How many grams of O, can be prepared from the thermal decomposition of 0.928 kg of HgO? 0 :02 In a combination reaction, 2.85 g of magnesium is heated with 6.38 g of nitrogen. How many moles of product are formed? Assume the reaction goes to completion. 11 mol

Answer:

c = 0.0432moldm ^−3

Explanation:

The first step would be to find the molar ratio in the reaction. Now generally, one can simplify strong acid-strong base reaction by saying:

Acid+Base ->Salt+ Water

Answer:

14.99 mols of CO2

Explanation:

STP= 273 k , 1 atm , .0821 gas constant

N=PV/RT

N= 1x336/.0821x273

14.99 mols of CO2

659.6 grams of CO2

Answer:

A polypeptide chain!

Explanation:

Hopefully this helps! If this wasn't the answer you were looking for please don't hesitate to comment here or private message me! Have a nice day/night! :))

Amino acids are the fundamental building blocks of proteins. In the cell, amino acid molecules combine to form polypeptide chain or protein.

The term amino acids are defined as the building block of the protein. Amino acids are the fundamental building blocks of proteins. Their molecule contains both an amino and a carboxylic group.

Alpha-amino acids are amino acids that have an amino and a carboxyl group attached to the same carbon atom, i.e., an alpha-carbon atom. Glycine, Alanine, etc.

Proteins are made up of monomers called amino acids. A protein is composed of one or more linear chains of amino acids, each of which is referred to as a polypeptide.

Thus, In the cell, amino acid molecules combine to form polypeptide chain or protein.

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Answer:

  about 36.10 g

Explanation:

The proportion of interest is ...

  mass/atoms = x/(1.810·10^24) = (12.0107 g)/(6.02214076·10^23)

Multiplying by 1.810·10^24, we find the mass of the sample to be ...

  x = 36.0991 g

The mass of the sample is about 36.10 grams (to 4 s.f.).

Answer:

Answer: When 20 grams of potassium chlorate, KClO3, is dissolved in 100 grams of water at 80 ºC, the solution can be correctly described as:, unsaturated

At approximately what temperature does the solubility of sodium chloride, NaCl, match the solubility of potassium dichromate, K2Cr2O7?, 60 ºC

Explanation:

4 atoms of carbon react with one molecule of S8 to give 4 molecules of CS2 :  ; Carbon and S8 are reactants while CS2 is product ; 4 moles of carbon reacts with 1 mole of S8 to give 4 moles of CS2.

A balanced equation is an equation of a chemical reaction in which the number of atoms for each element in the reaction and the total charge is  same for reactants and the products.

Balanced equation is a chemical equation in which mass is conserved and each side of the equation has same number of atoms of each element.

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In this scenario, the correct answer is D) increase the temperature.

To increase the value of K for the exothermic reaction 2H₂(g) + O₂(g) ↔ H₂O(g), we should:

D) Increase the temperature.

The equilibrium constant, K, represents the ratio of the concentrations of products to reactants at equilibrium. For an exothermic reaction, increasing the temperature causes the equilibrium to shift in the direction that consumes heat, which, in this case, is the forward reaction. By Le Chatelier's principle, increasing the temperature will favor the endothermic reaction to absorb the additional heat, leading to an increase in the concentration of products and an increase in the value of K.

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Answer:

22.4 L

Explanation:

The answer is true, yw.

Coniferous forests grow in a wide range of climates, from the coldest polar regions to the warmest tropical regions and everything in between. This statement is true.

Conifers are  a type of gymnosperm plants bearing cone like structures in which the seeds are located. Don't be fooled by the fact that coniferous woods are widespread around the world. Some of the wildest trees in the world can be found there.

Hyperion, a coastal redwood tree, is the tallest tree in the world, reaching a height of 379 feet, equivalent to a 35-story structure. From Siberia to Canada, coniferous rainforest biomes can be found. They have cold winters and warm to hot summers.

Temperatures in coniferous forests are quite low all year long. Summertime temperatures range from -7°C to 21°C, while the average wintertime temperature ranges from -54°C to -1°C. Hence, the statement is true.

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Calcium chloride reacts with the fatty acid salt to form a calcium soap (Ca(RCOO)2) precipitate and the corresponding metal chloride (M+Cl-).

When CaCl2 (calcium chloride) reacts with a soap, which is typically a sodium or potassium salt of a fatty acid, the reaction results in the formation of a precipitate called calcium soap.

Let's represent the fatty acid salt as RCOO- M+ (where R is the hydrocarbon chain, M+ is the metal cation like Na+ or K+).

The balanced equation for this reaction is:

CaCl2 (aq) + 2 RCOO- M+ (aq) → Ca(RCOO)2 (s) + 2 M+Cl- (aq)

In this equation, calcium chloride reacts with the fatty acid salt to form a calcium soap (Ca(RCOO)2) precipitate and the corresponding metal chloride (M+Cl-).

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Answer:

I don't know the answer sorry

Peaks in the Infrared (IR) and Carbon-13 Nuclear Magnetic Resonance (CNMR) spectra can suggest that a rearrangement has occurred within a molecule. Let's discuss how these techniques can provide evidence for rearrangement:

1. IR Spectroscopy: This technique identifies functional groups in a molecule by measuring the vibrational frequencies of chemical bonds. When rearrangement occurs, the IR spectrum will show changes in the peak positions or intensities due to altered bonding environments. For example, if a carbonyl group shifts from a ketone to an ester, you would observe a change in the carbonyl stretching frequency (from around 1710 cm⁻¹ for a ketone to around 1735 cm⁻¹ for an ester).

2. CNMR Spectroscopy: This technique provides information about the carbon atoms in a molecule by measuring their magnetic resonance. When a rearrangement occurs, the CNMR spectrum will show changes in the peak positions (chemical shifts) due to altered electronic environments of the carbon atoms. For example, if a methyl group moves from an alkyl to a carbonyl carbon, its chemical shift would change significantly (from around 10-20 ppm for an alkyl carbon to around 50-60 ppm for a carbonyl carbon).

In summary, peaks in IR and CNMR spectra can suggest that a rearrangement has occurred by showing changes in the vibrational frequencies of functional groups and the chemical shifts of carbon atoms, respectively. These changes indicate altered bonding environments, which provide evidence for the rearrangement within the molecule.

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Answer:

8.31 KPa.L/Kmol

Explanation:

From the question given above, the following data were obtained:

Pressure = 101.3 KPa

Temperature (T) = 0 °C = 273 K

Number of mole (n) = 1 mole

Volume = 22.4 L

Gas constant (R) =?

The gas constant can be obtained as follow:

PV = nRT

101.3 × 22.4 = 1 × R × 273

2269.12 = R × 273

Divide both side by 273

R = 2269.12 / 273

R = 8.31 KPa.L/Kmol

Therefore, the value of the gas constant is 8.31 KPa.L/Kmol

The mass of nitrogen gas in the sample is 0.001355 g and the number of molecules of nitrogen gas in the sample is 2.91 x 10¹⁹ molecules.

At STP (Standard Temperature and Pressure), the temperature is 0°C (273.15 K) and the pressure is 1 atm (101.325 kPa).

Ideal gas law is: PV = nRT

Where P will be the pressure, V will be the volume, n is number of moles, R is the ideal gas constant, and T will be the temperature.

At STP, the value of R is 0.0821 L·atm/mol·K.

The volume of the nitrogen gas sample is 1120 cm³, which is equivalent to 0.00112 m³.

Using the ideal gas law;

n = PV/RT

n = (1 atm) x (0.00112 m³) / (0.0821 L·atm/mol·K x 273.15 K)

n = 0.0000483 moles of nitrogen gas

To calculate the mass of nitrogen gas, we use the molar mass of nitrogen, which is 28.02 g/mol.

Mass of nitrogen gas = n x molar mass

Mass of nitrogen gas = 0.0000483 moles x 28.02 g/mol

Mass of nitrogen gas = 0.001355 g

To calculate the number of molecules of nitrogen gas in the sample, we use Avogadro's number, which is 6.022 x 10²³ molecules/mol.

Number of molecules of nitrogen gas = n x Avogadro's number

Number of molecules of nitrogen gas = 0.0000483 moles x 6.022 x 10²³ molecules/mol

Number of molecules of nitrogen gas = 2.91 x 10¹⁹ molecules

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Answer:

I'm pretty sure it's body repair But it also maybe energy

Explanation:

Answer: A.

Explanation:

the science or study of how man and animals perform tasks and solve certain types of problems involving use of the body.

Hope this helps!....(bruh this was tuff)

Answer: Reactants → Products

Explanation: A chemical equation is a symbolic representation of a chemical reaction, showing the reactants on the left-hand side, separated by an arrow, and the products on the right-hand side. For example, the equation for the combustion of methane (CH4) would be written as:

CH4 + 2O2 → CO2 + 2H2O

Where CH4 and O2 are the reactants and CO2 + 2H2O are the products.

The formal charge of nitrogen atom that has no lone pairs and forms two double bonds is -3.

The formal charge of an atom is the difference between the number of valence electrons of an atom in its free state as well as the number of electrons assigned to that atom in a molecule.

For nitrogen (N), the number of valence electrons in its free state will be 5. In a molecule where it forms two double bonds, nitrogen will share a total of 8 valence electrons (4 from each bond) with other atoms. Therefore, the number of electrons assigned to nitrogen is 8.

To calculate the formal charge of nitrogen in this case, we can use the formula: Formal charge = valence electrons - assigned electrons

Substituting the values for nitrogen, we get:

Formal charge of nitrogen = 5 - 8 = -3

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Answer:

I think its city y, I don't know if its right though.

Explanation:

Answer:What happens to the temperature of a substance during a phase change? Why does this happen?

Explanation:During a phase change the temperature remains constant. This is because the heat supplied to change the state of matter is used in breaking the intermolecular forces and other attractive forces. Therefore, the temperature remains constant as no heat is absorbed or released.

Answer:

'Red shift' is a key concept for astronomers. The term can be understood literally - the wavelength of the light is stretched, so the light is seen as 'shifted' towards the red part of the spectrum.

Something similar happens to sound waves when a source of sound moves relative to an observer. This effect is called the 'Doppler effect' after Christian Andreas Doppler, an Austrian mathematician who discovered that the frequency of sound waves changes if the source of sound and the observer are moving relative to each other.

If the two are approaching, then the frequency heard by the observer is higher; if they move away from each other, the frequency heard is lower.

There are many everyday examples of the Doppler effect - the changing pitch of police and ambulance sirens, or train whistles and racing car engines as they pass by. In every case, there is an audible change in pitch as the source approaches and then passes an observer.

Everyone has heard the increased pitch of an approaching police siren and the sharp decrease in pitch as the siren passes by and recedes. The effect arises because the sound waves arrive at the listener's ear closer together as the source approaches, and further apart as it recedes.

Light behaves like a wave, so light from a luminous object undergoes a Doppler-like shift if the source is moving relative to us. Ever since 1929, when Edwin Hubble discovered that the Universe is expanding, we have known that most other galaxies are moving away from us. Light from these galaxies is shifted to longer (and this means redder) wavelengths - in other words, it is 'red-shifted'.

Since light travels at such a great speed relative to everyday phenomena (a million times faster than sound) we do not experience this red shift in our daily lives.

The red shift of a distant galaxy or quasar is easily measured by comparing its spectrum with a reference laboratory spectrum. Atomic emission and absorption lines occur at well-known wavelengths. By measuring the location of these lines in astronomical spectra, astronomers can determine the red shift of the receding sources.

However, to be accurate, the red shifts observed in distant objects are not exactly due to the Doppler phenomenon, but are rather a result of the expansion of the Universe.

Doppler shifts arise from the relative motion of source and observer through space, whereas astronomical redshifts are 'expansion redshifts' due to the expansion of space itself.

Two objects can actually be stationary in space and still experience a red shift if the intervening space itself is expanding.

A convenient analogy for the expansion of the Universe is a loaf of unbaked raisin bread. The raisins are at rest relative to one another in the dough before it is placed in the oven. As the bread rises, it also expands, making the space between the raisins increase.

If the raisins could see, they would observe that all the other raisins were moving away from them although they themselves were stationary within the loaf. Only the dough - their 'Universe' - is expanding.

Answer:

there is one carbon atom and there are two oxygen atoms. So, in total there are three atoms.

Explanation:

Answer:

14

Explanation:

Absorbance in UV-vis spectroscopy is a dimensionless quantity and does not have any units associated with it. Therefore, the correct answer is that absorbance has no units.

In UV-vis spectroscopy, absorbance is a logarithmic measure of the amount of light absorbed by a sample at a specific wavelength. It is calculated using the formula A = log10(I0/I), where I0 is the intensity of the incident light and I is the intensity of the transmitted light. The absorbance value provides information about the concentration or molar absorptivity of the absorbing species in the sample.

The use of absorbance, which is a dimensionless quantity, allows for easier comparison and interpretation of data across different wavelengths and instruments. It is a relative measure that describes the fraction of light absorbed by the sample. By measuring the absorbance at different wavelengths, a UV-vis spectrum can be obtained, which provides valuable information about the electronic structure and composition of the sample.

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Answer:

So, to determine the number of neutrons in atom, we only have to subtract the number of protons from the mass number. # of neutrons = Mass Number - Number of Protons To be able to apply this formula, refer to the atomic number and atomic weight of the elements. These two are listed in the Periodic Table of Elements.

Explanation:

I'm new to brainly so I hope this helped

The emission of light with the longest wavelength occurs when an electron transitions from a higher energy level to a lower energy level.

In general, for a hydrogen-like atom, the energy levels are given by the equation:

E = -13.6 eV/n²

where E is the energy, n is the principal quantum number, and -13.6 eV is the ionization energy of hydrogen.

To find the two values of n1 and n2 that correspond to the longest wavelength, we need to consider the transition where n1 is the higher energy level and n2 is the lower energy level. Since longer wavelengths correspond to smaller energy differences, we are looking for the smallest energy difference between two energy levels.

The smallest energy difference occurs when n2 is the lowest possible value (n2 = 1) and n1 is the next higher value (n1 = 2).

Therefore, the two values of n1 and n2 for the emission of light with the longest wavelength would be n1 = 2 and n2 = 1.

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The disturbances needed to shift the reaction to the right, according to Le Chatelier's Principle, are to increase the concentration of Fe3+ (aq), decrease the concentration of Fe(SCN)2 (aq), increase the concentration of SCN- (aq), and decrease the concentration of Fe(aq). Le Chatelier's Principle states that if a chemical reaction is at equilibrium, any disturbance that occurs in the reaction will be compensated by a shift in the equilibrium in the opposite direction so as to re-establish the equilibrium. In this case, the reaction is Fe3+ (aq) + SCN- (aq) = Fe(SCN)2 (aq).

In order to shift the reaction to the right (i.e. increase the amount of products) the following disturbances must occur: increase the concentration of Fe3+ (aq), decrease the concentration of Fe(SCN)2 (aq), increase the concentration of SCN- (aq), and decrease the concentration of Fe(aq). Any other disturbance will not have an effect on the reaction, as it is already at equilibrium

The rationale behind these disturbances is that they are all designed to increase the amount of reactants. An increase in the concentration of Fe3+ (aq) will provide more of the reactant needed to produce the product, while a decrease in the concentration of Fe(SCN)2 (aq) will reduce the amount of the product and thus drive the reaction towards the reactants.

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Answer:

Coffeicent

Explanation:

I think this would help you

Answer:

The reason is carbon's ability to form stable bonds with many elements, including itself. 

Explanation:

This property allows carbon to form a huge variety of very large and complex molecules. In fact, there are nearly 10 million carbon-based compounds in living things!

Answer:

Explanation:

The reason is that carbon is able to form stable bonds with many elements, including itself, which allows carbon to form a huge variety of very large and complex molecules.

The molecular formula of the compound which has a molecular weight of 112.124 atomic mass units is C₆H₈O₂.

Molecular formula of any compound tells about the composition and numbers of each entities present in that molecule.

Steps involved in the prediction of molecular formula:

      Molar mass of C₃H₄O = 3(12) + 4(1) + 16 = 56

        112.124/56 = 2

        Molecular formula = (C₃H₄O)₂ = C₆H₈O₂

Hence correct option is (E).

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