Write the complete and balanced equation for the acid base reaction between phosphoric acid (H PO ) and calcium hydroxide (Ca(OH) ).

Answer:

will be 9.7 Liters

Explanation:

Answer: One carbon atom can make a maximum of 4 covalent bonds. The best option to answer the question is number 4.

Explanation:

The question requires us to choose, among the options given, which one corresponds to the maximum number of carbon bonds that can be formed by one carbon atom.

To answer this question, we can consider the electronic configuration of a carbon atom. Carbon (C) presents atomic number 6, therefore it contains 6 electrons and its electronic configuration can be written as:

Note that there are 4 electrons in carbon's valence shell (2s2 and 2p2), thus a carbon atom needs additional 4 electrons to achieve stability.

If the atom needs 4 electrons to achieve stability, it means it can make 4 covalent bonds to "acquire" these electrons.

Therefore, the best option to answer the question is number 4.

The redox reaction most likely occur if silver and copper metal were added to a solution that contained silver and copper ions is ;

Cu²⁺ + 2Ag → Cu + 2Ag⁺

A chemical reaction that takes place between an oxidizing substance and a reducing substance.

The oxidizing substance loses electrons in the reaction, and the reducing substance gains electrons.

On the reduction potential chart, we have that silver ion (Ag) is a stronger oxidizing agent than, Copper (Cu), which is a reducing agent the compared to silver

The redox reaction most likely occur if silver and copper metal were added to a solution that contained silver and copper ions is ;

Cu²⁺ + 2Ag → Cu + 2Ag⁺

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To determine the tomato's velocity when it hits the ground, we need more information. Specifically, we need the height from which the tomato was dropped and the tomato mass.

Without these details, it is impossible to calculate velocity accurately. The velocity of an object when it hits the ground depends on factors such as the height of the fall, the mass of the object, and any forces acting on it during the fall (such as air resistance).

If you can provide the necessary information, I can help you calculate the velocity of the tomato when it hits the ground.

Answer:

Mars and Orbital code saber and the alien

1. The constituent gases of air are:

2. The surrounding air is not seen with the eyes because it is transparent. Air molecules are not visible to the na-ked eye, and they do not scatter or absorb visible light significantly. Therefore, air appears colorless and transparent.

3. To prove that air supports burning, you can perform an experiment with a burning candle. Place a glass jar or bell jar over a lit candle, ensuring that the jar is airtight. As the candle burns, it consumes oxygen from the air inside the jar. Eventually, the candle flame will go out due to the lack of oxygen, proving that air (specifically oxygen) is necessary for burning.

4. To show that air occupies space, you can perform a simple experiment using a plastic bottle or syringe. Fill the bottle or syringe with water, ensuring there are no air bubbles. Then, cover the opening tightly and try to compress the air inside. You will find that it is not possible to compress the air significantly, indicating that air occupies space.

5. To prove that air has weight, you can use a sensitive balance or scale. Weigh an airtight container or balloon, and then fill it with air. The weight of the container or balloon with the added air will be greater than its initial weight, demonstrating that air has weight.

6. Air is useful to us in various ways. Three points highlighting the importance of air are:

7. Three properties of air include:

Air exerts force in various ways. For example, air pressure allows objects like airplanes to fly by providing lift. Air resistance or drag opposes the motion of objects moving through the air, creating a force that can affect their speed and trajectory.

8. Four effects of air pollution include:

9. Causes of pollution:

10. Two control measures for air pollution include:

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The percentage composition of Nitrogen in the compound is 35.71%

Using the ideal gas equation, the mole of nitrogen can be obtained as follow

PV = nRT

n = PV / RT

n = (700 × 0.1) / ( 62.364 × 250)

n = 0.00448 mole

Mass = mole × molar mass

Mass of nitrogen = 0.00448 × 28

Mass of nitrogen = 0.125 g

Percentage = (mass of element / mass of compound) × 100

Percentage of nitrogen = (0.125 / 0.35) × 100

Percentage of nitrogen = 35.71%

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Ammonia (\(NH_3\)) and ammonium chloride (\(NH_4Cl\)) mixture could be a useful buffer in a solution. Option C

A buffer is a solution that can resist changes in pH when small amounts of acid or base are added. It consists of a weak acid and its conjugate base or a weak base and its conjugate acid. The buffer system works by the principle of Le Chatelier's principle, where the equilibrium is shifted to counteract the changes caused by the addition of an acid or a base.

In option A, acetic acid (\(CH_3CO_2H\)) is a weak acid, but hydrochloric acid (HCl) is a strong acid. This combination does not form a buffer because HCl is completely dissociated in water and cannot provide a significant concentration of its conjugate base.

Option B consists of sodium hydroxide (NaOH), which is a strong base, and elemental sodium (Na), which is a metal. This combination does not form a buffer as there is no weak acid-base pair involved.

Option D contains acetic acid (\(CH_3CO_2H\)), a weak acid, and ammonia (\(NH_3\)), a weak base. Although they are weak acid and base, they do not form a buffer system together as they are both weak acids or bases and lack the required conjugate acid-base pair.

Option C, ammonia (\(NH_3\)), is a weak base, and ammonium chloride (\(NH_4Cl\)) is its conjugate acid. This combination can form a buffer system. When ammonia reacts with water, it forms ammonium ions (NH4+) and hydroxide ions (OH-).

The ammonium ions act as the weak acid, while the ammonia acts as the weak base. The addition of a small amount of acid will be counteracted by the ammonium ions, and the addition of a small amount of base will be counteracted by the ammonia, thus maintaining the pH of the solution relatively stable.

Therefore, option C, consisting of ammonia (\(NH_3\)) and ammonium chloride (\(NH_4Cl\)), is the suitable mixture that could be a useful buffer in a solution.

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The net ionic equation can be given as Sn²⁺ (aq) + S²⁻ (aq) → SnS (s).

The atoms or molecules on losing or gaining electrons in order to achieve the stable configuration results in the formation of positive or negative charge and are termed as ions.

The ionic equation can be given with the formation of the respective ions of the reactant and the product side.

SnSO₄ (aq) → Sn²⁺ (aq) + SO₄²⁻ (aq)

Na₂S (aq) → 2 Na⁺ (aq)  + S²⁻ (aq)

SnS (s) → did not dissociates as form a solid covalent compound

Na₂SO₄ (aq) → 2 Na⁺ (aq)  + SO₄²⁻ (aq)

The complete ionic equation can be given as:

Sn²⁺ (aq) + SO₄²⁻ (aq) + 2 Na⁺ (aq)  + S²⁻ (aq) → SnS (s)  2 Na⁺ (aq)  + SO₄²⁻ (aq)

Eliminating the common ions on the product and the reactant side:

Sn²⁺ (aq) + S²⁻ (aq) → SnS (s)

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The change in free energy is -24107 J. The equilibrium constant is 2.3.

We know that the change in free energy of a reaction can be used to obtain the equilibrium constant of the reaction. On the other hand, we  know that change in free energy can be obtained from the enthalpy and the entropy as follows;

ΔGo = ΔHo  - T ΔSo

ΔGo = Change in free energy

ΔHo = change in enthalpy

T = temperature change

ΔSo = Change in entropy

Then;

ΔGo = 178.3 * 10^3 - (1273 * 159)

ΔGo = 178300 - 202407

ΔGo = -24107 J

Then we have;

ΔGo = -RTlnKp

R = gas constant

T = temperature

Kp = Rate constant

Thus;

Kp = ΔGo / -RT

Kp =  -24107 /-(8.314 * 1273)

Kp = 2.3

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The non-metal elements in Group 7 – known as the halogens – get less reactive as you go down the group

Answer & Explanation:

The reactivity of elements in Group VII, also known as Group 17, decreases with increasing atomic radius. This is because halogens have high electronegativities and a proclivity to gain electrons in noble gas configurations. Myths are traditional stories or beliefs that explain cultural or societal beliefs, customs, or natural phenomena. They can be passed down through generations and can be based on true or fictitious events. Mythology, on the other hand, is the collection of myths associated with a specific culture or religion. Mythology can be amplified through retelling, incorporation into religious practices; association with significant events or figures, and adaptation into other media forms such as literature, film, or art.

Work can be totally transformed into heat (for example, by friction), whereas heat can only be partially converted into work.

A model is a depiction of something that is frequently too difficult to directly observe or display. Although experimental testing validates a model, it is only accurate in explaining specific characteristics of a physical system.

Work is defined as the transfer of energy to or from a system by any means other than heat.

A transfer of energy to or from a system by any means other than heat is called “work”. Work can be completely converted into heat (by friction, for example), but heat can only be partially converted to work. The Second Law of Thermodynamics, states that the complete conversion of heat into work is impossible.

Heat transmission in materials can be described using the kinetic particle model. Heat energy always travels from a high-temperature zone to a low-temperature region.

Thus, heat can do work by constructing a model.

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Answer:

[Ar] 3d¹⁰ 4s² 4p⁶

Explanation:

Krypton is a chemical element with the symbol Kr and atomic number 36. It is a colorless, odorless, tasteless noble gas that occurs in trace amounts in the atmosphere and is often used with other rare gases in fluorescent lamps. With rare exceptions, krypton is chemically iner,

Answer:

7p

Explanation:

principal quantum number is 7

n=7( principle shell)

angular momentum quantum number gives sub shell

l = 1 means it is p orbital

so answer is 7p orbital

The electric current is  0.025 A

Electric current refers back to the go with the flow of energy in an electronic circuit and to the amount of strength flowing through a circuit. it's far measured in amperes (A). the bigger the cost in amperes, the more energy is flowing within the circuit.

Ag+ + e¯ →Ag

1F deposits 107.87 g/mol (molecular mass) of silver

1F = 96500 C

Let, 107.87 g/mol needed = 96500 C

Number of coulombs required to deposit 0.3650 g of silver =(96500/107.87) 0.3650  

Q = 326.5 C

According to Faraday’s law, Q = I x t

I = 326.5 C / (216 x 60 s) = 0.025 A

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Answer:

maybe try to do something with electricity?

Explanation:

give me an update on when u find one :) cant wait to see it

2) The heat capacity of aluminum is 219.44 J/mol.°C.

3) a) the experimental ΔHs of ice is -0.154 kJ/mol.

b) too high

Calculate the heat released by the aluminum:

q = mcΔT

where q = heat released, m = mass of aluminum, c = specific heat capacity of water and ΔT = change in temperature.

q = (24.7 g) (0.903 J/g°C) (100.0°C - 23.4°C)

q = 18643.26 J

Next, calculate the heat absorbed by the calorimeter:

q = mcΔT

q = (99.5 g + 24.7 g) (15.8 J/°C) (23.4°C - 19.5°C)

q = 4009.92 J

The heat released by the aluminum is equal to the heat absorbed by the calorimeter and water:

18643.26 J = 4009.92 J + q3

where q3 = heat absorbed by the water.

q3 = 14633.34 J

Calculate the molar heat capacity of aluminum:

Cp,m = q3 / (nΔT)

where Cp,m = molar heat capacity, n = number of moles of aluminum, and ΔT = change in temperature.

n = m / M

where m = mass of aluminum and M = molar mass of aluminum (26.98 g/mol).

n = 24.7 g / 26.98 g/mol

n = 0.916 mol

Cp,m = 14633.34 J / (0.916 mol * 76.6°C)

Cp,m = 219.44 J/mol.°C

Therefore, the heat capacity of aluminum is 219.44 J/mol.°C.

3) (a) To calculate the experimental ΔHs of ice, we first need to calculate the heat gained by the water and the heat lost by the ice during the process.

Heat gained by water = mass of water × specific heat capacity of water × change in temperature

= 100.0 g × 4.184 J/g·°C × (-20.1°C)

= -8,423.84 J

Heat lost by ice = mass of ice × heat of fusion of ice

= 25.6 g × 6.01 kJ/mol

= 154.496 J

Since the process is assumed to be adiabatic (no heat exchange with the surroundings), the heat gained by the water must be equal to the heat lost by the ice.

Thus, -8,423.84 J = 154.496 J = -8,269.344 J

The negative sign indicates that the process is exothermic. Therefore, the experimental ΔHs of ice is:

ΔHs = -154.496 J/mol = -0.154 kJ/mol

(b) If the student forgets to include the calorimeter term in the calculation, the calculated ΔHs of ice will be too high. This is because the heat absorbed by the calorimeter during the process is not accounted for, leading to an overestimation of the heat gained by the water and underestimation of the heat lost by the ice.

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Answer:

All electric heaters make use of one or more of the fundamental heat transfer mechanisms – namely convection, conduction, or radiation.

For regular...

Conduction is heat transfer by direct contact, like frying an egg. Convection is heat transfer by the movement of gases or liquids, like most home furnaces, clothes dryers, or car heaters. Radiation is the transfer of heat in waves through space, like the sun or a fire.

Answer:  the law that the product of the pressure and the volume of one gram molecule of an ideal gas is equal to the product of the absolute temperature of the gas and the universal gas constant.An ideal gas is a gas that conforms, in physical behaviour, to a particular, idealized relation between pressure, volume, and temperature called the ideal gas law

The compound has an empirical formula of \(K_2H_2P_2O_8\) and a molecular formula of \(K_2HPO_4\).

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The correct question would be as

The composition of a compound is 28.73% K. 1.48% H, 22.76% P, and 47.03% O. The molar mass of the compound is 136.1 g/mol. What is the Molecular Formula of the compound?

\(KH_2PO_4\\KH_3PO_4\\K_2H_4P_20_{12}\\K_2H_3PO_6\)

Answer:

3HCl(aq)+Al(OH)3(s)=AlCl3(aq)+3H2O(l)

Explanation:

This is a double replacement reaction.

Step One: Write down the compound from the name.

Aluminum Hydroxide Al(OH)3

Hydrochloric Acid HCL

Step Two: Perform the double replacement reaction.

AB+CD=AD+CB

Step Three: Balance the equation

Final step: Write in physical states.

The physical state will either be (aq), (s), (l) or (g).

Answer:

The equation for a volume of a sphere is V= (4/3)πr3

The above equations says we need to find the radius of our sphere. According to https://www.ptable.com/ the radius of a gold atom is 144 pm.

The questions wants the answer to be in cm3 which means we need to convert picometers into centimeters. 1cm= 1010pm

144pm x (1cm/1010pm) = 1.44 x 10-8cm

Now we plug the radius of the gold atom into the volume equation.

V= (4/3)π(1.44x 10-8cm)3 -----> Answer= 1.25x10-23 cm3

Answer:

one from each parent

Explanation:

Answer:

86.85°C

Explanation:

K = °C + 273.15

360K − 273.15 = 86.85°C ≈ 87°C

Answer:

ok im eating chips :)

Explanation:

The fumes being released are almost certainly chlorine, which as you have observed, is quite hazardous. Bleach usually contains strong warnings not to mix with any other cleaning chemical, as some of them will tend to rapidly decompose its active ingredient and release a lot of gaseous chlorine

Answer:

Liquid–liquid extraction

Explanation:

1) First, let's balance the chemical equation:

_S + _O2 --> _SO3

To balance the equation, we need to equal the number of atoms of each element on the reactants and products side.

2 S + 3 O2 --> 2 SO3

Reactants side:

S - 2

O - 6

Products side:

S - 2

O - 6

2) Now to calculate, we need to know the molar volume value. This is the space occupied, in liters, by 1 mole of any matter in a gaseous state and under normal conditions of temperature and pressure (STP). The value is 22.4 liters/mol

So let's transform 9.1 L of SO3 into mole:

22.4 liters --- 1 mol

9.1 liters ---- x mol

22.4x = 9.1

x = 0.406 moles of SO3

3) Now we use the reaction proportion to know how many moles of O2 is needed:

3 moles of O2 ----- 2 moles of SO3

x moles of O2 ----- 0.40625 moles of SO3

2x = 1.21875

x = 0.609375 moles of O2

4) Now let's transform moles of O2 into liters using the molar volume value:

22.4 L ---- 1 mol

x L ----- 0.609375

x = 13.7 liters of O2

Answer: It is needed 13.7 liters of O2.

Answer:

Titanium

Explanation:

titanium can form 4+ cations