The reversible reaction, 2NO{g) ⇌ N2 (g) + O2 (g), would be classified as a __________________ reaction.
homogeneous
heterogeneous
endothermic

Answer:

See figure 1

Explanation:

In this case, we have to start with the ionization reaction of HBr to produce the hydronium ion (\(H^+\)) and the bromide ion (\(Br^-\)). Then the double bond in the alkene can attack the hydronium ion to produce a carbocation. The most stable carbocation would be the tertiary one, therefore we have to put the positive charge in the tertiary carbon. Then, the bromide attacks the carbocation to produce the final halide.

See figure 1

I hope it helps!

Answer: Spun yarn is made by twisting staple fibers together

To make a cohesive thread Or “single”. Twisting fibers, into yarn in the process called spinning can be dated back to the upper Paleolithic. Yarn spinning was one of the first processes to be industrialized.

Explanation:

Answer:

Stretching is the lengthening and contraction is the shortening

Explanation:

Unless it's asking for eccentric as the stretching and concentric as the shortening

Answer: You have it right

Explanation:

you put the two on the H2O to make it 2H2O and A two on the HNO3 to make it 2HN03 To make it balanced, good job

The statement "It has the same concentration of hydronium and hydroxide ions"  is true about a neutral solution.

If you've ever wondered what constitutes a neutral solution - it's one with an ideal pH balance set at precisely 7. Referred to as a 'neutral' because it doesn't lean towards acidity or alkalinity due to an equal concentration rate between hydronium ions (H+) and hydroxide ions (OH-).

Noteworthy examples can include distilled water, pure water, blood seawater, milk of magnesia among others.

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Taking into account the reaction stoichiometry, you can observe that:

In first place, the balanced reaction is:

Ca₃P₂ + 6 H₂O  → 3 Ca(OH)₂ + 2 PH₃

By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:

The molar mass of the compounds is:

Then, by reaction stoichiometry, the following mass quantities of each compound participate in the reaction:

Then, by reaction stoichiometry, you can observe that:

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Answer:

Explanation:

Hey there!

From question;

The molecular mass of NH₄OH is 35.

Avogadro number = 6.023*10²³ molecules.

Then,

From mole concept,

Molecular mass =  Avogadro number

So, 35 grams contains  6.023*10²³ molecules.

1 gram contains \(\frac{ 6.023*10^{23} }{35}\) molecules.

52.1 grams contains \(\frac{6.023*10^{23} }{35} *52.1\) molecules.

Therefore, 52.1 grams contains 8.96*10²³ molecules.

Hope it helps!

Answer:

The nucleus contains all of the genetic material for a eukaryotic cell, but this genetic material needs to be protected.

Explanation:

Hopes this helps

Answer:

False

Explanation:

Atoms are neutral Ions carry a charge. Take a look at the groups in the periodic table for extra help in understanding this.

Answer:n a  red blood cell, the control center is the nucleus. A mitochondria is not a nucleus. It is another organelle that produces energy for the cell.

Explanation:

When the two vehicles collide, then vehicle with slow speed will pushes back.

Speed of any moving body is define as the distance travelled by that body in per unit of time.

As it is mentioned that one car has a speed of 30 mph and another one has a speed of 60mph, if both of these cars get collide then the car with high speed pushed back the car with low speed.

Hence the car with slow speed pushed back.

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Atom A and B both have 10 protons A have 10 B has 11 neutrons is A and B are isotopes of same element.

Isotopes are the atoms of same elements , that has same number of proton but different number of neutrons , mass no. is depends on neutrons present in an atom. the given situation is :

                  number of proton      number of neutron

Atom A                10                               10

Atom  B                10                               11

Isotopes are the members of the same family of same elements.

Thus, Atom A and B both have 10 protons A have 10 B has 11 neutrons is A and B are isotopes of same element.

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Answer:

According to the Brønsted definition, an acid is a substance capable of donating a proton, and a base is a substance capable of accepting a proton. ... The species giving up the proton is HCl, an acid. The species accepting the proton is water, the base. The species Cl- is the conjugate base of HCl.

Answer: glucose

Explanation:

Correct option is c) One atom is now positively charged, and the other is negatively charged. This is due to nature of ionic bond.

An ionic bond is formed when one or more electrons are transferred from one atom to another, resulting in the formation of two oppositely charged ions. In an ionic bond, the electron(s) transferred from one atom are accepted by the other atom, leading to the formation of cations and anions.

The atom that loses an electron becomes a positively charged ion (cation), and the atom that gains an electron becomes a negatively charged ion (anion). The opposite charges of the ions attract each other and form an ionic bond between the two atoms.

Ionic bonds usually occur between atoms of different elements with a significant difference in electronegativity. Ionic compounds generally have high melting and boiling points, are solid at room temperature, and are usually soluble in water.

In contrast to an ionic bond, a covalent bond is formed when atoms share electrons, as in the case of molecular compounds. In a covalent bond, atoms do not become charged. Instead, they share electrons in a way that allows them to complete their valence shells.

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Explanation: the resistance that one surface or object encounters when moving over another.

or

the action of one surface or object rubbing against another.

Answer: a force that resists the motion of one object against another

Answer: the answer you are looking for does not exist

Explanation:

Compared to 2,3,4-trifluoropentane, the nonane's carbon chains are longer.

A substance's molar mass is defined as its molecular weight in grams. By adding the molar masses of a substance's constituent atoms, we may get the substance's molar mass. Then, to convert between mass and the quantity of moles of the material, we may utilize the computed molar mass.

Adding the atomic masses of a particular substance results in the calculation of molar mass. Below each element's symbol on the periodic table is a designation of the mass of that specific element. The molar mass is obtained by averaging the atomic masses obtained from the periodic table.

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If 100 grams of reactants completely react to form the products in a reaction, the amount of products produced will also be 100 grams.

The law of mass conservation states that in a closed system, the total mass remains constant before and after a chemical reaction. This means that the mass of the reactants is equal to the mass of the products.

To solve the given problem, the law of mass conservation can be applied by assuming that the reaction is complete.

Thus, if 100 grams of reactants completely react, it implies that the total mass of the products formed will also be 100 grams, assuming no other substances are involved in the reaction.

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From the attached image, the percentage abundance of 18 medium nails 5 cm long is 19%

The percent abundance refers to the proportion or percentage of a certain type or category within a given sample or population.

In the case of 18 medium nails that are 5 cm long, we have the information presented in the table and we do not need to do any mathematical calculations.

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The unknown metal with C(metal) of 0.90J/gC and mass of 4.67g is aluminum.

The metal's specific heat is calculated using the heat equation. It is important to note that the total heat (Q), which is the sum of the two heats (Qwater and Qmetal), is equal to zero at equilibrium.

Now, Q(total)=Q(water)+Q(metal)

0=m(water)

The specific heat of water, C(water), is equal to 4.18 J/g, while the other two components are water and metal.

The temperature of a metal is known as C(metal).

With the given values all substituted, we obtain 0=m(water) C(water)T(water) +m(metal).

CmetalΔTmetal=(24.3g)(4.184J/g°C) (24.6°C−21.7°C)+(4.67g) (Cmetal)(24.6°C−95.1°C)

The metal's specific heat is given by the equation C(metal)=0.90J/gC, which is simplified by placing C(metal) on one side of the equation.

Part (b):As a result, aluminum is the metal.

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Explanation:

by dissolving the mixture of lead sulphate and lead chloride in water we can separate the two. after dissolving the mixture on water lead sulphate can be obtained as the solid that 's left behind lead chloride can be recovered by evaporating.

Answer:

I think the answer is A

Explanation:

the temperature of solids , liquids and gases can be easily measured

The electron changes from a higher energy level to a lower energy level, and a photon is emitted.

What is electrons?

Electrons are the smallest and most fundamental particles that make up matter. They are negatively charged particles that exist in the orbits of atoms and molecules and that participate in chemical reactions. Electrons are found in all atoms, and determine the chemical properties of the atom. They are also responsible for electricity and magnetism, and can be used to create electrical current in circuits. Electrons have a very small mass and move around the nucleus of an atom very quickly. In addition, electrons can be excited by certain energies, causing them to move to higher energy levels, where they can then be used to create electrical current.

Therefore, The electron changes from a higher energy level to a lower energy level, and a photon is emitted.

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Answer:

4.83% of acetic acid in the vinegar

Explanation:

The neutralization reaction of acetic acid (CH₃COOH) with sodium hydroxide (NaOH) is:

CH₃COOH + NaOH → CH₃COO⁻Na⁺ + H₂O

Assuming the sodium hydroxide solution has a concentration of 0.500M, moles used in the neutralization reaction are:

0.0185L × (0.500mol / L) = 0.00925 moles of NaOH = 0.00925 moles CH₃COOH

Because 1 mole of acid reacts per mole of NaOH

Using molar mass of acetic acid (60g/mol):

0.00925moles CH₃COOH ₓ (60g / mol) = 0.555g of CH₃COOH

As mass of vinegar sample is 11.5g (d = 1g/mL), percentage of acetic acid by mass is:

0.555g CH₃COOH / 11.5g vinegar × 100 = 4.83% of acetic acid in the vinegar

\( { \bf\implies 17.99u}\)

To find atomic mass of water (\(\bf{H_2O}\))

We know that,

\(\mapsto\)1 × 2 + 15.99 × 1

\(\mapsto\)2 + 15.99

\(\mapsto\) 17.99u Ans.

Learn the Period table of Elements to solve this type of questions. It is very important. I attached the period table of elements. Learn it and you are able to solve it.

Answer:

you know that they will be a displacement reaction that will form a barium salt:

Ba(NO3)2+ 2NaCl--> BaCl2 + 2NaNO3

So now that we have that formula and the molecular weight we can determine how much salt will be made. So here we convert the grams to moles

(42.3g Ba(NO3)2)*(1 mole/261.34g) = 0.16185 mol

In the molecular formula we know that 1 mole of Barium nitrate will create 1 mole of Barium chloride, so in this case (in a perfect world) you should get 0.16185 mole of barium chloride (208.23 g/mol) that we then have to convert to grams.

(0.16185 mol BaCl2) * ( 208.23 g/mol) = 33.7037 g of Barium Chloride (rounded to 3 significant digits = 33.7g)

Answer: There are approximately 0.142 moles in 28 grams of Gold.

Explanation:

To calculate the number of moles 28 grams of Gold, we need to know the molar mass of gold. The molar mass of gold (Au) is approximately 197 grams per mole.

We can use the formula:

Number of moles = Mass (in grams)  / Molar mass

Substituting the given values:

Number of moles = 28 g / 197 g per mole

Number of moles ≈ 0.142 moles (approx.)

Therefore, there are approximately 0.142 moles of gold in 28 grams.

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Answer:

1.A a Chemical Reaction is a process that involves rearrangement of the molecular or ionic structure of a substance, as opposed to a change in physical form or a nuclear reaction.

1.A Chemical reactions involve breaking chemical bonds between reactant molecules (particles) and forming new bonds between atoms in product particles (molecules)

1A.Chemical bonding, any of the interactions that account for the association of atoms into molecules, ions, crystals, and other stable species that make up the familiar substances of the everyday world.

2a.A gas evolution reaction is a chemical reaction in which one of the end products is a gas such as oxygen or carbon dioxide. Gas evolution reactions may be carried out in a fume chamber when the gases produced are poisonous when inhaled or explosive.

2b.a color change is usually an indicator that a reaction is occurring

2c.Processes involved in changes of state include melting, freezing, sublimation, deposition, condensation, and evaporation

3A.When you increase the pressure, the molecules have less space in which they can move. That greater density of molecules increases the number of collisions

3B.As an object gets hot, its atoms and molecules vibrate. As they vibrate, they release energy in the form of light. ... In chemiluminescence, energy from a chemical reaction excites the electrons of a substance

3C. Catalysis is the process of increasing the rate of a chemical reaction by adding a substance known as a catalyst. Catalysts are not consumed in the reaction and remain unchanged after it.

3D.Most chemical reactions involve the breaking and formation of chemical bonds. It takes energy to break a chemical bond but energy is released when chemical bonds are formed. If more energy is released than consumed, then the chemical reaction evolves heat and is said to be exothermic. ... Most reactions are exothermic.

Answer:

d

Explanation:

yes