The information below describes a redox reaction.
Ag+ (aq) + Al(s) — Ag(s) + Al3+ (aq)
Ag+ (aq) + -> Ag(s)
Al(s)->A3+ (aq) + 3e-
What is the coefficient of silver in the final, balanced equation for this reaction?

The answer is c and possibly a I don't know why im here i dont know what this is so bye...

Explanation:

C I hope this is right for your question.

Answer:If a liquid is heated the particles are given more energy and move faster and faster expanding the liquid. The most energetic particles at the surface escape from the surface of the liquid as a vapour as it gets warmer. Liquids evaporate faster as they heat up and more particles have enough energy to break away.

Explanation:

Answer: Submarine

Explanation:

Depends on the size and weight of the sailboat and submarine but the submarine will have more momentum because it is heavier.

Answer: The answer is incus

Answer:

Two positive aspects of using methane recapture systems are able to generate significant electricity. Another benefit is that the process of anaerobic digestion creates heat that can be used to warm buildings where animals are kept

Answer:  The correct answer is;

Two positive aspects of using methane recapture systems include lowering the impact on greenhouse gasses and the production of energy. Methane is a very potent greenhouse gas that is contributing to global warming. As a result, the recapturing process reduces the methane impacts of global warming by reclaiming and reusing the gas for other purposes. Recaptured methane can be stored and used to generate electricity or used as fuel to power updated vehicles and other engines on the farm. The overall benefits from this combination are reducing impacts causing global warming and lower the cost of electricity or fuel on the farm.

Explanation:  This answer has been confirmed correct.

The coefficients needed to balance the equation would be 2, 7, 4, and 6 respectively.

This requires that the number of atoms of each element is the same both on the reactant and product's sides.

Hence, the balanced equation of the reaction becomes:

\(2C_2 H_6 O+ 7O_2 --- > 4CO_2 +6H_2 O\)

Thus, the coefficient for each species would be 2, 7, 4, and 6 respectively.

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From each drop-down menu, a solid has (a definite volume and a definite shape), a Liquid has (a definite volume) and gas has ( non of the above)

Matter is defined as anything that has weight and occupies space.

There are three states of matter that is in existence which include:

Therefore, a liquid occupies the shape of its container.

Therefore, a gas neither has a definite shape nor volume.

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There are 8 atoms in the compound described by this chemical formula. There are 2 Carbon atoms (C), 6 Hydrogen atoms (H), and 1 Nitrogen atom (N).

Atom is the smallest unit of matter that makes up all materials. It is composed of a nucleus, which contains protons and neutrons, surrounded by electrons. All elements consist of different combinations of atoms. Atoms can combine in various ways to form molecules, which are the basis of all matter on Earth. In chemistry, atoms are the building blocks of matter and are essential for understanding the structure and properties of different substances. Additionally, atoms can be used to understand the interactions between elements and molecules, the chemical reactions that occur between them, and the changes in energy that occur during these reactions.

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Contributing to the body of knowledge.

When you decide whether or not the data supports the original hypothesis, you are "contributing to the body of knowledge." Explanation:Scientific investigation is a way of answering questions about the natural world. An inquiry or investigation can be initiated by a researcher or a group of researchers who have questions regarding a certain phenomenon. The inquiry or investigation is usually done by conducting an experiment or making an observation and then collecting data. After collecting the data, the researchers analyze it to check if it supports their hypothesis or not.The body of knowledge refers to the totality of data that has been collected and analyzed. It comprises all the data that researchers have acquired over time through scientific investigations. When researchers decide whether or not the data supports their original hypothesis, they contribute to this body of knowledge. The new data may either confirm the hypothesis or lead to a revision or rejection of it, adding to the body of knowledge.

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Before the pH drops below 7.0, the buffering mechanism in blood can neutralise 1.26 kg of HCl.

(a) The equilibrium expression for the reaction between H₂CO₃ and HCO₃₋ is:

H₂CO₃ ↔ H+ + HCO₃₋

The pKa for H2CO3 at body temperature is 6.1, so the pH of blood plasma can be calculated using the Henderson-Hasselbalch equation:

pH = pKa + log([HCO₃₋]/[H₂CO₃])

pH = 6.1 + log(0.024/0.0012)

pH = 7.4

Therefore, the pH of blood plasma is 7.4.

(b) The buffering capacity of blood can be calculated using the equation:

buffering capacity = Δ[HCO₃₋]/ΔpH

ΔpH is the change in pH that can be tolerated before the buffering system is overwhelmed. The buffering capacity of blood is highest at a pH of 7.4, which is the normal pH of blood plasma. Therefore, we will use a pH range of 7.4 ± 0.6 (i.e., from 6.8 to 8.0) to calculate the buffering capacity.

At pH 6.8, the [H+] is 10 times higher than at pH 7.4, so [H+] = 10^-6.8 = 1.58 × 10^-7 M.

At pH 8.0, the [H+] is 10 times lower than at pH 7.4, so [H+] = 10^-8.0 = 1.00 × 10^-8 M.

The change in [HCO3-] can be calculated using the Henderson-Hasselbalch equation:

[HCO₃₋] = [H₂CO₃]/(1 + 10^(pH-pKa))

At pH 6.8:

[HCO₃₋] = 0.0012/(1 + 10^(6.8-6.1)) = 0.0006 M

At pH 8.0:

[HCO₃₋] = 0.0012/(1 + 10^(8.0-6.1)) = 0.011 M

Δ[HCO₃₋] = 0.011 - 0.0006 = 0.0104 M

Therefore, the buffering capacity of blood is:

buffering capacity = 0.0104/0.6 = 0.0173 M/pH

The amount of HCl that can be neutralized before the pH falls below 7.0 can be calculated using the buffering capacity:

[H+] = 10⁻⁷ = 1.00 × 10⁻⁷ M

Δ[HCO₃₋] = buffering capacity × ΔpH = 0.0173 × (7.4 - 7.0) = 0.0069 M

The amount of HCl that can be neutralized is:

mass of HCl = Δ[HCO₃₋] × volume of blood × molar mass of HCl

mass of HCl = 0.0069 × 5.0 × 10^3 × 36.5 = 1.26 × 10³ g

Therefore, the buffering system in blood can neutralize 1.26 kg of HCl before the pH falls below 7.0.

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Answer:

Coal; H2SO4(sulfuric acid)

Explanation:

Coal has been very helpful in power generation for decades. It has also become a major contributor to global warming, and has major negative effects on human health and the environment.

Coal is formed when dead plant matter submerged in swamp environments is subjected to the geological forces of heat and pressure over hundreds of millions of years. Over time, the plant matter transforms from moist, low-carbon peat, to coal, an energy- and carbon-dense black or brownish-black sedimentary rock.

There are many types of coal. Each type of coal must contain sulfur, which, when burned, releases toxic air pollution. The extent Sulfur content in a given coal sample is largely decided by the conditions under which the coal is formed. Low-sulfur coal usually develop in freshwater environments; high-sulfur coals are formed in brackish swamps.

The burning of coal releases its sulphur content as oxides of sulphur (SOx). These oxides of sulphur dissolve in rain water to form acid rain. Hence rain falling around the Colstrip power plant will contain H2SO4 resulting from the dissolution of SOx in rain droplets.

The percentage error of the recorded temperature is 2.9%

Percentage error = (absolute error / actual measurement) × 100

The following data were obtaned from the question:

The percentage error of the recorded temperature can be obtained as follow:

Percentage error = (absolute error / actual measurement) × 100

Percentage error = (1 / 34) × 100

Percentage error = 2.9%

Thus, the perecentage error of the recorded temperature is 2.9%

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Answer:

Because of the difficulties of measuring the atmosphere's properties above the earth's reachable surface

Explanation:

Hello,

In this case, meteorology is the branch of science studying the atmosphere in its weather processes and forecasting and it had a late development because of the difficulties of measuring the atmosphere's properties above the earth's reachable surface. We cannot forget that even nowadays, it is very difficult to predict upcoming weathers with the 100 % assurance and with many days in advance.

Best regards.

Meteorology is developed lately as compared to other branches of science due to far away from the reach of humans.

Meteorology is a late developer compared to other branches of science because the measuring the climatic conditions in the atmosphere is difficult and even impossible without the presence of advance technologies.

To find out the weather as well as climatic conditions can't be measured due to it is not reachable to the human like other materials present on the earth surface so we can conclude that meteorology is developed lately as compared to other branches of science due to far away from the reach of humans.

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Answer:

question no 4 answer is electrons

Aldehydes and ketones are organic compounds which incorporate a carbonyl functional group, C=O. The carbon atom of this group has two remaining bonds that may be occupied by hydrogen or alkyl or aryl substituents. If at least one of these substituents is hydrogen, the compound is an aldehyde. If neither is hydrogen, the compound is a ketone.

Carbonyl compounds having at least one α-hydrogen undergo nucleophilic addition as shown below:

Carbonyl compounds have a carbon atom bonded to oxygen by means of a double bond.

The two other bonding positions are occupied by two R groups or a hydrogen atom and an R group as in aldehydes.

Carbonyl compounds having at least one α-hydrogen undergo nucleophilic addition.

For example, nucleophilic addition of water to ethanal:

CH₃HC=O + H₂0 + H+ ----> CH₃CH(OH)₂

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Answer:

A) 1.60. cm².

B) 3.46 g.

C) 5.98 mL.

D) 4.19 g/mL.

Explanation:

Hello,

In this case, considering that the result is displayed by showing the same significant figures that the shortest number has and considering the eventual rounding when the next number is greater than 5, we obtain:

A) 3.182 cm * 0.503 = 1.600546 cm² but the number is shown with three significant figures (same as 0.503): 1.60 cm².

B) 0.1567 g + 2.10 g + 1.203 g = 3.4597 g but the number is shown with three significant figures (same as 2.10 g): 3.46 g.

C) 8.109 mL – 2.13 mL = 5.979 mL but the number is shown with three significant figures (same as 2.13 mL): 5.98 mL.

D) 9.843 g/2.35 mL = 4.188511 g/mL but the number is shown with three significant figures (same as 2.35 mL): 4.19 g/mL.

Regards.

The order for reactant A is 2 and the order for reactant B is 1. For the first reaction, the overall order of the reaction is 3 and for the second reaction, the overall order of the reaction is 5.

The order of a reaction is the sum of the exponents in the rate law expression that relates the rate of a chemical reaction to the concentrations of the reactants.

To determine the order of each reactant, we need to compare the initial rates of reaction at different concentrations while keeping the concentration of the other reactant constant.

For reactant A:

Exp#1 (0.100 M A, 0.100 M B): initial rate = k(0.100)^2(0.100) = 0.001 k

Exp#2 (0.200 M A, 0.100 M B): initial rate = k(0.200)^2(0.100) = 0.004 k

Exp#3 (0.100 M A, 0.200 M B): initial rate = k(0.100)^2(0.200) = 0.002 k

We can see that when the concentration of A doubles (Exp#1 to Exp#2), the initial rate quadruples, which indicates that A is second order. When the concentration of B doubles (Exp#1 to Exp#3), the initial rate doubles, which indicates that B is first order.

Therefore, the order for reactant A is 2 and the order for reactant B is 1.

To determine the overall order of the reaction, we add the orders of the reactants:

Overall order = 2 (order of A) + 1 (order of B) = 3

Therefore, the overall order of the reaction is 3.

For the second reaction, we can see that the rate depends on the concentration of both reactants, and we cannot determine their individual orders without further information or experiments. However, we can determine the overall order of the reaction by adding the exponents of the concentration terms in the rate law:

Overall order = 1 + 4 = 5

Therefore, the overall order of the reaction is 5.

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There are approximately 1.765 x 10²³ molecules of KCl in 21.89 grams of KCl.

Potassium chloride (KCl) is a compound made up of potassium and chloride ions. It is a colorless, odorless salt that is commonly used in a variety of applications.

Molar mass of KCl is 74.55 g/mol; number of moles = Mass/ Molar mass

So, the number of moles = 21.89 g ÷ 74.55 g/mol = 0.2936 mol

and the number of molecules = Number of moles * Avogadro's number

Number of molecules = 0.2936 mol x 6.02 x 10²³ molecules/mol

Number of molecules = 1.765 x 10²³ molecules

Therefore, there are approximately 1.765 x 10²³ molecules of KCl in 21.89 grams of KCl.

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Answer:

chemical,electrical,light

Explanation:

The battery has chemical energy. When the flashlight is turned on, the chemical energy is first transformed into electrical energy and then into light energy.

Good Luck :)

Chemical, electrical, light

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Answer:

C meteoroid

Explanation:

Meteoroids are the only ones of the four that are under a kilometer in size.

The rate of effusion of helium under same conditions as that of ammonia  is 4.897 mole/min.

Rate of effusion of ammonia is 0.49 times the effusion of helium.Thus, to find out effusion of helium ,effusion of ammonia is divided by 0.49.

Thus, effusion of helium=effusion of ammonia/0.49

=2.40/0.49

=4.897 mole/min.

Effusion relates to the ability of gas to travel through a small opening.Rate of effusion of a gaseous substance is inversely proportional to square root of it's molar mass.The relationship between molar mass and rate of effusion is called Graham's law.

Effusion rate directly depends on the average velocity with which a particle moves.Higher the velocity of particles,higher is the effusion rate.

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Answer:

Zn + 2HCl -> H2 + ZnCl2

CS2 + 2O2 -> CO2 + S2O2

Explanation:

The temperature increase from 20 °C to 46 °C indicates that the reaction between zinc and copper sulfate solution is exothermic, with heat being released into the surroundings.

In the given reaction between zinc and copper sulfate solution, the temperature change can provide insights into the type of heat change occurring during the reaction. Based on the provided information, the initial temperature of the copper sulfate solution was 20 °C, and the final temperature of the mixture after the reaction was 46 °C.

The temperature increase observed in this reaction indicates an exothermic heat change. An exothermic reaction releases heat energy into the surroundings, resulting in a temperature rise. In this case, the reaction between zinc and copper sulfate solution is exothermic because the final temperature is higher than the initial temperature.

During the reaction, zinc displaces copper from copper sulfate to form zinc sulfate and copper metal. This displacement reaction is known as a single displacement or redox reaction. Zinc is more reactive than copper and therefore replaces copper in the compound.

The formation of new chemical bonds during the reaction releases energy in the form of heat. This energy is transferred to the surroundings, leading to an increase in temperature. The heat released is greater than the heat absorbed, resulting in a net increase in temperature.

The exothermic nature of this reaction can be explained by the difference in bond energies between the reactants and products. The breaking of bonds in the reactants requires energy input, while the formation of new bonds in the products releases energy.

In this case, the energy released during the formation of zinc sulfate and copper metal is greater than the energy required to break the bonds in copper sulfate and zinc.

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Approximately 70.57 mL of 1.00 M NaOH should be added to 250 mL of 0.50 M CH3CO₂H to produce a buffer with a pH of 4.50.

To determine the volume of 1.00 M NaOH required to produce a buffer with a pH of 4.50 when added to 250 mL of 0.50 M CH3CO₂H, we need to consider the Henderson-Hasselbalch equation and the stoichiometry of the reaction.

The Henderson-Hasselbalch equation for a buffer solution is given as:

pH = pKa + log([A-]/[HA])

In this case, CH3CO₂H (acetic acid) acts as the weak acid (HA) and CH3COO- (acetate ion) acts as its conjugate base (A-). We are given that the desired pH is 4.50, and we can determine the pKa value for acetic acid from reference sources, which is approximately 4.75.

Using the Henderson-Hasselbalch equation, we can rearrange it to solve for the ratio [A-]/[HA]:

[A-]/[HA] = 10^(pH - pKa)

[A-]/[HA] = 10^(4.50 - 4.75) = 10^(-0.25) = 0.5623

This means that the ratio of the acetate ion to acetic acid in the buffer solution should be approximately 0.5623.

To calculate the required volume of NaOH, we need to consider the stoichiometry of the reaction. Acetic acid reacts with hydroxide ions (OH-) to form acetate ions and water:

CH3CO₂H + OH- → CH3COO- + H2O

The stoichiometric ratio between acetic acid and hydroxide ions is 1:1. Therefore, the volume of 1.00 M NaOH needed can be calculated using the equation:

Volume (NaOH) × 1.00 M = Volume (CH3CO₂H) × 0.50 M × 0.5623

Volume (NaOH) = (Volume (CH3CO₂H) × 0.50 M × 0.5623) / 1.00 M

Volume (NaOH) = (250 mL × 0.50 M × 0.5623) / 1.00 M

Volume (NaOH) ≈ 70.57 mL

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Answer: C(2)H(5)OH + 3O(2) —> 3H(2)O + 2CO(2)

Explanation:

*The number in parentheses or

( ) represents the subscript of the element

Carbon-2

Hydrogen-6

Oxygen-7

I hope this is helpful.

Answer:

the answer is +5

Explanation:

good luck :)

Answer:

b

Explanation:

this is because all organisims need water, c is out of the question because no energy is needed, d is out because it is needed for fighting against predators

Answer:

It is a combustion reaction

Explanation:

I'm not sure about the number, but for sure it's a combustion reaction because the products are water and co2.

After one half life initial amounts gets half so :-

so at last of third half life amount left = 43.75 grams

each time amount get half

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