is adding tomato sauce to pasta a chemical or physical change​

The relationship that can be expected between the pH of the inner thylakoid space, stroma, and cytosol of a plant cell is that the pH of the inner thylakoid space should be lower (more acidic) compared to the pH of the stroma and cytosol.

The pH (potential of hydrogen) is a measure of the acidity or alkalinity of a solution. In photosynthetic cells, such as plant cells, the thylakoid membrane is responsible for the light-dependent reactions of photosynthesis, while the stroma is where the light-independent reactions occur. The cytosol is the fluid portion of the cytoplasm.

During photosynthesis, a proton gradient is established across the thylakoid membrane, with protons being pumped into the thylakoid space. This proton accumulation results in a lower pH (more acidic) in the thylakoid space compared to the stroma and cytosol.

The proton gradient across the thylakoid membrane is crucial for ATP synthesis and the production of NADPH, which are essential energy carriers for the light-independent reactions in the stroma.

Therefore, it is expected that the pH of the inner thylakoid space would be lower (more acidic) compared to the pH of the stroma and cytosol due to the proton pumping and accumulation during photosynthesis.

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Answer:

a solute

Explanation:

a substance that dissolve in any solution

The solution is composed of two components called solute and solvent. The juice crystals dissolved in water are called the solute. Thus, option a is correct.

The solute is defined as the substances that are added to a solvent and are the minor component of the solution. It reacts with the solvent and produces a mixture.

The solution produced by adding the solute to the solvent can have more than one substance and can be homogenous or heterogeneous. The solute is in less amount than the solvent in a solution.

The solute is used to produce the solution and can be in the form of gas, solids, and liquids. Salt, sugar, carbon dioxide, ethanol, copper, etc, are some examples of solutes.

Therefore, option a. the juice crystals are solute.

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Answer:

gas production

Explanation:

Answer:

gas formation

Explanation:

frothy bubbles produced by carbon dioxide gas are a sign that a chemical reaction has occurred when a based is mix with acid.

Answer:

City B has the larger annual temperature range

Explanation:

This is correct option because generally the northern side of the equator is high in temperature than the southern hemisphere part.

Since the southern side of the equator or Southern Hemisphere, where city A resides will generally have higher altitude or rise, so this creates higher average temperature.

In a thermodynamics experiment, filtering the hot calcium hydroxide solution is necessary to removes any impurities or particulates that may be present in the solution that can affect the outcome of the experiment by introducing errors in the results.

In addition to this, filtering the hot calcium hydroxide solution also helps to ensure that the concentration of the solution remains consistent throughout the experiment. This is important because the concentration of the solution affects the thermodynamic properties of the solution, such as the temperature at which the reaction occurs. Without filtering, the concentration would vary depending on the amount of impurities present, and this could lead to inaccurate results.

Finally, filtering the hot calcium hydroxide solution also helps to prevent clogs or blockages in the equipment used for the experiment. If impurities are able to pass through the equipment, it could cause a disruption in the flow of the solution, which could affect the accuracy of the experiment.

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The gas occupies 900.0 ml at the temperature of the 27. 0 °C. The volume at the 132. 0 °C is the 4400 mL.

The expression for the volume and the temperature is as :

V₁ / T₁ = V₂ / T₂

Where,

The Initial temperature of the gas, T₁ = 27. 0 °C

The final temperature of the gas, T₂ =  132. 0 °C

The initial volume of the gas, V₁ = 900mL

The final volume of the gas, V₂ = ?

V₂ = V₁ T₂ / T₁

The V₁  = 900 mL

The T₁ = 27. 0 °C

The T₂ = 132. 0 °C

The V₂ = ?

V₂ = ( 900 × 132 ) /27

V₂ = 4400 mL

Thus, the final volume of the gas is 4400 mL.

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The mass of oxygen is 128 g

Given that a sample of gas consists of oxygen (molecular mass 32.0 g/mol) and neon (20.0 g/mol). The sample has a mass of 226 g and contains a total of 8.00 moles of gas. We are required to find the mass of oxygen in the sample.

Let us suppose that the number of moles of oxygen is x. Now, we know that the total number of moles of gas is 8 moles. Therefore, the number of moles of neon is (8 - x).

Molar mass of oxygen = 32 g/mol

We can calculate the mass of oxygen from the number of moles of oxygen and molar mass of oxygen as follows:

Number of moles of oxygen × Molar mass of oxygen = Mass of oxygenx × 32 = Mass of oxygen

Let us find the mass of oxygen:

Mass of neon = Total mass of gas – Mass of oxygen

226 – Mass of oxygen = Mass of neon

226 – Mass of oxygen = (8 – x) × 20

Simplifying the equation:

226 – Mass of oxygen = 160 – 20x + x

226 – Mass of oxygen = 160 – 19x

Mass of oxygen = 66 – 19x

The total number of moles of gas is 8 moles

Hence, Number of moles of oxygen + Number of moles of neon = Total number of moles of gasx + (8 - x) = 8⇒ 8 = 8Therefore, the value of x = 4

We can calculate the mass of oxygen as follows:

Number of moles of oxygen × Molar mass of oxygen = Mass of oxygen

4 × 32 = 128 g

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The diagrams have the following chemical structures in order: 4-propylhept-3-ene, 5-propyloct-2-ene, 2-butene, 6-ethyl-2,3,4,4-tetramethyloctane, 2,3-dimethylhexane.

Chemical structures are representations of molecules and compounds that show the arrangement of atoms and bonds in a molecule. They are a way to visually depict the chemical composition and connectivity of a substance.  They are essential for understanding the properties and behavior of molecules and compounds, and for designing new compounds with specific properties.

Chemical structures are useful in chemistry, biochemistry, biophysics and structural biology, to understand chemistry of compounds and synthesise new compounds from existing ones. Some chemical structures include the Lewis model, ball and stick models and space-filling models.

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Answer: Ionic attractions

Explanation:

Ionic bonding is a type of chemical bond that involves the electrostatic attraction between oppositely charged ions.

Because vanillyn alcohol involves intermolecular hydrogen bonding interactions rather than vanillin's weak interactions that result in a stable compound, vanillyn alcohol has a much higher melting point than vanillin.

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Answer:

i think it is A

Explanation:

i got this answer from a good friend

The magma deep below Earth's surface cool slowly.Large crystals form results from magma cooling deep below Earth's surface. Therefore, option A is correct.

Magma is the molten or semi-molten natural material that gives rise to all igneous rocks. Magma can be found beneath the Earth's surface, and evidence of magmatism has been discovered on other terrestrial planets and natural satellites.

When magma slowly cools deep within the crust, the resulting rock is known as intrusive or plutonic. Because of the slow cooling, crystals can grow large, giving intrusive igneous rock a coarse-grained or phaneritic texture. Individual crystals in phaneritic texture can be seen with the eye.

Intrusive igneous rocks form when magma slowly cools and solidifies beneath the Earth's surface. Large, well-formed crystals are found in intrusive igneous rocks such as granite, gabbro, diorite, and dunite.

Thus, option A is correct.

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1) Heat absorbed by water

q= heat absorbed

m= mass (grams)

c=specific heat of water is 4.18 J/g-°C

ΔT= final temperature - initial temperature

2) Plug in known values

3) Heat transferred.

Heat absorbed by water is the heat released by the sample.

4) Heat transfer by sample

q= heat transfer

m= mass (grams)

ΔHf=enthalpy of fusion

5) Plug in known values and solve for ΔHf.

The enthalpy of fusion of the sample is 43.18J/g.

Explanation:

the option 2 is correct

metals tend to have lower ionizatiin energy than non metals

Answer:

chemical composition

However, keep in mind that 20 mSv per year is the recommended amount for any radiation worker and is still regarded quite safe. This is the most radiation most of us will ever be exposed to.

after 1st half life , remaining sample would be 100/2=50 g

after 2nd half life , remaining sample would be 50/2=25 g

after 3rd half life , remaining sample would be 25/2= 12.5 g

The half-life of a radionuclide is the amount of time it takes for half of its radioactive atoms to decay. A decent rule of thumb is that you will have less than 1% of the initial quantity of radiation after seven half-lives. Click here to learn more about half life.

A short-term and whole-body dosage would result in rapid sickness, such as nausea and a reduction in white blood cell count, followed by death.

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42.08 years of  time must pass before there is an acceptable radiation level at the site.​

What is the half-life of a radioactive material?

The half life of a radioactive substance is the period of time during which its mass or number of atoms is decreased to half of what it was initially. The time it takes for a radioactive substance (or half of its atoms) to break down or transform into another substance is commonly used to define half-life.

Radioactivity, as its name suggests, is the act of generating radiation without any external cause. This is accomplished by an atomic nucleus that is unstable for whatever reason and "wants" to surrender some energy in order to change its configuration to one that is more stable.

After first half-life will remain 2560/2 i.e. 1280g of radioactive substance.

After second half-life will remain 1280/2 i.e. 640g

After 3rd half-life will remain 640/2 i.e. 320g

After 4th half-life will remain 160g

After 5th half-life will remain 80g

After 6th, 7th and 8th half-life will remain 40g, 20g and 10g respectively

It takes 8 half-lives to reach acceptable level of radiation i.e. 8*5.26 years

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Answer:

the final mole of the flexible container = 12.92 moles

Explanation:

Given that :

initial volume of a flexible container = 6.13 L

initial mole of a flexible container = 6.51 mol

final volume of a flexible container = 18.3 L

final mole of a flexible container = ???

Assuming the pressure and temperature of the gas remain constant, calculate the number of moles of gas added to the container.

Therefore,

\(n= \dfrac{V_2*n_1}{V_1}\)

\(n= \dfrac{18.3*6.51}{6.13}\)

n = 19.43

\(n=n_1+n_2\)

19.43 = 6.51 + n₂

n₂ = 19.43 - 6.51

n₂ = 12.92 moles

Thus; the final mole of the flexible container = 12.92 moles

Answer:

Smaller

Explanation:

I took the test

Answer:no

Explanation:as long as it’s not too much of it then no , it’s not bad . food coloring gets tested to be safe for human consumption so you’re good

Food coloring should be edible and safe on food (hence the name). If it's safe on food, then it should be safe to drink with water. Of course check with the label to be sure.

The two uses of dry ice include the following:

This is defined as a solid form of carbon dioxide and doesn't have a liquid state under normal atmospheric pressure. This is therefore the reason why it undergoes sublimation which involves the direct conversion of the solid phase to the gas phase.

Dry ice is used as a cooling agent in the preservation of substances via refrigeration etc and is also used in agriculture to speed up the growth of plants.

This is because plants need carbon dioxide for their photosynthetic activities and the aforementioned are therefore the appropriate uses of dry ice.

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Answer:

4, 3 , 2 and 6

Explanation:

The reaction equation is given as;

       NH₃  +  O₂   →    N₂   +   H₂O

Now, we need to balance the reaction equation;

     NH₃  +  O₂   →    N₂   +   H₂O

put the numbers a,b,c and d;

    aNH₃  +  bO₂   →    cN₂   +   dH₂O  

We need to balance the equation algebraically, ;

  Conserving N;

      a = 2c

   Conserving H;

      3a  = 2d

   Conserving O;

      2b  = d

Now, let c = 1, a = 2, d  = 3 and b  = \(\frac{3}{2}\)  

  multiply through by 2;

            a  = 4, b = 3, c  = 2 and d  = 6

Insert the parameters:

                  4NH₃  +  3O₂   →    2N₂   +   6H₂O

The molarity of the ethanol solution is 5.00 M.

To determine the molarity of the ethanol solution, we need to first calculate the number of moles of ethanol present in the solution, and then divide that by the volume of the solution in liters.

First, we need to determine the mass of ethanol present in the solution. To do this, we can use the density of ethanol:

Mass of ethanol = volume of ethanol x density of ethanol

                          = 35.0 ml x 0.790 g/ml

                          = 27.65 g

Next, we can use the molar mass of ethanol to calculate the number of moles of ethanol:

Number of moles of ethanol = mass of ethanol / molar mass of ethanol

                                               = 27.65 g / 46.07 g/mol

                                               = 0.600 moles

Finally, we can calculate the molarity of the solution:

Molarity = number of moles of solute/volume of solution (in liters)

             = 0.600 moles / 0.120 L

             = 5.00 M

Therefore, the molarity of the ethanol solution is 5.00 M.

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Answer:

animals

Explanation:

I think I remember this from a quiz I took so exotic species

The molality of the solution is 0.686 mol/kg.

Molality is a concentration unit that describes the number of moles of solute per kilogram of solvent. Molarity describes the number of moles of solute per liter of solution, while mass percent describes the mass of solute per 100 grams of solution.

Molality is preferred when changes in temperature or pressure can significantly affect the volume of the solution, since it is based on the mass of solvent rather than the volume.

Molality may be a preferred unit for certain types of chemical reactions or experiments because it is a measure of the number of moles of solute per kilogram of solvent, which is independent of temperature and pressure.

This makes it useful for reactions that require precise control of the concentration of the solute, such as in cryogenic reactions or in reactions that are highly sensitive to changes in temperature or pressure.

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An increase in pH will directly stimulate the peripheral chemoreceptors to increase ventilation.

Chemoreceptor can be stimulated by change in the chemical composition of their immediate environment .There are many types of chemoreceptor spread throughout the body which help to control different process including taste, smell and breathing. An increase in body temperature increases the rate from peripheral chemoreceptor neurons.

The chemoreceptor is also known as chemosensor. The chemoreceptor is a specialized sensory receptor which transduces a chemical substance ( endogenous or induced ) to generate a biological signal. The two types of chemoreceptor is peripheral and central.

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Option (d), P=ATC=MR=MC, accurately represents the long-run equilibrium condition for perfect competition, reflecting the balance between price and cost for firms operating in a competitive market.

The long-run equilibrium condition for perfect competition is that price (P) is equal to average total cost (ATC), which is also equal to marginal cost (MC), and marginal revenue (MR).

Option (d), P=ATC=MR=MC, best represents the long-run equilibrium condition for perfect competition. In perfect competition, firms operate at the minimum point of their average total cost curve, where price equals both average total cost and marginal cost. This condition ensures that firms are earning zero economic profit and are producing at an efficient level.

In the long run, if firms are earning economic profit, new firms will enter the market, increasing competition and driving prices down. Conversely, if firms are experiencing losses, some firms may exit the market, reducing competition and causing prices to rise. This process continues until firms reach a state where price equals average total cost, marginal cost, and marginal revenue, ensuring a long-run equilibrium.

Therefore, option (d), P=ATC=MR=MC, accurately represents the long-run equilibrium condition for perfect competition, reflecting the balance between price and cost for firms operating in a competitive market.

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Answer:

20 atoms

Explanation:

There are 4 in H2O2 because of 2 hydrogens and 2 oxygens.

Then, multiply by 5 because the coefficient is 5, therefore there are 5 H2O2 molecules.

5 x 4 = 20

The total number of atoms in the chemical formula 5H₂O₂ is 20.

The term chemical formula is defined as a way of presenting information about the chemical proportions of atoms that represent a particular chemical compound or molecule, applying chemical element symbols, numbers, and sometimes also other symbols, such as parentheses, dashes, brackets, commas.

There are three types of chemical formula that are structural, molecular and empirical chemical formula.

There are four atoms in H₂O₂ because of two atoms of hydrogen and two atoms of oxygen. Then, multiply by five because the coefficient is five, therefore there are 5 H₂O₂ molecules.We get,

= 5 x 4

= 20

Thus, The total number of atoms in the chemical formula 5H₂O₂ is 20.

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Answer:

Hi, There!

These Are All examples Of A physical property of a substance!

xXxAnimexXx

Have a great day!

Answer:a

Explanation:I think

\(C_6H_{12}O_6+O_2\) → \(H_2O+CO_2\) equation correctly describes the reaction. Hence, option A is correct.

Glucose is the main type of sugar in the blood and is the major source of energy for the body's cells.

Burning wood provides heat through the exothermic chemical reaction of oxygen (O) with cellulose (\(C_6H_{12}O_6\)), the major chemical component of wood, to produce carbon dioxide (\(CO_2\)), steam (\(H_2O\)) and heat.

The chemical reaction describing the process is

\(C_6H_{12}O_6+O_2\) → \(H_2O+CO_2\) +heat

Hence, option A is correct.

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