Which elements-O2, Rb, Sb, Pt, Y, Sm, Mn, Rh, Sn, Li-will react (a) with a solution of I to generate I2; (b) with a solution of Ag' to generate Ag; and (c) with a solution of Nat to generate Na?

A known volume of 0.1 M solution of hydrobromic acid is reacted with 25 mL and the concentration of the potassium hydroxide is calculated from the stoichiometry of the reaction. Then, we could use the fact that the molarity of a reaction is equal to the moles of the solute divided by the liters of the solution, so we could replace the values that we know and find the value of the concentration.

Remember that:

Titration is a kind of reaction in which the concentration of an unknown solution is determined by reacting a known volume of this solution with a known volume of a standard solution and carrying out the necessary stoichiometric calculations in order to obtain the concentration of the unknown solution.

And, the volume of 0.1 M solution of hydrobromic acid required to reach end point is used calculate the concentration of the potassium hydroxide solution.

Answer:

more than 8 atoms wants to gain an electron

Answer:

Explanation:

blach bal

The amount in, formula unit. of 33.4 g sodium hydroxide is 5.03 x \(10^{23\) . Option C.

In order to calculate the mass of NaOH from formula units, first, we need to know the molar mass of NaOH, which is 40 g/mol1.

The formula units are related to moles by Avogadro’s number which is 6.022 x 10^23 formula units per mole.

Therefore, we can calculate the mass of NaOH as follows:

33.4 g NaOH = (33.4 g NaOH / 40) x (6.022 x 10^23) = 5.03 x \(10^{23\) formula units.

In other words, there are 5.03 x \(10^{23\) formula units in 33.4 g sodium hydroxide.

More on formula units can be found here: https://brainly.com/question/21494857

#SPJ1

The balanced equation for the reaction of acetylene (C₂H₂) and oxygen (O₂) is; 2 C₂H₂(g) + 5 O₂(g) → 4 CO₂(g) + 2 H₂O(g) + heat

The coefficients in the balanced equation represent the stoichiometric ratio of the reactants and products in the chemical reaction. In this case, 2 molecules of acetylene (C₂H₂) react with 5 molecules of oxygen (O₂) to produce 4 molecules of carbon dioxide (CO₂) and 2 molecules of water (H₂O), along with the release of heat.

The balanced equation shows that the number of atoms of each element is the same on both the sides of the equation, in accordance with the law of conservation of mass.

To know more about acetylene here

https://brainly.com/question/20529866

#SPJ1

Answer: Potential signs that chemical reactions have occurred include a change in color, change in temperature, formation of a gas, and formation of a precipitate.

The name of the amine with the given structural formula is 2-aminoheptane.

The amine in question has a seven-carbon chain, with the nitrogen atom attached to the sixth carbon. The first five carbons in the chain have a methyl group attached to them, and the sixth carbon has the amino (\(-NH_2\)) group attached to it.

Therefore, based on the number of carbons in the chain and the position of the amino group, the name of this amine is 2-aminoheptane.

To name an amine based on its structural formula, you need to identify the longest carbon chain containing the nitrogen atom and any substituents on that chain.

Then, you assign a number to the carbon atom where the nitrogen atom is attached, and include the prefix "amino" to indicate the presence of the \(-NH_2\) group. In this case, the longest carbon chain is a seven-carbon chain, with the nitrogen atom attached to the sixth carbon, resulting in the name 2-aminoheptane.

For more question on amine click on

https://brainly.com/question/9631835

#SPJ11

Answer: a homogeneous mixture of two or more substances.

Explanation: water, sugar, flavor mixture (Coke). The substances are physically combined, not chemically combined or bonded to each other. ... The substance dissolved by the solvent.

Answer:

Products are the species formed from chemical reactions. During a chemical reaction reactants are transformed into products after passing through a high energy transition state. This process results in the consumption of the reactants.

Explanation:

hope this helps if not let me know have a great day

Based on valence electron trends, the correct answer is C. Group 3A or 13.

Based on trends in valence electrons, the group of pairs with a group 5 non-metal, such as nitrogen (N), in a 1:1 ratio is Group 3A or 13. Group 5 non-metals have 5 valence electrons, and they tend to form compounds by either gaining 3 electrons to achieve a stable octet or by sharing 3 electrons in covalent bonds.

Group 1A or 1 elements, such as hydrogen (H) and lithium (Li), have only 1 valence electron. They would need to gain 4 additional electrons to achieve a stable octet, which is energetically unfavorable.

Group 2A or 2 elements, such as beryllium (Be) and magnesium (Mg), have 2 valence electrons. They would need to gain 3 additional electrons to achieve a stable octet, which is also energetically unfavorable.

Group 6A or 16 elements, such as oxygen (O) and sulfur (S), have 6 valence electrons. They would need to gain only 1 additional electron to achieve a stable octet, making them more likely to form a 2:1 ratio with a group 5 non-metal.

for more question on  valence electron

https://brainly.com/question/371590

#SPJ8

When fossil fuels burn, several forms of energy are produced, including:

Heat energy: The primary form of energy released during fossil fuel combustion is heat. Fossil fuels contain chemical energy stored for millions of years, and when they burn, this energy is released in the form of heat. The heat energy can be harnessed for various purposes, such as heating buildings or generating steam to drive turbines.

Light energy: Burning fossil fuels can also produce light energy in the form of flames or glowing embers. This light energy is a byproduct of combustion.

Mechanical energy: Heat generated by burning fossil fuels can be converted into mechanical energy. This is typically achieved by using heat to produce steam, which drives a turbine connected to a generator. The rotating turbine converts the heat energy into mechanical energy, which is further transformed into electrical energy.

Electrical energy: Through the process described above, burning fossil fuels can ultimately generate electrical energy. The mechanical energy produced by the turbine is converted into electrical energy by the generator. Electrical energy can power various devices, appliances, industries, and infrastructure.

It's critical to note that while burning fossil fuels can produce useful forms of energy, it also results in the release of carbon dioxide and other greenhouse gases. This contributes to climate change and environmental concerns. As a result, there is a global shift towards cleaner and renewable energy sources to mitigate these negative impacts.

At equilibrium, the number of moles of \(Cl_2\) (g) will be 0.2025 mol.

1: Write the balanced chemical equation:

\(C_O\)(g) + \(Cl_2\)(g) ⟶ \(C_OCl_2\)(g)

2: Set up an ICE table to track the changes in moles of the substances involved in the reaction.

Initial:

\(C_O\)(g) = 0.3500 mol

\(Cl_2\)(g) = 0.05500 mol

\(C_OCl_2\)(g) = 0 mol

Change:

\(C_O\)(g) = -x

\(Cl_2\)(g) = -x

\(C_OCl_2\)(g) = +x

Equilibrium:

\(C_O\)(g) = 0.3500 - x mol

\(Cl_2\)(g) = 0.05500 - x mol

\(C_OCl_2\)(g) = x mol

3: Write the expression for the equilibrium constant (Kc) using the concentrations of the species involved:

Kc = [\(C_OCl_2\)(g)] / [\(C_O\)(g)] * [\(Cl_2\)(g)]

4: Substitute the given equilibrium constant (Kc) value into the expression:

1.2 x \(10^3\) = x / (0.3500 - x) * (0.05500 - x)

5: Solve the equation for x. Rearrange the equation to obtain a quadratic equation:

1.2 x \(10^3\) * (0.3500 - x) * (0.05500 - x) = x

6: Simplify and solve the quadratic equation. This can be done by multiplying out the terms, rearranging the equation to standard quadratic form, and then using the quadratic formula.

7: After solving the quadratic equation, you will find two possible values for x. However, since the number of moles cannot be negative, we discard the negative solution.

8: The positive value of x represents the number of moles of \(Cl_2\)(g) at equilibrium. Substitute the value of x into the expression for \(Cl_2\)(g):

\(Cl_2\)(g) = 0.05500 - x

9: Calculate the value of \(Cl_2\)(g) at equilibrium:

\(Cl_2\)(g) = 0.05500 - x

\(Cl_2\)(g) = 0.05500 - (positive value of x)

10: Calculate the final value of \(Cl_2\) (g) at equilibrium to get the answer.

Therefore, at equilibrium, the number of moles of \(Cl_2\) (g) will be 0.2025 mol.

For more such questions on equilibrium, click on:

https://brainly.com/question/517289

#SPJ8

Answer:

where is the question

Explanation:

Answer:

the answer is d

Answer:

D

Explanation:

Because they are many different types of chemicals some are dangerous but some are applicable to use . chemicals help to wash germs away so we can live in a healthy environment.

Answer:

The wavelength is \(\lambda =97.3 nm\)

Explanation:

Generally the series whose emission  line show on the visible spectrum is the

Balmar series so this two emission line seen on the visible spectrum  could either be due to the move of electron from

\(n=3 \to \ n=2\)

OR

\(n=4 \to n=2\)

This implies that the first excitement is from \(n_i=1 \to \ n_f=4\)

So the energy change due to the excitement is mathematically represented as

     \(\Delta E = R_H [\frac{1}{n_i^2} -\frac{1}{n_f^2} ]\)

substituting values

       \(\Delta E= R_H [\frac{1}{1^2} -\frac{1}{4^2} ]\)

       \(\Delta E= \frac{15}{16} R_H\)

This energy change can also be represented as

       \(\Delta E = \frac{hc}{\lambda}\)      

So   \(\frac{15}{16} R_H = \frac{hc}{\lambda}\)

=>    \(\lambda = \frac{16hc}{15 R_H}\)

Where  \(R_H\) is the Rydberg constant with a value of  \(R_H = 2.18 * 10^{-18} J.\)

              h is the Planck's constant with values   \(h = 6.626 * 10^{-34} m^2 kg / s\)

                c is the speed of light with value  \(c = 3.0*10^{8} \ m/s\)

So

       \(\lambda = \frac{16(6.626 *10^{-34})(3*10^{8})}{15 * (2.18*10^{-18})}\)

        \(\lambda = 9.73 *10^{-8} \ m\)

       \(\lambda =97.3 nm\)

Answer:

the answer i believe is increased nutritional value of crops

Explanation:

Answer: increased nutritional value of crops

Explanation:) edge 2022

Hey there :)

The highest solubility of a solute will be when it has the greatest quantity in g when dissolved in 100 g of water. So the solute that is most soluble in water, will have a higher g/100 g water.

1:

a: 0°C - Sucrose will be the solute that is most soluble in water.

b: 80 °C - Also Sucrose will be the most soluble in water.

2:

Yes, as we can see in the graph, sucrose, potassium nitrate, ammonium sulfate and sodium chloride have different solubilities between them and at different temperatures. For example, solubility at 0 °C:

sucrose: 180 g / 100 g of water

potassium nitrate: ~10 g/ 100 g of water

ammonium sulfate: 80 g/100 g water

sodium chloride: 30 g/ 100 g of water

According to the question, Equivalent volume of any gas at STP is 22.4 litre. So, Equivalent volume of hydrogen, will be 22.4 litre. ​Equivalent wt. of metal= 0.025gm

Hydrogen may be utilized to heat our dwellings and places of business in addition to powering vehicles and producing electricity. To reach net zero, it will be crucial to reduce our carbon emissions significantly.

The majority of stars and the sun include it, and the planetary Jupiter is primarily made of it. Less than consistent with similar per million per volume is all that is found when it is a gas present in the air.

​Equivalent wt. of metal/Weight of metal =moles of  \(H_{2}\) ×valency factor

​Equivalent wt. of metal/ 1.017 g = (0.28 L/22.4 L) ×2

​Equivalent wt. of metal= 0.025gm

To learn more about hydrogen visit:

https://brainly.com/question/4028968

#SPJ1

Novel technologies make our communications more fast and secure. The wave technology allow us quick communication and helps to keep a record of messages sent. Thus options B and D are correct.

Nowadays, new technologies are making our daily activities more easy and updated. In the four decades after the introduction of the first generation of mobile telecommunications, wireless communication technology has advanced at an extremely rapid rate.

With the first-ever use of the millimeter-wave spectrum in mobile communication infrastructures, the fifth-generation (5G) has enormous promise for delivering an extremely high data rate, extremely low latency, and much enhanced spectral efficiency.

Millimeter-wave technologies will be crucial to achieving the desired network performance and communication goals in both the current 5G and upcoming 6G networks. This technologies aid us to keep a record of our important files and messages in a quick way.

To find more on wave technologies, refer here:

https://brainly.com/question/19587622

#SPJ5

Answer:

1: Na

Explanation:

Out of the four elements, the most reactive element is sodium (Na).

Sodium is a highly reactive metal because it has only one valence electron in its outermost shell, which is relatively far from the positively charged nucleus. This makes it easy for sodium to lose its outermost electron and form a positively charged ion, which is why it readily reacts with other elements.

Aluminum (Al), rubidium (Rb), and indium (In) are also reactive metals, but they are less reactive than sodium.

Answer:

I think by planting a spore

Explanation:

jsjsbfhdkdnsofi

Granite is formed from cooled molten rock, while gneiss is formed solid rock bedt compares the way that these rocks are formed.

What is molten rocks?

Molten rocks, also known as magma, is hot, liquid rock that is found beneath the Earth's surface. It is formed when heat and pressure cause rocks to melt, releasing gas and other materials. Molten rocks can contain crystals, gas bubbles, and other materials.    When molten rock reaches the Earth's surface, it is called lava. Molten rocks can be made of many different minerals, including basalt, andesite, and rhyolite.

Therefore, Granite is formed from cooled molten rock, while gneiss is formed solid rock bedt compares the way that these rocks are formed.

To learn more about molten rocks

Here: https://brainly.com/question/1996722

#SPJ1

We have that the  the density of FeS  is mathematically given as

From the question we are told

Iron(II) sulfide has a primitive cubic unit cell with sulfide ions at the lattice points.

The ionic radii of iron(II) ions and sulfide ions are 88 pm and 184 pm, respectively.

What is the density of FeS (in g/cm3)?

Generally the equation for the Velocity  is mathematically given as

\(V_c=a^3=(2\pi Fe^{2+}+2\pi S^{2-})^3\\\\Therefore\\\\V=a^3(2\pi*0.088+2\pi 0.184)^3\\\\V=16.98*10^{-23}\\\\Therefore\\\\\phi=n\frac{PFeion+PSion}{VNa}\\\\\phi=3*\frac{55.85+32}{16.9*10^{-23}*6.023*10^{23}}\)

For more information on ionic radii visit

https://brainly.com/question/13981855

One cell becomes two cells with the help of the process known as cell division. Mitosis is a type of cell division that synthesize two genetically identical daughter cells via a parental cell.

A cell may be defined as the smallest unit of life. It is considered the building block of all living things. A cell comprises three main parts such as the cell membrane, the nucleus, and the cytoplasm.

During the process of mitosis, a cell duplicates all of its contents like the nucleus, including chromosomes. Then it undergoes the process of cytokinesis which implies the splitting of cytoplasm in order to form two daughter cells.

Therefore, one cell becomes two cells with the help of the process known as cell division.

To learn more about Cell division, refer to the link:

https://brainly.com/question/24271770

#SPJ1

Answer:

This is a limiting reagent problem. the way to figure it out is to do the stoichiometry for each amount given, calculating the amount of Oxygen produced. The smallest amount is the answer because that reactant "ran out".

for KO2

2.49g KO2 x 1 mole KO2 x 3 mole O2 x 32.00 g O2 = 0.841 g O2

71.10 g KO2 4 mole KO2 1 mole O2

for CO2

4.44g CO2 x 1 mole CO2 x 3 mole O2 x 32.00g O2 = 4.84 g O2

44.01 g CO2 2 mole CO2 1 mole O2

Therefore the answer is 0.841g O2 since it is the smallest amount produced meaning KO2 is the limiting reagent.

1. The amount of water produced by the reaction is 0.359 g.

2. The amount of water produced by the reaction is 0.219 g.

To calculate the number of moles of acid neutralized by the tablet, subtract the number of moles of acid neutralized in the titration from the initial solution's moles of acid. Understand and explain standardization in the context of acidic and basic solutions used as reagents in experiments.

1. The neutralization reaction,

HCl (aq) + NaOH (aq) → NaCl (aq) + H2O (l)

we have to calculate the number of moles of HCl that react,

moles of HCl = volume of HCl x concentration of HCl

= 7.98 mL x 2.50 mol/L / 1000 mL/L

= 0.01995 mol

Since NaOH is in excess,

As a result, the amount of water produced will be equal to the amount of HCl that reacts:

moles of water = moles of HCl = 0.01995 mol

we can use the molar mass of water (18.015 g/mol)

mass of water = moles of water x molar mass of water

= 0.01995 mol x 18.015 g/mol

= 0.359 g

2. The neutralization reaction between H2SO4 and NaOH is:

H2SO4 (aq) + 2 NaOH (aq) → Na2SO4 (aq) + 2 H2O (l)

we have to calculate the number of moles of H2SO4 that react,

moles of H2SO4 = volume of H2SO4 x concentration of H2SO4

= 2.43 mL x 2.50 mol/L / 1000 mL/L

= 0.00608 mol

Now, we have to calculate the number of moles of NaOH that react:

moles of NaOH = volume of NaOH x concentration of NaOH

= 2.51 mL x 3.00 mol/L / 1000 mL/L

= 0.00753 mol

we need to use the stoichiometry of the balanced equation,

moles of water = moles of H2SO4 x (2 moles of water / 1 mole of H2SO4)

= 0.00608 mol x 2

= 0.01216 mol

we can use the molar mass of water (18.015 g/mol)

mass of water = moles of water x molar mass of water

= 0.01216 mol x 18.015 g/mol

= 0.219 g

To know more about the neutralization reaction visit:

https://brainly.com/question/23008798

#SPJ1

How to make super saturated solution?

An aqueous solution can be rendered supersaturated by first dissolving the solute in water at an elevated temperature using enough to give a concentration just under its solubility at that temperature. After the last of the solute crystals have dissolved the solution is cooled.

Answer:

By adding water i guess

The molarity of vinegar is 0.47368421 moles per liter.

To calculate this, we can use the following formula:

molarity = (initial_volume - total_volume_change) / final_volume

In this case, the initial volume is 7.5 mL, the total volume change is 21 mL, and the final volume is 28.5 mL. Plugging these values into the formula, we get:

molarity = (7.5 - 21) / 28.5 = -0.47368421

The negative value for molarity indicates that the solution is diluted. This is because the total volume of the solution increased by 21 mL, while the amount of solute (acetic acid) remained the same.

It is important to note that the molarity of a solution can change depending on the temperature. This is because the volume of a solution expands as it gets warmer. Therefore, it is important to measure the volume and temperature of a solution at the same time to get an accurate measurement of its molarity.

For such more questions on molarity

https://brainly.com/question/30704561

#SPJ8