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express with equations the transformations marked on the scheme

Answer: The balanced chemical equation is \(2NaNO_{3}(s) + Heat \rightarrow 2NaNO_{2}(s) + O_{2}(g)\) and it is a decomposition chemical reaction.

Explanation:

A chemical reaction in which single compound is decomposed into two or more species is called a decomposition reaction.

For example, \(NaNO_{3}(s) + Heat \rightarrow NaNO_{2}(s) + O_{2}(g)\)

As the compound \(NaNO_{3}\) is decomposing to given two different substances. So, it is a decomposition reaction.

Here, the number of atoms on reactant side are as follows.

The number of atoms on product side are as follows.

To balance this equation, multiply \(NaNO_{3}\) by 2 on reactant side and multiply  \(NaNO_{2}\) by 2 on product side. Therefore, the equation will be rewritten as follows.

\(2NaNO_{3}(s) + Heat \rightarrow 2NaNO_{2}(s) + O_{2}(g)\)

Here, number of atoms on reactant side are as follows.

The number of atoms on product side are as follows.

Hence, this equation is balanced.

Thus, we can conclude that the balanced chemical equation is \(2NaNO_{3}(s) + Heat \rightarrow 2NaNO_{2}(s) + O_{2}(g)\) and it is a decomposition chemical reaction.

Answer

Volume of O2 = 1326 L

Explanation

Given:

2C8H18(I) + 25 O2 (g) = 16 CO2(g) + 18 H2O (g)

moles of gasoline = 4.00 mol

Pressure = 0.953 atm

Temperature = 35 C = 308 K

Required: volume of oxygen

Solution

Step 1: use stoichiometry to find the moles of oxygen

The molar ratio between gasoline and O2 is 2:25

Therefore the moles of o2 = 4.0 mol x (25/2) = 50.0 mol

Step 2: Calculate the volume using ideal gas law

PV = nRT

V = nRT/P

V = (50.0 x 0,08206 x 308)/0.953

V = 1326 L

Answer: Where are the answers?

Explanation:

Answer:

I think it's C. 6.022 * 1023

Answer:

Sulfur trioxide

Sulfur trioxide | SO3 - PubChem.

Explanation:

Answer:

I don't know how to do this

sorry I can't able to help you

Explanation:

\(hii\)

have a nice day ✌️

The approximate value of the length of the C≡C bond in ethyne, HC≡CH, is 1.20 angstroms.

Ethyne, also known as acetylene, is a hydrocarbon compound that contains a triple bond between two carbon atoms. The length of this bond is shorter than a single or double bond, due to the increased overlap of the orbitals and the stronger attraction between the nuclei and the shared electrons. As a result, the C≡C bond in ethyne has an approximate length of 1.20 angstroms, or 120 picometers. This value is based on measurements using techniques such as X-ray diffraction and is commonly used in the field of chemistry to describe the properties of molecules.

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During the formation of a water molecule, we focus on the oxygen atom. In hybridization of H2O, the oxygen atom is sp3hybridized.

Answer:

The plates can be thought of like pieces of a cracked shell that rest on the hot, molten rock of Earth’s mantle and fit snugly against one another. The heat from radioactive processes within the planet’s interior causes the plates to move, sometimes toward and sometimes away from each other.

Answer:

I feel like the answer is A) true

Explanation:

you create a model to help your audience understand your complex idea. There have been models made to represent ideas that we cannot see.

Answer:

eswl uses shock waves to break kidney stones into small pieces that can more easily travel through the urinary tract.

Explanation:

hope this helps

Answer:

Examples of longitudinal waves include: sound waves. ultrasound waves. seismic P-waves.

Explanation:

Answer:

False

Explanation:

Temperature is also heat energy, so chemical energy has no affect over it.

Answer:

False

Explanation:

The chemical energy in a substance is determined by the potential energy of the bonds of the products formed when it reacts.

The Density of a substance is simply defined as the mass of the subtance per unit volume of the substance i.e

Density = mass /volume

To solve the question given above, we'll begin by calculating the volume of the zinc. This can be obtained as follow:

Density of Zinc = 7.10 g/cm³

Mass of Zinc = 46.77 g

Density = mass /volume

7.10 = 46.77 / Volume

Cross multiply

7.10 × Volume = 46.77

Divide both side by 7.10

Volume = 46.77 / 7.10

Finally, we shall determine the new volume of the water. This can be obtained as follow:

Volume of Zinc = 6.59 cm³ = 6.59 mL

Volume of water = 33.33 mL  

New volume of water = (Volume of Zinc) + (Volume of water)

New volume of water = 6.59 + 33.33

Therefore, the new volume of water is 39.92 mL

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Answer:

✓ Reactants

✓Reactants

✓ product

Explanation:

The substance(s) to the left of the arrow in a chemical equation are called ..................

A ............... is a substance that is present at the start of a chemical reaction.

A ................. is a substance that is present at the end of a chemical reaction.

Reactants are substances that undergo chemical reaction and are present at the beginning of the reaction and are consumed during the process of the reaction to form a product.

2H2 + O2 ------>2H2O

Here H2 and O2 are Reactants while water H2O is the product ( water)

Products are species that are produced after the chemical reaction have taken place.

Answer:

To calculate the pH of an aqueous solution you need to know the concentration of the hydronium ion in moles per liter (molarity). The pH is then calculated using the expression: pH = - log [H3O+].

Example: Find the pH of a 0.0025 M HCl solution.

The number of molecules in 10.0 gram of NaOH is 15 * 10²².

To solve this question, we need to understand some terms of mole concept,

Mole - It is the amount of substance containing same number of molecules or atoms as there are atoms in 12 gram of carbon-12 isotope.

Molecules - It is group of atoms bonded together, representing the smallest fundamental unit of a chemical compound taking part in chemical reaction.

Molecular weight - The sum of atomic masses of all atoms in molecules.

Avogadro number - It is the number of atoms, ions, electrons, molecules in one mole of substance. It is represented as NA.

NA = 6.0 * 10²³ (approx)

To calculate the number of molecules, we apply the formulae,

no. of molecules = moles * NA

moles = weight / molecular weight

moles = 10.0 / 40

          = 0.25

Substituting this value to calculate number of molecules,

no. of molecules = 0.25 * 6.0 * 10²³

                            = 15 * 10²²

Therefore the number of molecules of in 10.0 g of NaOH is 15 * 10²².

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Answer:

Chlorine has 17 total electrons with electron configuration 1s^2 2s^2 2p^6 3s^2 3p^5.

What are the first two quantum numbers for the six electrons in the 2p subshell?

Explanation:

The principal quantum number represents the shell number in which the electron is present.

It is represented with "n".

The next quantum number is the azimuthal quantum number.

It represents the shape of the orbital.

It has values from 0 to (n-1).

Its value depends on the principal quantum number.

Chlorine has 17 total electrons with electron configuration 1s^2 2s^2 2p^6 3s^2 3p^5.

For the six elecetrons in 2p subshell:

The first two quantum number values are the same and their values are:

n=2 , l=1.

Answer:

lowest to Highest

Carbon atom

Methane molecule (CH4)

Graphite

Diamond

Explanation:

A carbon atom would be the lowest complexity on this list, that is because it is a lone molecule with no other bonding between other atoms. The same forces interacting between the carbon atom would be the same for the others.

Next would be methane. Methane is a hydrocarbon composed of a single carbon atom bonded covalently with four hydrogens. The electrons within the hydrogen atoms repel each other causing them to be dispersed around the carbon atom to form a   tetrahedral shape. While more complex, the other two are continuous structures made from carbon atoms bonded to gather to form crystal structures.

Graphite is considered to be a crystal structure, just like a diamond. However, the biggest difference between them is their atomic and crystal frameworks. Diamonds have a rigid 3-dimensional structure whilst graphite is composed of 2d planes of graphite with carbon-carbon double bonds connecting the layers. Due to this, a diamond would be more complex then grpahite

The volume that is occupied by the gas is obtained as  56 L.

We know that from the Avogadro's law, the volume that can be occupied by one mole of a gas is obtained as 22.4 L. This implies that we have to find the number of moles in the 70 g of the CO and then obtain the corresponding volume by simple proportion.

Number of moles of CO = 70.0 g/28 g/mol

= 2.5 moles

If 1 mole of the gas occupies 22.4 L

2.5 moles of the gas occupies 2.5 * 22.4/1 mole

= 56 L

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The right answer is Proton.

Additional Information:

There are three types of subatomic particles. They are:

Proton is a positively charged particle,Electron is negatively charged particle and Neutron is charge less.

Hope it will be helpful to you...

Answer:

8 moles of oxygen.

Explanation:

The chemical formula for barium hydroxide is Ba(OH)₂

This means one mole of barium hydroxide contains one mole of barium, two moles of hydrogen, and two moles of oxygen. If you have four moles of Ba(OH)₂ you will have four times the amount that is found in one mole.

4 moles of Ba(OH)₂ will have 8 moles of oxygen.

The number of moles of oxygen atoms we have in the compound is 8 moles .

The chemical equation for barium hydroxide is as follows:

Ba(OH)₂

According to the compound we have 1 atom of barium, 2 atoms of oxygen and 2 atoms of hydrogen.

Therefore, 4 moles of the compound can be represented as follows;

4 Ba(OH)₂

This means we have 4 atoms of barium, 8 atoms of oxygen and 8 atoms of hydrogen.

Therefore, we have  8 moles of oxygen atoms or 4 moles of oxygen molecules.

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Answer:

Subconscious - psychic activity just below the level of awareness

Election - the act of electing someone

Explanation:

I hope this helped enough, good luck in chemistry!