pass or understand everything, though! Good luck!

~ Destiny ^_^

Final answer:

The rate of a chemical reaction refers to how fast the reaction proceeds. It is determined by the change in concentration of a reactant or product with time.

Explanation:

The rate of a chemical reaction refers to how fast the reaction proceeds. It can be expressed as the change in concentration of a reactant or product with time. For example, if a 1.00 M aqueous solution of substance A is converted to substance B, the reaction rate can be measured by tracking the decrease in the concentration of A or the increase in the concentration of B over a specific time interval.

Answer:

a infectious and a noninfectious disease

Explanation:

Answer:

what gigi said but other way around

Explanation:

Answer:

0.98 g of H₂

Explanation:

the balanced equation for the reaction is

Mg + 2HCl ---> MgCl₂ + H₂

molar ratio of Mg to H₂ is 1:1

number of Mg moles reacted = 12 g/ 24.3 g/mol = 0.49 mol

according to molar ratio

when 1 mol of Mg reacts 1 mol of H₂ is formed

therefore when 0.49 mol of Mg reacts - 0.49 mol of H₂ forms

therefore mass of H₂ formed = 0.49 mol x 2 g/mol = 0.98 g

mass of H₂ formed is 0.98 g

Approximately 0.988 grams of H2 will be produced from 12 grams of Mg according to the equation provided. This is calculated by first converting the mass of Mg to moles, then using the stoichiometric relationship to find the moles of H2, and finally converting moles of H2 back to grams.

To solve this problem, you need to know that in the balanced chemical equation, the coefficients of the reactants and the products represent the mole ratios in which they react and form. In the provided equation, 'Mg + 2HCl → MgCl2 + H2', there is a 1:1 ratio between Mg and H2. So, we first convert grams of Mg into moles using its molar mass. The molar mass of Mg is approximately 24.305 grams per mole. Therefore, the amount of moles of Mg we have is 12g (amount given) divided by 24.305g/mol (molar mass of Mg) which is approximately 0.494 moles of Mg.

Since Mg and H2 are in a 1:1 ratio, we also have approximately 0.494 moles of H2. To convert the moles of H2 to grams, we multiply by its molar mass (about 2 grams per mole). So, the mass of H2 produced is 0.494 moles times 2g/mol which equals approximately 0.988 grams of H2.

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Answer:

The amount of energy lessens

Explanation:

The producer will always have the most energy as it comes directly from the sun and the energy is passed onto each organism as they eat one another. The higher you are the least amount of energy you have! Hope that helps!

Answer:

C.

Explanation:

The electronic configuration of N (7 electrons): 1s² 2s² 2p³.

The orbital 1s is filled with two electrons and their spinning direction is opposite and also electrons of 2s.

3p contains (3 electrons) should fill the 3 orbitals firstly. Every orbital contains 1 electron and be in the same spin direction.

So, the right choice is c.

A is wrong because 2 electrons of 3p are paired in the first orbital before filling every orbital.

B is wrong because the 2 electrons of 1s and 2s are in the same direction and also 2 electrons of 3p are paired in the first orbital before filling every orbital.

D is also wrong the 2 electrons of 1s and 2s are in the same direction and the electron in the second orbital of 3p are in opposite direction of the other 2 electrons.

During cellular respiration, plants break down the stored food in the mitochondria.  Vascular plants have special tissues called xylem and phloem that transport water and minerals to leaves, and food from the leaves to all areas of the plant.

Hope this helps :D

Final answer:

Phloem tissue transports food produced in photosynthesis to other parts of the plant for growth and storage.

Explanation:

Phloem tissue is responsible for the translocation of soluble organic substances, such as sugar, throughout the plant. The substances travel along sieve elements, which are living cells separated by end walls with small pores called sieve plates. Phloem transports food produced in photosynthesis to other parts of the plant for growth and storage, including the roots which in turn ensures healthy growth of plants and their various parts.

Therefore, Phloem tissue transports food produced in photosynthesis to other parts of the plant for growth and storage.

