5.4 g of Aluminium reacts with 300 mL of 0.2 mol/L hydrochloric acid solution. a. Write equation for the reaction taking place. b. Specify which reactant is limiting and which reactant is excess. c. Find volume of the gas collected at S.T.P d. How many grams of salt are produced at the end of the reaction? e. How many grams of the excess reactant are left ate the end of the reaction? Given: Al=27 , H=1 , Cl=35.5

Answer:

Response is below

Explanation:

The different types of mining are underground, surface, placer, and in-situ. Underground mining uses various materials to excavate resources from beneath the surface of the Earth. Surface mining is a category of mining that in which soil and rock overlying the mineral deposit are removed. Placer mining is the mining of stream bed deposits for minerals. In-situ mining is a mining process used to recover minerals such as copper and uranium through boreholes drilled into a deposit.

We only have 7.0 moles of O2, which is less than the required 35 moles, the limiting reactant in this case is O2.

To determine the limiting reactant in a chemical reaction, we need to compare the stoichiometry of the reactants and see which one will be completely consumed first. The balanced equation for the reaction is:

C3H8 + 5O2 -> 3CO2 + 4H2O

From the balanced equation, we can see that the ratio between C3H8 and O2 is 1:5. This means that for every mole of C3H8, we need 5 moles of O2 to react completely.

Given that we have 7.0 moles of C3H8 and 7.0 moles of O2, we can calculate the moles of O2 required:

Moles of O2 required = 5 x moles of C3H8 = 5 x 7.0 moles = 35 moles

Since we only have 7.0 moles of O2, which is less than the required 35 moles, the limiting reactant in this case is O2.

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Explanation:

The forms of thermal energy transfer are;

Thermal energy is a form of kinetic energy that causes the particles of a medium to begin to move.

The least soluble salt in the list is PbCl2 .

The Pb2+ cation repels water molecules less forcibly than smaller or less charged cations due to its size and high charge density. PbCl2 is hence less soluble in water.

The strength of the ionic bonds between Pb2+ and Cl- ions should also be taken into account. Within the lattice structure of PbCl2, the Pb2+ and Cl- ions are arranged in a regular way to form a crystalline solid.

The strength of the ionic bonds between Pb2+ and Cl- ions accounts for the low solubility

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The change in the enthalpy of a reaction can be found by subtracting the total enthalpy of the reactants from the total enthalpy of the products. If the change in enthalpy is positive, this means that the reaction is endothermic, meaning that energy is absorbed from the surroundings. If it is negative, this means that the reaction is exothermic, meaning that energy is released into the surroundings

To find the change in enthalpy of a reaction, you need to follow these steps:

1. Determine the enthalpy values for the reactants and products of the reaction. These can usually be found in a reference book or online.

2. Calculate the total enthalpy for the reactants by multiplying their enthalpy values by their respective coefficients in the balanced equation.

3. Calculate the total enthalpy for the products in the same manner.

4. Subtract the total enthalpy of the reactants from the total enthalpy of the products to find the change in enthalpy.

If the change in enthalpy is positive, it means the reaction is endothermic, meaning that it absorbs heat from the surroundings. Conversely, if the change in enthalpy is negative, it means the reaction is exothermic, meaning that it releases heat into the surroundings.

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One of the products of this reaction is solid tin(II) carbonate (SnCO₃).

When aqueous sodium carbonate (Na₂CO₃) reacts with aqueous tin(II) nitrate (Sn(NO₃)₂), a double-replacement reaction takes place. The balanced chemical equation for the reaction is,

Na₂CO₃(aq) + Sn(NO₃)₂(aq) → SnCO₃(s) + 2NaNO₃(aq)

In this reaction, the sodium ion and nitrate ion from the sodium carbonate and tin(II) ion and nitrate ion from the tin(II) nitrate switch places to form solid tin(II) carbonate and aqueous sodium nitrate.

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Answer:

Under the concept of popular sovereignty, the people of each territory would decide whether or not slavery would be permitted.

Explanation:

hopes this help 3> D:

Answer:A

Explanation:

Answer:

m

Explanation:

Approximately 7.98 grams of silver chromate will precipitate when 150 mL of 0.500 M silver nitrate is added to 100 mL of 0.400 M potassium chromate.

To determine the amount of silver chromate that will precipitate when 150 mL of 0.500 M silver nitrate is added to 100 mL of 0.400 M potassium chromate, we need to identify the limiting reagent and calculate the corresponding amount of silver chromate formed.

First, we can calculate the number of moles of silver nitrate and potassium chromate using their respective concentrations and volumes:

Moles of silver nitrate = concentration × volume = 0.500 M × 0.150 L = 0.075 mol

Moles of potassium chromate = concentration × volume = 0.400 M × 0.100 L = 0.040 mol

From the balanced chemical equation:

2 AgNO3 + K2CrO4 → Ag2CrO4 + 2 KNO3

We can see that the stoichiometric ratio between silver nitrate and silver chromate is 2:1. Therefore, the moles of silver chromate formed will be half the moles of silver nitrate used:

Moles of silver chromate formed = 0.075 mol / 2 = 0.0375 mol

Finally, we can calculate the mass of silver chromate using its molar mass:

Mass of silver chromate = moles × molar mass = 0.0375 mol × (2 × 107.87 g/mol) = 7.98 g

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Answer:

The answer is number 3

Explanation:

hope it helps

Answer:

1,4,2,3,8 there you go, I don't know if it is 100 percent correct

To determine the enthalpy of the reaction, we can use Hess's Law, which states that the enthalpy change of a reaction is equal to the sum of the enthalpies of formation of the products minus the sum of the enthalpies of formation of the reactants.

The enthalpy of the reaction is -453.46 kJ.

To calculate the enthalpy of the reaction, we need to know the enthalpies of formation (ΔHf) for all the reactants and products involved in the reaction. The enthalpy of formation is the enthalpy change when one mole of a compound is formed from its constituent elements in their standard states.

Once we have the enthalpies of formation for all the reactants and products, we can substitute them into the equation ΔHrxn = ΣΔHf(products) - ΣΔHf(reactants) to calculate the enthalpy change of the reaction.

Since the information provided in the question does not include the enthalpies of formation for the reactants and products, we cannot determine the specific enthalpy value using the given equation and table. Therefore, without the necessary data, we cannot provide a specific enthalpy value for the reaction.

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Answer: 2

Explanation:

it’s reflected

Answer:

Transmitted

Explanation:

Because this is when its granted safe passage through the medum

Absorbed: energy goes through and disappears

Reflected: is when light bounces off a surface (mirrors)

The results of a scientific investigation would be considered reliable only if all aspects of the investigation have been carefully planned and executed.

A scientific investigation is a process that is used to answer questions or solve problems about the natural world using the scientific method. The scientific method is a systematic approach that involves formulating a hypothesis, designing an experiment, collecting and analyzing data, and drawing conclusions based on the results.The reliability of the results of a scientific investigation depends on several factors. First, the experiment must be carefully planned to ensure that it is well-designed and that all variables are controlled. This means that the experiment should be designed to test a specific hypothesis and that all variables that might affect the results of the experiment should be controlled or eliminated.Second, the experiment must be executed carefully to ensure that all procedures are followed correctly and that all data is collected accurately. This means that the experiment should be conducted in a controlled environment and that all data should be recorded and analyzed accurately.Finally, the results of the experiment must be analyzed carefully to ensure that they are reliable and valid. This means that the data should be analyzed using appropriate statistical methods to determine whether the results are statistically significant and that any conclusions drawn from the data are based on sound reasoning and logic.In conclusion, the results of a scientific investigation would be considered reliable only if all aspects of the investigation have been carefully planned and executed.

This means that the experiment must be well-designed, carefully executed, and analyzed using appropriate statistical methods to ensure that the results are reliable and valid.

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Taking into account the definition of density, the density of the jam in the jar is 1.4 g/cm³.

Density is defined as the property that matter, whether solid, liquid or gas, has to compress into a given space.

In other words, density is a quantity that allows to measure the amount of mass in a certain volume of a substance.

The expression for the calculation of density is the quotient between the mass of a body and the volume it occupies:

density= mass÷ volume

In this case, you know that:

Replacing in the definition of density:

density= 91 g÷ 65 cm³

Solving:

density= 1.4 g/cm³

In summary, the density is 1.4 g/cm³.

