How many people were considered undernourished in Latin America and the Caribbean in 2018?

Question 4 options:

513.9 million


2.6 million


821.6 million


42.5 million

Hey dear,

Benzene is a 6-C cyclic structure with alternate double bonds.

● Reactions -

1) Benzene to cyclohexane -

Benzene can be reduced to cyclohexane with

the help of Ni/H2. C6H6 + 3H2 --> C6H12

All 3 double bonds in ring are reduced here.

2) Benzene to benzoquinone - Benzene can be oxidized to benzoquinone with

the help of acidic K2Cr207. C6H6 +3[O] --> C6H4O2 + H2O

Only 1 double bond is lost in this reaction.

Hope this helps you.

The pH of the buffer prepared by adding 275 mL of .676M of HCl to 500 mL of .525M sodium acetate is 6.45.

The pH of a buffer solution can be calculated by initially calculating the millimoles of both the conjugate base and acid.

From, Henderson Hasselbalch equation,

pH = pKa + log conjugate base/acid

pka of HCl = -6.3

-6.3 + log 262.5/185.9

6.3 + 0.15

pH = 6.45

Therefore, the pH of the buffer prepared by adding 275 mL of .676M of HCl to 500 mL of .525M sodium acetate is 6.45.

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The name of the covalent compound NH3 O2 is dihydroxylamine.

According to the task content;

On this note, the compound possesses 2 oxygen atoms, 3 Hydrogen atoms and 1 Nitrogen atom. Hence, the name of the covalent compound is Dihydroxylamine.

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Answer:

That’s because of the law of conservation of energy, which states that: Energy cannot be created or destroyed.

Explanation:

Energy may change form during a chemical reaction. For example, energy may change from chemical energy to heat energy when gas burns in a furnace. The exact amount of energy remains after the reaction as before.

Answer:

Explanation:

Calculate the pOH for a solution that has a hydroxide ion, (OH-) concentration of 5.02 X 10-4 M.

Calculate the pH.

Note: the answers should have three significant figures

The molarity of a solution that contains 35.00 g of CuSO4 dissolved in 250.0 mL of water is 0.88M.

The molarity of a solution can be calculated using the following formula:

Molarity = no of moles/volume

According to this question, a solution consists of 35.00 g of CuSO4 dissolved in 250.0 mL of water.

no.of moles of CuSO4 = 35g ÷ 159.6g/mol

no. of moles of CuSO4 = 0.22 moles

Therefore; molarity of CuSO4 solution is calculated as follows:

M = 0.22 ÷ 0.25

M = 0.88M

Therefore, the molarity of a solution that contains 35.00 g of CuSO4 dissolved in 250.0 mL of water is 0.88M.

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Answer: its supposed to be  18.78%.

Explanation:

Answer:

Growing population

The worlds developing regions will see 1.2 billion people added, a 20.7% increase; while the population of developed countries will increase a mere 3.3% adding 41 million to the current 1.3 billion people.

The man has been missing for two days. The average temperature the previous 48 hours was 50° fahrenheit. 12-24 hours is the time. body was discovered.

Time is the ongoing progression of existence and things that happen in what seems to be an irrevocable order from the past, present, and forward into the future. It is a quantity that is a part of several measurements that are used to compare the length of events or the gaps between them.

To compare how long they last, to order events, and to measure how quickly things change in the real world or in our conscious experience. Along with the three spatial dimensions, time is frequently referred to as an a fourth dimension. A body was discovered in the woods. The man has been missing for two days. The average temperature the previous 48 hours was 50° fahrenheit. 12-24 hours, body was discovered.

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Answer:

Explanation:

pls brainlest meh

Answer:

0.87708moldm-3

Explanation:

[tex]molar \: mass \: of \: cuso4 = 63.55 + 32.07 + 4(16.00) \\ =159.62gmol {}^{ - 1} \\ mole(n) = \frac{mass}{molar \: mass } \\ n = \frac{35}{159.62} \\ n = 0.21927mol \\ molarity = \frac{n}{v} \\ molarity = \frac{0.21927}{0.25} \\ molarity = 0.87708moldm {}^{ - 3} [/tex]

Answer:

Peptide Bonds

Explanation:

Peptide bonds are formed by a biochemical reaction that extracts a water molecule as it joins the amino group of one amino acid to the carboxyl group of a neighboring amino acid.

Answer:

4.002602

Explanation:

the average that reflects the typical ratio of natural abundances of its isotopes.

The weight of 5 helium atoms in grams is 20.01301 grams.

Atoms are defined as the smallest unit into which matter can divided without the release of electrically charged particles.

It is also defined as a building block of matter and were discovered after big bang theory.  It is a fundamental piece of matter.

The weight of 1 helium atom = 4.002602 g

So, the weight of 5 helium atom = 4.002602 x 5

                                                      = 20.01301 g

Thus, the weight of 5 helium atoms in grams is 20.01301 grams.

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For a reaction rate that increases by a factor of 655 in the presence of a catalyst at 37°C, the activation energy of the new pathway  is mathematically given as

Ea2=89.28JKoule/mol

Generally, the equation for the rate constant  is mathematically given as

K=Ae^{Ea1/Rt}

Therefore

[tex]\frac{1}{655}=\frac{1}{8.31*3.10}(Ea2-105000)[/tex]

Ea2=89286.083Joule/mol

In conclusion, the activation energy

Ea2=89.28JKoule/mol

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The enthalpy refers to the thermodynamic characteristics that have chemical systems associated with their internal energy.

The enthalpy refers to the thermodynamic features of the chemical systems associated with the energy of such systems.

Enthalpy is used to estimate the ability of the system to perform work and release energy in the form of heat.

It is well known that different types of chemical reactions may exhibit different enthalpies, which can be estimated by the internal energy, pressure of the system and volume.

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Answer:

Here you are <3

Explanation:

I attached the one I just submitted

Answer:

pasture/range

Explanation:

this is because more than 1/3 of the country's land is being used for this mean alone.

Answer: Forest

Explanation: The largest percentage of land use in the United States is for forests.

Answer:

Trachea is not the part of digestive system

Explanation:

Trachea is the part of the respiratory system

Answer:

chemical energy transgormation takes place during cellular respiration

The amount of heat absorbed in kilojoules when 3.5 moles of water react is 1635.08 KJ

6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂  ΔH = 2803 KJ

From the balanced equation for above,

6 moles of water reacted to absorb 2803 KJ of heat

From the balanced equation for above,

6 moles of water reacted to absorb 2803 KJ of heat

Therefore,

3.5 moles of water will react to absorb = (3.5 × 2803) / 6 = 1635.08 KJ of heat

Thus, 1635.08 KJ of heat were absorbed by the reaction.

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When an electron moves from n = 2 to n = 1, it emits a photon of ultraviolet light.

During transition from n=2 to n=1 in a hydrogen atom, the electron emits energy in the form of photon. We know that when electron absorb energy, it moves from lower level to higher level and vice versa.

So we can conclude that when an electron moves from n = 2 to n = 1, it emits a photon of ultraviolet light.

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Answer:

digital signal

Answer:

Its made of numbers

Explanation:

did the assignment, hope this helps :]

The microbial growth medium that would be used to sample for Fungi bacterial growth in sterile environment is : ( B ) Trypticase soy agar

A growth medium is a solid or liquid which is designed to support the growth of population such as microorganism through cell proliferation. A growth medium contains nutrients which support the growth of the microorganisms.

A growth medium which will support the growth of both fungi and bacteria growth is a Trypticase soy agar medium.

Hence we can conclude that The microbial growth medium that would be used to sample for Fungi bacterial growth in sterile environment is : Trypticase soy agar

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Fission is when the parent atom splits into two daughter products. Whereas atom with a mass number is lower by 4 and an atomic number is lower by 2.

Fission outcomes emit beta radiation, while actinides mainly emit alpha radiation. Many of each also radiate gamma radiation.

The beta decays form an isobaric, fission-product decay chain for each mass number.

Thus, Fission is when the parent atom splits into two daughter products.

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Answer:

chemical equilibrium, condition in the course of a reversible chemical reaction in which no net change in the amounts of reactants and products occurs. A reversible chemical reaction is one in which the products, as soon as they formed, react to produce the original reactants.

Explanation:

chemical equilibrium is the state in which both reactants and products are present in concentrations which have no further tendency to change with time, so that there is no observable change in the properties of the system.

Answer: 0.109 mol

Explanation:

Balanced chemical equation:

3 Na(s) + AlCl3(aq) --> 3 NaCl(aq) + Al(s)

3 moles of sodium metal react with 1 mole of aluminum chloride to produce 3 moles of aluminum chloride and 1 mole of solid aluminum

Molar mass of Na = 22.99 g/mol

Mass(Na) = 7.5 g

Find number of moles of Na:

n = mass of Na/molar mass of Na

=(7.5 g)/(22.99 g/mol)

= 0.3262 mol

Molar mass of AlCl3,

MM = 1*MM(Al) + 3*MM(Cl)

= 1*26.98 + 3*35.45

= 133.33 g/mol

Mass(AlCl3) = 20.0 g

Find number of moles of AlCl3,

n = mass of AlCl3/molar mass of AlCl3

=(20 g)/(1.333*10^2 g/mol)

= 0.15 mol

Balanced chemical equation is:

3 Na + AlCl3 ---> Al + 3 NaCl

3 mol of Na reacts with 1 mol of AlCl3

for 0.3262 mol of Na, 0.1087 mol of AlCl3 is required

But we have 0.15 mol of AlCl3

So, Na is the limiting reagent and we will use it in our further calculations.

According to balanced equation:

mol of Al formed = (1/3) * moles of Na

= (1/3)*0.3262

= 0.1087 mol

Answer: 0.109 mol of aluminum will precipitate out as a result of the reaction

The complete statement is  "Bacteria contribute to the nitrogen cycle by removing nitrogen from the air and converting it into a form that is usable by plants." This is further explained below.

Generally, Bacteria are mono-celled tiny creatures that can be beneficial. Bacteria are germs with a simpler cell structure than many other creatures.

In conclusion, Bacteria contribute to the nitrogen cycle by removing nitrogen from the air and converting it.

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Answer:bacteria

Explanation:

If 0.380 mol of barium nitrate is allowed to react with an excess of phosphoric acid, 0.127 moles of barium phosphate could be formed.

The number of moles of a compound can be calculated stoichiometrically as follows:

Based on this question, the following chemical equation is given:

Ba (NO3)2+ H3PO4 → Ba3(PO4)2+ HNO3

The balanced equation is as follows:

3Ba(NO3)2 + 2H3PO4 → Ba3(PO4)2 + 6HNO3

3 moles of barium nitrate produces 1 mole of barium phosphate

Therefore, 0.380 moles of barium nitrate will produce 0.380/3 = 0.127moles of barium phosphate.

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Answer:

76.86g

Explanation:

the molar mass of sulfur trioxide is about 80.06, so 80.06 grams per mol, 0.96*80.06=76.86g