Answer:

volume is 32.00 mL

Explanation:

the balanced equation for the neutralisation reaction is as follows

2NaOH + H₂SO₄ ---> Na₂SO₄ + 2H₂O

molar ratio of NaOH to H₂SO₄ is 2:1

number of H₂SO₄ moles reacted - 0.4000 mol/L x 10.00 x 10⁻³ L = 0.00400 mol

according to the molar ratio

number of NaOH moles reacted - 2 x number of H₂SO₄ moles reacted

number of NaOH moles reacted - 2 x 0.004000 mol = 0.008000 mol

concentration of NaOH is - 0.2500 mol/L

concentration = number of moles of solute / volume

rearrange the equation

volume = number of moles / concentration

volume = 0.008000 mol / 0.2500 mol/L

volume = 0.03200 L

therefore volume is 32.00 mL

To neutralize 10.00 mL of 0.4000 M H2SO4, you will need 32.00 mL of 0.2500 M NaOH.

To determine the volume of 0.2500 M NaOH required to neutralize 10.00 mL of 0.4000 M H2SO4, we can use the concept of stoichiometry and the balanced chemical equation for the neutralization reaction:

H2SO4 + 2NaOH → Na2SO4 + 2H2O

From the equation, we can see that 1 mole of H2SO4 reacts with 2 moles of NaOH.

First, we calculate the moles of H2SO4 in the given solution: 0.4000 M * 0.01000 L = 0.004000 mol.

Since the mole ratio of H2SO4 to NaOH is 1:2, we need twice the moles of NaOH to neutralize the H2SO4. Thus, the required moles of NaOH is 2 * 0.004000 mol = 0.008000 mol.

Next, we can use the molarity and the moles of NaOH to calculate the volume of NaOH:

The volume of NaOH = Moles of NaOH / Molarity of NaOH = 0.008000 mol / 0.2500 M = 0.03200 L = 32.00 mL.

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Answer:

Columns

Explanation:

Diagonals are a of no importance in the Periodic Table

cells are non applicable,

rows organize the number of orbitals in an atom

Answer: The correct answer is Option d.

Explanation:

Elements in a periodic table are distributed in 7 Periods and 18 Groups. The elements are distributed on the basis of increasing atomic numbers.

Periods are known as horizontal rows and groups are known as vertical columns.

In a period, the number of shells around the nucleus remains the same but the valence electrons keep on increasing as we move from left to right.

For Example: In Period 2, the number of valence shells increases from 1 (for lithium) to 8 (for neon)

In a group, the number of shells around the nucleus keeps on increasing but the valence electrons remains the same as we move from top to bottom.

For Example: For Group 1, the number of valence electrons are 1

Hence, the correct answer is Option d.

Answer:

107.8682 u

Explanation:

Well Silver has an atomic mass of aproximately 107.9. 1 mole of silver atoms = 107.9g and there are 6.02x10^23 atoms in one mole. Therefore to find mass of one atom you should divide the mass by Avodgadro's constant to find the mass of one atom because they all have an even distribution of mass.

The average atomic mass of the element takes the variations of the number of neutrons into account, and tells you the average mass per atom in a typical sample of that element. For example, the element silver (Ag) has two naturally occurring isotopes: Ag-107 and Ag-109 (or 107Ag and 109Ag).

Answer: to determine the atomic mass of silver, or any other element , add the number of protons and the number of neutrons together.

Explanation:

23.0g of Zn is equivalent to 0.35 moles. Given that CuCl2 is in excess, the reaction will result in an equal number of moles of ZnCl2, i.e., 0.35 moles.

This is a question about the stoichiometry of the reaction between zinc (Zn) and copper chloride (CuCl2). We are given 23.0g of Zn and asked how many moles of zinc chloride (ZnCl2) will be produced, assuming that copper chloride is present in excess.

The relevant reaction from the examples given is:
Zn(s) + 2HCl(aq) → ZnCl2(aq) + H2(g)

First, we need to calculate the moles of Zn. We do this using the molar mass of Zn, which is approximately 65.38 g/mol.

moles of Zn = 23.0 g / 65.38 g/mol = 0.35 mol

Because CuCl2 is in excess and the reaction stoichiometry is 1:1, we can assume all the zinc will react to form ZnCl2. Therefore, 0.35 moles of Zn will produce 0.35 moles of ZnCl2.

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0.351 moles of ZnCl2 will be produced from 23.0g of Zn with CuCl2 available in excess.

