Please help!!

What colors do acids and bases turn litmus paper?

Answer:

The molar mass of gas Q is 43.923 g/mol

Explanation:

The given volume of ethane gas that diffuses through a porous plug in 100 seconds = 100 cm³

Therefore;

The rate of diffusion of ethane gas through the porous plug, \(v_{ethane}\), is given as follows;

\(v_{ethane}\) = (100 cm³/100 s) = 1 cm³/s

The molar mass of ethane, C₂H₆ = 2×12 g/mol + 6×1 g/mol = 30 g/mol

The given volume of gas, Q, that diffuses through a porous plug in 121 seconds = 100 cm³

∴ The rate of diffusion of the gas, Q, \(v_Q\) = 100/121 cm³/s

Graham's Law of diffusion states that the rate of diffusion of a gas is inversely proportional to the square root of the molecular mass of the gas

Mathematically, we have;

\(\dfrac{v_A}{v_B} =\sqrt{\dfrac{m_B}{m_A} }\)

Where;

\(v_A\) = The rate of diffusion of gas A

\(v_B\) = The rate of diffusion of gas B

\(m_A\) = The molar mass of the gas A

\(m_B\) = The molar mass of the gas B

Therefore, for ethane and gas Q, measured under the same condition, we have;

\(\dfrac{v_{ethane}}{v_Q} =\sqrt{\dfrac{m_Q}{m_{ethane}} }\)

\(\dfrac{1 \ cm^3/s}{\dfrac{100}{121} \ cm^3/s} =\sqrt{\dfrac{m_Q}{30 \ g/mol} }\)

\(m_Q = \left ({\dfrac{121}{100} } \right) ^2 \times 30 \ g/mol = 43.923 \ g/mol\)

The molar mass of gas Q, \(m_Q\) = 43.923 g/mol.

Answer:

Explanation:

This is lechatlier's principle, which basically talks about how adding or taking away things will disrupt equilibrium and the system will act a certain way to restore equilibrium

1. adding NH3 causes the equilibrium to shift left - produce more reactants

2. removing N2 causes the equilibrium to shift left - produce more reactants

3.  same as number 2

4. decreasing pressure causes equilbrium to shift to the side with more moles so it shifts left and produces more reactants

5. catalyst doesn't change anything about equlibrium, it only affects the reaction's rate

Le Chatelier's principle is a principle which predicts the effect of change in condition on a the position of a equilibrium.  

Change could be in Temperature, Moles(Concentration), Pressure.

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We could change the temperature by increasing or decreasing it, and there are two types of reactions, endothermic or exothermic, both have different outcomes by changing the condition.

__________________________________________________________

In Endothermic,

When we increase the temperature, It will favor the formation of product thus MORE PRODUCT will be formed - equilibrium will shift towards right i.e. product side.

When we decrease the temperature, It will favor the formation of reactants thus MORE reactant will be formed - equilibrium will shift towards left i.e. reactants side.

__________________________________________________________

In Exothermic,

When we increase the temperature, It will favor the formation of reactants thus MORE REACTANT will be formed - equilibrium will shift towards left i.e. reactants side.

When we decrease the temperature, It will favor the formation of product thus MORE PRODUCT will be formed - equilibrium will shift towards the right i.e. product side

When we increase the pressure, The equilibrium shifts towards the fewer moles of a gas. Wherever there are less moles, it could be any, reactant or product, the increase of Pressure will favor in formation of them.

When we decrease the pressure, The equilibrium shifts towards the more moles of a gas. So whether reactants or product have the higher moles, the decrease in pressure will favor in the formation of them.

When we increase the concentration of moles of any substance, The equilibrium will shift away from that substance. So if we want to make more product and there are more moles of reactant present, then Increase the concentration of reactants.

When we decrease the concentration of any substance, The equilibrium will shift towards that substance. So if we want to make more product, decrease its concentration or add more reactant.

By the use of the catalyst, There is no effect on the equilibrium. The rate of  both forward and backward reaction are increased with the equal amount.

By keeping that in mind,

A) Extra \(NH_{3}\) will shift the equilibrium towards left i.e. more reactants will be formed.

B) Extra N2 is removed, the equilibrium will shift towards the left i.e. more reactants will be formed.

C) N2 is added, the equilibrium will shift towards right i.e. more PRODUCT will be formed. (I assumed there was a typing error and it meant Addition instead of removal)

D) When we decrease the pressure the equilibrium will shift towards the left i.e. more reactant will be formed.

E) Catalyst has no effect on the system

The  pressure (in torr) of the “dry” hydrogen would be 704.06 torr.

The Ideal gas law is the equation of state of a hypothetical ideal gas. It is a good approximation to the behaviour of many gases under certain conditions. The ideal gas equation can be written as-

                        PV = nRT

where,

P = Pressure

V = Volume

T = Temperature

n = number of moles

The ideal gas law is a combination of Boyle's law and Charles' law. These law are applicable on real gases after small modifications in pressure and volume.

Given,

Initial volume = 59.9 L

Initial temperature =  76.0 °C

Initial pressure = 387 torr

Final volume = 13.3 L

Final temperature = 30.7°C

\(\frac{P_{1}V_{1} }{T_{1} } = \frac{P_{2}V_{2} }{T_{2} }\)

( 387 × 59.9 )÷ 76 = ( P × 13.3 ) ÷ 30.7

P = 704.06 torr

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More acid solution has red colour, more basic solution has purple colour whereas neutral solution has green colour.

As the solution becomes more acidic, the color of the solution changes from green toward red.

As the solution becomes more basic, the color changes of the solution from green toward purple.

Green color of the solution represents a neutral solution having pH 7.

So we can conclude that More acid solution has red colour, more basic solution has purple colour whereas neutral solution has green colour.

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Answer:

D

Explanation:

hear and pressure brings about these reactions deep in the interiors of stars

The mass of fe2(so4)3 that is required to produce 1.15 mol fe3 is 230 gm.

The molar mass of a chemical compound is described as the mass of a sample of that compound divided by using the amount of substance that is the wide variety of moles in that pattern, measured in moles. The molar mass is a bulk, no longer molecular, an asset of a substance.

The molar mass of a substance is the mass in grams of one mole of the substance. As shown in this video, we are able to attain a substance's molar mass by summing the molar hundreds of its thing atoms. we will then use the calculated molar mass to convert among mass and variety of moles of the substance.

Calculation:-

Fe₂(SO₄)₃ -------> 2Fe₂⁺³ + 3SO₄⁻²

2 mole Fe⁺³ produced by  1 mole fe2(so4)3

1.15 mol Fe⁺³ produced by = 1/2 × 1.15

                                             = 0.575 mol

molar mass of fe2(so4)3 = 400 g

mass of 0.75 moles of  fe2(so4)3 is = 400 ×  0.575

                                                            = 230 gm

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Answer:

It is the temperature at which water is frozen or is pure ice

"Absolutely zero" temperature is the coldest temperature possible. It's so cold that everything stops moving and has no energy left. Scientists use a special scale called Kelvin to measure temperature, and absolute zero is at 0 Kelvin or -273.15 degrees Celsius (-459.67 degrees Fahrenheit). We can't actually reach absolute zero in real life, but scientists have come very close in laboratories using special cooling methods.

Answer:

B: They released acids to help break down bare rock to form soil.

Answer:

B. They release acids that help break down bare rock to form soil.

Explanation:

Quiz Verified

The thermodynamic process that occurs during the adhesive crosslink process is exothermic.

During the adhesive crosslink process, the adhesive undergoes a chemical reaction that forms covalent bonds between the adhesive molecules. This chemical reaction releases energy in the form of heat, which is known as an exothermic process. As the adhesive crosslinks, the material becomes more rigid and gains strength, which is why this process is often used to create strong bonds in materials.

This process can be detected by monitoring the temperature changes in the adhesive during the crosslink process. As the adhesive undergoes crosslinking, the temperature of the material will increase due to the release of heat energy. This increase in temperature can be measured using a thermocouple or other temperature sensing device.

In addition, the chemical structure of the adhesive can also be analyzed to confirm that crosslinking has occurred. Techniques such as Fourier transform infrared spectroscopy (FTIR) can be used to detect changes in the chemical bonds of the adhesive, which can indicate the formation of new covalent bonds between adhesive molecules.

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Answer:

Brass and bronze are both metal alloys, which means they are a combination of two or more different metals. Brass is composed of copper and zinc, whereas bronze is made up of copper and tin, sometimes with other elements such as phosphorus or aluminium added in.

Answer:

Both brass and bronze are metal alloys, which are made up of two or more distinct metals. Brass is comprised of copper and zinc, while bronze is formed of copper and tin, with the addition of phosphorous or aluminum.

Explanation:

Hope it helps;)

Answer:

It would sink because the density of the ball, 0.802 g/cm3, is greater than the density of gasoline.

On comparing the densities of both ball and gasoline, the density of the plastic ball is larger than that of petrol, it would sink in a container of petrol.

Mass is a physical property of matter that measures the amount of substance in an object. It is typically measured in grams (g) or kilograms (kg).

The density of the plastic ball can be calculated using the formula:

Density = Mass / Volume

Density of the plastic ball = 15.8 g / 19.7 \(\rm cm^3\) = 0.801 g/ \(\rm cm^3\)

The density of gasoline is about 0.7 g/ \(\rm cm^3\)

Since, the density of the plastic ball is greater than the density of gasoline, the plastic ball would sink in a container of gasoline.

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The name of the organic compound is 2-methyl pentane. The given organic compound is a five-carbon system with a substitution at the C-2 carbon. The naming of an organic compound is done according to the rules given by IUPAC.

The given organic compound has 5 carbon in its main chain. So It has the root word Pent. Since, all the bonds are single bonds, the organic compound is saturated, hence it has the suffix -ane. Hence the unsubstituted straight chain is pentane.

Numbering is done from right to left, because when the numbering is from right to left, the substituted carbon gets C-2, when it is numbered from left to right, the substituted carbon gets C-4. So the numbering is from the right and the substituted carbon is C-2. The substituent is a single carbon system, a methyl substituent. So the organic compound is named 2-methyl pentane .

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Answer:

An outlier on a scatter plot represents something that doesn't fit.

The outlier on this scatter plot is D.(105, 320) might represent a newborn shark

Answer:

0.086

Explanation:

got it on acellus

The mass of the dry solute recovered from the given data is 0.086 g.  Option C

To determine the mass of the dry solute recovered, we need to subtract the mass of the boat from the mass of the boat with the dry solute.

Given the data provided:

Boat Mass: 0.730 g

Boat + Solution: 0.929 g

Boat + Dry: 0.816 g

To find the mass of the dry solute, we subtract the boat mass from the boat + dry mass:

Mass of Dry Solute = (Boat + Dry) - (Boat Mass)

Mass of Dry Solute = 0.816 g - 0.730 g

Mass of Dry Solute = 0.086 g

Therefore, the correct answer is c) 0.086 g.

The mass of the dry solute recovered from the given data is 0.086 g. It is important to note that the mass of the dry solute is obtained by subtracting the mass of the boat from the mass of the boat with the dry solute, as the boat mass represents the weight of the empty boat or container used in the experiment.

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In a physical change, the substance's shape or appearance changes, but the type of matter it contains stays the same. But when matter undergoes a chemical change, at least one new substance with novel properties is created.

Chemical synthesis, or, alternatively, chemical decomposition into two or more different substances, occurs when one substance reacts with another to create a new substance.

Physical modifications are those that affect a chemical substance's form but not its chemical composition. Physical changes are usually unable to separate compounds into chemical elements or simpler compounds, but they can be used to separate mixtures into their component compounds.

An overview was given as your information is incomplete.

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Answer:

Atoms react in whole number ratios of individual atoms.

Explanation:

Answer:

Temperature of boiling water cannot be measured by a Clinical thermometer The reason behind this is that the range of clinical thermometer varies between only 35° C to 42° C.

Answer:

It cannot be measured using clinical thermometer.

Explanation:

Thermometer is an instrument use for measuring temperature that is the degree of hotness and coldness

The temperature of boiling water cannot be measured by clinical temperature or thermometer because it can only measure temperature ranges from 30 to 40°c and the temperature for boiling water is 100°c.

Explanation:

Given:

20.5 torr

78.6 torr

225 torr

Change into atm

Computation:

We know that;

1 torr = 0.00131579 atm

So,

1. 20.5 torr

= 20.5 x 0.00131579 atm

= 0.02697

= 0.027 atm (Approx)

2. 78.6 torr

= 78.6 x 0.00131579 atm

= 0.103090

= 0.103 atm (Approx)

3. 225 torr

= 225 x 0.00131579 atm

= 0.2960

= 0.296 atm (Approx)

Sure! Heptane is a hydrocarbon with seven carbon atoms. The nine structural isomers of heptane are:

1. Straight-chain heptane: CH3-CH2-CH2-CH2-CH2-CH2-CH3
2. 2-Methylhexane: CH3-CH(CH3)-CH2-CH2-CH2-CH3
3. 3-Methylhexane: CH3-CH2-CH(CH3)-CH2-CH2-CH
4. 2,2-Dimethylpentane: CH3-C(CH3)2-CH2-CH2-CH3
5. 2,3-Dimethylpentane: CH3-CH(CH3)-C(CH3)2-CH2-CH3
6. 2,4-Dimethylpentane: CH3-CH(CH3)-CH2-C(CH3)2-CH3
7. 3,3-Dimethylpentane: CH3-CH2-C(CH3)2-CH2-CH3
8. 3-Ethylpentane: CH3-CH2-CH2-CH2-CH(CH3)-CH2-CH3
9. 2,2,3-Trimethylbutane: CH3-C(CH3)2-CH(CH3)-CH3

Each of these isomers has a different arrangement of atoms, which gives them unique structural formulas. I hope this helps! the names of the nine structural isomers of heptane, which are alkanes with the molecular formula C7H16. You can then look up their structures using these names: 1. Heptane (n-heptane) 2. 2-Methylhexane 3. 3-Methylhexane 4. 2,2-Dimethylpentane 5. 2,3-Dimethylpentane 6. 2,4-Dimethylpentane 7. 3,3-Dimethylpentane 8. 3-Ethylpentane 9. 2,2,3-Trimethylbutane These isomers differ in the arrangement of their carbon atoms, which is why they are called structural isomers.

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On top of a mountain, separating the plungers would be simpler than at sea level.

a. When rubber plungers are pressed together, it becomes difficult to separate them because of a phenomenon known as adhesion. Adhesion is the molecular attraction between different substances that are in contact with each other.

b. It would be easier to separate the rubber plungers on top of a mountain because the atmospheric pressure is lower at higher altitudes. Atmospheric pressure is the force per unit area exerted by the weight of air molecules in the atmosphere.

c. The reason it would be easier to separate the rubber plungers on top of a mountain is that atmospheric pressure affects the strength of the molecular bonds between the surfaces of the plungers.

When the plungers are under atmospheric pressure at sea level, the molecules on their surfaces are pushed together with great force, and the bonds between them become stronger.

When the plungers are taken to higher altitudes, there is less atmospheric pressure pushing the molecules together, and the bonds between them become weaker.

Therefore, it would be easier to separate the plungers on top of a mountain than at sea level.

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Answer: Sea Level

Explanation: facts

The following which is not a part of  Dalton atomic theory is the properties of atoms of the same elements can be different . Thus option B is correct.

Dalton has proposed his theory in three parts and each part stated that

The first portion of his theory asserts that all stuff is made up of indivisible atoms.

According to the second section of the theory, all atoms of a given element have the same mass and characteristics.

Compounds, according to the third section, are combinations of two or more different types of atoms.

Dalton has given three laws

Thus, the following which is not a part of  Dalton atomic theory is the properties of atoms of the same elements can be different . Thus option B is correct.

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Your question is incomplete, but your complete question was

which of the following is not a part of the ideas john dalton proposed in his model

A. All matter is composed of indivisible atoms.

B. The properties of atoms of the same element can be different.

C. Compounds form when atoms combine in whole number ratios.

D. An atom can neither be created nor destroyed.

Answer:

You can tell types of matter apart based on their properties. Physical properties of matter can be observed or measured without changing the identity of the substance. ... Characteristic physical properties are properties that are always the same for a substance - so they can be used to identify a substance.Explanation:

The volume of a 14.00g of nitrogen at 5.64atm and 315K is 4.59L.

The volume of an ideal gas can be calculated using the following ideal gas equation formula;

PV = nRT

Where;

An ideal gas is a hypothetical gas, whose molecules exhibit no interaction, and undergo elastic collision with each other and with the walls of the container.

The number of moles in 14g of nitrogen can be calculated as follows:

moles = 14g ÷ 14g/mol = 1mol

5.64 × V = 1 × 0.0821 × 315

5.64V = 25.86

V = 25.86 ÷ 5.64

V = 4.59L

Therefore, 4.59L is the volume of the gas

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Answer:

hola no ablo inglés porfavor

Part A: O2 can be categorized as a weak-field ligand.

Part B: The categorization of O2 as a weak-field ligand can be explained in terms of crystal field splitting. In a crystal field, ligands interact with the metal ion in a coordination complex, causing the degeneracy of the d orbitals to be lifted. This splitting results in two sets of orbitals: lower energy (eg) and higher energy (t2g) orbitals.

Strong-field ligands cause a large energy difference between the eg and t2g orbitals, resulting in a large crystal field splitting. On the other hand, weak-field ligands cause a small energy difference between the eg and t2g orbitals, leading to a small crystal field splitting.

In the case of O2, it acts as a weak-field ligand. The oxygen molecule is a π-acid, meaning it accepts electron density from the metal ion's d orbitals. This donation of electrons from the d orbitals to the antibonding π* orbitals of O2 results in weak bonding and a small crystal field splitting. As a result, the energy difference between the eg and t2g orbitals is relatively small.

In summary, O2 is categorized as a weak-field ligand based on its ability to cause a small crystal field splitting. This classification arises due to its π-acid nature and its weak bonding interactions with the metal ion's d orbitals. Understanding the strength of ligands and their impact on crystal field splitting is crucial in explaining the color differences observed in oxyhemoglobin and deoxyhemoglobin, where the type of ligands affects the electronic transitions within the coordination complex.

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Answer:

The TV signal.

Explanation: Hope this is right! :)

While there are several derived mammalian characteristics that define this group of animals, there are also some traits that are not considered unique to mammals. Egg-laying and the lack of a diaphragm in some mammals are examples of traits that are not derived mammalian characteristics.

Derived mammalian characteristics are those traits that distinguish mammals from other animal groups. Some of the derived mammalian characteristics include the presence of mammary glands, hair, three middle ear bones, and a neocortex. These traits are unique to mammals and have been developed throughout evolution to help them survive in their environments. However, there are some traits that are not considered derived mammalian characteristics.
One of the traits that is not considered a derived mammalian characteristic is egg-laying. While most mammals give birth to live young, there are some mammals such as the platypus and echidna that lay eggs. This trait is not unique to mammals and is also seen in other animal groups such as reptiles and birds.
Another trait that is not considered a derived mammalian characteristic is the lack of a diaphragm in some mammals. While most mammals have a muscular sheet called the diaphragm that separates the thoracic and abdominal cavities and aids in breathing, some mammals such as sloths and armadillos lack a fully developed diaphragm.
In conclusion, while there are several derived mammalian characteristics that define this group of animals, there are also some traits that are not considered unique to mammals. Egg-laying and the lack of a diaphragm in some mammals are examples of traits that are not derived mammalian characteristics.

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The term that comes to mind when considering the mother's actions in this scenario is "inclusive fitness." Inclusive fitness refers to the total number of an individual's genes that are passed on to the next generation, including those passed on indirectly through relatives.

In the case of the mother and daughter, the mother's decision to act altruistically by providing her daughter with food would be justified if it ultimately led to the production of more offspring. However, determining the exact number of offspring that the daughter would produce with and without the food is difficult, if not impossible. Therefore, the mother must make an educated guess based on the available information and her own intuition. If the mother believes that providing her daughter with food will significantly increase her chances of reproducing successfully, then acting altruistically would likely be the best course of action.

Ultimately, the mother's decision should be based on a combination of factors, including the potential benefits to both herself and her daughter, as well as the costs and risks involved. In some cases, acting altruistically may not be the best choice, particularly if it puts the mother or other family members at risk. However, if the potential benefits outweigh the costs, then acting altruistically can be a wise decision that benefits both the individual and their relatives.

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