Which group has the highest ionization energies? Explain why.

Answer:

No, because the moon takes about 27 days to fully orbit which means that 3 weeks would not be enough to see all of the moon's phases, but if you think that you don't need 27 days due to the fact that some of the days there may not be a phase change then that is completely up to you.

Explanation:

Hope this helps:)...if not then sorry for wasting your time and may God bless you:)

Answer:

Explanation:

Does order matter in chemical formula?

When you write a chemical formula, there is a specific order of the elements. ... The Hill system states carbon atoms are listed first, hydrogen atoms next and then the number of all other elements in alphabetical order

Answer:

A. Single replacement

Explanation:

Na replaces Mg as the cation

A. The number of moles of water that were absorbed is 0.094 mole

B. The percentage of water in the hydrate is 25.4%

The number of mole water absorbed can be obtain as follow:

Mole = mass / molar mass

Mole of water = 1.70 / 18

Mole of water = 0.094 mole

We can obtain the percentage of water as follow:

Percentage of water = (mass of of water / mass of hydrate) × 100

Percentage of water = (1.7 / 6.7) × 100

Percentage of water = 25.4%

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Answer:

5.95 moles

Explanation:

No of moles = given mass / molar mass

No of moles = 137/23

= 5.95 moles

The third law of thermodynamics describes the entropy of a: solid.

The third law of thermodynamics states that the entropy of a pure crystalline substance approaches zero as the temperature approaches absolute zero (0 Kelvin or -273.15 degrees Celsius). This law implies that at absolute zero, a perfectly ordered and pure crystalline solid will have zero entropy.

The third law of thermodynamics is not specific to liquids or gases but applies to solids. In a solid, the molecules are highly ordered and have fixed positions in a regular lattice structure. As the temperature decreases towards absolute zero, the thermal motion of the molecules reduces, and the system becomes more ordered, resulting in a decrease in entropy.

In contrast, liquids and gases have higher entropy compared to solids at absolute zero because their molecules have more freedom of movement and are not as tightly arranged. Therefore, the third law of thermodynamics specifically addresses the entropy of solids and does not apply to liquids or gases.

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Answer:

10, True

Explanation:

Because weather is what conditions of the atmosphere are over a short period of time and climate is how the atmosphere behaves over a long period of time.

Answer:

8. Equator

9.

a. thermometer

b. manometer

c.hygrometer

d.Anemometers

10. True

Explanation:

The molar mass of potassium permanganate is approximately equal to 158.04 g/mol.

By summing the atomic masses of its constituent elements, the molar mass of potassium permanganate (KMnO4) may be computed.

Each element in KMnO4 has the following atomic masses:

Potassium (K) content: 39.10 g/mol

Manganese (Mn) content: 54.94 g/mol

Oxygen (O) : 15.99 g/mol (there are four oxygen atoms in KMnO4)

As a result, the molar mass of potassium permanganate may be computed as follows:

Molar mass of KMnO4 = (1 x  atomic mass of K) + (1 x  atomic mass of Mn) + (4 x  atomic mass of O) 

= (1 x 39.10 g/mol) + (1 x 54.94 g/mol) + (4 x 15.99 g/mol)

= 39.10 g/mol + 54.94 g/mol + 63.96 g/mol

= 158.04 g/mol

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To calculate the amount of energy required to change the temperature of water, we can use the formula: Q = m * c * ΔT Where: Q is the amount of energy in joules, m is the mass of the water in grams.

c is the specific heat capacity of water in joules per gram per degree Celsius
ΔT is the change in temperature in degrees Celsius

Given:
m = 69.0 grams
c = 4.184 j/g°C
ΔT = (95.0 - 33.0)°C

= 62.0°C

First, let's convert the mass of water to kilograms by dividing it by 1000:
m = 69.0 grams ÷ 1000

= 0.069 kg

Now, substitute the values into the formula:
Q = 0.069 kg * 4.184 j/g°C * 62.0°C

Simplifying the equation:
Q = 0.069 kg * 4.184 j/g°C * 62.0°C
Q = 0.069 kg * 4.184 j/g°C * 62.0°C
Q = 0.069 kg * 260.368 j/g

To convert the result from joules to kilojoules, divide by 1000:
Q = (0.069 kg * 260.368 j/g) ÷ 1000
Q = 18.0 kj


Therefore, 18.0 kilojoules of energy must be added to 69.0 grams of water to change the temperature from 33.0°C to 95.0°C.
To calculate the amount of energy required to change the temperature of water, we use the formula Q = m * c * ΔT. In this formula, Q represents the amount of energy in joules, m is the mass of the water in grams, c is the specific heat capacity of water in joules per gram per degree Celsius, and ΔT is the change in temperature in degrees Celsius.

Given that m = 69.0 grams,

c = 4.184 j/g°C,

and ΔT = (95.0 - 33.0)°C

= 62.0°C, we can substitute these values into the formula.

First, we convert the mass of water to kilograms by dividing it by 1000. Then, we multiply the mass, specific heat capacity, and change in temperature to calculate the energy in joules. Finally, we convert the result from joules to kilojoules by dividing by 1000. The final answer is that 18.0 kilojoules of energy must be added to 69.0 grams of water to change the temperature from 33.0°C to 95.0°C.

The energy required to change the temperature of 69.0 grams of water from 33.0°C to 95.0°C is 18.0 kilojoules.

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Approximately 0.183 kilojoules of energy must be added to the water to change the temperature from 33.0°C to 95.0°C.

To calculate the amount of energy needed to change the temperature of the water, we can use the formula:

q = m * c * ΔT

Where:
q is the energy required (in kilojoules)
m is the mass of the water (in grams)
c is the specific heat capacity of water (4.184 J/g°C)
ΔT is the change in temperature (in °C)

First, we need to convert the mass of water from grams to kilograms by dividing by 1000:
69.0 grams ÷ 1000 = 0.069 kg

Next, we can calculate the change in temperature:
ΔT = final temperature - initial temperature
ΔT = 95.0°C - 33.0°C = 62.0°C

Now, we can substitute the values into the formula:
q = 0.069 kg * 4.184 J/g°C * 62.0°C

To convert the answer to kilojoules, we divide by 1000:
q = (0.069 kg * 4.184 J/g°C * 62.0°C) ÷ 1000

Simplifying the equation:
q = 0.1826 kJ

Therefore, approximately 0.183 kilojoules of energy must be added to the water to change the temperature from 33.0°C to 95.0°C.

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Answer:

This is due to the very slow wobble of the axis of Earth. Which change is most likely to occur because of the movement of the axis? Winter and summer months will reverse

Explanation:

hope its help you

Answer:

0.6145M

Explanation:

Based on the chemical equation, 2 moles of MnO₄⁻ reacts with 5 moles of H₂C₂O₄.

To solve this problem, we need to find moles of MnO₄⁻, with the chemical equation the moles of H₂C₂O₄ and, the concentration of this solution.

Moles MnO₄⁻:

24.98mL = 0.02498L * (0.1968mol / L) = 4.916x10⁻³ moles MnO₄⁻

Moles H₂C₂O₄:

4.916x10⁻³ moles MnO₄⁻* (5 moles H₂C₂O₄ / 2 moles MnO₄⁻) =

0.01229 moles H₂C₂O₄

Molarity H₂C₂O₄:

0.01229 moles H₂C₂O₄ / 0.0200L =

Sodium bicarbonate has a 250 mg/ml concentration in the stock solution.

The right amount of a pure solid or pure liquid must be measured out, weighed, and placed in the appropriate flask before being diluted to the required volume to create a stock solution. The reagent can be measured using a variety of techniques depending on the required concentration unit.

C1V1 = C2V2

We are given that:

V1 = 3 L

V2 = 5 L

C2 = 150 mg/ml

C1(3 L) = (150 mg/ml)(5 L)

Simplifying, we get:

C1 = (150 mg/ml)(5 L) / (3 L)

C1 = 250 mg/ml

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The question requires us to complete the sentences regarding characteristics and properties of lipids.

First, we need to keep in mind what are lipids: these essential molecules to cell's membranes are typically made of a glycerol backbone, fatty acid "tails" (the hydrofobic part) and and a phosphate group (a hydrophilic part). The term "lipids" is commonly used as a synonym for "fats", which it isn't completely wrong as they share many properties (for example, lipids don't mix with water).

As they are organic molecules, all lipids have carbon, oxygen and hydrogen in their structure, while some of them can contain other elements (such as phosphorus for the phospate group and nitrogen).

Considering the information above, we can complete the sentences as:

1. "Lipids is a general term describing organic molecules that are insoluble in water".

2. "All lipids are made of carbon, hydrogen and oxygen, while some lipids contain other elements..."

Answer:

propyl

1-propylmethane or 2-methylpropane

Answer:

I think its b part or none of above

Answer:

A. Wood logs are burned in a fire

Explanation:

To solve this, we must know each and every concept behind physical change and Chemical change. Therefore, thee correct option is option A that is wood logs are burned in a fire.

A physical change is characterized by a differences in physical attributes. Melting, transformation to a gas, changes in strength, change in durability, changes in crystal structure, texturing change, shape, color, volume, and density are all examples of physical qualities. Tempering steel to make a knife blade is an instance of a physical change.

Chemical change is a reaction in which breaking and forming of new bonds take place. One molecule completely converted to totally different molecule. The number of atoms remains same

Therefore, thee correct option is option A that is wood logs are burned in a fire.

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Two advantages of a galvanic cell, as described in the model, compared to inserting a zinc bar into a Cu^2+ solution are:
1. Controlled redox reaction: In a galvanic cell, the redox reaction between zinc and Cu^2+ occurs in a controlled manner through an external circuit. This prevents direct contact between the reactants and allows the reaction to proceed at a manageable rate, generating a stable electrical current.
2. Electricity production: A galvanic cell is designed to harness the energy released during the redox reaction and convert it into usable electrical energy. This allows for practical applications, such as powering devices or storing energy in batteries, which isn't possible with a simple insertion of a zinc bar into a Cu^2+ solution.

A galvanic cell, as described in the model, has two key advantages compared to simply inserting a zinc bar into a Cu^2+ solution.
Firstly, a galvanic cell is able to produce a sustained flow of electrical current, whereas simply inserting a zinc bar into the solution only creates a brief flow of current. This is because a galvanic cell involves the use of two different electrodes (one anode and one cathode) that are connected by a wire, which allows for a continuous flow of electrons between them.
Secondly, a galvanic cell is able to maintain a consistent voltage output over time, whereas the voltage produced by a zinc bar in a Cu^2+ solution would quickly diminish. This is because a galvanic cell involves the use of a salt bridge, which helps to maintain a constant flow of ions between the two electrodes.
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Answer:

c tarnishes in air

Explanation:

After silver has been exposed to air that contains sulphur gases, discoloration would occur. there would be darkening that is caused by the reaction with gases.When any silver object tarnishes, it brings about a disfiguring of that object. Hydrogen sulphide would be needed for this to happen. silver sulphide is black and a if a thin layer should form on any surface, it ill darken it. This  is what we refer to as tarnishing.

Answer:

c

Explanation:

it tarnishes in air

Answer:

There are four types of consumers: omnivores, carnivores, herbivores and decomposers. Herbivores are living things that only eat plants to get the food and energy they need. Animals like whales, elephants, cows, pigs, rabbits, and horses are herbivores. Carnivores are living things that only eat meat.

Explanation:

Given that a sample of carbon dioxide gas occupies a volume of 250 ml at 25°c. We need to find the volume that it will occupy at 95°c.Therefore, we will use the combined gas law equation that relates temperature, volume, and pressure of a gas.

It states that:`(P₁V₁)/T₁ = (P₂V₂)/T₂`where P₁, V₁, and T₁ are the initial pressure, volume, and temperature, respectively. P₂, V₂, and T₂ are the final pressure, volume, and temperature, respectively.Let us substitute the given values of the sample of carbon dioxide gas in the above equation and get the volume that it will occupy at 95°c.`P₁ = P₂` (since it is the same sample of gas)`V₁ = 250 ml``T₁ = 25°c + 273.15 = 298.15 K``T₂ = 95°c + 273.15 = 368.15 K`Now, substituting all the values into the formula:`(P₁V₁)/T₁ = (P₂V₂)/T₂`(1 × 250)/298.15 = (1 × V₂)/368.15V₂ = 309.84 mlTherefore, the sample of carbon dioxide gas will occupy a volume of 309.84 ml at 95°c. The final volume of the gas is 309.84 ml.

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Answer: The box is moving downward with increasing speed.

Explanation:

The diagram models the forces acting on a box. 2N 2N- Box - 2 N 5 N .The box is moving downward with increasing speed best describes the motion of the box.

The normal force acting on the box is equal to and opposite to its weight. This term equals the force of gravity when the box is on a level surface. To calculate the normal force of the box, use our given mass and gravity's acceleration.

When an object interacts with another object, it experiences a push or pull that causes it to change state, either from rest to uniform motion. It is a magnitude and direction vector quantity.

A representation of the forces acting on the object. The object is represented by a dot, and forces are represented by arrows pointing away from the dot. Force diagrams are another name for them.

Thus, The box is moving downward with increasing speed best describes the motion of the box.

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Answer:

kjdbfskfgshfk skjdbfsk dskjbf dskjbsd dkvhsf akb

Explanation:

Answer:

modelo de Bohr

Explanation:

En el modelo de Bohr del átomo, los electrones viajan en órbitas circulares definidas alrededor del núcleo. Las órbitas están etiquetadas por un número entero, el número cuántico n. Los electrones pueden saltar de una órbita a otra emitiendo o absorbiendo energía.

Answer:

carbon...?

Explanation:

Answer:

Carbon

Explanation:

Carbon makes up most of the building blocks of life.  Hope that is right. Good luck

Answer:   Presenting a presentation in a style similar to that used in casual conversation is called conversational quality or a(n) extemporaneous speaking style.

Explanation:

Extemporaneous speaking style refers to a presentation or speech that is delivered in a conversational manner, similar to the way people naturally speak in casual conversations. It involves speaking spontaneously, without relying heavily on scripted content or strict memorization. Instead, the speaker maintains a general outline or key points and adapts their language and delivery based on the audience's response and engagement.

An extemporaneous speaking style often includes elements of informality and a more relaxed tone, which can help create a connection with the audience and make the presentation feel more engaging and natural. It allows the speaker to express their ideas in a fluid and conversational manner, rather than sounding robotic or monotone.

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Gravity acts towards the center of the earth. Gravity can not be stopped

While other fundamental forces, such as electromagnetic force, can be either attractive or repulsive depending on the charges involved, gravity is always attractive. This means that any two objects in the universe with mass will be attracted to each other.

Every object in the universe with mass is affected by the force of gravity. This makes it a universal force that plays a key role in the behavior of the cosmos.

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Explanation:

Atoms in the equation are already in balance.

Answer:

it is d, got it right on EDG

Explanation:

Answer:

mass number- 7 (round it to 7

Explanation: