What element on the periodic table is named after the european capital where it was discovered in 1923?

The products that complete the reaction between hydrochloric acid (HCl) and sodium hydroxide (NaOH) are water (H₂O) and sodium chloride (NaCl).

In the given chemical equation, HCl + NaOH, hydrochloric acid (HCl) reacts with sodium hydroxide (NaOH) to produce water (H₂O) and sodium chloride (NaCl). This reaction is a classic example of an acid-base neutralization reaction. The hydrogen ion (H⁺) from the acid combines with the hydroxide ion (OH⁻) from the base to form water, and the remaining ions, sodium (Na⁺) from the base and chloride (Cl⁻) from the acid, combine to form sodium chloride.

The balanced chemical equation for this reaction is:

HCl + NaOH → H₂O + NaCl

This equation illustrates the conservation of mass, with the same number of atoms of each element on both sides of the equation. The coefficients in the balanced equation indicate the stoichiometry of the reaction, showing the molar ratios between the reactants and products. In this case, one mole of hydrochloric acid reacts with one mole of sodium hydroxide to produce one mole of water and one mole of sodium chloride.

It's important to note that in a balanced chemical equation, the number of atoms of each element must be the same on both sides. This ensures that the law of conservation of mass is satisfied, meaning that no atoms are created or destroyed during the chemical reaction. In the case of the reaction between HCl and NaOH, the balanced equation accurately represents the chemical changes that occur during the neutralization process.

Choose the products that complete the reaction. The chemical equations may not be balanced. HCL + NaOH →?

Answer:

A. grams of product produced in an hour

Explanation:

Answer:

89.6 L.

Explanation:

CS₂ + 3O₂ → CO₂ + 2SO₂.

Using cross multiplication:

1.0 mole of CS₂ produces → 2.0 moles of SO₂.

2.0 mole of CS₂ produces → ??? moles of SO₂.

∴ The no. of moles of SO₂ produced = (2.0 mol)(2.0 mol)/(1.0 mol) = 4.0 mol.

∴ 4.0 moles of SO₂ occupy = (4.0)(22.4 L) = 89.6 L.

Answer:

89.6 L.

Explanation:

The molecule C3H6 is classified as a Alkene.

The answer is alkene

Answer:

The answer is boiling point.

Explanation:

The boiling point of a substance refers to the temperature at which the vapour pressure of a liquid equals the atmospheric pressure; at this point the liquid will boil. Different liquids have different boiling points that are unique to them. This makes it possible for scientists to use boiling points as one of the criteria by which a liquid substance can be identified. At boiling point, the chemical bonds that are holding liquid particles together are destroyed and the liquid turn to gas.

Answer:

Alkene

Explanation:

Answer:

An oxidizing agent, or oxidant, gains electrons and is reduced in a chemical reaction. ... A reducing agent is oxidized, because it loses electrons in the redox reaction.

Explanation:

An oxidizing agent, or oxidant, gains electrons and is reduced in a chemical reaction. ... A reducing agent is oxidized, because it loses electrons in the redox reaction.

Answer:

[tex]\boxed{-267.5}[/tex]

Explanation:

You can calculate the entropy change of a reaction by using the standard molar entropies of reactants and products.

The formula is

[tex]\Delta_{r} S^{\circ} = \sum_n {nS_{\text{products}}^{\circ} - \sum_{m} {mS_{\text{reactants}}^{\circ}}}[/tex]

The equation for the reaction is

                        C₂H₄(g) + 3O₂(g) ⟶ 2CO₂(g) + 2H₂O(ℓ)

ΔS°/J·K⁻¹mol⁻¹   219.5      205.0         213.6         69.9

[tex]\Delta_{r} S^{\circ} = (2\times213.6 + 2\times69.9) - (1\times219.5 + 3\times205.0)\\\\= 567.0 - 834.5 = \boxed{-267.5 \text{ J}\cdot\text{K}^{-1} \text{mol}^{-1}}[/tex]

The value of ΔS for the given reaction is –267.5 J/Kmol

The value of ΔS for the reaction given above can be calculated by using the standard entropies of the reactants and products.

The standard entropies for each compounds are given below:

Thus, we can obtain the change in the entropy, ΔS for the reaction as illustrated below:

C₂H₄ + 3O₂ —> 2CO₂ + 2H₂O

Change in entropy = entropy of product – entropy of reactant

ΔS = ΔSₚ – ΔSᵣ

ΔS = [(2×213.6) + (2×69.9)] – [(1×219.5) + (3×205)]

ΔS = [427.2 + 139.8] – [219.5 + 615]

ΔS = 567 – 834.5

ΔS = –267.5 J/Kmol

Learn more about entropy:

https://brainly.com/question/14116951

Answer: C

Explanation:

Non-foliated metamorphic rocks such as hornfels, marble, quartzite, and novaculite do not have a layered or banded appearance.

Slate is a kind of nonfoliated metamorphic rock. Option D is correct.

Foliated metamorphic rocks have a layered appearance, while nonfoliated metamorphic rocks do not. Slate is a type of nonfoliated metamorphic rock that is formed when shale is subjected to high pressure and heat. Shale is a sedimentary rock that is made up of fine-grained particles of clay and silt.

When shale is subjected to high pressure and heat, the particles in the shale are recrystallized and aligned in parallel layers. This gives slate its characteristic smooth, even texture. Slate is often used for roofing, blackboards, and flooring. It is also a popular material for sculptures and other decorative items. Option D is correct.

To know more about the Limestone, here

https://brainly.com/question/5559636

#SPJ6

Answer:

the answer is d hope this helps

and dont forget to mark me as brainliest

Explanation:

Trans-2-pentene is the name of the opposite stereoisomer of the molecule shown in the figure. Hence, option A is correct.

Stereoisomers are isomers that have the same composition but that differ in the orientation of those parts in space.

When two or more compounds differ in the position of substituent atom or functional group on the carbon skeleton, they are called position isomers and this phenomenon is termed as position isomerism.

Pent-2-ene and pent-l-ene are position isomers because differ in the position of double bond.

The two stereoisomers are (Z)-pent-2-ene and (E)-pent-2-ene.

Hence, option A is correct.

Learn more about the stereoisomer here:

https://brainly.com/question/16986110

#SPJ2

Answer:

Cannot form hydrogen bonds to its neighbours.

Explanation:

The strongest intermolecular forces in H₂CO are dipole-dipole attractions between the polar C=O bonds in nearby molecules.

The strongest intermolecular forces in CH₃OH are strong hydrogen bonding attractions between the O-H group in one molecule and the O atom in a nearby molecule.

Since H₂CO molecules have weaker intermolecular forces than methanol, more of them can escape from the liquid to the vapour phase.

Thus, CH₂O has a higher vapour pressure than methanol.

Formaldehyde (H2CO) has a higher vapor pressure than methanol (CH3OH) due to weaker intermolecular forces, as methanol can form stronger hydrogen bonds which formaldehyde cannot, leading to a lower vapor pressure for methanol.

The main reason why H2CO (formaldehyde) has a higher vapor pressure at a given temperature compared to CH3OH (methanol) is because of the different types of intermolecular forces (IMFs) present in each compound. Methanol can form hydrogen bonds due to its -OH group, which are much stronger than the dipole-dipole interactions and London dispersion forces present in formaldehyde.

Despite methanol and formaldehyde having similar molar masses, the stronger hydrogen bonding in methanol means that more energy is needed to escape from the liquid phase, resulting in a lower vapor pressure for methanol compared to formaldehyde.

Answer:

(2) Fe(s) + S(s) → FeS(s)

Explanation:

(2) Fe(s) + S(s) → FeS(s).

Fe is oxidized to Fe²⁺ in (FeS) (loses 2 electrons). "reducing agent".

S is reduced to S²⁻ in (FeS) (gains 2 electrons). "oxidizing agent".

The first reaction: (1) Ba(NO3)2 + Na2SO4 ==> BaSO4 + 2NaNO3

is replacement reaction.

The third reaction: (3) H3PO4 + 3KOH==> K3PO4 + 3H2O

is acid-base reaction.

The fourth reaction: (4) NH3(g) + HCl(g)==> NH4Cl(s)

is synthesis reaction.

The balanced chemical equation which represents a redox reaction is:[tex]Fe_(_s_)+S_(_s_) \rightarrow FeS_(_s_)[/tex] as it includes an oxidant and a reductant. The correct option is 3.

Redox reactions comprise of two parts a reduced part and an oxidized part, which occur simultaneously . The part which is reduced gain electrons and hence there is a increase in oxidation state of the species.

While, the part which is oxidized looses electrons and hence there is a decrease in oxidation state of the species.During redox reactions, there is no net change in the number of electrons . Electrons which are given off in oxidation are used up in reduction.

The ion or molecule which accepts electrons is called as oxidizing agent while the ion or molecule which donates electrons is called as a reducing agent.The only reaction which is an oxidation-reduction reaction is that of iron and sulfur where iron is oxidized and sulfur is reduced.

Thus, the correct option is 3.

Learn more about redox reactions,here:

https://brainly.com/question/28300253

#SPJ6

Answer:

84 Joules are wasted per second.

Explanation:

An efficiency of 16% means 84% is wasted as heat energy.  

Therefore;

For a 100W bulb;

Heat wasted = 84/100 × 100 W

                      = 84 W

Therefore;

84 W or 84 joules are wasted as heat per second

Answer:

Lets the total pressure is Pt and the individual gases are designated as pH2, pCO2, pNe, pO2.

Pt =  pCO2+ pNe+pO2+ pH2

285KPa = 13 KPa+ 14 KPa + 157 KPa +pH2

Now add the partial pressure of CO2, Ne and O2 which is equal to 184 KPa.

285 KPa = 184 KPa + pH2  

Now subtract the individual pressure of each gas from thje total pressure.

285 KPa - 184 KPa = pH2

                101 KPa = pH2

The partial pressure of hydrogen is  101 KPa.

Answer:

[tex]\boxed{\text{(C)}}[/tex]

Explanation:

The solid consists of positive and negative ions, so it is an ionic solid.

Ionic solids are brittle, usually water-soluble, and poor thermal conductors as solids. Thus, the correct answer is [tex]\boxed{\textbf{(C)}}[/tex].

(A) is wrong. It describes a covalent solid, which is soft and always a poor conductor.

(B) is wrong. It describes a covalent solid, which is also low-melting.

(D) is wrong. It describes a metal, and a metal does not contain negative ions.

Answer: A. fossil

B. rock layer

Explanation:

Relative aging or dating can be define as the technique for determination of the age of the rock and fossil. It is a method of determining the chronological order of the past events by comparing the stratigraphic column of rocks and sediments with each other. This method can only give relative age of one object in comparison with the other but does not give the absolute date.  

Answer:

Explanation:

Interesting way to teach molarity. Count the number of Black dots in Vessel 1. There are 4.  There are also 4 clear dots. The number Ks = Cls

The molarity is 4 units of KCl/volume of vessel 1.

Now look at vessel 2. All you need do is count the black dots. There are fewer of them

There are 8 by my count. The volume hasn't changed but the black dots have doubled. That means there are 8 units of CaCl2 / volume of Vessel 2 (which is the same volume as Vessel one.)

The answer cannot be anything but D.

Before you count the clear dots in vessel two, make a guess of how many there should be. Notice the formula for CaCl2 has a two in it. Make your best guess and count away.

Answer:

matter

Explanation:

Iron marks the boundary between fusion and fission for energy release. Lighter elements than iron release energy through fusion, while heavier elements release energy through fission. Iron has the highest binding energy per nucleon, making it a turning point on the energy-mass curve.

The element that marks the boundary between using fusion and fission to release energy is iron (Fe). In the context of nuclear reactions, fusion occurs when two light nuclei combine to form a heavier nucleus, releasing energy because the combined nucleus has a higher binding energy per nucleon.

In contrast, fission is the process of splitting a heavy nucleus into smaller nuclei, releasing energy because the products have a higher binding energy per nucleon than the original heavy nucleus.

Iron possesses the highest binding energy per nucleon, which is why it is an energy-increasing process to fuse nuclei lighter than iron. For elements heavier than iron, fission becomes an energy-releasing process. Thus, iron is a unique marker in the periodic table where the more energy-efficient method of releasing nuclear energy switches from fusion to fission.

Fusion is responsible for powering stars and for the creation of elements in the universe through a process known as nucleosynthesis. Furthermore, while fission has been utilized in nuclear weapons and reactors, fusion promises to release far more energy per reaction, making it an attractive but technically challenging energy source. On an energy-mass curve, nuclei to the left of iron release energy through fusion while those to the right produce energy through fission.

A reaction, such as this one, starts with a reactant. It needs to have activation energy in order to change to the product, as shown by the hump in the graph. At the top of the hump is the transition state. This is the point where, after enough energy, the reactant will turn into the product. This reaction is exothermic. Since the product has less energy than the reactant, it had to have released energy somehow, and that energy was released in the form of heat, which makes it exothermic. (Exothermic reactions release heat, vs. endothermic reactions which absorb heat).

Bonus: a catalyst can be used to lower the activation energy by giving the reaction a “kick start,” requiring less energy in the reaction for the reactant to turn into the product.

-Lemme know if I can do anything else!

Answer:

Here's what I get.

Explanation:

An acid is a proton donor; a base is a proton acceptor.

Thus, HF is the acid and H₂O is the base.

The conjugate base is what's left after the acid has given up its proton.

The conjugate acid is what's formed when the base has accepted a proton.

HF/F⁻ make one conjugate acid/base pair, and H₂O/H₃O⁺ are the other conjugate acid/base pair.

[tex]\rm \underbrace{\hbox{HF}}_{\hbox{acid}} + \underbrace{\hbox{H_{2}\rm O}}_{\hbox{base}} \rightleftharpoons \underbrace{\hbox{H_{3}\rm O^{+}}}_{\hbox{conj. acid}} +\underbrace{\hbox{F^{-}}}_{\hbox{conj. base}}[/tex]

Answer:

Its acidic.. With pH=3

Explanation:

pH + pOH =14

Let pH be x then

x + 11 = 14

x = 3

pH less than 7, solution is acidic.

The solution with a pOH of 11 will be acidic in nature.

When the aqueous solution is dissociated based upon the ions released by them it is categorized as acids or bases. When the solution gives out [tex]H^+[/tex] ion it is called as acid, whereas if it gives out [tex]OH^-[/tex] ions it is called as bases.

The concentration of [tex]H^+[/tex] ions is represented by pH, whereas the concentration of [tex]OH^-[/tex] ion is represented by pOH. In pOH scale value seven refers to neutral, whereas value below seven shows that the substance is basic whereas the value above seven indicates the substance as acidic.

Thus, it can be inferred that the solution with a pOH of 11 will be acidic in nature.

Answer:

The definition of physical science is the sciences concerned with the study of inanimate natural objects, including physics, chemistry, astronomy, and related subjects.

Explanation:

Answer:

The branch of science which involves the studying of the non-living systems is known as physical science.

Explanation:

The branch of science which involves the studying of the non-living systems is known as physical science.

The further classification of physical science is:-

It is different from life science which involves the study of the living things. Physical science helps to study various phenomenon occurring in our day to day lives.

It has to do with time travel

Final answer:

Quantum physics is a branch of physics focusing on the behavior of matter and energy at atomic and subatomic levels, defining energy, momentum, and other quantities in discrete values. It introduces the wave-particle duality of quantum particles and quantization, where energy is exchanged in fixed quanta.

Explanation:

Introduction to Quantum Physics:

Quantum physics, also known as quantum mechanics, is a fundamental theory in physics that explains the behavior of matter and energy at the atomic and subatomic levels. Unlike classical physics, which adequately describes the motion of macroscopic objects, quantum physics is essential for understanding phenomena that occur at extremely small scales where wave-particle duality and quantization become significant. The quantization aspect of quantum mechanics means that energy, momentum, and other quantities of a system can only take on discrete values.

