calculate the number of atom in 3mode of mg​

Answer : The net ionic equation will be,

[tex]2Fe^{3+}(aq)+3Mg(s)\rightarrow 3Mg^{2+}(aq)+2Fe(s)[/tex]

Explanation :

In the net ionic equations, we are not include the spectator ions in the equations.

Spectator ions : The ions present on reactant and product side which do not participate in a reactions. The same ions present on both the sides.

The given balanced ionic equation will be,

[tex]2FeCl_3(aq)+3Mg(s)\rightarrow 3MgCl_2(aq)+2Fe(s)[/tex]

The ionic equation in separated aqueous solution will be,

[tex]2Fe^{3+}(aq)+6Cl^{-}(aq)+3Mg(s)\rightarrow 3Mg^{2+}(aq)+6Cl^{-}(aq)+2Fe(s)[/tex]

In this equation, [tex]Cl^{-}[/tex] is the spectator ion.

By removing the spectator ions from the balanced ionic equation, we get the net ionic equation.

The net ionic equation will be,

[tex]2Fe^{3+}(aq)+3Mg(s)\rightarrow 3Mg^{2+}(aq)+2Fe(s)[/tex]

A precipitate is a solid that sometimes forms when two liquids combine.

A. True

A precipitate is a solid that sometimes forms when two liquids combine.

A. True

B. False

A. True

Answer:

The answer would be ice, heat, water, and wind. (Hope this helps).

Answer:

the last four options

ice

heat

water

wind

Explanation:

edg2020

Answer:

That is sodium

Explanation:

Sodium is found there

Answer:

1. Litres

2. minutes

3. Kelvin (K)

4. Kilometer/hour

5. hours

6. Litre

7. metre

8. metre

9. Litres

10. milliliters

Explanation:

1. Coca-Cola is a liquid substance, hence, its volume must be measured in LITRES.

2. This question is related to time I.e. being early, hence, the unit of measurement is MINUTES.

3. The unit of temperature is Kelvin (K). Therefore, water boils at 373K

4. This question is related to speed, whose unit of measurement is kilometer/hour (km/hr).

5. A movie runs with time, which is measured in HOURS.

6. Mineral water is a liquid, which can only be bought per volume. Hence, the appropriate unit is LITRE.

7. Height is measured in metres (m). Therefore, one can say that " the height of your younger brother is 10metres"

8. The length of a substance is also measured in metres.

9. Volume is measured in LITRES

10. Cough syrup is a drug whose volume is quantified by millilitres i.e. a thousandth litre

Answer:

It's I, II, and III

Explanation:

Trust me.

Answer:

number 7 is GROWTH

number 8 is TARGET CELLS

number 9 is pituitary gland

Answer:

Stamen

Explanation:

Answer:

stamen

Explanation:

The stamen is the male reproductive organ. It consists of a pollen sac (anther) and a long supporting filament.

Explanation:

To convert moles to particles or grams to particles, let us have a firm understanding of what a mole is.

A mole is the unit of measuring quantity of particles.

It is the amount of substance that contains the Avogadro's number of particles.

The particle can be atoms, molecules, formula units, electrons, protons, neutrons, etc.

 So, to convert from moles to particles;

    1 mole of a substance  contains 6.02 x 10²³ particles

To convert from grams to particles;

  First convert to moles;

        number of moles  = [tex]\frac{mass}{molar mass}[/tex]  

  So,    1 mole of a substance  contains 6.02 x 10²³ particles

Answer:

#1 Atom

Oxygen

Charge neutral atom

#2 ion

Oxide ( oxygen anion)

Charge 2-

Formula O2-

#3 Atom

Flourine

Neutral atom no charge

#4 atom

Flourine

Neutral atom no charge

#5 ion

Sulphide

Charge 2-

S2-

#6 ion

Chloride Cl-

Charge -1

#7 atom

Chlorine

No Charge neutral

#8 ion

Calcium ion cation

Charge 2+

Ca++

#9 atom

Hydrogen (protium)

No charge neutral

#10 atom

Hydrogen (deutrium)

No charge neutral

#11 ion

Proton H+

Charge +1

#12 atom

Helium

No charge neutral atom

Explanation:

To find charge we need difference in proton and electron if proton are equal to electron then this is neutral atom

If electron are more this is negative charge ion

For example in oxygen 8 proton and 10 electron its charge is negative 2

If proton are more this is positive charge ion

For example in calcium 20 proton and 18 electron positive ion is formed.