In order to determine the number of moles of ZnCl2 produced, we need to use the stoichiometry of the reaction. Based on the balanced equation: CuCl2 (aq) + Zn (s) → ZnCl2 (aq) + Cu (s)

We can see that the mole ratio between ZnCl2 and Zn is 1:1. Therefore, the number of moles of ZnCl2 produced will be the same as the number of moles of Zn used.

Since we have 23.0g of Zn, we can convert this mass into moles using the molar mass of Zn:

23.0g Zn x (1 mol Zn / 65.38g Zn) = 0.351 mol Zn

Therefore, 0.351 moles of ZnCl2 will be produced from 23.0g of Zn with CuCl2 available in excess.

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Answer:

1. Evaporation

2. Condensation

3. Precipitation

4. Runoff

Explanation:

The water cycle shows how water moves on the earth as it passes through different phases.

Water on land is stored in oceans, rivers and other water bodies. This water coupled with those in plants and animals are turned into vapor through EVAPORATION. Evaporation facilitates the movement of water on the surface into the atmosphere.

In the atmosphere, the vapor condenses on dust particles found up there. The vapors forms a nuclei around the dust particles and water condenses at the saturated vapor pressure. This forms cloud.

As the water collects more and more, gravity forces the water to fall in form of PRECIPITATION. The precipitation can be in form of snow or rainfall.

When precipitation occurs, they move on the surface as SURFACE RUNOFFS. Some of the runoff goes back into oceans and rivers. Others infiltrates into the ground and collects in the ground water pool under the subsurface. Subsurface water can also get into into other water bodies when the water table coincides with the steam level.

The water in these bodies can then go into the cycle again. The sun is the source of energy for this process.

The water cycle consists of four main steps including evaporation/sublimation, condensation/precipitation, subsurface water flow, and surface runoff/snowmelt, representing a continuous movement of water on, above, and below the surface of the Earth.

According to the water cycle diagram: 1 corresponds to evaporation/sublimation, where water from the oceans turns into water vapor, due to the sun's energy. 2 represents condensation or precipitation, which takes place when the water vapor cools down and forms clouds, eventually falling as rain or snow. 3 stands for subsurface water flow - the movement of water underground, within the soil, which occurs after the water infiltrates the soil. Lastly, 4 is related to surface runoff/snowmelt - when excess water from rain, meltwater, or other sources flows on the Earth's surface and returns to the oceans completing the cycle.

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Answer:

Polar covalent bonds within the molecule that are not symmetric

Explanation:

(APEX)

Hope you got this in time

Answer:

polar covalents bonds within the molecule that are not symmetrical

Explanation:

Answer:

V2= 0.0796m3

Explanation:

We have that for a real gas the following relation is fulfilled:

PV / T = constant

To use this formula I need to pass the pressure of mmHg to KPa and the volume of L to m3, knowing that

 1Kpa = 7.50062mmHg

1L = 0.001m3

So i can say

P1V1/T1 =P2V2/T2

So

V2= P1V1T2/P2T1

V2= 51.60KPa*0.034m3*350k/36.53KPa*211k

finally

V2= 0.0796m3

Answer:

3.88%

Explanation:

Given parameters:

Grams of solute = 3.55g of NaCl

Grams of solution = 91.55g of solution

Mass percentage

of NaCl(%) = grams of solute/grams of solution x 100

Mass percent = 3.55/91.55 x 100

Mass percent = 3.88%

Answer:  B.  Tornado

Explanation:  A tornado is a violent rotating column of air extending from a thunderstorm to the ground. The most violent tornadoes are capable of tremendous destruction with wind speeds of up to 300 mph. They can destroy large buildings, uproot trees and hurl vehicles hundreds of yards. They can also drive straw into trees.

Severe weather that doesn't serve as intense tropical storm is B:

tornado.

Therefore, option B is correct.

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Answer:

pulm pudding: Model of the atom proposed by J.J Thomson as a result of his work with cathode ray tubes. In it, the neutral atom contains negatively charged particles (electrons) scattered throughout a lump of positive charge like raisins in plum pudding.

The 'plum pudding' model describes an atom as a large positively charged pudding with negative electrons dotted around it. The Bohr model illustrates the atom with a central nucleus and electrons in fixed orbits. The wave mechanical model uses quantum mechanics to depict an electron cloud around the nucleus.

The plum pudding model of the atom was proposed by J.J. Thomson in 1897. This model suggests that the atom is a 'pudding' of positive charge with 'plums' of negative charge ( electrons) scattered throughout.

Next, the Bohr's model asserted by Niels Bohr in 1913, depicts the atom as a small, positively charged nucleus surrounded by electrons that travel in circular orbits around the nucleus. Each orbit corresponds to a specific energy level.

Lastly, the wave mechanical model, also known as the quantum mechanical model, was developed throughout the 1920s. This model implies that it is impossible to determine precisely both the position and momentum of an electron at the same time. Therefore, electron location is represented as an electron cloud around the nucleus, where the density of the cloud indicates the probability of finding the electron in that location.

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Answer:

Its Temperature.

Explanation:

Answer: Solid and liquid

Explanation:

An aerosol is a suspension of fine solid particles or liquid droplets, in air or another gas.[1] Aerosols can be natural or anthropogenic. Examples of natural aerosols are fog, dust, forest exudates and geyser steam. Examples of anthropogenic aerosols are haze, particulate air pollutants and smoke.[dubious – discuss][1] The liquid or solid particles have diameters typically <1 μm; larger particles with a significant settling speed make the mixture a suspension, but the distinction is not clear-cut. In general conversation, aerosol usually refers to an aerosol spray that delivers a consumer product from a can or similar container. Other technological applications of aerosols include dispersal of pesticides, medical treatment of respiratory illnesses, and convincing technology.[2] Diseases can also spread by means of small droplets in the breath, also called aerosols (or sometimes bioaerosols).[3]

Aerosol science covers generation and removal of aerosols, technological application of aerosols, effects of aerosols on the environment and people, and other topics.

Aerosols, the atmospheric particles, consist of: D. Solid and liquid

Suspension is a heterogeneous mixture where the solute particles get suspended throughout the bulk of the solvent, then left floating around freely in the medium.

An aerosol is a suspension of fine solid particles or liquid droplets and it is in air or another gas. An aerosol is a gas containing very small particles of a solid or liquid with particle diameters in the range of [tex]10^-9[/tex] to [tex]10^-4[/tex]m.

Aerosols are come from volcanoes, dust storms, fires, vegetation, sea spray, burning of fossil fuels and land use. Primary aerosols are those particles emitted directly into the atmosphere. It is because the different sources of aerosols mix on the earth's surface. Warming aerosols are include black carbon and dark soot. Cooling aerosols include dust, sulfate particles and sea spray.

Aerosols can influence the Earth's climate in two ways. When the sky is clear (devoid of clouds), aerosols can reflect incoming sunlight back to outer space

Therefore aerosols, the atmospheric particles, consist of: Solid and liquid.

Grade:  9

Subject:  chemistry

Chapter:  aerosols

Keywords:   Aerosols, Solid, liquid, Water, the atmospheric particles

Answer:

up quark

Explanation:

Answer:

up quark

Explanation:

If we balance the reaction.Then it seems like

6HBr + 2Al > 2AlBr3 +3H2

where, Al and AlBr3 has their coefficient of 2.

Answer:

[tex]\boxed{\text{Al and AlBr$_{3}$}}[/tex]

Explanation:

Step 1. Pick the most complicated-looking formula (AlBr₃).

Put a 1 in front of it.

HBr + Al ⟶ 1AlBr₃ + H₂

Step 2: Balance Al.

We have fixed 1 Al on the right. We need 1 Al on the left.

Put a 1 in front of Al.

HBr + 1Al ⟶ 1AlBr₃ + H₂

Step 3. Balance Br.

We have fixed 3Br on the right. We need 3Br on the left.

Put a 3 in front of HBr.

3HBr + 1Al ⟶ 1AlBr₃ + H₂

Step 4. Balance H.

We have fixed 3 H on the left. We need 3 H on the right.

We need one more H (½ H₂) on the right.

3HBr + 1Al ⟶ 1AlBr₃ + ³/₂H₂

Oops. Fractional coefficients! We must multiply all coefficients by a number to give integer coefficients.

Step 5. Get rid of fractions.

Multiply all coefficients by2.

6HBr + 2Al ⟶ 2AlBr₃ + 3H₂

All species have a coefficient. The equation is now balanced.

[tex]\text{The two substances with a coefficient of 2 are }\boxed{\textbf{Al and AlBr$_{3}$}}[/tex]