During thunderstorms, lightning causes the following chemical change. Which statement BEST describes the role of lightning in the nitrogen cycle?
answer choices
A. the rate of nitrogen precipitation is decreased
B. organic matter is burned and decomposed
C. the process of nitrification is interrupted
D. nitrogen is fixed in the atmosphere

Taking into account the definition of Avogadro's Number, 10.365 moles of H₂O are 6.243×10²⁴ molecules of H₂O.

Avogadro's Numberis called the number of particles that make up a substance (usually atoms or molecules) and that can be found in the amount of one mole of said substance.

Its value is 6.023×10²³ particles per mole and it applies to any substance.

You can apply the following rule of three: if 6.023×10²³ molecules are contained in 1 mole of H₂O, then 6.243×10²⁴ molecules are contained in how many moles of H₂O?

amount of moles of H₂O= (6.243×10²⁴ molecules× 1 mole)÷ 6.023×10²³ molecules

amount of moles of H₂O= 10.365 moles

Finally, 10.365 moles of H₂O are 6.243×10²⁴ molecules of H₂O.

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Answer:

Mg+HCl = MgCl+H2

Explanation:

you just have to write the correct formula of these elemernt

In the periodic table, elements in green are called transition metals and are all metallic in nature.

Periodic table is a tabular arrangement of elements in the form of a table. In the periodic table, elements are arranged according to the modern periodic law which states that the properties of elements are a periodic function of their atomic numbers.

It is called as periodic because properties repeat after regular intervals of atomic numbers . It is a tabular arrangement consisting of seven horizontal rows called periods and eighteen vertical columns called groups.

Elements present in the same group have same number of valence electrons and hence have similar properties while elements present in the same period show gradual variation in properties due to addition of one electron for each successive element in a period.

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Answer:

wavelength = 6 cm .

Explanation:

frequency given = 5 x 10⁹ .

wavelength = velocity of light / frequency

= 3 x 10⁸ / 5 x 10⁹

= .06 m

= 6 cm

Answer:

If Earth was tilted much less on its axis, it would lead to minor changes in precipitation and temperatures as Earth moves slightly towards and away from the sun.

Explanation:

If a planet tilts more, it leads to colder winters and warmer summers. However, if a planet tilts less, it leads to less severe seasons that is and milder winters and cooler summers.

If Earth was tilted much less on its axis, it would lead to minor changes in precipitation and temperatures as Earth moves slightly towards and away from the sun.

Water pollution is described as the presence of toxins in water sources that make it unsafe for use in drinking, cooking, cleaning, swimming, and other activities.

Pollutants include things like chemicals, trash, bacteria, and parasites. All pollution eventually finds its way into the water.

The Clean Water Act is what?

The Clean Water Act (CWA) establishes the fundamental framework for policing pollutant discharges into US waters as well as standards for the cleanliness of surface waters.

The CWA is thought to have its roots in the Federal Water Pollution Control Act, which was approved in 1948 but underwent considerable revisions and expansion in 1972. The Act's common name was modified to "Clean Water Act" with revisions in 1972.

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Answer:

A. two or more atoms held together with bonds make up a molecule. 

Explanation:

mark brainiest pls <3

Answer:

Hydrogen

Explanation:

This may be wrong but I can't really tell because of how you have written the question

Answer: The answer is D. Hydrogen

Explanation:

I took the test

Electron configuration is the arrangement and distribution of electrons of an atom in an atomic orbital or of a molecule in a  molecular orbital.

In option a)

In the periodic group of  main group component to valence electronic structure (IIIA group) and Aluminum (Al). The monatomic ion forms a load of (+3)

In option b)

The Chlorine within the periodic group (VIIA group) is the main group element for valence electron configuration  (Cl). It constitutes a monatomic ion with a load of (-1).

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Answer:

*Snif*Snif*UnU so powerful

Explanation:

Answer:

Viruses

Explanation:

Like duh, they can have babies but like they rely on cells, which makes it that they aren't living. Since they are just like they need support and like cells don't like supporting viruses. Kind of like talking to a Chad so like just back off man.

Answer:

The equation for the reaction between Al and Br2 is:

2Al + 3Br2 -> 2AlBr3

If there is an excess of Al and 6.0 mol of Br2, then the limiting reactant will be Br2, and the number of moles of AlBr3 formed will be equal to the number of moles of Br2 consumed, which is 6.0 mol.

Therefore, assuming 100% yield, 6.0 mol of AlBr3 will be formed.

Answer: Argon (Ar)

Explanation:

Of the noble gases, Argon (Ar) is present in highest concentration in dry air at sea level.

Answer:

it is becuse the students used wrong apparatus

The biggest error in this investigation is the use of inappropriate types of equipment.

The types of equipment used in the given setup are inappropriate. Suggested improvements in the apparatus to increase the accuracy are given below:

1. The use of a polystyrene cup in the laboratory for any reaction is inappropriate. As a slight increase in temperature causes the decomposition of the chemicals in the cup as well.

