anybody knows the answers​

Answer:

33

Explanation:

The atomic number of an element configuration 2,8, 8,2,13​ is 33.

The electron configuration is defined as the arrangement of electrons in atomic or molecular orbitals of an atom. The sum of electrons in different orbitals shown in the electron configuration represents the atomic number of the atom.

So, atomic number of the element configuration 2,8, 8,2,13​ is 33.

Answer:

The amount in grams of CaO that will be produced is 2,302.67824 grams

Explanation:

The reaction between calcium and oxygen to produce calcium oxide (quicklime) can be presented as follows;

2Ca (s) + O₂ (g) → 2CaO (s)

From the above chemical equation, we have;

2 moles of calcium, Ca, react with 1 mole of oxygen gas, O₂, to produce 2 moles of CaO

With the assumption that there is an excess amount of Ca, we have;

The molar mass of O₂ = 32 g/mol

The number of moles, 'n', of O₂ in 657.0 grams of oxygen is therefore;

The number of moles of a substance =  Mass of substance/(Molar mass of substance)

∴ n = 657.0 g/(32 g/mol) = 20.53125 moles

The number of moles of O₂ in the 657.0 grams of oxygen present in the reaction, n = 20.53125 moles

1 mole of O₂ produces 2 moles of CaO, therefore, 20.53125 moles of oxygen will produce 2 × 20.53125 or 41.0625 moles of CaO

The molar mass of CaO = 56.0774 g/mol

Therefore, the mass of 41.0625 moles of CaO is given as follows;

Mass of substance = (The number of moles of a substance) × (Molar mass of substance)

The mass of CaO produced = 41.0625 moles × 56.0774 g/mol = 2,302.67824 g.

Answer:

C. Ionic-Li and S are two nonmetals

Answer:

sorry I don't know so sorry so sorry so sorry so sorry so sorry so

Explanation:

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Answer:

3 pounds 13 ounces

Explanation:

Math

Answer:

3.75

Explanation:

Answer:

No you can not divide a primary substance into a seperat one because ot wpuld be like divideing the universe

Given :

Number of He atoms, [tex]n = 3.4\times 10^{24}[/tex] atoms.

To Find :

How many grams are their in given number of He atoms.

Solution :

We know, molecular mass of He is 4 g. It means that their are [tex]6.022 \times 10^{23}[/tex] atoms in 4 g of He.

Let, number of gram He in [tex]3.4\times 10^{24}[/tex] atoms is x , so :

[tex]x = \dfrac{3.4\times 10^{24}}{6.022\times 10^{23}}\times 4\\\\x = $$22.58\ g[/tex]

Therefore, grams of He atoms is 22.58 g .

Answer:

That is extremely confusing. Try contacting your prof.

Explanation:

Answer:

*it can cause the atom to become and ion

Answer: [tex]_{70}^{177}\textrm{Yb}\rightarrow _{71}^{177}\textrm{Lu}+_{-1}^{0}\textrm{e}[/tex]

Explanation:

Beta-decay: In this process, a neutron gets converted into a proton and an electron releasing a beta-particle. The beta particle released is basically a electron with -1 charge and no mass.

[tex]_Z^A\textrm{X}\rightarrow _{Z+1}^A\textrm{X}+_{-1}^{0}\textrm{e}[/tex]

General representation of an element is given as:  

where,

Z represents Atomic number

A represents Mass number

X represents the symbol of an element

[tex]_{70}^{177}\textrm{Yb}\rightarrow _{71}^{177}\textrm{Lu}+_{-1}^{0}\textrm{e}[/tex]

Answer:

The IUPAC name of CH3 – CH2 – CH2 – CH=CH2 is Pent-1-ene.

Answer:

Explanation:

1 mol of any chemical is 6.02 * 10^23

x mol of any chemical is 6.31 * 10^24

You should look at this before you put it in  your calculator. You should think roughly 10.

Now you can set it up as a proportion

1/x = 6.02 * 10^23/6.31 * 10^24        Cross multiply

6.02 * 10^23 x = 1 * 6.31 * 10^24      Divide by 6.02 * 10^23

x = 6.31 * 10^24 / 6.02 * 10^23

x = 10.48 mols.

Answer:

3

Explanation:

I got this i am very smart

Answer:

The answer is 3) same mass more volume

Explanation:

Mass measures the amount of matter in a substance or an object.

Volume measures the amount of space that a substance or an object takes up.

Answer:

Mass = 96g

Explanation:

Molarity = number of moles/volume of solvent

According to the provided information, volume = 1.55L, Molarity = 1.55M

number of moles (n) = molarity × volume

n = 1.55 × 1.55

n = 2.4025

n = 2.40mol

For NaOH, molar mass = 23 + 16 + 1 = 40g/mol

mole = mass/molar mass

Mass = molar mass × mole

Mass = 40 × 2.40

Mass = 96g

Answer:0.178 moles

Explanation: carbon trihydride seems to be an unusual name for the methyl group CH3–

ionic wt 15

moles = 2.67/15 = 0.178

Mass of KCl= 19.57 g

Given

12.6 g of Oxygen

Required

mass of KCl

Solution

Reaction

2KClO3 ⇒ 2KCl + 3O2

mol O2 :

= mass : MW

= 12.6 : 32 g/mol

= 0.39375

From the equation, mol KCl :

= 2/3 x mol O2

= 2/3 x 0.39375

=0.2625

Mass KCl :

= mol x MW

= 0.2625 x 74,5513 g/mol

= 19.57 g

Answer:

Sunlight penetrates the top layers of the ocean, so photosynthesis occurs there. ... Upwelling brings nutrients to the surface.

Answer:

Explanation:

mixture of iron filings, sand, and sugar

First Step - Iron Fillings

Use a magnet to separate the iron fillings from the mixture. Due to magnetic properties of the iron fillings, the magnets would attract the iron fillings and separate it from the mixture.

Second step - Sand

Place the sand and sugar mixture in water. The sugar would dissolve in water and the sand easily separated by filtration.

Third step - Sugar and Sugar water

Boil the sugar water to remove the water and place in the refrigerator for crystallization of the sugar.

Answer:

is also

Explanation:

if iron is a mineral then a nail is a mineral to

Answer:

I hope I can help

Explanation:

I hope I can help you

Answer:

2

Explanation:

it is #2. the answer is 2

Answer:

Hope this will help you.... Take care

Answer: Potassium Chloride

Explanation:

Answer:

Its called contraction.

Explanation:

Answer:

For producing 0.55 mole of acetic acid, 0.55 mole of ethanol is required.

Explanation:

The balanced equation for this reaction is

CH3CH2OH + O2 --> CH3COOH + H2O

As we can see in this equation, the ration of number of moles of acetic acid to the number of moles of ethanal is equal to [tex]1 : 1[/tex]

Hence, in order to produce one mole of acetic acid, 1 mole of ethanol is required.

Thus, for producing 0.55 mole of acetic acid, 0.55 mole of ethanol is required.  

Answer:

Deciliter = 0.1 L

Explanation:

The options are unit of volume. In order to determine which is greatest, all the options would be converted to liter.

Microliter = 1e-6 L

Mililiter = 0.001 L

Deciliter = 0.1 L

Centiliter = 0.01 L

Among all the options; Deciliter = 0.1 L is the greatest.

Answer: It is molecular

Explanation: The reason it is molecular is because it has no ions in the formula it only has the molecular mass which is the reason why it is in fact molecular

Answer: [tex]F(g)+e^-\rightarrow F^-(g)[/tex]

Explanation:

Electron gain enthalpy is defined as energy released on addition of electron to an isolated gaseous atom.  

The amount of energy released will be maximum when the tendency to attract electrons is maximum. As flourine has atomic number of 9 and has electronic configuration of 2,7. It can readily gain 1 electron to attain stable noble gas configuration and hence liberates maximum energy.

[tex]F(g)+e^-\rightarrow F^-(g)[/tex]