A college student ran out of salt and pepper to season his eggs with. All of the stores he went to was out of salt so he took it upon himself to make his own. He used copper (II) chloride and sodium nitrate to produce copper (II) nitrate and sodium chloride. The equation for this reaction is shown: __CuCl2+ __NaNO3__Cu(NO3)2+ __NaCl. Identify the coefficients by balancing theequation and tell what type of reaction it is. a.1, 2, 1, 2; single replacementb.2, 4, 2, 4, decompositionc.1, 2, 1, 2; double replacementd.1, 2, 3, 4; combustion

Answer:

may be the answer is Heat and pressure - melting - cooling

Answer:

The formula for the anhydrous compound that was part of the mixture called natron that was used by the Egyptians is Na2(CO3)10(H2O).

They use this compound for medicine, cookery, agriculture, in glass-making and to dehydrate egyptian mummies.

Compound of sodium carbonate and sodium bicarbonate was the name of the resulting hydrate that formed.

Answer:

known as reactions and metaphorically breaking the witness into telling the truth. I hope this helped:)

Explanation:

The specific heat of the unknown metal is 0.128 J/g°C. This means that it takes 0.128 joules of energy to raise 1 gram of metal by 1 degree Celsius.

To calculate the specific heat of a metal, the following formula should be used.

Q = m*c*ΔT where:

Q = amount of energy absorbed by the metal

m = mass of metal

c = specific heat of the metal

ΔT = temperature change of the metal

Assume the mass of the metal is 50 g, the amount of energy absorbed by the metal is 6000 J, and the initial and final temperatures of the metal are 25 °C and 955 °C respectively. Therefore, you can substitute these values ​​into expressions.

6000J = 50g x c x (955°C to 25°C)

Simplifying the equation, we get:

6000J = 50g*c*930°C

Dividing both sides by (50g * 930°C) gives:

c = 0.128 J/g°C

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Answer:

Fe2O3

Explanation:

if we have to answer whether it is wrong or correct then it is wrong because the correct answer would be Fe (s) + O2 (g) = Fe2O3 (s) because the valences will be exchanged

Answer:

the answer would be B :)

The correct answer is; Bonds create new elements

Chemical bonds are formed when two or more atoms are joined together to form a compound.

Chemical compounds are more stable than the respective elements from which they are formed.

Chemical bonds do not create new elements.

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Answer:6.0g x 1 mol/18.02g x 40,65 kJ/mol

Explanation: just did the quiz

13.6 kilojoules (kJ) of energy is released when 6.0 g of water is condensed from water to vapor.

To calculate the energy released when 6.0 grams of water is condensed from water to vapor, we need to use the concept of heat of vaporization (also known as enthalpy of vaporization). The heat of vaporization is the amount of energy required to change one gram of a liquid into vapor at its boiling point, without any change in temperature.

The heat of vaporization of water is approximately 40.7 kJ/mol at its boiling point (100°C or 373.15 K). We can use this information to calculate the energy released when 6.0 grams of water is condensed.

Step 1: Calculate the number of moles of water (H₂O) in 6.0 grams.

Molar mass of water (H₂O) = 2 g/mol (for hydrogen) + 16 g/mol (for oxygen) = 18 g/mol

Number of moles of water = Mass of water / Molar mass of water

Number of moles of water = 6.0 g / 18 g/mol = 0.333 moles

Step 2: Calculate the energy released during condensation.

Energy released = Number of moles of water × Heat of vaporization

Energy released = 0.333 moles × 40.7 kJ/mol = 13.6 kJ

Therefore, approximately 13.6 kilojoules (kJ) of energy are released when 6.0 grams of water is condensed from water to vapor.

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Answer:

\( \boxed{ \bold{ \huge{ \boxed{ \sf{oxygen}}}}}\)

Explanation:

Oxygen is used by living beings for the oxidation of food or glucose to produce energy during respiration. It has 8 protons and 8 neutrons.

Hope I helped!

Best regards! :D

Answer:

A

Explanation:

You can eliminate C because you need to consult a periodic table to determine the mass (not the weight).

There are other answers you could use. The wording is awfully sloppy.  D is an example of that. The elements part is true, the atoms part is not really true in all cases.  For example NaCl is table salt and both the elements are ions, not atoms. Na is plus ion and Cl is minus one. B is wrong for the same reason.

I think in the end I would choose A.  I think this is a very sly question. It is not really testing chemistry. It is testing how well you know your definitions.

The density of a substance is defined as the mass of the subtance per unit volume of the substance. Mathematically, it can be expressed as:

Density = mass / volume

For example, unknown liquid has a mass of 30.8 g, and a volume of 31.5 mL. What is the density of this liquid?

We can obtain the density as follow:

Density = mass / volume

Density of liquid = 30.8 / 31.5

Density of liquid = 0.98 g/mL

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The number of moles of sodium (Na) in 3.4 x 10^23 atoms is approximately 5.64 moles.

In the first paragraph, the main answer is that there are approximately 5.64 moles of sodium (Na) in 3.4 x 10^23 atoms.

Now, let's explain the calculation in the second paragraph. The mole is a unit of measurement used in chemistry to quantify the amount of a substance. One mole of any element contains Avogadro's number of atoms, which is approximately 6.022 x 10^23. In this case, we have 3.4 x 10^23 atoms of sodium (Na). To convert this into moles, we divide the number of atoms by Avogadro's number.

Mathematically, the calculation is as follows:

Moles of Na = (Number of atoms of Na) / (Avogadro's number)

Moles of Na = (3.4 x 10^23) / (6.022 x 10^23)

Moles of Na ≈ 5.64 moles

Therefore, there are approximately 5.64 moles of sodium (Na) in 3.4 x 10^23 atoms.

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Answer:

10 400 N

Explanation:

A drag force is an oppositional or limiting force which must be overcome before an object must move wit a force. The lesser the drag force, the higher the probability that an object would move easily.

From the question give, the resultant force of the was is 600 N and force from the engine - 11 000 N.

Drag force = 11 000 - 600

                 = 10 400 N

The drag force on the car is 10 400 N.

This shows that the car would not move since the drag force (10 400 N) is far greater than the resultant force(600 N).

Aluminum displaces the iron in a redox reaction as it has its protective layer of aluminum oxide because it is more reactive than iron.

A redox reaction is a reaction in which oxidation and reduction reaction occur simultaneously and to the same extent.

An oxidation reaction occurs when atoms of elements lose electrons resulting in an increase in the oxidation number of the element.

A\ occurs when atoms of elements gain electrons resulting in a decrease in the oxidation number of the element.

The redox reaction of the displacement of iron by aluminum to form a protective layer of aluminum oxide is given below:

Fe₂O₃ (aq) +  2 Al (s) ----> 2 Fe (s) + Al₂O₃

In the given redox reaction above, aluminum metal displaces iron from its oxide to form aluminum oxide. Iron (iii) ion is reduced to metallic iron while metallic aluminum is oxidized to aluminum (iii) ion.

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Answer:

Explanation:

The closest I can come to this is

Li C2H5 which would really be weird, but it comes to nearly 37.11. Everything depends on the periodic table you are using.

C2 = 2 * 12.011 = 24.022

H5 = 5 *   1.008 = 5.040

Li =  1 * 6.94          6.94

Total                    36.002  

The heat released by metal and added to water is the same which is 1039.83 joule.

The equilibrium condition of the system depends on the heat released from both gold and water. The total heat received by the system will equal to total heat released by objects. It should follow

Q released = Q received

The heat can be defined by

Q = m . c . ΔT

where Q is heat, m is mass, c is the specific heat constant and ΔT is the change in temperature.

The given parameters are

m = 17.27 g = 0.01727 kf

T1 = 92 ⁰C

T2 = 25.1 ⁰C

c = 900 J/kg⁰C

By substituting the given parameters, we can calculate the heat

Q = m . c . ΔT

Q = 0.01727 . 900 . (92 - 25.1)

Q = 1039.83 joule

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Answer:

i guess the answer is..true

the ozone in troposphere protects the earth from ultra violet waves that may cause global warming

Answer:

4.78 K

Explanation:

The reactant \(O_{2}\) is limiting if we begin with 9. 50 grams of al and 9. 50 grams of  \(O_{2}\)   .

The reactant whose number of moles is present in less quantity is called limiting reactant .

Calculation,

Given mass of Aluminium and oxygen

Mass of Aluminium = 9. 50 grams

and Mass of oxygen = 9. 50 grams

Number of moles of aluminium = given mass / molar mass of aluminium

Number of moles of aluminium = 9. 50 grams/ 26.99 = 0.351 mole

Number of moles of oxygen = given mass / molar mass of oxygen

Number of moles of oxygen = 9. 50 grams/ 31.999  = 0.296 mole

The reactant \(O_{2}\) is limiting because oxygen present in less quantity or in limiting quantity and consume rapidly.

Therefor , the reactant \(O_{2}\) is limiting if we begin with 9. 50 grams of al and 9. 50 grams of  \(O_{2}\)   .

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According to the relation of variables in the electromagnetic spectrum the maximum wavelength of light is 36.3 ×10\(^-\)³¹ m.

The  electromagnetic spectrum consists of electromagnetic radiation consists of waves made up of electromagnetic field which are capable of propogating through space and carry the radiant electromagnetic energy.

The radiation are composed of electromagnetic waves which are synchronized oscillations of electric and magnetic fields . They are created due to change which is periodic in electric as well as magnetic fields.

In the given problem,energy is related to wavelength by the formula, λ=hc/E,λ=6.626×10\(^-34\)×3×10⁸/547×1000=36.3×10\(^-31\) m.

Thus, the maximum wavelength of light is 36.3×10\(^-31\) m.

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The alkali metal oxides have the greatest percent by oxygen mass is lithium oxide. Therefore, option D is correct.

The chemical elements' lithium, sodium, potassium, rubidium, caesium, and francium make up the alkali metals. Together with hydrogen, they form group 1, which is located in the periodic table's s-block.

All the Group 1 elements are extremely reactive. To keep air and water away from them, they must be stored in oil. When Group 1 elements react with water, they form alkaline metal hydroxides (with a pH above 7). This is why they are referred to as alkali metals.

Thus, option D is correct.

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Cations are always smaller than the atoms from which they form. Anions are always larger than the atoms from which they form. Ions are usually bigger than the atoms from which they are formed.

When an atom receives or loses electrons, the atom's electron configuration changes, resulting in a net positive or negative charge.

This net charge expands the electron cloud surrounding the nucleus, making the ion bigger in size than the neutral atoms from which it arose. When a metal atom loses one or more electrons to create a cation, it shrinks in size because the positive charge of the nucleus pulls the remaining electrons more strongly.

When a nonmetal atom obtains one or more electrons to create an anion, it normally expands in size.Because of the increasing amount of electrons, the electron cloud surrounding the nucleus grows. It should be noted that this comparison is not absolute and is dependent on the individual factors involved. Some ions are smaller than their neutral atom counterparts, while others are similar in size.

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The complete question is:

Compare the size of ions to the size of atoms from which they form.

Answer:

c ) 8

Explanation:

Given data:

Number of moles of water produced = ?

Moles of hydrogen react = 8 mol

Solution:

Chemical equation:

2H₂ + O₂     →     2H₂O

Now we will compare the moles of hydrogen and water.

         H₂          :         H₂O

          2          :            2

         8           :           8

Thus, 8 moles of water will produced.

the limiting reactant is CH₄.

To determine the limiting reactant, we need to compare the amounts of reactants available and their respective stoichiometry in the balanced chemical equation.

The balanced equation for the reaction between CH₄ (methane) and O₂ (oxygen) to produce CO₂ (carbon dioxide) and H₂O (water) is:

CH₄ + 2O₂ → CO₂ + 2H₂O

First, let's calculate the number of moles for each reactant:

Molar mass of CH₄ (carbon + 4 hydrogen atoms) = 12.01 g/mol + 4(1.01 g/mol) = 16.05 g/mol

Number of moles of CH₄ = mass / molar mass = 4.0 g / 16.05 g/mol ≈ 0.249 mol

Molar mass of O₂ (2 oxygen atoms) = 2(16.00 g/mol) = 32.00 g/mol

Number of moles of O₂ = mass / molar mass = 9.0 g / 32.00 g/mol ≈ 0.281 mol

Now, let's compare the mole ratios of CH₄ and O₂ in the balanced equation.

From the balanced equation, we see that the ratio of CH₄ to O₂ is 1:2. This means that for every 1 mole of CH₄, we need 2 moles of O₂ to react completely.

The available moles of O₂ (0.281 mol) is greater than the required moles based on the stoichiometry (0.249 mol * 2 = 0.498 mol). This indicates that O₂ is present in excess, and CH₄ is the limiting reactant.

Therefore, the limiting reactant is CH₄.

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Ionization energy increases as we move across the period from left to right.

order of ionization energy across period 2

Li < B < Be < C < O < N < F < Ne

What is Ionization energy?

Trends for Ionization energy

order of ionization energy across period 2

Li < B < Be < C < O < N < F < Ne

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The possible term states for an excited carbon atom with the electronic configuration 1s²2s²2p¹4f¹ are:

Among these possible term states, the term state likely to have the lowest energy is 2S+1S.

In atomic physics, term symbols are used to represent the total angular momentum, spin, and orbital angular momentum of an electron configuration. The term symbol is given by 2S+1L, where S is the total spin angular momentum and L is the total orbital angular momentum.

In this case, the electronic configuration of the excited carbon atom is 1s²2s²2p¹4f¹. The total spin angular momentum (S) is given by the sum of the individual electron spins, which in this case is 1/2 + 1/2 = 1. The total orbital angular momentum (L) is determined by the highest energy level electron, which is in the 2p orbital. Since the 2p orbital has an orbital angular momentum of 1, L = 1.

Therefore, the term symbol for the lowest energy state is 2S+1S, where S = 1 and L = 1. This corresponds to the singlet S state, which is the ground state of the carbon atom. The other term states have higher energy levels due to the presence of higher orbital angular momentum or higher spin.

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Answer:

magnesium and oxygen

Explanation:

Answer:

397,570 g/m^3

Explanation:

The volume of the cylinder can be calculated using its height and diameter.

Mass of the soil sample (m) = 30 g

Height of the cylinder (h) = 6 cm

Diameter of the cylinder (d) = 4 cm

First, we need to calculate the radius (r) of the cylinder

Radius (r) = diameter / 2 = 4 cm / 2 = 2 cm = 0.02 m

Now, we can calculate the volume (V) of the cylinder

V = π * r^2 * h

V = 3.14159 * (0.02 m)^2 * 0.06 m

V = 7.5398 E-5 m^3

Calculate the bulk density (ρ) using this formula

ρ = m / V

ρ = 30 g / 7.5398 E-5 m^3

ρ = 397,887 g/m^3

According to the graph, only the reactant A was present at the beginning of the reaction.

The graph shows the concentration for the reactant A and the product that is A2. In this graph, the concentration is displayed on the vertical axis, while the horizontal axis shows the time.

In general terms, it can be observed that at the beginning only the reactant A is present, but as the reaction occurs the concentration of this reactant decreases, while the concentration of the product A2 increases.

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Noble gas electron configuration for  ion silver, Ag+ is Ag⁺ = [Kr] 4d¹⁰

Noble gas Electronic configuration for Ag is :

atomic number of silver, Ag is 47.

¹⁰⁸Ag₄₇ = 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s²  4p⁶ 4d⁹ 5s²

there is exception : Half filled and full filled d orbital are more stable than the one electron is less. so one electron moves from s orbital to d orbital to make it more stable. so the correct electronic configuration is as follows :

¹⁰⁸Ag₄₇ = 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s²  4p⁶ 4d¹⁰ 5s¹

now for Ag⁺ , we loose one electron. so, the electronic configuration is :

Ag⁺  = 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s²  4p⁶ 4d¹⁰

noble gas configuration for Ag⁺ ion is as follows:

Ag⁺ = [Kr] 4d¹⁰

Thus, Noble gas Electronic configuration for Ag is : Ag⁺ = [Kr] 4d¹⁰ , Ag+ is Ag⁺ = [Kr] 4d¹⁰

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The answer is d) the volume ratios of gaseous reactants and products.                                                                                          

While the coefficients in a balanced chemical equation provide information about the mole ratios of reactants and products and the ratios of the number of molecules of reactants and products, they do not provide information about the volume ratios of gaseous reactants and products. This is because the volume of a gas can vary depending on temperature, pressure, and other factors.
However, they do not directly convey mass ratios, as different substances have different molar masses, which must be considered separately.

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