Which element will reduce Mg2+ to Mg?
a) Fe b) Ba c) Pb d) Ag

Answer:

1. Mg+Hcl--》Mgcl2 + H2

Answer:

Its actually true

Explanation:

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Answer:

The correct answer is "True".

Explanation:

I hope this helps!

Answer:

2 C3H6 + 9 O2  6 H2O + 6 CO2

Theo. yield is 440.0 g CO2, % yield = 45.45% Explanation: hope it helps here for ur service

439.16 g of carbon dioxide is produced by complete combustion of 140 g of propene. The percent yield is 45.54%.

Combustion is defined as a high temperature exothermic reaction between a fuel which acts as a reductant and an oxidant which is usually atmospheric oxygen.It does not result in fire as the flame is visible only when substance which undergoes combustion vaporizes.

For combustion reactions to take place stoichiometry is followed according to which mass of reactants or products obtained or required is calculated.

2 C₃H₆ + 9 O₂  \(\rightarrow\) 6 CO₂ + 6 H₂O

Here 2 molecules of propene react to give 6 molecules of carbon dioxide.

∴ for 140 grams of propene 140×264/84.16=439.16 g of molecules of CO₂ are produced.

Percent yield is calculated by dividing observed yield by theoretical yield which gives 45.54% according to this example.

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Answer:

Radio waves were first developed in WWII

Explanation:

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Answer: He had more than one independent variable.

Explanation: It would only be fair, if both plants were in a sunny window, because then, it would be easier to see if the fertilizer actually affected the plants. This is because there is always a chance that the lack of sunlight decreased the number of flowers on the plant, instead of the fertilizer. It is always better to just have one independent variable.

The ultimate electron acceptor in the fermentation of glucose to ethanol is an organic molecule called acetaldehyde.

During the fermentation of glucose to ethanol, the process occurs in the absence of oxygen, known as anaerobic conditions. In this process, glucose is metabolized by yeast or other microorganisms, converting it into ethanol and carbon dioxide.

The initial step in glucose fermentation involves the breakdown of glucose into two molecules of pyruvate through a series of enzymatic reactions known as glycolysis. This process occurs in the cytoplasm of the cell and produces a small amount of ATP.

Following glycolysis, pyruvate is further metabolized into ethanol and carbon dioxide. This step occurs in the mitochondria of yeast cells or the cytoplasm of other microorganisms.

In this step, pyruvate is first converted into acetaldehyde by an enzyme called pyruvate decarboxylase. This reaction involves the removal of a carbon dioxide molecule from pyruvate, resulting in the formation of acetaldehyde.

Next, acetaldehyde is reduced to ethanol by an enzyme called alcohol dehydrogenase. In this reaction, acetaldehyde accepts electrons and hydrogen ions (H+) from the NADH molecule, which is formed during glycolysis. As a result, NADH is oxidized to NAD+ while acetaldehyde is reduced to ethanol.

In the fermentation of glucose to ethanol, acetaldehyde acts as the ultimate electron acceptor. It accepts electrons and hydrogen ions from NADH, leading to the conversion of acetaldehyde to ethanol. This process allows for the regeneration of NAD+ and the continuation of glycolysis, enabling the production of ATP through anaerobic metabolism.

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Answer:

it is the  Sparta ruined Athens’s farmland to try to get Athens to fight on farm land

Explanation:

just did

Answer:

the answer is B

Explanation:

Answer:

hey yk me from pad let

Explanation:

Glass is a transparent material as it allows light to pass through.

The question is incomplete as the images that have been referred to here are not shown and as such I will just consider glass as a transparent material.

Glass, which is primarily made of silicon dioxide with a few impurities, is more properly classified as a supercooled liquid than as a solid. It is translucent because there are no internal grain boundaries.

The photon instead moves through unhindered. The glass is translucent as a result.

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Answer:

b

Explanation:

b

the trapped salts go to seawater concentrate

Answer:

My greatest influence on career pathing right now is minecraft hardcore.Track and strand choice.

Answer:

The balanced reaction for the decomposition of baking soda is

2 NaHCO3(s) → Na2CO3(s) + CO2(g) + H2O(g)

We can find the heat of reaction by using the Hess' Law. This is done by using this formula:

∑(Hf,products) -∑(Hf,reactants) = Heat of reaction

where Hf is the heat of formation. According to literature, these are the heats of formation for each of the compounds in the reaction:

NaHCO3: -947.68 kJ/mol

Na2CO3: -1130.94 kJ/mol

CO2: -393.51 kJ/mol

H2O: -241.8 kJ/mol

Applying Hess' Law:

[1(-1130.94) + 1(-241.82)] + 1(-393.51)] - [2(-947.68)] = 129.09 kJ

Thus, the heat of reaction is 129.09 kJ/mol NaHCO3. Since there is 1.96 mol of NaHCO3, the total heat of reaction is 253.02 kJ

Explanation:

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B

The sodium hydroxide (NaOH) solution is a basic solution, so the pH of that solution should be close to 14

then when adding hydrochloric acid (HCl) we start to neutralice the solution, meaning the pH must sift slowly to lower pH.

