Upon completing of the following reaction, one cools down the solution, What's the role of cooling?

CuCl2(aq)+Cu(s)=2CuCl(s)

Answer :

Part 1: The molar mass of \(CuCO_3.Cu(OH)_2\) is 222 g/mol

Part 2: The mass of \(H_2O\) and \(CO_2\) is 18 g and 44 g respectively.

Explanation :

Part 1:

As we know that:

Atomic mass of copper, Cu = 64 g/mol

Atomic mass of carbon, C = 12 g/mol

Atomic mass of oxygen, O = 16 g/mol

Atomic mass of hydrogen, H = 1 g/mol

And we know that:

Molar mass of \(CuCO_3.Cu(OH)_2\) = (2 × Atomic mass of Cu) + Atomic mass of C + (5 × Atomic mass of O) + (2 × Atomic mass of H)

Molar mass of \(CuCO_3.Cu(OH)_2\) = (2 × 64) + 12 + (5 × 16) + (2 × 1)

Molar mass of \(CuCO_3.Cu(OH)_2\) = 128 + 12 + 80 + 2

Molar mass of \(CuCO_3.Cu(OH)_2\) = 222 g/mol

Part 2:

The balanced chemical reaction is:

\(CuCO_3.Cu(OH)_2(s)\rightarrow 2CuO(s)+H_2O(g)+CO_2(g)\)

From the balanced chemical reaction we conclude that:

1 mole of \(CuCO_3.Cu(OH)_2\) reacts to give 1 mole of \(H_2O\) and 1 mole of \(CO_2\)

Now we have to determine the mass of \(H_2O\) and \(CO_2\).

Mass of \(H_2O\) = Moles of

Molar mas of \(H_2O\) = 18 /mol

Mass of \(H_2O\) = 1 mol × 18 g/mol = 18 g

And,

Mass of \(CO_2\) = Moles of

Molar mas of \(CO_2\) = 44 /mol

Mass of \(CO_2\) = 1 mol × 44 g/mol = 44 g

Therefore, the mass of \(H_2O\) and \(CO_2\) is 18 g and 44 g respectively.

The molar mass of malachite has been 221.092 grams. The mass of water formed by the decomposition of 1 mole of malachite is 18 grams, and carbon dioxide has been 44 grams.

The molar mass has been the mass of each constituent element in the compound. The molar mass of malachite has been given as:

\(\rm CuCO_3.Cu(OH)_2=2\;Cu+C+5\;O+2\;H\)

Substituting the mass of each element:

\(\rm CuCO_3.Cu(OH)_2=2\;(63.546)+12+5\;(16)+2\;(1)\\\\ CuCO_3.Cu(OH)_2=127.092+12+80+2\\\\ CuCO_3.Cu(OH)_2=221.092\;grams\)

The molar mass of malachite has been 221.092 grams.

The moles of water and carbon dioxide decomposed in the reaction has been given by the stoichiometry law as:

1 mole of malachite decomposed of 1 mole of water and 1 mole of carbon dioxide.

The mass of 1 mole of the compound has been equivalent to the molar mass.

Thus, the mass of water formed has been 18 grams, and the mass of carbon dioxide formed has been 44 grams.

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Answer:

How do amoeba respire.

Define Diffusion.

The temperature increase from 20 °C to 46 °C indicates that the reaction between zinc and copper sulfate solution is exothermic, with heat being released into the surroundings.

In the given reaction between zinc and copper sulfate solution, the temperature change can provide insights into the type of heat change occurring during the reaction. Based on the provided information, the initial temperature of the copper sulfate solution was 20 °C, and the final temperature of the mixture after the reaction was 46 °C.

The temperature increase observed in this reaction indicates an exothermic heat change. An exothermic reaction releases heat energy into the surroundings, resulting in a temperature rise. In this case, the reaction between zinc and copper sulfate solution is exothermic because the final temperature is higher than the initial temperature.

During the reaction, zinc displaces copper from copper sulfate to form zinc sulfate and copper metal. This displacement reaction is known as a single displacement or redox reaction. Zinc is more reactive than copper and therefore replaces copper in the compound.

The formation of new chemical bonds during the reaction releases energy in the form of heat. This energy is transferred to the surroundings, leading to an increase in temperature. The heat released is greater than the heat absorbed, resulting in a net increase in temperature.

The exothermic nature of this reaction can be explained by the difference in bond energies between the reactants and products. The breaking of bonds in the reactants requires energy input, while the formation of new bonds in the products releases energy.

In this case, the energy released during the formation of zinc sulfate and copper metal is greater than the energy required to break the bonds in copper sulfate and zinc.

