What part of the plant absorbs the most sunlight to use for making glucose?

Question 6 options:

a.Roots


b.Stem


c.Seed


d.Leaves

Answer:

12.

Explanation:

Beryllium is in Group 2 (Column 2) with the atomic number 4.

The atomic number to the next element in the group would be right below it, Magnesium (Mg). Magnesium has an atomic number 12.

The atomic number is the small number on the top left corner of the square of the element.

Answer: During a phase change, such as melting or boiling, the kinetic energy increases.

Explanation:

Kinetic energy is the energy obtained by the molecules of a substance due to their motion.

When phase change such as melting or boiling takes place then it means heat is absorbed by the substance. As a result, their molecules more even more rapidly from one place to another due to which more number of collisions take place.

Hence, a change in phase of substance occurs as kinetic energy increases in melting or boiling process.

Thus, we can conclude that during a phase change, such as melting or boiling, the kinetic energy increases.

The chemical equation below shows the reaction of sodium (Na) and chlorine (Cl) to form sodium chloride (NaCl).

2Na + Cl₂ ---->   2NaCl,     NaCl formed is an ionic compound.

Sodium is a metal and have tendency to donate an electron and form Na⁺ .The chlorine is a non metal and have tendency to accept electron and form Cl⁻ ion. The positively charged Na⁺  ion and negatively charged Cl⁻ ion form ionic bond . An ionic bond is formed by the complete transfer of electrons. The product is form is NaCl , sodium chloride.

Thus, The chemical equation below shows the reaction of sodium (Na) and chlorine (Cl) to form sodium chloride (NaCl).

2Na + Cl₂ ---->   2NaCl,     NaCl formed is an ionic compound.

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Answer:

0.694 cents per second

Explanation:

25x100=2500 cents per hour, 2500/60 = 41.67 per minute and 41.67/60=0.694 cents per second

Protons (H⁺) are pumped across the inner mitochondrial membrane as part of the process called electron transport chain, which is an essential step in cellular respiration.

The electron transport chain is responsible for generating adenosine triphosphate (ATP), the main energy currency of cells.

During cellular respiration, electrons are transferred from high-energy molecules (such as glucose) through a series of electron carriers embedded in the inner mitochondrial membrane. As electrons pass through the electron transport chain, energy is released and used to pump protons (H⁺) from the mitochondrial matrix to the intermembrane space.

There are some several reasons;

Establishing an Electrochemical Gradient; The pumping of protons across the inner mitochondrial membrane creates an imbalance of protons, resulting in a higher concentration of protons in the intermembrane space compared to the matrix.

Generation of ATP; The electrochemical gradient created by the proton pumping is utilized by ATP synthase, an enzyme complex embedded in the inner mitochondrial membrane.

Coupling Electron Transport with Proton Pumping; The pumping of protons across the inner mitochondrial membrane is coupled with the flow of electrons through the electron transport chain.

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Answer:

C₂H6

Explanation:

Among the given options, the formula A) C₂H6 represents a hydrocarbon (specifically, ethane). Option A

A hydrocarbon is a compound that consists of only carbon and hydrogen atoms. It is important to identify the formula that represents a hydrocarbon among the given options:

A) C₂H6: This formula represents ethane, which is a hydrocarbon. Ethane consists of two carbon atoms bonded together with single bonds and six hydrogen atoms.

B) C₂H5OH: This formula represents ethanol, which is not a hydrocarbon. Ethanol contains a hydroxyl group (-OH), indicating the presence of oxygen in addition to carbon and hydrogen atoms. It is an alcohol, not a hydrocarbon.

C) C₂H5Cl: This formula represents ethyl chloride, which is not a hydrocarbon. Ethyl chloride contains a chlorine atom (Cl) in addition to carbon and hydrogen atoms. It is a haloalkane, not a hydrocarbon.

D) C₂H6O: This formula represents ethanol, which, as mentioned before, is not a hydrocarbon. Ethanol contains an oxygen atom (O) in addition to carbon and hydrogen atoms. It is an alcohol, not a hydrocarbon.

Among the given options, the formula A) C₂H6 represents a hydrocarbon (specifically, ethane). It consists only of carbon and hydrogen atoms, making it a suitable representation of a hydrocarbon.

In summary, the formula C₂H6 (option A) represents a hydrocarbon, while the other options contain additional elements (oxygen or chlorine) that make them non-hydrocarbon compounds. Option A

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Answer:

question 6: winter solstice

question 7: rotation is when an object spins around its axis, revolution is when an object travels in a path around another

question 8: the rotational period is equal to the period of revolution for the moon

question 10: true

Answer:

Question 6:  winter solstice

Question 7: rotation is when an object spins around its axis,

revolution is when an object travels in a path around another

Question 8: the rotational period is equal to the period of revolution for the moon

Question 10: true

Explanation:

I took the test its right

Gaseous products emerge from solid-liquid exothermic chemical reactions. Spontaneous reaction.

Exothermic reactions emit heat. Exothermic reactions release heat, light, or sound. Paper burning is exothermic. Paper burning produces heat and light.

Delta G is negative for spontaneous reactions. Negative delta G suggests spontaneous reaction. Delta G determines whether the reaction goes left or right. Delta G = 0 indicates equilibrium.The reaction in question releases heat, making it exothermic. The reaction is spontaneous. Gaseous products imply a response. This reaction is spontaneous.

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Answer:

N3-

Explanation:

Answer:

baning and stuff XD

Explanation:

Answer: regulation of breathing

Ability to sense pain

Regulation of circulatory system

Explanation:

Answer:

A. all other bulbs will no longer work

HCFCs are considered to be the least damaging to the stratospheric ozone layer among the given options. The correct option is D.

HCFCs are considered to be the least damaging to the stratospheric ozone layer. In comparison to their predecessors, HFCs have a negligible impact on ozone depletion. For instance, trichlorofluoromethane, or CFC-11, a no longer in use coolant, depletes the ozone 400 times more quickly per mass than HFCs do.

Chlorofluorocarbons (CFC) and hydrochlorofluorocarbons (HCFC) have been replaced with HFCs in freezers as well as in home and automotive air conditioners. The ozone hole over Antarctica, which persists today, and other ozone depletion originally noticed by scientists in the 1980s were primarily caused by CFCs. Each chlorine atom found in CFC molecules has the power to obliterate thousands of ozone molecules.

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According to molar concentration, 30 ml of water  should be added to 15 ml of 12 M HCl  to make it to 6 M solution.

Molar concentration is defined as a measure by which concentration of chemical substances present in a solution are determined. It is defined in particular reference to solute concentration in a solution . Most commonly used unit for molar concentration is moles/liter.

The molar concentration depends on change in volume of the solution which is mainly due to thermal expansion. Molar concentration is calculated by the formula, molar concentration=mass/ molar mass ×1/volume of solution in liters.

In terms of moles, it's formula is given as molar concentration= number of moles /volume of solution in liters.

In the given example,volume required is calculated as, V₂=M₁V₁/M₂

V₂=12×15/6

V₂=30 ml.

Thus, 30 ml of water is added to 15 ml of 12 M HCl to make it to 6 M solution.

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Answer:

Explanation:

Each particle, or corpuscle, of water is a regular icosahedron (20-sided geometrical solid). This is what water particles look like, according to Plato's description in the Timaeus. In the center is the water-particle Plato describes at 55b, with 6 scalene triangles making up each equilateral face of the icosahedron

Deshielded protons experience a net magnetic field strength that is higher than the applied magnetic field. Therefore, the correct answer is A) deshielded.

Deshielded protons experience a net magnetic field strength that is higher than the applied magnetic field. This is because the deshielded protons are not surrounded by as many electrons, which would normally help to shield them from the external magnetic field. As a result, the deshielded protons are more strongly affected by the magnetic field and experience a higher net magnetic field strength.

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To prepare 297.0g of chromium we need 154.21g of aluminum.

The preparation of chromium using aluminum powder is an exothermic process. It is the reaction where heat is released during the formation of product.

  Therefore, the chemical reaction for the formation of chromium is:

Cr2O3(s) + 2Al(s) -> 2CrO(s) + Al2O3(s)

Here, we can see that 2 moles of aluminum produces 2 moles of chromium.

Hence,

Molar mass of aluminum = 27g

as 2 moles of aluminum is required then 2 x 27 = 54g.

Molar mass of chromium = 54g

As, 2 moles of chromium is obtained then 2 x 54 = 104g.

