Question 8 of 10 Which of the following best describes a balanced reaction?O A. A reaction that has the same number and type of atoms on each side of the equation O B. A reaction that has the same number of molecules on each side of the equation O C. A reaction that has the same number of atoms on each side of the equation O D. A reaction that has the same type of atoms on each side of the equation

To solve this we must be knowing each and every concept related to hydrocarbon. Therefore, the correct option is option A among all the given options.

Since they are the most basic organic molecules, hydrocarbons are extensively researched in organic chemistry. They are organic compounds that simply include carbon and hydrogen atoms.

Methane and propane are examples of gaseous hydrocarbons, hexane and benzene are examples of liquid hydrocarbons, paraffin wax or naphthalene are examples of low melting point solids or waxes, while polymeric chain of hydrocarbons including polystyrene, polypropylene, and polyethylene. Many hydrocarbons are sugars.

Therefore, the correct option is option A.

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Answer:

Two positive aspects of using methane recapture systems are able to generate significant electricity. Another benefit is that the process of anaerobic digestion creates heat that can be used to warm buildings where animals are kept

Answer:  The correct answer is;

Two positive aspects of using methane recapture systems include lowering the impact on greenhouse gasses and the production of energy. Methane is a very potent greenhouse gas that is contributing to global warming. As a result, the recapturing process reduces the methane impacts of global warming by reclaiming and reusing the gas for other purposes. Recaptured methane can be stored and used to generate electricity or used as fuel to power updated vehicles and other engines on the farm. The overall benefits from this combination are reducing impacts causing global warming and lower the cost of electricity or fuel on the farm.

Explanation:  This answer has been confirmed correct.

Answer:

n = 3.25 mol

Explanation:

Given data:

Pressure of sample = 2 atm

Volume of sample = 40 L

Temperature = 300 K

Number of moles = ?

Solution:

PV = nRT

R = general gas constant = 0.0821 atm.L/mol.K

2 atm ×40 L = n × 0.0821 atm.L/mol.K × 300 K

80 atm.L = n  × 24.63 atm.L/mol

n = 80 atm.L  /24.63 atm.L/mol

n = 3.25 mol

the field of science which would mostly research is chemistry.

Substituting the given values, we have (0.5 L) / (220 + 273.15 K) = V₂ / (313.15 K).Solving for V₂, we get V₂ = (0.5 L) * (313.15 K) / (220 + 273.15 K).

Calculating this expression, the volume of the balloon when fully cooled by your refrigerator would be approximately 0.38 liters when rounded to two decimal places.To convert Celsius to Kelvin, we need to add 273.15 to the Celsius temperature. Therefore, the temperature inside your refrigerator of 40 degrees Celsius is equivalent to 313.15 Kelvin.Now, let's consider the ideal gas law, which states that PV = nRT, where P is the pressure, V is the volume, n is the number of moles, R is the gas constant, and T is the temperature in Kelvin.Since the number of moles and pressure remain constant, we can write  the equation as V₁/T₁ = V₂/T₂, where V₁ is the initial volume of the balloon, T₁ is the initial temperature, V₂ is the final volume, and T₂ is the final temperature.

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Answer:

5 valence electron

Explanation:

It is because the group number is equal to the valence electron.

Answer:

Oppositely charged particles attract each other. This attractive force is often referred to as an electrostatic force. An ionic bond is the electrostatic force that holds ions together in an ionic compound.

Explanation:

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Answer: Carbon dioxide

Explanation: Hoped that helped!

a)Fe serves as the cathode while Zn serves as the anode. b)Ag is the cathode, and Sn is the anode. c) Zn is the anode and Cu is the cathode.

d) Al is the cathode and Sn is the anode.

An electrical device with polarisation has an electrode called an anode through which regular current flows. The cathode, an electrode of the device through which regular current exits the device, is in contrast to this. For "anode current into the device," the acronym ACID is frequently used. Since electrons move in the opposite direction to conventional current, which is the flow of positive charges in a circuit, (negatively charged) electrons flow out of a galvanic cell's anode and into an external circuit that is linked to the cell. For instance, the anode is located at the end of a household battery that is marked with a "-" (minus).

In both galvanic and electrolytic cells, the oxidation reaction takes place at the anode electrode.

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Answer: B is correct.

Explanation:

Answer A is a chemical change because of intense changes of color and expansion.

Answer C is a chemical change, as hydrogen and water are chemically bonding together.

Answer D is a chemical change because oxidation involves loss of electrons during a chemical reaction.

On the other hand, melting is a physical change. Therefore, answer B is the correct answer.

The de Broglie wavelength of the neutron moving at a velocity of 7.11×10⁶ m/s is 5.56×10¯¹⁴ m

λ = h /mv

Where

The following data were obtained from the question:

The de Broglie wavelength can be obtained as follow:

λ = h /mv

λ = 6.626×10¯³⁴ / (1.676×10⁻²⁷ × 7.11×10⁶)

λ = 5.56×10¯¹⁴ m

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Answer:

1455360 liters

Explanation:

If there are 3.79 liters in 1 gallon

Do 384,000 × 3.79

Which is 1455360

Answer:

100 / 500

Explanation:

100 / 500 is equivalent to 1 / 5.

Answer: you would have to remove 80 calories from 1 g of pure water at the freezing point, 0˚ C, to convert it to 1 g of ice at 0˚ C.                                              Explanation:However, 540 calories of energy are required to convert that 1 g of water at 100˚ C to 1 g of water vapor at 100˚ C. This is called the latent heat of vaporization. On the other hand, you would have to remove 80 calories from 1 g of pure water at the freezing point, 0˚ C, to convert it to 1 g of ice at 0˚ C.

For this question we are going to use Gay-Lussac's Law, which is an experimental gas law that shows the relationship between temperature and pressure in a gas. The formula is:

P1/T1 = P2/T2

We have:

P1 = 97 kPa

T1 = 308 K, we need to use Kelvin

P2 = ?

T2 = 348 K

Now we add these values into the formula:

97/308 = P2/348

0.315 = P2/348

P2 = 109.6 kPa, this will be new pressure

Answer:

0.02kg

Explanation:

Given parameters:

Amount of heat  = 5200J

Unknown:

Mass of ice that would be melted at 0°C = ?

Solution:

To solve this problem, use the expression below;

        H  = mL

H is the heat

m is the mass

L is the latent heat of fusion of ice  =  3.33 x 10⁵ J/kg.

 Insert the parameters and solve for m;

           5200  = m x 3.3 x 10⁵

             m  = \(\frac{5200}{3.33 x 10^{5} }\)   = 0.02kg

The cobalt is the anode and the lead is the cathode

A salt bridge is a component of a galvanic cell that connects the two half-cells and allows the transfer of ions between them. Second, the salt bridge helps to maintain the charge balance in the two half-cells.  

A galvanic cell, also known as a voltaic cell, is a device that converts chemical energy into electrical energy.

It consists of two half-cells that are connected by a salt bridge or a porous barrier, which allows for the transfer of ions between the two solutions without mixing them. Each half-cell consists of an electrode and an electrolyte solution.

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Answer: Booting up the computer: When you turn on the computer, it requires a burst of energy to start up the various components and initialize the operating system.

Explanation:

Answer:

2. Na1 +

Explanation:

The formular for sodium fluoride is; NaF

The metal in sodium flouride is sodium.

Sodium belongs to group 1, hence would lose one electron when forming ions.

This is represented as;

Na+

If an acid has a Ka of 4.3 × 10-⁷ and a base has a Kb of 5.6 × 10-⁴, then the true statement about the salt produced is that the salt would decrease the pH of the solution.

An acid dissociation constant, Kₐ, is a quantitative measure of the strength of an acid in solution while Kb indicates the high level of dissociation of a strong base.

According to this question, an acid has a Ka of 4.3 × 10-⁷ and a base has a Kb of 5.6 × 10-⁴. This shows that the strength of the base is higher than that of the acid.

Therefore, if an acid has a Ka of 4.3 × 10-⁷ and a base has a Kb of 5.6 × 10-⁴, then the true statement about the salt produced is that the salt would decrease the pH of the solution.

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Answer:

5230 J

Explanation:

m = 25 g = 0,025 kg

c = 4,184 J /(g * °C) = 4184 J /(kg * °C)

\(t_{1}\) = 80 °C

\(t_{2}\) = 30 °C

The formula is Q = c *m * (\(t_{2} - t_{1}\))

Calculating:

Q = 4184 * 0,025 * (30 - 80) = 5230 J

Note that we get a negative heat (-5230 J). It just means that it is released.

The amount of heat will be 5230 j.

What is heat?

Heat is a type of energy that is transferred between both the system and its surroundings as a result of temperature variations.

Calculation of heat.

Given data:

Mass = 25.0 g = 0.025 kg

C = 4.184 J/g°C

\(T_{1}\) =  80.0°C

\(T_{2}\) = 30.0°C

Q= ?

By using the formula of heat.

Q = MC (\(T_{2} - T_{1}\))

Put the value of given data in heat equation.

Q(heat)  = 0.025  × 4.184  ( 30 - 80)

Q(heat) = 5230 J.

Therefore, the amount of heat will be 5230 J.

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Answer:

D)

Explanation:

A tendon is a fibrous connective tissue that attaches muscle to bone. Tendons may also attach muscles to structures such as the eyeball

Answer:

750g of Aluminum

Assuming 8.6 cm lenth is the height of the cylinder. The volume of a cylinder is: V = \(\pi\)*r^2*h

V = 3.14cm x 10.24cm x 3.6cm

V = 280cm^3

Now density = mass/volume

2.7g/cm^3 = mass/280cm^3

2.7g/cm^3 x 280cm^3 = mass/280cm^3 x 280cm^3

= 750g of Aluminum

Answer:

0.006342moles

Explanation:

1000ml of NaOH contain 0.151moles

42ml of NaOH contain (42*0.151)/1000 moles

=0.006342moles

Answer:

A. Nucleic Acids

Explanation:

This is because the nucleotides combine with each other to form a polynucleotide know as DNA or RNA.

Complete question :

Use the equation qliquid = m × c × ΔT to calculate the heat gained by the cold liquid. Use the specific heat for the liquid you selected.

m = 248.9 g ; T = 72.6°C ; C = 3.73 j/g°C

Use the equation qwater = m × c × ΔT to calculate the heat lost by the hot water. Show your work using the problem-solving method shown in previous rubrics.

M = 237 g ; T = 41.2°C ; C = 4.184 j/g°C

Answer:

Quantity of heat gained = 67401.6 Joules

Quantity of heat lost by hot water = 40854.25 Joules

Explanation:

The heat gained by cold liquid :

Q = m × c × ΔT

m = 248.9 g ; T = 72.6°C ; C = 3.73 j/g°C

Q = 248.9 * 3.73 * 72.6

Q = 67401.6 Joules

Quantity of heat gained = 67401.6 Joules

Heat lost by hot water :

m × c × ΔT

M = 237 g ; T = 41.2°C ; C = 4.184 j/g°C

Q = 237 * 41.2 * 4.184

Q = 40854.25 Joules

Quantity of heat lost by hot water = 40854.25 Joules

Answer:

Example of ionic bonds— Sodium chloride and calcium oxide. Example of covalent bond— Water, carbon

Explanation:

ionic bond, also called electrovalent bond, type of linkage formed from the electrostatic attraction between oppositely charged ions in a chemical compound. Such a bond forms when the valence (outermost) electrons of one atom are transferred permanently to another atom.

A covalent bond consists of the mutual sharing of one or more pairs of electrons between two atoms. These electrons are simultaneously attracted by the two atomic nuclei. A covalent bond forms when the difference between the electronegativities of two atoms is too small for an electron transfer to occur to form ions.

The completed sentence is given as follows:

As more solvent is added, more dissolves. As some of the solute particles collide with the solid surface, it rejoins the solid crystal.

When maximum solubility is reached, particles are returning to the solid form at the same rate at which they are going into the solution.

Saltwater: Salt: Solvent
Water: Solute

Saltwater- Mixture - Uniform - but, no definite shape. Salt dissolves in water. Salt is best described as a solute.
Soluble: Dissolving

Aqueous Solutions: solutions in which water is the solvent. Water: the universal solvent.

Water is known as the "universal solvent" because it dissolves more compounds than any other liquid. This is critical for all living things on the planet.

It implies that water transports vital chemicals, minerals, and nutrients everywhere it travels, whether through the air, the earth, or our bodies.

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Human activities are responsible for almost all of the increase in greenhouse gases in the atmosphere over the last 150 years. The largest source of greenhouse gas emissions from human activities in the United States is from burning fossil fuels for electricity, heat, and transportation.