Glucose is a product of photosynthesis. True or false

Answer:

It can be formed either through a process of evaporation or sublimation. Unlike clouds, fog, or mist which are simply suspended particles of liquid water in the air, water vapour itself cannot be seen because it is in gaseous form

Explanation:

hope it help

Answer:

No. Unlike clouds, fog, or mist which are simply suspended particles of liquid water in the air, water vapour itself cannot be seen because it is in gaseous form

Two atoms with various electronegativity levels. The electrons in a bond are not distributed equally when one atom is bound to a more electronegative atom. Polar covalent bonds are this kind of bond.

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Secondary consumers are organisms that primarily feed on herbivores or other primary consumers.

They occupy the next trophic level above the primary consumers in a food web. They obtain energy by consuming the primary consumers and play an important role in regulating the population of herbivores.

Examples of commonly observed secondary consumers include:

Carnivorous mammals: Animals such as wolves, lions, and tigers that feed on herbivores like deer, zebras, or gazelles.

Birds of prey: Species like eagles, hawks, and owls that consume small mammals, reptiles, or other birds.

Carnivorous fish: Fish like pike, barracuda, or bass that prey on smaller fish or aquatic invertebrates.

Predatory insects: Insects such as spiders, mantises, or dragonflies that feed on other insects, including herbivorous insects.

In a specific food web, the identification of secondary consumers would depend on the specific organisms present and their feeding interactions. It would be necessary to analyze the trophic relationships among the organisms in the food web to determine the secondary consumers accurately.

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Answer:

the reducing agent is the Na ion, therefore the Na ion is oxidised. The oxidising agent is Cl ion, therefore the Cl ion is reduced.

If you react 1.000 g of lead ions with 1.250 g of the chemical chosen in part a, the theoretical amount of precipitate produced is 26.3 g.

To calculate the mass of precipitate that would be theoretically produced, we need to use the mole ratio between the lead ions and the chemical chosen in Part A. We will call the chemical chosen in Part A "X" for this example.

1.000 g of lead ions is equivalent to 1.000 g/207.2 g/mol = 0.0048 mol of lead ions.

1.250 g of X is equivalent to 1.250 g/molar mass of X = 0.0375 mol of X.

Now, we can calculate the mole ratio of lead ions to X, which is 0.0048 mol/0.0375 mol = 0.128.

We can use the mole ratio to calculate the mass of the precipitate, which is 0.128 x (207.2 g/mol of lead) = 26.3 g of precipitate.

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The density of a cube of metal with 2 inches on a side and weighs 444.5 grams is 3.390 g/cm³. Hence, option A is correct.

Density is the measurement of how tightly a material is packed together.

Given data:

Weight =444.5 grams

Side = 2 inches= 5.08 cm

Volume = 5.08 cm x 5.08 cm x 5.08 cm

Density = \(\frac{Mass}{Volume}\)

Density = \(\frac{444.5 \;grams}{131.09 cm^3}\)

Density = 3.390 g/cm³

Hence, the density of a cube of metal with 2 inches on a side and weighs 444.5 grams is 3.390 g/cm³.

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Responda:

+ 0,9kJ / mol

Explicação:

Dados os calores de combustão do enxofre monoclínico e enxofre rômbico como - 297,2 kJ / mol e - 296,8 kJ / mol, respectivamente para a variação na transformação de 1 mol de enxofre rômbico em enxofre monoclínico conforme mostrado pela equação;

S (mon.) + O2 (g) -> SO2 (g)

Uma vez que são todos 1 mol cada, a mudança na entalpia será expressa como ∆H = ∆H2-∆H1

Dado ∆H2 = -296,8kJ / mol

∆H1 = -297,2kJ / mol

∆H = -296,8 - (- 297,2)

∆H = -296,8 + 297,2

∆H = 297,2-296,8

∆H = + 0,9kJ / mol

Portanto, a mudança na entalpia da equação é + 0,9kJ / mol

Compared to ionic compounds, molecular compounds generally have a low boiling point and the correct option is option D.

Molecular compounds are held together by covalent bonds. They are also called covalent compounds.

Covalent bonds are responsible for many of the properties of covalent compounds. Covalent compounds have relatively low boiling points, cannot conduct electricity, and may not dissolve in water.

Unlike ionic compounds, covalent compounds do not have freely moving electrons, so they cannot conduct electricity.

The individual molecules of covalent compounds are more easily separated than the ions in a crystal, so most covalent compounds have relatively low boiling points.

Therefore, compared to ionic compounds, molecular compounds generally have a low boiling point and the correct option is option D.

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Answer:

B. Your stomach jumps when you ride a roller coaster.

Explanation:

Newton's 3rd Law states :

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#1: This does not work because this option applies to Newton's second law of motion.

- Newton's second law states that the net force equals the product of mass and acceleration.

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#2: This option works since it applies to Newton's third law of motion.

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#3:  This works but is not the best answer applying to Newton's third law of motion.

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Answer:

The answer could vary between B and C, personally I believe B applies to Newton's third law of motion more as it applies and matched every text word for word in the statement of Newton's 3rd law of motion.

Option B is the answer.

Hope this helps,

- ROR

Answer:

The volume of nitrogen gas at STP is 55.1 liters

The volume of the nitrogen gas at STP is equal to 49.8 L.

The ideal gas law can be defined as an equation of the state of an ideal gas. This law states that the multiplication of the volume and pressure of an ideal gas is equal to the product of the absolute temperature and gas constant.

The mathematical expression of the ideal gas law can be written as:

PV = nRT

where n is the amount of substance, V is the volume, P is the pressure,  and R is the gas constant.

Given, the mass of the nitrogen gas, m = 62.3 g

The molecular mass of the nitrogen gas, M = 28 g

The number of moles of nitrogen gas, n = m/M = 62.3/ 28 = 2.225 mol

The temperature at STP, T = 273.15 K and pressure, P = 1 atm

The universal gas constant, R = 0.082 atmL/K mol

Substituting the values n, R, P, and T in the ideal gas equation, we get:

1 × V = 2.225 × 0.082 × 273.15

V = 49.8 L

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The isotopes of carbon are carbon-12, carbon-13, and carbon-14.

Isotopes are atoms of the same element containing the same number of protons in their nucleus but having different numbers of neutrons in the nucleus of the atom.

Hence, the masses of isotopes of elements vary.

Carbon has three naturally occurring isotopes, which are:

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Answer:

b)6.2 grams

Explanation:

Recall that percentage yield =

actual yield/theoretical yield * 100/1

theoretical yield = 8.2 grams

percentage yield = 75%

Let the actual yield be x

Hence;

75 = x/8.2 * 100

75 = 100x/8.2

75 * 8.2 = 100x

x = 75 * 8.2/100

x = 6.15 g

x = 6.2 g

75 =

1. Ensure Clear and Visible Placement: Machine controls should be located in a position that is easily accessible, visible, and within reach of the equipment operator. Clear and intuitive labeling or color-coding can also be used to enhance visibility and assist in identifying the controls quickly.

2. Provide Adequate Guarding: The machine controls should be positioned in a manner that minimizes the risk of accidental activation or unintended operation. This can be achieved by incorporating appropriate guarding or barriers around the controls to prevent inadvertent contact or interference.

3. Consider Ergonomics and Operator Comfort: When determining the location of machine controls, it is essential to consider ergonomic principles and operator comfort. Controls should be positioned in a way that allows operators to maintain a comfortable and natural posture while operating the equipment. This can help reduce the risk of operator fatigue, musculoskeletal disorders, and errors due to discomfort or awkward reach.

These rules aim to promote operator safety, minimize the potential for accidents, and ensure efficient and effective control of equipment involving fluid power components.

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a) The explosiveness of hydrogen gas is a chemical property.

b) The bronze color of copper is a physical property.

c) The shiny appearance of silver is a physical property.

d) The ability of dry ice to sublime (change from solid directly to vapor) is a physical property.

Chemical properties are properties that describe the behavior of a substance during a chemical reaction or a chemical change. Explosiveness of hydrogen gas is an example of a chemical property because it describes how hydrogen gas reacts with oxygen to form water and how the reaction releases a large amount of energy in the form of an explosion.

Physical properties, on the other hand, are properties that describe the characteristics of a substance that can be observed or measured without changing the composition of the substance. Examples of physical properties include the color, texture, and melting point of a substance. The bronze color of copper and the shiny appearance of silver are both examples of physical properties.

The ability of dry ice to sublime (change from solid directly to vapor) is also a physical property because it describes a physical change that occurs when dry ice is heated or exposed to high pressure.

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a. Butanone is the most soluble in water because it can form hydrogen bonds with water molecules due to its carbonyl group.

b. Ethanoic acid (acetic acid) is the most soluble in water because it can form hydrogen bonds with water molecules and it also has a small hydrophobic tail.

a. Butanone is the compound that is most soluble in water among the group of butanone, butanoic acid, and butane. This is because butanone is a polar compound with a dipole moment, which allows it to form hydrogen bonds with water molecules, resulting in better solubility in water. Butanoic acid, on the other hand, is a weak acid and can form hydrogen bonds with water molecules through its -COOH functional group, but the hydrophobic hydrocarbon tail makes it less soluble in water than butanone.

b. Ethanoic acid (acetic acid) is the compound that is most soluble in water among the group of ethanoic acid, hexanoic acid, and octanoic acid. Ethanoic acid is a polar compound with a hydrogen bond-donating -OH group, which can form hydrogen bonds with water molecules, resulting in better solubility in water. Hexanoic acid and octanoic acid are larger and have longer hydrocarbon tails, which makes them less soluble in water than ethanoic acid.

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Full Question: Identify the compound in each group that is most soluble in water. Explain.

a. butanone, butanoic acid, butane

b. ethanoic acid (acetic acid), hexanoic acid, octanoic acid

18.5 * 10² milliliters of NaCl solution have to use to deliver 18.5g of NaCl.

Given data:

1% (m/v) NaCl

For 18.5g

1g --------------------------100ml

18.5g ---------------- Xml

X = 1850ml

The mass/ volume percent of a result is defined as the rate of the mass of solute that's present in a result, relative to the volume of the result, as a whole. Because this type of attention is expressed as a chance, the indicated proportion must be multiplied by 100.

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Answer:

123.5 kPa

Explanation:

P2=P1T2/T1

You can check this by knowing that P and T at constant V have a proportional relationship. Hence, this is correct.

The number of formula units present in 4.80×10⁻³ mole of NaI is 2.89×10²¹ formula units

From Avogadro's hypothesis, we understood that 1 mole of NaI contains 6.022×10²³ formula units as shown below

1 mole of NaI = 6.022×10²³ formula units

Therefore, we can obtain the formula units in 4.80×10⁻³ mole of NaI as follow:

From Avogadro's hypothesis,

1 mole of NaI = 6.022×10²³ formula units

Therefore

4.80×10⁻³ mole of NaI = 4.80×10⁻³ × 6.022×10²³

4.80×10⁻³ mole of NaI = 2.89×10²¹ formula units

Thus, the formula units present is 2.89×10²¹ formula units

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Answer:

Plant cells have a cell wall, chloroplasts and other specialized plastids, and a large central vacuole, which are not found within animal cells. The cell wall is a rigid covering that protects the cell, provides structural support, and gives shape to the cell.

Explanation:

MOST BRAINLIEST

By performing the necessary calculations and comparing the Q/K ratios, we can determine whether calcite or dolomite would form first in the given water sample with [Mg2+]∼0.10 mmol/L.

To determine which mineral, calcite or dolomite, would form first in the given water sample with [Mg2+]∼0.10 mmol/L, we need to calculate the saturation index (SI) for each mineral by comparing the Q/K ratios. The mineral with the higher SI will be more likely to precipitate first.

The saturation index (SI) is calculated by comparing the ion activity product (Q) with the equilibrium constant (K) for a particular mineral. In this case, we have the equilibrium reaction: CaMg(CO3​)2​⇌Ca2++Mg2++2CO3​2−.

For calcite, the Q/K ratio can be calculated using the concentration of Ca2+ and CO3​2− ions in the water sample. Since dolomite contains both Ca2+ and Mg2+ ions, we need to consider the concentration of Mg2+ as well.

By comparing the Q/K ratios for calcite and dolomite, we can determine which mineral has a higher saturation index (SI). The mineral with the higher SI will be more likely to precipitate first.

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Answer:

A. 1 = 3 - 2

Explanation:

What defines an expression?

expression - An expression is a sentence with a minimum of two numbers and at least one math operation. This math operation can be addition, subtraction, multiplication, and division.

So if we look at the letter options we can see that A is the best choice.

Answer:

The formation of gas bubbles is often the result of a chemical change.

A primary explosive is a sensitive explosive that almost always explodes with a single ignition from a primary heat source of sufficient intensity, such as a spark, flame, impact, or other primary heat source.

Primary explosives can explode as a result of a spark or a relatively weak mechanical stress. They start the primary explosive when used as blasting caps (detonators). Additionally, they are loaded with friction-mixed materials and other ingredients in percussion caps.

A highly brisant starting explosive with a high triggering velocity is required. Mercury fulminate, lead azide, lead trinitroresorcinate, silver azide, diazodinitrophenol, and tetrazene, which is a primer additive, are the most significant primary explosives.

Only if they have already been pressed into capsules must initiation charges be transported.

Therefore, A primary explosive is a sensitive explosive that almost always explodes with a single ignition from a primary heat source of sufficient intensity, such as a spark, flame, impact, or other primary heat source.

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Answer:

Plant breeding

Plant breeding is the science of changing the traits of plants in order to produce desired characteristics. It has been used to improve the quality of nutrition in products for humans and animals.

Explanation:

Answer:

b

Explanation:

When solid converts to gas then heat is required to break the intermolecular forces of attraction between the particles. Therefore, the correct option is option B.

Phase transition is a process in which transition takes place from one state to another of a medium on changing temperature or pressure. Phase transition is a physical process as there is no breaking of old bond and forming of new bonds takes place.

During phase transition temperature remain constant as the extra heat that is given to the system that goes into breaking of intermolecular forces of attraction between the particles. So overall temperature remains same but heat keeps on increasing. the solution can be broken down as Cool liquid from 314 K to 273 K, freeze liquid at 273 K.

Therefore, the correct option is option B.

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Oki

so heres the formula:

\(2 {2.(0 \frac{ \frac{5 \frac{ \leqslant { {3 {2 { { \frac{5}{?} }^{2} }^{2} }^{2} }^{?} }^{?} }{?} }{?} }{?} }^{2} \)

The structure of aldohexose is drawn.

D-glucose is an aldohexose, which means it is a 6-carbon sugar with an aldehyde group (-CHO) at one end. It is a crucial molecule in the metabolism of living organisms and is the primary source of energy for most cells. D-glucose exists in two forms, alpha and beta, which differ in the orientation of the hydroxyl (-OH) group at C1.

D-glucose can also form ring structures, with the aldehyde group reacting with a hydroxyl group on another carbon atom. These ring structures can also exist in alpha and beta forms, depending on the orientation of the -OH group attached to the ring oxygen. Overall, D-glucose plays a critical role in the biochemistry of life, serving as a building block for complex carbohydrates and other biomolecules.

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Answer: 2150000 cm

Explanation:

Hey there!

In order to find the answer you have to MULTIPLY the kilometers (km) [21.5] from 100,000 and then you should be able to find your answer in centimeters (cm)

21.5 km * 100,000 = ? cm

Simplify that equation:

cm = 2,150,000

Therefore, your answer should be: 2,150,000

Good luck on your assignment & enjoy your day!

~Amphitrite1040:)

Answer:

The block floats

Explanation:

Density is the amount of matter contained in an object compared to its volume. It is the ratio of mass to volume. The SI unit of density is kg/m³. The formula of density is:

Density = mass / volume

An object floats when placed in a liquid if its density is less than that of the liquid and sinks if its density is greater than that of the liquid.

The cooking oil has a density = 0.526 g/cm³

The density of block = mass / volume = 20 g / 44 cm³ = 0.4545 g/cm³

Since the density of the block is less than that of the cooking oil, the block will float when placed into the cooking oil.