According to the picture, the name of each element along with its charge and chemical symbol is as follows:

A chemical element may be defined as the characteristics of atoms that possess a given number of protons in their nuclei, along with the number of neutrons including the pure substance typically consisting only of that species.

Therefore, according to the picture, the name of each element along with its charge and chemical symbol is well mentioned above.

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Answer:

Reaction rate

Explanation:

We are told that Ben observes how quickly some dry wood is burning in a campfire.

This is an example of reaction rate because it tells us the speed i.e. how fast the dry wood is reacting with the camp fire.

Answer:

Explanation:

Silicon, phosphorus, sulphur, and chlorine oxides are acidic

Sodium oxide, which reacts with water to produce sodium hydroxide. Magnesium oxide, which reacts with hydrochloric acid to form magnesium chloride. Copper(II) oxide, which reacts with nitric acid to form copper nitrate are basic.

Answer:

Specific heat of metal of the metal is 0.8394J/g°C

Explanation:

The heat the water gain is the same losing for the metal. The equation is:

m(Metal)*ΔT(Metal)*S(Metal) = m(Water)*ΔT(Water)*S(Water)

Where m is mass: 66.0g water and 28.5g Metal

ΔT is change in temperature: (95.25°C-27.84°C) = 67.41°C for the metal and (27.84°C - 22.00°C) = 5.84°C for the water

And S is specific heat of water (4.184J/g°C) and the metal

Replacing:

28.5g*67.41°C*S(Metal) = 66.0g*5.84°C*4.184J/g°C

S(Metal) = 0.8394J/g°C

Explanation:

1 miole of Fe2O is 6.22 × 10^-23

5mole of Fe2O = 5×6.22×10^-23

=31.1×10^-23

Mass of 5 moles  of [tex]Fe_2O[/tex] is 636 g.

Formula for the calculation of mass is as follows:-

[tex]Number\ of\ mole=Mass/Molar mass[/tex].......(1)

The molar mass of [tex]Fe_2O[/tex]is [tex]2\times55.6\ g+16\ g=127.2 \g[/tex]

So ,the mass of 5 moles  of [tex]Fe_2O[/tex]is as follows:-

[tex]5\ mol=Mass/127.2\ g/mol\\5\ mol/times127.2\ g/mol=Mass\\636\ g=Mass[/tex]

Hence, the mass of 5 moles  of [tex]Fe_2O[/tex] is 636 g.

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Answer:

a. 0.528 M ..

Explanation:

Hello!

In this case, since the given by-mass percent can be written as:

[tex]\frac{10gCdSO_4}{100g\ sol}[/tex]

By using the density and molar mass of the solute, cadmium sulfate, we can compute the molarity, by also making sure we convert from mL to L of solution:  

[tex]M=\frac{10gCdSO_4}{100g\ sol}*\frac{1molCdSO_4}{208.46gCdSO_4} *\frac{1.10g\ sol}{1mL\ sol} *\frac{1000mL\ sol}{1L\ sol} \\\\M=0.528M[/tex]

Thereby, the answer is a. 0.528 M .

Best regards.

Answer:

1.1 liters

1.2 liters

1.5 liters

Explanation:

Precision in data refers to how close the experimental values of an experiment are to one another irrespective of the true or accepted value. In other words, a set of values are said to be PRECISE if they are close to one another.

In this case, data was collected after conducting an experiment about the amount, in liters, of water a specific plant needs per month. However, according to the set of experimental values provided, only 1.1 litres, 1.2litres and 1.5litres are close to one another and, hence, are said to be PRECISE even if they are not close to the accepted value of 6litres.

Answer:

1.1 liters

1.2 liters

1.5 liters

Explanation:hope you do good in edge

The freezing point of the solvent in a solution changes as the concentration of the solute in the solution changes (but it does not depend on the identity of either the solvent or the solute(s) particles (kind, size or charge) in the solution).

