What do scientists think is the
reason the mollusks have been so
successful through time?
B

Answer:

mL

Explanation:

milliliters

The dark processes, a complicated series of enzymatically controlled chemical reactions, are what turn carbon into organic molecules. This word is rather misleading because these responses can occur in both light and darkness. As a result of extended darkness, some of the enzymes involved in the so-called dark processes become dormant; nevertheless, when the leaves that contain them are exposed to light, they become active.

The synthesis of intermediate sugar phosphates occurs in a cyclic process during the Calvin-Benson cycle, which involves the fixation, reduction, and use of carbon. Three molecules of carbon dioxide are used in a full cycle, which results in the production of one molecule of the three-carbon chemical glyceraldehyde-3-phosphate (Gal3P). Typically, the chloroplasts either export this three-carbon sugar phosphate or convert it to starch the chloroplast's inside.

The process of adding carbon dioxide to the five-carbon compound ribulose 1,5-bisphosphate (RuBP) and splitting the resulting six-carbon compound into two molecules of PGA is known as the initial incorporation of carbon dioxide, which is catalyzed by the enzyme ribulose 1,5-bisphosphate carboxylase (Rubisco). Each full turn of the cycle sees this reaction take place three times, resulting in the production of six PGA molecules.

C. 51.5%  is the percent yield for the reaction below when 364 g SO2 and 42.0 g O2 produce 408 g SO3

The actual yield is determined by calculating the quantity of the product created. We can estimate the percentage yield by dividing the actual yield by the theoretical value. The percentage yield is the difference between the quantity of product that was actually created and the maximum calculated yield.

2SO₂(g) + O₂(g) → 2SO3(g)

SO₂ mass => 364g

O₂ mass => 42g

SO3 mass => 408g

Theoretical yield of SO3:

mole of  O₂ => 42g/32g => 1.31

according to the chemical equation:

1 mole of oxygen => 2 moles of SO3

1.31 mole O2 => x moles of SO3

x=> 2 x 1.31 => 2.62

Hence, the mass of SO3 => 2.62 x 80.06 => 209.75g

The percentage of yield => Actual yield / theoretical yield x 100

                                  => 209.75/408 x 100 => 51.45 => 51.5%

The theoretical yield is the yield that is derived using a balanced chemical reaction. What you actually acquire from a chemical reaction is the actual yield.

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No, the inverse of the matrix represented as M=[-1 -4] does not exist.

An inverse matrix is a square matrix that, when multiplied by its original matrix, yields the identity matrix. It allows for solving linear equations involving the original matrix.

To determine if a matrix has an inverse, we can compute its determinant. If the determinant is nonzero, then the matrix has an inverse; if the determinant is zero, then the matrix does not have an inverse.

The given matrix M is a 1x2 matrix, so it's not square and it doesn't have an inverse.

Therefore, we can't find the inverse of matrix M.

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Answer:

378.196

Explanation:

Multiply the length value by 1.609.

235 miles = 378.196 kilometers

Answer:

378.196 Kilometers

Explanation:

For an approximate result, multiply the length value by 1.609.

235*1.609 = about 378.2

Answer:

c) selenium

Explanation:

Selenium is present in group sixteen.

It has six valance electrons.

Its atomic number is 34.

Atomic mass of selenium is 78.96 amu.

Electronic configuration pf selenium:

Se₃₄ = 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁴

we can see there are six valance electrons are present in selenium (4s² 4p⁴).

Valance electrons are those electrons which are present in outer most  electronic shell.

Other options are incorrect because,

There are  4 valance electrons in carbon.

2 valance electrons of barium.

one valance electron of lithium.

Answer:

pfffft definitely 10. smh silly goose

"Ground squirrels eat nuts, leaves, roots, seeds, and other plants. They also catch and eat small animals, such as insects and caterpillars.Though they are terrific climbers, these squirrels do come to the ground in search of fare such as nuts, acorns, berries, and flowers. They also eat bark, eggs, or baby birds."

Answer:

In the middle of every atom is the nucleus. The nucleus contains two types of subatomic particles, protons and neutrons. The protons have a positive electrical charge and the neutrons have no electrical charge. D. No Charge

Explanation:

Answer:

C & D

Explanation:

Just took quiz and got it right! Hope this helps! <3

Answer:  1,950 N

Explanation:

2812.5N of force is needed to accelerate a 1,875 kg object at a rate of 1.5 m/s².

HOW TO CALCULATE FORCE:

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Answer:

2Al+3FeO→Al2O3+3Fe

Explanation:

Basically, to get this answer, you need to balance the amount of Aluminum to the ammount on the other side which is 2 so you need 2 Al to balance the reaction correct, next you move on to the amount of Oxygen in the reaction, there are three Oxygen’s on the right and one on the left, so you need 3 FeO in order for the Oxygens to be balanced. Now that the Iron is unbalanced on both sides, you need 3 Fe (on the right) in order for the equation to be balanced.

The balanced chemical reaction is \(2Al+3FeO\) → \(Al_2O_3+3Fe\)

A balanced chemical equation occurs when the number of atoms involved on the reactants side is equal to the number of atoms on the products side.

To balance a reaction means to make the number of atoms the same on both the reactants and products sides. To do so, coefficients need to be added to the chemical equation.

Hence, the balanced the chemical reaction is \(2Al+3FeO\) → \(Al_2O_3+3Fe\).

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The balanced chemical equation for the decomposition of aspirin (acetylsalicylic acid) is:

\(2C_{9}H_{8}O_{4} (aspirin) → 2C_{7}H_{6}O_{3} (salicylic acid) + 2CO_{2} (Carbon dioxide) + H_{2}O (water)\)

In this reaction, the aspirin molecule breaks down into salicylic acid, carbon dioxide, and water. The reaction is typically catalyzed by heat or exposure to acidic or basic conditions.

Aspirin, or acetylsalicylic acid, contains ester functional groups that can undergo hydrolysis. Under suitable conditions, the ester bond in aspirin is cleaved, leading to the formation of salicylic acid, which is the primary decomposition product. Additionally, carbon dioxide and water are released as byproducts of the reaction.

The balanced equation shows that for every two molecules of aspirin, two molecules of salicylic acid, two molecules of carbon dioxide, and one molecule of water are formed. Understanding the decomposition of aspirin is important in pharmaceutical and chemical industries to ensure the stability and shelf-life of the compound, as well as to study its breakdown products and potential side reactions.

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Answer:

you need to state the options

Answer:

If it is elemental gas, the oxidation number is $$0$$.

Explanation:

The oxidation number of an atom in a chemical bond, is the charge left on the atom

Answer:

x, y, w, z

Explanation:

hope it’s right, but i think it is :)

Answer:

x y w z

Explanation:

Answer:

false

Explanation:

this is because , high temperature speeds up the the random motion of particles which leads to high dissolution

Answer:

No it has not.

Explanation:

The actual chemical compound has not changed, the materials have mixed but no reaction has taken place. Blowing the bubbles causes a physical change. Hope this helped!

Mixing soap and water and forming bubbles is a physical change as there is no change in composition.

Physical changes are defined as changes which affect only the form of a substance but not it's chemical composition. They are used to separate mixtures in to chemical components but cannot be used to separate compounds to simpler compounds.

Physical changes are always reversible using physical means and involve a change in the physical properties.Examples of physical changes include melting,boiling , change in texture, size,color,volume and density.Magnetism, crystallization, formation of alloys are all reversible and hence physical changes.

They involve only rearrangement of atoms and are often characterized to be changes which are reversible.

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Strong acid + strong base = neutral salt;

strong acid + weak base = acidic salt;

weak acid + strong base = basic salt;

weak acid + weak base = it depends on the relative strength of the acid and base.

1. NaOH is a strong base; CH3COOH is a weak acid. The resulting salt, CH3COONa, will be basic (b).

2. HBr is a strong acid; NH3 is a weak base. The resulting salt, NH4Br, will be acidic (c).

3. H2SO4 is a strong acid; Ca(OH)2 is a strong base. The resulting salt, CaSO4, will be neutral (a).

\( { \bf\implies 17.99u}\)

To find atomic mass of water (\(\bf{H_2O}\))

We know that,

\(\mapsto\)1 × 2 + 15.99 × 1

\(\mapsto\)2 + 15.99

\(\mapsto\) 17.99u Ans.

Learn the Period table of Elements to solve this type of questions. It is very important. I attached the period table of elements. Learn it and you are able to solve it.

When hydrogen bromide is added to 2-methylbut-2-ene, two products are expected to be produced: 2-bromo-2-methylbutane (major product) and 3-bromo-2-methylbutane (minor product).

The addition of HBr to 2-methylbut-2-ene follows the Markovnikov addition rule. This means that the hydrogen atom and the bromine atom will add to the carbon atoms in the double bond, such that the hydrogen atom adds to the carbon with the greater number of hydrogen atoms, and the bromine atom adds to the carbon with the lesser number of hydrogen atoms.

In this case, the hydrogen atom will attach to the second carbon atom, which has three hydrogen atoms, while the bromine atom will attach to the third carbon atom, which has only one hydrogen atom. This produces the major product, 2-bromo-2-methylbutane.

The formation of the minor product, 3-bromo-2-methylbutane, occurs due to the rearrangement of the carbocation intermediate formed during the addition reaction. The carbocation can rearrange either by shifting a methyl group from the second to the third carbon, or by shifting a hydrogen atom from the third to the second carbon. This rearrangement produces the minor product, 3-bromo-2-methylbutane.

In conclusion, the addition of HBr to 2-methylbut-2-ene produces two products: 2-bromo-2-methylbutane (major product) and 3-bromo-2-methylbutane (minor product). The major product forms due to Markovnikov addition rule, while the minor product forms due to carbocation rearrangement.

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J.J. Thomson discovered electrons and their negative charge through the cathode ray experiment, leading to the development of the plum pudding model of the atom.

J.J. Thomson, a British physicist, was the first to discover electrons in 1897.

He conducted the cathode ray experiment to identify the negatively charged particles.

The cathode ray tube is a vacuum-sealed glass tube with two electrodes at each end: a cathode and an anode.

When a high voltage electrical current is applied to the electrodes, the tube glows, indicating that the cathode rays are being emitted from the cathode and traveling through the tube towards the anode.

The cathode rays were found to have a negative charge, according to Thomson.

These rays were identified as particles by the presence of a magnet, which caused the particles to bend in the direction opposite to the magnet's polarity.

This discovery indicated that the particles had a charge on them because they were deflected by the magnetic field, which is only possible if the particles have an electric charge.

Thomson further concluded that these particles were about 1,000 times smaller than hydrogen atoms because of the degree of deflection they experienced in the magnetic field.

Furthermore, Thomson created the plum pudding model of an atom, in which electrons are dispersed throughout a positively charged matrix, based on his findings.

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Answer:

C.) 35

Explanation:

The mass is made up of the total protons and neutrons in an atom. Protons and neutrons both have a mass of 1 amu. Electrons are not included in this measurement because they have an insignificant mass (practically 0).

(17 protons x 1 amu) + (18 neutrons x 1 amu) = 35 amu

Therefore, if an atom contains 17 protons and 18 neutrons, the mass should be 35 amu.

Answer:

C6H12O6

Explanation:

C6H12O6

Answer:

neviem

Explanation:

It is an amine, and it has less polar nitrogen-hydrogen and oxygen-hydrogen bonds.

A compound's boiling point is a physical characteristic. These intramolecular linkages between the molecules that make up a chemical affect these physical characteristics.

Alcohols and amino acids have the same kind of intermolecular linkages. The hydrogen bond is the name of this kind of bond.

The electrical attraction between a hydrogen atom from one molecule and an electronegative atom from a nearby molecule is known as a hydrogen bond.

The strength of the bond is in the following order: H.....F > H.....O > H......N

The H....N hydrogen bonds exist in amines, whereas the H....O hydrogen bonds exist in alcohols.

Consequently, the alcohol's hydrogen bonds are stronger and it will impart a higher boiling point on the compound.

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Answer:uses world like

Explanation:

Answer:

52.206 kg

Explanation:

From the given information:

Mass of hexane C6H14 = \(19.3*10^3 \ g \times \dfrac{38.3}{100}\)

= 7391.9 g

Mass of octane C8H18 = \(19.3*10^3 \ g \times \dfrac{13.9}{100}\)

= 2682.7 g

Mass of decane C10H22 = \(19.3*10^3 \ g \times \dfrac{47.8}{100}\)

= 9225.4 g

However, recall that:

number of moles of an atom = mass/molar mass

∴

For hexane, no of moles = 7391.9 g/86.18 g/mol

= 85.77 moles

For octane, no of moles = 2682.7 g/114.23 g/mol

= 23.49 moles

For decane, no of moles = 9225.4 g/142.29 g/mol

= 64.84 moles

Therefore:

number of moles of CO2 produced = (6 × 85.77)+(23.49)+(10×64.84) moles

= 1186.51 moles

Finally, the mass of CO2 produced is:

= 1186.51 mol × 44 g/mol

= 52206.44  g

= 52.206 kg

Answer:

Preventing erosion – Land Reclamation

Protecting nesting areas – Protecting Biodiversity

Preventing littering – Land Reclamation

Preventing habitat disruption – Protecting Biodiversity

Protecting native species – Protecting Biodiversity

Preventing contamination of soil – Land Reclamation

Explanation:

I really hope I'm right! I tried my hardest, please give me brainliest :)

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