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Answer:

Explanation:

The most prominent function of mitochondria is to produce the energy currency of the cell, ATP (i.e., phosphorylation of ADP), through respiration and using sugar as fuel, and to regulate cellular metabolism .

The pillar of sustainability broken by recycling electronics in India is environmental sustainability. Implementing a law that restricts electronics recycling to the US would not necessarily be the most effective solution, as it overlooks the complex global dynamics of electronic waste management.

Recycling electronics in India often involves improper disposal methods, such as burning or dismantling without proper safety measures. This leads to environmental pollution, including the release of hazardous substances into the air, soil, and water, thus violating the principle of environmental sustainability.

However, simply mandating that electronics can only be recycled in the US may not be the most optimal solution. Electronic waste is a global issue, and restricting recycling to a single country disregards the fact that electronic products are manufactured and consumed worldwide. A more comprehensive approach to addressing electronic waste would involve international cooperation, strict regulations, and monitoring of recycling practices to ensure they meet environmental standards.

Efforts should focus on improving recycling practices globally, including promoting responsible electronic waste management, developing sustainable recycling infrastructure in multiple countries, and encouraging the adoption of safe and environmentally friendly recycling practices. This approach would foster global sustainability and address the challenges associated with electronic waste disposal more effectively than a geographically limited restriction.

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Answer:

The salt bridge (or porous disk) connects the two half cells together. As electrons flow from one cell to another, ions flow through the salt bridge to maintain a charge equilibrium. Had there not been a salt bridge, the reduction and oxidation reactions would eventually stop due to the difference in charge.

What would happen if no salt bridge were used in an electrochemical?

If no salt bridge were present, the solution in one-half cell would accumulate a negative charge and the solution in the other half cell would accumulate a positive charge as the reaction proceeded, quickly preventing further reaction, and hence the production of electricity.

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AMSWER IN THE ATTACHMENT.

Energy is released when an electron transitions from one energy level to another. In contrast, the same amount of energy is needed to carry out the process, the other way around, from the bottom elevation to the upper one.

What occurs when an electron transitions from one energy level to another?

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A chemist experiments on a molecule with the formula of c5h10o5. this compound is likely a(n)  carbohydrates.

A molecule with the formula C₅H₁₀O₅  is carbohydrates.

What are Carbohydrates?

therefore the molecular method C₅H₁₀O₅ represents carbohydrates.

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Answer:

(True) The answer to that is yes, global warming is a hotly debated topic.

Explanation:

As a matter of political controversy, global warming is often viewed from different political perspectives. Which is why it is still an issue. (In 1988, global warming became a topic of discussion.) A number of climate change-related phenomena are occurring due to climate change, including rising temperatures, droughts and wildfires, changing precipitation patterns, glaciers melting, and rising sea levels.

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The 85th percentile of blood pressure readings is approximately 137.64. a. To calculate the z-score for a blood pressure reading of 140, we can use the formula:

z = (x - μ) / σ

where x is the value (140 in this case), μ is the mean (121), and σ is the standard deviation (16).

Substituting the values into the formula:

z = (140 - 121) / 16

z ≈ 1.19 (rounded to two decimal places)

b. To find the proportion of Canadians with high blood pressure, we need to calculate the area under the normal distribution curve for values above 140. This can be done by finding the cumulative probability using the z-score.

Using a standard normal distribution table or a calculator, we can find that the cumulative probability corresponding to a z-score of 1.19 is approximately 0.881.

Therefore, the proportion of Canadians with high blood pressure is approximately 0.881 (rounded to four decimal places).

c. To find the proportion of Canadians with systolic blood pressure in the range from 100 to 140, we need to calculate the area under the normal distribution curve between these two values.

Using the z-scores corresponding to 100 and 140, we can find the cumulative probabilities for each value. The cumulative probability for a z-score of -1.25 (corresponding to 100) is approximately 0.105, and the cumulative probability for a z-score of 1.19 (corresponding to 140) is approximately 0.881 (as calculated in part b).

