According to the balanced reaction
below, calculate the quantity of
moles of NO2 gas that forms when
5.20 x 10^-3 mol of N2O5 gas completely reacts: 2 N₂O5(g) → 4NO₂(g) + O₂(g)

Answer:

\(V_{H_2O}=460 mL\)

Explanation:

Hello!

In this case, in a dilution process, water is added to a solute in order to decrease its concentration but increase the volume of the solution. It means that if we have 20.0 mL of a 12.0-M solution of HCl and we want a 0.500-M solution, we need to apply the following formula considering that the moles remain unchanged:

\(M_1V_1=M_2V_2\)

Thus, solving for the final volume is:

\(V_2=\frac{M_1V_1}{M_2}\)

So plugging in the values we obtain:

\(V_2=\frac{12.0M*20.0mL}{0.500M}\\\\V_2=480 mL\)

Now, since the initial volume of acid was 20.0 mL and the final volume is 480 mL, the added volume of distilled water is:

\(V_{H_2O}=480-20=460 mL\)

Best regards!

Answer: arrangement of constituent particles makes glass diff. from quartz. Glass-short range order of particles.
Quartz-Long range of particles.

If quartz is heated and cooled rapidly it can be converted to glass.

The oxidation state of nitrogen (N) in NaNO3 is +5. option B

To determine the oxidation state of nitrogen (N) in sodium nitrate (NaNO3), we need to assign oxidation numbers to each element in the compound.

In NaNO3, we know that the sodium ion (Na+) has a +1 oxidation state because it is an alkali metal. Oxygen (O) typically has an oxidation state of -2 in compounds, and there are three oxygen atoms in NaNO3. Since the compound is neutral, the sum of the oxidation states must be zero.

Let's assume that the oxidation state of nitrogen is x. Therefore, we can set up the equation:

(+1) + x + (-2) * 3 = 0

Simplifying the equation:

+1 + x - 6 = 0

x - 5 = 0

x = +5

Therefore, the oxidation state of nitrogen (N) in NaNO3 is +5.

The oxidation state of an element indicates the number of electrons it has gained or lost in a compound. In this case, the nitrogen atom in NaNO3 has gained five electrons to achieve a stable oxidation state of +5.

It is important to note that oxidation states are formal charges and do not necessarily represent the actual distribution of electrons in a compound. They are assigned based on a set of rules and can be useful in understanding the reactivity and behavior of elements in chemical reactions.

Option B

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There are many legends of the North Star that have been told over the years by different civilizations and of them is a mythical story told about the existence of the star.

It is said that it is a little dot left behind after God created the stars and based on the fact that the dot was not like the other stars as it was almost an afterthought and then it came to the attention of Luminaria who granted the dot its wish and it became a real star like the others and became the Star of Bethlehem.

Hence, it can be seen that the given legend and mythical stories are just one of the many ways humans try to understand the phenomena of astrology and how they attach certain significance to it.

With this in mind, it is very clear to see that the North Star is a special star.

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The net ionic equation for the reaction between iron (iii) sulfate and potassium hydroxide is

Fe³⁺(aq) + 3OH¯(aq) —> Fe(OH)₃(s) (Option B)

Chemical equations are representations of chemical reactions using symbols and formula of the reactants and products.

The reactants are located on the left side while the products are located on the right side.

Reactants —> Products

The balancing of chemical equations follows the law of conservation of matter which states that matter can neither be created nor destroyed during a chemical reaction but can be transferred from one form to another.

In solution

Fe₂(SO₄)₃ (aq) --> 2Fe³⁺(aq) + 3SO₄²⁻(aq)

KOH (aq) --> K⁺(aq) + OH¯(aq)

The reaction proceeds as follow

Fe₂(SO₄)₃ (aq) + KOH (aq) —>

Fe³⁺(aq) + SO₄²⁻(aq) + K⁺(aq) + OH¯(aq) —> Fe(OH)₃(s) + SO₄²⁻(aq) + K⁺(aq)

Cancel out the spectator ions (i.e SO₄²⁻ + K⁺) and balance to obtain the net ionic equation

Fe³⁺(aq) + 3OH¯(aq) —> Fe(OH)₃(s)

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Answer:

hey what up

Explanation:

Answer: 3 hydrogen atoms; 2.75 x 10^25 molecules NH3

Explanation:

777 g NH3 x (6.02 X 10^23/17 g NH3) =

= 2.75 X 10^25 molecules NH3

Answer:

If a coil of wire is placed in a changing magnetic field, a current will be induced in the wire. This current flows because something is producing an electric field that forces the charges around the wire. (It cannot be the magnetic force since the charges are not initially moving).

Explanation:

Answer:

When a conductor moves through a magnetic field, there will be a generated motional emf. This is one example of Faraday's Law and it arises from the magnetic force. The voltage generated in a length of wire, presuming that the entire length moves through a uniform field, is given below.

Explanation:

To be honest I just googled

Answer:

The melting/ boiling point of selenium is closer to that of sulphur (a non-metal), compared with metals and metalloids. This shows selenium is more likely to be a non-metal, just like sulphur.

Selenium is classified as a metalloid. It has properties of both metals and non-metals, making it difficult to classify as either a metal or a non-metal.

Selenium is generally considered a non-metal, but it has some characteristics of metals as well. It is a semiconductor and an excellent conductor of electricity. Selenium has six valence electrons, which is one less than a typical non-metal, but it is also not a typical metal. Its properties place it in the intermediate category of metalloids.

A type of chemical element known as a metalloid possesses a significant number of properties that fall somewhere in between those of metals and nonmetals or are a combination of them. There is no universal definition of a metalloid, and there is no consensus regarding which elements constitute metalloids.

Metalloids are typically solid at room temperature and are brittle, somewhat shiny substances. Electronic band structures of metalloids are known to be comparable to those of semiconductors or semimetals. Amphoteric or weakly acidic oxides are known to form from metalloids.

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Answer:

3.6

Explanation:

Find the percentage increase then increase it. The increase is about 1.1

Answer:

They vary in number of protons.

Explanation:

This is because they have same atomic number.

\(.\)

Answer:

Isotopos vary in the number of neutrons that the atom has and this affects the mass as the mass is the sum of neutrons and protons.

A diels-alder reaction is an addition type reaction that occurs between a 1,3-diene and an alkene, also known as a dienophile .

The Diels-Alder reaction is the important reaction in the organic chemical reaction in which the reactants will include the substituted alkene and the conjugated diene. The substituted alkene is commonly called  as the dienophile. The reaction gives the rise to the substituted derivative of the cyclohexene.

The Diels - Alder reaction is the chemical reaction in between the conjugated diene and the substituted alkene. The  component of the diene in the Diels – Alder reaction may be either the open - chain or the cyclic, and have the many different types of the substituents.

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Explanation:

Refer to pic...........

To produce 51.0 grams of ammonia using the Haber process, approximately 76.5 grams of hydrogen is needed (based on the stoichiometry of the balanced equation).

In the given balanced equation for the Haber process, it states that three moles of hydrogen gas (H₂) react with one mole of nitrogen gas (N₂) to produce two moles of ammonia gas (NH₃).

To determine the mass of hydrogen needed to produce 51.0 grams of ammonia, we need to set up a proportion using the molar masses and stoichiometric coefficients from the balanced equation.

The molar mass of hydrogen is approximately 2.02 g/mol, and the molar mass of ammonia is approximately 17.03 g/mol.

Using the proportion:

(3 mol H₂ / 2 mol NH₃) = (x g H₂ / 51.0 g NH₃)

Cross-multiplying and solving for x (mass of hydrogen), we get:

x g H₂ = (3 mol H₂ / 2 mol NH₃) * (51.0 g NH₃)

x g H₂ = 76.5 g H₂

Therefore, to produce 51.0 grams of ammonia, approximately 76.5 grams of hydrogen is needed in the Haber process.

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Answer:

a ruler or measuring cups are ways of measuring

Explanation:

Answer:

Explanation:

Strictly speaking, the ruler is the instrument used to rule straight lines and the calibrated instrument used for determining length is called a measure, however common usage calls both instruments rulers and the special name straightedge is used for an unmarked rule.

The number of moles for the quanity 8.06 x\(10_{21\) atoms of Pt​ is approximately 2.61 grams.

To calculate the number of moles for a given quantity of atoms, we can use Avogadro's number and the molar mass of the element. Avogadro's number is 6.022 x 10²³ atoms/mol.

In this case, you have 8.06 x 10²¹ atoms of Pt. To find the number of moles, divide this quantity by Avogadro's number:

8.06 x 10²¹  atoms Pt / 6.022 x 10²³  atoms/mol = 0.0134 mol Pt

So, there are approximately 0.0134 moles of Pt in 8.06 x 10²¹  atoms of Pt.

The molar mass of Pt (platinum) is 195.08 g/mol. To convert the number of moles to grams, multiply the number of moles by the molar mass:

0.0134 mol Pt x 195.08 g/mol = 2.61 g Pt

Therefore, there are approximately 2.61 grams of Pt in 8.06 x10²¹  atoms of Pt.

In summary, the number of moles for the quantity 8.06 x 10²¹ atoms of Pt is approximately 0.0134 moles. This is equivalent to approximately 2.61 grams of Pt. Remember to use Avogadro's number and the molar mass to perform these calculations accurately.

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Explanation:

n2 ×2b is the only solution

Answer:

I think it's D. Please let me know if it's wrong or right.

Explanation:

The amount of heat energy required required to convert 72.0 g

of ice at − 18° C to water at 25° C is 31.9 kJ.

To calculate the amount of heat energy required to convert 72.0 g of ice at −18.0°C to water at 25.0°C, we need to consider two separate processes: first, the energy required to melt the ice (i.e., to convert it from a solid to a liquid), and second, the energy required to heat the liquid water from its initial temperature of 0°C to its final temperature of 25°C.

The energy required to melt the ice can be calculated using the formula:

\(Q1 = m × ΔH_fus\)

where Q1 is the heat energy required (in joules), m is the mass of the ice (72.0 g), and\(ΔH_fus\)is the heat of fusion of water (334 J/g).

Q1 = 72.0 g × 334 J/g = 24,048 J = 24.05 kJ

The energy required to heat the liquid water from 0°C to 25°C can be calculated using the formula:

\(Q2 = m × C × ΔT\)

where Q2 is the heat energy required (in joules), m is the mass of the water (also 72.0 g), C is the specific heat capacity of water (4.184 J/g°C), and ΔT is the change in temperature (25°C - 0°C = 25°C).

Q2 = 72.0 g × 4.184 J/g°C × 25°C = 7,845.6 J = 7.85 kJ

Therefore, the total heat energy required to convert 72.0 g of ice at −18.0°C to water at 25.0°C is:

\(Q_total = Q1 + Q2\) = 24.05 kJ + 7.85 kJ = 31.9 kJ

Therefore, the amount of heat energy required is 31.9 kJ.

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Answer:

A

Explanation:

liquids thake the shape of what holds them so shape is changing and volume is the same

Answer: Chemical change

Explanation:

The kind of change that took place in the combination of sulfuric acid and sugar in this question is Chemical change.

Therefore, the correct option is chemical change since there are new products formed

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The amount of heat energy produced when 1 g of hydrogen and 2 g of nitrogen are reacted, is -6.61 KJ

First, we shall obtain the limiting reactant. Details below:

3H₂ + N₂ -> 2NH₃

From the balanced equation above,

28 g of N₂ reacted with 6 g of H₂

Therefore,

2 g of N₂ will react with = (2 × 6) / 28 = 0.43 g of H₂

We can see that only 0.43 g of H₂ is needed in the reaction.

Thus, the limiting reactant is N₂

Finally, we the amount of heat energy produced. Details below:

3H₂ + N₂ -> 2NH₃ ΔH = -92.6 KJ

From the balanced equation above,

When 28 grams of N₂ reacted, -92.6 KJ of heat energy were produced.

Therefore,

When 2 grams of N₂ will react to produce = (2 × -92.6) / 28 = -6.61 KJ

Thus the heat energy produced from the reaction is -6.61 KJ

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Answer:

\(Y=81.5\%\)

Explanation:

Hello!

In this case, for the given chemical reaction, since it is started with 10.0 g of CO, we can compute the theoretically yielded grams of carbon dioxide given the 2:2 mole ratio between them, on the chemical reaction:

\(m_{CO_2}^{theoretical}=10.0gCO*\frac{1molCO}{28gCO}*\frac{2molCO_2}{2molCO} *\frac{44gCO_2}{1molCO_2} \\\\m_{CO_2}^{theoretical}=15.7gCO_2\)

Next, since the percent yield measures how much of the product is actually yielded, we compute it as shown below:

\(Y=\frac{actual\ yield}{theoretical\ yield}*100\%\)

Whereas the theoretical yield is 12.81 g and the theoretical one that 15.7 g. Therefore, the percent yield turns out:

\(Y=\frac{12.81g}{15.7g}*100\%\\\\Y=81.5\%\)

Regards!

Answer:

A) call Billy Jo Jim Bob

Explanation:

The increasing order of the crystal field splitting- I− < Br− < S2− < SCN− < Cl−< N3 < F−< NCO−< OH−<C2O42−< O2−< H2O < acac− < NCS− < CH3CN <gly <py < NH3 < en  < bipy  < phen  < NO2−  < PPh3 < CN− < CO.

The ligands (affections to a metal ion) are listed in the spectrochemical series according to the strength of their field. The series was created by superimposing various sequences acquired from spectroscopic research because it is impossible to generate the full series by examining complexes with the single metal ion.

The ligands cyanide and CO are classified as strong-field ligands, whereas the halides are weak-field ligands. Ligands such as water and ammonia are said to create medium field effects.

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Answer:

5 atoms

Explanation:

i hope that helps

There are two ways to measure pH: calorimetrically with indicator fluids or sheets and electrochemically with electrodes and a millivoltmeter for greater accuracy (pH meter).

The pH scale is used to indicate how basic or acidic a solution is (pH stands for potential of hydrogen). The pH scale gauges a substance's acidity or basicity. It falls between 0 and 14. Seven is the neutral pH.

The pH scale is a useful tool for illustrating how basic or acidic a solution is. By using the negative logarithm of the hydronium ion concentration, or pH = -log[H3O+], we may determine the pH of a solution.

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Answer: here’s mine :)