Which of these compounds is most likely to contain an ionic bond?
O CaCl2
O CHA
SO2
O H2

Answer:

Explanation:

Here, we want to answer the questions after balancing the chemical reaction

We have this balanced chemical reaction as follows:

We have balanced the chemical reaction, we can now proceed to answer the questions:

1) In the balanced reaction, we can see 6 nitrate molecules on the reactant side, and we have 6 nitrate molecules on the product side

2) Here, we want to describe the steps involved in balancing a chemical reaction:

a) We count the number of each of the atoms or molecules on both the reactant and product side

b) We place the right coefficients at the front of each element or group of elements and see if the particular element is of the same count on both the reactant and product side

c) We repeat steps a and b until we have a chemical reaction that is balanced

3) To indicate the physical state, we use the first letter in the name of the state, place in parentheses and use as a subscript

For the gaseous state, we have the indication as (g)

For the liquid state, we have the indication as (l)

For the solid-state, we have the indication as (s)

The exception is the aqueous state where we have (aq) as the indication

The molarity of aqueous lithium bromide, LiBr solution is 0.2 M

We'll begin by calculating the number of mole of Pb(NO₃)₂ in the solution.

Mole = Molarity x Volume

Mole of Pb(NO₃)₂ = 0.25 × 0.01

Mole of Pb(NO₃)₂ = 0.0025 mole

Next, we shall determine the mole of LiBr required to react with 0.0025 mole of Pb(NO₃)₂

Pb(NO₃)₂ + 2LiBr —> PbBr₂ + 2LiNO₃

From the balanced equation above,

1 mole of Pb(NO₃)₂ reacted with 2 mole of LiBr.

Therefore,

0.0025 mole of Pb(NO₃)₂ will react with = 2 × 0.0025 = 0.005 mole of LiBr

Finally, we shall determine the molarity of the LiBr solution

Molarity = mole / Volume

Molarity of LiBr = 0.005 / 0.025

Molarity of LiBr = 0.2 M

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Answer:

Volume = 3.4 L

Explanation:

In order to calculate the volume of CO₂ produced when 15.2 g of CaCO₃ is heated, we need to first write out the balanced equation of the thermal decomposition of CaCO₃:

CaCO₃ (s) + [Heat] ⇒ CaO (s) + CO₂ (g)

Now, let's calculate the number of moles in 15.2 g CaCO₃:

mole no. = \(\mathrm{\frac{mass}{molar \ mass}}\)

                 = \(\frac{15.2}{40.1 + 12 + (16 \times 3)}\)

                 = 0.1518 moles

From the balanced equation above, we can see that the stoichiometric molar ratios of CaCO₃ and CO₂ are equal. Therefore, the number of moles of CO₂ produced is also 0.1518 moles.

Hence, from the formula for the number of moles of a gas, we can calculate the volume of  CO₂:

mole no. = \(\mathrm{\frac{Volume \ in \ L}{22.4}}\)

⇒ \(0.1518 = \mathrm{\frac{Volume}{22.4}}\)

⇒ Volume = 0.1518 × 22.4

                 = 3.4 L

Therefore, if 15.2 g of CaCO₃ is heated, 3.4 L of CO₂ is produced at STP.

The fact that the infrared thermometers used in medical research were first intended to detect the temperature on Mars has had an impact on that field of study.

Technology for use in outer space, in aviation or other operations outside of Earth's atmosphere, for things like spaceflight, space exploration, and Earth observation, is referred to as space technology.

By enabling high-speed data transport with the development of the internet, enabling research of global natural phenomena, and enabling environmental monitoring, space technology started to be employed for telecommunications and the environment.

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Ionization levels are most highest on the top right side of the Periodic Table. The type of gases that would be in the top right are noble gases, like helium, and other common noble gases.

Hope this answer helps you!

To determine the maximum \(Fe_2(SO_4)_3\) produced, we find the limiting reactant (Fe), calculate theoretical yield (0.3383 mol), and obtain a percentage yield of 47.56%.

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First, we need to write the balanced chemical equation for the reaction:

2 NO2(g) + H2O(l) → HNO3(aq) + NO(g)

From the equation, we can see that 2 moles of NO2 react with 1 mole of H2O to produce 1 mole of HNO3 and 1 mole of NO. Therefore, we need to determine which reactant is limiting and calculate the amount of HNO3 that can be produced based on that.

To do this, we can use the mole ratio of NO2 to H2O:

5.0 mol NO2 × (1 mol H2O / 2 mol NO2) = 2.5 mol H2O

Since we have 11.0 mol of H2O, it is not limiting and we will use up all of the NO2.

Therefore, we can calculate the amount of HNO3 that can be produced from 5.0 mol of NO2:

5.0 mol NO2 × (1 mol HNO3 / 2 mol NO2) = 2.5 mol HNO3

Therefore, the largest amount of HNO3 that could be produced is 2.5 mol, rounded to the nearest 0.1 mol.

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A 52gram sample of water that has an initial temperature of 10C absorbs 4130 joules. If the specific heat of water is 4.184 j.  25°C is the final temperature of the water.

The physical concept of temperature indicates in numerical form how hot or cold something is. A thermometer is used to determine temperature. Thermometers are calibrated using several temperature scales, which traditionally drew on different reference locations.

The most popular scales include the Celsius scale, sometimes known as centigrade, with the unit symbol °C, the scale of Fahrenheit (°F), or the Kelvin scale (K), with the latter being mostly used for scientific purposes.

q = m×c×ΔT

4130 = 52×4.184×(T2- 10C)

T2= 25°C  

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Answer:

Fluorine (F)

Explanation:

The poorest conductor of electricity from the given choices is fluorine. This is because fluorine is a non - metal.

Like other non - metals, fluorine does not conduct electricity.

Only metals are known to conduct electricity and heat readily.

Semi - metals like silicon will conduct electricity under specific condition.

The free mobile electrons in metals makes it easy for them propagate electricity

Answer:

Which type of chemistry studies the chemical reactions that occur in the human body? .

biochemistry

The correct answer is biochemistry.

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Answer:

Fermentation

Explanation:

Fermentation is the general term used to describe the process by which sugars such as glucose, starch or cellulose are converted to ethanol and carbon (iv) oxide. It is anaerobic process meaning that it occurs in the absence of air or in very low oxygen concentrations.

Yeast and other microorganisms ferment glucose into ethanol and carbon (iv) oxide with the help of the enzyme zymase. Polysaccharides such as starch and cellulose are first broken down into glucose by enzymes such as diastases, maltase and cellulase, before it is then converted into ethanol and carbon (iv) oxide.

The equation for the conversion of glucose to ethanol and carbon (iv) oxide is as follows:

C₆H₁₂O₆(aq) -----> 2C₂H₅OH(aq) + 2CO₂(g)

Answer:

Explanation:

Answer:

i think Aluminum (Al) oxidized, zinc(Zn) reduced

it takes specific amount of energy to remove exactly one electron from an atom.

What is electron?

Electron is a stable sub atomic particle with a charge of negative electricity found in all atoms and acting as the primary Carrier of electricity in solid.

1-This is shown by the equation where the orbit of the electron around a proton is equal to the quantum. The quantities energy level, times a wavelength.

2-So this is this equation and then abruptly hypothesis links quantities. Energy states with a standing wave function so as that the energy of the election on increases its orbit must also increase.

3- And as considering the wavelength, we're assuming station is constant. Two pies are the only constants, and they aren't changing. It does.

4-As the energy or quantifies energy level of an electron increases its radius around the nucleus must increase.

5- Also, if its energy level decreases, its radius must also decrease. So this hypothesis ties together quantities, energy levels and the relationship and its relationship with the size of the circumference around it. A nucleus which is also the electron.

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The molar mass is 3230.8 g/mol

First, we need to know that the formula for the general gas law  is represented as;

PV = nRT

such that the parameters are;

Substitute the values

1 × 2.33 = n × 8.314 × 433.15

Multiply the values, we get;

n = 2.33/ 8.314 × 433.15

Divide the values

n = 6.5 × 10⁻⁴ moles

But, number of moles = mass/molar mass

Molar mass = 2.10/ 6.5 × 10⁻⁴

Molar mass = 3230.8 g/mol

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We can see here that the catalytic cycle for the hydrogenation of alkenes using Wilkinson's catalyst involves several steps.

Here's an overview of the catalytic cycle, including the necessary details:

i. Chemical structure of the catalyst:

Wilkinson's catalyst, also known as chloridotris(triphenylphosphine)rhodium(I), has the following chemical structure: [RhCl(PPh3)3]

ii. Molecular geometry of the catalyst:

The Wilkinson's catalyst has a trigonal bipyramidal geometry around the rhodium center. The three triphenylphosphine (PPh3) ligands occupy equatorial positions, while the chloride (Cl) ligand occupies an axial position.

iii. Type of reactions involved:

The catalytic cycle involves several reactions, including:

iv. Starting material, reagent, and solvent:

The starting material is an alkene, and the reagent is Wilkinson's catalyst ([RhCl(PPh3)3]). The reaction is typically carried out in a suitable solvent, such as dichloromethane (CH2Cl2) or tetrahydrofuran (THF).

v. Major and minor end-products:

The major end-product of the hydrogenation reaction is the fully saturated alkane, resulting from the addition of hydrogen across the double bond. The minor end-product may include cis- or trans-configured alkanes if the original alkene substrate possesses geometric isomers.

vi. Intermediates:

The intermediates in the catalytic cycle include:

These intermediates play a crucial role in facilitating the hydrogenation reaction and enabling the catalytic cycle to proceed.

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The percent by mass of the fluorine in the compound is 46.472%.

We know that the percent by mass has to do with the ratio of the total mass of the atom that is part of the compound and the total molar mass of the compound multiplied by one hundred.

The question in this case has demanded that we ought to obtain the mass percent of fluorine from the compound that we can be able to identify from the formula of the compound that is shown here as xenon hexa fluoride.

Mass of the compound can be obtained from; 131 + 6(19)

= 245 g/mol

The total mass of the fluorine atom in the compound is 114 g

Thus we have the use of;  114 /245 * 100/1

= 46.472%

The percent  by mass is now gotten for the fluorine atom as 46.472%.

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Now, we can calculate the percent yield of carbon dioxide using the following equation Percent yield of CO2 = 61.5% .

Carbon dioxide (CO2) is a colorless, odorless gas composed of one carbon atom and two oxygen atoms. It exists in the Earth's atmosphere as a trace gas, making up approximately 0.04% of the atmosphere by volume. In nature, it is produced by the respiration of living organisms and through the decay of organic matter. It is also a byproduct of many human activities such as burning fossil fuels, producing cement, and manufacturing plastic. Carbon dioxide is an important greenhouse gas, which means it absorbs and traps heat in the atmosphere, resulting in global warming.

The given reaction is:

CH3CH2CH3 + O2 → CO2 + H2O

Given:

m(octane) = 20.6 g

m(O2) = 98.6 g

m(CO2) = 29.2 g

Using the given information and the balanced equation, we can determine the theoretical yield of carbon dioxide by using the following equation:

m(CO2) (theoretical) = (m(octane) × molar mass of octane) / molar mass of CO2

m(CO2) (theoretical) = (20.6 g × 72 g/mol) / 44 g/mol

m(CO2) (theoretical) = 47.45 g

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Explanation:

It is the emission of electron from a metal under the effect of light is known as photo electric effect

I hope this imformation help full for you

Answer:

can you repost with picture? I can help.

Option C) New atoms are created when a new substance is formed is not true about the Law of Conservation of Mass.

The Law of Conservation of Mass states that "Mass can neither be created nor be destroyed". This means that the mass of an object will remain the same, regardless of the changes that occur to its form or composition. The law is a fundamental principle of physics and chemistry and is used to calculate the amount of matter that is present in a given sample.

The same number of atoms are in both the products and reactants as the mass of the reaction is conserved.

Since the same number of atoms are present in both reactants and products, then no new atoms or compounds are created in the process.

Hence, the correct option is C).

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Answer: The particles can move apart only if they have enough kinetic energy to overcome this force of attraction. If particles do not have enough kinetic energy to overcome the force of attraction between them, matter exists as a solid. What is particle kinetic energy? Kinetic energy is energy that an object has because of its motion. The Kinetic Molecular Theory explains the forces between molecules and the energy that they possess.

Answer:

check your question it's not correct

Models can be used to represent a process or show the composition of a material. For example, a model of an atom shows what matter is made out of and how it is composed. Scientists have been using models since ancient times to help explain the world around us. Models help you understand something that you cannot see or touch by making it visible or giving it a form that you can physically explore. In this case, the model lets scientists explore atoms without having to use an electron microscope. This method provides them with up-close images from different angles so they can learn about their properties in detail.

The Sun-Earth-Moon system is important because it sustains life on Earth, regulates Earth's climate, and influences natural phenomena like tides.

The Sun-Earth-Moon system plays a vital role in supporting and sustaining life on Earth. The Sun is the primary source of energy for our planet, providing heat and light necessary for photosynthesis, the process by which plants convert sunlight into food and oxygen. Sunlight is also crucial for maintaining Earth's temperature and driving weather patterns.

The Moon, as Earth's only natural satellite, contributes to several essential functions. Its gravitational pull creates the tides, which influence coastal ecosystems and shape coastal landscapes.

The Moon's orbit also stabilizes Earth's axial tilt, providing a stable climate for life to thrive. Additionally, the Moon's phases have cultural and historical significance, influencing human activities such as agriculture, navigation, and calendar systems.

The Sun-Earth-Moon system's interactions are responsible for natural phenomena like eclipses, both solar and lunar, which have fascinated humans throughout history and continue to be important for scientific study and exploration.

Understanding these celestial events enhances our knowledge of astrophysics and helps us comprehend the vastness and complexity of the universe.

Furthermore, the study of the Sun-Earth-Moon system provides insights into celestial mechanics, orbital dynamics, and the broader field of planetary science. By examining the interplay between these celestial bodies, scientists can gain a deeper understanding of Earth's place in the universe and explore potential habitable conditions on other celestial bodies.

Overall, the Sun-Earth-Moon system is of immense importance as it sustains life, regulates climate, influences natural phenomena, and provides a platform for scientific exploration and discovery.

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Answer:

Percent yield = 17.3%

Explanation:

The percent yield is defined as 100 times the ratio between actual yield in grams and theoretical yield in grams (123g).

Percent Yield = Actual Yield / Theoretical yield (123g) * 100

To find actual yield we need to convert the 0.209moles to grams:

Actual yield -Molar mass Al2O3: 101.96g/mol-

0.209mol * (101.96g/mol) = 21.3g

Percent yield = 21.3g / 123g * 100

Percent yield = 17.3%

Answer:

a) pH= 13.3

b) pOH= 0.7

c) [H+]= 5.01*10^-14M

d) [OH-]= 0.2M

Explanation:

The formula of sodium hydroxide is NaOH. In the molecule there are Na+ ions and OH- that dissociates like this:

That means that 1 mole of NaOH dissociates into 1 mole of Na+ ions and 1 mole of OH-.

So, for a 0.2M solution, 0.2 moles of NaOH will dissociate into 0.2 moles of Na+ ions and 0.2 moles of OH-.

d) [OH-]

From the dissociation of NaOH we know that the concentration of OH- is [OH-]=0.2M.

b) pOH

With the concentration of OH-, we can calulate the pOH:

So, the pOH is 0.7.

a) pH

Knowing the pOH and the following formula, we can calculate the pH of the solution:

The pH of the solution is 13.3.

c) [H+]

Now that we know thw pH of the solution, we can calculate the concentration of H+:

So, the concentration of H+ is 5.01*10^-14M.

Answer:

very few

Explanation:

this should be right