if magnesium nitrate and sodium hydroxide are reacted together, what is the resultant colorless jelly-like precipitate that forms?

I think it's c I'm not sure

Answer: d

Explanation:

The red colour is the limiting reactant.

Red-blue colour ball and two white balls attached together are reactants.

Red-blue colour ball and two white and one red colour ball attached to each other are products.

The reactant that is entirely used up in a reaction is called a limiting reagent.

A reactant is a substance that is present at the start of a chemical reaction. The substance(s) to the right of the arrow are called products.

A product is a substance that is present at the end of a chemical reaction.

Hence,

The red colour is the limiting reactant.

Red-blue colour ball and two white balls attached together are reactants.

Red-blue colour ball and two white and one red colour ball attached to each other are products.

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There are approximately 0.0387 moles of iron in 2.34 × 10^22 iron atoms.

To calculate the number of moles of iron, you can use Avogadro's number, which states that there are approximately 6.022 × 10^23 atoms in one mole of a substance.

First, let's determine the number of moles of iron atoms in 2.34 × 10^22 iron atoms:

Number of moles = (Number of atoms) / (Avogadro's number)

Number of moles = (2.34 × 10^22) / (6.022 × 10^23)

≈ 0.0387 moles

As the temperature decreases, the kinetic energy of the iron atoms decreases, and eventually, they are no longer able to overcome these intermolecular forces. As a result, they begin to settle into a regular crystal lattice, and the iron solidifies.

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Answer:

\( \huge{5.77 \times {10}^{ - 5} m}\)

Explanation:

The wavelength of a wave can be found by using the formula

\(\lambda = \frac{c}{f} \\\)

where

c is the speed of the wave

f is the frequency

From the question we have

\( \lambda = \frac{3 \times {10}^{8} }{5.2 \times {10}^{ 12} } \\ \\ \\ \\ \large{ = 5.77 \times {10}^{ - 5} m}\)

Hope this helps you

Part of the investigation must be measuring the pressure inside the lighter fuel tank.

The pressure of gas measures how compact the gas molecules are. We know that the more compacted the gas molecules are, the more likely the gas will exist in the liquid state.

Hence, part of the investigation must be measuring the pressure inside the lighter  fuel tank.

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Answer:

24 H

6 N

Explanation:

3 × (4 × 2) = 24 H

3 × 2 = 6 N

After understanding the food chain, we realize that how one organism is dependent upon another organism for survival. Here among the given organisms, seagulls receives the energy last. The correct option is D.

A food chain refers to the order of events in an ecosystem, where one living organism eats another organism, and later that organism is consumed by another larger organism. The flow of nutrients and energy from one organism to another occurs at different trophic levels.

The food chain consists of sequential stages which are called the trophic levels. A food chain starts with the producers which utilize large amount of energy from the sun and the decomposers which are the last part needs less energy.

Decomposers get energy from dead materials. Here Seagulls comes last, so it receives less amount of energy.

Thus the correct option is D.

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Answer:

A

Explanation:

Answer:

true

Explanation:

In a conversation between myself and a friend about a job agency and its reliability, we would discuss the following points:

1. Friend: "Hey, have you heard about the XYZ Job Agency? I'm considering using their services to find a new job."

2. Me: "Yes, I have heard of them. They are known for connecting job seekers with potential employers. They specialize in various industries, which is a plus. However, it's essential to research their success rate and client feedback to determine their reliability."

3. Friend: "That's a good idea. I'll look into their reviews and testimonials to see what others have experienced with their services."

4. Me: "Another important aspect to consider is the type of positions they primarily offer. Are they mainly temporary roles or long-term positions? Depending on your career goals, this information could be crucial in your decision-making process."

5. Friend: "True, I'll make sure to check the job types they provide. I'm looking for something stable and long-term."

6. Me: "Lastly, you might want to inquire about any fees or charges associated with using their services. Some job agencies charge the job seeker, while others receive their payment from the employer. This could impact your overall experience with the agency."

7. Friend: "Thanks for the advice. I'll definitely consider all these factors before deciding whether to use the XYZ Job Agency. I appreciate your input!"

By following this conversation, we covered the key aspects of a job agency's reliability, such as their success rate, client feedback, job types offered, and fees associated.

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Answer: When an inert gas is added to the system in equilibrium at constant pressure, then the total volume will increase.

Explanation:

Answer

b. Oil, water, chloroform.

Explanation

Between water, chloroform, and oil, chloroform is the most dense substance (1.5 g/cm3), followed by water which has a density of 1.0 g/cm3. The least dense substance is oil with density of 0.9 g/cm3. Therefore, the oil will be at the top, followed by water, then chloroform will be at the bottom.

The fluids layered from top to bottom are oil, water and chloroform. Therefore, the correct option is option B.

A fluid is defined as a substance that has the ability to flow and conform to its surroundings. They can be found in both liquids and gases, among other forms. Liquids, like water, have a specified volume but no clear shape, whereas gases, like the air, have neither a specific volume nor shape. We need fluids to survive every day. Since water makes up the majority of the fluid in our bodies, they are essential for our survival. Fluids are also essential in many industrial processes, such as manufacturing, energy production, and transportation.

Therefore, the correct option is option B.

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Answer:

12.01 grams per mole

Explanation:

theres no sample or example so if theres grams of Carbon, convert it to moles using 12.01g/mol

Answer:

EtOH stands for ethyl alcohol, which is the type of alcohol found in alcoholic beverages such as beer, wine, and spirits. It is a central nervous system depressant that can cause a range of effects, from mild relaxation to severe impairment of cognitive and motor functions. EtOH is often used in the medical and research fields as a short notation for Ethanol.

EtOH is the chemical label or acronym for ethyl alcohol (ethanol). EtOH refers to the kind of alcohol that can be found in alcoholic beverages like wine, beer, and spirits.

It is a depressant of the central nervous system that can have a variety of effects, ranging from mild relaxation to severe cognitive and motor impairment. In the medical and research industries, EtOH is frequently used as a short notation for ethanol.

It is used in the production of other chemicals, as a solvent, and in alcoholic beverages. Ethanol is a colorless, somewhat toxic substance. Solutions of ethanol and water that contain more than 50% ethanol are extremely flammable. The most well-known use of ethanol is as alcohol in alcoholic beverages.

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Answer:

An objects accelarates in the same direction as that of the force applied.

Explanation:

Answer:

1. 1.72 moles of potassium.

2. All of the answers are true

3. Are used up during a reaction

Explanation:

Recall that the number of moles is obtained from;

Number of moles= Mass of potassium/ molar mass of potassium

Mass of potassium= 67 g

Molar mass of potassium= 39 gmol-1

Number of moles of K= 67 g/ 39 gmol-1

Number of moles = 1.72 moles of potassium.

2. When we look at all the options, we will realize that all the options are true. The rate of reaction doubles for each 10°C rise in temperature, increasing reactant concentration increases particle collision and ultimately increases the rate of reaction. Rate of reaction deals with rate of disappearance of reactants or rate of appearance of products.

3. Catalysts remain unchanged in a chemical reaction because they do not actually participate in the reaction. Hence they are not used up in any chemical reaction.

Answer: Homogeneous mixture

Explanation:

Because mixture can be separated by physical methods and homogeneous are uniformly appearances

Answer:

A scientific theory is a widely accepted belief on why something happens in the natural world while a scientific law is proven to a fact that shows what happens.

Explanation:

Dew forms on the grass in the early morning due to the process of condensation.

During the day, the sun heats up the ground and the air around it. When the sun sets, the ground and the air begin to cool down. As the air cools, its ability to hold moisture decreases. When the temperature drops below the dew point, which is the temperature at which the air is saturated and cannot hold any more moisture, the excess moisture in the air condenses into liquid water droplets. These droplets then collect on cool surfaces, such as grass, forming dew.

The grass is a good surface for dew to form on because it is usually cooler than the surrounding air due to transpiration, the process by which water evaporates from the leaves and stems of plants. This causes the grass to cool down faster than the air around it, making it more likely for dew to form on its surface.

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Answer:

Subconscious - psychic activity just below the level of awareness

Election - the act of electing someone

Explanation:

I hope this helped enough, good luck in chemistry!

Answer:

Different compounds are formed.

Explanation:

Due to this switching of chemicals, the result of both beakers will be different because the chemicals react with the different solution in the beaker. The composition of both chemicals are different from one another which produces different compounds or products when they are mixed with the solution so we can say that this switching of chemicals will definitely affect the results of the experiment. The student will observe the formation of different compounds and different colour of the solution.

The original concentration of the \(Li^{+}\) calculated is 0.99 m M when a sample of the serum which gave a reading about the 388 units for the intensity of the 671 nm of the red emission light.

We have to determine the original concentration of the \(Li^{+}\) in serum from the given sample.

initial concentration, I(x) = 484

484 = k [\(Li^{+}\)]

The initial concentration of the lithium ion + the standard of concentration

=> I (x + s) = 978

=> 978 = k x { [\(Li^{+}\)  standard] * (V standard/ V total) } +k { [\(Li^{+}\) serum] * (V initial/ V total) }

=> 484 = k*[\(Li^{+}\) serum],

=> 978 = k x { [11.1] * (1 mL/ 10 mL) } + 484 x (9 mL/ 10 mL)

k = 488.65

484 = 488.65 x [\(Li^{+}\)]

[\(Li^{+}\)] = 0.99 m M

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Hypoxic areas, such as those found in the Gulf of Mexico, develop primarily due to option C: die-off from a large phytoplankton bloom uses up the oxygen in water. The correct option is C.

Phytoplankton blooms occur when there is an excessive growth of microscopic algae in the water, often caused by high nutrient levels, such as nitrogen and phosphorus.

These blooms can create dense layers of algae on the water surface. As the algae die and decompose, bacteria consume the organic matter and consume oxygen in the process, leading to a decrease in oxygen levels in the water.

This process is known as eutrophication, and it can deplete oxygen concentrations to a critical level, resulting in hypoxic conditions.

Oxygen levels below 5ppm (option A) can contribute to hypoxia, but the primary cause is the consumption of oxygen by the decomposition of organic matter from the phytoplankton bloom (option C).

Nitrate additions (option B) and the presence of methyl-mercury (option D) can have additional negative impacts on aquatic ecosystems, but they are not the main drivers of hypoxia in this context. The correct option is C.

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Metallic bonding in sodium

When sodium atoms come together, the electron in the 3s atomic orbital of one sodium atom shares space with the corresponding electron on a neighboring atom to form a molecular orbital - in much the same sort of way that a covalent bond is formed.

Pathway #1 will give a higher yield because there is much less steric hindrance for primary substrates than for secondary substrates in the SN2 reaction, which is the first mechanism in each of the two pathways.

The SN2 reaction proceeds via a concerted, bimolecular, one-step mechanism, where the nucleophile attacks the electrophilic carbon center, and the leaving group is simultaneously displaced. In pathway #1, the SN2 reaction involves a primary substrate with a less hindered leaving group, which will react faster and give a higher yield.

On the other hand, pathway #2 involves a secondary substrate with a more hindered leaving group, which will react slower and give a lower yield. Hence, pathway #1 is more efficient because of the higher reactivity of the primary substrate and the less steric hindrance in the reaction mechanism.

Therefore, the pathway #1 will give a higher yield than pathway #2 in a multistep reaction pathway because there is much less steric hindrance for primary substrates than for secondary substrates in the SN2 reaction, which is the first mechanism in each of the two pathways.

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Answer:

V₂ = 5.97 L

Explanation:

Given data:

Initial temperature = 9°C (9+273 = 282 K)

Initial volume of gas  = 6.17 L

Final volume of gas = ?

Final temperature = standard = 273 K

Solution:

Formula:

The Charles Law will be apply to solve the given problem.

According to this law, 'the volume of given amount of a gas is directly proportional to its temperature at constant number of moles and pressure'

Mathematical expression:

V₁/T₁ = V₂/T₂

V₁ = Initial volume

T₁ = Initial temperature

V₂ = Final volume  

T₂ = Final temperature

Now we will put the values in formula.

V₁/T₁ = V₂/T₂

V₂ = V₁T₂/T₁  

V₂ = 6.17 L ×  273K /  282  k

V₂ = 1684.41 L.K / 282 K

V₂ = 5.97 L