Generally, pressures lower than 1 atmosphere lower the temperature at which a substance freezes, but for water, a higher pressure gives a lower freezing point. The force from a pressure change figures into the molecular forces already at play in a substance.

A. History B. Thoughtless C. Strong D. Logic

Answer:

Thoughtless

Explanation:

A magnate usually refers to a wealthy and an influential business person.

But here, it is referred to as weak. So what this question requires from us is to give the antonym of philosopher.

A philosopher is one who is usually a logical person. That is he uses logic. Now the antonym for logic is thoughtless.

So if magnate is to weak, then philosopher is to thoughtless.

Answer:

1.38x10⁻⁴ M

Explanation:

First, we calculate the pOH of the solution, using the given pH:

Now we calculate the concentration of OH⁻, using the pOH:

Following the reaction Ca(OH)₂ → Ca⁺² + 2OH⁻, we divide [OH⁻] by 2 to calculate [Ca(OH)₂]:

The concentration of the calcium hydroxide in the solution is 1.38 * 10⁻⁴ M

pH is calculated using the expression:

[tex]pH = - log [H_3O^+][/tex]

Given:

pH of the solution = 10.44

[tex]pOH = 14 - pH\\\\pOH = 14 - 10.44\\\\pOH = 3.56[/tex]

[tex]pOH = -log[OH^-]\\\\[OH^-] = 2.75* 10^{-4} M[/tex]

Ca(OH)₂ → Ca⁺² + 2OH⁻

The concentration of OH⁻ is then divided by 2 according to the given reaction.

[tex][Ca(OH)_2] = \frac{2.75*10^{-4}M}{2}\\\\[Ca(OH)_2] = 1.38*10^{-4}M[/tex]

Thus, the concentration of the calcium hydroxide in the solution is 1.38 * 10⁻⁴ M.

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Answer:

No Its c

Explanation:

-_-

Answer:

a. CO2 and H20

Explanation:

Chemically, this combustion process consists of a reaction between methane and oxygen in the air. When this reaction takes place, the result is carbon dioxide (CO2), water (H2O), and a great deal of energy. The following reaction represents the combustion of methane:

CH4[g] + 2 O2[g] -> CO2[g] + 2 H2O[g] + energy

One molecule of methane, (the [g] referred to above means it is gaseous form), combined with two oxygen molecules, react to form a carbon dioxide molecule, and two water molecules usually given off as steam or water vapor during the reaction and energy.

Answer:

[tex]\Delta H_{dep}=-46.68kJ/mol[/tex]

Explanation:

Hello!

In this case, since vaporization is the processes by which a liquid goes to the gas phase, fusion by which a solid goes to liquid and deposition by which a gas goes to solid; we infer that the following set up relates the enthalpies associated to each process:

[tex]\Delta H_{fus}+\Delta H_{vap}=-\Delta H_{dep}[/tex]

Because deposition goes from a state with more energy to a state with less energy, therefore it is negative; in such a way, by plugging in we obtain:

[tex]\Delta H_{dep}=-(\Delta H_{fus}+\Delta H_{vap})\\\\\Delta H_{dep}=-(6.01kJ/mol+40.67kJ/mol)\\\\\Delta H_{dep}=-46.68kJ/mol[/tex]

Best regards!

Explanation:

they are closer and made of gas

Answer:

a) 0.018 ft^3

b) 55.55 lb/ft^3

Explanation:

given that mass m = 2 lb

volume = 62.6 in^3

= 0.036 ft^3

now, specific volume  = volume/mass  [specific volume is the reciprocal of density]

=0.036/2 = 0.018 ft^3.

b) density = mass/ volume = 2/0.036 = 55.55 lb/ft^3

Answer:

protons are red neutrons are green electrons are yellow

Explanation:

TIE FIGHTERS GO ZOOOOOM

This is displacement reaction.

Answer:

A

Explanation:

just took the test and it’s right

The action that best describes chemical weathering is water carving out a limestone cave.

CHEMICAL WEATHERING:

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Answer:

IAM at exam sorry that's why I can't answer