how many grams of water react to form 6.21 moles of ca(oh)2? cao(s) + h2o(l) → ca(oh)2(s)

The combustion of methane, CH4, releases 890.4 kJ/mol. That is, when one mole of methane is burned, 890.4 kJ are given off to the surroundings. This means that the products have 890.4 kJ less than the reactants.

Combustion of one mole or 16 g of methane gas releases 810 kJ of heat energy. Thus, heat released by the combustion of 22.4 g of methane is 1134 kJ.

Combustion of a substance is its reaction with atmospheric oxygen producing carbon dioxide and water. Combustion of hydrocarbons gases takes places easily and can be burned easily for fuels.

The chemical equation of combustion of methane is written below:

\(\rm CH_{4} + 2O_{2} \rightarrow CO_{2} + 2H_{2}O\)

This is an exothermic process and heat is released from the reaction system.

The heat released by the combustion of one mole of methane is 810 kJ.

molar mass of methane = 16 g/mol

no.of moles in 22.4 g = 22.4/16 = 1.4 g

Thus, heat released by 1.4 moles = 1.4 ×810 kJ =1134 kJ.

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Answer:

fungi

Yeasts are eukaryotic organisms that are included in a group of organisms called “fungi,” which also includes molds and mushrooms. Yeasts can have both positive and negative effects on fermented products consumed by humans and animals.

Explanation:

Answer:  Fungi

Explanation:

Yeasts are eukaryotic organisms that are included in a group of organisms called “fungi,” which also includes molds and mushrooms. Yeasts can have both positive and negative effects on fermented products consumed by humans and animals.

Answer:

The mass of NaCl needed for the reaction is 91.61 g

We'll begin by calculating the number of mole of F₂ that reacted.

Volume (V) = 12 L

Temperature (T) = 280 K

Pressure (P) = 1.5 atm

Gas constant (R) = 0.0821 atm.L/Kmol

Number of mole (n) =?

PV = nRT

1.5 × 12 = n × 0.0821 × 280

18 = n × 22.988

Divide both side by 22.988

n = 18 / 22.988

n = 0.783 mole

Next, we shall determine the mole of NaCl needed for the reaction.

F₂ + 2NaCl —> Cl₂ + 2NaF

From the balanced equation above,

1 mole of F₂ reacted with 2 moles of NaCl.

Therefore,

0.783 mole F₂ will react with = 0.783 × 2 = 1.566 moles of NaCl.

Finally, we shall determine the mass of 1.566 moles of NaCl.

Mole = 1.566 moles

Molar mass of NaCl = 23 + 35.5 = 58.5 g/mol

Mass of NaCl =?

Mass = mole × molar mass

Mass of NaCl = 1.566 × 58.5

Mass of NaCl = 91.61 g

Therefore, the mass of NaCl needed for the reaction is 91.61 g

Explanation:

Answer:

Geosphere

Explanation:

The sphere that was affected by this transformation is the geosphere.

The geosphere is the solid part of the earth which is made up of rocks and soils.

The words that complete these descriptions are law, hypothesis, and experiment.

In science, a law is a statement that accurately describes the way a natural phenomenon occurs. Due to this, laws are created after testing a hypothesis several times. This matches Jean-Baptiste's proposal because his idea about heat flow has been tested by himself and others multiple times.

Different from a law, a hypothesis only states a possible explanation but this should be tested to become a law. This concept can be applied to Sadi because he only has an idea about heat flow but this has not been tested.

This is a procedure that aims at testing a hypothesis. This concept applies to James because he is carrying out an objective procedure to understand energy and heat.

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Answer:

2,5,4,1,3

Explanation:

Answer:

Ionic Bond

Explanation:

Answer:

exactly 25 g​

Explanation:

The mass of an object is universally the same every where. Even in outer space.

This is because, mass is the amount of matter contained in a substance. Since there is no loss in the amount of matter, the mass of the body stays the same.

Mass accounts for every individual matter present in a substance.

