QUESTION 39 CH3CO2H is called acetic acid. The name implies that
O a. It does not react with either acids or bases.
O b. It can donate an H+ ion to a base, and forms CH3CO2-
O c. It can react with acids, but does not react with bases.
O d. It can accept an H+ ion from a base, and forms CH3CO2H2+
O e. It can donate an electron to a base, and forms CH3CO2H+

The gases that can work well in a thermoacoustic generator are inert gases and inert gases are found in group 8 of the periodic table.

A thermoacoustic generator is used to convert acoustic or sound energy into electrical energy. This generator comprises of thermoacoustic engine coupled with an alternator.

Thermoacoustic devices such as thermoacoustic engine, work well on noble or inert gases such as helium and argon.

The inert gases or noble gases are found in the group 8 of the periodic table.

Example of group 8 elements (noble gases);

Thus, the gases that can work well in a thermoacoustic generator are inert gases and inert gases are found in group 8 of the periodic table.

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Answer:  " \(1.41 * 10^{24}\) " atoms of aluminum (Al) .

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Explanation:

_________________________

Using a technique called "dimensional analysis" ; as follows:

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→  " \(\frac{2.34 mol Al}{1} * \frac{6.022*10^{23}atoms Al}{1 mol Al} = ?\)  

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The units "mol Al" ["moles of aluminum"] cancel out; and we have:

________________________

→  "\([(2.34) * (6.022 * 10^{23})] = ?\) atoms of Al [aluminum].

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Note that by definition: 1 (one) "mole" (abbreviated "mol") of anything consists of " \(6.022*10^{23}\) " units " of that particular thing.

 This number:  6.022*10^{23} —is known as:  "Avogadro's number".

________________________

→  [ 2.34 * 6.022 * 10^23] ;

     = 1.409148 * 10^24 ;

                → Round to 3 (Three) significant figures;

                →  since: "2.34" has 3 (Three) significant figures;

                  →  to get: " \(1.41 *10^{24}\)  atoms of aluminum (Al).

________________________

Hope this is helpful to you!  Wishing you the best!

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Answer:

a compound

Explanation:

the number of half-lives that would have occur to reduce a 15 g sample of Nobelium-254 down to 0.09375 g is 7.3

To calculate the number of half-lives that would have occur to reduce a 15 g sample of Nobelium-254 down to 0.09375 g, we use the formula below.

Formula:

Where:

From the question,

Given:

Substitute these values into equation 1

Hence, the number of half-lives that would have occur to reduce a 15 g sample of Nobelium-254 down to 0.09375 g is 7.3

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Answer:

21409

Explanation:

88.1 mol x 24.3059 = 21409.

that's the correct answer

Answer:

The answer is below

Explanation:

Avogadro stated that "Equal volumes of all gases at the same temperature and pressure contain the same number of molecules". Hence at standard temperature and pressure 1 mole of a gas occupies 22.4 liters of volume.

1 mol = 22.4 liters

Given a gas with 1 L and mass of 1.92 g at STP.

number of moles = 1 L / (22.4 L / mol) = 0.0446 mol

The molar mass = mass of gas / number of moles

molar mass = 1.92 g / 0.0446 mol

molar mass = 43.008 g / mol

Given:

Now,

Number of moles will be:

= \(\frac{1 \ L}{22.4 \ L/mol}\)

= \(0.446 \ mol\)

hence,

The molar mass,

= \(\frac{Mass \ of \ gas}{Number \ of \ moles}\)

By putting the values,

= \(\frac{1.92}{0.446}\)

= \(43.008 \ g/mol\)

Thus the answer above is correct.

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Beta-carotene is a precursor retinol.

Beta-carotene is the precursor to vitamin A. meals derived from plant life offer carotenoids, some of which can be transformed into vitamin A. The richest sources of retinoids are ingredients derived from animals- liver, fish liver oils, milk and milk merchandise, butter, and eggs.

One way in which beta-carotene can be converted to vitamin A is to interrupt it apart at the center which is a concept to be most critical biologically. The breakdown of beta-carotene takes place within the partitions of the small gut (intestinal mucosa) and is catalyzed by using the enzyme β-carotene dioxygenase to shape the retina.

Substances that continue others with regard to nutrients, compounds that can be transformed into lively nutrients aka pro vitamins. The precursor of vitamin A is beta-carotene which is typically determined in vegetation. One example of a meal with excessive nutrition interest is carrots or oranges.

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1) Beryllium. This element is in the second group and the second period. The atomic number is 4 which is the number of protons.

The mass number is the sum of neutrons and protons.

Assuming the element has no charge the number of electrons is equal to the number of protons.

Protons: 4.

Neutrons: the mass number - the atomic number = 9 - 4 = 5.

Electrons: 4.

Answer:

Which observation provided Albert Einstein the clue that he needed to explain the photoelectric effect? Energy of electrons depends on light's frequency, not intensity. A change in which property of light will have no effect on whether or not the photoelectric effect occurs?

Explanation:

Answer:

 6.022 × 10²³ units of that substance 

Explanation:

a). Thus, the density of the unknown fluid is 720 kg/m³. b).  So, the water layer is at the bottom and the unknown fluid layer is on top in the container. are the answers

Given data Absolute pressure at the bottom of the container of fluid = 140kPa

Depth of the water layer = 20 cm

Depth of the unknown fluid layer = 30 cm

a) Density of the unknown fluid

Let the density of the unknown fluid be ρ2 Formula used

Pressure = Density × gravity × height + Atmospheric pressure

At the bottom of the

container Pressure = Density × gravity × height + Atmospheric pressure

140 kPa = ρ1 × 9.8 m/s² × (0.2 + 0.3) m + atmospheric pressure

Also, Density of water = 1000 kg/m³

We need to find the density of the unknown fluid i.e. ρ2

Thus, the density of the unknown fluid is 720 kg/m³

b) Layer which is on top in the container

Water is denser than the unknown fluid

So, the water layer is at the bottom and the unknown fluid layer is on top in the container.

Hence, option (C) is correct.

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a) The density of the unknown fluid is 478.48 kg/m³.

b) The layer of the unknown fluid is on top of the container.

Given that the absolute pressure at the bottom of a container of fluid is 140 kPa. One layer of fluid is clearly water with a depth of 20 cm. The other mysterious fluid though has a depth of 30 cm. We need to find out the density of the unknown fluid and also identify which layer is on top of the container.

We know that the pressure at the bottom of a container of fluid is given by the formula:

P = hρg

Where,

P is the absolute pressure

h is the depth

ρ is the density

g is the acceleration due to gravity

Substituting the given values in the formula, for water,

P = hρg

140 × 10³ = 20 × ρ × 9.81

ρ = 716.92 kg/m³

Similarly for the other fluid,

P = hρg

140 × 10³ = 30 × ρ × 9.81

ρ = 478.48 kg/m³

Therefore, the density of the unknown fluid is 478.48 kg/m³.

Now, to identify the layer that is on top in the container, we need to compare the densities of the two layers. The layer with the lower density will be on top. Here, we can see that the density of water (which is 716.92 kg/m³) is greater than the density of the unknown fluid (which is 478.48 kg/m³). Therefore, the layer of the unknown fluid is on top of the container.

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Answer:

the food chain you mean

Explanation:

pollution than mosquitoes then alligators

The pair of reactants that will result in a precipitation reaction is Pb(NO3)2(aq) and KI(aq).

When Pb(NO3)2(aq) (lead nitrate) and KI(aq) (potassium iodide) are mixed together, a precipitation reaction occurs because a solid compound called lead iodide (PbI2) is formed. The reaction can be represented as follows:

Pb(NO3)2(aq) + 2KI(aq) → PbI2(s) + 2KNO3(aq)

In this reaction, the lead ions (Pb2+) from lead nitrate combine with the iodide ions (I-) from potassium iodide to form insoluble lead iodide, which appears as a yellow precipitate. The potassium ions (K+) and nitrate ions (NO3-) remain in solution as they are soluble.

Precipitation reactions occur when two soluble compounds react to form an insoluble solid (precipitate) due to the exchange of ions. The solubility of different compounds varies, and when the product of the reaction has a low solubility, it will precipitate out of solution.

In the given options, the other pairs of reactants either do not form an insoluble compound or do not result in a precipitation reaction. Only the reaction between Pb(NO3)2 and KI leads to the formation of a precipitate, making it the correct answer.

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When the enzyme is abundant Option A.increasing the concentration of the reactants will increase the reaction rate.

option A is correct

Enzyme awareness increasing enzyme awareness will speed up the reaction, as long as there may be a substrate to be had to bind to. once all the substrate is sure, the reaction will now not speed up, in view that there can be nothing for added enzymes to bind to.

PH is a chief element affecting the interest of enzymes. The ionization of amino acid molecules and atoms takes place while the pH is altered, thereby affecting the shape and form of proteins and therefore disrupting their activities.

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The quantum numbers are used to describe the position of an electron in atom.

The quantum numbers are used to describe the position of an electron in atom. I have attached a picture that shows the complete question.

For the 1s orbital;

n =1

l = 0

ml = 0

ms = ±1/2

For the 2s orbital;

n = 2

l = 1

ml = -1, 0, 1

ms = ±1/2

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Explanation:

The sequence from longest wavelength (radio waves) to shortest wavelength (gamma rays) is also a sequence in energy from lowest energy to highest energy. Remember that waves transport energy from place to place. The energy carried by a radio wave is low, while the energy carried by a gamma ray is high.

Across the electromagnetic spectrum from radio to gamma, the frequency and energy of the waves increases.

Gamma rays contain the shortest wavelengths, the highest energies and the highest frequencies while on the other hand, Radio waves are largest wavelengths, have the lowest energies, and lowest frequencies.

Gamma ray is a type of electromagnetic waves which does not require any medium for its propagation whereas radio waves need medium for its propagation so we can conclude that when we move from radio to gamma rays frequency and energy of the waves increases.

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Answer:

78.5 mL

Explanation:

Step 1: Given data

Mass of the lead fishing weight: 39.7 g

Volume of water in the graduated cylinder: 75.0 mL

Step 2: Calculate the volume of the lead fishing weight

The density of lead is 11.34 g/mL.

39.7 g × (1 mL/11.34 g) = 3.50 mL

Step 3: Calculate to what volume will increase the water level

The final volume of water will be equal to its initial value plus the volume displaced by the lead fishing weight.

V = 75.0 mL + 3.50 mL = 78.5 mL

Answer:

It kinda helps but not  really

Thanks for trying anyway doe!

Explanation:

Answer:

the answer is C

Explanation:

there is no such thing as COLD exept absolute ZERO. anything that feels COLD, perse, is just tranfering your thermal energy into it, since it is lacking that energy

When the chemicals inside an instant cold pack mix together then the mixture absorbs thermal energy from the surroundings.

Heat always flow from hot body to cold body in order to maintain the equilibrium between two bodies.

So when the chemicals inside an instant cold pack mix together then they will absorbs heat in the form of thermal energy from the surronding as they are in cool temperature and will not able to give off heat.

Hence absorption of thermal energy from the surrounding takes place.

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The statement "Cross interactions between components of a mixture are represented by the ideal mixture model." is False.

The ideal mixture model represents interactions between components of a mixture as zero. According to the ideal mixture model, the energy of a mixture of gases is determined entirely by the kinetic energy of the individual molecules in the mixture.

A binary solution is a mixture of two pure components. An ideal solution is one in which the behavior of each component is ideal, implying that the intermolecular forces between the different molecules are identical, as are the intermolecular forces between the like molecules. In this case, the interactions between the molecules in the solution would be identical to the interactions between the molecules in the pure liquids.

The model that represents cross interactions between components of a mixture is the non-ideal mixture model. Non-ideal mixtures are mixtures in which the intermolecular forces between the components vary from one component to the next.

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Answer: The pH scale is a color coded scale that identifies acids and bases and neutral substances. Acids are 1-7 and bases are 8-14. Neutral substance are neutral like water.

Explanation:

pH or pOH is the measure of acidity or alkalinity of a solution.

pH is calculated by taking negative logarithm of hydrogen ion concentration.

The pH   scale is a color coded scale that identifies acids and bases and neutral substances. The colours from yellow to red indicate an acidic solution, colours blue to violet indicate base and green colour indicates that a solution is neutral.

Acids have pH ranging from 1 to 6.9, bases have pH ranging from 7.1 to 14 and neutral solutions have pH equal to 7. Thus pH scale range from 1 to 14.

Water is neutral with a pH of 7.

The empty spaces in the material are called pores. The materials would be make the most effective aquifer is the material that has the high porosity and the high permeability.

The material that has the high porosity and the high permeability will be used make the most effective aquifer. The Porosity is the amount of the empty space within the material. The Permeability describes that how the well the pores in the material are connected.

The empty spaces in the materials are called as the pores. The Porosity is the percentage of the void space in the rock. For the aquifer , the material should have the high porosity and the high permeability.

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The given chemical equation can be balanced as: CH4 + 2O2 → CO2 + 2H2OTherefore, the balanced chemical equation for the reaction between 46 g of CH4 and 32 g of O2 is:CH4 + 2O2 → CO2 + 2H2OMoles of CH4 = (46 g)/(16.04 g/mol) = 2.87 molMoles of O2 = (32 g)/(32 g/mol) = 1 mol.

Moles of CH4 = (46 g)/(16.04 g/mol) = 2.87 molMoles of O2 = (32 g)/(32 g/mol) = 1 molFor the given reaction, one mole of CH4 reacts with 2 moles of O2. Therefore, 2.87 moles of CH4 would react with 2 × 2.87 = 5.74 moles of O2. As we can see from the given values, only 1 mole of O2 is present. Hence, O2 is the limiting reactant.The balanced chemical equation for the reaction between 46 g of CH4 and 32 g of O2 is:CH4 + 2O2 → CO2 + 2H2OOn

The basis of the balanced chemical equation, 2 moles of O2 is required for one mole of CH4. Here, the moles of O2 is lesser than 2 times the moles of CH4, which means O2 is the limiting reactant and CH4 is the excess reactant. Hence, 32 g of O2 will react completely with 1 mole of CH4, and 14.14 g of CO2 and 4 g of H2O will be produced as per the stoichiometry.

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According to the information in the fragment, it can be inferred that the cause of the increase in songbirds at the feeders is the addition of dried apples and raisins (option B).

To identify the cause of the increase in songbirds at the feeders we must carefully read the text and identify the information regarding the increase in the number of birds at the feeders.

According to this strategy we will find that Dr. Elsa found that by adding dried apples and raisins to the bird food mix, they increased in number, surely this mixture attracted the attention of more birds.

So, it can be concluded that Dr. Elsa's study is useful to know what is the cause of the increase in songbirds because after a detailed observation she was able to establish that the birds increased due to the addition of new ingredients to the food.

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Answer: An insulator would be made out of material unable to conduct electricity due to lack of fluid movement for electrons, such as rubber. Rubber properties not only prevents them from freely moving, but also helps electrons stay tightly bound to each other.

Hope this helps ^_^

Answer: absorbs food, breaks down food

Answer:

Breaks down food, mixes mashes, and churns food.

Explanation:

These are the correct answers because the stomach does those functions. The small intestine is responsible for absorbing digested nutrients. The pharynx food from the esophogus.  

Oxygen and calcium react to generate calcium oxide. The chemical made of calcium and oxygen has the formula CaO. This reaction's chemical formula is 2Ca + O2 2CaO.

the eight types of chemical reactions that are most frequently encountered are: decomposition reaction, combination reaction, combustion reaction, single displacement reaction, double displacement reaction, precipitation reaction, and redox reaction.

The evolution of a gas, precipitate formation, color change, temperature change, and state change are significant aspects.

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Answer:

There is nothing attached to this question so I unfortunately cannot help you

Explanation:

The correct Lewis structure of SO2 is the Lewis structure that shows all the 12 valence electrons in the molecule.

A Lewis structure shows the number of valence electrons on the valence shell of all the atoms in a compound. The electrons are shown as dots around the symbol of each element or a dash to indicate shared electrons in a covalent bond.

Looking at the Lewis structure of SO2 attached to this answer, we can see the twelve valence electrons in the molecule and how they are distributed around each atom as shown.

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Answer:

hey mateee

Boyle's law :-  the pressure (p) of a given quantity of gas varies inversely with its volume (v) at constant temperature.

Boyle's law can also be formularized as P1V1 = P2V2

Charle's law :-  the volume occupied by a fixed amount of gas is directly proportional to its absolute temperature, if the pressure remains constant.

Charle's law can also be formularized as V1/T1 = V2/T2