name given to an atom that has lost electrons to become a positive charged particle.

Answer:

True

Explanation:

A hand weavers would take much more time in their craft than large factories did, their industry began to decline and be replaced by industrial machines.

Answer:

a

Explanation:

because look at the pic of the flower

Answer:

a

Explanation:

Explanation:

electrovalent bond covers single bond.

Covalent bond covers double or more bonds.

Answer:

• pH = 3.0

• pH = 2.70

• pH = 3.61

• pH = 8.28

• pH = 1.40

Explanation:

El pH es una medida en química usada para determinar el grado de acidez o basicidad en una solución.

Se define como:

pH = -log₁₀ [H⁺]

El - logaritmo de la concentración molar de H⁺

Para las concentraciones de H⁺ dadas:

• [H+] = 0.001 M

pH = -log (0.001M) = 3

pH = 3.0

• [H+] = 0.002 M

pH = -log (0.002M)

pH = 2.70

• [H+] = 2.45X10-4 M

pH = -log (2.45X10-4 M )

pH = 3.61

• [H+] = 5.2X10-9 M

pH = -log (5.2X10-9 M)

pH = 8.28

• [H+] = 0.04 M

pH = -log (0.04M)

pH = 1.40

Answer:

answer is in the link because it says my answer contains inappropriate words

Explanation:

Answer: The concentration of a solution made by combining 52 grams of  \(NaCH_{3}COO^{-}\) with 150 mL of water is 4.22 M.

Explanation:

Given: Mass = 52 grams

Volume = 150 mL (1 mL = 0.001 L) = 0.150 L

Molarity is the number of moles of a substance present in liter of a solution.

And, moles is the mass of a substance divided by its molar mass.

Hence, moles of \(NaCH_{3}COO^{-}\) (molar mass = 82.034 g/mol) is as follows.

\(Moles = \frac{mass}{molar mass}\\= \frac{52 g}{82.034 g/mol}\\= 0.633 mol\)

Therefore, concentration of given solution is as follows.

\(Molarity = \frac{moles}{Volume(in L)}\\= \frac{0.633 mol}{0.150 L}\\= 4.22 M\)

Thus, we can conclude that the concentration of a solution made by combining 52 grams of  \(NaCH_{3}COO^{-}\) with 150 mL of water is 4.22 M.

Answer:

Explanation:

Evaporation and condensation

Hope dis helps!

Answer:

Electrons create colors in a line-emission spectrum by absorbing energy and undergoing electronic transitions between different energy levels in atoms or ions. The specific energy differences between these levels determine the wavelengths or colors of light emitted, resulting in the characteristic lines observed in the spectrum.

Explanation:

Electrons create the colors in a line-emission spectrum through the process of electronic transitions in atoms or ions. When an electron in an atom absorbs energy, it can move to a higher energy level or excited state. This energy is typically supplied by heat, light, or an electric current.

As the electron remains in the excited state, it is considered unstable and tends to return to its original energy level. During this transition, the electron releases energy in the form of light. The specific color of light emitted depends on the energy difference between the excited state and the ground state of the electron.

Each energy level in an atom has discrete energy values. When an electron transitions from a higher energy level to a lower energy level, the energy difference corresponds to a specific wavelength or color of light. This emitted light can be observed as a line or specific color in a line-emission spectrum.

The line-emission spectrum represents the distinct wavelengths of light emitted by an atom or ion as its electrons transition between different energy levels. Each line in the spectrum corresponds to a specific electronic transition and is associated with a unique color.

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Answer:

Carbon dioxide and water.

Explanation:

If there isn't carbon dioxide, photosynthesis wouldn't happen as carbon dioxide is needed to transfer into the plant and after that the oxygen travels into the surroundings from the plant. There isn't any water, the plant wouldn't be able to make food called glucose.

Answer: 12

Explanation: 18mL 14L(1.6x10-2) 23ml 12L

1 Milliliter (mL) is equal to 0.001 liter (L)

1.6x10-2= 14  you see my point?

18 and 23 are both mL so bye bye 14 bigger then 12 so there

The answer is dipole-dipole and dipole-induced dipole forces.

The dipole-induced dipole is a kind of interaction induced by a polar molecule by disturbing the arrangement of electrons.

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Answer:

Point A, Point B, and Point C

Explanation:

Collinear points means that they share the same line. Points A, B, and C all share the line m.

True.

The Mass Undergoes change only in ( Solid state to liquid state ) Ice Cube to Water .

Mass changes from mg to litre.

\(\huge\mathfrak\red{hope \: it \: helps}\)

The correct answer is C. the reaction temperature will be maintained at approximately 100°C.

When a reaction mixture is heated at reflux, the temperature of the mixture will be maintained at the boiling point of the solvent.Reflux is a process that involves condensing vapours and transferring the resulting condensate back to the system it originally came from. It is employed in both commercial and academic distillations. Moreover, it is employed in chemistry to provide long-lasting reactions with energy. For example, if the reaction mixture is heated with water, the temperature will be kept at 100°C. Therefore, when heating a reaction mixture at reflux, the reaction temperature will be maintained at approximately 100°C.

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Answer: a mercury thermometer is better to measure very small changes in temperature

Explanation:

i took the test and got it right

Answer:

the answer is C, a mercury thermometer is better to measure very small changes in temperature.

Explanation:

i just took the test and it was correct :)

E(343C)

Final temperature at 9L is 343C or 616K

We can solve this question using Charles law:

At constant pressure, Volume(in L) is directly proportional to temperature(in Kelvin).

                               V/T= constant

Given,

At 35c=273+35= 308K, volume= 4.5L

Current volume=9L

As per above law,

308k/4.5L=T/9L

⇒T= (9*308)/4.5 (in K)

⇒T= 2*308

∴T = 616K or 343C(616-273=343)

Hence final temperature =616K/343C

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The pattern of chlorophyll in leaves depends on the exposure to light, with leaves kept in the light having a higher and more uniform chlorophyll content compared to those kept in the dark.

The pattern of chlorophyll in leaves differs significantly when comparing a leaf kept in the dark versus a leaf kept in the light. Chlorophyll is the pigment responsible for the green color in plants and plays a crucial role in the process of photosynthesis. In the presence of light, chlorophyll absorbs energy, allowing plants to convert carbon dioxide and water into glucose and oxygen.
When a leaf is kept in the light, its chlorophyll content is higher as the plant actively engages in photosynthesis. The distribution of chlorophyll in the leaf is typically more uniform, allowing for efficient light absorption and energy conversion.
In contrast, a leaf kept in the dark experiences a decrease in chlorophyll content due to the absence of light. Without light, the plant cannot undergo photosynthesis, leading to a reduced need for chlorophyll. As a result, the pattern of chlorophyll in the darkened leaf becomes less uniform, and the leaf may lose its vibrant green color, becoming pale or even yellow over time. This process is known as etiolation.
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Answer:

There will be 2 nitrogen and 2 oxygen atoms in the product.

Explanation:

In a chemical reaction, atoms are neither created or destroyed, which means if there are 2 nitrogen atoms in the reactants, there will be 2 nitrogen atoms in the products. Similarly, if there are 2 oxygen atoms in the reactants, there will be 2 oxygen atoms in the products.

Let me know if this helps!

Answer:

bussy

-/////////////-

Explanation:

Answer: its asking for what gases make up that planet

Explanation:

for example: jupiter is made up of 90% hydrogen ~10% helium and <1% hydrogen.

Answer:

The answer is

Explanation:

The mass of a substance when given the density and volume can be found by using the formula

From the question

Density of aluminum = 2.00 g/mL

volume = 29.8 mL

The mass is

mass = 2 × 29.8

We have the final answer as

Hope this helps you

Answer:

limitting reactant = 7.79g

excess reactant = 16.517g

percentage yild =145.05%

Explanation:

you can read and understand from the image okey

According to the stoichiometry of the chemical equation, 0.895 moles of aluminium metal is needed to produce 500. g of Iron.

It is the determination of proportions of elements or compounds in a chemical reaction. The related relations are based on law of conservation of mass and law of combining weights and volumes.

Stoichiometry is used in quantitative analysis for measuring concentrations of substances present in the sample.

53.96 g Al gives 111.68 g Fe thus 50 g Fe requires 50×53.96/111.68=24.15 g which is 24.15/26.98 = 0.895 moles.

Thus,  0.895 moles of aluminium metal is needed to produce 500. g of Iron.

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Step 2 is the rate-determining step as it is the slowest step in the proposed mechanism.

The observed rate law for the reaction is consistent with the proposed mechanism.

The rate law for the overall reaction can be determined by summing the stoichiometric coefficients of the rate-determining step. From the proposed mechanism, the rate-determining step is N₂O₂ + H₂ ⟶ N₂0 + H₂O (Step 2).

The overall stoichiometry of the reaction is:

N₂O₂(g) + H₂(g) ⟶ N₂0(g) + H₂O(g)

The rate law for the overall reaction is given by:

Rate = k [N₂O₂] [H₂]

The overall reaction involves the reaction of NO and H₂, and it is observed that the rate of the reaction is proportional to the concentrations of both NO and H₂. In the proposed mechanism, the rate-determining step involves both NO and H₂. Therefore, the rate law is consistent with the proposed mechanism.

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The voltage across the 200 ohm circuit element, that draws a current of 4 A, is equal to 800 volts.

To find the voltage across a circuit element, take Ohm's Law, according to which the resistance (R) of a resistor is equal to the product of the current (I) that flows through it and the voltage (V) across it.

Use the values:

Current (I) = 4 A

Resistance (R) = 200 Ω

Using the formula of Ohm's Law:

V = I × R

V = 4 A × 200 Ω

V = 800 V

Voltage is  800 V.

Thus, the voltage across the 200 ohm circuit element, that draws a current of 4 A, is 800 volts.

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The equilibrium composition of CO₂ is determined to be 0.59 kmol.

To solve this problem, we can use the ideal gas law and the equilibrium constant expression for the reaction:

CO + 1/2O₂ ⇌ CO₂

Given the initial number of moles of CO and O₂, we can set up an ICE (Initial, Change, Equilibrium) table. Let's assume that x kmol of CO is consumed and converted to CO₂. Then, the change in the number of moles for each species is:

CO: -x kmol

O₂: -0.5x kmol

CO₂: +x kmol

At equilibrium, the number of moles of CO is (2 - x) kmol, O₂ is (3 - 0.5x) kmol, and CO₂ is x kmol. The equilibrium constant expression can be written as:

Kp = (P_CO₂) / (P_CO * P_O₂(1/2))

Given Kp = 16.461 and the pressure conditions, we can substitute the equilibrium partial pressures into the expression:

16.461 = x / ((2 - x) * (3 - 0.5x)(1/2))

Solving this equation yields x ≈ 0.59 kmol.

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The aqueous solution that will have the lowest freezing point is option d. 0.050 m CH₃COOH.  (D)

This is because the freezing point of an aqueous solution is lowered by the addition of solutes. The solutes most effective at lowering the freezing point are ionic solutes.

0.050 m CH₃COOH is the only ionic solute in the given answer choices, making it the most effective at lowering the freezing point.

This is because ionic solutes dissolve in water to form ions that interact with the water molecules, thus lowering the freezing point. Therefore, option d. 0.050 m CH₃COOH is the solution that will have the lowest freezing point.

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Answer:

Sodium

Formula : Na

Equivalent mass:23.0

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In a 2.50-L container with 56 g each of nitrogen and carbon dioxide gases added at 25°C, the partial pressure of nitrogen gas is 4.89 atm. The root mean square speed of an A₂ molecule at 0°C is approximately 8.65 m/s. None of the given options are correct.

Q1. We need to find the partial pressure (atm) of nitrogen gas in a 2.50−L container into which 56 g of each nitrogen and carbon dioxide gases are added at 25°C. Let's begin:
56g of N₂ will be equal to moles of N₂ = (56/28) = 2 mol N₂
56g of CO₂ will be equal to moles of CO₂ = (56/44) = 1.27 mol CO₂

Total moles of gas = 2 + 1.27 = 3.27 moles
Molar mass of N₂ = 28 g/mol
Ideal Gas equation = PV = nRT
Partial pressure of N₂ = P_N₂ = (n_N₂ * RT) / V
Where,
n_N₂ = number of moles of N₂ = 2 mol
R = gas constant = 0.08206 L atm K⁻¹ mol⁻¹
T = temperature in kelvin = (25 + 273.15) K = 298.15 K
V = volume of container = 2.50 L

Substituting the values in the formula, we get:
P_N₂ = (2 mol * 0.08206 L atm K⁻¹ mol⁻¹ * 298.15 K) / 2.50 L
P_N₂ = 4.89 atm

Therefore, the partial pressure (atm) of nitrogen gas in a 2.50−L container into which 56 g of each nitrogen and carbon dioxide gases are added at 25°C is 4.89 atm.

None of the given options are correct.

Q2. We need to find the root mean square speed (m/s) of an A₂ molecule (atomic mass =6amu ) at 0°C. Let's begin:

The root mean square speed (v rms) of an ideal gas is given by the formula:
v rms = √(3RT / M)
Where,
R = gas constant = 8.314 J/mol K
T = temperature in kelvin = 0 + 273.15 K = 273.15 K
M = molar mass of the gas = 6 g/mol = 6 / 1000 kg/mol = 0.006 kg/mol

Substituting the values in the formula, we get:
v rms = √(3 * 8.314 J/mol K * 273.15 K / 0.006 kg/mol)
v rms = √(3 * 8.314 J/mol K * 273.15 K / 6 * 10⁻³ kg/mol)
v rms = √(74.81)
v rms = 8.65 m/s (approx.)

Therefore, the root mean square speed (m/s) of an A₂ molecule (atomic mass =6amu ) at 0°C is 8.65 m/s (approx.).

None of the given options are correct.

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Complete Question:

Q24: What is the partial pressure (atm) of nitrogen gas in a 2.50-L container into which 56 g of each nitrogen and carbon dioxide gases are added at 25°C ? A) 39.00 B) 39.10 C) 17.90 D) 19.55 B) 15200

Q25: Calculate the root mean square speed (m/s) of an A2 molecule (atomic mass =6amu) at 0°C. 4) 1506 B) 1.135×10⁶ C) 1065.0 D) 1065.3 E) 753

Answer:

I have attached the diagram