2. The use of a thermometer stand is a must. Without using the stand, the tip of the thermometer touches the lid of the container, which causes inaccuracies in the result.

Hence, all the suggestions are listed above.

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Answer

[H⁺] = 1.778 x 10⁻³ M

[OH⁻] = 5.624 x 10⁻¹² M

Explanation

Given:

The pH of the lemon juice = 2.75

What to find:

The [H⁺] and [OH⁻] of the lemon juice.

Step-by-step solution:

pH is a measure of hydrogen ion concentration, a measure of the acidity or alkalinity of a solution. The pH scale usually ranges from 0 to 14.

The equation for calculating pH is

Putting the values of pH as 2.75 into the equation above, the [H⁺] of the juice can be calculated as follows:

The [H⁺] = 1.778 x 10⁻³ M

The [H⁺] and [OH⁻] of an aqeuous solution is related by

So, putting [H⁺] = 1.778 x 10⁻³ M into the relation, we have [OH⁻] of the lemon juice to be:

Therefore, [H⁺] = 1.778 x 10⁻³ M and [OH⁻] = 5.624 x 10⁻¹² M

Answer:

55.3 = 328.45k

255 = 18.15°c

447 = 173.85°c

-14 = 14k

Answer:

it is round and round that is it

Answer:

Explanation:

0.180 moles of Ba(OH)2 are present.

Answer:

\(\boxed {\boxed {\sf 0.123 \ mol \ Ba(OH)_2}}\)

Explanation:

Molarity is a measure of concentration in moles per liter. It is calculated using the following formula:

\(molarity= \frac{moles \ of \ solute}{liters \ of \ solution}\)

The molarity of the solution is 0.600 M Ba(OH)₂. 1 molar (M) is also equal to 1 mole per liter, so the molarity is 0.600 moles of Ba(OH)₂ per liter.

The volume of the solution is 205 milliliters, however, we need to convert the volume to liters. Remember that 1 liter contains 1000 milliliters.

Now we know the molarity and volume, but the moles are still unknown.

Substitute these values into the formula.

\(0.600 \ mol \ Ba(OH)_2 /L = \frac{x}{0.205 \ L}\)

We are solving for x or the moles of solute, so we must isolate the variable. It is being divided by 0.205 liters. The inverse of division is multiplication. Multiply both sides by 0.205 L.

\(0.205 \ L *0.600 \ mol \ Ba(OH)_2 /L = \frac{x}{0.205 \ L} * 0.205 \ L\)

\(0.205 \ L *0.600 \ mol \ Ba(OH)_2 /L =x\)

The units of liters cancel.

\(0.205 *0.600 \ mol \ Ba(OH)_2 =x\)

\(0.123 \ mol \ Ba (OH)_2 = x\)

The original measurements had at least 3 significant figures. Our answer currently has 3 sig figs, so we don't need to round.

There are 0.123 moles of barium hydroxide.

If the temperature remains constant, the new volume of the gas will be 1.973 m³

Initial volume of oxygen (V1) = 0.478 m³

Final volume of oxygen (V2) = ?

Absolute pressure (P1) = 4.13 atm

Final Pressure (P2) = 1.00 atm

Temperature = constant

To find out the final volume (V2) we will use the final equation

    V2 / V1 = P1 / P2

Rearrange it for V2

    V2 = V1 × (P1 / P2)

Put the values in the above equation

    V2 = 0.478 m³ (4.13 atm / 1.00 atm)

    V2 = 0.478 m³ × 4.13

    V2 = 1.974 m³

So the final volume of the gas will be 1.973 m³.

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Approximately 4 L of C₂H₂ are required to produce 8 L of CO₂ assuming the reaction is at STP.

To solve for the amount of C₂H₂ needed, we can use the stoichiometry of the balanced equation, combustion of hydrocarbons and the ideal gas law. According to the balanced equation, 2 moles of C₂H₂ react to produce 4 moles of CO₂. Therefore, we can set up the following ratio by assumimg x moles of C₂H₂ and then solving for x,

x = (2/4) * (8 L CO₂)

= 4 L C₂H₂

Since the problem states that the reaction is at STP (standard temperature and pressure), we can assume that the volume of gas is directly proportional to the number of moles of gas.

V = nRT/P

Solving for n at STP,

n = PV/RT = (4 L) x (1 atm) / (0.0821 L·atm/mol·K x 273.15 K) ≈ 0.167 mol

Therefore, approximately 0.167 mol (or 4 L) of C₂H₂ is required to produce 8 L of CO₂ assuming the reaction is at STP.

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Answer:

I had to increase the strength. As I increase the strength, the pH of the solution gets lower because there are not many particles of HA. Therefore if I decrease the amount of strength, the pH will increase along with the HA particles and the number of red and blue particles will decrease.

Explanation:

I scored 4/4 on this good luck

The distance between the two electrons is approximately 5.30 x 10^-11 meters.

To calculate the distance between two electrons given the repulsive force between them, we can use Coulomb's Law, which states that the force between two charges is directly proportional to the product of their charges and inversely proportional to the square of the distance between them.

In this case, we know that the repulsive force between two electrons is 4.00 n (newtons), and we can assume that the charges of the electrons are equal (since they are both electrons). The charge of an electron is approximately -1.602 x 10^-19 coulombs.

Using Coulomb's Law, we can solve for the distance between the electrons:

F = k * q^2 / d^2

where F is the force between the charges, k is Coulomb's constant (approximately 9 x 10^9 Nm^2/C^2), q is the charge of each electron (-1.602 x 10^-19 C), and d is the distance between the electrons (what we want to solve for).

Plugging in the given values, we get:

4.00 n = (9 x 10^9 Nm^2/C^2) * (-1.602 x 10^-19 C)^2 / d^2

Solving for d, we get:

d = sqrt[(9 x 10^9 Nm^2/C^2) * (-1.602 x 10^-19 C)^2 / (4.00 n)]

d = 5.30 x 10^-11 meters (or 0.053 nanometers)

Therefore, the distance between the two electrons is approximately 5.30 x 10^-11 meters (or 0.053 nanometers).

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2.77 moles of water vapour (H2O) are created when 154.42 g of oxygen gas (O2) reacts with an excess of ethane (C2H6).

Calculation-

In order to create water vapour \((H_2O)\), ethane \((C_2H_6)\)and oxygen gas (O2) must be burned. The chemical equation for this reaction is:

\(C_2H_6 + 7O_2 -- > 4H_2O + 6CO_2\)

We may deduce from the equation that when 1 mole of ethane (C2H6) interacts with 7 moles of oxygen gas (O2), 4 moles of water vapour (H2O) are created.

We must utilise its molar mass to translate the 154.42 g of oxygen gas (O2) consumed into moles. 32 g/mol (16 g/mol for each oxygen atom multiplied by two for O2) is the molar mass of oxygen gas.

Moles of oxygen gas (O2) = Mass of oxygen gas (O2) / Molar mass of oxygen gas (O2)

Moles of oxygen gas (O2) = 154.42 g / 32 g/mol

Moles of oxygen gas (O2) = 4.83 mol (rounded to two decimal places)

The balanced equation's stoichiometry predicts that 7 moles of oxygen gas \((O_2)\)and 4 moles of water vapour \((H_2O)\) will react. We can thus calculate the moles of water vapour \((H_2O)\) created using the stoichiometric principle.

Moles of water vapor \((H_2O)\) = Moles of oxygen gas \((O_2)\) × (4 moles of \(H_2O\) / 7 moles of O2)

Moles of water vapor \((H_2O)\) = 4.83 mol × (4/7)

Moles of water vapour\((H_2O)\) = 2.77 mol (rounded to two decimal places)

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Answer:

ty

Explanation:

Therefore the pressure if the volume is increased to 4.12L the pressure is

P₂=0.636atm

Helium is a chemical element with the atomic number 2 and the letter He. It is a colourless, odourless, tasteless, non-toxic, inert, monatomic gas and the first member of the noble gas group in the periodic chartIt has the lowest melting and boiling points of all the elements.

Since helium is a safe, non-flammable gas, it is frequently used to inflate balloons for festivities and parades. On the other hand, helium is a crucial component in several sectors, including high-tech manufacturing, medical technology, space exploration, and national security.

The second most prevalent element in the universe, helium, is scarce on Earth. It is the lightest noble gas, colourless, odourless, inert, and has a low boiling point. It is a byproduct of nuclear fusion and radioactive decay.

According to Boyle's Law:

P₁ V₁=P₂ V₂

P₁=1.61atm

V₁=2.26L

V₂=4.12L

P₂=(P₁ V₁)/V₂

P₂=((1.61atm)(2.26L))/4.12L

P₂=0.636atm

Boyle's Law states that the volume of a given quantity of gas at a constant temperature is inversely proportional to its pressure, so this makes sense. The pressure must decrease proportionally as the volume rises.

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The solubility of the gas at a pressure of 85 kPa is 0.456 g/L.

The relationship between pressure and a gas's solubility is straightforward. That is, it gets bigger as the strain gets bigger.

The combined gas law can be used to resolve this issue and says that:

(P1V1)/T1 = (P2V2)/T2

To solve for V2, which stands for the new volume at the reduced pressure, we can rearrange this equation as follows:

V2 = (P1V1T2)/(P2T1)

Since the temperature is held constant, T1 = T2, and this simplifies to:

V2 = (P1V1)/P2

Solubility2 = (Solubility1 x P2) / P1

where the solubility at greater pressure is denoted by Solubility1.

With numbers from the problem substituted, we obtain:

Solubility2 = (0.584 g/L x 85 kPa) / 109 kPa

Simplifying this expression, we get:

Solubility2 = 0.456 g/L.

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Answer:

igneous rock

Explanation: