Which of the following is not a gas in the Earth's atmosphere? A. oxygen B. carbon dioxide C. sulfur D.nitrogen 1​

Answer:

Rubidium Chloride is an excellent water soluble crystalline Rubidium source for uses compatible with chlorides.

Compound Formula: ClRb

Melting Point: 715 °C

Boiling Point: 1,390 °C

Explanation:

Based on the given graph, the concentration of species A is plotted as a function of time. The slope of the graph represents the rate of reaction of A, which is changing as the reaction progresses. Therefore, the concentration of species A is plotted in the given graph.

The slope of a graph representing the change in concentration of a species over time in a chemical reaction represents the rate of reaction of that species.

Can we determine the concentrations of all the species in a chemical reaction based on a graph of the change in concentration of one species over time?

No, we cannot determine the concentrations of all the species in a chemical reaction based on a graph of the change in concentration of one species over time.

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The average bond enthalpy, in kJ/mol, of an oxygen-oxygen bond in O\(_3\) is 889.5kJ/mol. Bond enthalpy, sometimes referred to as binding energies.

Bond enthalpy, sometimes referred to as binding energies, is a number that sheds light on the potency and, consequently, the stability of a chemical bond. The total energy required for breaking 1 mole of a chemical bond is known as that of the bond enthalpy of the that chemical bond.

2O\(_3\)(g) → 3O\(_2\), ΔH=-285 kJ/mol

enthalpy of reaction = 3×bond enthalpy of O\(_2\) - 2×bond enthalpy of O\(_3\)

-285 =3×498 - 2×bond enthalpy of O\(_3\)  

-285 = 1494- 2×bond enthalpy of O\(_3\)  

-285-1494= - 2×bond enthalpy of O\(_3\)  

-1779 = - 2×bond enthalpy of O\(_3\)  

bond enthalpy of O\(_3\) =1779/2=889.5kJ/mol

Therefore, the average bond enthalpy, in kJ/mol, of an oxygen-oxygen bond in O\(_3\) is 889.5kJ/mol.

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The filtrate in a gravimetric analysis of the phosphate experiment is expected to be acidic due to the reactions of NH4OH and NH4+ with any acidic species in the solution.

Gravimetric analysis is a quantitative analytical technique used in chemistry to determine the amount of a substance by weighing a sample of that substance. The principle behind the gravimetric analysis is that the mass of a substance can be used to calculate its quantity, and by measuring the mass change of a sample before and after a reaction or a purification process, the amount of a particular constituent can be accurately determined.

This method involves the preparation of a solution containing the analyte (the substance to be measured), followed by a precipitation reaction or a volatilization process that will separate the analyte from the sample matrix. The separated analyte is then collected, washed, and dried, and its mass is determined using a sensitive balance.

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Answer:

The thermal decomposition of ammonium nitrate to produce dinitrogen monoxide and water. This reaction takes place at a temperature of 200-260°C.

Answer:

Radiation isn't beneficial to society .Radiation damages the cells that make up the human body. Low levels of radiation are not dangerous, but medium levels can lead to sickness, headaches, vomiting and a fever. High levels can kill you by causing damage to your internal organs. It's difficult to treat high radiation exposure.

Explanation:

Exposure to very high levels of radiation, such as being close to an atomic blast, can cause acute health effects such as skin burns and acute radiation syndrome (“radiation sickness"). It can also result in long-term health effects such as cancer and cardiovascular disease.

Radiation is both harmful and beneficial, but when we analyse it is found that harms overweight benefits. Radiation can be used as a form of energy (in nuclear plants), but an accident or malfunction in it can lead to death and injury of humans. Also, it is really difficult to dispose the used devices.

To determine the calorific values of two different types of fuel safely, follow these steps:

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A substance that is impenetrable by x-rays is described as being radiopaque.

Radiopaque substances will not allow x-rays and or other forms of radiations to pass through them.

Instead, they absorb or block the rays and when used in radiology, they appear white or light gray on photographic films.

Radiopaque materials are applied in generating ultrasound images and other forms of clinical procedures.

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The result of the exponential function 2(2)+1/2^17203 is 4.

Power operation or an exponent function is a positive or negative number placed above and to the right of a quantity.

The given exponential function can be calculated as follows;

2(2) + 1/2^(17203)

first solve for 2(2);

2(2) = 2 x 2 = 4

second solve for 1/2^(17203);

1/2^(17203) ≈ 0

Add first solution and second solution together;

4 + 0 = 4

Thus, the result of the exponential function 2(2)+1/2^17203 is 4.

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Explanation:

Density of object = gram/volume

= 100 g/ 5 cm³

= 20 g/cm³

The density of an object that is 100 grams and has a volume of 5 cubic centimeters is 20 g/cm³.

Density of any object will be calculated by using the below equation:

ρ = m/V, where

m = mass of object = 100g

V = volume of object = 5 cm³

On putting values we get,

ρ = 100/5 = 20 g/cm³

Hence required density is 20 g/cm³.

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The Tyndall effect can be used to detect whether an unknown sample is a suspension, colloid, or homogeneous solution.

Light can always travel through a solution, and there is never any general light scattering. Between solutions and suspensions, a colloid exists. By diffusing the incoming light, it produces the Tyndall effect. A suspension is hazy and contains visible suspended particles. The suspensions obstruct the passage of light.

A combination that is heterogeneous and has some of its particles settle out as it stands is called a suspension. Therefore, if a beam of light is passed through your sample and it scatters, it is either a suspension or a colloid. It is a solution if it doesn't scatter.

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Magnesium and calcium are 2nd group elements with 2 valence electrons. They are metals in room temperature and easily lose these electrons to nonmetals such as oxygen.

Magnesium is 12th element in periodic table. It is 2nd group element and is a called alkaline earth metals. Its group members are calcium, strontium, and barium.

They contains 2 valence electrons which can be easily lost to a non-metal. Oxygen is highly electronegative element and it contains 6 valence electrons and need two more electrons to achieve octet.

Al is 13th group element it is not as much electropositive as alkaline earth metals. It contains 3 valence electrons and thus it need to lose all these 3 electrons to achieve octet. Hence, Al is less reactive towards O2 in comparison with Mg and Ca.

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Ubiquinone (also known as coenzyme Q) can carry two electrons from Complex I and Complex II of the electron transport chain (ETC) and delivers them to Complex III.

Cytochrome C can carry one electron from Complex III and delivers it to Complex IV of the ETC.

The electron transport chain (ETC) is a series of protein complexes located in the inner mitochondrial membrane that transfer electrons from electron donors to electron acceptors, generating a proton gradient that is used to generate ATP. Two important components of the ETC are ubiquinone and cytochrome C.

Ubiquinone (Q) can carry two electrons from Complex I (NADH dehydrogenase) and Complex II (succinate dehydrogenase) of the ETC and delivers them to Complex III (cytochrome bc1 complex).

Ubiquinone is lipid-soluble and mobile within the inner mitochondrial membrane, shuttling electrons from Complex I and Complex II to Complex III. As electrons are transferred through the complexes, protons are pumped out of the mitochondrial matrix, generating a proton gradient that is used to drive ATP synthesis.

Cytochrome C is a small, soluble protein that can carry one electron from Complex III to Complex IV (cytochrome c oxidase). The transfer of electrons from cytochrome C to Complex IV generates additional proton pumping, further contributing to the proton gradient that drives ATP synthesis.

In summary, ubiquinone carries two electrons from Complex I and II and delivers them to Complex III, while cytochrome C carries one electron from Complex III and delivers it to Complex IV. These transfers of electrons are important for generating the proton gradient that drives ATP synthesis in the electron transport chain.

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The mass of sodium present in 15.0 mL of blood drawn from the patient is 47.2 g.

\(15.0 \, \text{mL} = 15.0 \, \text{mL} / 1000 \, \text{mL/L} = 0.015 \, \text{L}\)

\(\text{Number of moles of sodium in 1 L} = \text{Molarity} \times \text{Volume of solution in L}\)

\(\text{Number of moles of sodium in 1 L} = 137 \, \text{mmol/L} \times 1 \, \text{L} = 137 \, \text{mmol}\)

\(\text{Number of moles of sodium in 0.015 L} = 137 \, \text{mmol/L} \times 0.015 \, \text{L} = 2.055 \, \text{mmol}\)

\(\text{Mass of sodium} = \text{Number of moles} \times \text{Molar mass}\)

\(\text{Mass of sodium} = 2.055 \, \text{mmol} \times 22.99 \, \text{g/mol} = 47.2 \, \text{g}\)

The mass of sodium present in the 15.0 mL of blood drawn from the patient is 47.2 g.

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Answer:

Based on the experiment described, the black can could absorb more radiation and ended up hotter than the silver can. This is due to the difference in their ability to absorb and reflect light.

Explanation:

The black can absorbed more light because it has a high absorbance coefficient for visible light, meaning it can absorb a greater amount of photons than the silver can. On the other hand, the silver can has a high reflectance coefficient for visible light, meaning it can reflect a greater amount of photons.

When the heating lamp was placed over both cans, the black can absorb more photons of the light, and therefore absorbed more energy. This increase in energy leads to an increase in temperature, while the silver can reflected more photons, absorbing less energy and resulting in a lower temperature. This is supported by the observation that the black can ended up getting hotter.

Answer:

The correct answer is 7.1 degree C.

Explanation:

Based on the given information, the initial temperature or To of the block is 23.4 degree C.  

The energy lost or Q from the given wooden block is -759 J.  

The specific heat capacity or c of the wood given is 1.716 J/g°C

The mass of the wooden block given is 27.2 grams.  

There is a need to find the final temperature of the wooden block, for this the formula to be used is,  

Q = m × c × (T-To)

Now by putting the given values in the formula we get,  

-759 = 27.2 × 1.716 (T - 23.4)

T = 7.1 degree C.  

It is important to note that without additional information about the specific chemicals in containers A and B, we cannot determine their identities with certainty.

1. When the sample from container A dissolved, the temperature of the solution decreased by 0.02°C. This indicates an endothermic reaction, where heat is absorbed from the surroundings.
2. When the sample from container B dissolved, the temperature increased by 0.58°C. This indicates an exothermic reaction, where heat is released to the surroundings.

Based on these observations, we can conclude that the chemical in container A is likely an endothermic substance that absorbs heat from its surroundings when it dissolves. Conversely, the chemical in container B is likely an exothermic substance that releases heat to its surroundings when it dissolves.

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To ensure that all of the Fe3+ has been converted to Fe(SCN)2+, you can add an excess of SCN- to the reaction mixture. This will shift the equilibrium towards the formation of Fe(SCN)2+ and ensure that all of the Fe3+ has reacted.

One way to do this is to start with a known amount of Fe3+ and add an excess of SCN-. The excess SCN- will ensure that all of the Fe3+ is converted to Fe(SCN)2+. The excess SCN- can then be removed by adding a metal ion such as Fe3+, which will react with the excess SCN- to form a colored product that can be removed by filtration or centrifugation. The resulting solution will contain only Fe(SCN)2+ at known concentrations, which can be used to prepare a standard curve.

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The number of atoms in 0. 50 moles of zinc is 3.01 x 10 ²³

The number of atoms in one particular carbon isotope, carbon-12, serves as the basis for the idea of the "mole." A mole of carbon atoms, or 6.02 10²³ carbon atoms, can be found in 12g of carbon-12.

The remaining atoms on the periodic table are identified by their molar masses, which indicate how many grams of each are required to make a mole, or 6.02 x 10 ²³atoms, of that element.

Zinc will have 6.02 x 10²³ if it has 1 mole of zinc. In chemistry, we love to cancel units, therefore we simply do so to address your issue.

The number of atoms in one particular carbon isotope, carbon-12, serves as the basis for the idea of the "mole." A mole of carbon atoms, or 6.02 10 23 carbon atoms, can be found in 12g of carbon-12.

The remaining atoms on the periodic table are identified by their molar masses, which indicate how many grams of each are required to make a mole, or 6.02 10 23 atoms, of that element.

Zinc will have 6.02 x 10 ²³ if it has 1 mole of zinc. In chemistry, we love to cancel units, therefore we simply do so to address your issue.

number of Zinc atoms= 0.50 moles x 6.02 x 10 ²³ = 3.01 x 10 ²³

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Answer:

55% plasma, 45% formed elements.

Explanation:

Hope this helps!

Answer:

3 then 4 then 5 then 1 then 2

Explanation:

ordering 1 through 5 from top to bottom

The correct order of igneous rock can form at Mauna Loa is as follows:

3Rock beneath Mauna Loa melts to form magma.

4 Melted rock rises toward Earth's surface.

5 Lava erupts from Mauna Loa and flows down the volcano.

1 Lava flowing down the volcano enters the Pacific Ocean.

2 Ocean water cools the lava, causing it to crystallize and form igneous rock.

Igneous rocks are the form when hot, molten rock crystallizes and solidifies. Igneous rock is produced through the cooling and solidification of magma or lava.

Igneous rocks produce when magma from inside the Earth moves toward the surface, or is forced above the Earth's surface as lava and ash by a volcano.

Thus, The correct order of igneous rock can form at Mauna Loa is 3, 4, 5, 1, and 2.

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Answer:

B. 6

Explanation:

Isotope given:

                      ¹⁴₆C

In specie written as this;  

  Superscript  = Mass number

  Subscript  = Atomic number

To find the protons, it is the same as the atomic number;

               Protons  = Atomic number  = 6

Neutrons have no charges;

Neutrons  = Mass number - Atomic number  =

 Neutrons  = 14 - 6  = 8

The number of electrons is the same as the atomic number = 6

Between OH and C=O, the strong nucleophile is OH and the strong electrophile is C=O.

1. OH (hydroxide ion) is a strong nucleophile because it has a negative charge on the oxygen atom, which allows it to donate its lone pair of electrons to an electrophilic center.
2. C=O (carbonyl group) is a strong electrophile because the carbon atom has a partial positive charge due to the electronegativity difference between carbon and oxygen atoms in the double bond. This makes the carbon atom highly susceptible to nucleophilic attack.

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Answer:

Answer is C,

Explanation:

It diminished local resources, decreasing the population.

In the compound Li2X, there are two lithium ions and one X^2- ion.

Ionic compounds are composed of an ion pair of opposite charge. Usually, the positive ion is a metal cation while the negative ion is a non metal anion. The two ions are held together by strong electrostatic interaction.

In the compound Li2X, there are two lithium ions and one X^2- ions. X^2 -is the  non metal anion present.

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The unique structure and chemical composition of individual organelles in plant and animal cells allow them to perform distinct functions within the cell. Large, round, water-filled sacs in the cytoplasm that function as the storage areas of the cell are known as Vacuole.

A Vacuole is the inside structure of cell that contains fluids in the cytoplasm . Vacuole helps to maintain the water balance. Its shape is round and found in both eukaryotes and prokaryotes. there are four types of vacuole:

Thus, The unique structure and chemical composition of individual organelles in plant and animal cells allow them to perform distinct functions within the cell. Large, round, water-filled sacs in the cytoplasm that function as the storage areas of the cell are known as Vacuole.

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Therefore, the mass of the resulting material (water) is 1,901.31 grams.

When hydrogen gas and oxygen are combined, they react to form water. The balanced chemical equation for this reaction is 2H2 + O2 → 2H2O. This means that two molecules of hydrogen gas react with one molecule of oxygen gas to form two molecules of water.
To determine the mass of the resulting material, we need to calculate the mass of water that is produced. From the balanced chemical equation, we know that two molecules of water are produced for every two molecules of hydrogen gas and one molecule of oxygen gas. Therefore, the amount of water produced will be equal to the amount of hydrogen gas used, since there is twice as much hydrogen gas as oxygen gas.
To calculate the mass of water produced, we need to convert the mass of hydrogen gas used to moles using the molar mass of hydrogen (1.008 g/mol), and then use the mole ratio from the balanced chemical equation to determine the moles of water produced. Finally, we can convert the moles of water produced back to grams using the molar mass of water (18.015 g/mol).
So, the calculation is as follows:
- Convert mass of hydrogen gas to moles: 212.56 g H2 ÷ 2.016 g/mol = 105.51 mol H2
- Determine moles of water produced: 105.51 mol H2 × 2 mol H2O ÷ 2 mol H2 = 105.51 mol H2O
- Convert moles of water to grams: 105.51 mol H2O × 18.015 g/mol = 1,901.31 g H2O

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Answer:

catalyst

Explanation:

Answer:

The reaction 6CO2 + 6H2O ---> C6H12O6 + 6O2 is the chemical equation for photosynthesis. In this reaction, carbon dioxide and water

Explanation:

give me brainlest please

Answer:

D

Explanation:

it seems the most logical

Answer:

B

Explanation:

6.00 ml

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