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Write the chemical formula for the covalent compounds below
EXAMPLE- dinitrogen trioxide= N2O3

nitrogen monoxide =
dihydrogen oxide =
diphosphorus pentoxide =
sulfur trioxide =

Answer:

14.67

Explanation:

x

Explanation:

The number of electrons, in turn, determines the chemical properties of the atom. Protons contribute to the mass of an atom and provide the positive charge to the nucleus. The number of protons also determines the identity of the element

Answer:

Question 1: (A)

The number of electrons determine the chemical properties of an atom.

Question 2:  (C)

Test tube cannot measure the volume of liquids rather they are used in chemical reactions

Question 3: (D)

Pauli's Exclusion Principle states that no two electrons in the same atom can have identical values for all four of their quantum numbers.

Answer:

covalent bonds

Explanation:

The theoretical yield of water formed from the reaction of 4.57 g of octane and 20.6 g of oxygen gas is 0.519 g. Rounded to 3 significant figures, the answer is 0.520 g.

2 C₈H₁₈ + 25 O₂ → 16 CO₂ + 18 H₂O

According to the balanced chemical equation, 2 moles of octane react with 25 moles of oxygen gas to produce 18 moles of water. 

moles of octane = mass of octane / molar mass of octane

moles of octane = 4.57 g / 114.23 g/mol = 0.0400 mol

moles of oxygen gas = mass of oxygen gas / molar mass of oxygen gas

moles of oxygen gas = 20.6 g / 32.00 g/mol = 0.644 mol

moles of water = moles of octane × (18/2) / (25/2) = 0.0400 mol × 18/25 = 0.0288 mol

mass of water = moles of water × molar mass of water

mass of water = 0.0288 mol × 18.02 g/mol = 0.519 g

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The substance in the image above would be classified as a mixture of elements (option E).

A compound is a substance formed by chemical bonding of two or more elements in definite proportions by weight.

On the other hand, a mixture is made when two or more substances are combined, but they are not combined chemically.

According to this question, an image is shown with two different substances or elements as distinguished by coloration (white and purple). These elements are combined but not chemically bonded, hence, is a mixture.

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Answer:

Explanation:

2 S-II - 12 e- → 2 SIV (oxidation)

6 O0 + 12 e- → 6 O-II (reduction)

2 HgS (s) + 3 O2 (g) → 2 HgO (s) + 2 SO2 (aq)

This is an oxidation-reduction (redox) reaction:

2 S-II - 12 e- → 2 SIV (oxidation)

6 O0 + 12 e- → 6 O-II (reduction)

HgS is a reducing agent, O2 is an oxidizing agent.

The coefficients added to Hg S, 02, Hg O and SO2 to balance this equation are 2, 3, 3,2 respectively.

A balanced equation has the same number of atoms on the reactant and product sides for each element involved in the reaction.

The balanced equation for this reaction is:

2HgS + 3O2 -------> 2HgO + 2SO2

This chemical reaction demonstrates the conservation of mass as the same number of atoms of each element appear on either side of the equation.

This means that the total mass of atoms on the reactant side of the equation will equal the total mass of atoms on the product side of the equation.

Therefore the coefficients added to Hg S, 02, Hg O and SO2 to balance this equation are 2, 3, 3,2 respectively.

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Answer:

d. NH4+ and C2H3O2- ions

Explanation:

When ammonium acetate (NH4C2H3O2) is mixed with water, it dissociates into its ions. In this case, it dissociates into NH4+ (ammonium ion) and C2H3O2- (acetate ion). Therefore, the solution will contain NH4+ and C2H3O2- ions dissolved in water.

The solution contains NH4+ and C2H302 ions. Among the given options, the correct answer is option d. It forms a solution containing NH4+ and C2H302 ions that are fully dissolved in the water.

When a chemist mixes ammonium acetate into 500 mL of water, the ammonium acetate (NH4C2H3O2) dissolves and dissociates into its constituent ions. This results in the formation of NH4+ ions (ammonium ions) and C2H3O2- ions (acetate ions) in the solution. Ammonium acetate is a salt that readily dissolves in water, dissociating into NH4+ and C2H302 ions. The aqueous solution will contain NH4+ ions and C2H3O2- ions, which are formed due to the dissociation of ammonium acetate in water. These ions will be dispersed throughout the solution and will not sink to the bottom.

In conclusion, when ammonium acetate is mixed into water, it forms a solution containing NH4+ and C2H302 ions that are fully dissolved in the water.

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Answer:

The freezing of water into ice causes the cracks to widen because it occupy more space.

Explanation:

When the water change its state of liquid to solid state due to decrease in temperature, it contracts means occupy less space but when the temperature reaches to 4 degree Celsius, it starts to expand. When the temperature goes below 0 degree Celsius, it will cause more expansion and occupy more space that causes the cracks to widen.

Answer:

from which chapter is this question

Orbitals that are described by each of the combinations quantum numbers ; n = 3, ℓ =2 orbitals n = 4, ℓ = 2 is 5. ml=2 here is referring to last(5th) orbital space 4d.

In atomic theory and quantum mechanics, atomic orbital is a function describing the location and wave-like behavior of electron in an atom.

Quantum numbers  (n, l, ml, ms )

n=3, refers to 3rd energy level      

3rd energy level has 3 possible values of l  and d has 5 different orientations.

s=0   p=1    d=2

--> -2,-1,0,1,2

When; n=3 l=2, then number of orbitals is 5.

n=4 refers to 4th energy level ;        

4th level has 4 possible l values;      

s=0 p=1 d=2 f=3        

When, n=4   l=2 and  ml=2  

The number of orbitals is 5 and  ml=2 is referring to last(5th) orbital space 4d.

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97.6% of the molecules in the mixture are monatomic. The specific heat ratio y is defined as the ratio of the heat capacity at constant pressure to the heat capacity at constant volume, and it is related to the degrees of freedom of the molecules in the gas.

For a monatomic gas, each atom has three degrees of freedom (translational motion in three directions), while for a diatomic gas, each molecule has five degrees of freedom (three translational and two rotational). Therefore, the specific heat ratio for a mixture of monatomic and diatomic gases can be expressed as:

y = (f1 + f2) / (f1 + (5/3) * n2)

where f1 and f2 are the degrees of freedom of the monatomic and diatomic gases, respectively, and n2 is the fraction of diatomic molecules in the mixture. Rearranging this equation, we can solve for n2:

n2 = (3 * (y - 1) - f1) / 5

Since we know that y = 1.62, we need to determine the degrees of freedom of the monatomic gas, f1. Since each atom has three degrees of freedom, we can assume that the monatomic gas has f1 = 3. Plugging in these values, we get:

n2 = (3 * (1.62 - 1) - 3) / 5 = 0.024

Therefore, the fraction of diatomic molecules in the mixture is 0.024, which means that the fraction of monatomic molecules is:

1 - n2 = 1 - 0.024 = 0.976

So, approximately 97.6% of the molecules in the mixture are monatomic.

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Answer:

it should test one variable at a time.

Explanation:                                                                                                  because you will not be able to tell which variable is responsible for the observed results.

The correct statement about pericyclic reactions is:

In pericyclic reactions, all bonds are broken and formed in a single step.

Pericyclic reactions are a class of organic reactions characterized by the simultaneous breaking and forming of multiple bonds in a concerted manner, meaning that all bond changes occur in a single step. This is in contrast to stepwise reactions where bonds are broken and formed in separate steps.

In a pericyclic reaction, the reactants rearrange their electrons in a concerted fashion, leading to the formation of new bonds and the breaking of existing bonds. This concerted process occurs through the overlap of molecular orbitals, allowing for the efficient transfer of electrons.

Pericyclic reactions are concerted reactions in which the breaking and forming of bonds occur simultaneously in a single step. They do not involve multiple steps or intermediates. The transition state in a pericyclic reaction is cyclic, not acyclic.

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Answer:

C: atomic mass

Explanation:

Answer:Atomic mass

Explanation:

is this physics question or chemistry

because the only part of chemistry that has to do with measurements of gases

is standard temperature and pressure.

and when solving this you need two value for either pressure and temperature

then we would need to find one unknown value

just reply me I would help you in any way possible

Polymerization of ethylene gives C. Polyethylene.

Ethylene is a simple hydrocarbon with the formula C2H4. During polymerization, many ethylene molecules join together to form a larger molecule called polyethylene. This process is known as addition or chain-growth polymerization. In this reaction, the double bond between the carbon atoms in ethylene molecules is broken, and new single bonds are formed to connect the ethylene units, creating a long chain of repeating ethylene units in the polyethylene molecule. Polyethylene is a versatile and widely used plastic, commonly found in products such as plastic bags, bottles, and food packaging. Therefore the correct option is  C. Polyethylene

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Lewis formula for C4H6: Since C4H6 is composed up of covalent bonds, the total number of electrons will equal the sum of the electrons in carbon and hydrogen, providing there is no residual charge.

The hydrogen atom has one electron, while the carbon atom has six.

As a result, there will be a total of = (4 6) + (6 1) = 30 electrons.

Steps to draw lewis structure

Find the polyatomic ion or molecule's total number of valence electrons. Add one electron for each negative charge if the compound is an anion. For each positive charge if the substance is a cation, take one electron away.

The least electronegative element other than hydrogen makes up the centre atom. Single bonds join it to the outside atoms.

Fill the outside atoms' octets.

Fill the centre atom's octet.

Form several bonds until the core atom has an octet if you run out of electrons before it does.

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Answer:

D.Cell wall

Explanation:

Cell wall is a distinct feature that is mainly seen in plant cells (mostly made of Cellulose) or in prokaryotic cells like bacteria.

hope this helps you :)

The gas is expected to have highest boiling point with Van der Waal's constant "a" is gas D (Option D)

The Van der Waal's equation can be represented as follows:

P = nRT / (V-nb) - an²/V²

where a and b are constants known as Van der Waal's constant. In the given question, the boiling point of the gas is directly proportional to Van der Waal's constant "a". The higher the value of constant a, the higher the boiling point of the gas. Therefore, the gas with the highest boiling point will have the highest Van der Wall's constant "a".

The values of Van der Wall's constant "a" are given for four different gases.

The gas with the highest value of Van der Waal's constant "a" is gas D, which is expected to have the highest boiling point. Therefore, Gas D (Option D) is expected to have the highest boiling point.

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Answer:

See explanation

Explanation:

Renewable energy resources refers to energy resources  that can not be depleted such as wind, solar, biomass etc.

Non-renewable energy resources refers to those energy resources that can be depleted such as fossil fuels.

Globally, it has been established that energy from renewable sources costs less than energy from nonrenewable(especially fossil fuel) sources.

According to Forbes, 2019, "The worldwide weighted average cost of electricity from solar power concentration fell by 26%, that of bioenergy reduced by 14%, solar photovoltaics, geothermal, onshore, as well as offshore wind, fell by 14%, and hydropower by 12%.".

This shows us that renewable energy remains the cheapest alternative in terms of energy cost.

Dams and reservoirs can provide reliable water storage but have potential environmental impacts such as habitat loss and disruption of natural flow.

Sedimentation can reduce the storage capacity of reservoirs over time, requiring periodic dredging or desilting to maintain efficiency. Evaporation can lead to water loss from the reservoir, particularly in arid or semi-arid regions with high evaporation rates. These factors need to be carefully managed to ensure the long-term sustainability and efficiency of water storage.

Sedimentation and evaporation are important considerations that need to be managed. Social and economic impacts should also be assessed. Alternative approaches and improved water management practices can enhance sustainability and efficiency. Careful planning, impact assessments, stakeholder engagement, and monitoring are crucial for mitigating negative impacts and maximizing benefits.

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16.01  grams of oxygen must have reacted .

Calculation :

Reaction :      2Cu + O₂  ->  2CuO

Theoritical moles of   Cu : O₂  = 2 : 1

Moles of Cu = mass/molar mass = 63.6/63.546 = 1.001 mol

Moles of O₂  = mass/molar mass  = 71.6/32.0 = 2.238 mol

Experimental of Cu  : O₂   =   1.001  :  2.238   =   0.4  : 1.0

Excess reactant is O₂

Limiting reactant is Cu

Moles of O₂ reacted = 0.5*moles of Cu

moles of O₂ reacted = 0.5 x 1.001  = 0.5004 mol

mass of O₂ reacted  =  moles x molar mass  =  0.5004 x 32.00 = 16.01 g

mass of O₂ reacted is  16.01 g

A chemical reaction is the process of chemical transformation of one group of chemicals into another group.  Classical chemical reactions involve changes that affect only the position of electrons in forming and breaking chemical bonds between atoms, with no changes in the nucleus (no changes in the elements present) and many If , it can be described by a chemical equation. Nuclear chemistry is a subfield of chemistry that deals with chemical reactions of unstable radioactive elements in which both electronic and nuclear changes can occur.

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Answer:

1.38 moles

Explanation:

My teacher gave us the answer on a quiz so here if y’all want a explanation I’ll give y’all one tho

Answer:

An atom that has a negative or positive charge it is called an ion.

Answer:

It''s called a Cation

Explanation:

132.2 g of MgSO₄ contains 4.392 moles of oxygen ions.

To determine the number of moles of oxygen atoms in 132.2 g of MgSO₄, we need to first calculate the number of moles of MgSO₄, and then use its chemical formula to determine the number of oxygen atoms present.

The molar mass of MgSO₄ can be calculated by adding the atomic masses of its constituent elements, which are 24.31 g/mol for Mg, 32.06 g/mol for S, and 4x16.00 g/mol for O, respectively. Therefore, the molar mass of MgSO₄ is:

molar mass of MgSO₄ = 24.31 + 32.06 + 4(16.00) = 120.37 g/mol

Next, we can calculate the number of moles of MgSO₄ in 132.2 g as follows:

moles of MgSO₄ = mass of MgSO₄ / molar mass of MgSO₄

moles of MgSO₄ = 132.2 g / 120.37 g/mol

moles of MgSO₄ = 1.098 mol

Finally, we can use the chemical formula of MgSO₄ to determine the number of moles of oxygen atoms present in 132.2 g of MgSO4. The formula of MgSO₄ indicates that there are four oxygen atoms per molecule of MgSO₄. Therefore, the number of moles of oxygen atoms in 132.2 g of MgSO₄ is:

moles of oxygen atoms = moles of MgSO₄ x 4

moles of oxygen atoms = 1.098 mol x 4

moles of oxygen atoms = 4.392 mol

Therefore, there are 4.392 moles of oxygen atoms in 132.2 g of MgSO₄

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The false statement is applied pressure only refers to atmospheric pressure and the correct option is option 1.

It is the ratio of the force applied to the surface area over which the force is applied. Pressure can be defined as the force applied perpendicular to the surface of an object per unit area over which that force is distributed. Atmospheric pressure is the pressure exerted by the atmosphere on the earth.

Thus applied pressure not only represents atmospheric pressure.

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Answer:

there it is fella tried on ma own consciousness

Answer:

As a substance melts, and goes from a solid to a liquid state, the kinetic energy of the molecules increases, and the molecules move faster, and they separate further and further away from each other.  The intermolecluar forces holding the molecules together become weaker.  This is why a liquid can take fill the shape of its container, whereas a solid has a fixed shape.

Explanation:

take your notes man