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The reaction which shows oxidation and reduction simultaneously is C₆H₁₂O₆(s) + 6O₂(g) → 6CO₂(g) + 6H₂O(l).

Those reaction in which oxidation as well as reduction of substances takes place simultaneously will known as redox reactions.

Above reaction are not the redox reactions as in these reaction oxidation and reduction simultaneously not takes place.

In the above reaction reduction of oxygen takes place as its oxidation state changes from 0 to -2, and at the same time oxidation of carbon takes place as its oxidation state changes from 0 to +4.

Hence correct option is (4).

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Answer:

correct option is (4).

Explanation:

Answer:

By definition, and this is what Avogadro's constant tells you, 1 mole of nickel must contain 6.022⋅1023 atoms of nickel.

Explanation:

In an ecosystem, plant tropism represented is phototropism  which is towards the direction of light.

Ecosystem is defined as a system which consists of all living organisms and the physical components with which the living beings interact. The abiotic and biotic components are linked to each other through nutrient cycles and flow of energy.

Energy enters the system through the process of photosynthesis .Animals play an important role in transfer of energy as they feed on each other.As a result of this transfer of matter and energy takes place through the system .Living organisms also influence the quantity of biomass present.By decomposition of dead plants and animals by microbes nutrients are released back in to the soil.

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The cars are hanging from cables so that there is presence of more medium of propagation to make it look real.

This is referred to as a violent propagating disturbance, produced by an explosion in air.

Hanging the cars in the air will ensure an accurate description of the effect of the blast wave on them.

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Answer:

What's surprising, however, is that a washing machine requires way less electricity than a dryer. An average cycle for a washing machine is 30 minutes. This appliance, which is a widely used Energy Star model, needs 500 watts per hour to run, which means it requires 250 Wh, or 2.25 kWh, to run for 30 minutes.

Answer:

[tex]I'm~here~to~help![/tex]

The correct option is B. Dryer, because a washing machine uses 1,200 or 3,000 watts on average, while a dryer uses 1,800 or 5,000 watts. That is a lot of watts!

The buffer that is adjusted to control acid-base balance is referred to as a bicarbonate buffer.

This consists of a weak acid and its conjugate base, or vice versa and resist changes in the pH of the solution.

The bicarbonate buffer is involved in acid-base homeostasis by removing CO2 and hydrogen ions, respectively, from the body.

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Answer:

types of elements nacl MGS

behavior shared between atoms tranferred from one to another

properties high melting poin low melting point

example SI-o metal + non metal

example H-H only non metal elements

Explanation:

Answer:

Dipole-dipole

- are the strongest intermolecular force of attraction.

Explanation:

Yun lang <3

Answer:

Explanation:

As the distance to the outermost electron of the Group 1 element increases, the amount of energy required to remove an electron decreases.

That's D

A: and C: are both incorrect for the same reason. Group 1 elements don't add electrons -- they try and give those electrons away.

B: all of the group one have only 1 valence electron,

Answer:

coefficients: 4, 3, 2

Explanation:

Denatured alcohol and isopropyl alcohol are as similar as they as different. They are both used for cleaning and harmful to people if ingested. But isopropyl seems to be more effective than denatured alcohol. Denatured alcohol has been found to be more toxic and can harm our skin. But when it comes to cleaning, denatured alcohol can be used, but should not be used over isopropyl as it can leave behind residue, especially when it comes to electronic devices. Isopropyl, especially 70%, is more effective because it has more water, which can help it dissolve more slowly, penetrate cells, and kill bacteria.

Answer:

Diagram Z

Explanation:

A cell placed into a hypotonic solution will swell and expand until it eventually burst through a process known as cytolysis.

Answer:

Diagram Y

Explanation:

Osmosis is the passive movement of water molecules across (into or out of) a cell membrane. "Passive" means that the process occurs automatically without the need for chemical energy.

In the diagrams above, a plant cell is shown as it would appear in a solution with a solute concentration more than its own (X), a solution with a solute concentration equal to its own (Y), and a solution with a solute concentration less than it own (Z). The movement of water is toward the area of more solute concentration (and therefore less water concentration).

The answer, then, is Diagram Y.

(Trust me, I just did it)

Answer:

A and B is the answer

Answer:

option b

Explanation:

Answer:

50000 seconds

Explanation:

Classic dimensional analysis question!

[tex]\frac{1000\text{km}}{20\text{m/s}} * \frac{1000\text{m}}{1\text{km}}=50000\text{s}[/tex]

Answer:

55 degrees F - cold water

120 degrees F

the last on I don't know

If 2500 grams of H2SO4 react with excess NH3 according to the illustration, the amount of ammonium sulfate that can be produced would be 3,370.92 grams. If only 3100 grams of ammonium sulfate were produced, the percentage yield would be 91.96%.

From the equation of the reaction:

2NH3(aq) + H2SO4(aq) → (NH4)2SO4(aq)

The mole ratio of H2SO4 and (NH4)2SO4 is 1:1

Mole of 2500 grams H2SO4 = 2500/98 = 25.51 moles

Equivalent mole of (NH4)2SO4 = 25.51 moles

Mass of 25.51 moles (NH4)2SO4 = 25.51 x 132.14 = 3,370.92 grams

If 3100 g of (NH4)2SO4 were actually produced, the percentage yield would be:

Percent yield = 3100/3370.92 x 100 = 91.96%

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Answer:

B. To make life easier.

Explanation:

Although all of the above makes sense, the answer should be B. because it is to help improve how we live.

I hope it helps! Have a great day!

Muffin~

The goal of technology is to make life easier.

A goal is "an idea of the future or desired result that a person or a group of people envision, plan and commit to achieve".

What is technology?

Technology is "the use of scientific knowledge for practical purposes or applications, whether in industry or in our everyday lives".

Hence, the goal of technology is to make our life better.

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In the RGB color model, each color is represented by a numerical code that is written in parentheses and separated by commas.

RGB is a color model with which it is possible to represent a color by mixing by adding the three primary colors of light.

A special feature of this model is that it is not a reference point for defining the color red, green, or blue because the same RGB values can display noticeably different colors on different devices.

To form a color, it must be taken into account that in the RGB model the incidence of each color (red, green or blue) is measured on a scale that goes from 0 to 255.

These values are represented in parentheses, separated by commas as shown in the image below:

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Answer:

To keep apparatus, chemicals and carry out experiments

Answer:

B. A gnat completes its life cycle in about 1 month.

Explanation:

Stage Time in Stage

egg 24 hours

larva 7 days

pupa 6 days

adult 2 weeks

Which of the following is a valid conclusion that Ivana can draw from her data?

A. Agnat generally does not live for more than 1 week.

B. Agnat completes its life cycle in about 1 month.

C. Agnat life cycle has more than five stages.

D. Agnat is a crustacean, not an insect.

Answer:

Brainliest Please !!!!!

Answer:

69.271837183727718371

Taking into account the Gay Lussac's law, the pressure in the backup tank at -183 °C is 270 mmHg.

Gay Lussac's law establishes the relationship between the temperature and pressure of a gas when the volume is constant.

This law says that the pressure of the gas is directly proportional to its temperature: when there is a constant volume, as the temperature increases, the pressure of the gas increases. And when the temperature is decreased, gas pressure decreases.

Mathematically, Gay-Lussac's law states that the ratio between pressure and temperature has the same value:

[tex]\frac{P}{T} =k[/tex]

Studying an initial state 1 and a final state 2, it is fulfilled:

[tex]\frac{P1}{T1} =\frac{P2}{T2}[/tex]

In this case, you know:

Replacing in the Gay-Lussac's law:

[tex]\frac{900 mH}{300 K} =\frac{P2}{90 K}[/tex]

Solving:

[tex]P2=90K\frac{900 mH}{300 K}[/tex]

P2=270 mmHg

Finally, the pressure in the backup tank at -183 °C is 270 mmHg.

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Answer:

0.17637 pounds

Explanation:

hope this help

The number of units of NaOH are in 80 grams is 12.046 x 10²³ Particles of NaOH.

The mole, symbol mol, is the SI base unit of amount of substance.

The quantity amount of substance is a measure of how many elementary entities of a given substance are in an object or sample.

Formula to calculate number of Particles when weight of the sample is given ;

N = given weight  / Molecular weight x Nₐ

   = 80 / 40 x 6.023 x 10²³ Particles

   =  12.046 x 10²³ Particles of NaOH

Hence, The number of units of NaOH are in 80 grams is 12.046 x 10²³ Particles of NaOH.

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A 1.50-L vessel is filled with helium at 25.0 °C and 3.04 atm. Under these conditions, the mass of helium is 0.744 g.

An ideal gas is that whose particles have negligible volume and intermolecular forces.

A 1.50 L vessel at 25.0 °C contains He at a pressure of 3.04 atm.

We will use the following expression.

K = °C + 273.15 = 25.0 + 273.15 = 298.2 K

We will use the ideal gas equation.

P × V = n × R × T

n = P × V / R × T

n = 3.04 atm × 1.50 L / (0.0821 atm.L/mol.K) × 298.2 K = 0.186 mol

The molar mass of He is 4.00 g/mol.

0.186 mol × 4.00 g/mol = 0.744 g

A 1.50-L vessel is filled with helium at 25.0 °C and 3.04 atm. Under these conditions, the mass of helium is 0.744 g.

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Answer:

See below ↓↓↓

Explanation:

Helminths = 1 Most Difficult

Fungi = 2 Moderately Difficult [Option not given, but 2 is right answer]

Bacteria = 3 Least Difficult

Answer:

Palmas, because more energy is transferred from the sun directly to the surface and then from the surface to the air.

Explanation:

Hope this helps:)....if not then sorry for wasting your time and may God bless you:)

The formulas for the substances and designate their physical states as follows:

a. nitrogen dioxide gas NO₂(g)

b. liquid gallium  GA (I)

c. barium chloride dissolved in water BaCI₂ (aq)

d. solid ammonium carbonate (NH₄) 2CO₃ (s)

The term chemical formula is defined as an expression that presents the elements in a compound and the relative proportions of those elements.

If only one atom of a particular type is present, no subscript is used. For atoms that have two or more of a particular type of atom present, a subscript is written after the symbol for that atom.

It presents the constituent element and the number of atoms of each element present in one molecule of the compound. It also corresponds to the molecular mass of the compound.

Thus, The formula of nitrogen dioxide gas is NO₂(g).

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