What is the concentration of hydronium ion in a 0.121 M HCl solution?
A) 1.0 M
B) < 0.121 M
C) 0.121 M
D) not enough information

Answer:

i think the answer is c because it says that is all they care

To determine ℰ° for the given voltaic cell, use the formula ℰ°(cell) = ℰ°(cathode) - ℰ°(anode). The resulting ℰ° for the voltaic cell is 0.71 V.

In order to determine the standard cell potential (ℰ°) for a voltaic cell using the provided half-reactions, we first identify the cathode and anode half-reactions. The cathode reaction is the reduction half-reaction with the more positive ℰ° value, while the anode reaction is the oxidation half-reaction with the less positive ℰ° value. In this case, Al3+ + 3e- → Al(s) with ℰ° = -1.66 V is the cathode, and Mg2+ + 2e- → Mg(s) with ℰ° = -2.37 V is the anode. Using the formula ℰ°(cell) = ℰ°(cathode) - ℰ°(anode), we get ℰ°(cell) = -1.66 V - (-2.37 V) = 0.71 V. Thus, the standard cell potential for this voltaic cell is 0.71 V.

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The number of moles of NaF that will be produced from 3moles of Na is 3 moles.

Stoichiometry is the study and calculation of quantitative (measurable) relationships of the reactants and products in chemical reactions (chemical equations).

According to this question, sodium reacts with fluorine as follows:

2Na+ F₂ → 2NaF

Based on the above equation, 2 moles of Na will produce 2 moles of NaF

This means that 3 moles of Na will produce 3 moles of NaF.

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The two types of nucleophilic substitution reactions are SN1 and SN2. SN2 has two molecules, whereas SN1 only has one.

A nucleophilic molecule replaces a different atom or group of atoms on a molecule, known as the leaving group, in a nucleophilic substitution reaction. The substrate molecule is attacked by the nucleophilic molecule's abundant electrons.

A process in which one functional group or atom is swapped out for another negatively charged functional group or atom is known as a nucleophilic substitution reaction.

The SN1 reaction is monomolecular, whereas the SN2 reaction is bimolecular.

Any substitution reaction in which an atom or functional group is changed for one that has a single pair of electrons, a negatively charged ion, or both. The negatively charged ion or the atoms/molecules with lone pairs of electrons will be pulled to the positively charged area of an atom or complex in an effort to replace the functional group or atom already attached to the positive location.

Therefore, The two types of nucleophilic substitution reactions are SN1 and SN2. SN2 has two molecules, whereas SN1 only has one.

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Answer:

1 ) They are wealthy in gases hydrogen and helium. 2 ) They are very hot and dense . 3 ) They have a solid gravitational pull.

Explanation:

Space where huge size of gaseous and dust cloud is present is called nebula. It is mainly made of hydrogen and helium. Nebula exist in the space which is between the stars and it is call as interstellar space.

Helix nebula is closest nebula which is near the earth. It’s distance from earth is about 700 light years.

Dark nebulae are very dense as well as cold. Nebula can be divided into dark nebula and bright nebula. The gas which is present between the stars is always combine with solid grains cosmic dust.

Nebulae contribute more to stellar creation than other areas of the universe for the following three reasons:

So, the correct options are A, D and E.

Huge clouds of gas and dust known as nebulae are found in space and are made up of heavier elements in the form of dust particles as well as ionized gases like hydrogen and helium.

Because the gases and dust within them have the potential to collapse under the influence of gravity and form new celestial objects, they are frequently the birthplace of stars and planetary systems. They are rich in hydrogen and helium. They have a strong gravitational pull and are hot and dense.

Hence, the correct options are A, D and E.

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Select all the correct answers. what are three reasons why nebulae contribute more to stellar formation than other regions of the universe?

Answer:

true I think ?38363849472

Answer:

true

Explanation:

Answer:

Why Dissolving Salt Is a Chemical Change

Therefore, dissolving salt in water is a chemical change. The reactant (sodium chloride, or NaCl) is different from the products (sodium cation and chlorine anion). Thus, any ionic compound that is soluble in water would experience a chemical change.

Explanation:

The first ionization energy of an atom depends on its electron configuration and effective nuclear charge. While neon, argon, and helium are in the same group, their electron configurations result in different ionization energies.

Helium has a fully filled 1s orbital, which means that the outermost electron is held tightly by the nucleus due to the high effective nuclear charge. As a result, helium has the highest first ionization energy among the noble gases.

Argon has a partially filled 3p orbital, which is farther away from the nucleus than the 1s orbital of helium. The effective nuclear charge experienced by the outermost electron in argon is therefore less than that of helium, making it easier to remove. This explains why argon has a lower first ionization energy than helium.

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Answer:

speed

Explanation:

hope it helps

keep smiling

Answer:

algabra

Explanation:

air

Based on the data provided,  the rate of the given reactions are:

a. reaction rate =  0.0132 M/sec

b. rate of change of [H⁺] = 8.8 * 10⁻³ M/sec

Reaction rate = change in concentration of reactant or product/ time taken

Change in concentration of I⁻ = 1.000 M - 0.868 M= 0.132

time taken = 10 s

reaction rate = 0.132/10

Rate of reaction = 0.0132 M/sec

From the equation of the reaction 3 moles of I⁻ are used up for every 2 moles of H⁺

Hence, the rate of change of [H⁺] = 0.0132 M/sec * 2/3

rate of change of [H⁺] = 8.8 * 10⁻³ M/sec

Therefore, the rate of the given reactions are:

a. reaction rate =  0.0132 M/sec

b. rate of change of [H⁺] = 8.8 * 10⁻³ M/sec

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Answer:

In a solid, they're really close together and vibrate a LITTLE, in a liquid they're kinda close together but change movement because water will change shape depending on the container they're in. For gas they are spread far from each other and vibrate A LOT

Explanation:

Answer:

0.1 L

Explanation:

M₁ × V₁ = M₂ × V₂

10M × V₁ = 1M × 1L

V₁ = 0.1 L

I hope this helps :)

The molar dilution can be used to estimate the molarity or the volume. 0.1 L of 10 M solution is required to make 1 M of solution.

A dilution factor of the molar concentration is used to calculate the molar concentration or the volume needed to make the diluted solution from the stock.

Given,

M₁ = 10 M

V₁ = ?

M₂ = 1 M

V₂ = 1 L

The volume is calculated as:

M₁ V₁ = M₂ V₂

10 V = 1 × 1

V = 1 ÷ 10

= 0.1 L

Therefore, 0.1 L of the 10 M solution is needed.

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The density of the liquid in the bottle will be 0.665 g/mL

Mathematically, density is given as:

Density = mass/volume

Mass of liquid = mass of bottle + liquid - mass of empty bottle

                       = 6.3 - 4.24 = 2.06 g

volume of liquid = 3.100 mL

Density of liquid = 2.06/3.100 = 0.665 g/mL

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Answer:t volume and amount of air

Explanation:According to Boyle's law, what is the relationship between pressure and volume? They are inversely related. As one increases, the other decreases

The following redox reaction is given below:

Zn + 2AgNO3 ⟶ 2Ag + Zn(NO3)2In the above redox reaction, the oxidation state of Zn changes from 0 to +2, while the oxidation state of Ag changes from +1 to 0.

Therefore, Zn loses 2 electrons and Ag gains 1 electron.2 moles of AgNO3 will consume 2 × 2 = 4 electrons, since each mole of AgNO3 consumes two electrons to reduce the two Ag+ ions.

The number of electrons transferred during the reaction is 2 × 1 = 2.

Thus, two electrons are transferred in the given redox reaction.

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Answer:

Conduct more trials

Explanation:

Theoretical Probability can be defined as what someone is expecting to happen

Experimental Probability on the other hand, is defined as what actually happens.

Probability is usually calculated in the same way for experimental probability and that of theoretical probability. You divide the total number of possible ways in which a particular outcome can happen, by the total number of outcomes itself.

In Experimental probability, the more times a probability is tried, it gets closer and even more closer to theoretical probability.

So, for the question, Jamie should improve the number of tries more, so as to get his experimental probability results to be closer to the theoretical probability result.

Answer:

A. He can increase the number of trials

Explanation:

Answer:B

Explanation:Because when the object heats up the particles move faster and it will turn into a liquid or gas but if it is being cooled then the particles will slow down and either make a liquid or solid.

d. CaSO4 is the correct way to write the formula of the compound formed between the calcium ion and the sulfate ion.

What is CaSO4?

CaSO4 is the chemical formula for calcium sulfate, which is a common compound used in various industries including construction, food, and medicine. It can exist in different forms, such as anhydrous calcium sulfate or hydrated calcium sulfate (gypsum).

What is an ion?

An ion is an atom or molecule that has an unequal number of protons and electrons, resulting in a net electrical charge. An ion with a positive charge is called a cation, while an ion with a negative charge is called an anion.

what is gypsum?

Gypsum is a soft sulfate mineral composed of calcium sulfate dihydrate (CaSO4·2H2O). It is commonly used in construction as a material for plaster and drywall.

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Explanation:

1)

2Fe+3Cl2 →2FeCl3

2)

CH4+2O2 → CO2 +2H2O

3)

SnO2+2H2 →2H2O +Sn

4)

2KOH + H2SO4 → K2SO4+2H2O

Answer:

A is solid

B is solid

C is liquid

D is a gas

The melting point is 15 degrees celcius

Its boiling point is 110 degree celcius

A,C and D are the portions showing the change in state

The balanced net reaction for the Sn (s) | SnCl2 (aq) || AlBr3 (aq) | Al (s) chemical cell is: 3Sn (s) + 2AlBr3 (aq) → 3SnBr2 (aq) + 2Al (s).

The given cell notation represents a redox reaction occurring in an electrochemical cell. The left half-cell consists of solid tin (Sn) in contact with an aqueous solution of tin(II) chloride (SnCl2). The right half-cell contains an aqueous solution of aluminum(III) bromide (AlBr3) and solid aluminum (Al).

To determine the balanced net reaction, we need to consider the transfer of electrons between the species involved. The oxidation half-reaction occurs at the anode, where tin (Sn) undergoes oxidation and loses electrons:

Sn (s) → Sn2+ (aq) + 2e-

The reduction half-reaction takes place at the cathode, where aluminum(III) bromide (AlBr3) is reduced and gains electrons:

2Al3+ (aq) + 6Br- (aq) → 2Al (s) + 3Br2 (aq) + 6e-

To balance the overall reaction, we need to multiply the oxidation half-reaction by 3 and the reduction half-reaction by 2 to ensure that the number of electrons transferred is equal:

3Sn (s) → 3Sn2+ (aq) + 6e-

4Al3+ (aq) + 12Br- (aq) → 4Al (s) + 6Br2 (aq) + 12e-

By adding the balanced half-reactions together, we obtain the balanced net reaction for the cell:

3Sn (s) + 2AlBr3 (aq) → 3SnBr2 (aq) + 2Al (s)

To determine the cell potential, additional information such as the standard reduction potentials of the species and the Nernst equation would be required. Without this information, it is not possible to calculate the cell potential accurately.

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Answer:

To be a mineral a substance must meet five requirements:

1 .naturally occurring (not made by humans)

2.inorganic (not produced by an organism)

3.solid

4.a limited range of chemical compositions

5.ordered atomic structure

Explanation:

Explanation:

The symbol P represents the element phosphorus, which has an atomic number of 15, indicating that it has 15 protons in the nucleus. The ion is negatively charged with a 3- charge, which means it has three more electrons than protons.

To find the number of neutrons in an atom or ion, you need to know its mass number, which is the sum of protons and neutrons. Since the charge of the ion is not related to its mass, we can assume that the mass number is the same as that of the neutral phosphorus atom, which is approximately 31.

So, the number of protons, neutrons, and electrons in the P3- ion is:

Protons: 15

Neutrons: 31 - 15 = 16

Electrons: 15 + 3 = 18

Therefore, the P3- ion has 15 protons, 16 neutrons, and 18 electrons.

Answer:

,

Explanation:

The earth system process from slowest to fastest is that Contact of Indian tectonic plate with Eurasian plate; uplift of the Tibetan Plateau; formation of the Gobi Desert; yearly monsoon wind cycle.

 The Equation to show the reaction are -

\(2Na(s)\rightarrow2Na^{+}+2e^{-}\)

\(Cl_{2}(g) +2e^{-} \rightarrow2Cl^{-}\)

A chemical equation is said to be balanced when the quantity of each type of atom in the reaction is the same on both the reactant and .

The balanced chemical reaction is

\(2Na(s)+Cl_{2} \rightarrow2NaCl(s)\)

Before reaction the sodium atom has zero oxidation state and after reacting with chlorine the oxidation state of sodium become +1 i.e., it is oxidised

Which gives the following reaction

\(2Na(s)\rightarrow2Na^{+}+2e^{-}\)

Similarly,before reacting with sodium the oxidation number of chlorine is zero and after reacting it is reduced to -1 oxidation state.

Which gives the following chemical reaction

\(Cl_{2}(g) +2e^{-} \rightarrow2Cl^{-}\)

From the combination of these reaction the main balance reaction is formed.

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