What law says the total amount of
substance at the beginning of a
reaction must match the amount of
substance at the end of the reaction?
A. Law of Conservation of Energy
B. Law of Conservation of Moles
C. Law of Conservation of Heat
D. Law of Conservation of Mass

If you're attempting to synthesize 2 benzyl pentanoic acid from acetoacetic ester, keep in mind that you can do so fairly quickly by following these simplified instructions:

From its pungent free scent to its solid state at temperatures ranging from 118 120°C, acetoacetic ester (better known as ethyl acetoacetate) offers significant value for those working within organic synthesis.

As one of many potent ketones utilized by researchers around the globe its unique properties make it ideal for building complex molecules essential for modern medicine and more.

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If it flattens out, it is malleable is the prediction about the material must be true.

When a solid material is struck with a hammer, the solid material flattens and it can malleable. Malleable is the ability of substance that is able to be hammered or pressed into shape without breaking into pieces or cracking. Metals are malleable in which the metal can be turn into many shapes without breaking into pieces. People make different things by folding the metal into many shapes due to its malleable characteristics. If this property is not present in metals we can't make a lot of objects very easily. So this property of metal has very high importance for us.

So we can conclude that If it flattens out, it is malleable is the prediction about the material must be true.

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Answer:

the answer is d

Answer:

D

Explanation:

Because they are many different types of chemicals some are dangerous but some are applicable to use . chemicals help to wash germs away so we can live in a healthy environment.

Both changing particle size and adding a catalyst can influence the reaction rate, while adding heat specifically affects the rate by increasing the kinetic energy of the reactant particles.

The correct option are A and C.

Both changing particle size and adding a catalyst can alter the reaction rate.

Changing particle size can affect the reaction rate because it influences the surface area available for the reactant particles to interact. Smaller particle sizes result in a larger surface area, increasing the frequency of collisions between particles and accelerating the reaction. Conversely, larger particle sizes reduce the surface area, leading to fewer collision events and slower reaction rates.

Adding heat can also alter the reaction rate. Increasing the temperature provides more thermal energy to the reactant particles, causing them to move faster and collide with greater energy. This enhanced kinetic energy leads to more successful collisions and an increased reaction rate.

Adding a catalyst can significantly affect the reaction rate. A catalyst provides an alternative reaction pathway with lower activation energy, enabling the reaction to occur more easily. By lowering the energy barrier, a catalyst increases the rate of reaction without being consumed or permanently altered in the process.

The correct option are A and C.

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The relation between pressure ,temperature and volume of gas is called Combined gas law.

Given:

P1V1 /T1 = P2V2/T2

at constant temperature T1 = T2

therefore P1V1 = P2V2 leading to

P is indirectly proportinal to V

P ∝1/v

The vapor pressure of the solution at 30°C is 0.9676781. The pressure that a vapor exerts on its condensed phases (solid or liquid) in a closed system at a specific temperature is known as vapor pressure.

The pressure of the solvent above the solution is known as the vapour pressure of a solution. Temperature, ambient pressure, and solute concentration all have an impact on a solution's vapour pressure. A manometer or a barometer can be used to determine a solution's vapour pressure. When a liquid is contained in a closed container, its molecules frequently crash into the walls of the container. Due to these collisions, the container's walls experience pressure equal to the liquid's vapour pressure.

Solution of P = (0.9677 x 31.8 mmHg)

P solution = 30.8 mmHg

X Solvent = 34.63588 mol/1.156 + 34.635

X Solvent = 0.9676781

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Answer:

Explanation:

i dont kow

The complete ionic equation and the net ionic equation for the reaction of aqueous ammonia and aluminum nitrate is written as follows:

\(Al^{3+} (aq)+3(NO_{3})^{-}(aq)+3NH_{4}^{+} (aq) + OH^{-}(aq)\rightarrow Al(OH)_{3}(s)+3NH_{4}^{+}(aq)+NO_{3}^{-}(aq)\)

\(Al^{3+}(aq)+ OH^{-}(aq)\rightarrow Al(OH)_{3}(s)\)

In an ionic equation all the ions are charges are balanced to the proper stoichiometric ratio. The states of each species have to be written in the brackets.

