How many grams of H2 must react to produce of 75.0 g of ph3? 2P + 3H2 —> 2 PH3

Answer:

because battery have it's own voltage in it's composition

Answer:

c: The equilibrium position will shift away from what was added to lower its concentration.

Explanation:

Answer: C. The equilibrium position will shift away from what was added to lower its concentration.

Explanation:

If we have a system that is already in equilibrium, the addition of an extra amount of one of the reactants or one of the products throws the system out of equilibrium. Either the forward or the reverse reaction will then occur to restore equilibrium conditions.

Answer: fluted filter paper has more surface area suitable for collecting solid

Explanation:

The law of conservation of  mass is obeyed by a balanced chemical equation. The number of moles of KCl produced from 4K is 4KCl.

An equation in which the amount of the reactants and products on both sides of the reaction are equal is defined as the balanced chemical equation. In a balanced equation the number of atoms of each element is same on both sides.

According to the law of conservation of mass, mass can neither be created nor be destroyed. All the balanced chemical equation satisfies this law.

Here when 4K is used the amount of KCl produced is given as:

4K + 2Cl₂ → 4KCl

Here there are 4 'K' atoms and 4 'Cl' atoms. Hence the number of the respective atoms are equal on both sides of the equation.

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Answer:

P₂ = 300 atm

Explanation:

Given that,

Initial volume, V₁ = 600 L

Initial pressure, P₁ = 400 atm

We need to find the pressure if the volume is 800 L.

We know that the relation between pressure and volume is given by :

\(P\propto \dfrac{1}{V}\\\\\dfrac{P_1}{P_2}=\dfrac{V_2}{V_1}\\\\P_2=\dfrac{P_1V_1}{V_2}\\\\P_2=\dfrac{600\times 400}{800}\\\\P_2=300\ atm\)

So, the new pressure is equal to 300 atm.

Transferring electrons from one species to another is a key component of redox reactions. A shift in oxidation number is the outcome of this. Working with metals may cause both electrodes to alter mass. The electrolytic solution's anions serve as a conduit for the passage of metallic ions to the cathode. The gas evolved from non-metals (gases) is gathered in a container. As a result, the mass of the negative electrode may fluctuate.

Based on the idea that metals precipitate out in their elemental form on solid electrodes when potential or electricity is imparted to them, electrochemical procedures extract and recover heavy metals. When there is an electron flow across the circuit from the anode, the fundamental reaction taking place is the reduction of metals in various oxidation states into a zero oxidation state (elemental state of metal) at the cathode (Nancharaiah et al., 2015). Based on how they work, these reductions can be divided into three categories: electrodeposition, electroflotation, and electrocoagulation. In EC, coagulating ions are released from the electrodes and react with the metals. These coagulates can then be sorted using centrifugation (Chen, 2004).

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Answer:

C is the correct answer 35% and 9%

The mass of aluminum that will combine with 16.5 g of oxygen is 75.64 g.  

The mass of aluminum that will combine with 16.5 g of oxygen, we need to first convert the mass of oxygen from grams to moles, since the reaction will occur at a fixed temperature and pressure.

1 mole of oxygen contains \(6.022 * 10^{23\) atoms, so 16.5 g of oxygen contains:

16.5 g /  \(6.022 * 10^{23\) atoms/mole = 0.00027 moles of oxygen

Next, we need to convert the number of moles of oxygen to moles of aluminum. The equation for the reaction is:

\(Al_2O_3 + 3O_2 - > 2Al_2O_3\)

Since we are combining 1 mole of oxygen with 3 moles of aluminum oxide, we can write the equation as:

\(16.5 g (O_2) + 3 x 0.00027 mol Al_2O_3 == 2 * 0.00027 (mol) Al_2O_3\)

We can now solve for the mass of aluminum by dividing both sides of the equation by 2 and multiplying by the molar mass of aluminum oxide (44.01 g/mol):

mass of aluminum = (16.5 g O2 x 44.01 g/mol) / (2 x 0.00027 mol)

mass of aluminum = 75.64 g

Therefore, the mass of aluminum that will combine with 16.5 g of oxygen is 75.64 g.  

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Answer:

so i think mass of water is 235 ml

C = m V . The unit of concentration is typically given as g/mL because the solute mass is frequently given in grammes and the volume is frequently given in milliliters. However, there are a tone of other mass and volume unit combinations that are possible.

Given that a solution consists of both a solute and a solvent, its total volume is equal to the sum of the volumes of both the solute and the solvent it contains.

A solution's concentration is an indicator of how much solute has dissolved in a specific volume of solvent or solution. When there is a significant amount of dissolved solute in a solution, it is said to be concentrated. When a dissolved solute is present in a solution, it is said to be diluted.

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The maximum concentration of Ca²⁺(aq) which can be present in drinking water without lowering the concentration of the F⁻(aq) below the ideal level will be closest to 0.025 M. Option B is correct.

To solve this problem, we can use the concept of the equilibrium constant (Kp) and the stoichiometry of the reaction.

The given equilibrium reaction is;

CaF(s) ⇌ Ca²⁺(aq) + 2F⁻(aq)

The equilibrium constant expression for this reaction is:

Kp = [Ca²⁺][F⁻]²

We are given the equilibrium constant (Kp) as 4.0 x 10⁻¹¹ and the concentration of F-(aq) as 4.0 x \(10^{(-M)}\). We need to determine the maximum concentration of Ca²⁺(aq) that can be present without lowering the concentration of F⁻(aq) below the ideal level.

Let's assume the maximum concentration of Ca²⁺(aq) as x M. Since the stoichiometry of the reaction is 1:2, the concentration of F⁻(aq) will be twice the concentration of Ca²⁺(aq).

Thus, the concentration of F⁻(aq) would be 2x M.

Now, substitute the concentrations into the equilibrium constant expression:

Kp = (x)(2x)²

4.0 x 10⁻¹¹ = 4x³

Rearrange the equation;

x³ = (4.0 x 10⁻¹¹) / 4

x³ = 1.0 x 10⁻¹¹

Take the cube root of both sides:

x ≈ 0.025

Therefore, the maximum concentration of calcium ions will be 0.025.

Hence, B. is the correct option.

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Brainly is erroneously blocking my answer from being posted due to nonexistent profanity and/or links, so I have attached an image of my written response. Please let me know if you have any problems seeing it.

The new concentration of the barium chloride solution, after diluting 78.4 mL of a 0.85 M solution to a final volume of 350 mL, is 0.19 M.

To calculate the new concentration, we can use the equation C₁V₁ = C₂V₂, where C₁ and V₁ are the initial concentration and volume, and C₂ and V₂ are the final concentration and volume. Given that C₁ = 0.85 M and V₁ = 78.4 mL, and V₂ = 350 mL, we can solve for C₂.

Rearranging the equation, we get C₂ = (C₁ × V₁) / V₂ = (0.85 M × 78.4 mL) / 350 mL ≈ 0.19 M. Therefore, the new concentration of the barium chloride solution, after diluting 78.4 mL of a 0.85 M solution to a final volume of 350 mL, is approximately 0.19 M.

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The first ionization energy of lithium (Li) corresponds to the reaction where a lithium atom loses one electron to become a lithium ion. The chemical equation for this reaction is:

Li(s) → Li⁺(g) + e⁻

In the case of lithium, the first ionization energy refers to the energy required to remove one electron from a neutral lithium atom to form a lithium ion with a positive charge.

The equation for the first ionization energy of lithium shows that a lithium atom in its solid state loses an electron to form a positively charged lithium ion in the gaseous state. This process requires energy to overcome the attractive forces holding the electron in the atom.

The first ionization energy is an important property of elements and is a measure of their tendency to lose electrons.

Elements with high first ionization energies are less likely to lose electrons and form positive ions, whereas elements with low first ionization energies are more likely to lose electrons and form positive ions.

In the case of lithium, it has a relatively low first ionization energy compared to other elements, which means it is relatively easy for a lithium atom to lose an electron and form a positively charged ion.

This property makes lithium a good candidate for use in batteries and other energy storage devices.

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Answer:

the property of air shown in the figure describe A.mass

Answer:

In First compound the longest chain contains 7 C atoms.

In the Second compound the longest chain contains 9 C atoms.

In the Third compound the longest chin contains 7C atoms.

Explanation:

In first compound the longest chain contains 7 carbon atoms.In the second compound the longest chain contains 9 carbon atoms.In the third compound the longest chin contains 7 carbon atoms.

An atom is defined as the smallest unit of matter which forms an element. Every form of matter whether solid,liquid , gas consists of atoms . Each atom has a nucleus which is composed of protons and neutrons and shells in which the electrons revolve.

The protons are positively charged and neutrons are neutral and hence the nucleus is positively charged. The electrons which revolve around the nucleus are negatively charged and hence the atom as a whole is neutral and stable due to presence of oppositely charged particles.

Atoms of the same element are similar as they have number of sub- atomic particles which on combination do not alter the chemical properties of the substances.

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Answer:

Na2SO4 is equal to 0.0070401642780093 mole.

Explanation:

Answer:

1 cl =10 ml

so

4.22cL= 4.22×10= 42.2 mL

Considering the two acids and bases involved, the reverse reaction is favored.

The term reversible reaction refers to a reaction that can go either forward or backwards depending on the conditions of the reaction.

We must recall that acetic acid is a weak acid hence the equilibrium position would always lie towards the left hand side of the equation. Hence considering the two acids and bases involved, the reverse reaction is favored.

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Answer:

HBr

Explanation:

Acids have Hydrogen as their first/leading element.

Answer:

Radioactive elements

Stable

Explanation:

Radioactive elements that have a longer half-life are more stable than those that a shorter half-life.

Half-life is the time taken for half of a radioactive element to decay by half of its original composition.

Now, if a substance have a long half-life, it is more stable and takes time to break down. For atoms with a short life, they are highly unstable and breaks down readily and easily.

Answer: 2.48×10^-17 J

Explanation:

Given the following :

Wavelength = 8nm (8 x 10^-9 m)

Energy(e) of X-ray =?

Energy=[speed of light(c) × planck's constant (h)] ÷ wavelength

Speed of light = 3×10^8m/s

Planck's constant = 6.626×10^-34 Js

Wavelength = 8 x 10^-9 m

Energy = [(3×10^8) * (6.626×10^-34)] / 8 x 10^-9

Energy = [19.878×10^(8-34)] / 8 x 10^-9

Energy = 2.48475 × 10^(-26+9)

Energy = 2.48×10^-17 J

Answer: 2.48×10^-17 J

Explanation: a pex

which compound has the highest magnetic moment

c) plot ln [x] versus time and determine the magnitude of the slope.

What is a rate constant?

The rate and direction of a chemical reaction are quantified in chemical kinetics by the reaction rate constant, or reaction rate coefficient, k. 

For reactants A and B to combine to generate the product C

a A + b B → c C

The reaction rate frequently takes the following form:

\(r=k(T)[A]^{m} [B]^{n}\)

Here, [A] and [B] are the molar concentrations of substances A and B in moles per unit volume of solution, assuming the reaction is occurring throughout the volume of the solution, and k(T) is the reaction rate constant that varies on temperature.

Check the attached file for the graph.

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Check the attached file for the graph

Answer:

A. Supersaturated

Explanation:

i got it right on edge 2021

The heated solution that holds more dissolved solution than it can hold at a lower temperature is supersaturated solution. Therefore, option A is correct.

A solution that contains more solvent than the typical amount that can dissolve at a specific temperature is said to be supersaturated. By introducing a tiny solute crystal known as a seed crystal, the excess dissolved solvent in a super-saturated solution can begin to recrystallize.

A solution that contains more solvent than the typical amount that can dissolve at a specific temperature is said to be supersaturated. A solution is considered supersaturated if it contains more solute than is necessary to saturate it.

A solution that contains more solute than it can hold at a specific temperature is said to be supersaturated. Usually, raising a solution's temperature causes more particles to dissolve, increasing the solute concentration.

Thus, option A is correct.

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When diluting an acid, it is recommended to add the acid to water and not the other way around (adding water to acid). This is because the process of mixing an acid with water can release a significant amount of heat, and adding water to concentrated acid can lead to vigorous and potentially dangerous reactions.

Here are a few reasons why it is safer to add acid to water:

Heat Dissipation: The dilution of strong acids is an exothermic process, which means it releases heat. By adding the acid slowly to water while stirring, the heat generated can be dissipated more effectively. On the other hand, if water is added to concentrated acid, there is a risk of localized heating and potential splattering due to rapid boiling or splashing of the hot acid.

Spattering and Splashing: When water is added to concentrated acid, there is a higher likelihood of spattering and splashing of the acid, which can cause burns or injuries. Adding acid to water allows for better control and minimizes the chances of violent reactions or sudden release of energy.

Dilution Gradually: By adding acid to water, you can gradually increase the volume and concentration, ensuring better mixing and distribution of the acid in the water. This helps prevent localized high concentrations of acid that could lead to rapid reactions.

Acidic Fumes and Aerosols: Concentrated acids often release fumes and aerosols that can be hazardous to inhale. By adding acid to water, any released fumes or aerosols are more likely to be contained within the larger volume of the solution, reducing the risk of exposure.

It's important to follow proper safety protocols, wear appropriate protective equipment (such as gloves and goggles), work in a well-ventilated area, and consult specific guidelines or procedures provided by chemical manufacturers or regulatory agencies when handling and diluting acids.

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They are called Periods. Lesser known as series