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Answer:

See figure 1

Explanation:

For this question, we have to remember that a hydrogen bond is an interaction in which we have a partial attraction between a positive dipole and a negative dipole, and in this attraction, we have in the middle a hydrogen atom.

In this interaction, we can have a donor (positive dipole) or a receptor (negative dipole). The receptor is a heteroatom (an atom different to carbon or hydrogen) with high electronegativity. The donor is usually hydrogen atom bonded to the heteroatom.  

I hope it helps!

The sulfuric acid solution has a 0.175 M concentration.

The equation for the reaction between sulfuric acid and sodium hydroxide is as follows:

H2SO4 + 2NaOH → 2H2O + Na2SO4

To solve for the concentration of the sulfuric acid solution, we must first calculate the moles of sodium hydroxide needed to titrate the sulfuric acid solution. The molarity of the sodium hydroxide is given as 0.605 M, and the volume of sodium hydroxide used is given as 30.44 mL. Therefore, the number of moles of sodium hydroxide can be calculated as follows:

\(n(NaOH) = M(NaOH) * V(NaOH)\\n(NaOH) = 0.605 M * 0.03044 L\\n(NaOH) = 0.01844 mol\)

Now that we know the number of moles of sodium hydroxide required to titrate the sulfuric acid solution, we can calculate the number of moles of sulfuric acid present. Since the equation given is a 1:2 mole ratio, we can use the following equation:

\(n(H2SO4) = 2 * n(NaOH)\\n(H2SO4) = 2 * 0.01844 mol\\n(H2SO4) = 0.03688 mol\)

Now that we know the number of moles of sulfuric acid present, we can calculate the concentration of the sulfuric acid solution. The volume of the sulfuric acid solution is given as 210.3 mL. The molarity of the sulfuric acid solution can be calculated as follows:

\(M(H2SO4) =\frac{ n(H2SO4) }{ V(H2SO4)}\\\)

\(M(H2SO4) = \frac{0.03688 mol }{0.2103 L}\\M(H2SO4) = 0.175 M\)

Therefore, the concentration of the sulfuric acid solution is 0.175 M.

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Answer:

Scientists estimate that the human genome, for example, has about 20,000 to 25,000 protein-coding genes. ... In fact, compared to almost any other organism, humans' 25,000 protein-coding genes do not seem like many. The fruit fly Drosophila melanogaster, for example, has an estimated 13,000 protein-coding genes.

Explanation:

Answer:

Explanation:

To calculate the mass of Li3PO4 needed to prepare 500 mL of a solution having a lithium ion concentration of 0.175 M is to use the density of the solution. First, we need to calculate the density of the solution. The density of the solution is equal to the mass of Li3PO4 needed divided by its volume in Liters. We know that the mass of Li3PO4 needed is 8.94 g and the volume of the solution is 500 mL, which is equivalent to 0.5 L. Therefore, the density of the solution is 8.94 g/0.5 L = 17.88 g/L. We can then calculate the mass of Li3PO4 needed by multiplying the density of the solution by the volume of the solution. The mass of Li3PO4 needed is therefore 17.88 g/L x 0.5 L = 8.94 g

Answer:

2.24725 kilograms

Explanation:

To convert grams to kilograms, you divide the number of grams you have by 1000. So, 800 g = 2.225 x 1010/1000 = 2.24725 kg

Answer:

Compounds From Decaying Matter.

Explanation:

A long time ago, when these were compounds in the ground. They were under lots of pressure, and then they turned into coal/diamonds.

Element (Si), Element (Oxygen) in molecular form (O2), Compound (H2O2), Compound (Fe2O3), Compound (CH4).

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The SI unit to the quantity it measures are:

Mass: The mass of an object is a measure of its amount of matter. The SI unit of mass is the kilogram (kg) or gram (g).

Temperature: Temperature is a measure of the average kinetic energy of the particles in a substance. The SI unit of temperature is the kelvin (K).

Time: Time is a measure of the interval between two events. The SI unit of time is the second (s).

Electric current: Electric current is a measure of the flow of electric charge. The SI unit of electric current is the ampere (A).

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Complete question:

Drag the tiles to the correct boxes to complete the pairs. Not all tiles will be used.

Match each SI unit to the quantity it measures.

Answer:  1,950 N

Explanation:

2812.5N of force is needed to accelerate a 1,875 kg object at a rate of 1.5 m/s².

HOW TO CALCULATE FORCE:

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the field of science which would mostly research is chemistry.

Answer:

The major jet streams on Earth are westerly winds that flow west to east.

Ratio of moles of NH₃ produced to moles of N₂ used: 2 moles of NH₃ / 1 mole of N₂

Ratio of moles of NH₃ produced to moles of H₂ used: 2 moles of NH₃ / 3 moles of H₂

From the balanced chemical equation:

N₂ + 3 H₂ ⟶ 2 NH₃

We can determine the ratio of moles of products to the moles of each reactant.

Ratio of moles of NH₃ produced to moles of N₂ used:

From the balanced equation, we can see that 1 mole of N₂ reacts to produce 2 moles of NH₃. Therefore, the ratio is:

2 moles of NH₃ / 1 mole of N₂

Ratio of moles of NH₃ produced to moles of H₂ used:

From the balanced equation, we can see that 3 moles of H₂ react to produce 2 moles of NH₃. Therefore, the ratio is:

2 moles of NH₃ / 3 moles of H₂

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Given the equation of reaction;

N₂ + 3 H₂ ---> 2 NH₃

Calculate the ratio of the moles of produced to the moles of each of the reactants used. (Write two separate ratios.)

This is due to the fact that a substance's chemical qualities, such as its molecular form, polarity, and functional groups, govern how it behaves and interacts with other substances.

By illustrating the spatial arrangement of atoms and chemical bonds within the molecule, chemical structure establishes the molecular geometry of a compound. In doing so, chemists are given a crucial visual depiction of a chemical formula.

In a chemical reaction, reactants come into contact with one another, atoms in the reactants break their connections with one another, and then the atoms reorganise and form new bonds to create the products.

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There are 0.84 moles of aluminum ions (Al3+) present in 0.42 mol of Al2(SO4)3.

To determine the number of moles of aluminum ions (Al3+) present in 0.42 mol of Al2(SO4)3, we need to consider the stoichiometry of the compound.

The formula of aluminum sulfate (Al2(SO4)3) indicates that for every 1 mole of the compound, there are 2 moles of aluminum ions (Al3+). This means that the mole ratio of Al3+ to Al2(SO4)3 is 2:1.

Given that we have 0.42 mol of Al2(SO4)3, we can calculate the moles of Al3+ as follows:

Moles of Al3+ = 0.42 mol Al2(SO4)3 x (2 mol Al3+ / 1 mol Al2(SO4)3)

Moles of Al3+ = 0.42 mol Al2(SO4)3 x 2

Moles of Al3+ = 0.84 mol Al3+

Therefore, there are 0.84 moles of aluminum ions (Al3+) present in 0.42 mol of Al2(SO4)3.

It's important to note that the stoichiometry of the compound determines the mole ratio between the different species involved in the chemical formula. In this case, the 2:1 ratio of Al3+ to Al2(SO4)3 allows us to determine the number of moles of Al3+ based on the given amount of Al2(SO4)3.

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Answer:

No

Explanation:

The gas will have more volume compared to the liquid.

Gases have no definite shape and no volume. They simply assume the shape of any container they are placed into. They will fill up the entirety of the bottle they are placed into.

Liquids have fixed volume although they do not have fixed shape. As they are held with weak intermolecular interactions, they are limited in space.

Therefore, they will maintain that initial volume at which they were introduced into the container.

The balanced equation for the reaction of acetylene (C₂H₂) and oxygen (O₂) is; 2 C₂H₂(g) + 5 O₂(g) → 4 CO₂(g) + 2 H₂O(g) + heat

The coefficients in the balanced equation represent the stoichiometric ratio of the reactants and products in the chemical reaction. In this case, 2 molecules of acetylene (C₂H₂) react with 5 molecules of oxygen (O₂) to produce 4 molecules of carbon dioxide (CO₂) and 2 molecules of water (H₂O), along with the release of heat.

The balanced equation shows that the number of atoms of each element is the same on both the sides of the equation, in accordance with the law of conservation of mass.

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The predominant form of ethylenediamine at pH 6.184 is H2NCH2CH2NH+3.

At pH 6.184, which is slightly acidic, the amino groups in ethylenediamine (H2NCH2CH2NH2) can partially protonate, resulting in the formation of ammonium ions (H+3NCH2CH2NH+3). The equilibrium between the neutral form and the protonated form is pH-dependent.

Therefore, at pH 6.184, the predominant form of ethylenediamine is H2NCH2CH2NH+3.

Answer:

Pb

Explanation:

Answer:

Pb is the answer You're looking for

Pure substances - gasoline, grain alcohol, gold, water, mercury, sugar, and oxygen.

Mixtures - air, salt water.

Pure substances vs Mixtures

Pure substances are made up of only one type of molecule. On the other hand, mixtures are substances that are a mix of two or more different molecules.

Mixtures can be heterogenous when the different molecules are not evenly distributed or homogenous when the molecules are uniformly distributed within the substance.

Gasoline, grain alcohol, gold, water, mercury, sugar, and oxygen all consist of a single type of molecule. They are thus, pure substances.

Air is a mixture of different gases such as oxygen, carbon dioxide, nitrogen, etc. Salt water is a mixture of water and salt.

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Answer:

To determine the change in mass of A over the given time period, we need to find the difference between the initial mass of A and the final mass of A.

From the given table, we can see that the initial mass of A at t = 0 (start time) is 12.4 g and the final mass of A at t = 60 minutes (end time) is 6.2 g.

Therefore, the change in mass of A over 60 minutes is:

Final mass of A - Initial mass of A

= 6.2 g - 12.4 g

= -6.2 g

The negative sign indicates that the mass of A decreased over time, which means that A underwent some kind of reaction or process that caused it to lose mass.

The change in mass of A over 60 minutes is -6.2 grams.

To determine the change in mass of A over 60 minutes, we need to compare the initial mass to the final mass.

From the given information, we can see that the mass of A decreases over time.

Let's calculate the change in mass.

Initial Mass of A: 12.4 g

Final Mass of A: 6.2 g

Change in Mass of A = Final Mass of A - Initial Mass of A

= 6.2 g - 12.4 g

= -6.2 g

The change in mass of A over 60 minutes is -6.2 grams.

Note that the negative sign indicates a decrease in mass.

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Answer:

true i think but dont take my word for it.✌

According to the electronic configuration, carbon has 4 valence electrons that makes it a very stable atom that readily bonds.

Electronic configuration is defined as the distribution of electrons which are present in an atom or molecule in atomic or molecular orbitals.It describes how each electron moves independently in an orbital.

Knowledge of electronic configuration is necessary for understanding the structure of periodic table.It helps in understanding the chemical properties of elements.

Elements undergo chemical reactions in order to achieve stability. Main group elements obey the octet rule in their electronic configuration while the transition elements follow the 18 electron rule. Noble elements have valence shell complete in ground state and hence are said to be stable.

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Answer:

the answer is C.

Explanation:

Bonds form when atoms share or transfer valence electrons. Valence electrons are the electrons in the outer energy level of an atom that may be involved in chemical interactions. Valence electrons are the basis of all chemical bonds.

It is most likely Option A: that a chemical change occurred in step 1 and a physical change occurred in step 2.

In step 1, the yellow particles appeared in the liquid, indicating a chemical change. This could be a result of a chemical reaction between the two colorless liquids, or the addition of a reagent that caused a reaction. This change is characterized by the formation of new substances, which are the yellow particles.

In step 2, the colorless liquid was separated from the yellow particles by decantation. Decantation is a physical process that separates immiscible liquids or solid particles from a liquid by allowing them to settle and then carefully pouring off the liquid.

Therefore, This change is characterized by the separation of components of a mixture, no new substances are formed.

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1. The most electronegative element is O (a)

2. The element that exhibits Greatest number of oxidation states is N (e)

3. The Smallest ionic radius for its most common ion is found for Mg (d)

1. Electronegativity is tendency of an atom to attract shared pair of electrons. Across a period, it increases from left to right while in a group, it decreases as we move down. The most electronegative elements are found in the top right of the periodic table because of the increase in effective nuclear charges. Hence, O is most electronegative element.

2. Oxidation state is the total number of electrons that an atom can either gain or loss to form a chemical bond. N exhibits a wide range of oxidation states from -3 to +5 because of half filled p orbital which is more stable.

3. Ionic radius is the radius of a monatomic ion in an ionic crystal structure. \(Mg^{2+}\) has higher number of protons that will attract the negatively charged valence electrons to a greater extent hence shortening the distance.

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Considering the definition of ideal gas law, the amount of Ar present is 0.00702 moles.

An ideal gas is a set of atoms or molecules that move freely without interactions. The pressure exerted by the gas is due to the collisions of the molecules with the walls of the container. Ideal gas behavior occurs at low pressures. At high pressures the molecules interact and intermolecular forces cause the gas to deviate from ideality.

The pressure, P, the temperature, T, and the volume, V, of an ideal gas, are related by a simple formula called the ideal gas law:

P×V = n×R×T

Where:

In this case, you know:

Replacing in the definition of ideal gas law:

1.4 atm× 0.155 L = n×0.086 (atmL)÷(molK)× 359 K

Solving:

[1.4 atm× 0.155 L] ÷ [0.086 (atmL)÷(molK)× 359 K]= n

0.00702 moles= n

Finally, there are 0.00702 moles of Ar.

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