How many grams are 4.78x10*21 atoms of aluminum?

The iron oxide has 69.9

The temperature of the reaction should be decreased

This change in temperature would make the equilibrium to shift to the right.

The Le Chatelier's principle, commonly referred to as the Le Chatelier's principle of equilibrium, is a chemical principle that describes how an equilibrium system reacts to environmental changes.

According to this theory, when an equilibrium system is exposed to an outside force, it will respond in a way that partially offsets the imposed change and restore equilibrium.

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Answer:

The brain

Explanation:

With all those instructions the body recqures to respond to it must be so

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Answer:

Scientists believe that the solar system was formed when a cloud of gas and dust in space was disturbed

Explanation: I looked It Up on Google

Answer:

acetone, (CH3)2CO cyclohexane are the compound that possesses a permanent dipole

Explanation:

Permanent dipole describes the partial charge separation that can occur within a molecule along with the bond dat form between 2 different atoms

Ionic compounds contain both cations and anions in a ratio that results in no net electrical charge

Answer:

Explanation:

The pH of 0.02 M hydrochloric acid is approximately 1.7.

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For trace analysis, X-ray spectrography is more suitable as it is more sensitive technique and gives finer emission spectrum.

Emission spectrum is defined as a spectrum of a chemical compound or substance composed of frequencies of electromagnetic radiation. Radiations which are emitted while electron make transition from higher to lower energy level.

Energy of photon is equal to the difference between the two energy states . There are many possible electronic transitions in an atom and every transition has a specific wavelength.

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Answer:

Mole fraction of KCl = 0.4056

Explanation:

We'll begin by calculating the number of mole of each compound. This can be obtained as follow:

For NaCl:

Mass NaCl = 0.564 g

Molar mass of NaCl = 58.44 g/mol

Mole of NaCl =?

Mole = mass /Molar mass

Mole of NaCl = 0.564 / 58.44

Mole of NaCl = 0.0097 mole

For KCl:

Mass KCl = 1.52 g

Molar mass of KCl = 74.55 g/mol

Mole of KCl =?

Mole = mass /Molar mass

Mole of KCl = 1.52 / 74.55

Mole of KCl = 0.0204 mole

For LiCl:

Mass LiCl = 0.857 g

Molar mass of LiCl = 42.39 g/mol

Mole of LiCl =?

Mole = mass /Molar mass

Mole of LiCl = 0.857 / 42.39

Mole of LiCl = 0.0202 mole

Next, we shall determine the total mole in the mixture. This can be obtained as follow:

Mole of NaCl = 0.0097 mole

Mole of KCl = 0.0204 mole

Mole of LiCl = 0.0202 mole

Total mole =?

Total mole = Mole of NaCl + Mole of KCl + Mole of LiCl

Total mole = 0.0097 + 0.0204 + 0.0202

Total mole = 0.0503 mole

Finally, we shall determine the mole fraction of KCl in the mixture. This can be obtained as follow:

Mole of KCl = 0.0204 mole

Total mole = 0.0503 mole

Mole fraction of KCl =?

Mole fraction of KCl = Mole of KCl /Total mole

Mole fraction of KCl = 0.0204 / 0.0503

Mole fraction of KCl = 0.4056

Answer:

.4 is correct

Explanation:

The mass of the asteroid is C. 1.2 x \(10^{12}\) Kg

To find the mass of the other asteroid, we can rearrange the equation for the gravitational force between two objects:

F = (G * m1 * m2) / \(r^{2}\)

where F is the force of gravity, G is the gravitational constant, m1 and m2 are the masses of the two asteroids, and r is the distance between them.

Given that the distance between the asteroids is 75000 m, the force of gravity between them is 1.14 N, and one asteroid has a mass of 8 x \(10^{7}\) kg, we can substitute these values into the equation and solve for the mass of the other asteroid (m2):

1.14 N = (6.67430 × \(10^{-11}\) N \(m^{2}\)/\(Kg^{2}\) * 8 x \(10^{7}\) kg * \(m2\)) / \((75000 m)^{2}\)

Simplifying and solving the equation, we find that the mass of the other asteroid (m2) is approximately 1.2 x \(10^{12}\) kg. Therefore, Option C is correct.

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Two asteroids are 75000 m apart one has a mass of 8 x \(10^{7}\) kg if the force of gravity between them is 1.14 what is the mass of the asteroid

A. 3.4 x \(10^{11}\) kg

B. 8.3 x \(10^{12}\) kg

C. 1.2 x \(10^{12}\) kg

D. 1.2 x \(10^{10}\) kg

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The features of all the resonance forms of a molecule or ion have in common is atoms present, number of electrons, net charge on the molecules or ion and arrangement of atoms.

Resonance is defined as a phenomenon that occurs when the matching vibrations of another object increases the amplitude of an objects oscillation.

There are basically five types of resonance

Resonance is most important because it provide much more realistic view of the shape of a molecule.

Thus, the features of all the resonance forms of a molecule or ion have in common is atoms present, number of electrons, net charge on the molecules or ion and arrangement of atoms.

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Foods that we eat contains carbohydrates, proteins and lipids that provide chemical energy. This chemical energy is eventually turned into thermal energy, kinetic energy and other forms of chemical energy.

The major constituents of food are carbohydrates, proteins and lipids.  These serve as the fuel for the proper functioning of the body. The breakdown of these molecules inside our body by the process of digestion and transportation into the bloodstream helps in transforming the chemical energy stored in foods to kinetic, thermal and other forms of energy.

As a result of this transformation, human beings feel warm, can move and can perform their day-to-day activities.

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Answer:

164.67 grams of product FeCl₃ are produced from 56.7 grams of iron and sufficient chlorine.

Explanation:

The balanced reaction is:

2 Fe (s) + 3 Cl₂ (g) ⇒ 2 FeCl₃ (s)

By stoichiometry of reaction (that is, the relationship between the amount of reagents and products in a chemical reaction) the following amounts of reagents and product participate in the reaction:

Being:

the molar mass of the compounds participating in the reaction is:

Then, by stoichiometry of the reaction, the following mass amounts of the compounds participate:

Then you can apply the following rule of three: if 111.7 grams of Fe produce 324.4 grams of FeCl₃, 56.7 grams of Fe, how much mass of FeCl₃ will it form?

\(mass of FeCl_{3} =\frac{56.7 grams of Fe*324.4 grams of FeCl_{3} }{111.7 grams of Fe}\)

mass of FeCl₃= 164.67 grams

164.67 grams of product FeCl₃ are produced from 56.7 grams of iron and sufficient chlorine.

Answer:

Br-CH2-CH(CH3)2-C(Cl)H-CH(CH3)2-CHO

Explanation:

The molecule has a total of 14 carbon atoms, 13 hydrogen atoms, and 1 bromine atom. The carbon atoms are arranged in a chain with a methyl group attached to the second carbon atom, a chlorine atom attached to the third carbon atom, and two methyl groups attached to the fourth carbon atom. The fifth carbon atom has a carbonyl group attached to it.

The molecule is an aldehyde, which means that it has a carbonyl group (C=O) at the end of the chain. The carbonyl group is polar, and the oxygen atom has a partial negative charge. The hydrogen atom has a partial positive charge. This polarity makes the aldehyde group susceptible to nucleophilic attack.

The bromine and chlorine atoms are both electrophilic, which means that they have a partial positive charge. This makes them susceptible to nucleophilic attack.

The methyl groups are non-polar and do not have any significant reactivity.

The molecule is a chiral molecule, which means that it has a mirror image that is not superimposable on itself. This is because the carbon atom with the carbonyl group is attached to four different groups.

The molecule is a liquid at room temperature and has a strong odor. It is used in a variety of products, including perfumes, flavorings, and plastics.

Answer:

hfghfhjcbnggf

Explanation:

layer1

layer 2

Answer:

Although there are many specific types of energy, the two major forms are Kinetic Energy and Potential Energy. Kinetic energy is the energy in moving objects or mass. Examples include mechanical energy, electrical energy etc.

Explanation:

Examples of these are: light energy, heat energy, mechanical energy, gravitational energy, electrical energy, sound energy, chemical energy, nuclear or atomic energy and so on. Each form can be converted or changed into the other forms. ... Kinetic energy is the energy in moving objects or mass.

Answer:D, HBr

Explanation:

Answer:

D. HBr because divide the moles of the substances given in the question by the co-efficient in the equation. Smallest quotient is the limiting reactant

Answer:

Explanation:

The new volume can be found by using the formula for Boyle's law which is

\(P_1V_1 = P_2V_2\)

where

P1 is the initial pressure

P2 is the final pressure

V1 is the initial volume

V2 is the final volume

Since we are finding the new volume

\(V_2 = \frac{P_1V_1}{P_2} \\\)

So we have

\(V_2 = \frac{5 \times 40}{1} \\ = 5 \times 40\)

We have the final answer as

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The partial pressure of the nitrogen gas is 10 atm.

According to the Dalton's law, when we have a mixture of gases, the partial pressure of the gas is the pressure of one of the gases that we find in the system. Thus the total pressure of the system is the sum of all the partial pressures of all the gases.

We have the following information;

Total pressure of the gas =  40 atm

Total number of moles = moles of nitrogen +  moles of oxygen = 15 mols + 5 mols

= 20 moles

Mole fraction of nitrogen gas = 5 moles

We now have;

Mole fraction * Total number of moles

= 5 moles/20 moles * 40 atm

= 10 atm

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Answer:

neon is about five times more massive than helium.

Explanation:

got this one right lol

Answer: what?

Explanation:

Answer: Huh?

Explanation:

Considering the definition of STP conditions and Avogadro's number, the number of molecules of gas present in 2.24 L is 6.023×10²² molecules.

The STP conditions refer to the standard temperature and pressure. Pressure values at 1 atmosphere and temperature at 0 ° C are used and are reference values for gases. And in these conditions 1 mole of any gas occupies an approximate volume of 22.4 liters.

Avogadro's Number or Avogadro's Constant is called the number of particles that make up a substance (usually atoms or molecules) and that can be found in the amount of one mole of said substance. Its value is 6.023×10²³ particles per mole. Avogadro's number applies to any substance.

At STP, 2.24 L of carbon dioxide gas is collected. So, you can apply the following rule of three: if by definition of STP conditions 22.4 L are occupied by 1 mole of carbon dioxide gas, 2.24 L are occupied by how many moles of carbon dioxide gas?

\(amount of moles of carbon dioxide gas=\frac{2.24 Lx1 mole}{22.4 L}\)

amount of moles of carbon dioxide gas= 0.1 moles

Finally, 0.1 moles of carbon dioxide gas are collected.

Then you can apply the following rule of three, considering the Avogadro's number:  If 1 mole of carbon dioxide gas contains 6.023×10²³  molecules, 0.1 mole of carbon dioxide gas contains how many molecules?

amount of molecules of carbon dioxide gas= (6.023×10²³ molecules × 0.1 moles)÷1 mole

amount of molecules of carbon dioxide gas=6.023×10²² molecules

Finally, the number of molecules of gas present in 2.24 L is 6.023×10²² molecules.

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The specific gravity for liquid X is 0.890.

First, calculate the mass of the water.

Mass of water = mass of pycnometer filled with water - mass of pycnometer
    = 45.021 - 25.428
    = 19.593 g.

Then we calculate the mass of liquid X.

Mass of X = mass of pycnometer filled with X - mass of pycnometer
    = 42.874 - 25.428
    = 17.446 g.

Once we found out the mass of liquid X, we can calculate its specific gravity with the following formula:

Specific gravity = mass of X / mass of water
    = 17.446 g / 19.593 g
    = 0.890.

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Explanation:

a)Take percentages and divide by mole wt ( from periodic table) of the corresponding element

          C     14.25 / 12            = 1.1875

          O     56.93 / 15.99     = 3.56

          Mg   28.83/24.3        = 1.186        Divide by the smallest number

                        C 1.1875/1.186      = 1

                         O 3.56 / 1.186     = 3

                         Mg  1.186 / 1.186 =  1

C O3  Mg         commonly written as Mg CO3   ( magnesium carbonate)

Answer

(2) Chemical energy is converted to electrical energy.

Explanation

A voltaic cell is an electrochemical cell that uses a chemical reaction to produce electrical energy. In a voltaic cell, the anode is an electrode where oxidation occurs and the cathode is an electrode where reduction occurs.

Therefore, the process that occurs in an operating voltaic cell is:

(2) Chemical energy is converted to electrical energy.

Answer:

Hey there can you post the complete question ,i cannot find any element

Answer:

Explanation:

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