You measure the flame of a candle and get a reading of 1,376.06 K. This value is equal to

Answer:

47.72%

Explanation:

3.98/8.34 x 100 = 47.72%

Answer:

Doctors will use other drugs that are known to be able to treat TB, even if they are less effective than the common drugs.

Explanation:

When a case of drug resistance is established, the doctor has to change the prescription and give other drugs that are also known to be effective against the organism.

Bacterial drug resistance is a common clinical experience. Many established drugs have been found to be ineffective in treating common infections leading to the continuous quest for improved antibiotics that are active against most organisms.

When doctors discover that someone who has an active case of drug-resistant tuberculosis, the doctor may need to change the prescription to other drugs that are also known to be effective against Mycobacterium tuberculosis, the causal agent of tuberculosis.

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The atoms of an element are made of subatomic particles that include electrons, protons, neutrons, positrons, etc. The electron has the least amount of relative mass. Thus, option A is correct.

Subatomic particles are the smallest unit that makes a whole atom. The positively charged particle, a proton has a relative mass of 1.672 × 10⁻²⁷ kg and is the same as the neutron particle.

Though the neutrons lack any charge and are present in the nucleus with protons. The other particle called electrons is negative in charge with a relative mass of 9.1 × 10⁻³¹ Kg.

The electron is outside the nucleus in the shells. The positrons have the same mass as an electron but carry an opposite charge and act as antimatter.

Therefore, option A. the electrons have the least amount of mass in an atom.

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According to the FeCl3 test, aspirin contains salicylic acid's phenol.

In this instance, we consider the ease with which ferric chloride, FeCl3, interacts with phenol groups; in fact, this is one method for qualitatively demonstrating the existence of phenols in an organic sample.

Hydroxile groups (-OH) joined to an aromatic ring are referred to as phenol groups. A material with phenol functional groups will now become purple if FeCl3 is added to it. In this instance, the aspirin sample will not react whereas the salicylic acid will become purple for the aforementioned reason because aspirin lacks a phenol group in contrast to salicylic acid, which is used to create aspirin but really has a phenol group.

Due to the creation of an iron-containing compound or chelant, this purple hue is evident.

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Answer:

oh thats a bomb song tho i love

Answer: Christina your killing me pls come back i screwed everything up with everyone pls

Explanation: pls

no. of mole = 88 ÷ ( 12 + 2(16) )

= 2 mol

mass of C = 2 × 12

= 24g ( A )

Answer:

They are: Response to environment Reproduction Metabolism Homeostasis Growth Heredity and Cellular organization

Explanation:

Answer:

Response to Stimuli

Explanation:

All i did was look up the definitions

Answer:

2.2876e+24 or 2.2876000000000000000000000000 (same thing)

Explanation:

First we can do the exponents first

When there is an exponent on top of a number, it means that we need to multiply that number by the amount that the exponent says by itself.

10 × 10 × 10 × 10 × 10 × 10 × 10 × 10 × 10 × 10 × 10 × 10 × 10 × 10 × 10 × 10 × 10 × 10 × 10 × 10 × 10 × 10 × 10 × 10 = .....

1E24 or 1,000,000,000,000,000,000,000,000

1,000,000,000,000,000,000,000,000 × 1.204 = ......

2.2876e+24 or

2.2876000000000000000000000000

~ 2.2876 r 2.288 or 2.28, or 2.3

Depends on how much you want to round it up to.

Answer:

I'm sorry but I cant answer.

Compound X meits at 801°C and is a good electrical conductor when dissolved in water. Compound Y boils at 77°C. is insoluble in water and is a non-conductor of electricity. Compound X is ionic bonding and compound y is covalent bonding.

The main interaction in ionic compounds is ionic bonding, a type of chemical bonding that involves the electrostatic attraction between two atoms or ions with dramatically differing electronegativities.

The sharing of electrons between two or more atoms forms a covalent connection. When two or more ions join in contact, they can create ionic bonds that are held together by charge differences.

In most cases, ionic compounds are created when a metal reacts with a nonmetal (or a polyatomic ion). The reaction between two nonmetals produces covalent compounds. Binary compounds containing hydrogen are typically covalent compounds since hydrogen is a nonmetal.

Thus, Compound X is ionic bonding and compound y is covalent bonding.

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Answer:

If a substance does not dissolve in a solvent, we say that it is insoluble. For example, sand does not dissolve in water – it is insoluble.

Filtration is a method for separating an insoluble solid from a liquid. When a mixture of sand and water is filtered:

the sand stays behind in the filter paper (it becomes the residue)

the water passes through the filter paper (it becomes the filtrate)

The slideshow shows how filtration works

Explanation:

1st

A beaker containing a mixture of insoluble solid and liquid. There is filter paper in a filter funnel above another beaker.

2nd

The mixture of insoluble solid and liquid is poured into the filter funnel.

3rd

The liquid particles are small enough to pass through the filter paper as a filtrate. The solid particles are too large to pass through the filter paper and stay behind as a residue.

Answer:

Filtration is the action or process of filtering something. Filtration is the method used for separating an insoluble solid from a liquid. Ex - oil and water

I am really sorry but I don't know how to include the word solube!!!

According to the concept of half-life, 6.25 g of thorium -231 is left after 102 hours.

Half -life of a substance is defined as the time which is required for half of the quantity of a radioactive substance to get decayed.It is a term which is used in nuclear chemistry for describing how quickly unstable atoms undergo radioactive decay into other nuclear species by emitting particles or the time which is required for number of disintegrations per second of radioactive material to decrease by one half of its initial value.

For thorium -231 one half life=25.5 hours ,so,102 hours =102/25.5=4 half lives.

After 1 half life 100 g is left , so after 4 half lives,that is, 1/2×1/2×1/2×1/2×100=6.25 g.

Thus, after 102 hours 6.25 g is left.

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The physical quantity that is provided directly by the Gibbs free energy change, in general, is the maximum amount of work that can be done by a thermodynamic system at constant temperature and pressure. This is represented by the equation: ΔG = ΔH - TΔS

The Gibbs free energy change (ΔG) is the difference between the enthalpy change (ΔH) and the product of the temperature (T) and the entropy change (ΔS). This equation is used to determine the maximum amount of work that can be done by a system at constant temperature and pressure. If the Gibbs free energy change is negative, the reaction is spontaneous and will occur without the input of external energy. If the Gibbs free energy change is positive, the reaction is non-spontaneous and will not occur without the input of external energy.

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Answer:liters

Explanation:

C. All the water would reach an equilibrium temperature and heat would stop flowing.

When hot and cold water are mixed together, heat flows from hotter to colder until both reach a common temperature. This is because the molecules in the hotter water have more kinetic energy than those in the colder water, and so they transfer some of their energy to the colder water until both have the same amount of energy. Eventually, all the water in the mixture will reach the same temperature, and heat transfer will stop. Therefore, the end result of mixing hot and cold water would be that all the water would reach an equilibrium temperature and heat would stop flowing.

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Based on the number of particles involved and the enthalpy of the reaction, changes that would shift the equilibrium to the right would, according to Le Chatelier's principle, include increasing the volume of the system, reducing the pressure of the system, reducing the temperature of the system, increasing the concentration of ammonia and/or oxygen and reducing the concentration of NO and/or water. Changes in the opposite direction would cause the equilibrium to shift towards the reactants.

Upon increasing pressure or reducing volume, the equilibrium shifts in the direction that produces fewer gaseous particles. In this case, that's the reactants (9 molecules) and not the products (10 molecules). When considering temperature, it is useful to consider heat as one of the reaction components. When the enthalpy of the reaction is negative, heat is produced so it can be considered to be one of the products. Le Chatelier's principle states that upon changing one of the variables, the equilibrium will shift in the direction that counteracts the effects of the change. So, when reducing the temperature of the system, we are taking the heat out of the system, so equilibrium will shift to the products so that it can produce more heat, and vice versa. The same principle applies to the concentrations of ammonia, oxygen, water, and NO.

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For a radioactive isotope has an activity of 9.60 mCi.  , the half-life of the isotope is mathematically given as

t0.5 = 23893 s

Generally, the equation for the half-life  is mathematically given as

t0.5=T*0.693

Where

A = A0 e^(-t/T)

t/T = lnA0/A

3.75 hours/T=ln 9.60/7.39

T = 34478.5 s

Therefore

t1/2 = TX0.693

t0.5 = 23893 s

In conclusion, the half life

t0.5 = 23893 s

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The empirical formula of a compound is  ZnO.

The empirical formula of a compound is the simplest formula that shows the relative number of atoms of each element in the compound.

To find the empirical formula of compound X, we first need to convert the mass percentages to moles. The mass of zinc in 100 g of compound X is 75.5 g, and the molar mass of zinc is 65.38 g/mol. This means that there are 0.115 moles of zinc in 100 g of compound X.

The mass of oxygen in 100 g of compound X is 24.7 g, and the molar mass of oxygen is 16 g/mol. This means that there are 1.54 moles of oxygen in 100 g of compound X.

The ratio of the number of moles of zinc to the number of moles of oxygen is

0.115 / 1.54 = 0.074.

This means that the empirical formula of compound X is Zn0.074O, or ZnO.

Therefore, the empirical formula of compound X is ZnO.

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The matching words are;

A. Breaking; forming; positive.

B. Twice; half.

A. The reaction results in the formation of twenty blue-red bonds after the breakdown of five blue-blue and twenty blue-red bonds. Bond-breaking enthalpies are usually positive.

B. It is assumed that both reactants and products in the reaction shown are in the gas phase. The products include twice as many gas molecules, while the reaction's delta S value is just 50%.

Bond enthalpy measures the amount of energy needed to break a mole of a specific bond and is always positive because it is an endothermic reaction.

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Missing parts;

Match the words in the left column to the appropriate blanks in the sentences on the right. Note that some words may be used more than once and some may not be used.

1. breaking

2. forming

3. positive

4. negative

5. twice

6. half

A. The reaction involves___five blue-blue and twenty blue-red bonds and then____twenty blue-red bonds. Enthalpies for bond breaking are always_____.

B. In the depicted reaction, both reactants and products are assumed to be in the gas phase. There are___as many molecules of in the products, delta S is___for this reaction

The transformation is a) For h2o(g) h2o(l), Spontaneity: Low temperature and Type: Physical change, b) For co2(s) co2(g), Spontaneity: High temperature and Type: Physical change, c) For h2(g) 2 h(g), Spontaneity: All temperatures and Type: Chemical change and d) For 2 no2(g) 2 no(g) o2(g), Spontaneity: Non-spontaneous under all temperatures and Type: Chemical change.

To predict the spontaneity of the given transformations and identify them as physical or chemical changes, we need to consider the changes in entropy (ΔS) and enthalpy (ΔH) of the reactions. Based on the signs of ΔS and ΔH, we can determine the conditions under which each transformation is spontaneous.

a) H2O(g) → H2O(l):

This transformation involves the conversion of water vapor (gas) to liquid water. It is a physical change.

Conditions for spontaneity: The transformation is spontaneous under conditions of low temperature (where water exists as a liquid) because the process involves a decrease in entropy (ΔS < 0) due to the transition from a gaseous state to a liquid state.

b) CO2(s) → CO2(g):

This transformation involves the sublimation of solid carbon dioxide into gaseous carbon dioxide. It is a physical change.

Conditions for spontaneity: The transformation is spontaneous under conditions of high temperature because the process involves an increase in entropy (ΔS > 0) due to the transition from a solid state to a gaseous state.

c) H2(g) → 2H(g):

This transformation involves the dissociation of hydrogen molecules into hydrogen atoms. It is a chemical change.

Conditions for spontaneity: The transformation is spontaneous under all temperatures because it involves an increase in entropy (ΔS > 0) due to the increase in the number of particles (moles of gas) from 1 to 2.

d) 2NO2(g) → 2NO(g) + O2(g) (endothermic):

This transformation involves the decomposition of nitrogen dioxide into nitrogen monoxide and oxygen gas. It is a chemical change.

Conditions for spontaneity: The transformation is non-spontaneous under all temperatures because it is endothermic (ΔH > 0) and results in a decrease in entropy (ΔS < 0). The endothermic nature of the reaction requires an input of energy to proceed spontaneously.

In summary:

a) Spontaneity: Low temperature

  Type: Physical change

b) Spontaneity: High temperature

  Type: Physical change

c) Spontaneity: All temperatures

  Type: Chemical change

d) Spontaneity: Non-spontaneous under all temperatures

  Type: Chemical change

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Answer:

The cell grows into its full size

The cell copies it’s dna

Explanation:

hope this helps pls mark brainliest

Answer:

Explanation:

Overuse of antibiotics leads to bacteria's resistance against our drugs. This is increasing at an alarming rate and the reason is that overuse of antibiotics kills bacteria that lack the "resistance" gene or gene that can help them survive the antibiotics (similar is the case for insects that die to insecticides). But, some bacteria can have random mutations in their gene that can help them survive the antibiotic (similar is the case for some insects that can survive the insecticide), thus the surviving bacteria give rise to next generation of bacteria that are resistant to the given antibiotic (similar to how insects that survive the insecticide give birth to new insects that are resistant to insecticide too). Soon, every generation adds new antibiotic resistant bacteria (or new insecticide resistant insects in the case of insects) which is dangerous for all of life on this planet. Therefore, both are similar in the sense that new generations of these organisms will be resistant to our weapons against them.

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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\(\\ \tt\hookrightarrow Density=\dfrac{Mass}{Volume}\)

\(\\ \tt\hookrightarrow Volume=\dfrac{Mass}{Density}\)

\(\\ \tt\hookrightarrow Volume\propto \dfrac{1}{Density}\)

Snow with density 0.25g/ml has more volume

The volume of snow with a density of  0.5 g/mL will have more water than the snow with a density of 0.25 g/mL.

Density is the mass per unit volume. Density can be calculated by knowing the mass and volume of the object. Volume is the space occupied by an object.

Let's take the volume to be 100

The densities are 0.5 g/mL and 0.25 g/mL

so, volume = mass / 0.5 g/ml

mass = 100 x 0.5 = 50

Second density =  0.25 g/mL

volume = mass / 0.25 g/ml

Mass = 100 x 0.25 = 25.

The mass is directly proportional to the density. So, if the mass has increased the density is also increased, so the volume of snow with a density of  0.5 g/mL will have more water than the snow with a density of 0.25 g/mL.

Thus, more water will be present in the amount of snow with a density of 0.5 g/mL than the snow with a density of 0.25 g/mL.

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Answer:

Sound waves in air (and any fluid medium) are longitudinal waves because particles of the medium through which the sound is transported vibrate parallel to the direction that the sound wave moves.

The illustration of Thomson's atom represents a neutral atom. In this case, the total amount of positive charge and the total amount of negative charge must be equal. This means that there are equal numbers of protons and electrons in the atom. This is what makes the atom neutral.

A neutral atom is an atom that has no electrical charge. An atom is neutral because it has the same amount of positively charged protons and negatively charged electrons. The nucleus of an atom contains protons, which are positively charged particles. Electrons, which are negatively charged particles, are located in the atom's electron cloud around the nucleus.

Electrons, protons, and neutrons are the three components of atoms. Electrons are negatively charged, protons are positively charged, and neutrons have no charge. Electrons are found outside the nucleus of the atom and are continually moving at high speeds.

In summary, if the illustration of Thomson's atom represents a neutral atom, then the total amount of positive charge and the total amount of negative charge must be equal. This means that there are equal numbers of protons and electrons in the atom. This is what makes the atom neutral.

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The per cent ionization of the solution is 0.017%. The steps involved are;

Write the reaction equation

Setup the ICE table

make the necessary calculation

The equation of the reaction is as follows;

CH₃CH₂CH₂COOH(aq)  ⇄ \(H^{aq}\)  + CH₃CH₂CH₂COO\(^{-aq}\)

I       0.0075                               0                0.085

C    -x                                        +x             + x

E     0.0075 - x                               x               0.085 + x

The Ka of the acid = 1.5 x 10⁻⁵

Hence;

1.5 x 10⁻⁵ = x(0.085 + x)/0.0075 - x

1.5 x 10⁻⁵ (0.0075 - x ) =  x(0.085 + x)

1.1 x 10⁻⁷ - 1.5 x 10⁻⁵ˣ = 0.085x + x²

x² + 0.085x - 1.1 x 10⁻⁷ = 0

x = 0.0000013 M

Percent ionization=  0.0000013 M/0.0075 × 100/1

= 0.017%

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Answer:

10 electrons max

Explanation:

I hope this helps

Answer:

The nucleus

Explanation: bohr tells us that the electrons which have a negative charge clicle the orbits in specific nucleus