N2+3H2=>>2NH3. If 6.72dm³ of each of Nitrogen and hydrogen (measured at S.T.P.) are made to produced Ammonium. Which of the reacted will be in excess and by how many moles?

Thermolysis, photolysis, and electrolysis are three different forms of breakdown reactions. A single source was cooked to yield two or more objects in each instance (decomposition).

Decomposition reactions happen when complex chemical entities split apart into smaller components. Decomposition reactions often demand energy input. For instance, the thermal breakdown of potassium hydroxide (KClO3) is a typical technique used during laboratories to generate oxygen gas.

Below is a typical illustration of a thermal breakdown reaction. Calcite breaks down into calcareous dioxide and atmospheric co2 when heated. The production of quick lime, a crucial component in numerous industries, uses this procedure.

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The structure of the compound, there will be ten unique signals in the carbon 13 NMR of the compound.

The NMR signals shows the atoms in a compound that are in unique chemical environments. The atoms that are in the same chemical environment will only give one signal.

Based on the structure of the compound, there will be ten unique signals in the carbon 13 NMR of the compound.

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They are related such that when an object changes speed or direction, we call this acceleration. Acceleration is also called the rate at which velocity changes.

This is a term which is referred to as the rate of change of the object's position with respect to a frame of reference and time and it is regarded as a vector quantity with its S<I unit being meters per second.

Acceleration on the other hand  is defined as the rate at which velocity changes with time, in terms of both speed and direction and the unit is meters per second square.

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The term coordinate covalent bond is best described as option C: "A coordinate covalent bond is a bond in which one atom supplies both of the shared electrons in the bond."

In a coordinate covalent bond, one of the atoms involved in the bond donates both of the electrons needed for the bond formation, while the other atom does not contribute any electrons. This type of bond can also be referred to as a dative bond or a Lewis acid-base bond.

Option A is the definition of a regular covalent bond, where both atoms contribute one electron to form the bond. Option B is describing a hydrogen bond, which is a weak force of attraction between a hydrogen atom in one molecule and a highly electronegative atom in another molecule.

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Answer:

Option B, In a space-filling model of a molecule, the radii of the spheres in a space-filling model are proportional in size to the radii of the atoms

they represent

Explanation:

In a space-filling model of a molecule, atoms are represented as sphere. The radius of the sphere is equal to the radius of the atom and the distance between the center of one sphere to the center of other represents the distance between the atomic nuclei

Option B is correct

Option A is incorrect, as dots are used in the space filling model to represent the atoms

Option C is incorrect because radii of atom do not represents the length of the bonds in a space-  filling model

Explanation:

P_H

and

li_n

hope it helps

Answer:

3 atoms

Explanation:

"In one mole of Barium, there are 3 x \(N_{A}\) barium and chlorine atoms, where \(N_{A}\) is Avagadro's Number, 6.022 x \(10^{23}\) " - anor277 via Socratic

Answer:B

Explanation: Water is 11% hydrogen and 89% oxygen by mass.

B) Water is 11 % hydrogen and 89% oxygen by mass. The law of constant composition, commonly referred to as the law of definite proportions, is demonstrated in this example.

By mass, water is 89% oxygen and 11% hydrogen. The law of constant composition, According to this law, no matter the source or amount of the compound, the relative masses of the elements inside it are always the same. According to the rule of constant composition, water always has an 11:89 mass ratio of hydrogen to oxygen. As a result, no matter where it comes from or how much there is, water will always be made up of 11% hydrogen and 89% oxygen by mass. This rule, which is a fundamental tenet of chemistry, aids in the identification and compositional analysis of chemical substances.

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Answer:

Explanation:

Radioactive decay follows the equation:

Ln [A] = -kt + ln [A]₀

Where [A] is amount of isotope after time t: Our incognite,

k is rate constant: ln 2 / Half-life = 0.0231 years⁻¹

t are 60 years

[A]₀ is initial amount of isotope: 1.0g

Replacing:

Ln [A] = -kt + ln [A]₀

Ln [A] = -0.0231 years⁻¹*60 years + ln 1.0g

ln [A] = -1.386

[A] = 0.25g

The pH at 25^oC of a 0.19 M  solution of potassium butanoate (KC, H,CO approximately 2.96.

Given that potassium butanoate, KC, H, CO, is a weak acid with pKa of 4.82 and a solution of 0.19 M concentration is provided, we can calculate the pH at 25°C as follows:

\(Kw = Ka × Kb\)

Kb = Kw/Ka

Where, Kw = 10^-14 (at 25°C)

Ka = 10^-pKa

We have the pKa value of potassium butanoate as 4.82.

∴ Ka = 10^-4.82

= 1.35 × 10^-5mol/L

Now, Kb = Kw/Ka

= 10^-14/1.35 × 10^-5

= 7.41 × 10^-10M

At 25°C, we can calculate the concentration of H+ ions by using the expression given below:

Ka = [H+] × [A-] / [HA]

[H+] = Ka × [HA] / [A-]

= (1.35 × 10^-5) × √0.19 / 0.19

= 1.1 × 10^-3M

Thus, pH = -log[H+]= -log(1.1 × 10^-3)≈ 2.96

Hence, the pH of 0.19 M potassium butanoate solution at 25°C is approximately 2.96.

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The best safety practice that is recommended before leaving the chemistry laboratory is that remove the lab coat,  the goggles and the gloves and wash the hands properly.

The  best safety practice that is recommended before leaving the chemistry laboratory are :

These are the some basic safety practices that is recommended to follow before leaving the chemistry laboratory. Wash the exposed areas. Most of chemicals are toxic , so clean it properly before leaving the lab.

This question is incomplete, the complete question is :

what is the best safety practice recommended before leaving the chemistry laboratory? group of answer choices :

1) remove lab coat

2)  remove goggles and the gloves

3) wash the hands properly.

4) none of the above

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Boyle's law, also known as Mariotte's law, is a relationship describing how a gas will compress and expand at a constant temperature.

Thus, The pressure (p) of a given quantity of gas changes inversely with its volume (v) at constant temperature, according to this empirical connection, which was established by the physicist Robert Boyle in 1662.

In equation form, this means that pv = k, a constant. The French physicist Edme Mariotte also found the connection.

With the assumption of an ideal (perfect) gas, the law can be derived from the kinetic theory of gases. At sufficiently low pressures, real gases follow Boyle's law, albeit at higher pressures, when the gas starts to deviate from ideal behaviour, the product pv typically drops off slightly.

Thus, Boyle's law, also known as Mariotte's law, is a relationship describing how a gas will compress and expand at a constant temperature.

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The balance equation is \(Cu + 2AgNO_3 \rightarrow Cu(NO_3)_2 + 2Ag\)

Balanced equation means that the number of atoms in the reactant side and the number of atoms in the product side is equal.

Let's check whether the given equation is balanced or not.

\(Cu + 2AgNO_3 \rightarrow Cu(NO_3)_2 + 2Ag\)

Reactant Side     Product Side

Cu = 1                  Cu = 1

Ag = 2                 Ag = 2

N = 2                    N = 2

O = 6                    O = 6

From the above equation we can say that all the atoms in the product side and reactant side are equal so this is a\(Cu + 2AgNO_3 \rightarrow Cu(NO_3)_2 + 2Ag\) balanced chemical equation.

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Question:

Write the balance chemical equation for this statement:

Aqueous silver nitrate reacts with solid copper to form a cupric nitrate solution and silver crystals.

A total of 75.0 joules of heat are absorbed as 3.5 moles of lead are heated from 12.0°C to 52.0°C.The specific heat of lead is 142.8× 10²³ J/gºC.

The term specific heat is defined as the quantity of heat required to increase the temperature of one gram of a substance by one Celsius degree. Its units are J/(kg K) or J/(kg °C).

Given:

Q = m × c ×ΔT

T = 52.0°C - 12.0°C

= 40°C

M = 21 × 10²³grams

Q = 75.0 joules

C = Q / M × ΔT

C =  75 J /21 × 10²³grams  × 40.0

C = 3.5 × 10-²³ × 40× 10²³

C = 142.8× 10²³ J/gºC

Thus, the specific heat of lead is 142.8× 10²³ J/gºC.

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When pyruvate is broken down, the acetyl group is attached to coenzyme a, and two high-energy electrons are transferred to NAD+ to produce NADH.

Pyruvate is a three-carbon compound gotten from the glycolysis of glucose during cellular respiration. It is the end product of glycolysis and one glucose molecule gives two pyruvate molecules. After glycolysis in the cytosol of the cell, pyruvate is sent to the matrix of the mitochondria to begin the second stage of cellular respiration - pyruvate oxidation. The steps in pyruvate oxidation are:

Hence, when pyruvate is broken down, the two high energy electrons gotten from the formation of acetyl are transferred to NAD+. It gets reduced by the electrons and forms NADH.

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Answer:

By the formula of current,

I = Q/t

I × t = Q

Q/I = t

Explanation:

A) t = Q / I

t = 6 / 0.5

t = 12 sec

B) t = Q / I

First we,

36mA

36 / 1000

0.036A OR 3.6 × 10¯²

t = 48 / 0.036 OR t = 48 / 3.6 × 10¯²

t = 48 × 10² / 3.6

t = 1333.3sec t = 13.3 × 10²

Recheck the answers.

Answer:

detail is given below.

Explanation:

The charged particles of nucleus are protons while neutrons are neutral having no charge.

We know that an atom consist of electrons, protons and neutrons. Neutrons and protons are present inside the nucleus while electrons are present out side the nucleus.

Electron has a negative charge and is written as e⁻. The mass of electron is 9.10938356×10⁻³¹ Kg . While mass of proton and neutron is 1.672623×10⁻²⁷Kg and 1.674929×10⁻²⁷ Kg respectively.

Symbol of proton= P⁺  

Symbol of neutron= n⁰  

The number of electron or number of protons are called atomic number while mass number of an atom is sum of protons and neutrons.

one proton contribute 1 amu to the total weight. There are 20 protons and 20 neutrons in Ca thus its atomic mass is 40 amu.

While the atomic number is 20.

The approximate date of the next full moon after January 2 would be around January 9 or 10.

The approximate date of the next full moon after January 2, which is a third quarter moon, can be determined by understanding the lunar cycle. The lunar cycle, also known as the moon's phases, takes approximately 29.5 days to complete.

The cycle starts with the new moon, then progresses through the waxing crescent, first quarter, waxing gibbous, full moon, waning gibbous, third quarter, and finally the waning crescent before returning to the new moon.

Since January 2 is a third quarter moon, we can estimate the remaining days in the lunar cycle until the next full moon. The third quarter moon marks the transition from the waning gibbous to the waning crescent phase, which is about 3/4 of the way through the lunar cycle.

From the third quarter moon, there are still the waning crescent, new moon, waxing crescent, first quarter, and waxing gibbous phases to go through before reaching the full moon. These phases take approximately 1/4 of the lunar cycle, which is about 7 to 8 days.

Taking this into consideration, the approximate date of the next full moon after January 2 would be around January 9 or 10.

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Answer:

P3

Explanation:

Im pretty sure hope this helps

Answer:

The correct option is D

Explanation:

The major raw material used in making cement clinker is limestone. This limestone is usually mixed and heated with clay and can sometimes be mixed, in addition to the clay, with fly ash, black ash, bauxite, iron ore and gypsum. However, the product cement clinker contains different calcium silicates and/or aluminates such as Ca₃SiO₅, Ca₃Al₂O₆, Ca₂(Al,Fe)₂O₅ and Ca₂SiO₄. Thus, the correct option is D.

Answer:

may be mp3 player......

Answer:

mp3 player

Explanation:

Neon sign contains Neon

Flash camera contains Xenon

Helium balloon contains Helium

Answer:

(-1,0)

Explanation:

Answer:

Quantitative experiments show that 4.18 Joules of heat energy are required to raise the temperature of 1g of water by 1°C. Thus, a liter (1000g) of water that increased from 24 to 25°C has absorbed 4.18 J/g°C x 1000g x 1°C or 4180 Joules of energy.

Answer:

A. 7

(assuming the water is neutral)

The pressure of the gas inside the cylinder is 52.90 atm

Given is the number of moles of gas, the temperature and the volume of the gas and we need to find the pressure of the gas inside the cylinder, for this we can use the ideal gas law equation:

PV = nRT

Where:

P = Pressure of the gas (in units of pressure, such as atm)

V = Volume of the gas (in liters)

n = Number of moles of the gas

R = Ideal gas constant (0.0821 L·atm/(mol·K))

T = Temperature of the gas (in Kelvin)

First, let's convert the temperature from Celsius to Kelvin:

T = 25.0 °C + 273.15 = 298.15 K

Now we can substitute the values into the ideal gas law equation:

P × 12.5 L = 27.0 moles × 0.0821 L·atm/(mol·K) × 298.15 K

Simplifying the equation:

P × 12.5 L = 661.2587 L·atm

Dividing both sides by 12.5 L:

P = 661.2587 L·atm / 12.5 L

P ≈ 52.90 atm

Therefore, the pressure of the gas inside the cylinder is approximately 52.90 atm.

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We can use the ideal gas law equation to determine the pressure of a gas within a cylinder:

PV = nRT

Where:

P is the pressure of the gas (in units of pressure, such as atm)

V is the volume of the gas (in units of volume, such as liters)

n is the number of moles of the gas

R is the ideal gas constant (0.0821 L·atm/(mol·K))

T is the temperature of the gas (in units of temperature, such as Kelvin)

we need to convert the temperature from Celsius to Kelvin:

T(K) = T(°C) + 273.15

T(K) = 25.0 °C + 273.15

T(K) = 298.15 K

Now we can plug the data into the ideal gas law equation as follows:

P * 12.5 L = 27.0 moles * 0.0821 L·atm/(mol·K) * 298.15 K

Simplifying the equation:

P = (27.0 moles * 0.0821 L·atm/(mol·K) * 298.15 K) / 12.5 L

Calculating the pressure:

P ≈ 5.046 atm

As a result, the gas inside the cylinder is under a pressure of about 5.046 atm.

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The physical change is a modification in the structure of the chemical substance. Teeth tearing off a bite of a taco represents a physical change. Thus, option B is correct.

A physical change is an alteration in the structure of the chemical involved in the substance. In a physical change, the composition of the chemical remains intact and does not change. It includes changes in texture, temperature, shape, and phase of matter.

The processes like dissolving, boiling, cutting, melting, bending, and freezing are said to be physical changes. The teeth-bitting tacos result in smaller bites is a physical change as there is a change in the shape and size but not the composition.

Therefore, option B. the teeth tearing tacos is an example of physical change.

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When q > k, the amount of the products must decrease and the amount of the reactants must increase until equilibrium is established. The reaction will proceed toward the reactants

In a reversible chemical reaction, chemical equilibrium is the state in which there is no net change in the quantity of reactants or products. When a chemical reaction is reversible, the products react with the original reactants as soon as they are created.

There is no net change in the quantity of the chemicals involved when the two opposing reactions are in equilibrium because they are occurring at identical rates, or velocities. At this point, the reaction may be deemed to be finished, meaning that the maximum amount of reactants to products has been converted under the given reaction conditions. It is possible to formulate the equilibrium conditions quantitatively.

For example, for the reversible reaction A ⇋ B + C, the velocity of the reaction to the right, \(r_{1}\), is given by the mathematical expression (based on the law of mass action) \(r_{1}\)= \(k_{1}\)(A), where \(k_{1}\) is the reaction-rate constant and the symbol in parentheses represents the concentration of A. The velocity of the reaction to the left, \(r_{2}\), is \(r_{2}\)= \(k_{2}\)(B)(C). At equilibrium, \(r_{1}\)= \(r_{2}\), therefore:

\(k_{1}(A)_{e} = k_{2} (B)_{e} (C)_{e}\)  or

\(k_{1}/k_{2} = (B)_{e} (C)_{e}/(A)_{e}=K\)

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The Big Bang Theory describes the formation of the universe, which scientists believe happened 13.7 billion years ago. The Big Bang Theory is a theory that explains the formation of the observable universe.

Under the Big Bang theory, the universe began as a very hot, very dense point in space that began expanding outward. It still expands today. This model describes the universe as a super ball with a very high density and temperature that explodes and is still expanding until today.

The Big Bang is a scientific theory about how the universe started and then made of group of stars known as the galaxies we see today.

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You should always assume that glassware and metal objects are hot, while working with a heat source.

Safety precautions you should use when working with a heat source are:

Safety equipment you should have in your laboratory are:

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