Why are trout found in cold streams (here in MI)?options:1) The solubility of oxygen gas decreases at a lower temperature2) The solubility of oxygen gas increases with colder temperature3) They like to watch skiers go whizzing by4) The solubility of oxygen increases with higher temperature

Answer:

pH = 1.33

Explanation:

Because HCl is a strong acid, each mole of HCl will completely dissociate into H⁺ and Cl⁻ species.

Now we calculate the molar concentration (molarity) of H⁺:

(750 mL ⇒ 750 / 1000 = 0.750 L)

Then we calculate the pH of the solution:

If 0.035 moles of HCl is dissolved in enough water to produce 750 ml of solution, then the pH will be 1.33

pH number tells how acidic or basic the liquid is.

HCl is a strong acid, its molecules will fully dissociate

H+ and Cl-

Now, calculate the molarity

\(Molarity = \dfrac{moles}{ volume} \\\\Molarity = \dfrac{0.035\; moles }{ 0.750 L} =0.0467 M\)

Calculate the pH of the solution

\(\rm pH = -log [H^+]\\ pH = -log (0.0467 M)\\ pH = 1.33\)

Thus, the pH of the solution is 1.33.

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Answer:  There are three main types of forests: tropical rainforests, deciduous forests, and coniferous forests. Tropical rainforests are found near the equator (the center of Earth), where they are warm all year round.

Explanation:

Ecosystems are defined as a geographical region where biotic factors like animals, plants and microorganisms live together and interact with the abiotic factors.

The three forest ecosystems are temperate, boreal and tropical.

Tropical forest ecosystems have high precipitation and temperature also a high humidity rate. The plant has a twelve-month growing period and the forests are found near the equator regions.

Temperate is found in between the boreal and the tropical forests, it has a high level of rainfall and humid conditions and is covered with the deciduous type of trees.

Boreal or the taiga forest ecosystems are located in the subarctic regions with low temperatures and have long winters. They are covered majorly by the scale-leaved evergreen and the needle leaves cones.

All three forest ecosystems have great species diversity, the tropical and the temperate forest have dense vegetation and the temperate and boreal have evergreen forests.

Therefore, three forest ecosystems are temperate, boreal and tropical.

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Answer:

Intramolecular forces are the forces that hold atoms together within a molecule. Intermolecular forces are forces that exist between molecules.

Explanation:

Answer:

They are symbols of elements.

Ra is the symbol of the element Radium

Ah is the symbol of the element Arrhenium

Ma  is the symbol of the element Molybdenum

Ga  is the symbol of the element Gallium

La  is the symbol of the element Lanthanum

Answer:

Ra is the symbol of the element Radium

Ah is the symbol of the element Arrhenium

Ma  is the symbol of the element Molybdenum

Ga  is the symbol of the element Gallium

La  is the symbol of the element Lanthanum

Explanation:

They are elements

The volume in liters of a 2.0 M solution of NaOH that can be made using 500.0 g NaOH is 6.25 liters.

The molarity of a solution is the concentration of a solution expressed in moles of solute per given liter of solution.

The molarity of a solution is given mathematically as follows:

The volume in liters of a 2.0 M solution of NaOH that can be made using 500.0 g NaOH is calculated below:

Moles of solute = mass/molar mass

Moles of NaOH = 500 / 39.997

Moles of NaOH = 12.5 moles

Volume of solution = 12.5 / 2.0

Vlume of solution = 6.25 liters

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There will be "no apparent reaction" when sodium hydroxide and sodium chloride react.

While NaCl is a salt, NaOH is a potent alkali. There is no chemical reaction between these two substances. Nothing. There isn't any response.

Thus, there will be "no apparent reaction" when sodium hydroxide and sodium chloride react.

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The complete question is-

Reaction of sodium hydroxide with sodium chloride will produce ______.

Answer:

"It is the average mass of all phosphorus elements in nature."

Explanation:

I don't really know why, I just got it right on this quiz with this answer. Hope it helps :)

The concentration of the chloride ion. I got 0.9 M is  mathematically given as

[CL^-]=0.9mm

The reactants are listed on the left side of a chemical equation, while the products are listed on the right. Both sides of a balanced chemical equation have the same number of atoms of each element and the same overall charge.

Generally, the chemical equation for the question  is  mathematically given as

b) If the solution is \($\mathrm{Fe}_{3}(a \omega)$\)

\(\begin{aligned}\mathrm{FCl}_{3} & \rightarrow \mathrm{a}^{+3}+3 \mathrm{Cl}^{-} \\& 1 \mathrm{Fe}^{+3} \mathrm{~S} 3 \mathrm{al} \text { ions incota. } \\\Rightarrow\left[\mathrm{El}^{-}\right] &=\frac{3}{4} \mathrm{Cl}^{-}+4 \mathrm{Cl}^{-} \\therefore\left[\mathrm{Cl}^{-}\right] &=1.2 \mathrm{~mm} \times \frac{3}{4} \\&=0.9 \mathrm{~mm}\end{aligned}\)

In conclusion, the concentration of the chloride ion. I got 0.9 M is

[CL^-]=0.9mm

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Answer:Cellular respiration is not the same as breathing, but they are closely related

Explanation: When you breathe in, you take in the oxygen your cells need for cellular respiration. When you breathe out, you get rid of carbon dioxide that your cells produce during cellular respiration.

Answer:

It is D !!

Explanation:

Just did test

Answer:

B. Moons

In almost every planet in the Milky Way galaxy, there is at least one moon in their orbit.

Based on the equation of the reaction, the unsimplified molar ratio used to convert H₂O into CO₂ is:

moles of CO₂ = moles of  H₂O * 4/6

The molar ratio of a reaction is the ratio in which the mole of the reactants combines to form products.

The molar ratio of a reaction can be expressed as the molar ratio of reactants and reactants, reactants and products, or products and products.

The molar ratio of a reaction is obtained from the balanced equation of the reaction.

Considering the given reaction;

equation of reaction: 2 C₂H₆ + 7 O₂ ----> 4 CO₂ + 6 H₂O

The molar ratio of the products carbon dioxide, CO₂ and water, H₂O is 4 : 6.

This means that in the given reaction of the combustion of ethane, for every 4 moles of carbon dioxide formed, 6 moles of water will be formed.

Hence the conversion factor to convert moles of  H₂O to moles of CO₂ is:

moles of CO₂ = moles of  H₂O * 4/6

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K>Mg>Si>C>N>He is the decreasing size of the atoms from largest to smallest.

The size of atoms is usually determined by their atomic radii, which is the distance from the nucleus to the outermost shell of electrons. The size of an atom increases as the number of protons and electrons increases.

The decreasing order of size in these elements is He, C, N, O, Mg, Si, and K. Helium is the smallest atom because it only has two protons and two electrons, while potassium is the largest atom because it has 19 protons and 19 electrons.

Carbon, nitrogen, oxygen, magnesium, and silicon all have between six and twelve protons and electrons, so they are of similar size.

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Answer:

There is no difference between the two.

Explanation:

They both show the same volume. But, adding decimal places shows the least count of the instrument used and is more acceptable when recording values in scientific experiments

According to the given equation, 2C4H10 + 1302 — 8CO2 + 10H, 2 moles of O are required to react with 4.71 moles of C4H10.

The number of moles of a compound can be calculated stoichiometrically as follows:

The balanced chemical equation is given as follows:

2C4H10 + 1302 — 8CO2 + 10H

Based on the above equation, 2 moles of C4H10 reacts with 13 moles of O

Therefore; 4.71 moles of C4H10 will react with 4.71 × 6.5 = 30.62 moles of O

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Answer: 30.6

Explanation:

The result of the Heat Transfer experiment is given as follows:  "The molecule was increased in kinetic energy but in a random structure." (Option B)

Heat transfer is a thermal engineering subject that deals with the creation, consumption, conversion, and exchange of thermal energy across physical systems.

Heat transmission is categorized into several methods, including thermal conduction, thermal convection, thermal radiation, and energy transfer via phase shifts.

At 3 p.m., the water temperature is raised. The average kinetic energy of an item is related to its temperature. As a result, as temperature rises, so does average kinetic energy.

Kinetic energy is created by the random movement of molecules. Hence, the correct answer is "The molecule was increased in kinetic energy but in a random structure."

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Full Question:

A student investigated heat transfer using a bottle of water. The student placed the bottle in a room at  20.50C. The student measured the temperature of the water in the bottle at 7 a.m. and again at 3 p.m.  The data from the investigation are shown in the table below.

[See attached image]

Question:How would you describe the average kinetic energy of the water molecules in the bottle at 7 a.m. to  the average kinetic energy of the water molecules in the bottle at 3 p.m.

Answer:

D

Explanation:

jfalsdkfj4iewoathdskgfjkla;

Answer:

B is the only one I think the others are just speculation

The actual disinfecting chemical which is included in some surface disinfectants is Phenol.

A chemical agent or compound known as a disinfectant is used to inactivate or eradicate bacteria on inert surfaces.

Alcohols and aldehydes are the chemical sterilant and high-level disinfectants. To eliminate the microorganisms that are found in drains, toilets, and floors, disinfectants like phenol are utilized.

In addition to alcohol, The EPA and the Centers for Disease Control have approved a class of effective surface sanitizers and disinfectants based on quaternary ammonium cations for use as hospital-grade disinfectants.

Aldehydes, like formaldehyde and glutaraldehyde, are sporicidal, and fungicidal, and have a broad range of microbicidal activity. They have a little amount of residual activity and are partially inactivated by organic materials.

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The work produced by the refrigerant during this process is 163.27 kJ, and the transfer of heat is -825.63 kJ. The negative sign indicates that heat is being removed from the refrigerant.

To calculate the transfer of heat and work produced during this process, we can use the first law of thermodynamics, which states that the change in internal energy of a closed system is equal to the heat added to the system minus the work done by the system. First, we need to determine the initial and final states of the refrigerant. The initial state is 600 kPa and 150°C, and the final state is -30°C and a volume of 0.1 m³. We can use the refrigerant tables to determine the specific volume and internal energy of the refrigerant at each state. From the tables, we find that the specific volume of the refrigerant at the initial state is 0.0551 m³/kg and the internal energy is 770.68 kJ/kg. At the final state, the specific volume is 0.001344 m³/kg and the internal energy is 108.32 kJ/kg. Using the first law of thermodynamics, we can calculate the transfer of heat and work produced during this process as follows:

ΔU = Q - W

where ΔU is the change in internal energy, Q is the transfer of heat, and W is the work produced by the refrigerant.

ΔU = U2 - U1 = 108.32 kJ/kg - 770.68 kJ/kg = -662.36 kJ/kg

Q = ΔU + W

W = -Q + ΔU = -mCp(T2 - T1) + ΔU

where m is the mass of the refrigerant, Cp is the specific heat capacity of the refrigerant, T1 is the initial temperature, and T2 is the final temperature.

Assuming a mass of 1 kg for the refrigerant, the specific heat capacity of R-134a at constant pressure (Cp) is 1.51 kJ/kgK. Plugging in the values, we get:

W = -mCp(T2 - T1) + ΔU

W = -1 kg x 1.51 kJ/kgK x (-30°C - 150°C) + (-662.36 kJ/kg)

W = 163.27 kJ

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The statement that is true regarding percentage error is as follows: the percentage error is a percentage that details how far an approximation is from the exact value after an experiment (option B).

Percentage error is the difference between estimated value and the actual value in comparison to the actual value and is expressed as a percentage.

The percentage error in an experiment can be calculated by subtracting the actual value from the estimated value divided by the actual value, then multiplying the result by 100.

Percentage error = (Estimated value - Actual value/ Actual value) × 10

Therefore, the statement that is true regarding percentage error is as follows: the percentage error is a percentage that details how far an approximation is from the exact value after an experiment.

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Answer:5.5

Explanation:

Answer:  1.53 M

Explanation:

1) solve for moles

345 g CaCO3 x ( 1mol/100.09 g) =3.446897792 moles

2) plug in formula M=mole/liters

3.446897792 / 2.25 = 1.53 M

The reason why a separate dropper is used for each stock solution in reagent bottle is so as to prevent contamination of the reagents.

This is referred to as a short glass or plastic tube fitted with a rubber bulb which are found in reagents and is used to measure liquids by drops in the laboratory.

It is best for a separate dropper to be used for each stock solution in reagent bottle so as to prevent contamination of the reagents. This helps to ensure that the experiments which are performed are very accurate which is therefore the reason why it was chosen as the correct choice.

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\(\\ \sf\longmapsto 4x+6=-10\)

\(\\ \sf\longmapsto 4x=-10-6\)

\(\\ \sf\longmapsto 4x=-16\)

\(\\ \sf\longmapsto x=\dfrac{-16}{4}\)

\(\\ \sf\longmapsto x=-4\)

4x + 6 = - 10

4x = -10-6

4x = -16

x = -16/4

× = -4

ANSWER

EXPLANATION

Given that

The two compounds reacting are sodium sulfide and hydrochloric acid

Molecular formula is defined as a chemical formula that gives the total number of atoms of each element in each molecule of a substance.

To write the molecular formula of the two compounds, apply the law of conservation of mass

Law of conservation of mass states that matter can neither be created nor destroyed but can be transformed from one form to another.

This implies that, the total number of atoms in the reactant sides is equal to the total number of atoms on the product side.

Hence, we have

Therefore, option A is the correct answer

At 25 degrees Celsius, with 50g of sugar, the solution will appear clear and homogeneous, with all the sugar dissolved. The ratio of dissolved sugar to undissolved sugar will be 50:0, as all the sugar has dissolved.

If an additional 55g of sugar is added to the 25-degree water, the solution will become supersaturated. This means that the water cannot dissolve all the sugar, resulting in the excess sugar remaining undissolved as solid particles at the bottom of the container. The solution will appear cloudy, and the ratio of dissolved sugar to undissolved sugar will be 50:5, as only 50g of the added sugar can dissolve.

When the solution is heated, the solubility of sugar increases. As a result, more sugar will dissolve, and the solution will become clear again. The ratio of dissolved sugar to undissolved sugar will approach 105:0 as the temperature increases and more sugar dissolves.

If the heated solution is slowly cooled back to 25 degrees Celsius, the solubility of sugar decreases. This will cause the excess sugar to come out of the solution and form solid crystals, which will be visible as sugar particles. The solution will appear cloudy again, and the ratio of dissolved sugar to undissolved sugar will depend on the amount of sugar that remains dissolved after cooling.

Adding a seed crystal to the mixture provides a surface for sugar crystals to form, resulting in the rapid crystallization of the remaining dissolved sugar. The solution will become saturated with sugar crystals, and the ratio of dissolved sugar to undissolved sugar will be close to 0:55, as most of the sugar will have crystallized. The solution will appear cloudy with a significant amount of sugar crystals present.

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Answer:

True

Explanation:

A typhoon forms when wind blows into areas of the ocean when the water is warm. These winds collect moisture and rise, while colder air moves in below. This creates pressure, which causes the winds to move very quickly. The wind rotates, or spin, around a center called an eye.

Answer:

answering so the person who wanted brainliest can get it :D

<3

In the following experiment, a coffee-cup calorimeter containing 100 mL of \(H_{ 2} O\) is used. The initial temperature of the calorimeter is 23.0 ∘C. If 6.60 g of \(CaCl_{2}\) is added to the calorimeter, Final temperature of the solution in the calorimeter = 11.

The first step in solving this problem is to calculate the number of moles of \(CaCl_{2}\\\) added to the calorimeter.

Moles of \(CaCl_{2}\) = mass of \(CaCl_{2}\) / molar mass of \(CaCl_{2}\)

Moles of\(CaCl_{2}\) = 6.60 g / 110.98 g/mol (molar mass of \(CaCl_{2}\)

Moles of\(CaCl_{2}\) = 0.0594 mol

We can use the equation for heat transfer to find the change in temperature of the solution. q = mCsΔT, where q is the heat transferred, m is the mass of the solution, Cs is the specific heat of the solution, and ΔT is the change in temperature.

We know that the initial temperature of the calorimeter is 23.0 ∘C and the mass of the solution is 100 g (since the density of water is 1 g/mL). We can solve for ΔT: ΔT = q / mCs

To find q, we can use the enthalpy change of solution (ΔHsoln) and the number of moles of\(CaCl_{2}\)added: q = ΔHsoln x moles of\(CaCl_{2}\)

q = -82.8 kJ/mol x 0.0594 mol

q = -4.92 kJ

Now we can solve for ΔT: ΔT = (-4.92 kJ) / (100 g x 4.184 J/g⋅∘C)

ΔT = -11.8 ∘C

We can find the final temperature of the solution by adding the change in temperature to the initial temperature: Final temperature = 23.0 ∘C - 11.8 ∘C =11 ∘C.

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