Therefore, by cross multiplying we get the amount of aluminum required,

mass of aluminum produced = 54 x 297.9/ 104

                                                = 16038/104 = 154,21g.

Therefore, the required amount of aluminum is 154.21g

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Answer:

When you move the burette slider to the top of a flask and add about 25 mL of NaOH to the flask, you will cause a concentration of OH- molecules. This will make the solution become a basic solution and make the litmus paper blue.

Explanation:

After reading your question, we can see that you are carrying out a test to discover the nature of the pH of a solution. This type of test uses litmus paper, which is an indicator of the presence of acids and bases, being able to determine the pH of a solution. This paper is soaked in organic ink and when placed in an acidic solution, it is red in color. However, when placed in a basic solution it has a blue color.

An acidic solution is one that has a high concentration of H+ atoms and has the ability to donate electrons. The basic solution, on the other hand, has a high concentration of OH- and has the capacity to receive electrons.

When you move the burette slider to the top of a flask and add about 25 mL of NaOH to the flask, you will cause a concentration of OH- molecules. This will make the solution become a basic solution and make the litmus paper blue, that is, the solution has the basic pH.

Cis-trans isomers are a subtype of geometric isomers in which two similar groups on the same atom are arranged differently in space. In the cis form, the two groups are on the same side of the molecule, whereas in the trans form, they are on opposing sides.

Using the structural formula of the following substances, we need to explain which ones can exist as cis-trans isomers:1-chloropropane: CH3CH2CH2Cl can have cis-trans isomers because the Cl atom is attached to the second carbon atom, and there are two different groups attached to that carbon atom.2-chloropropane: CH3CHClCH3 can have cis-trans isomers because the Cl atom is attached to the second carbon atom, and there are two different groups attached to that carbon atom.

1-pentene: CH3CH2CH=CHCH3 can have cis-trans isomers because there is a double bond between the 3rd and 4th carbon atoms, and there are two different groups attached to the carbon atoms adjacent to the double bond.2-pentene: CH3CH=CHCH2CH3 can have cis-trans isomers because there is a double bond between the 2nd and 3rd carbon atoms, and there are two different groups attached to the carbon atoms adjacent to the double bond.

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Answer:

[OH⁻] = 8.91x10⁻¹²M

Explanation:

In aqueous solutions, the [OH] and [H⁺] are associated in the equation of hydrolisis of water:

1x10⁻¹⁴ = [OH⁻] [H⁺]

With pH, we can solve for [H⁺] and obtain, the [OH⁻] using this equation:

pH = -log [H⁺]

[H⁺]= 10^-pH

[H⁺] = 1.122x10⁻³M

1x10⁻¹⁴ = [OH⁻] [1.122x10⁻³M]

Answer:

Distance from the sea, ocean currents, direction of prevailing winds, shape of the land, latitude, temperature, air pressure and  distance from the equator.

Explanation:

Distance from the sea, ocean currents, direction of prevailing winds, shape of the land, latitude, temperature, air pressure and  distance from the equator are the factors that influence the climates of any region. These factors has a great impact on the climate of a region, those regions which are nearer to the equator experiences hot climate whereas those regions which are far from the equator having cold climatic conditions.

0.5 moles of KOH contained in 250 mL of a 2.0 M solution of KOH.

Molarity is a measure of the concentration of a solution, defined as the number of moles of solute per liter of solution.

It is commonly denoted as "M" and has units of moles per liter (mol/L). The molarity of a solution can be calculated by dividing the number of moles of solute by the volume of the solution in liters.

Given:

Volume = 250 ml

250 mL = 0.25 L

Molarity = 2.0 m

To calculate the number of moles of KOH in a solution, the formula is:

Moles of solute = Molarity x volume of solution (in liters)

Use the formula:

Moles of KOH = 2.0 M x 0.25 L

Moles of KOH = 0.5 moles

Thus, there are 0.5 moles of KOH in 250 mL of a 2.0 M solution of KOH.

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Explanation:

zinc nitrate

zn no3

valency :

2 -1

So, zn(no3)2

The chemical formula of mentioned substances is as follows 1) SO₃ 2) K\(^+\) and NO₃\(^-\) 3) ΔH 4) Cu 5) Hg (l) 6)ZnCl₂.

Chemical  formula is a way of representing the number of atoms present in a compound or molecule.It is written with the help of symbols  of elements. It also makes use of brackets and subscripts.

Subscripts are used to denote number of atoms of each element and brackets indicate presence of group of atoms. Chemical formula does not contain words. Chemical formula in the simplest form  is called empirical formula.

It is not the same as structural formula and does not have any information regarding structure.It does not provide any information regarding structure of molecule as obtained in structural formula.

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m-Nitrobenzoic acid: Benzene can be converted to m-nitrobenzene by nitration reaction using HNO3/H2SO4.

The m-nitrobenzene can be further converted to m-nitrobenzoic acid by oxidation using K2Cr2O7/H2SO4. Alternatively, benzene can be reacted with CH3Cl/AlCl3 to form m-tolyl chloride, which can be further converted to m-tolylcarboxylic acid by hydrolysis using NaOH. p-Methyl benzoic acid (p-toluic acid): Benzene can be reacted with CH3Cl/AlCl3 to form p-tolyl chloride, which can be further converted to p-tolylcarboxylic acid (p-methyl benzoic acid) by hydrolysis using NaOH.  Cl2/FeCl3: Chlorination of benzene using Cl2/FeCl3 produces a mixture of ortho, para and meta isomers of chlorobenzene. NaCN: Benzene can be converted to benzyl chloride by reacting with Cl2/FeCl3. Benzyl chloride can be further reacted with NaCN to form phenylacetonitrile. 1. NaOH/H2O2 2. H3O+: Benzene can be converted to phenol by oxidation using NaOH/H2O2, followed by acidification using H3O+. NBS/(PhCO2)2: Benzene can be reacted with NBS/(PhCO2)2 to form benzyl bromide, which can be further reacted with KOH to form phenylacetic acid.

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Scandium ion with +3 charge has the electronic configuration 1s2 2s2 2p6 3s2 3p6 and Chlorine ion with a -1 charge has the same 1s2 2s2 2p6 3s2 3p6 electronic configuration.

The Electronic configuration of Scandium is [Ar]4s2 3d1 which 1s2 2s2 2p6 3s2 3p6 4s2 3d1, but when we remove three electrons from the outermost shell of the Scandium, according to Aufbau’s principle the electrons are removed from 4s and 3d shell to give us the required Scandium ion with +3 charge with electronic configuration 1s2 2s2 2p6 3s2 3p6. Similarly, the electronic configuration of Chlorine is [Ne] 3s² 3p⁵ which is 1s2 2s2 2p6 3s2 3p5, but when we add one electron to the outermost shell of the Chlorine, according to Aufbau’s principle the electron added to 3p shell to give us the required Chlorine ion with -1 charge with electronic configuration 1s2 2s2 2p6 3s2 3p6

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Explanation:

Which is a pure substance?

1. soda

2. gasoline

3. salt water

4. carbon dioxide

carbon dioxide

Bromine, a liquid at room temperature, has a boiling point of 58°C and a melting point of -7.2°C. Bromine can be classified as a

1. compound.

2. impure substance.

3. mixture.

4. pure substance.

pure substance.

Answer:

the answer is

Explanation:

Sugar and water make a homogeneous mixture (the same proportions of its components throughout any given sample).

In the given question, salad dressing is a heterogeneous suspension combination, whereas blood is a heterogeneous colloid mixture.

A mixture contains two or more substances that are uniformly distributed.

1. Blood is a heterogeneous colloid mixture.

Blood contains many different types of cells and particles suspended in a liquid called plasma. These particles include red blood cells, white blood cells, and platelets. The particles in blood are not evenly distributed and can be seen under a microscope.

2. Salad dressing is a heterogeneous mixture.

Salad dressing contains two or more substances that are not evenly distributed. It is a mixture of oil, vinegar, and other ingredients such as herbs and spices.

Therefore, blood is a heterogeneous colloid mixture, while salad dressing is a heterogeneous suspension mixture.

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The oil will separate from the seawater when the the mixture is left to settle.

A mixture is a combination of two or more substances that are not chemically combined together.

The red-tinted oil and blue-tinted seawater represents a mixture since the two substances do not combine chemically.

When the oil and seawater are mixed and the mixture is agitated, the oil appears to be all mixed up with the seawater.

After a while, the oil separates from the seawater and floats on top of the seawater because oil is less dense than seawater.

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