What are the following equations for each:

1. Ratio of product concentrations reactant concentrations at equilibrium.

2. Ratio of partial pressures of products to partial pressures of reactants (for gas phase reactions only) at equilibrium

3. Ratio of products reactants for the reaction of a weak base with water at equilibrium.

4. The thermodynamic equilibrium constant, calculated from thermodynamic data, not concentrations.

5. The autoionization constant for water (= 1.0 x 10-14).

6. Ratio of products reactants for the reaction of a weak acid with water at equilibrium

Answer:

There could be several possible reasons for a small gap between rails on a railway track, such as:

1. Expansion joints: Railways are designed to allow the tracks to expand and contract with changes in temperature. To accommodate this expansion, small gaps are left between the rail ends and filled with expansion joints or plates.

2. Wear and tear: Over time, the rails may experience wear and tear due to heavy loads, weather conditions, and other factors. As a result, small gaps can appear between the rails.

3. Maintenance: During maintenance activities, rail tracks may be adjusted or replaced, which could lead to small gaps between the rails.

4. Environmental factors: Environmental factors such as soil shifts, earthquakes or other natural disasters can also affect the alignment of the rails, leading to small gaps.

These are some of the possible reasons for a small gap between the rails on a railway track.

Answer:

The small gap left between the rails in a railway track is intentional and serves a specific purpose. This gap is known as the rail joint, and it allows for the expansion and contraction of the rails due to changes in temperature. When the temperature changes, the metal rails will expand or contract, and if they were joined together tightly, they could buckle or become deformed, which could be dangerous for trains passing over them. The rail joint allows the rails to move slightly and prevent damage to the track.

Additionally, the rail joint also allows for maintenance and repairs of the track. If there were no gap between the rails, it would be challenging to replace a damaged rail or perform routine maintenance, such as tightening bolts or lubricating joints. With the rail joint, maintenance personnel can easily access and work on the track.

Overall, the small gap left between the rails in a railway track is intentional and serves a crucial function in ensuring the safety and reliability of the track.

Answer: No they are not. "Pure substance" is supposed to be placed in the middle picture. "Homogenous mixture" is supposed to be placed in the right picture. "Heterogenous mixture" is supposed to be placed in the left picture.

Explanation:

Pure Substances:

There are two categories of pure substances: elements and compounds (In our case, we have a compound).

Element (e.g. the blue circles or the red squares):

Compound (e.g. the blue circles bonded together with the red squares in the middle picture):

Mixtures:

There are two categories of mixtures: homo- and hetero- genous.

Homogenous mixture:

Heterogenous mixture:

The second Image is not a homogenous mixture, it is a heterogenous mixture as two different types of elements are mixed together.

The mix of two different types of elements in the heterogenous mixture is not uniform and has uneven mixed types.

The third image is a homogenous mixture as even though two different types of elements are together, they are not mixed with each other.

Unlike in the heterogenous mixture, in a homogenous mixture, there is a uniform mix of two different types of elements.

The first image is correct, the image depicts a pure substance.

To understand better about the Substances:

https://chem.libretexts.org/Courses/Los_Angeles_Trade_Technical_College/Foundations_of_Introductory_College_Chemistry/04%3A_Matter/3.5%3A_Pure_Substances_and_Mixtures

Answer:B. since Phosphorus has an atomic mass of 30.974 (larger) than Magnesium which is 24.305 .

HOPE IT HELPS....

Answer:

rotting bananas

Explanation:

it takes time for bananas to rot while oil and fireworks combustion easier

The law of conservation of energy states that energy can neither be created nor be destroyed, but it can be transformed from one form to another.

So I considered an example of it as follows: water is stored at height with potential energy, the water flows, and its potential energy is converted into kinetic energy. It flows to rotate a turbine with mechanical energy. Then the kinetic energy is converted into electrical energy. In our house, the electrical energy is converted into luminous energy, heat energy, and so on.

But what happens after that?

Explanation:

In summary, the concepts of energy transformation and conservation provide a powerful framework to understand how energy moves through a system, how it changes forms, and how to ensure that the total energy remains constant throughout the process.

Energy transformation refers to the process of converting energy from one form to another. In any system, energy can exist in various forms, such as kinetic energy (energy of motion), potential energy (energy due to position or configuration), thermal energy (heat), chemical energy (stored in chemical bonds), electrical energy, etc. As energy moves through a system, it can undergo transformations, changing from one form to another.

Learn more about energy conversion here.

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d1 = 15 miles

t1 = 1 hour

d2 = 25 miles

t2 = 2 hours

d = 15 + 25 = 40 miles

t = 1 + 2 = 3 hours

\(avg. \: speed \: = \: \frac{total \: distance}{total \: time} \)

\(avg. \: speed \: = \frac{40}{3} \)

\(avg. \: speed \: = 13.33mi \: hr ^{ - 1} \)

Hello..!

There are 2 main types of ions one is an atom where the electrons are shared between the atoms. the other is an electron where one atom loses an electron to become a neutral in a charged ion, and the other atom gains the electron to become a charged lon anion.

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Ions with a positive charge are known as cations. Those that are negatively charged are called anions.

¿Doubts? in the comments Greetings.

The two main types of bonds formed between atoms are ionic bonds and covalent bonds. An ionic bond is formed when one atom accepts or donates one or more of its valence electrons to another atom. A covalent bond is formed when atoms share valence electrons.

Answer:

Living beings and non-living things both follows the physical and chemical general principles, like the thermodynamic laws, and they are constituted both by atoms and molecules, the basis of the natural organization of all known matter on Earth.

Answer: Matter is anything that has mass or takes up space, something non living is a rock something living is a tree

Explanation:

Answer:

Step because why not and I need points

Answer:

39

Explanation:

Relative mass does not need to be calculated as it is listed on the periodic table. Potassium's relative atomic mass is around 39.

Answer:

air

Explanation:

air has much less resistance than water, and echos are just propagating mediums

c. The atom becomes positively charged

if the electrons are removed it means theres no longer a negative charge to balance the positive charge of the protons in the atom

it formed before because it is deeper than all of them .

no it did not rock b is deeper than rock c therefore rock b was formed first

force = a push or pull

newton's 2nd law of motion = statement that force is equal to mass times acceleration

inertia = the property of matter that resists change in motion

mass = the measure of the amount of substance in a sample

newton's 1st law of motion = objects motion being constant unless acted upon by an unbalanced force

force a push or pull

2nd law of motion statement that force is equal to mass times acceleration

inertia the property of matter that resists change in motion

mass the measure of the amount of substance in a sample

1st law of motion objects motion being constant unless acted upon by an unbalanced force

Answer:  He needs to hit the ball with less force.

Explanation:

hope this helps

Answer: The sections of a lab report can vary between scientific fields and course requirements, but they usually contain the purpose, methods, and findings of a lab experiment. Each section of a lab report has its own purpose. 1. Title: expresses the topic of your study 2. Abstract: summarizes your research aims, methods, results, and conclusions

Explanation:

Answer:

Look it up

Explanation:

If you don't know then look it up

Answer:

253.02 kJ.

Explanation:

The balanced reaction for the decomposition of baking soda is

2 NaHCO3(s) → Na2CO3(s) + CO2(g) + H2O(g)

We can find the heat of reaction by using the Hess' Law. This is done by using this formula:

∑(Hf,products) -∑(Hf,reactants) = Heat of reaction

where Hf is the heat of formation. According to literature, these are the heats of formation for each of the compounds in the reaction:

NaHCO3: -947.68 kJ/mol

Na2CO3: -1130.94 kJ/mol

CO2: -393.51 kJ/mol

H2O: -241.8 kJ/mol

Applying Hess' Law:

[1(-1130.94) + 1(-241.82)] + 1(-393.51)] - [2(-947.68)] = 129.09 kJ

Thus, the heat of reaction is 129.09 kJ/mol NaHCO3. Since there is 1.96 mol of NaHCO3, the total heat of reaction is 253.02 kJ.

Answer:

Explanation:A chemical response is a chemical transformation in which two chemicals combine to create a third component.

(i) Adding diluted acid to an active metal causes the test tube to heat up and hydrogen gas to escape, which results in the production of heat.

(ii) When diluted hydrochloric acid is added to silver nitrate, AgCl, a white precipitate, results.

(iii) When water is added to quicklime, the mixture boils and produces heat along with a hissing sound.

(iv) Thermal breakdown of mercury oxide - Mercury turns from red to a metallic silver tint as a result of this process.