At room temperature, all the metalloids are solids, while most nonmetals are​

Answer:

mass of Na2O= 3.1 grams

volume of O2= 0.56 L

Explanation:

First what you need to do is establish the balanced equation for the reaction that they're giving you. In this case would be:

4Na + O2 > 2Na2O

And then, you can read the stequiometry of the reaction:

4 moles of Na react with one mole of oxygen to produce 2 moles of sodium oxide.

So now you know that you have 2.3 grams of sodium so you have to obtain the quantity of moles that are present in 2.3 grams of sodium. The molar mass the (the grams by which you will have exactly one mole) so all you have to do is divide 2.3g ÷ 23g/mol= 0.1 mol

So here you have 0.1 mol of sodium, and you know for a fact that for each 4 moles of sodium, one mole of oxygen reacts, so you simply divide the quantity of moles of sodium you have by the 4 moles of oxygen present in the balanced equation.

0.1 moles ÷ 4 moles = 0.025.

So for each 0.1 moles of sodium that react, 0.025 moles of Oxygen react.

Now what you need to do is to find the limitant reactor (the reactor that's according to the comparison to the balanced equation is in a smaller ratio to the other element, that would be in excess.

In this case, both elements are in a ratio that respects the balanced equation so neither of them is in excess or is limitant.

Now, to determine the amount of Na2O, you simply know that one mole of oxygen react to produce to moles of sodium oxide, So all you have to do is establish the factor of conversion:

0.025 moles O2 x 2 moles Na2O/ 1 mol O2= 0.05 moles of Na2O

Then you convert that to grams by multiplying 0.05 by the molar mass of Sodium oxide and it will be:

0.05 mol Na2O x 62 g/mol= 3.1 grams of Na2O

Now what you need to do is find the volume by which O2 is reacting in the reaction so you can use the equation of the ideal gas law.

PV=nRT at standard temperature and pressure (273 K and 1 Atm)

P=Pressure

V=Volume

n=Number of atoms

R=constant of gases (0.082 Atm L/ mol K)

T=Temperature

V=nRT/P (because you need to find the volume)

V= (0.025 mol)(0.082)(273 K)/1 atm

V=0.56 L

And there you go :)

Answer:

We have the atoms, and we have the molar mass of Vanadium (listed in the periodic table) which should be 50.94g/mol.

The first step is to convert the 4.18 x 10^23 atoms into moles by dividing the atoms by Avogadro's number (6.02 x 10^23)  

(4.18 x 10^23)/(6.02 x 10^23) = 0.694 moles

Now we know that moles is equal to the mass divided by the molar mass. So now that we have the moles and the molar mass of Vanadium, we can rearrange the equation to find mass. Once you have rearranged it, you have to multiply the moles by the molar mass.

So 0.694 moles x 50.94g/mol = 35.35g of V

Using the Rydberg formula, the spectral line of H - atom is suitable for this purpose is Paschen, ∞ → 3.

1/λ = RH(1/nf^2 - 1/ni^2)

Given that;

λ = wavelength

RH = Rydberg constant

nf = final state

ni = initial state

Then;

1/λ =  1 × 10^7 m-1 (1/3^2 - 1/ ∞^2)

1/λ =  1 × 10^7 m-1 (1/3^2 )

λ = 900 nm

Hence, the correct answer is Paschen, ∞ → 3

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Answer:

Nomenclature is the process of naming chemical compounds with different names so that they can be easily identified as separate chemicals. ... For example, organic compounds include molecules with carbon rings and/or chains with hydrogen atoms (see picture below).01-Jul-2014

Nomenclature: Iron (II) Chloride

Compound: FeCl2

Answer:

Nomenclature is the process of naming chemical compounds with different names so that they can be easily identified as separate chemicals. Inorganic compounds are compounds that do not deal with the formation of carbohydrates, or simply all other compounds that do not fit into the description of an organic compound.

Explanation:

Answer:

d. Methanol is more acidic than the alkyne and will be deprotonated instead.

Explanation:

because acidity is the ability to lose H+, leaving an anion behind; acidity depends on the stability of the anion.

The amount of oxygen involved in the reaction would be 20.7 g

The equation of rusting of iron is as follows:

[tex]4Fe + 3O_2 ---> 2Fe_2O_3[/tex]

The mole ratio of Fe to O2 is 4:3.

Mole of 48.3 g Fe = mass/molar mass

                               = 48.3/56

                                = 0.8625 moles

Equivalent mole of O2 = 0.8625 x 3/4

                                       = 0.6469 moles

Mass of 0.6469 moles O2 = mole x molar mass

                                             = 0.6469 x 32

                                              = 20.7 g

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Explanation:

it shows covalent bonds

The type of bond the diagram shows is covalent bond. As shown the sharing of electrons in the diagram.

Bonds are defined as any of the interactions that lead to atoms joining together to form molecules, ions, crystals, and other stable species that make up the familiar materials found in everyday life. The ability to build molecules is made possible by a chemical bond, which is a strong attraction between atoms, ions, or molecules. Chemical bonds that hold molecules together also form temporary connections vital for life.

Covalent bond are defined as a type of chemical link where atoms share electrons to create electron pairs. Low melting and boiling temperatures, low vaporization heat, low water solubility, and poor conductivity are four characteristics of covalent compounds.

Thus, the type of bond the diagram shows is covalent bond. As shown the sharing of electrons in the diagram.

To learn more about bonds, refer to the link below:

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#SPJ2

Answer:

Explanation:  encourage your legislators to support land acquisition programs such as Florida Forever and the Rural and Family Lands Protection Program.

Answer:

Polythene has the lowest melting/boiling point from all the other covalent structures mentioned in this question.

Answer:

Polythene (polyethene according the IUPAC nomenclature.)

Explanation:

Consider the structure of each option:

Melting each structure requires overcoming the forces that hold the structure rigid:

Van der Waal forces are much easier to break than covalent bonds.

Hence, the melting point of polythene would be the lowest among the options.

Explanation:

Because the place on the map can be changed to another shape by natural effects like faulting,folding , volcanism

Answer:

Maps must change over time as the geographical structures change from time o time. The roads and highways also change often due to the development activities .

Answer:

SORRY IM LATE! at least i saw it.

Explanation:

Kingdom is Eucaryota

domain is eucarya

Atom information–

Substituting values –

[tex]\qquad[/tex] [tex]\twoheadrightarrow\bf A=p^{+}+n^{0}[/tex]

[tex]\qquad[/tex] [tex]\twoheadrightarrow\bf A=26+29[/tex]

[tex]\qquad[/tex] [tex]\twoheadrightarrow\bf A=55[/tex]

____________________________________________

Answer:

A chemical equation is the symbolic representation of a chemical reaction in the form of symbols and formula. (i) It must refer to an actual chemical reaction. (ii) It should be molecular. For example, H, O, N should be written as H2, O2, N2. (iii) It should be balanced and conform to the law of conservation of matter.A chemical equation conveys both qualitative and quantitative information. Qualitatively, a chemical equation tells the names of the various reactants and the products.

Answer:  

e=hf conversion

hope it helps! stay safe as always!

Answer:

mercury and bromine are the only two elements

Answer:

Ranked from lowest to highest:

Sulfur - 999.6 kJ/mol

Hydrogen - 13.5984 kJ/mol

Oxygen - 13.6181 kJ/mol

Fluorine - 17.4228 kJ/mol

Answer:

Quadrilateral because there is no parallel and equal

Answer:

Composting, recycling, technological development, water cycle and photosynthesis are changes that have good effects. Some changes have bad effect like pollution and destruction of habitat and lose of lives.

Explanation:

hope it helps

Answer:

If garlic repels fleas, then a dog that is given garlic every day will not get fleas. Bacterial growth may be affected by moisture levels in the air. If sugar causes cavities, then people who eat a lot of candy may be more prone to cavities.

Explanation:

Answer:

distance traveled per unit of time.

The answer is going to be a nuclear reactor

Answer:

10 kg of water was added to the 20 kg of seawater to dilute it from 3% to 2%. Hope this helps!!!!!!

The mole ratio can be seen below and the volume of each precipitate is 60 mL.

A mole ratio refers to a conversion factor that compares the quantities of two chemicals in moles in a chemical laboratory experiment.

Mole ratio For 1:

Mole ratio For 2:

Mole ratio For 3:

Mole ratio For 4:

Mole ratio For 5:

Mole ratio For 6:

Mole ratio For 7:

Since the parameters from the left side of the diagram are not shown, we will assume that the volumes for each precipitate are the addition of both volumes in each column.

By doing so, we have:

1.

2.

3.

4.

5.

6.

7.

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The molecular formula of the ethylene glycol is C₂H₆O₂.

From the question given above, the following data were obtained:

Molecular formula = empirical × n = molar mass

[CH₃O]n = 62

[12 + (3×1) + 16]n = 62

31n = 62

Divide both side by 31

n = 62 / 31

n = 2

Molecular formula = [CH₃O]n

Molecular formula = [CH₃O]₂

Molecular formula = C₂H₆O₂

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Answer:

15 L

Explanation:

The important thing to remember about reactions that involve gases kept under the same conditions for pressure and temperature is that the mole ratios that exist between the gases are equivalent to volume ratios.

This can be proven using the ideal gas law equation for two gases kept at a temperature

T

and a pressure

P

.

P

⋅

V

1

=

n

1

⋅

R

⋅

T

→

the ideal gas law equation for the first gas

P

⋅

V

2

=

n

2

⋅

R

⋅

T

→

the ideal gas law equation for the second gas

Divided these two equations to get

P

⋅

V

1

P

⋅

V

2

=

n

1

⋅

R

⋅

T

n

2

⋅

R

⋅

T

This means that you have

n

1

n

2

=

V

1

V

2

→

the mole ratio is equivalent to the volume ratio

In your case, the balanced chemical equation looks like this

N

2(g]

+

3

H

2(g]

→

2

NH

3(g]

The problem tells you that this reaction takes place at constant temperature and pressure. You don't need to know the exact values, you just need to know that they are constant for all three chemical species.

You can thus say that since you have a

1

:

3

mole ratio between nitrogen gas and oxygen gas, you will also have a

1

:

3

the volume ratio between these two gases

n

N

2

n

H

2

=

V

N

2

V

H

2

=

1

3

The volume of hydrogen gas needed to react with that much nitrogen gas will thus be

5.0

L N

2

⋅

3

L H

2

1

L N

2

=

15 L H

2

Answer:   maybe D sorry if it's wrong

Explanation: