Calculate the number of moles of MgO if the mass of MgO (magnesium oxide) is 50 g?

Please help... I will mark the answer with brainlist...
 
​

Answer

1Ca3N2 + 6NaCl ---> 3CaCl2 + 2Na3N

Explanation

Given the following equation:

___ Ca3N2 + ___NaCl -->CaCl2+__ + Na3N

Step 1: on the left there are 3 Ca, but on the right, there is one Ca, add 3 infront of CaCl2

Ca3N2 + NaCl ---> 3CaCl2 + Na3N

Step 2: on the right, there are 6 Cl, on the left there is only 1, therefore add 6 infront of NaCl

Ca3N2 + 6NaCl ---> 3CaCl2 + Na3N

Step 3: Now balance N, there are 2 N on the left and one on the right.

Ca3N2 + 6NaCl ---> 3CaCl2 + 2Na3N

The atoms (or groups of atoms) that can have expanded octets are option c. N and option e. O.

An octet is a set of 8 electrons in an atom's outer shell. The octet rule is a chemical rule that explains how atoms combine and behave chemically by requiring them to have complete outer electron shells consisting of eight electrons. When considering covalent bonding in a compound, the octet rule states that atoms will donate, accept, or share electrons to achieve a full valence shell of eight electrons.

Expanded octets occur when an atom in a compound has more than eight electrons in its outer shell. Expanded octets are only observed for elements in period three and above because of the d orbitals in the valence shell, which allows for more electrons to be held.

Expanded octets can exist due to the existence of d-orbitals in elements. The most popular expanded octets are found in phosphorus, sulfur, and chlorine.

To learn more about atoms visit;

https://brainly.com/question/1566330

#SPJ11

The bond order for a second-period diatomic particle containing five electrons in antibonding molecular orbitals and eight electrons in bonding molecular orbitals is 1.5

Bond order is defined as the number of electrons in bonding molecular orbitals minus the number of electrons in antibonding molecular orbitals divided by two. As a result, we may determine the bond order of this diatomic particle by the formula: Bond order = (number of bonding electrons - number of antibonding electrons) / 2

Bond order = (8 - 5) / 2

Bond order = 1.5.

This diatomic molecule, according to the bond order, is a stable molecule since the bond order is greater than 1, indicating that it is a double bond. The molecule has an overall bond strength that is greater than a single bond, but not as strong as a triple bond. So therefore he bond order for a second-period diatomic particle containing five electrons in antibonding molecular orbitals and eight electrons in bonding molecular orbitals is 1.5

Learn more about bond order at:

https://brainly.com/question/30641030

#SPJ11

Answer:

I think it was a huge fish. umm not sure

Explanation:

Answer:

Two ions that produced similar colors in the flame test were Ca+2 and Sr+2. 3.

Explanation:

The colors are produced when an electron jumps to a higher level and then jump back down.

Ba2+ and Cu2+ and Sr2+ and Li+ were the pair with the similar color. Sr and Li displayed red colors, while Ba and Cu had mild greenish yellowish hues.

Why do some ions in the flame test generate colors that are similar?

The precise sizes of the potential energy jumps differ from metal to metal. As a result, the flame color of each metal will differ due to its unique spectral line pattern. The movement of the electrons in the metal ions contained in the compounds results in the hues of the flame.

The energy released by each electron when it returns to its initial condition determines the hue of the light that is produced.

To learn more about ions in the flame refer to:

https://brainly.com/question/28715571

#SPJ2

In co3-2, all three c-o bonds have identical bond lengths of 136 pm. The identical bond lengths are due to the trigonal planar shape of CO32-.

The CO3^-2 ion is trigonal planar, with three equally spaced oxygen atoms and a carbon atom in the middle. All of the bonds are identical since they are the same, so the bond lengths are the same. A carbonate ion is a polyatomic ion with the chemical formula CO32−. The ion consists of a carbon atom that forms a covalent bond with two oxygen atoms and a charge of 2−.Carbonate ion is sp2 hybridized, and it has a total of 24 valence electrons. Carbon forms two pi bonds with two of the oxygen atoms, resulting in a planar triangular geometry.

The remaining oxygen atom bonds with the carbon atom through a sigma bond, resulting in a trigonal planar molecule. The bond angles in a carbonate ion are 120 degrees, and the bond lengths are identical. The bond length is the distance between the nuclei of two atoms that are covalently linked. The identical bond lengths of 136 pm are due to the trigonal planar shape of CO32-, which results in all three bond lengths being identical. Therefore, the answer is: The identical bond lengths are due to the trigonal planar shape of CO32-.

To know more about bond lengths refer to:

https://brainly.com/question/31282969

#SPJ11

The resulting molarity of the given solution is 0.5 M.

NaOH (mw = 40) is produced by dissolving 20 grammes of the base in 1 litre of water. Find the molarity of this solution. Because molarity counts the number of moles in a litre of a solution, the solution is 0.5 molar.

The equation for calculating molarity from moles and volume is rather simple. Just multiply the moles of solute by the volume of solution.

Molarity=no:of moles/volume of solution(in l)

              =20/40

              =0.5

Become familiar with Molarity.Visit

brainly.com/question/8732513

#SPJ4

Answer:

it improves the accuracy of the results

The type of information given by IR spectroscopy is the functional groups in a molecule. Option (b).

IR spectroscopy is commonly used to identify the presence of specific functional groups in a molecule based on the characteristic absorption patterns of infrared radiation.

It provides valuable information about the types of bonds and functional groups present in a compound, such as hydroxyl groups (OH), carbonyl groups (C=O), amino groups (NH2), and many others. It does not provide information about the number of isotopes, mass, or the number of hydrogen atoms in a molecule.

To learn more about IR spectroscopy refer here:

https://brainly.com/question/31184017#

#SPJ11

Answer:

This would give us Helium 4.

Explanation:

Lithium7 has 3 protons, 4 neutrons and 3 electrons.

Removing  1 Proton 1 electron and 2 neutrons would form an element with

2 protons 2 electrons and 2 neutrons.

This is Helium 4.

Answer:

synthetic

Explanation:

The pH of a solution after 400.0 ml of 0.200 m hydrochloric acid, HCl, has been titrated with 0 ml, 320.0 ml, and 500.0 ml of 0.250 m sodium hydroxide, NaOH is 1.63.

The equation for the reaction is-

HCl + NaOH → NaCl + H₂O

Since, the number of moles of HCl is less than NaOH. Therefore, HCl is limiting, and the excess of NaOH is reacted with H₂O,

NaOH → Na+ + OH-

Here, mole of HCl = 0.4 × 0.2 = 0.08 mol

For NaOH added: 0.08 mol HCl requires 0.08 mol of NaOH for complete neutralization

0.08 - 0.08 = 0 mol of NaOH is left after the reaction with 320.0 mL

0.08 - 0.125 = -0.045 mol of NaOH left, which is not possible.

Hence, NaOH is completely reacted with 500.0 mL of HCl.

The concentration of HCl is 0.2 m, and the number of moles of HCl is 0.08 mol. Thus, 0.08 ÷ 0.4 = 0.2 M, the concentration of HCl remaining.

Then,0.125 mol of NaOH reacts with 0.08 mol of HCl.

Therefore, the moles of NaOH left with 320.0 mL = 0.125 - 0.08 = 0.045

The moles of NaOH remaining after 500 mL of HCl are reacted with NaOH = 0 mol. Thus, we can add up the moles of NaOH added to the total, which is 0.125 + 0.045 + 0 = 0.17 moles.

The concentration of NaOH is 0.25 M, and the volume of NaOH is 0.17 L, which yields 0.0425 moles of NaOH.

So, OH- concentration = moles of NaOH/total volume= 0.0425 / (0.4 + 0.32 + 0.5) L= 0.0425 / 1.22 L= 0.0348 M
pH = 14 - pOH = 14 - (- log 0.0348)= 14 + 1.46= 1.63

Therefore, the  pH is 1.63.

To learn more about "sodium hydroxide", visit:  https://brainly.com/question/23857994

#SPJ11

A negative (triangle) Hf for a molecule means that energy was released when the molecule was formed from its elements.

The symbol (triangle) Hf represents the enthalpy change during the formation of a molecule from its constituent elements. A negative (triangle) Hf indicates that the formation of the molecule is exothermic, which means that energy is released during the process. This energy release can be in the form of heat or light.


The enthalpy change during the formation of a molecule from its elements is an important thermodynamic parameter that provides information about the stability and reactivity of the molecule. A negative (triangle) Hf indicates that the formation of the molecule is energetically favorable, and the molecule is more stable than its constituent elements.

For example, the formation of water from hydrogen and oxygen molecules has a negative (triangle) Hf of -286 kJ/mol. This means that energy is released during the formation of water, and the reaction is exothermic. The negative (triangle) Hf value indicates that the products (water molecules) are more stable than the reactants (hydrogen and oxygen molecules).

On the other hand, a positive (triangle) Hf value indicates that the formation of the molecule is endothermic, which means that energy is absorbed during the process. This energy absorption can be in the form of heat or light. Positive (triangle) Hf values indicate that the products are less stable than the reactants and require energy input to form.

In conclusion, a negative (triangle) Hf for a molecule means that energy was released when the molecule was formed from its elements, and the formation of the molecule is exothermic.

To know more about enthalpy change, visit:

https://brainly.com/question/29556033

#SPJ11

The mass of water displaced by the block is 120 g. The buoyant force on the block is the product of its weight and g value that is 1.17 N.

The force that brings an object to float on a fluid is called buoyant force. It is directly proportional to the displaced mass of the fluid by the submerged object.

Given that, density of water = 1 g/cm³

volume of block = 120 cm³

then, displaced mass of water = density of water × volume of block

m = 120 g = 0.12 kg

Buoyant force = mass displaced × g

Fb = 0.12 × 9.8 N = 1.17 N

Therefore, the buoyant force on the block is 1.17 N.

Find more on buoyant force:

https://brainly.com/question/21990136

#SPJ1

\(CH_3CH_2OH\) is a polar compound and has hydrogen bonding. It has a higher boiling point. It will have the lowest vapor pressure among the three compounds.

Vapor pressure is the pressure produced by the vapors of a liquid in a sealed container when the liquid is heated. It is a property of a liquid that describes the tendency of a liquid to evaporate. It is measured in units of pressure, typically in mmHg or torr. The higher the vapor pressure, the more volatile a compound is. So, the decreasing order of vapor pressure for the given compounds is: \(CH_3CH_3 > CH_3CH_2F > CH_3CH_2OH\)

Here, \(CH_3CH_3\) is a non-polar compound while \(CH_3CH_2F\) and \(CH_3CH_2OH\) are polar compounds. The polar compound has hydrogen bonding, which increases the intermolecular forces between molecules. As a result, the polar compound will have a lower vapor pressure than the non-polar compound.

To learn more about vapor pressure click here https://brainly.com/question/25715932

#SPJ11

Answer:

C-C

A carbon has 4 valence electrons meaning it can share 4 electrons and is in short of 4 electrons to fill it outer energy shell making it 8. Which results to 2 double covalent bonds ,meaning there was a sharing of 2(4) = 8 electrons . Hope this helps . Your statement above is true .

The compound (CH3)2CHCH2Br is the least reactive compound by the SN1 mechanism among the options provided. This is due to the increased stability of the carbocation intermediate formed during the SN1 reaction, which is influenced by the presence of alkyl groups.

The SN1 mechanism involves a two-step process: the formation of a carbocation intermediate followed by the nucleophilic attack. In this case, we are comparing two compounds: CH3CH2CH2CH2Br (option a) and (CH3)2CHCH2Br (option b).

In option a, CH3CH2CH2CH2Br, the carbon attached to the bromine (the reaction center) is a primary carbon, meaning it has only one alkyl group attached to it. Primary carbocations are highly unstable due to the lack of nearby alkyl groups to stabilize the positive charge. As a result, the formation of the carbocation intermediate is less favorable, making this compound more reactive via the SN1 mechanism.

In option b, (CH3)2CHCH2Br, the carbon attached to the bromine is a tertiary carbon, meaning it has three alkyl groups attached to it. Tertiary carbocations are more stable than primary carbocations due to the presence of nearby alkyl groups, which can donate electron density and stabilize the positive charge. Therefore, the formation of the carbocation intermediate is more favorable, making this compound less reactive via the SN1 mechanism.

In summary, (CH3)2CHCH2Br is the least reactive compound by the SN1 mechanism because the tertiary carbocation intermediate formed is more stable compared to the primary carbocation intermediate in CH3CH2CH2CH2Br.

Learn more about nucleophilic attack  here:

brainly.com/question/28325919

#SPJ11

Answer:

CaCO3------->CaO + CO2

Heat

I think the answer should be protons

Answer:

0.086

Explanation:

got it on acellus

The mass of the dry solute recovered from the given data is 0.086 g.  Option C

To determine the mass of the dry solute recovered, we need to subtract the mass of the boat from the mass of the boat with the dry solute.

Given the data provided:

Boat Mass: 0.730 g

Boat + Solution: 0.929 g

Boat + Dry: 0.816 g

To find the mass of the dry solute, we subtract the boat mass from the boat + dry mass:

Mass of Dry Solute = (Boat + Dry) - (Boat Mass)

Mass of Dry Solute = 0.816 g - 0.730 g

Mass of Dry Solute = 0.086 g

Therefore, the correct answer is c) 0.086 g.

The mass of the dry solute recovered from the given data is 0.086 g. It is important to note that the mass of the dry solute is obtained by subtracting the mass of the boat from the mass of the boat with the dry solute, as the boat mass represents the weight of the empty boat or container used in the experiment.

For more such questions on solute visit:

https://brainly.com/question/25326161

#SPJ8

Answer:

communicating

Explanation:

Answer:Nhóm gồm tất cả các kim loại tan trong axit sunfuric đặc nóng nhưng không tan trong axit sunfuric lo

Al, Cu, Au.

Al, Fe, Cr.

Ag, Fe, Pt.

Ag, Cu, Hg.

Explanation:

Solution: Water is liquid at room temperature because the molecules of water are bound by H bonding so the water molecules are not able to move freely and behave as a liquid.

Solid, liquid and gases differ in their densities, their arrangement of atoms/ molecules and their bonding or force of attraction between the atoms/ molecules. Water is liquid because molecules of water have medium intermolecular space between them and weak force of attraction which allow the molecules of water to move within the limit so it can only flow. Another reason for the liquid nature of water is presence of H bonding which hold the water molecules and don’t let them move freely. The energy needed to break the H bond is moderate and not available at room temperature. Hence water is liquid at room temperature.

Learn more about solid, liquid and gas here:

https://brainly.com/question/9402776

#SPJ4

Answer:

Try to make it more detailed "Chemistry is the study of all substances" is an amazing start. Can you give some examples of chemistry? Try to make a small paragraph.

Explanation:

Explanation:

Chemistry, the science that deals with the properties, composition, and structure of substances (defined as elements and compounds), the transformations they undergo, and the energy that is released or absorbed during these processes.

This is a more detailed answer...

The correct answer is Carbon Monoxide (CO). When organic matter is burned with insufficient oxygen, it leads to incomplete combustion and the production of various gases, including carbon monoxide. Carbon monoxide is a colorless, odorless gas that is extremely poisonous and can be fatal in high concentrations.Carbon dioxide (CO2) is a product of complete combustion and is not produced when there is insufficient oxygen.Benzene is a hydrocarbon compound composed of six carbon atoms and six hydrogen atoms, and it is not produced from combustion.Methane (CH4) is a hydrocarbon compound composed of one carbon atom and four hydrogen atoms, and it is not produced from combustion.Mercury is a metallic element and is not related to combustion.

Answer:

A 0.60 mol sample of PCl 3 (g) and a 0.70 mol sample of Cl 2 (g) are placed in a previously evacuated 1.0 L container, and the reaction represented

Explanation: