how many moles of carbon -12 are contained in exactly 6 gram of carbon-12?

Answer:

Explanation:

We need a color key to determine the pH of a solution using pH indicator paper.

pH is the measure of the hydrogen ions concentration in a solution which means the measure of acidity or alkalinity of the solution.

Generally, the pH scale ranges from 0 to 14.

A solution having a pH less than 7 is said to be acidic whereas a solution having a pH more than 7 is considered basic or alkaline

A solution having a pH equal to 7 is said to be neutral

pH indicators are weak acids that are found as natural dyes and that change color to show how many H⁺ (H3O⁺) ions are present in a solution.

The substance you are analyzing has an acidic, basic, or neutral pH value, which is calculated from the negative logarithm of H⁺ concentration.

The paper form of pH indicators is typically dipped into solutions and then removed for comparison against a color/pH key. Usually, the liquid form of pH indicators is added directly to solutions.

Thus, a color key or pH key is needed to determine the pH of a solution using pH indicator paper.

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Answer:

color key

creating a color key

have known PH values

A

Explanation:

hope this helps its all the answers in one

There are approximately 6.022 × 10^23 atoms in 12 grams of Carbon-12 (12C).

The number of atoms in a given amount of a substance can be calculated using Avogadro's number, which represents the number of atoms or molecules in one mole of a substance. Avogadro's number is approximately 6.022 × 10^23.

Carbon-12 is a specific isotope of carbon, with an atomic mass of 12 atomic mass units (amu). One mole of Carbon-12 has a mass of 12 grams. Since one mole of any substance contains Avogadro's number of particles, in the case of Carbon-12, it contains 6.022 × 10^23 atoms.

Therefore, if we have 12 grams of Carbon-12, which is equal to one mole, we can conclude that there are approximately 6.022 × 10^23 atoms in this amount of Carbon-12.

In summary, 12 grams of Carbon-12 contains approximately 6.022 × 10^23 atoms. Avogadro's number allows us to relate the mass of a substance to the number of atoms or molecules it contains, providing a fundamental concept in chemistry and enabling us to quantify and understand the microscopic world of atoms and molecules.

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Answer:

I think that the fire will continue burning, because the oil and water don't mix and the water is heavier (denser) than oil, so the oil will go up and the fire with it. That's why because the gas station have sand instead of water

Water is heavier than oil. Because oil is lighter and immiscible with water, it will form a separate layer above the surface of the water and continue to burn when water is poured on a large oil fire. As a result, the fire won't be put out.

A small amount of water will instantly sink to the bottom of a pan or deep fryer filled with hot, burning oil and explode there. The Scientific American claims that the characteristics of oils explain why they do not mix with water.

Oil or petroleum-related fires cannot be put out with water. Water sinks below the oil because it is heavier than oil and does not float, allowing the fire to continue to burn. Oil and petroleum fires can be put out with fire extinguishers or sand.

The temperature of the burning substance is lowered by water. The fire goes out when the temperature drops below the burning substance's ignition temperature. Here, the water serves as an acclimatizer.

Thus,  it will form a separate layer above the surface of the water and continue to burn when water is poured on a large oil fire.

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Answer:

Br-CH2-CH(CH3)2-C(Cl)H-CH(CH3)2-CHO

Explanation:

The molecule has a total of 14 carbon atoms, 13 hydrogen atoms, and 1 bromine atom. The carbon atoms are arranged in a chain with a methyl group attached to the second carbon atom, a chlorine atom attached to the third carbon atom, and two methyl groups attached to the fourth carbon atom. The fifth carbon atom has a carbonyl group attached to it.

The molecule is an aldehyde, which means that it has a carbonyl group (C=O) at the end of the chain. The carbonyl group is polar, and the oxygen atom has a partial negative charge. The hydrogen atom has a partial positive charge. This polarity makes the aldehyde group susceptible to nucleophilic attack.

The bromine and chlorine atoms are both electrophilic, which means that they have a partial positive charge. This makes them susceptible to nucleophilic attack.

The methyl groups are non-polar and do not have any significant reactivity.

The molecule is a chiral molecule, which means that it has a mirror image that is not superimposable on itself. This is because the carbon atom with the carbonyl group is attached to four different groups.

The molecule is a liquid at room temperature and has a strong odor. It is used in a variety of products, including perfumes, flavorings, and plastics.

Answer:

Molar concentration of potassium hydroxide

= 0.27 Mol liter/approx

The controlled burn cause of wildfires is least likely to lead to catastrophic results. Therefore, option (C) is correct.

A controlled burn is a fire set intentionally for purposes of forest management, prairie restoration, farming, or greenhouse gas. A controlled burn refers to the intentional burning of slash, fuels through burn piles.

Controlled burning can be done during the cooler months to reduce fuel buildup and reduce the likelihood of serious hotter fires. Controlled burning enhances the germination of desirable forest trees, and exposes soil mineral layers which expand seedling vitality.

Controlled burning is also useful in agriculture as it is often referred to as slash and burns. It is one component of shifting cultivation, as a section of field preparation for planting called field burning. This technique is utilized to clear the land of any existing crop residue and kill weeds and weed seeds.

Field burning is less expensive but because it forms smoke and air pollutants, its use is not common in agricultural areas.

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Answer:

A saturated fat is a type of fat in which the fatty acid chains have all or predominantly single bonds. A fat is made of two kinds of smaller molecules: glycerol and fatty acids. Fats are made of long chains of carbon atoms. Some carbon atoms are linked by single bonds and others are linked by double bonds and a type of fat containing a high proportion of fatty acid molecules with at least one double bond, considered to be healthier in the diet than saturated fat.

Explanation:

good luck

The growth of the new plant depicts the asexual reproduction characteristic. The characteristic that describes the growth of the new plant in Stephan's mother cutting a twig from a rose bush and planting it in the soil is asexual reproduction.

Asexual reproduction is the mode of reproduction by which organisms generate offspring that are identical to the parent's without the fusion of gametes. Asexual reproduction is a type of reproduction in which the offspring is produced from a single parent.

The offspring created are clones of the parent plant, meaning they are identical to the parent.The new plant in Stephan’s mother cutting a twig from a rose bush and planting it in the soil depicts the process of asexual reproduction, which is the ability of a plant to reproduce without seeds. In asexual reproduction, plants can reproduce vegetatively by cloning themselves using their roots, bulbs, or stems.

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It is likely that the temperature of the steam is higher than the temperature of the water boiling in the kettle. The intense heat felt by Alka from the puff of steam supports this observation.

In general, the temperature of steam produced from boiling water is higher than the temperature of the water itself. When water boils, it undergoes a phase change from a liquid to a gas, forming steam.

During this phase change, the water absorbs heat energy from the heat source, such as a stove or electric kettle, and converts it into the latent heat of vaporization.

The boiling point of water is 100 degrees Celsius (212 degrees Fahrenheit) at standard atmospheric pressure. At this temperature, the water molecules have enough energy to overcome the intermolecular forces and transition into the gaseous state.

However, steam is hotter than the boiling point of water because it contains additional heat energy in the form of latent heat. The heat energy absorbed during vaporization is stored as latent heat within the steam. As the steam gushes out of the spout of the kettle, it releases this latent heat energy, which can be felt as intense heat.

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Types of energy transformations that may occur in each are heat, light, mechanical to electric, and chemical into heat and light energy.

a. Logs burn in a fire - chemical energy in the wood into heat and light energy.

b. A waterfall turns the turbine to create electricity - mechanical energy into hydroelectric energy.

c. A battery is used to power a flashlight - chemical energy into heat and light energy.

Even with the burning of timber, the chemical electricity within the wood is launched as warm due to the chemical response of wood and oxygen. This form of a chemical reaction is known as combustion and it calls for oxygen. Combustion converts the saved chemical strength inside the wood into heat and light electricity.

The regulation of conservation of power states that the amount of power is neither created nor destroyed. for example, while you roll a toy car down a ramp and it hits a wall, the power is transferred from kinetic power to capability electricity. Hydroelectric strength is additionally called hydroelectric electricity or hydroelectricity.

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Answer: is that a question or

Explanation:

Answer:

its c

Explanation:

Answer:

The light-independent reactions of the Calvin cycle can be organized into three basic stages: fixation, reduction, and regeneration.

Answer:

6 mol CO2

Explanation:

According to the equation, 6 moles of O2 will produce 6 moles of CO2, so the ratio is 1:1

therefore 6 moles of O2 will produce 6 moles of CO2

Answer:

The correct answer is 119.

Explanation:

We are given the bond length of XY is 212.

The covalent radius of Y = 93.

Now this means that the bond length(R) is sum of the radio of X and Y Atom.

So, R(XY)=r(X)+r(Y)

212 = r(X)+93

r(X)= 119.

Therefore, the covalent radius of X is 119.

I hope this helps, have a good day! :D

Bond length is the distance between two bonded atoms. The covalent radius of X in XY molecule with bond length 212 and Y with a covalent radius of 93, is 119.

Covalent radius is the measure of the atomic size bonded with another atom through covalent bond. Covalent bonds are formed between non-metals with comparable electronegativities.

Bond length of molecule is the distance between the two bonded atom. Mathematically bond length of a covalent compound is the sum of covalent radius of the two bonded atoms.

The bond length of the molecule XY is given as 212 and the covalent radius of Y atom is 93. The bond length 212 is the sum of covalent radius of Y and covalent radius of X.

Covalent radius of X =  212 - 93 = 119.

Therefore, covalent radius of X atom in the XY molecule with bond length 212 and Y atom with covalent radius of 93 is 119 thus, option a is correct.

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Answer:

The arrow symbol in a chemical equation separates the reactants from products. A chemical reaction is process in which chemical changes leads to the formation of products from reactants.

Explanation:

Answer:

A B and C

Explanation:

Hopefully this helps

Answer:

i thing its b

Explanation:

The acid dissociation constant (Ka) is a measure of the strength of an acid in solution. In HNO₃ (nitric acid), the given Ka value is 4.0 x 10⁴. It represents the equilibrium constant for the dissociation reaction of an acid in water. Therefore, option B is correct.

The dissociation constant often denoted as Kd, is a measure of the strength of the interaction between a ligand and a receptor or between a substrate and an enzyme.

A high Ka value indicates a strong acid, while a low Ka value indicates a weak acid. In this case, the Ka value of 4.0 x 10⁴ for HNO₃ is relatively high.

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Answer:3

Explanation:

9. The number of mole of the argon contained in the tank is 2.39 moles

10. The volume (in liters) of H₂O produced from the reaction is 73.5 liters

The number of mole of the argon contained in the tank can be obtained as follow:

PV = nRT

Inputting the given parameters, we have:

9.4 × 6.25 = n × 0.0821 × 299

Divide both sides by (0.0821 × 299)

n = (9.4 × 6.25) / (0.0821 × 299)

n = 2.39 moles

Thus, the number of mole of the argon gas in the tank is 2.39 moles

The volume of H₂O produced can be obtained as shown below:

4NH₃(g) + 5O₂(g) -> 6H₂O(g) + 4NO(g)

From the balanced equation above,

4 liters of NH₃ reacted to produced 6 liters of H₂O

Therefore,

49 liters of NH₃ will react to produce = (49 × 6) / 4 = 73.5 liters of H₂O

Thus, the volume of H₂O produced is 73.5 liters

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The amount of heat energy absorbed when 200 grams of water are heated from 20 C to 60 C is 33,440 Joules.

To find the amount of heat energy absorbed when 200 grams of water are heated from 20 C to 60 C, we can use the equation Q = mcAT.
First, we need to find the value of m, which is the mass of the water in grams. In this case, it is given as 200 grams.
Next, we need to find the value of AT, which is the change in temperature in degrees Celsius.

This can be calculated by subtracting the initial temperature from the final temperature, which gives us 60 C - 20 C = 40 C.
The specific heat capacity of water, C, is given as 4.18 Joules per gram per degree Celsius.
Now we can plug in the values into the equation:
Q = mcAT
Q = (200 g) x (4.18 J/g°C) x (40°C)
Q = 33,440 J
Therefore, the amount of heat energy absorbed when 200 grams of water are heated from 20 C to 60 C is 33,440 Joules.

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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:

6.9 kg

Explanation:

hope it help sir

Answer:

6.9kg

Explanation:

Decigram [dg] Kilogram [kg]

1 dg                          0.0001 kg

So 1 dg = 0.0001 kg

Hence, 0.0001 x 69,000

=

6.9

Therefore 69,000 dg = 6.9 kg

Answer:

310K

Explanation:

Rearrange PV=nRT to get T=PV/nR

T=(2.0L)(0.75atm)/(0.5mol)(0.08206)

=36.5 or 37

add 273 for K to get

310

Answer:

active transport requires energy and passive transport does not require energy

Explanation:

Answer:THE SIMPLE ANSWER JUST SAY IT ITS B
IT REQUIRES ENERGY

PLS MAKE ME BRAINLIEST I NEED AWARD

Explanation:

The data the students could collect to confirm the type of reaction is the temperature before and after the reaction.

The system is the reaction vessel and the surroundings are the laboratory environment.

Chemical reactions are reactions in which new substances called products are formed from one or more substances that undergo chemical change called reactants.

During a chemical reaction, heat changes occur as the reactants form products. The heat changes that occur may involve the release of heat by the chemical system to the surroundings or the absorption of heat from the surrounding by the chemical system.

A reaction in which heat is absorbed will feel cold to touch and is called an endothermic reaction.

A reaction in which heat is released to the surroundings will feel hot to touch and is called an exothermic reaction.

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