It's this branch of physics that reveals the dual nature of particles, such as electrons, acting both as particles and as waves. This duality is one of the many counterintuitive aspects of quantum mechanics that do not align with everyday experiences and observations. In the world of quantum mechanics, particles gain or lose energy in fixed amounts called quanta. The field also delves into the strange properties and behaviors of quantum entities, predicting probabilities rather than certainties.

Understanding quantum mechanics is crucial for a variety of applications, including the study of atoms, construction of lasers, and the development of quantum computers. It's a field that continues to challenge our perceptions of reality and pushes the boundaries of what we consider possible in the physical world.

The answer is nucleic acids

There are the names of more than 58,000 men and women who gave their lives or remain missing.

Answer:

2H₂ + O₂ → 2H₂O.

Explanation:

2H₂ + O₂ → 2H₂O.

So, every 2.0 moles of H₂ react with 1.0 mole of O₂ to produce 2.0 moles of H₂O.

The balanced equation of the reaction is:

[tex]\underline{2}H_2\ +\ \underline{1}O_2\ \rightarrow \underline{2}H_2O\\[/tex]

A balanced equation must have equal numbers of moles of the various element on both sides of the equation.

Now, lets us analyze the given equation. This is show below:

[tex]\_H_2\ +\ \_O_2\ \rightarrow \_H_2O\\[/tex]

Reactants:

Products:

From the above, it is obviously clear that the equation is not balanced.

Therefore, the equation can be balanced by writing 2 before hydrogen gas, H₂ and 2 before water, H₂O as shown below:

[tex]\underline{2}H_2\ +\ \underline{1}O_2\ \rightarrow \underline{2}H_2O\\[/tex]

Now, we can say that the equation is balanced.

Learn more about balancing equation:

https://brainly.com/question/12192253

#SPJ3

Answer:

No, it is not balanced.

The balanced equation is: Zn(OH)₂ + 2NaOH → Na₂ZnO₂ + 2H₂O.

Explanation:

The no. of Na atoms in reactants side is 1 but in products side is 2.

The no. of H atoms in reactants side is 3 but in product side is 2.

So, the equation is not balanced.

Zn(OH)₂ + 2NaOH → Na₂ZnO₂ + 2H₂O.

Zn (1), O (4), H (4), and Na (2).

Final answer:

The chemical equation Zn(OH)2 + NaOH ⇒ Na₂ZnO₂ + H₂O is not balanced because there is a discrepancy in the number of oxygen atoms on each side of the equation.

Explanation:

The question asks to verify if the chemical equation Zn(OH)₂ + NaOH ⇒ Na₂ZnO₂ + H₂O is balanced. To determine if the equation is balanced, we count the atoms of each element on both sides of the equation. A balanced chemical equation has an equal number of each type of atom on both sides. For this equation, we see on the left side there is one zinc atom, two sodium atoms, four oxygen atoms, and two hydrogen atoms. On the right side, there is one zinc atom, two sodium atoms, three oxygen atoms, and two hydrogen atoms. Since there are different numbers of oxygen atoms on each side, the equation is not balanced.

Answer: Option A

Explanation: 2 Na + Cl2---> 2NaCl

Here Oxidation no of Na is zero while in NaCl is +1. That means oxidation state of Na increased from 0 to +1 hence oxidation

While Cl2 has zero in molecular form and -1 in NaCl hence Reduction (Oxidation no decreased from zero to -1)

Halogens(cl) always shows -1 oxidation state and IA group elements(Na)shows +1 oxidation state

Answer:

the nucleus of the atom was centrally located i n the atom and was positively charged

Explanation:t

Answer:

the nucleus of the atom was centrally located in the atom and was positively charged

Explanation:

Electrons orbit outside the nucleus. Option A is incorrect.

Nucleus is positive in charge and is located at the center of the atom. Option B is correct.

The nucleus is positively  charged and that the electrons are negatively charged. Option C is incorrect.

Electrons do affect the properties of atoms. Option D is incorrect.

Answer:

Explanation:

That would be the redox reactions . Such reactions only occur when you have a two half cells ,one of the half cells called anode carry oxidation reaction ( the losing of electrons ) and these electrons are then transferred up to the other half cell called cathode where reduction happens (gain of electrons ). Electrons from the anode are transferred up to the cathode and are reduced