The reaction of aluminum nitrate and aqueous ammonia is written as follows:

\(Al(NO_{3})_{3}(aq) + 3NH_{4}OH(aq)\rightarrow Al(OH)_{3}(s) +3NH_{4}NO_{3}(aq)\)

The complete ionic equation is written below:

\(Al^{3+} (aq)+3(NO_{3})^{-}(aq)+3NH_{4}^{+} (aq) + OH^{-}(aq)\rightarrow Al(OH)_{3}(s)+3NH_{4}^{+}(aq)+NO_{3}^{-}(aq)\)

From this complete ionic equation the net ionic equation can be written by cancelling same species from both side as below:

\(Al^{3+}(aq)+ OH^{-}(aq)\rightarrow Al(OH)_{3}(s)\)

Therefore, the net product aluminum hydroxide is precipitated and the net ionic equation is written as above.

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An element's electronegativity determines whether it is ionic or non-ionic. Fluorine has the most electronegativity while iodine has the lowest, which means that the Cs I ionic bond's power of attraction is at its lowest, allowing for the largest possible distance between their molecules.

The attracting and repellent forces that develop between the molecules of a substance are referred to as intermolecular forces (IMF), which is sometimes shortened. These forces act as a bridge between the individual molecules of a substance. Intermolecular forces are primarily responsible for the physical and chemical properties of matter.

The following are the four main intermolecular forces: Van der Waals dipole-dipole interactions < Van der Waals dispersion forces <Ionic bonds <Hydrogen bonds .

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Answer:

Need choices

Explanation:

Your question suggest that there are answers to choose from. Need those to complete the question.

Answer:

it is 0.0136 dkl

Answer:Matter is defined as anything that has mass and takes up space (it has volume). ... Volume is the amount of space something occupies. Words such as big, little, long, or short are used to describe volumes.

Explanation:

Answer:

Sp3

Explanation:

According to the question, atom 1 is an N atom bonded to 2 C atoms and 1 H atom through single bonds.

Whenever nitrogen is bonded to three atoms via single bonds (in this case two carbon atoms and one hydrogen atom) the nitrogen atom is sp3 hybridized and in tetrahedral geometry. The lone pair on nitrogen atom occupies one of the hybrid sp3 orbitals.

Cyanazine is used as an herbicide to control the growth of weeds and annual grasses. The herbicide has been phased out due to increased toxicity to the environment and humans.

The hybridization of the molecule is sp³.

The given information in the question suggests that Nitrogen (atom 1) to two Carbon atoms and single bonded to 1 hydrogen atom.

The nitrogen is bonded with three single bonds, two with carbon and one with a hydrogen bond.

Based on the given data, the hybridization of the molecule will be sp³ and will have tetrahedral geometry. The lone pair present on the nitrogen atom will occupy one of the hybrid sp³ orbitals.

Therefore, the sp3 hybridization of the cyanazine molecule will exist.

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The chlorine and sodium atoms in this configuration form a crystal lattice, a crystal structure made up of powerful ionic bonds.

The symmetrical, three-dimensional structural configuration of points representing atoms, ions, or molecules that make up a crystalline solid is known as the crystal lattice.

It can be characterized as the spatial geometrical arrangement of the atoms, ions, or molecules that make up the crystalline solid.

The cubic lattice of rock salt, NaCl, which has half of its lattice points occupied by sodium atoms and half by chlorine atoms, is one of the most prevalent structures.

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If it took 412.5 J of heat to raise the temperature of 24.6 g of a substance from 14.5°C to 52.6°C, the specific heat of the substance is 0.44 J/g°C.

The specific heat of a substance can be calculated by using the following formula:

Q = m × c × ∆T

Where;

412.5 = 24.6 × c × (52.6 - 14.5)

412.5 = 937.26c

c = 412.5/937.26

c = 0.44 J/g°C

Therefore, If it took 412.5 J of heat to raise the temperature of 24.6 g of a substance from 14.5°C to 52.6°C, the specific heat of the substance is 0.44 J/g°C.

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Answer:

\(M=2.24M\)

Explanation:

Hello!

In this case, since the molarity and volume of the solutions are given, we are able to compute the moles of chloride ions as they are present in NaCl only:

\(n_{Cl^-}=3.00L*3.74\frac{molNaCl}{L}*\frac{1molCl^-}{1molNaCl} =11.22molCl^-\)

Next, since the mixing of solution A and B lead to a volume of 5.00 L, the concentration of chloride ions turns out:

\(M=\frac{11.22mol}{5.00L}=2.24M\)

Best regards!

Answer: Hello, There! your Answer is Below

Option A Salt

Explanation:

Salt is A Chemical Used For Varites of Purposes, So It's not Part of Matter.

Atom being the Smallest Part of  Molecule And ion Are Charge  Which is  Part of Matter.

Hope this helps!!

Have a great day!!!

The relative molecular mass of hydrated Copper (II) tetraoxosulphate (VI) CuSO4.5H₂O is 249.

Molecular mass is a measure of the total mass of one mole of a substance, which is defined as the mass of the substance divided by the number of molecules it contains. It is typically expressed in g/mol and is also known as molar mass. Molecular mass is determined by the types and number of atoms that compose a molecule, and is an important factor in understanding the properties of a substance.

This is calculated by adding the atomic masses of all the atoms present in the compound.
The atomic mass of copper is 64, sulphur is 32, oxygen is 16, and hydrogen is 1.
So, the relative molecular mass of hydrated Copper (II) tetraoxosulphate (VI) CuSO4.5H₂O is 64 + 32 + (16*4.5) + (1*5) = 249.

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Answer:

B

Explanation:

Fe3O4(s) + CO(g) →FeO(s) + CO2(g)

Left side

Fe =3

O = 5

C = 1

Right side

Fe =1

O = 3

C = 1

Balance by finding common denominator

We'll make Fe 3 on the left side

Fe3O4(s) + CO(g) →3FeO(s) + CO2(g)

Left side

Fe =3

O = 5

C = 1

Right side

Fe =3

O = 5

C = 1

Answer:

1. B

2.B

3.B

4.C

5.C

Explanation:

I hope this help you

According to Boyle's law, the pressure in the acetylene tank is 268.33 atmospheres.

Boyle's law is an experimental gas law which describes how the pressure of the gas decreases as the volume increases. It's statement can be stated as, the absolute pressure which is exerted by a given mass of an ideal gas is inversely proportional to its volume provided temperature and amount of gas remains unchanged.

Mathematically, it can be stated as,

P∝1/V or PV=K. The equation states that the product of of pressure and volume is constant for a given mass of gas and the equation holds true as long as temperature is maintained constant.

In the given problem , by substituting values in formula P₁V₁=P₂V₂, P₂=115×7/3=268.33 atmospheres.

Hence, the pressure in acetylene tank is 268.33 atmospheres.

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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.

The question was incomplete. find the full content below:

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 temperature of the gas when the volume increase from 0.67 L to 1.37 L is  471.29 °C.

Temperature is the hotness or coldness of a thing or place.

To calculate the temperature in Celsius when the volume increase, we use the formula below.

Formula:

Where:

From the questuion,

Given:

Substitute these values into equation 1

Hence, the final temperature of the gas is 471.29 °C.

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18.4 × 10^(24) water molecules are contained in a 0.50L bottle of water.

Given,

Density of water = 1.00 g/mL

Volume of water = 0.50L = 500 ml

We can calculate the mass of water.

As we know that,

Density = mass/ volume

By substituting the values, we get

1 = Mass / 500

Mass = 500 g.

Now, we know

Molar mass of water = 18 g

Mass of water = 500g

We will calculate the moles of water

Mole = given mass / molar mass

= 500/18 = 27.7 moles

As we know that,

1 mole = 6.673 × 10^(23) molecules

So, 27.7 moles contain = 6.673 × 27.7 × 10^(23)

= 18.4 × 10^(24) molecules

Thus, we concluded that 18.4 × 10^(24) water molecules are contained in a 0.50L bottle of water.

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Answer:

D

Explanation:

Answer:

kinetic

Explanation:

The empirical formula of the compound is C₂H₁₆S₂N₃O.

The moles of each element is as follows::

For CO₂:

Carbon (C) has a molar mass of 12.01 g/mol.

Oxygen (O) has a molar mass of 16.00 g/mol.

Moles of C in CO₂ = 2.08 g / 12.01 g/mol = 0.173 moles

Moles of O in CO₂ = 2.08 g / 16.00 g/mol = 0.130 moles

For H₂O:

Hydrogen (H) has a molar mass of 1.01 g/mol.

Oxygen (O) has a molar mass of 16.00 g/mol.

Moles of H in H₂O = 1.28 g / 1.01 g/mol = 1.27 moles

Moles of O in H₂O = 1.28 g / 16.00 g/mol = 0.080 moles

For SO₃:

Sulfur (S) has a molar mass of 32.06 g/mol.

Oxygen (O) has a molar mass of 16.00 g/mol.

Moles of S in SO₃ = 4.77 g / 32.06 g/mol = 0.149 moles

Moles of O in SO₃ = 4.77 g / 16.00 g/mol = 0.298 moles

For HNO₃:

Hydrogen (H) has a molar mass of 1.01 g/mol.

Nitrogen (N) has a molar mass of 14.01 g/mol.

Oxygen (O) has a molar mass of 16.00 g/mol.

Moles of H in HNO₃ = 3.48 g / 1.01 g/mol = 3.45 moles

Moles of N in HNO₃ = 3.48 g / 14.01 g/mol = 0.248 moles

Moles of O in HNO₃ = 3.48 g / 16.00 g/mol = 0.217 moles

The simplest whole-number ratio of the elements will be:

Carbon: 0.173 moles / 0.080 moles ≈ 2.16

Hydrogen: 1.27 moles / 0.080 moles ≈ 15.88

Sulfur: 0.149 moles / 0.080 moles ≈ 1.86

Nitrogen: 0.248 moles / 0.080 moles ≈ 3.10

Oxygen: 0.080 moles / 0.080 moles = 1

Therefore, the empirical formula is C₂H₁₆S₂N₃O.

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Answer:

fossils come from way back they can be left from dinosaurs and other species  

Explanation:

Answer:

Using fossils, you can learn about extinct animals and plants, that's one. Two, you can learn about evolutionary traits and the fact that evolution exists.

Explanation:

The mass in grams of  AgCl is produced when 4.22 g of AgNO3 react with 7.73 g of AlCl3 is 11.9. The correct option is d.

Mass is the quantity of matter in a physical body. The Si unit os mass is grams and kilograms and is denoted by m.

1. calculate the moles

Mass is 4.22 g

Molar mass is 169.87

AgNO3 = 4.22 g/ 169.87 = 0.025

AlCl3

Mass is 7.73 g

Molar mass is 133.34

7.73 g / 133.34 = 0.0579

0.0579 + 0.025 =  0.0829

Mass will be 4.22 g + 7.73 g = 11.95

Thus, the correct option is d. 11.95.

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The question is incomplete. Your most probably complete question is given below:

a. 4.22

b. 17.6

c. 3.56

d. 11.9

e. 22.9

The ratio between N2 and the product is 1:2.

The ratio between H2 and the product is 3:2.

These ratios are deducted from the stoichiometry coefficients, which indicate the molar quantity of each molecule.

From these ratios, we can deduct the answer most contain greater moles for H2 than for N2 because the hydrogen molecule represents more product, this leaves us with two possible options: a and b.

At last, if we use 2 moles of N2 and 4 moles of H2, we would get the greatest amount of product, and we are using the proper ratio indicated by the chemical equation.

Therefore, the answer is a.

NAFTA provides enormous benefits to the United States, Canada, and Mexico by facilitating cross-border trade, job creation, and economic growth. However, it has also created political pressure for government subsidies to the United States, where businesses and industries are struggling to compete with low-cost Mexican producers.

The North American Free Trade Agreement (NAFTA) provides for free trade between the United States, Canada, and Mexico, which is a landmark trade agreement in North America. NAFTA has expanded cross-border trade by lowering tariffs and trade barriers among the three countries, making it easier for goods and services to move across the borders.NAFTA provides enormous benefits, including increased trade, job creation, lower costs for goods, and services.

It has led to an increase in foreign investment, cross-border trade, and job creation. NAFTA's liberalization has contributed to increased cross-border integration, including trade in goods and services, and financial integration among the three countries, which has resulted in a more prosperous North American economy.However, NAFTA has created political pressure for government subsidies to the United States, where businesses and industries are struggling to compete with low-cost Mexican producers.

As a result, many industries and labor groups in the United States have called for the imposition of import barriers and other forms of protectionism to protect their interests. They have also criticized the agreement for its impact on domestic industries and jobs.The government subsidies have led to the loss of jobs in many domestic industries, such as the automotive and steel industries. The NAFTA's provisions have created competition between the two countries, which has driven down prices and led to a reduction in the number of jobs in certain sectors of the economy.

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