When they remain the same, mass does not change. Only a change in the amount of matter in a body can cause variation in mass.

Therefore, at the bottom of the ocean, a body will have the same mass as on top and even at sea level.

Answer:

c. exactly 25 g                

Explanation:

Given that the enthalpy change for the reaction is -67 kJ, the reaction is exothermic, and energy is released as the reaction occurs.

Enthalpy refers to the amount of energy that is stored in a compound's chemical bonds or the heat released or absorbed during a chemical reaction. It is a thermodynamic property that determines the quantity of energy released or absorbed during a process such as chemical reaction or change in state.

When a reaction absorbs energy from its surroundings, it is known as an endothermic reaction. The reaction's enthalpy, which is the energy released or absorbed during a reaction, is positive. The system absorbs energy, which is why it is denoted by a positive value.

When a reaction releases energy into the surrounding, it is referred to as an exothermic reaction. The reaction's enthalpy, which is the energy released or absorbed during a reaction, is negative. The system releases energy, which is why it is denoted by a negative value.

Therefore, the reaction is exothermic and energy is released when the reaction occurs.

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How many moles of tungsten atoms are in 4.8 * 10^25 atoms of tungsten?

Avogadro's number is the number of particles that we have in one mol of particles. It is 6.022 *10^23. For example: in 1 mol of atoms there are 6.022*10^23 atoms.

It's like a dozen. When we say a dozen atoms, we mean 12 atoms. So, when we say a mol of tungsten atoms, we mean 6.022 *10^23 atoms of tungsten.

1 mol of atoms of tungsten = 6.022 *10^23 atoms of tungsten

We will use that relationship to find the number of moles of tungsten atoms that we have in 4.8 *10^25 atoms of tungsten.

number of moles of tungsten atoms = 4.8 *10^25 atoms * 1 mol of atoms/(6.022 *10^23 atoms)

number of moles of tungsten atoms = 79.7 moles = 8 *10^1 moles

number of moles of tunsten atoms = 8.10^1 moles

Answer: b) 8*10¹ moles

Levi's is taking precautions to prevent potentially hazardous chemicals from its supply chain.

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The structure the arrow is pointing to is the nucleus and it helps store genetic material (DNA) in living cells.

Organelle is a specialized structure found inside cells that carries out a specific life process. examples are ribosomes, vacuoles, nucleus etc.

The nucleus is the large membrane-enclosed organelle found in eukaryotic cells which contains genetic material.

The nucleus is located at the center of living cells and it functions to store genetic material called DNA. The DNA is transferred to offsprings for inheritance of traits.

According to this question, a microscopic image of a cell is shown. The arrow pointed to the nucleus of the cell.

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Answer:

0.109728 kilometers

Explanation:

To do dimensional analysis, we have to do the unit conversion. We are given all of the conversions, so the first step is to set up the problem:

\(120 yards*\frac{3feet}{1yard}*\frac{12inches}{1foot}*\frac{2.54cm}{1inch}*\frac{1m}{100cm}*\frac{1km}{1000m}\)

To set up a dimensional analysis problem, we need to figure out what unit we need. Since we need kilometers, we need to make sure it ends up in the numerator at the end of the problem. As you can see, each of the other units gets canceled in the setup (for example, there are yards in the numerator and then the denominator of another fraction, so the two cancel each other out). Now, we have the numbers that we need, so we can solve the problem:

\(\frac{120*3*12*2.54}{100*1000}=\frac{10972.8}{100000}=0.109728 km\)

Therefore, our answer is 0.109728 kilometers

The moral mass of NaOH required is 40 g/mol. Thus, the mass of NaOH which will be required to prepare 500 mL of 0.1M solution is 2.0 g.

For the given information of NaOH

Use the dilution equation M1V1 = M2V2

0.1M x 500 ml = 6.0M x V2

Solve for V2 = 8.33ml

Take 8.33 ml of the concentrated 6.0M NaOH in a volumetric pipet and put into a 500mL volumetric flask. Add distilled water to the 500mL mark of the flask. Mix well.

You needed to use the molarity formula: moles of solute/Liters of solution to find how many moles of solute you needed.

You correctly converted 500 mL to 0.5 L.

Now, we can put the information we already have into the formula

We want a solution with 0.1 M

So, we will do 0.1=x/0.5; 0.1*0.5

Solving for x, we find that we need 0.05 moles of solute NaOH.

The molar mass of NaOH is 40 g/mol. Thus, the mass of NaOH which will be required to prepare 500 mL of 0.1M solution is 2.0 g.

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To find the molarity of the solution that you are supposed to make for the lab, first we need to calculate the moles of sodium chloride used.

Mass of sodium chloride = 175 g

Molar mass of sodium chloride = 58.44 g/mol

No. of moles of NaCl = 175g / 58.44 g/mol = 2.994 moles

Now, Molarity is defined as the number of moles of solute per liter of solution.

Hence molarity of the solution = No. of moles of solute / Volume of solution

Molarity of solution = 2.994 moles / 5 L= 0.5988 M

Thus, the molarity of the solution that you are supposed to make for the lab is 0.5988 M.

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The phase diagram makes it possible to predict the stability of any of the phases of water based on the diagram..

Water is able to exist in three phases; solid, liquid and gas. The reason behind the phases of water is the fact that there are different degrees of intermolecular interactions that exists in the various phases of water.

Thus, on the phase diagram, of is easy to trace the the regions of temperature and pressure that corresponds to the solid, gaseous and liquid states of a given substance that could be used to make deduction about the substance.

The phase diagram shows the interaction between the various phases of water on the same diagram. This makes it possible to predict the stability of any of the phases of water based on the diagram.

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Answer:

True

Explanation:

If you were to change up the order the answer may be incorrect

The scientific process is linear and most commonly follows the same sequence of steps in the same order. However, it need to follow all the steps for all scientific process. Hence, the statement is false.

A scientific process is a well designed approach to investigate or analyze the problem and to test a relevant hypothesis. The steps included in the scientific process starts from a scientific question.

The question then generates a hypothesis based on the observations and standard data. The testing is conducted with well designed experiment with all practical tools available.

The experimental results are thoroughly evaluated and the reaches with a conclusion. The results are communicated through various journals. This is the general way of a scientific process. But not every scientific strictly need to follow this. Hence, the statement is false.

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Answer:

100 trillion atoms are in one cell and  so just find how many cells are in a chair and then take 100xthe number and you get your answer

Explanation:

There are uncountable atoms which are present in a chair depending on it's size.

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:

earth I think like that because earth is the second planet

The three industries commonly associated with battery technology are the automotive, electronics, and renewable energy sectors. Each of these industries faces specific challenges when it comes to developing better batteries.

Automotive Industry:

Electronics Industry:

Renewable Energy Industry:

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When alkaline hydrolysis was first invented, people were hired for various roles related to the process and implementation of this technology. Some of the jobs that emerged include Chemical engineers, Technicians and operators, Waste management specialists, Scientists and researchers.

Chemical engineers: These professionals played a crucial role in developing and optimizing the alkaline hydrolysis process. They were responsible for designing the equipment, developing the necessary chemical reactions, and ensuring the efficient operation of the system.

Technicians and operators: Skilled technicians and operators were hired to operate and maintain the alkaline hydrolysis equipment. They were trained to monitor the process parameters, handle the chemicals involved, and ensure the proper functioning of the system.

Waste management specialists: With the introduction of alkaline hydrolysis as a method for disposal of organic waste, specialized professionals in waste management were employed to oversee the proper handling and treatment of the waste materials. They were responsible for implementing safety protocols, managing waste streams, and complying with environmental regulations.

Scientists and researchers: Alkaline hydrolysis required scientific expertise for continuous improvement and innovation. Scientists and researchers were hired to study the process, analyze the results, and explore potential applications in various fields such as biofuel production and chemical synthesis.

Overall, the introduction of alkaline hydrolysis created employment opportunities for professionals in engineering, chemistry, waste management, and research, among others, as this technology gained recognition and adoption.

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Answer:

The Correct option is "+1"

Answer:

They would be to heavy and you would be really stiff

Explanation:

Imagine walking in a suit made of iron or tin

You would feel like the Tin Man

You would be stiff

Metals are hard and heavy

Answer:

it would be 53

Explanation:

because 4.00 L at 158kPa and 28c would be 53 grams of oxygine

Answer:

Weathering and erosion

Explanation:

Weathering can be explained as the breaking down of rocks/minerals on the surface of the Earth as a result of contact with biological organism, water, air and other factors

. There are 3 common types of weathering which are;

1) physical weathering

2) biological weathering

3) chemical weathering

Erosion can be regarded as a geological process, whereby earthen material are been transported away by natural forces, these forces could be wind as well as water.

Therefore, as you were climbing a a mountain, you noticed that rocks were crumbling below your feet and moving down the mountain. What is observed are weathering and erosion processes.

After the weakening and broken up of the rock by weathering then erosion transport the bit of the rock down the mountain as you are climbing, which means the "weathering process" breakdown and the "erosion process" involves the transport or movement of the bit of the rocks

A buffer solution is defined as a solution that resists a change in pH when a small amount of acid or base is added to it. the buffer capacity of the solution will prevent the pH from changing too much.

The buffer solution containing nitrous acid, HNO2, and potassium nitrite, KNO2, will experience the following changes when a small amount of HClO4 is added to it: The HClO4 added to the buffer solution will react with the potassium nitrite, KNO2, to form the salt, KClO4.T

he HNO2 will be converted to nitric acid, HNO3, by the HClO4.The HNO3 formed in the previous step will react with the potassium nitrite, KNO2, to form nitric oxide, NO, and potassium nitrate, KNO3.The net effect of adding HClO4 to the buffer solution containing nitrous acid, HNO2, and potassium nitrite, KNO2, will be to shift the buffer solution to a more acidic pH range.

However, the buffer capacity of the solution will prevent the pH from changing too much.

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Its tail helps it climb down the tall grasses and lets it swing from the grass like a monkey in a tree

Explanation:

Answer:

Into the adaptive Trait!

Explanation:

When a reaction has reached equilibrium with a given set of conditions, if the conditions are not changed, the reaction will remain at equilibrium forever. The forward and reverse reactions continue at the same equal and opposite rates and the macroscopic properties remain constant.

It is possible, however, to disturb that equilibrium by changing conditions. For example, you could increase the concentration of one of the products, or decrease the concentration of one of the reactants, or change the temperature. When a change of this type is made within a reaction at equilibrium, the reaction is no longer in equilibrium. When you alter something in a reaction at equilibrium, chemists say that you put stress on the equilibrium. When this occurs, the reaction will no longer be in equilibrium and the reaction itself will begin changing the concentrations of reactants and products until the reaction comes to a new position of equilibrium. How a reaction will change when a stress is applied can be explained and predicted. That is the topic of this section.

The force other than the ionic concentration gradient that determines the electrical potential difference in the sodium-potassium pump is the electrical charge difference across the membrane. This is also known as the membrane potential.

The sodium-potassium pump is a type of active transport that moves sodium ions out of the cell and potassium ions into the cell. This creates an ionic concentration gradient, with a higher concentration of sodium ions outside the cell and a higher concentration of potassium ions inside the cell. This gradient is one of the forces that determines the electrical potential difference across the membrane.

However, another important force is the electrical charge difference across the membrane. The sodium-potassium pump moves three sodium ions out of the cell for every two potassium ions it moves in. This creates a net charge difference, with more positive charges outside the cell and more negative charges inside the cell. This charge difference contributes to the membrane potential and is another important factor in determining the electrical potential difference across the membrane.

In summary, both the ionic concentration gradient and the electrical charge difference across the membrane determine the electrical potential difference in the sodium-potassium pump.

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