Assuming both solutions have similar concentration the pH shall shift form basic (above 7) to acid pH (below 7). Until now both B and D images agreed with the explanation given. To chose between them we need to remember that HCl is a very strong acid, which means that in solution will get to very acid solutions (very low pH values) which leaves only B as possible answer

Answer:

Explanation:

At three-quarters of a teaspoon of baking soda, the cookie's texture becomes fragile like that of a soda cracker, with a deeply roasted flavor that distracts from the ginger.

Investing in property can offer several advantages and disadvantages. Here are three pros and three cons of investing in property:

Pros of Investing in Property:

Potential for Appreciation: One of the main advantages of property investment is the potential for property value appreciation over time. Real estate properties, especially in desirable locations, have the potential to increase in value, allowing investors to build wealth and generate a return on their investment.

Rental Income: Property investment can provide a steady stream of rental income. By purchasing residential or commercial properties and renting them out to tenants, investors can generate regular cash flow, which can be particularly beneficial for long-term financial planning or as an additional income source.

Portfolio Diversification: Investing in property allows for diversification of an investment portfolio. Real estate is considered an alternative asset class that can help balance the risk and return profile of an investment portfolio that may primarily consist of stocks and bonds. Adding property investments can reduce exposure to volatility in other markets.

Cons of Investing in Property:

High Initial Costs: Acquiring property often requires a substantial upfront investment. Investors need to consider the down payment, closing costs, property maintenance expenses, and potential renovation costs. This can be a barrier for individuals with limited capital or seeking more liquid investments.

Market Volatility and Liquidity: The property market can be subject to fluctuations and cycles, which can affect property values. Unlike stocks or bonds, buying or selling property may take time and effort, reducing liquidity. In certain market conditions, it may be challenging to sell a property quickly if needed.

Management and Maintenance: Property investment requires active management and ongoing maintenance. Landlords are responsible for property upkeep, repairs, and addressing tenant issues. Managing rental properties can be time-consuming and may involve dealing with various challenges such as vacancies, property damage, and rental disputes.

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Metals and nonmetals usually form ionic compounds, whereas two bonded nonmetals are never ionic because of their electronegativity difference.

Electronegativity is the measure of an element's tendency to attract bonding electrons towards itself. Metals are usually electropositive, meaning they have fewer electrons in their outer shell, while nonmetals are usually electronegative, meaning they have more electrons in their outer shell than metals.

The electronegativity difference between a metal and a nonmetal is usually high, resulting in ionic bonding. The electrons of the metal are transferred to the nonmetal, forming ions. For example, sodium (Na) and chlorine (Cl) react to form an ionic compound, sodium chloride (NaCl). The Na atom gives its outer electron to the Cl atom to form Na+ and Cl- ions respectively. This transfer of electrons produces a stable arrangement of ions.

In contrast, the electronegativity difference between two nonmetals is usually low, leading to covalent bonding. In covalent bonding, the atoms share their outer electrons to form a stable molecule. For example, H2O is a covalent compound, where two hydrogen atoms and an oxygen atom share their outer electrons to form a molecule.

Hence, the two bonded nonmetals never form ionic compounds.

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The correct answer is:

Keq<1, ΔG∘>0

When a system is at equilibrium, the forward and reverse reactions occur at equal rates. At this point, the concentrations of the reactants and products do not change over time. The equilibrium constant (Keq) is a measure of the relative concentrations of the reactants and products at equilibrium.

If the reactants are more abundant at equilibrium, it means that the equilibrium lies towards the side of the reactants. This suggests that the value of Keq is less than 1, since the ratio of products to reactants is low. Additionally, a positive ΔG∘ (standard free energy change) indicates that the reaction is not spontaneous in the forward direction, meaning that energy must be added to the system to proceed in that direction.

Therefore, the correct statement is: Keq<1, ΔG∘>0.

It's important to note that this answer assumes standard conditions (25°C, 1 atm pressure, and 1 M concentration). At different temperatures and concentrations, the values of Keq and ΔG∘ may change.

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Answer:

Phosphorous.

Explanation:

In 1649 Hennig Brand discovered phosphorous.

The substances at the start of a chemical reaction that change to other substances are known as reactants.

What is a Chemical reaction ?

