oxides of active metals, such as cao, react with water to form?

Answer:

1.08 x 10^24

Explanation:

The number of molecules in a given amount of a substance can be determined by using Avogadro's number, which is approximately 6.022 x 10^23 particles per mole.

To find the number of molecules in 1.8 moles of water, you would use the following calculation:

1.8 moles x 6.022 x 10^23 particles/mole = 1.0839 x 10^24 molecules

So there are about 1.08 x 10^24 molecules in 1.8 moles of water.

Answer:

B and C

Explanation:

Sulphuric acid reacts with lithium hydroxide to produce lithium sulphate and water

H2SO4 + 2LiOH ---› Li2SO4 + 2H2O

The process of triangulation to locate an epicenter are as follows.

What is triangulation?

Triangulation is a method used in surveying, navigation, and geography to determine the location of a point by measuring angles to it from known points at either end of a fixed baseline, rather than measuring distances to the point directly. This can be done by measuring angles to the point from two or more fixed locations, and then using trigonometry to calculate the position of the point.

Here is the general process of triangulation to locate an epicenter:

By following the above ways you can use the process of triangulation to locate an epicenter.

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There are 6.9253 x10²⁴ molecules in 11. 5 mol of H₂O

The total number of atoms or molecules in a sample can be calculated by multiplying the number of moles by the Avogadro constant. The formula is as follows:

number of molecule= moles x avogadro's number

One mole of material has 6.022x10² atoms, and equivalent volumes of various gases measured under the same conditions of temperature and pressure contain the same number of molecules.

number of molecule= moles x avogadro's number

number of molecule= 11. 5 mol x  6.022x10²³

number of molecule= 6.9253 x10²⁴

Therefore, there are 6.9253 x10²⁴ moleculesin 11. 5 mol of H₂O

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To find the molar mass of an unknown element/compound use the following steps:

Step 1: Using the chemical formula, calculate the number of atoms in each element in the compound.

Step 2: Multiply each element's atomic weight by the number of atoms in the compound.

Step 3: Total everything and assign a unit of measurement of grams/mole.

for eg: What is the molar mass of sodium carbonate (Na2CO3)?

Solution: Sodium carbonate contains two sodium atoms, one carbon atom, and three oxygen atoms. The atomic weight would be

Na : 2 x 23.0 = 46

C : 1 x 12.0 = 12

O : 3 x 16 = 48

When we add the total values, we get 106 (46 + 12 + 48).

As a result, Na2CO3 has a molar mass of 106 g/mole.

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the complete question is, how do you find the molar mass of an unknown element or compound?

A solution in equilibrium with an undissolved solute is a saturated solution.

A homogeneous mixture composed of two or more substances is called a solution.

In a solution, there are two primary components, which are termed as,

The minor component that is dissolved in a solution is known as the solute. The major component that dissolves the solute is known as the solvent.

At a given temperature and pressure, every solvent is capable of dissolving a particular amount of solute in it.

If a solution has dissolved as much as it is capable of dissolving, then the solution is known as a saturated solution.

Hence, a solution in equilibrium with an undissolved solute is known as a saturated solution.

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It is true that kettle sours can be produced by adding food-grade lactic acid in the kettle

Lactic acid is a naturally occurring organic acid that is produced during fermentation by bacteria such as Lactobacillus. It is commonly used in food and beverage production as a flavor enhancer, preservative, and pH control agent.

Lactic acid is known for its tart, sour taste and is commonly found in fermented dairy products like yogurt and sour cream, as well as in sour beers and pickled vegetables.

Kettle sours are a type of sour beer that are made by adding food-grade lactic acid to the wort (unfermented beer) while it is still in the kettle. This allows the beer to sour without the need for a long aging process, which is required for traditional sour beer styles such as lambics or Berliner Weisse.

By controlling the amount of lactic acid added and the time it is added, brewers can produce a range of sour beers with different levels of sourness, from mild to tart. The use of food-grade lactic acid in kettle sours is considered a safe and widely used brewing practice.

Therefore, It is true that kettle sours can be produced by adding food-grade lactic acid in the kettle

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The mass of Sodium Iodide (NaI) will react with 7.82 grams of Chlorine (Cl2)  16.49g.

given specifications:

7.82g is the mass of chlorine gas.

Unknown:

Weight in NaI = mass / molar mass

Solution:

The following is the reaction equation:

2NaI + Cl2 becomes 2NaCl + I2.

Find the quantity of moles belonging to the identified species in order to solve this issue;

Number of Cl2 moles = 7.82 / 71

Cl2 has a molar mass of 2(35.5) = 71g/mol.

The number of moles is 0.11 moles.

from the equation for a balanced reaction;

2 moles of NaI and 2 moles of Cl2 will react.

Additionally, 0.11 moles of Cl2 and 0.11 moles of NaI will react.

Mass of NaI  = 0.11 x 149.9 = 16.49g

The mass of Sodium Iodide (NaI) will react with 7.82 grams of Chlorine (Cl2)  16.49g

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Explanation:

Competition and predation are ecological relationships but are not symbiotic. Predation does not occur over a long period of time, and competition is an indirect interaction over resources.

Competition is most typically considered the interaction of individuals that vie for a common resource that is in limited supply, but more generally can be defined as the direct or indirect interaction of organisms that leads to a change in fitness when the organisms share the same resource.

In predation, one organism kills and consumes another. Predation provides energy to prolong the life and promote the reproduction of the organism that does the killing, the predator, to the detriment of the organism being consumed, the prey. Predation influences organisms at two ecological levels.

In a molecule of water, oxygen atoms have a higher value of electronegativity than the hydrogen atoms present in the said H2O molecule.

Electronegativity is a chemical property of elements or molecules  that describes the tendency of an atom or a functional group ( molecule, for example) to attract electrons toward itself. The electronegativity value of an atom is affected by both its atomic number (denoted by Z) and the distance that its valence shell electrons reside from the charged nuclei. Electronegativity serves as a way to quantitatively estimate the bond energy of a bond, and the sign and magnitude of a bond's chemical polarity, that characterizes a bond along the continuous scale from covalent to ionic bonding.

In a water molecule, oxygen is more electronegative than hydrogen as oxygen is a smaller molecule with a higher number of protons. Oxygen pulls bonded electrons towards itself and thus in return gets a slightly negative charge while both hydrogen atoms get a slightly positive charge.

The electronegativity value of oxygen is 3.5 while that of hydrogen is 2.1.

Thus, the answer to the question is Oxygen.

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Inorganic chemistry is the study of the remaining (i.e., non-carbon-containing) subset of chemicals, whereas organic chemistry is defined as the study of molecules containing carbon.

The characteristics and behaviour of inorganic compounds, which include metals, minerals, and organometallic compounds, are the focus of inorganic chemistry. Chemistry that does not have a carbon-hydrogen link, such as inorganic elements and compounds that are found naturally in the earth, is known as inorganic chemistry. Life cannot exist without inorganic substances like carbon dioxide, oxygen, minerals, and water. The study of carbon-containing molecules' structure, characteristics, content, reactions, and synthesis is known as organic chemistry. The majority of organic compounds are composed of carbon and hydrogen, however they can also contain a variety of additional elements (e.g., nitrogen, oxygen, halogens, phosphorus, silicon, sulfur).

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Answer: As new discoveries are made, existing theories are revised or replaced.

Dalton stated that atom is matter that can not be divided.

His "plum pudding" model (1904) suggested: the electrons are embedded in the positive charge.  

J. J. Thomson discovered the electron in 1897.  

According to Rutherford model of the atom:  

1) Atoms have their charge concentrated in a very small nucleus.  

2) Major space in an atom is empty.  

3) Atoms nucleus is surrounded by negatively charged particles called electrons.  

4) An atom is electrically neutral.

Explanation:

Answer:

2H2O have water = 2×2=4moles.

Explanation:

(⁠◕⁠ᴗ⁠◕⁠✿⁠)(⁠◕⁠ᴗ⁠◕⁠✿⁠)(⁠◕⁠ᴗ⁠◕⁠✿⁠)

The percent composition of phosphorus in magnesium phosphate is approximately 32.3%.

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Therefore, the mole fraction of methanol is 0.941. To calculate the mole fraction of methanol, you need to know the number of moles of methanol and glycerine present in the solution.

First, we need to calculate the number of moles of methanol in the solution. To do this, we use the molar mass of methanol (32.04 g/mol)

130g / 32.04g/mol = 4.05 moles

We also need to calculate the number of moles of glycerine in the solution. To do this, we use the molar mass of glycerine (92.09 g/mol)

23.5g / 92.09g/mol = 0.2555 moles

The mole fraction of a component is calculated by the number of moles of that component divided by the total number of moles in the solution.

Mole fraction of methanol = moles methanol / (moles methanol + moles glycerine)

= 4.05 moles / (4.05 moles + 0.2555 moles)

= 0.941

Therefore, the mole fraction of methanol is 0.941.

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100 Joules of kinetic energy will be produced by 50 kg of object.

The formula for kinetic energy is:

KE = 1/2 * m * v^2

where

KE = kinetic energy

m = mass of the object

v = velocity of the object

So, to find the kinetic energy of a 50 kg object moving at a velocity of 2 m/s:

KE = 1/2 * 50 kg * (2 m/s)^2

KE = 1/2 * 50 kg * 4 m^2/s^2

KE = 100 J (Joules)

So, the kinetic energy of the 50 kg object moving at a velocity of 2 m/s is 100 Joules.

It is worth noting that kinetic energy is a scalar quantity, meaning it does not have a direction.

It is also important to know that the kinetic energy of an object increases as the square of its velocity, so as the velocity increases, the kinetic energy increases rapidly.

In summary, kinetic energy is the energy an object possesses due to its motion, the formula to calculate kinetic energy is 1/2 * m * v^2, where m is the mass of the object and v is the velocity of the object. In this example, a 50 kg object moving at a velocity of 2 m/s has a kinetic energy of 100 Joules.

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[tex]CH_{4}[/tex], also known as methane, is a nonpolar molecule.

This can be seen in its molecular structure, which consists of four hydrogen atoms arranged symmetrically around a single carbon atom in a tetrahedral arrangement.

The four hydrogen atoms in methane have identical electronegativities, resulting in a uniform distribution of electrons around the carbon atom, making the molecule nonpolar.

[tex]CH_{4}[/tex] is a nonpolar molecule because its four bonded hydrogen atoms arrange themselves symmetrically around the central carbon atom, so that the positive and negative charges cancel each other out. This means that the molecule has no net dipole moment, making it nonpolar.

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changes in the Sun's magnetism produce a greater number of sunspots, more energy and cause solar eruptions of particles

The electrons stay in the electron cloud and do not fly off because of the stronger attraction to the proton.

In the electron cloud, the positive charge of the proton binds the electron from flying off since opposites attract. This allows the electrons to move around the nucleus of an atom. The nucleus is positively charged and the electrons that moves around the nucleus are negatively charged. so they attract each other. It is because the atom is so small. There are too many protons. some of the outer protons are loosely bound and more free to react with the electron. Most atoms do not have too many protons. so there is nothing for the electron to interact with. Therefore, each electron in a stable atom remains in its wavefunction shape.

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B:  [tex]C_{12} H_{26}[/tex] is expected to have the largest dispersion forces.

Dispersion force is a type of intermolecular force that acts between normally electrically symmetric atoms and molecules; that is, the electrons and atoms are symmetrically distributed with respect to the nucleus.

The strength of dispersion forces usually increases with the number of electrons in the atom or molecule. In the given case,  [tex]C_{12}H_{26}[/tex] contains a lot more electrons in comparison to [tex]C_{3} H_{8}[/tex],[tex]F_{2}[/tex], and [tex]BeCl_{2}[/tex]. Therefore, [tex]C_{12} H_{26}[/tex] is expected to have the largest dispersion forces.

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The container has a volume of 0.0628 L.

To convert mL (milliliters) to L (liters), we need to divide by 1000 since 1 L is equivalent to 1000 mL.

Therefore, the volume of the container in liters can be calculated as follows:

Volume of container = Volume of water in mL / 1000

Volume of container = 62.8 / 1000

Volume of container = 0.0628 L

Therefore, the volume of the container is 0.0628 L.

It is important to note that when conducting experiments, it is essential to accurately measure the volume of the container as it directly impacts the results of the experiment.

In this case, knowing the volume of the container is crucial as it is one of the variables required for the experiment. Any error or imprecision in the measurement of the volume can lead to inaccurate results and potentially affect the outcome of the experiment.

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Answer: The container has a volume of 0.0628 L.

Explanation:

In metals, the valence electrons are considered to be continually moving from one atom to another and are not associated with any specific pair of atoms.

Metallic solids are made up of tightly packed atoms. In most cases, each metal atom's outermost electron shell overlaps with a large number of neighboring atoms.

As a result, valence electrons are constantly moving from one atom to the next and are not associated with any specific pair of atoms. In short, unlike covalently bonded substances, valence electrons in metals are nonlocalized, allowing them to roam relatively freely throughout the crystal.

The atoms left behind by the electrons become positive ions, and their interaction with valence electrons produces the coherent and consistent or binding thrust that holds the metallic particle next to each other.

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A nebula can form either an average star, or a massive star, that is about the size of our sun, or a supergiant star which can be over 3 times as big as our sun!

Stars are giant spheres of hot gas, primarily composed of hydrogen and helium, that generate energy through nuclear fusion reactions. They are found in vast numbers throughout the universe and are the building blocks of galaxies.

A star's energy is generated by nuclear fusion reactions that take place in its core. This energy is responsible for the star's brightness and for the formation of the various elements in the star.

Stars come in different sizes, colors, and temperatures. The size of a star is described by its mass and radius, the color of a star is determined by its temperature, with the hottest stars being blue and the coolest stars being red. The temperature of a star also determines its luminosity, that is, how bright it appears in the night sky.

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The equilibrium constant is 1.8 × 10⁻⁵ . The equilibrium equation below shows  NH₄OH +H ⇌NH₄+H₂O

Calculating the equation:

Kw= 1 × 10⁻¹⁴

K= K× K` = 1.8× 10⁻⁵

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The kinetic energy of a boy with a mass of 50 kg driving a bike at a velocity of 2 m/s is 20 J (Joules).

The kinetic energy of an object is the energy it possesses due to its motion. It is calculated by using the formula KE = 0.5 * m * v^2, where m is the mass of the object in kilograms and v is its velocity in meters per second.

So, for a boy of mass 50 kg driving a bike with a velocity of 2 m/s, the kinetic energy can be calculated as follows:

KE = 1/2 * 50 kg * (2 m/s)^2

KE = 20 J

It's worth noting that kinetic energy is a scalar quantity and has no direction, so the velocity's direction does not affect the calculation. Additionally, the unit of kinetic energy is Joule (J) which is the SI unit of energy. Also, it's worth noting that this is a very small amount of energy, and it's unlikely that the boy would be able to do much work with it.

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Answer:

basalt

Explanation:

it’s rough on skin

There are a few methods through we can extract non-polar from the products (i) liquid liquid extraction (ii) solid-liquid extraction

Liquid-liquid extraction is a method for removing non-polar chemical compounds from molecules. This entails mixing the mixture containing the drug to be extracted with a non-polar solvent, such as hexane or ether. The material and the non-polar solvent will separate into layers that can be separated and collected.

The addition of a non-polar substance, such as silica gel, to the mixture will cause the non-polar organic substance to be adsorbed while the other ingredients stay in the liquid phase. This approach is known as solid-liquid extraction. The desired ingredient can then be removed from the solid by washing it with a non-polar solvent.

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Compare between a static discharge and a current flowing via a circuit, A voltage source provides a constant current to a circuit. In a static discharge, the transfer of charge happens very quickly and discontinuously.

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To find out how many moles of gas a container can hold, we can use the ideal gas law, which states that PV = nRT, where P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant, and T is the temperature in Kelvin.

We know that P = 1.00 atm, V = 0.325 L, and T = 293 K. We also know that the ideal gas constant R = 8.314 J/mol·K.

We can use this information to find the number of moles n in the container:

n = (PV) / (RT)

n = (1.00 atm * 0.325 L) / (8.314 J/mol·K * 293 K)

n = 0.0094 mol

So, the container can hold 0.0094 moles of gas.

Gradually graduated cylinders are available in a variety of sizes, or volume capacities, and, like a measuring cup, are used to determine volume by pouring liquid to the cylinder and comparing the liquid level to the graduated scale.

The volume that was measured is the same as the amount of liquid that was put inside the cylinder.

Similar to weighing, determining the volume of a liquid is a fundamental and common lab procedure. Both a graduated cylinder and a burette are commonly used to measure liquid volume.

A graded cylinder is, as its name suggests, a cylindrical glass or plastic tube that is sealed at one end and has a calibrated scale etched (or marked) on its exterior.

Gradually graduated cylinders are available in a variety of sizes, or volume capacities, and, like a measuring cup, are used to determine volume by pouring liquid to the cylinder and comparing the liquid level to the graduated scale.

The volume that was measured is the same as the amount of liquid that was put inside the cylinder. As a result, the graduated cylinder and similar apparatus (volumetric flasks, Erlenmeyer flasks, and beakers) are categorized as to-contain (TC) apparatus.

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