The proportion with systolic blood pressure between 100 and 140 is the difference between these two probabilities:

Proportion = 0.881 - 0.105 ≈ 0.776 (rounded to four decimal places)

d. The 85th percentile represents the value below which 85% of the blood pressure readings fall. To find the 85th percentile, we need to determine the z-score that corresponds to an area of 0.85 under the normal distribution curve.

Using a standard normal distribution table or a calculator, we can find that the z-score corresponding to an area of 0.85 is approximately 1.04.

To find the actual blood pressure reading at the 85th percentile, we can use the z-score formula:

x = μ + (z * σ)

Substituting the values:

x = 121 + (1.04 * 16)

x ≈ 137.64

Therefore, the 85th percentile of blood pressure readings is approximately 137.64.

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To find the concentration of CO32- needed to initiate precipitation in the solution containing 1.16x10^-2 M Fe2+ and 1.48x10^-2 M Cd2+,

We can follow these steps:

Explanation :

1. Calculate the ion product (Q) for both Fe2+ and Cd2+ using their solubility product constants (Ksp).

The Ksp values for FeCO3 and CdCO3 are 3.1x10^-11 and 5.2x10^-12, respectively.

2. Calculate Q for both ions using the initial concentrations:
  Q_Fe = [Fe2+] [CO32-]
  Q_Cd = [Cd2+] [CO32-]

3. Determine the critical concentration of CO2 needed to initiate precipitation. This occurs when Q = Ksp for one of the ions.

For FeCO3:
  3.1x10^-11 = (1.16x10^-2) [CO32-]
  [CO32-] = 2.67x10^-9 M

For CdCO3:
  5.2x10^-12 = (1.48x10^-2) [CO32-]
  [CO32-] = 3.51x10^-10 M

4. Compare the calculated CO32- concentrations.

The lower concentration will be the one needed to initiate precipitation, as it will cause one of the ions to precipitate first.

In this case, the concentration of CO32- needed to initiate precipitation is 1.22x10^-12 M.

This concentration will cause the Cd2+ ion to precipitate first, just before the Fe2+ begins to precipitate.

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The main difference between a colloid and solution lies in the size of the particles dispersed in the medium.

1. Colloid: A colloid is a mixture in which tiny particles (between 1 nanometer and 1 micrometer in size) are dispersed evenly throughout a continuous medium. The dispersed particles do not settle and remain suspended due to their relatively larger size. Examples of colloids include milk, fog, and gelatin.

2. Solution: A solution is a homogeneous mixture in which the particles are molecular or ionic in size (less than 1 nanometer) and are uniformly distributed throughout a solvent. The particles in a solution are so small that they do not scatter light, and the mixture appears transparent. Common examples of solutions include saltwater, sugar dissolved in water, and air.

In summary, the key distinction between a colloid and a solution lies in the size of the dispersed particles. Colloids have larger particles that remain suspended, resulting in a cloudy or opaque appearance, whereas solutions have much smaller particles that are molecular or ionic in size and result in a clear and transparent mixture. Understanding this difference helps to differentiate between these two types of mixtures in various scientific and everyday contexts.

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Answer:

1. highest is 25.7c° and lowest is 20.0c°

2.Is Exothermic.  An Endothermic Reaction is a chemical reaction that absorbs energy in the form of light or heat. In it, the energy or enthalpy of the reactants is less than that of the products. An Exothermic Reaction is a chemical reaction that gives off energy in the form of light or heat.

3. Reactans.

4. The substance(s) to the left of the arrow in a chemical equation are called reactants. A reactant is a substance that is present at the start of a chemical reaction. The substance(s) to the right of the arrow are called products . A product is a substance that is present at the end of a chemical reaction.

Answer:

c. alcohol

Explanation:

Alcohol is -OH

Ether is -OR

Ester is O=C-OR

Aldehyde is O=C-H

- Only alcohol fits

Alcohol is the type of organic compound is represented by the structural formula.

This can be defined as the type of organic compound that carries at least one hydroxyl functional group (−OH) bound to a saturated carbon atom.

The hydroxyl group(OH) is attached to a Carbon atom in the diagram which depicts features of an Alcohol.

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Answer:

it's sample c yh it is true

Answer:

A)

Explanation:

Unit Test Edg 2020