When one or more chemicals are transformed into one or more other compounds, a chemical reaction takes place. Example: the formation of rust when iron and oxygen combine. Sodium acetate, carbon dioxide, and water are produced when vinegar and baking soda are combined.

Reactants are the substance(s) in a chemical equation to the left of the arrow. A component that is present at the outset of a chemical reaction is known as a reactant. Products are the substance(s) to the right of the arrow. A substance that remains after a chemical reaction is complete is known as a product.

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The rate of the reaction is 0.075 mol/L x min.

In the balanced chemical equation:

N₂ + 3H₂ → 2NH₃

The stoichiometry tells us that for every 1 mole of N₂ reacting, 2 moles of NH₃ are formed. Therefore, the ratio of the rate of formation of NH₃ to the rate of the reaction is 2:1.

Given that the rate of formation of NH₃ is 0.15 mol/L x min, we can determine the rate of the reaction by dividing this value by the stoichiometric coefficient of NH₃, which is 2:

Rate of reaction = (Rate of formation of NH₃) / (Stoichiometric coefficient of NH₃)

Rate of reaction = 0.15 mol/L x min / 2

Calculating this, we find:

Rate of reaction = 0.075 mol/L x min

Therefore, the rate of the reaction is 0.075 mol/L x min.

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Hg⁺ with I⁻ forms HgI

Hg⁺ with S²⁻ forms Hg₂S

Hg⁺ with CO₃²⁻ forms Hg₂CO₃

K⁺ with I⁻ forms KI

K⁺ with S²⁻ forms K₂S

K⁺ with CO₃²⁻ forms K₂CO₃

Answer:

False

Explanation:

The earth goes around the

Answer:

False

Explanation:

The Earth revolves around the sun.

A better explanation of these systems is given using molecular orbital theory.

The valence bond theory hold that a  bond is formed by the sharing of two electron in a covalent bond. This bond does not account for certain systems that occur in multiple bonded systems where the simple two electron bonding model does not suffice.

Thus, valence bond theory is inadequate for describing systems with multiple adjacent  bonds that overlap, as in aromatic molecules. a better explanation of these systems is given using molecular orbital theory.

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Answer:

An atom is a complex arrangement of negatively charged electrons arranged in defined shells about a positively charged nucleus. This nucleus contains most of the atom's mass and is composed of protons and neutrons (except for common hydrogen which has only one proton).

Answer:

Atoms consist of an extremely small, positively charged nucleus in which the protons and neutrons can be found, and is surrounded by a cloud of negatively charged electrons.

Answer:

C. 0.1 mol of V₂O₅

Explanation:

Number of moles of oxygen atoms present in each molecule is derived as follows:

A. Number of molecules of CO₂ in 12.044 * 10²³ molecules of CO₂ = 12.044 * 10²³/6.022 * 10²³ = 2 moles of CO₂ molecules

Each molecule of CO₂ contains 2 atoms of oxygen. Therefore, number of moles of oxygen atom present in 2 molecules of CO₂ = 2 * 2 moles of oxygen atoms = 4 moles of oxygen atoms.

B. Number of moles of O₃ molecules in 12g of O₃ = mass of O₃/molar mass of O₃

molar mass of O₃ = 48 g/mol

Number of  moles of O₃ molecules = 12/48 = 0.25 moles of O₃

There are 3 atoms of oxygen in a molecule of O₃, therefore number of moles of oxygen atoms present in 12 g of O₃ = 3 * 0.25 = 0.75 moles of oxygen atoms

C. There are 5 oxygen atoms in a molecule of V₂O₅

0.1 mol of V₂O₅ contains 0.1 * 5 moles of oxygen atoms = 0.5 moles of oxygen atoms.

D. mass of 10 mL of H₂O = 10 g since the density of H₂O = 1 g/mL

molar mass of H₂O = 18.0 g/mol

Number of moles of H₂O in 10 g of H₂O = 10/18 = 0.56 moles

There are 1 atom of oxygen in a molecule of H₂O, therefore, number of moles of oxygen present in 10 g of H₂O = 0.56 * 1 = 0.56 moles of oxygen atoms

Therefore, 0.1 mole of V₂O₅ contains the least number of oxygen atoms.

The pH of the resulting solution when 250 mL of 2.1 M HBr is mixed with 200 mL of 2.5 M KOH is 12.7.

This can be calculated by first finding the moles of each of the reactants, and then using the ICE table to determine the concentration of ions in the solution. The equation for the ICE table is:

The concentration of H3O+ can then be determined by taking the square root of the KW, and the concentration of the OH- can be calculated by dividing the KW by the H3O+ concentration. The pH can then be calculated by taking the negative log of the H3O+ concentration.

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Explanation:

could you post the text? its inconvenient to go back and forth to the picture.