The chemical compound, "AB" has a molar mass of 74.548 g/mol.
What is the percent by mass of B in AB? (Mass of A = 39.098 g/mol,
B = 35.45 g/mol)

18 electrons.

According to the question, we have that sulphur has 16 electrons and after bonding with magnesium acquired a 2-charge. The sulphur ion S2- shows that sulphur has gained 2electrons to become stable.

Amount of electron S2- have = 16 electron + 2electrons

Amount of electron S2- have = 18 electrons

Hence the number of electrons S2- ion have is 18 electrons.

Answer:

32.065

Hope this helps

Answer:

not

medium

Explanation:

Light radiation travels as a wave and does not require a medium for travel. Like all electromagnetic radiations, light does not need medium particles for its propagation.

To balance the equation we have to find a combination of coefficients for the species that make the number of each element on both sides of the equation equal.

C₂H₅OH + 3O₂ → 2CO₂ + 3H₂O

Checking to ensure the reactant and product sides of the equation are equal.

       Reactants  Products

C          2                 2

H          6                 6

O          7                 7

Answer:

1 = 7.5m/s and 2 = 8m/s

Explanation:

For question no. 1

Given

wavelength = 5 m

Frequency = 1.5 Hz

Velocity =?

We have the formula that

Velocity = wavelength * frequency

= 5 * 1.5

= 7.5 m/s

For question no. 2

Frequency = 2 Hz

Wavelength = 4 m

Velocity = ?

We have the formula that

Velocity = wavelength * frequency

= 4* 2

= 8 m/s

Hope it will help :)

Answer:

1. 7.5m/s

2. 8m/s

Explanation: velocity = Wavelength x Frequency so 5m*1.5Hz=7.5m/s and 2Hz*4m=8m/s

If the balloon is closed, then yes, both volume and pressure will increase when the gas inside is heated.

What is pressure?

Pressure is the force applied perpendicular to the surface of an object per unit area over which that force is distributed.

Various units are used to express pressure. Some of these are units of force divided by units of area. For example, the SI unit of pressure, Pascal (Pa), is 1 Newton per square meter (N/m2). Similarly, pounds force per square inch (psi, symbol lbf/in2) is the traditional unit of pressure in imperial and US systems. Pressure can also be expressed as standard atmospheric pressure. Atmospheric pressure (atm) is equal to this pressure and torr is defined as 1/760 of this. Manometric units such as centimeters of water, millimeters of mercury, and inches of mercury are used to express pressure as the height of a particular liquid column within a manometer.

If the balloon is closed, then yes, both volume and pressure will increase when the gas inside is heated.

To know more about Pressure, visit:

https://brainly.com/question/28012687

#SPJ4

The energy radiation per unit area of the material is 1882.12 W/m².

The energy radiation per unit area of a material whose emissivity is 0.694 and temperature is 5.43×10³K can be calculated using the Stefan-Boltzmann law.

The Stefan-Boltzmann law states that the power radiated per unit area (P) by an object is proportional to the fourth power of its temperature (T) and emissivity (ε). The constant of proportionality is the Stefan-Boltzmann constant (σ).Mathematically, this can be represented as:P = σεT⁴Here, σ = 5.67 x 10⁻⁸ W/m²K⁴Given that ε = 0.694 and T = 5.43 x 10³K, substituting these values in the above equation we get:P = 5.67 x 10⁻⁸ x 0.694 x (5.43 x 10³)⁴P = 1882.12 W/m²

Therefore, the energy radiation per unit area of the material is 1882.12 W/m².

To know more about Stefan-Boltzmann law , visit;

https://brainly.com/question/30763196

#SPJ11

Answer: The options are not given, here are the options from another websites.

A. A +2, B +8

B. A +2, B -4

C.A +5, B +5

The correct option is C.

Explanation:

This is because there is sharing of charge between the two metal objects and are both positive. Normally when two positive objects come together, they repel each other. which means that positively charged object A will exert a repulsive force on the other positively charged object. The repulsive force that is created between them will push the two objects apart.

Answer: 4 ATP molecules is produced in the glycolysis of 2 glucose molecules

The first stage of most carbohydrate catabolism, which is described as the breakdown of larger molecules into smaller ones, is glycolysis, which is a part of cellular respiration. Two Greek words that mean "to break down anything sweet" are the source of the word glycolysis. Two molecules of ATP are created during the breakdown of glucose and formation of pyruvate during glycolysis.

Explanation:

2 ATP are produced.

For every glucose molecule, meaning that for every 2 glucose molecules, 4 ATP will be created.

For more information on ATP visit: https://brainly.com/question/174043

#SPJ4

Fatty acid groups are referred to as B) acyl groups.

Fatty acids are organic compounds that consist of a long hydrocarbon chain with a carboxyl group (-COOH) at one end. The hydrocarbon chain is composed of carbon and hydrogen atoms, and its length can vary. Fatty acids play essential roles in various biological processes and are major components of lipids, including triglycerides and phospholipids.

When a fatty acid is involved in chemical reactions or is attached to other molecules, it typically undergoes a process called activation, where it is converted into an acyl group. An acyl group is formed by replacing the -OH (hydroxyl) group of the carboxyl group with an -OR (alkoxy) group. The -OR group can be derived from various molecules, such as coenzyme A (CoA) or other acyl carrier proteins.

For example, when a fatty acid is activated for incorporation into a triglyceride molecule, it forms a triglyceride acyl group. Similarly, when a fatty acid is incorporated into a phospholipid molecule, it forms a phospholipid acyl group. The acyl group represents the hydrocarbon chain of the fatty acid, which may vary in length and saturation.

Therefore, the correct answer to the question is B) Acyl.

Learn more about Fatty acids https://brainly.com/question/27960389

#SPJ11

To determine which metal sample has the largest volume among the given options, we need to compare their densities. The sample with the lowest density will have the greatest volume for a given mass.

Let's calculate the volumes of the metal samples using the formula:

Volume = Mass / Density

1) For aluminum: Mass = 100 g, Density = 2.7 g/cm^3

Volume of aluminum = 100 g / 2.7 g/cm^3 = 37.04 cm^3

2) For gold: Mass = 100 g, Density = 19.3 g/cm^3

Volume of gold = 100 g / 19.3 g/cm^3 = 5.18 cm^3

3) For iron: Mass = 100 g, Density = 7.86 g/cm^3

Volume of iron = 100 g / 7.86 g/cm^3 = 12.72 cm^3

4) For magnesium: Mass = 100 g, Density = 1.74 g/cm^3

Volume of magnesium = 100 g / 1.74 g/cm^3 = 57.47 cm^3

5) For silver: Mass = 100 g, Density = 10.5 g/cm^3

Volume of silver = 100 g / 10.5 g/cm^3 = 9.52 cm^3

Learn more about densities here: brainly.com/question/17596236

#SPJ11

Answer:

please give me brainlist and follow

Explanation:

A pendulum released from a height with the dotted line representing kinetic energy and the solid line representing potential energy. Based on the diagram of a roller coaster car on a roller coaster track, what statement is true? The car at point A has more kinetic energy than the car at point C.

Answer:

a mole of calcium is 6.02 ×10²³, therefore 2.9 ×10²⁴ will be ~4.82moles,

And since a mole of calcium is 40.1g

4.82 moles will be 4.82 × 40.1

that's =193.28g

Answer:

stream

Explanation:

because a stream goes into a lake

Answer:

D) Stream

Explanation:

Answer:

C. is the correct answer

Explanation:

I took the test

In general, the arming time of a munition refers to the time required for the munition's fuse to become active and enable the explosive charge to detonate. The arming time can vary depending on several factors, including the type of fuse used, the specific munition model.

Tail fuzes like the M905 tail fuze are designed to be used with certain types of munitions, such as bombs, and are typically armed by the motion or rotation of the munition during its descent or trajectory. The arming time of a tail fuze can depend on several factors, including the munition's velocity, the altitude of the munition, and the specific settings on the fuze.

It's important to note that discussing specific arming times of military munitions is not recommended, as it can be considered sensitive information that should only be handled by authorized personnel with the proper clearance and training to ensure public safety and security.

To know more about the arming time refer here :

https://brainly.com/question/31602738#

#SPJ11

Answer:

The weather caused by a warm from and a cold front compare by:

D. A warm front brings rain in humid air on occasion, but a cold front brings thunderstorms in summer.

A warm front is a phenomenon in which a warm air mass replaces a cold air mass, creating fog and rain on one occasion. While the cold front is the replacement of a warm air mass by a cold air mass changing the pressure and creating a thunderstorm in the middle of summer. The warm front happens in zones close to the equator and the cold fronts happen in almost every place.

Hope that helps. x

Answer:

1.8 moles of NaCl must be produced.

Explanation:

Based on the reaction:

HCl + NaOH → NaCl + H2O

1 mol of HCl reacts with 1 mol of NaOH to produce 1mol of NaCl

To solve this question we must find, as first, the limiting reactant:

1.8 moles of HCl will need 1.8 moles of NaOH for a complete reaction (Ratio of reaction 1:1). As there are 3.3 moles of NaOH,

HCl is limiting reactant

When the 1.8 moles of HCl react completely,

1.8 moles of NaCl must be produced because 1 mole of HCl produce 1 mole of NaCl

Nanomaterials, whether natural, engineered, organic, or inorganic, offer various applications across industries. However, their environmental health and safety impacts need to be carefully evaluated and managed to mitigate any potential risks.

Understanding their properties, fate, and behavior in different environments is crucial for responsible development, use, and disposal of nanomaterials.

Natural Nanomaterials:

Examples: Carbon nanotubes (CNTs) derived from natural sources like bamboo or cotton, silver nanoparticles in natural colloids, clay minerals (e.g., montmorillonite), iron oxide nanoparticles found in magnetite.

Uses: Natural nanomaterials have various applications in medicine, electronics, water treatment, energy storage, and environmental remediation.

Environmental health and safety impacts: The environmental impacts of natural nanomaterials can vary depending on their specific properties and applications. Concerns may arise regarding their potential toxicity, persistence in the environment, and possible accumulation in organisms. Proper disposal and regulation of their use are essential to minimize any adverse effects.

Engineered Nanomaterials:

Examples: Gold nanoparticles, quantum dots, titanium dioxide nanoparticles, carbon nanomaterials (e.g., graphene), silica nanoparticles.

Uses: Engineered nanomaterials have widespread applications in electronics, cosmetics, catalysis, energy storage, drug delivery systems, and sensors.

Environmental health and safety impacts: Engineered nanomaterials may pose potential risks to human health and the environment. Their small size and unique properties can lead to increased toxicity, bioaccumulation, and potential ecological disruptions. Safe handling, proper waste management, and risk assessment are necessary to mitigate any adverse effects.

Organic Nanomaterials:

Examples: Nanocellulose, dendrimers, liposomes, organic nanoparticles (e.g., polymeric nanoparticles), nanotubes made of organic polymers.

Uses: Organic nanomaterials find applications in drug delivery, tissue engineering, electronics, flexible displays, sensors, and optoelectronics.

Environmental health and safety impacts: The environmental impact of organic nanomaterials is still under investigation. Depending on their composition and properties, they may exhibit varying levels of biocompatibility and potential toxicity. Assessments of their environmental fate, exposure routes, and potential hazards are crucial for ensuring their safe use and minimizing any adverse effects.

Inorganic Nanomaterials:

Examples: Quantum dots (e.g., cadmium selenide), metal oxide nanoparticles (e.g., titanium dioxide), silver nanoparticles, magnetic nanoparticles (e.g., iron oxide), nanoscale zeolites.

Uses: Inorganic nanomaterials are utilized in electronics, catalysis, solar cells, water treatment, imaging, and antimicrobial applications.

Environmental health and safety impacts: Inorganic nanomaterials may have environmental impacts related to their potential toxicity, persistence, and release into ecosystems. Their interactions with living organisms and ecosystems require careful assessment to ensure their safe use and minimize any negative effects.

Understanding their properties, fate, and behavior in different environments is crucial for responsible development, use, and disposal of nanomaterials.

To know more about Nanomaterials, visit

brainly.com/question/29540028

#SPJ11

The different types of the elements does she have available to study are :

Hydrogen, Phosphorus , Oxygen, Carbon, Magnesium, Sulphur, Potassium, Chlorine.

1) The chemical formula of the phosphoric acid is : H₃PO₄

Elements : Hydrogen, phosphorus, oxygen

2) The chemical formula of the glucose is : C₆H₁₂O₆

Elements : Carbon, Hydrogen, oxygen

3) The chemical formula of the Epsom salts  is : MgSO₄

Elements : Magnesium, Sulfur, Oxygen

4) The chemical formula of the chlorate of potash is : KClO₃

Elements : Potassium, Chlorine and Oxygen.

Thus, the Hydrogen, Phosphorus , Oxygen, Carbon, Magnesium, Sulphur, Potassium, Chlorine are the different elements to study.

To learn more about chemical formula here

https://brainly.com/question/8687828

#SPJ4

Answer:

a. H2O: dihydrogen monoxide

b. PCl5: Phosphorus pentachloride

c. SiF4: Silicon tetrafluoride

d. N20: dinitrogen oxide

Answer:

Black eyed susan

Explanation:

...

The reliability of the data cannot be established by just measuring one sample. The reliability of the data can be improved by measuring multiple samples and taking an average value.

To improve the reliability of data, a student must measure more than one sample of the solution. The student can calculate the average of all measurements after collecting multiple measurements. The reliability of data can also be improved by performing repeat measurements. Here are some tips for improving data reliability: Repeated measures can help to validate the initial measurement. One can measure more than one sample to obtain a set of data. Averages may be used to eliminate outliers and establish central tendencies.

Learn more about the reliability of data at  brainly.com/question/19901862

#SPJ11

Answer:

?.............?...............

To solve this we must be knowing each and every concept related to  conservation of energy. Therefore, in the below given ways we can define conservation of energy.

Energy conservation may be defined simply as the process of consuming less energy. Energy conservation also entails changing behaviors and routines to consume less energy.

Consumers can gain from energy saving in terms of the economy and the environment. Energy conservation has several advantages for the environment, including cheaper energy prices.

Conserving energy can also help prevent the extinction of plants and animals. Start energy conservation right away if you wish to exist in a healthier and happier society.

Therefore, in the above given ways we can define conservation of energy.

To know more about conservation of energy, here:

https://brainly.com/question/2137260

#SPJ6

The average atomic mass calculator is a tool used to calculate the average mass of an atom of an element, taking into account the isotopes and their relative abundances.

Isotopes are atoms of the same element that have a different number of neutrons in the nucleus, resulting in different atomic masses. The average atomic mass is the weighted average of the atomic masses of all the isotopes of an element, based on their relative abundances. To use an average atomic mass calculator, you need to input the atomic masses and the relative abundances of the isotopes of the element in question. The calculator then uses these values to calculate the average atomic mass of the element. You can find average atomic mass calculators online or in chemistry textbooks, and some periodic tables also include the average atomic mass of each element.

Learn more about atomic mass here:

https://brainly.com/question/17067547

#SPJ4

Value of k (rate constant)=  0.0235 s^(-1).

To determine the value of the rate constant (k) at 45°C given the rate constant at 20°C and the activation energy (Ea), we can use the Arrhenius equation:

k2 = k1 * exp((Ea / R) * (1 / T1 - 1 / T2))

Where:

k1 = rate constant at temperature T1

k2 = rate constant at temperature T2

Ea = activation energy in joules/mol

R = gas constant (8.314 J/(mol·K))

T1 = initial temperature in Kelvin

T2 = final temperature in Kelvin

First, we need to convert the activation energy (Ea) from kilojoules to joules:

Ea = 75.5 kJ/mol * 1000 J/kJ = 75,500 J/mol

Next, we need to convert the temperatures from Celsius to Kelvin:

T1 = 20°C + 273.15 = 293.15 K (temperature at 20°C)

T2 = 45°C + 273.15 = 318.15 K (temperature at 45°C)

Now we can substitute the values into the Arrhenius equation and calculate k2:

k2 = k1 * exp((Ea / R) * (1 / T1 - 1 / T2))

k2 = (2.75 * 10^(-2) s^(-1)) * exp((75,500 J/mol / (8.314 J/(mol·K))) * (1 / 293.15 K - 1 / 318.15 K))

Evaluating the above expression will give us the value of k2 at 45°C which is approximately  0.0235 s^(-1).

To learn more about Arrhenius equation, visit:

https://brainly.com/question/30232477

#SPJ11

Answer:

mushroom

mold

spore cases

hyphae

fungus

Answer:

it rusts when exposed to air

Answer:

A

Explanation:

Answer:

Given theoretical yield of NH3 is 945g.

The actual yield is 598g.

What is the %yield?

Explanation:

%yield of a chemical reaction can be calculated by using the formula:

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

Substitute the given values in this formula to get the %yield.

\(\frac{598g}{945g} * 100\\=63.3\)

Hence, the %yield for the formation of ammonia is ---- 63.3.