Guide Questions. 1.) What is the color of the Freshly cut apple/eggplant/potato in glass A and glass B? 2.) What is the color of the apple/ eggplant/potato After 48 hours in glass A and glass B? 3) What is the effect of the exposing the slice of the material in oxygen in glass A and glass B after 48 hours? 4) What is the effect of puting an Vitamin C (as antioxidant that prevents Further oxidantion of apple /eggplant in Glass B?​

Answer:

the molar mass of Mg(NO3)2

the mass of the water added the density of the Mg(NO3)2

the volume of water used

Calculate the number of moles of Mg(NO3)2 used to make up this solution. 42.0 g of Mg(NO3)2 is equivalent to___ mol Mg(NO3)2.

Now calculate the molarity of the solution, giving your answer to the correct number of significant digits.

Molarity of Mg(NO3)2 = ___M

Answer :

Dipole moments occur when there is a separation of charge. Dipole moments occur due to atoms electronegativity, where one atom has the ability to attract electrons towards it giving it a negative charge and the one deficient in electrons acquire a positive charge called as the bond moment.

But if the bond moments are equal and opposite in direction , they cancel each other and thus there is no net dipole moment in the molecule.

For example: In carbon dioxide , both the -C=O bonds are polar but as the molecule is linear and the the magnetic moments are equal and oppposite, they cancel each other and the molecule is non polar.

Answer:

The Avogadro number

One mole of atoms contains 6 x 10 23 atoms, no matter what element it is

Explanation:

If a snail crawls 55 inches per day ,the snail will crawl approximately \(3.2 * 10^3 centimeters.\)

To convert inches to centimeters, we need to use the conversion factor: 1 inch = 2.54 centimeters.

First, let's calculate the distance the snail crawls in inches in 23 days. We can multiply the daily distance by the number of days:

Distance in inches = 55 inches/day × 23 days = 1265 inches.

Now, to convert the distance from inches to centimeters, we multiply the distance in inches by the conversion factor:

Distance in centimeters = 1265 inches × 2.54 cm/inch = 3215.1 cm.

Rounding to the appropriate number of significant figures, the snail will crawl approximately 3215 cm or \(3.2 * 10^3 centimeters.\) in 23 days.

Therefore, the answer is  Option 3:\(3.2 * 10^3 centimeters.\)

This means that in 23 days, the snail will crawl approximately\(3.2 * 10^3 centimeters.\)

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The mass of hydrogen needed to produce 51.0 grams of ammonia is  ≈ 9.07 grams.

To determine the mass of hydrogen required to produce 51.0 grams of ammonia (NH3) using the Haber process, we need to calculate the stoichiometric ratio between hydrogen and ammonia.

From the balanced chemical equation:

3 H₂(g) + N₂(g) → 2 NH₃(g)

We can see that for every 3 moles of hydrogen (H₂), we obtain 2 moles of ammonia (NH₃).

First, we need to convert the given mass of ammonia (51.0 grams) to moles. The molar mass of NH₃ is 17.03 g/mol.

Number of moles of NH₃ = Mass / Molar mass

                     = 51.0 g / 17.03 g/mol

                     ≈ 2.995 moles

Next, using the stoichiometric ratio, we can calculate the moles of hydrogen required.

Moles of H₂ = (Moles of NH₃ × Coefficient of H₂) / Coefficient of NH₃

           = (2.995 moles × 3) / 2

           ≈ 4.493 moles

Finally, we can convert the moles of hydrogen to mass using the molar mass of hydrogen (2.02 g/mol).

Mass of H₂ = Moles × Molar mass

          = 4.493 moles × 2.02 g/mol

          ≈ 9.07 grams

Therefore, approximately 9.07 grams of hydrogen is needed to produce 51.0 grams of ammonia in the Haber process.

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Answer:

a. Aqueous

Explanation:

Took the test

Hamilton explained the choice on the On Purpose show, admitting that the pair's work connection from karting to F1 had placed a burden on an otherwise strong friendship.

Lewis Hamilton now has a close connection with his father Anthony, but this was not always the case during his Formula One tenure. Anthony had a significant influence on his son's career, notably working multiple jobs to finance Hamilton's early foray into racing until he was signed by McLaren at the age of 11.

However, his earnings outside of Formula One rose from $8 million in 2021 to $12 million in 2022. Hamilton was the highest-paid Formula One racer. He has profitable agreements with companies such as Monster energy drinks.

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The number of times phosphorous is greater in not visible in the data

The steps involved for calculating the times the change in phosphorus level are :

First step: Determine the difference between Phosphorus levels in 1965 and 1975

Second step: Determine the difference between Phosphorus levels in 2008 and 2014

Last step: Determine the quotient by dividing first step by second step

Hence can conclude that The number of times phosphorous is greater in not visible in the data.

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Attached below is the missing Image related to your question

Answer:

Explanation:

We can solve this using Gay Lussac's law which states that the pressure of a given mass of gas is directly proportional to it's temperature in kelvin. This law can be illustrated using the formula below

P₁/T₁ = P₂/T₂

where P₁ = 101.3 kPa

P₂ = 191.0 kPa

T₁ = 373.15K

T₂ = ?

101.3/373.15 = 191/T₂

cross-multiply

T₂ = 373.15 x 191/101.3

T₂ = 703.57K

The temperature of the steam inside the pressure cooker is 703.57K

The temperature is  703.6 K.

The pressure of a given mass of gas is directly proportional to its  temperature at constant volume.

P1 = 101.3 kPa

P2 = 191.0 kPa

T1 = 373.15K

T2 = ?

Now;

P1/T1 = P2/T2

P1T2 = P2T1

T2 = P2T1/P1

T2 = 191.0 kPa × 373.15K/101.3 kPa

T2 = 703.6 K

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We're given the [OH⁻] as 8.34 × 10⁻¹² M. Using the formula pOH = -log[OH⁻], the pOH of this solution would be -log(8.34 × 10⁻¹²) ≈ 11.08.

The pOH is, for lack of a better term, the "opposite" of pH: A pOH of 7 is neutral; a pOH less than 7 is basic; and a pOH greater than 7 is acidic.

This follows from the relation, pH + pOH = 14. In this case, with a pOH of 11.08, our pH would be 14 - 11.08 = 2.92, which is acidic (pH < 7).

Thus, the correct answer choice is B.

By using filtration, the sand and fine salt can be effectively separated based on their difference in particle size, providing a clean separation of the two components.

Filtration is a separation technique that takes advantage of the difference in particle size between sand and salt. It involves passing the mixture through a porous material, such as filter paper or a filter funnel, which allows the liquid (saltwater) and small salt particles to pass through while retaining the larger sand particles.

Here's how the filtration process can be carried out:

1. Set up a filter apparatus with a funnel and filter paper or a filter flask.

2. Place the mixture of sand and salt in a beaker or a flask.

3. Slowly pour the mixture into the filter paper or funnel, allowing the liquid (saltwater) to pass through while retaining the sand on the filter paper.

4. Once the liquid has passed through completely, the sand will be left behind on the filter paper or in the filter flask.

5. Carefully remove the sand from the filter paper or filter flask, and the saltwater solution can be collected separately.

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The Net force which is acting on the object is 20.12 N and the direction (θ) of the net force is 26.56° towards the South of East. The net force is a resultant of both the forces.

Th net force is the vector sum of all the forces which are acting on a particle or object. The force on the object in the diagram is given below as follows:

Force 1, F₁ = 18 N (force acting in a direction to the east)

Force 2, F₂ = 9 N (force acting in a direction south)

The two forces makes the two sides of a right-angled triangle in the diagram:

Net force can be determined using Pythagoras rule as follows:

Net force, F = √[(F₁)² + (F₂)²]

Net force = √ [(18)² + (9)²]

Net force = √ (324 + 81)

Net force = √ 405

Net force = 20.12 N

The direction of the Net force (θ) is determined as follows:

θ = tan⁻¹ (9 / 18)

θ = tan⁻¹ (0.5)

θ = 26.56° towards South of East

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The functional group in alcohol is a hydroxyl group (-OH), in phenol, it is a hydroxyl group attached to a benzene ring, and in ether, it is an oxygen atom (-O-) between two alkyl or aryl groups.

Given that the question asks to identify each of the following compounds as an alcohol, a phenol, or an ether. The question seems to be incomplete as there are no options or compounds mentioned. However, given below is a general explanation of the three compounds -Alcohol: Alcohol is a compound that contains a hydroxyl functional group (-OH) that is attached to a carbon atom. The hydroxyl group in alcohol makes it polar and thus, able to form hydrogen bonds. Alcohol is used as a solvent, fuel, and disinfectant. Phenol: Phenol is an aromatic compound that contains a hydroxyl group (-OH) attached to a benzene ring. It is used in the production of detergents, plastics, and pharmaceuticals. Phenol is used as a disinfectant and anesthetic. Ether: Ether is an organic compound that contains an oxygen atom between two alkyl or aryl groups. It is a colorless, volatile, and highly flammable liquid that is used as a solvent and as a starting material in the synthesis of organic compounds. To identify a compound as an alcohol, phenol, or ether, we need to examine the functional groups in the molecule.

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The Correct choice is ~ A

Respiration provides oxygen needed to release energy.

Answer:

propene

Explanation:

According to the rules,the name of hydrocarbon:root word+suffix=prop+ene=propene

In Atlanta, GA, certain seasons are associated with poorer air quality due to various factors such as weather conditions, human activities, and geographical location.

Typically, the seasons with the worst AQI in Atlanta, GA, are summer and early fall. This is primarily due to the combination of high temperatures, stagnant air masses, and increased pollution from various sources.

During the summer months, Atlanta experiences hot and humid weather, which can contribute to the formation of ground-level ozone. Ozone is a harmful pollutant that is created when pollutants from vehicles, power plants, and industrial activities react with sunlight and heat. High levels of ozone can cause respiratory issues and other health problems.

In addition to ozone, Atlanta also experiences increased levels of particulate matter (PM) during the summer and early fall. PM refers to tiny particles suspended in the air, which can come from sources such as vehicle exhaust, industrial emissions, and wildfires.

These particles can be inhaled into the lungs and can have detrimental effects on respiratory health.

It's important to note that air quality can vary from year to year and is influenced by various factors. Local regulations, weather patterns, and changes in pollutant emissions can all impact the AQI during different seasons.

Monitoring air quality reports and taking necessary precautions such as reducing outdoor activities during times of poor air quality can help individuals stay informed and protect their health.

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Answer:

How do amoeba respire.

Define Diffusion.

Answer:

Latitude

ocean currents

Wind

Elevation

Water

Answer:

See explanation

Explanation:

Given Einstein's theory of relativity, we have that;

E= mc^2

m= mass of the substance

c= speed of light

For one gram of the substance,

E= 1 ×10^-3 × (3 × 10^8)^2

E = 9 × 10^13 J

For 8.7 g of matter;

E = 8.7 × 10^-3× (3 × 10^8)

E= 7.83 ×10^ 14 J

This is the decomposition of silver bromide

Silver bromide decomposes to give silver and bromine

Sunlight is the decomposing agent .

Answer:

Sunlight

Explanation:

Answer:

+ Triple covalent bond (CB) > double CB > single CB in terms of bond strength and energy needed to break the bonds

+ Triple bonds are the most reactive, double bonds are reactive but single bonds are unreactive

+ Single bond > double bond > triple bond in bond length

+ in single bond, 2 electrons are shared
+ in double bond, 4 electrons are shared
+ in triple bond, 6 electrons are shared

Answer:

Sigma bonds: 10

Pi bonds: 4

Explanation:

The compound described must be CH2=CH-CO-CH≡CH. If we look at the compound closely, we will notice that there are 10 sigma bonds and 4 pi bonds.

There are three pi bonds between carbon atoms and one pi bond between a carbon and an oxygen atom (C=O). All these can easily be seen in the structure of the formula chosen in this answer.

The total number of sigma bonds in the given structure are 9. The total number of pi bonds in the given structure are 4.

The given hydrocarbon has the structure of:

\(\rm CH_2=CH-C(=O)-C\equiv CH\).

The pie bonds are the unsaturated bonds, formed by the electron clouds. The double and triple bonds are pi bonds.

In the given structure number of pi bonds are:

Thus the total number of pi bonds in the given structure are 4.

The sigma bonds are the covalent bonds, formed by the sharing of electrons. The single bonds are sigma bonds.

The number of sigma bonds are;

Thus the total number of sigma bonds in the given structure are 9.

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Answer:

C. Oxygen

Explanation:

Oxygen has 8 electrons and doesn't react with fluorine noble gases

Answer:

Carbon monoxide + hydrogen ------> methanol

Explanation:

In writing a chemical equation, the substances which react together to form other substances are known as products and are usually placed on the left side of a the equation, whereas the substances that are formed by the reactants are known as products and are usually written on the right side of the equation. A forward pointing arrow is usually placed between the reactants and and products to show how the reaction proceeds from reactants to formation of products.

From the given equation, methanol is the product formed from the reactants carbon monoxide and hydrogen. Therefore, the equation will be:

carbon monoxide + hydrogen -----> methanol

Answer:

C

Explanation:

For my lazy bretheren

Answer:

If there are more products than reactants, that means the reaction has shifted towards the left, which is the backward direction. If there are more reactants than products, that means the reaction has shifted towards the right, which is the forward direction.

Answer:

You'll be left with 0.25 g of phosphorus-32. The nuclear half-life of a radioactive isotope expresses the time needed for a sample of that isotope to reach half of its initial value. In your case, regardless with how much phosphorus-32 you start with, you'll be left with half of that initial mass after 14.0 days.

Explanation: