what is the partial pressure of nitrogen in air at atmospheric pressure (1 atm )? assume ideal behavior.

The answer to the question is Ammonia.

Answer:

OX-Y-Z

Explanation:

its the correct answer

The correct order from the most amount of motion( Kinetic energy) to the least amount of motion is Y (gas), Z (liquid), and X (ice). The correct answer is C, Y-Z-X.

In the given sequence, the states of matter with the most amount of motion (kinetic energy) to the least amount of motion are as follows:

Y - Gas (highest kinetic energy, molecules move freely and quickly in all directions)

Z - Liquid (intermediate kinetic energy, molecules have some freedom of movement but are more closely packed than in a gas)

X - Ice (lowest kinetic energy, molecules are tightly packed and have minimal movement, as it is in a solid state)

This sequence reflects the increasing freedom of movement and mobility of molecules as they transition from a solid to a liquid to a gas state.

Thus, the correct option is C.

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The reaction of ∆G° is -14,736 J. A negative ∆G° indicates that the reaction can proceed spontaneously without the input of external energy.

To calculate ∆G° (standard Gibbs free energy change) for a reaction, we can use the equation:

∆G° = ∆H° - T∆S°

Given:

∆H° = 24.6 kJ

∆S° = 132 J/K

T = 298 K

First, we need to convert the units of ∆H° to match the units of ∆S° (kJ to J):

∆H° = 24.6 kJ = 24,600 J

Now, we can substitute the values into the equation to calculate ∆G°:

∆G° = 24,600 J - (298 K) * (132 J/K)

∆G° = 24,600 J - 39,336 J

∆G° = -14,736 J

Since ∆G° is negative (-14,736 J), the reaction is spontaneous under these conditions. A negative ∆G° indicates that the reaction can proceed spontaneously.

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The purpose of a control in a scientific investigation is to: - Serve as a baseline or reference point for comparison with the experimental group, ensure that any observed effects are actually due to the experimental manipulation and not to other factors and increase the validity and reliability of the results by reducing the likelihood of confounding variables.

The purpose of a control in a scientific investigation is to:
1. Provide a baseline for comparison: Controls allow you to compare the results of the experimental group to a group that has not experienced any changes, helping you to determine if the independent variable is responsible for the observed effects.
2. Minimise the impact of confounding variables: By having a control group, you can better account for variables that may influence the results, ensuring that the observed effects are due to the independent variable rather than other factors.
3. Increase the reliability and validity of the study: Controls help to strengthen the study's design, making the findings more reliable and valid.
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Answer:

D as in :D lol

Answer:

350.7 g of NaCl

Explanation:

For this reactions our reactants are:

HCl and Na₂CO₃.

Then, the reaction is:

2HCl + Na₂CO₃ →  2NaCl  +  H₂CO₃

2 moles of hydrochloric acid react to 1 mol of sodium carbonate in order to produce 2 moles of salt and 1 mol of carbonic acid.

Ratio is 1:2. 1 mol of sodium carbonate can produce 2 moles of NaCl

Then, 3 moles of carbonate may produce (3 . 2) /1 = 6

We convert the moles to mass to determine the theoretical yield

6 mol . 58.45g /mol = 350.7 g

The theoretical yield of NaCl produced is 350.7 g.

NaCl is a salt, and it is an ionic compound.

The reaction is

\(\rm 2HCl + Na_2CO_3 \rightarrow 2NaCl + H_2CO_3\)

2 mol of HCl reacts with 1 mol of \(Na_2CO_3\) and produces 2 mol of NaCl and 1 mol of \(H_2CO_3\).

The ratio will be \(Na_2CO_3\) : NaCl

                                1 : 2

Then, for 3 mol of \(Na_2CO_3\)

\(\dfrac{3 \times 2}{1} = 6\)

Now, convert the moles to mass

\(6\; mol \times 58.45g /mol = 350.7 g\)

Thus, the theoretical yield produced is 350.7 g.

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Answer:

atomic mass is the mass of an atom compared to that of carbon 12 isotope while molecular mass is the mass of a given molecule

Explanation:

Answer:

dont know

Explanation:

A system's equilibrium will move to the right, or toward the side of the products, in accordance with Le Chatelier's principle, if more reactants are added. ... The equilibrium will move to the left if we add more product to a system, producing more reactants.

Solution: By increasing the number of reactants, the equilibrium moves to the right and in the direction of the products.

Thus, if a reactant is added, equilibrium shifts to the right, away from the reactant. Equilibrium shifts to the left, away from the product, when a product is added. If we take away the product, equilibrium returns and produces the product. Reactant is created if reactant is removed, breaking the equilibrium.

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Answer:

I hope this is right :)

empirical formula ---› molecular formula

Answer:

1

Explanation:

Any digit that is not 0 is always significant

Answer:

False

Explanation:

The relationship between energy and amplitude can be written as eαa^2

This means that the energy of a wave is directly proportional to the square of the amplitude.

Answer:

B

Explanation:

I'm very sure it decreases

While a sample of liquid is freezing, its thermal energy decreases. Therefore, the correct option is option B.

Thermal energy is the internal energy that an object or system has as a result of the movement of its constituent particles. It is a type of kinetic energy that is related to a substance's temperature. A substance's overall thermal energy is impacted by the constantly moving particles that make up the substance. Conduction, convection, and radiation are the three basic ways that thermal energy can move from one thing to another. Heat transfers from the warmer to the cooler object by conduction when two things are in close proximity.

Therefore, the correct option is option B.

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Answer:

wrong.

Explanation: charged atoms have have more electrons than neural because  they charge it . a  neural atom has eaqual number of electrons and neutrons.

hope this helps(^人^)

The pH of the buffer solution is 5.401 when a solution containing an acid of pka6.1, with an acid concentration exactly five times that of the conjugate base.

To determine the pH of a buffer solution, we use the Henderson-Hasselbalch equation:
pH = pKa + log([A-]/[HA])
Where pKa is the dissociation constant of the weak acid, [A-] is the concentration of the conjugate base, and [HA] is the concentration of the weak acid.
In this case, the acid has a pKa of 6.1, which means that at pH 6.1, half of the acid will be in the ionized form (A-) and half will be in the non-ionized form (HA).
Since the acid concentration is five times that of the conjugate base, we can assume that [HA] = 5[A-].
Now we can plug in the values:
pH = 6.1 + log([A-]/[5A-])
pH = 6.1 + log(1/5)
pH = 6.1 - 0.699
pH = 5.401

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Answer:

I think it is synthesis

Answer:

The answer is Synthesis

Explanation:

The two objects combine to make a bigger object

Answer:

if the colliding objects have unequal mass, they will have unequal accelerations as a result of the contact force that results during the collision.

Answer:

those small sediments begin to precipitate, condense on the ground and finally settle.

Explanation:

Sedimentation is a natural process, which occurs spontaneously in nature and promotes the formation of sedimentary rocks.

pproximately 3.00 × 10^23 particles of HCl reacted.

HCl Particles Reacted: 3.00x10^

2HCl + K2CO3 → 2KCl + H2O + CO2

If 6.0 × 10^23 particles of H2O are produced, how many particles of HCl were reacted?

The balanced chemical equation for the reaction between HCl and K2CO3 is:

2HCl + K2CO3 → 2KCl + H2O + CO2

From the equation, we can see that 2 moles of HCl react to produce 1 mole of H2O. Therefore, the number of moles of HCl that reacted can be calculated as:

moles of HCl = moles of H2O / 2

We are given that 6.0 × 10^23 particles of H2O are produced. To convert this to moles, we need to divide by Avogadro's number:

moles of H2O = 6.0 × 10^23 / 6.022 × 10^23 = 0.997 moles (approx.)

Using the balanced equation, we can see that 1 mole of H2O is produced from 2 moles of HCl. Therefore, the number of moles of HCl that reacted is:

moles of HCl = 0.997 moles H2O / 2 = 0.4985 moles HCl (approx.)

Finally, we can convert moles of HCl to particles of HCl by multiplying by Avogadro's number:

particles of HCl = moles of HCl x Avogadro's number

particles of HCl = 0.4985 x 6.022 × 10^23

particles of HCl = 3.00 × 10^23 particles (approx.)

Therefore, approximately 3.00 × 10^23 particles of HCl reacted.

Answer:(c)

Explanation:

We are given that 15.0 mL of oil is dissolved in enough gasoline to give a total volume of 50.0 mL.

To calculate the percent volume/volume (% v/v) of oil in the solution, we need to determine the ratio of the volume of oil to the total volume of the solution.

To calculate the percent volume/volume, we divide the volume of oil by the total volume of the solution and multiply by 100 to express it as a percentage.

% v/v = (Volume of oil / Total volume of solution) * 100

Plugging in the values:

% v/v = (15.0 mL / 50.0 mL) * 100

Calculating this expression:

% v/v = 0.3 * 100

% v/v = 30.0%

Therefore, the % v/v of oil in the solution is 30.0%. This means that 30.0% of the total volume of the solution is occupied by the oil component.

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Iodine is an essential element that the human body needs for proper thyroid function and the production of thyroid hormones. Thyroid hormones play a vital role in many important bodily functions, including metabolism, growth, and development. However, in areas where soil and water are deficient in iodine, people may not consume enough iodine in their diet, leading to iodine deficiency.

To address this issue, the United States government began adding iodine to table salt in the 1920s, a practice that continues to this day. This is known as iodized salt. Iodized salt is a simple and cost-effective way to ensure that the population gets enough iodine in their diet to prevent iodine deficiency, which can cause a range of health problems, including goiter (enlarged thyroid gland), hypothyroidism, and intellectual disabilities in children.

Iodine deficiency is still a significant problem in many parts of the world, particularly in developing countries. The addition of iodine to salt has been one of the most successful public health interventions in history, helping to prevent iodine deficiency and its associated health problems.

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The mass of Fe2S3 formed would be 12.0 g

The limiting reactant is iron (Fe)

The percent yield of iron (III) sulfide would be 108.4%

Fe + S -> FeS

From the equation, we see that one mole of Fe reacts with one mole of S to produce one mole of FeS. To determine the mass of FeS that can be formed, we need to determine which reactant is limiting and which is in excess.

Number of moles of Fe = mass / molar mass = 7.62 g / 55.845 g/mol = 0.136 moles

Number of moles of S = mass / molar mass = 8.67 g / 32.06 g/mol = 0.27 moles

We see that Fe is limiting because there are fewer moles of Fe than S. The stoichiometry of the reaction tells us that one mole of Fe produces one mole of FeS.

The mass of FeS that can be formed is:

mass = number of moles × molar mass

mass = 0.136 moles × 87.91 g/mol (molar mass of FeS)

mass = 12.0 g

percent yield = actual yield / theoretical yield × 100%

percent yield = 13.01 g / 12.0 g × 100%

percent yield = 108.4%

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Answer:

The correct answer is D. B = +3; H = -1.

To draw the Lewis dot structure of the BH4 ion, we first determine the total number of valence electrons:

B: 3 valence electrons

H: 1 valence electron x 4 = 4 valence electrons

Total: 3 + 4 = 7 valence electrons

The single B atom is the central atom, and the four H atoms are attached to it. Each H atom forms a single bond with the B atom, which uses up 4 valence electrons:

H H

| |

H-B-H

|

H

We have 3 valence electrons left, which we place around the central B atom as lone pairs:

H H

| |

H-B-H

| |

H--

Each H atom has a full valence shell (2 electrons), and the B atom has an octet (8 electrons). However, the B atom now has 5 valence electrons, which gives it a formal charge of +3. Each H atom now has only 1 valence electron, which gives it a formal charge of -1. The sum of the formal charges in the BH4 ion is 0, as it should be for a neutral molecule/ion.

8.6 mole sample of NO₂ in a 5. 1 L container has 4.6 atmospheric pressure at 33 K.

Given, number of moles of No₂(n) = 8.6 mole

Volume (V) = 5.1 liters

Temperature (T) = 33K

R= 0. 08206 L•atm / (mol•K)

Using ideal gas equation ,

PV=nRT

P (5.1L) = (8.6mol) (0.08206L•atm/(mol•K)) (33K)

P (5.1) = 8.6 × 0.08206 × 33

P (5.1) = 23.3

P = 23.3 ÷ 5.1

P = 4.6 atm

Hence, the pressure of the given gas is 4.6 atmosphere (atm).

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Answer:

The main way animal-like protists differ from plant-like protists is in the way they get energy. Animal-like protists are heterotrophs. They have to eat other protists or bacteria in order to get energy, much as animals have to eat plants or other animals to get their energy. Plant-like protists, on the other hand, are autotrophs. They can make their own energy from the sun or other sources just as plants can.

Explanation:

hope that helps ☺️

Explanation:

Animal-like protists are heterotrophs. Plant-like protists, on the other hand, are autotrophs.

Answer:

Option 2: 6KCl + Ca₃(PO₄)₂

Explanation:

K₃PO₄ + CaCl₂ → Ca₃(PO₄)₂ + KCl

Balancing the equation,

2K₃PO₄ + 3CaCl₂ → Ca₃(PO₄)₂ + 6KCl

∴ the correct formula and coefficients of the products in the equation are,

6KCl + Ca₃(PO₄)₂

ClO\(_2\), H\(_2\)O are the polar covalent compounds, since all of these chemicals have a dipole moment.

Polar covalent compounds are electrical conductors. Polar compounds comprise chemical compounds held together through polar covalent bonds.

A polar compound is a chemical species that has two or even more atoms that are linked together by polar covalent bonds that share electrons irregularly. ClO\(_2\), H\(_2\)O are the polar covalent compounds, since all of these chemicals have a dipole moment.

Therefore,  ClO\(_2\), H\(_2\)O are the polar covalent compounds.

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The enthalpy for Reaction 1 reversed is -109 kJ/mol, which means that the reversed reaction releases 109 kJ/mol of heat energy.

Enthalpy is a thermodynamic property of a substance that represents the amount of heat energy absorbed or released during a chemical reaction. The enthalpy change for a chemical reaction can be determined by measuring the heat energy absorbed or released during the reaction. In this case, the given chemical reaction is Reaction 1 with an enthalpy change of +109 kJ/mol. This means that the reaction absorbs 109 kJ/mol of heat energy.
To find the enthalpy for Reaction 1 reversed, we need to reverse the direction of the reaction. When a reaction is reversed, the sign of its enthalpy change is also reversed. Therefore, the enthalpy for Reaction 1 reversed is -109 kJ/mol. This means that the reversed reaction releases 109 kJ/mol of heat energy.
The enthalpy change for a chemical reaction depends on the difference in energy between the reactants and products. If the products have less energy than the reactants, the reaction is exothermic and releases heat energy, resulting in a negative enthalpy change. Conversely, if the products have more energy than the reactants, the reaction is endothermic and absorbs heat energy, resulting in a positive enthalpy change.
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