2. Which of the following is NOT a necessary input for the process of photosynthesis?
A. CO2 (carbon dioxide)
B. Sunlight
C. H20 (water)
D. O2 (oxygen)

Answer:

C. 6.52 x 10^14 Hz

Explanation:

hope this helps

There are numerous ways to determine whether lead is present in an ore. Atomic absorption spectroscopy is a popular approach. With this method, an ore sample is dissolved in acid and then atomized in a flame or plasma.

The sample's atoms will absorb light at particular wavelengths that are peculiar to the element under investigation. The amount of light absorbed can be used to calculate how much lead is present in the sample. Inductively coupled plasma mass spectrometry and X-ray fluorescence spectroscopy are further techniques. It is crucial to remember that these procedures call for specialized tools and training, thus they ought to only be carried out in a lab by qualified experts.

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Answer:

Global wind patterns

Ocean currents

Global climates

Explanation:

Edge2021 correct

The factors that were affected by the breakup of the supercontinent Pangaea include global wind patterns, ocean currents, and global climates.

The Pangea was a super-landmass that originally gave rise to all continents on the Earth planet.

According to the theory of continental drift, the Pangea break up millions of years ago to generate the continents.

This theory (continental drift) has been replaced by the tectonic plate model, but the idea of Pangea has still support in the scientific community.

In conclusion, the factors that were affected by the breakup of the supercontinent Pangaea include global wind patterns, ocean currents, and global climates.

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Answer:

2.87 gram

N2 is the limiting agent

Explanation:

We will find out if there is sufficient N2 and h2 to produce NH3

a) For 2.36 grams of N2

Molar mass of N2 = 28.02

Number of moles of N2 in 2.36 grams = 2.36/28.02

Mass of NH3 = 17.034 g

Now NH3 produced form 2.36 grams of N2 =  

2.36/28.02 * 2 * 17.034 = 2.87 g NH3

b) For 1.52 g of H2  

NH3 produced = 1.52/2.016 * (2/3) * 17.034 = 8.56

N2 Is not enough to produce 2.87 g of NH3 and also H2 is not enough to make 8.56 g of NH3.  

N2 is the limiting agent as it has smaller product mass

The rate of the most of the reactions as the reaction progresses is "the rate decreases as the concentration of the reactants decreases". The correct option is B.

The reaction rate will decreases as the reaction will proceeds because of the concentration of the reactants is high when the start and after the time, the concentration will decreases and the reaction will gets slower. Therefore, the rate of the reaction will be depend on the concentration and it will decreases with the time.

Therefore, the rate of reaction will decreases as the reactant concentration will decreases. Thus, the correct option is B.

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Answer:

Armando's idea is correct.

Explanation:

Armando's idea is correct because water usually flows through the hills which is very steep and sloppy. The river that flows in the hill makes the hill narrow and deep due to the removal of rock particles which comes in the way of river. This is not the small sized sand grains that the water flows through because in the hill water flows through rock particles not sand grains.

Armando thinking that it is the very steep hill that makes this river narrow and deep is the ( correct conclusion )

When water flows through a hill some particles of the hill is washed away by the heavy flow of water ( usually flood water ) into the river. the pressure with which the water flowing through the hill enters the river will determine the river depth and also the narrowness of the river.

The size of the sand grains in the river does not determine the narrowness or depth of the river but the pressure which the water enters the river from the steep hill determine these characteristics.

Hence we can conclude that Armando's conclusion is correct.

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Answer:

the coefficient of y is -7

Answer:

Find alternatives to fossil fuels

Explanation:

The most effective long - term solution to reduce the amount of carbon dioxide emission is to find alternatives to fossil fuels.

Fossil fuels consumption and use in most industrial processes are some of the leading causes of huge carbon signatures in the atmosphere.

The statement "increasing the force will increase the moment" is true.

This is because the moment is a measure of the turning effect of a force on an object about a pivot point. It is defined as the product of the force and the perpendicular distance between the force and the pivot point. The unit of moment is the newton-meter (Nm) or the joule (J).When a force is applied to an object, it will produce a moment about the pivot point if the force is not acting along the same line as the pivot point. The magnitude of the moment depends on the force applied and the distance of the force from the pivot point. As the force increases, the moment also increases, provided that the distance from the pivot point remains constant. Conversely, if the force remains constant, but the distance from the pivot point increases, the moment also increases. This is because the perpendicular distance is directly proportional to the moment, meaning that a longer distance results in a larger moment.Therefore, it can be concluded that increasing the force applied to an object will increase the moment produced about a pivot point.

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The statement that "The volume of a gas sample mostly consists of empty space between the moving gas particles" is one of the assumptions of the Kinetic Molecular Theory regarding gases.

What is Collision?

There are different types of collisions, depending on the nature of the objects involved, the speed and direction of their motion, and the type of contact that occurs. For example, elastic collisions are those in which the total kinetic energy of the colliding objects is conserved, meaning that no energy is lost or gained during the collision. In contrast, inelastic collisions are those in which some of the kinetic energy is transformed into other forms of energy, such as heat or sound.

The Kinetic Molecular Theory is a model that describes the behavior of gases. One of the main assumptions of this theory is that gas particles are in constant random motion and move in a straight line until they collide with other particles or the walls of their container.

Another important assumption of this theory is that the volume of a gas sample mostly consists of empty space between the moving gas particles. This means that gas particles are assumed to be very small compared to the overall volume of the gas sample. Therefore, the particles do not occupy all of the available space in the container, but instead only occupy a small portion of it.

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The Brønsted-Lowry reaction can be written as; \(HPO_{4} ^{2-} + HNO_{2} ----- > H_{2} PO_{4} ^- + NO_{2}^-\). A proton was transferred in the reaction.

We know that there are various definitions of acids and bases. One of the definitions of an acid is that an acid is a substance that is able to donate a proton. In this case we look upon an acid as a proton donor in a reaction. The base is a substance that is able to able to accept to proton hence we would classify the base as a proton acceptor in a given reaction.

We now have to look at the reaction as we have seen it here. In this case, we are looking at the reaction between the substance and we are looking at the one that looses a proton and the one that gained a proton so as to be able to obtain the products of the reaction.

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Answer:

a. a gas is mad of tiny particles

Explanation:

I believe

Glucose is a carbohydrate and monosaccharide sugar molecule that is the energy source for organisms. The simplified model of a glucose molecule will show six carbon atoms, six oxygen atoms, and twelve hydrogen atoms.

Glucose is one of the monosaccharide sugar that is the most abundant energy source with a molecular formula of C₆H₁₂O₆. It consists of carbon, hydrogen, and oxygen atoms with a molecular mass of 180.156 g/mol.

It is a sugar-containing aldehydic group with a six-carbon making it aldohexoses. It is found in honey and fruits that are the source of the energy and regulates metabolic and cellular reactions.

Therefore, the molecular structure of glucose contains six carbon, twelve hydrogens, and six oxygen atoms.

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Most fossil fuels are from 300-400 million-year-old plants and animals. They develop over millions of years, yet we use them quicker than they can be replenished.

This is further explained below.

Generally, fossil fuel is a substance containing hydrocarbons that were generated naturally in the crust of the earth from the remnants of plants and animals that have died and that are then recovered and burnt as fuel. Coal, crude oil, and natural gas are the three primary types of fossil fuels.

In conclusion, The majority of the elements that make up fossil fuels are derived from dead plants and animals that existed around 300–400 million years ago.

Therefore, it takes millions of years for them to develop, and we are consuming them at a rate that is far quicker than the rate at which they can be replaced by new ones.

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Answer:

Example 1

palladium(II) nitrate,

Example 2

Metal catalysts such as Fe, Ni, Mo, and Co are routinely used in the manufacture of CNMs.

Explanation

The three metals used in catalytic converters — rhodium, platinum and palladium — are part of a category known as platinum group metals, or PGMs, which are known for their catalytic properties.

Answer:

It is the release of stored chemical energy in food to produce ATP.

The correct answer is B. 8 molecules \(SO_3\). Option B

In the given reaction:

S(s) + \(O_2\)(g) → \(SO_3\)(g)

The stoichiometric coefficient in front of the \(SO_3\)molecule is 8, which indicates that 8 molecules of \(SO_3\)are formed as a product. This coefficient represents the ratio of the number of molecules involved in the reaction.

Option A (8 atoms \(SO_3\)) is incorrect because it only mentions the number of atoms, not molecules. The stoichiometric coefficient does not represent the number of atoms, but rather the number of molecules.

Option C (80.07g \(SO_3\)) is incorrect because it mentions a specific mass. The stoichiometric coefficient does not directly represent the mass of the substance, but rather the relative amount of molecules involved in the reaction.

Option D (32 \(SO_3\)) is incorrect because it mentions a specific volume. The stoichiometric coefficient does not directly represent the volume of the substance, but rather the relative amount of molecules involved in the reaction.

Therefore, the correct way to describe the \(SO_3\)component in the reaction is option B: 8 molecules \(SO_3\). This represents the ratio of the number of molecules of \(SO_3\)that are produced in the reaction.

Option B

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The kinetic theory of matter states that all matter is made up of minute particles with space in between them that move randomly. The theory is based on the fact that matter is composed of small particles.

Based on the atoms of an ideal gas, KMT has five hypotheses:

1. Gases are made up of several molecules moving randomly and constantly in linear motion.

2. The volume of all the molecules is dwarfed by the volume of the gas as a whole.

3. Intermolecular forces are negligible.

4. The average kinetic energy of every molecule in the gas stays constant as long as the temperature stays constant. Molecular collisions are therefore entirely elastic.

5. The average kinetic energy of all molecules in a gas depends on its absolute temperature. This shows that at any temperature, gas molecules in equilibrium have the same average kinetic energy (but NOT the same velocity and mass).

The kinetic-molecular theory, a theory that characterizes the states of matter, is based on the presumption that matter is composed of small particles that are constantly in motion. The theory clarifies observed properties and behaviors of gases, liquids, and solids.

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Among Acetone, butane, and propanol except for butane, the other two compounds possess polar bonds.  

Polar bonds are when one end of a molecule has a positive charge and the other end has a negative charge. Butane has no polar bonds because its atoms have the same electronegativity.

Acetone has a polar bond because the oxygen atom has a higher electronegativity than the carbon and hydrogen atoms, creating a charge difference between them.              

Propanol has two polar bonds. The oxygen atom has a higher electronegativity than the hydrogen and carbon atoms, creating a charge difference between them.

Additionally, the hydrogen atoms are slightly more electronegative than the carbon atom, creating a second charge difference within the molecule. This charge difference is what makes the polar bonds in propanol.

The image attached explains the polar bonds in each compound

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A sample of ammonia gas has a final temperature of 313.25K.

The Combined Gas Law is a combination of the Ideal Gas Law and Charles’s Law. It states that the ratio of the pressure of a gas, its volume, and its temperature is constant, provided the amount of gas and the molar mass of the gas remain the same. The combined gas law states that the ratio of the product of pressure and volume of a gas is equal to the product of the pressure and volume of the same gas at a different temperature.

Rearranging the equation to solve for T2, we have:

\(T2 = \frac{(P1V1T1)}{P2V2}\)

Substituting the given values, P1 has value 3.84 atm,V1 has value 250mL,P2 has value 5.84 atm,V2 has value 215mL and T1 has value (35+273) degrees, we have:

\(T2 = \frac{(3.84 * 250 * 35 + 273) }{ (5.84 * 215)}\\T2 = 313.25 K\)

Therefore,The final temperature of a sample of ammonia gas is 313.25K

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Answer:

its sodium hydroxide

Explanation:

Answer:

See explanation

Explanation:

For the first part of the question, we have to check the chiral carbons in 4-methyl-1,2-cyclohexanediol. In this case carbons, 1 and 2 are chiral, if we have 2 chiral carbons we will have 4 isomers. We have to remember that formula 2^n in which "n" is the number of chiral carbons, so:

2^n = 2^2 = 4 isomers

And the isomers that we can have are:

1) (1R,2S)-4-methylcyclohexane-1,2-diol

2) (1S,2S)-4-methylcyclohexane-1,2-diol

3) (1S,2S)-4-methylcyclohexane-1,2-diol

4) (1S,2R)-4-methylcyclohexane-1,2-diol

See figure 1

For the second part of the question, we have to remember that the oxidation with \(OsO_4\) is a syn addition. In other words, the "OHs" are added in the same plane. In this case, we have the methyl group with a wedge bond, so the "OH" groups will have a dashed bond due to the steric hindrance. Due to this we only can have 1 isomer ((1S,2R,4S)-4-methylcyclohexane-1,2-diol). Finally, on this molecule, we dont have any symmetry planes (this characteristic will cancel out the optical activity), so the product of this reaction has optical activity.

See figure 2

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Molar concentration of Zn2+ions in a solution is 3.481 mol/lit

The electrode potential value is 59mV

Temperature=298k

What is electrode potential?

equation formed- Zn → Zn2+ + 2e

              from Nernst equation-

E=E cell - 0.059 log [Zn2+]

[zn2+]=3.481 mol/lit

hence, Molar concentration of Zn2+ions in a solution is 3.481 mol/lit

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The reaction you underwent was anhydride. Anhydride behavior is strikingly similar to that of acid chloride.  the motion of electrons, use a curving arrow. consist of all lone pairings. Any leftover acetic anhydride was destroyed by the addition of water. the end result of adding water to acetic anhydride.

What is acetic anhydride?

An anhydride functions very much like an acid chloride. electron movement is depicted by the curved arrow. An anhydride functions very much like an acid chloride. the motion of electrons, use a curving arrow. consist of all lone pairings. In a condensation reaction involving the elimination of a water molecule, acetic anhydride is created from two acetic acid molecules.

D and L-structures phenylalanine's are made up of amino acids, which both have amino groups.

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,Answer:

Fe(NO_3)_2

Explanation:

The compound iron (II) nitrate, Fe(NO₃)₂, consists of one iron atom, two nitrogen atoms, and six oxygen atoms.Thus, there are 6 moles  of oxygen in 1 mole of iron (II) nitrate.

To determine the number of moles of oxygen in one mole of iron (II) nitrate, we need to find the molar ratio between oxygen and iron (II) nitrate.In one mole of iron (II) nitrate, there are 6 moles of oxygen atoms because each mole of Fe(NO₃)₂ contains 6 moles of oxygen atoms.

Mole is defined as the unit of amount of substance . It is the quantity measure of amount of substance of how many elementary particles are present in a given substance.

It is defined as exactly 6.022×10²³ elementary entities. The elementary entity can be a molecule, atom ion depending on the type of substance. Amount of elementary entities in a mole is called as Avogadro's number.

Therefore, there are 6 moles of oxygen in 1 mole of iron (II) nitrate.

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