Which statement about the population shown in this graph is true?


There is nothing controlling population growth.


The population is not continuing to grow because it has reached its carrying capacity.


The number of individuals will continue to increase rapidly.

The number of individuals will decrease until there are none left.

Answer: C = 2, D = 6, E = 1

Explanation:

Na is the first element in the 3s row of the s block on the periodic table, meaning that the exponent (E) will be 1.

C is 2 because, to get to Na, you need to fill the orbitals previous. To fill the 2s row, you need an exponent of 2.

D is 6 because you need to fill the 2s row of the s block.

The empirical formula of the compound with 14.3% Nitrogen, 4.1% Hydrogen, and 81.6% Bromine would be [tex]NH_4Br[/tex].

The compound contains 3 atoms of different elements according to the following percentage:

Let's find the mole equivalent of each percentage:

Divide by the smallest mole:

Thus, the empirical formula of the compound is [tex]NH_4Br[/tex].

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Answer:

The first image = double replacement

Second = single replacement

Third = Decomposition

Fourth = Combination

Explanation:

1. a color from each pair is being swapped and replacing each other so there is a double replacement

2. only the blue and the red are changing places so it is single replacement

3. the pair is being separated (decomposed)

4. the red and green are coming together (combined)

C₂H₅OC₂H₅ (Diethyl ether) has the highest viscosity at same temperature.

The order of viscosity possessed by the different fluids at same temperature is given below.

C₂H₅OC₂H₅ (Diethyl ether)

H₂NCH₂CH₂NH₂ (Ethylene diamine)

CH₃CH₂Cl (Chloroethane)

CH₃CH₂CH₂NH₂ (propan-1-amine)

All the above molecules form hydrogen bonding. As, the viscosity could be directly related to hydrogen bonding tendency, ethylene diamine will be more viscous at a given temperature, as it could form hydrogen bonding through two NH₂ groups.

Viscosity is defined as the resistance of a fluid (liquid or gas) to a change in shape, or movement of neighboring portions relative to one another. Viscosity represents opposition to flow. The reciprocal of the viscosity is defined as the fluidity, a measure of the ease of flow.

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use the formula     [H3O+] = 10^-pH

plug in the pH    [H3O+] = 10^-7.5

so    [H3O+] = 3.162*10^-8 M

Answer:

It looks like the equation is already balanced for you, so the first step will be to convert 144.1 grams of HNO3 to moles.

Inter-conversion of glucose and fructose occurs with an equilibrium constant of 1.0. Glucose isomerase catalyzes this reaction. The final concentration of fructose at equilibrium from 40mM glucose is a. 40 mM.

Using this formula to find the  final concentration of fructose

Final concentration of fructose  =Equilibrium from glucose/ Equilibrium constant

Where:

Equilibrium constant = 1.0

Equilibrium from glucose = 40 mM

Let plug in the formula

Final concentration of fructose  = 40mM / 1.0

Final concentration of fructose  =  40mM

Therefore we can conclude that the correct option is A.

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The complete question is:

Inter-conversion of glucose and fructose occurs with an equilibrium constant of 1.0. Glucose isomerase catalyzes this reaction. The final concentration of fructose at equilibrium from 40mM glucose is

a. 40 mM

b. 20 mM

c. 10 mM

d. 0 mM​

Answer: Sodium and Chlorine

Explanation: I think it's right

In plate tectonics, lithosphere which is made up of the crust and upper mantle—is broken into large rocky plates. These plates lie on top of a partially molten layer of rock called the asthenosphere.

Plate tectonics is a scientific theory that explains how major landforms are created as a result of Earth’s subterranean movements. The theory, which solidified in the 1960s, transformed the earth sciences by explaining many phenomena, including mountain building events, volcanoes, and earthquakes.

In plate tectonics, Earth’s outermost layer, or lithosphere—made up of the crust and upper mantle—is broken into large rocky plates. These plates lie on top of a partially molten layer of rock called the asthenosphere. Due to the convection of the asthenosphere and lithosphere, the plates move relative to each other at different rates, from two to 15 centimeters (one to six inches) per year.

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56) The Aufbau principle has been violated. Option C

57) Hund's rule was violated. Option A

58) This is a valid orbital diagram. Option D

We know that as we fill the electrons in to the atoms of the elements there bare some rules that we have to observe in the process and all of these rules are the things that make up what we call the Aufbau principle.

In effect one of the rules that we ought to know is the Pauli  exclusion principle that states that electrons  do not have the same values for all the four quantum numbers.

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For a cylinder containing 7.00 grams of helium and a moveable piston. If the capacity was adjusted from 8 l to 12.7 l, the ultimate quantity of moles inside the cylinder would be 11.110 l.

Describe a cylinder?

The three-dimensional shape of a cylinder is made up of two parallel round base connected by a curved surface. The right cylinder is formed when the circular bases' centres cross each other. Right cylinders have parts that are parallel to the planes that include the bases; otherwise, they are referred to as oblique cylinders.

A round cylinder is what?

The circular cylinder is a cylinder with circular bases that are parallel to one another. Three dimensions are involved.

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Answer:

2.04 moles

Explanation:

1 liter = 1 [tex]dm^{3}[/tex]

and at S.T.P (standard temperature and pressure) one mole of any gas occupies 22.414 [tex]dm^{3}[/tex]

setting up mole and volume ratio

moles   :   volume

   1        :    22.414

   X       :    45.8

X = 45.8/22.414

X = 2.04 moles

Magnesium is less reactive than the elements of group 1.

Before we get into the question, it is good that we know what we mean by reactivity in chemistry. When we use the term reactivity, we are trying to look at how two or more substances can be able to combine together.

We know that the reactivity of the metals would depend on the position of the metals in the electrochemical series as well as the position of the metal  in the perioidic table of the elements.

Given that the atoms of the elements that we have in group 1 are more electro positive than magnesium, they are going to be much more reactive than the element magnesium and this is evidence by the reduction potentials of the elements that we can easily see from the standard tables.

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The right side of the heart receives oxygen poor blood from the veins and pumps it to your lungs where it picks up oxygen and gets rid of carbon dioxide. The left side of the heart receives oxygen rich blood from the lungs and pumps it through  arteries to the rest of the body.

It's the muscle at the centre of your circulation system pumping blood around your body as your heart beats. This blood sends oxygen and nutrients to all parts of your body and carries away unwanted carbon dioxide and waste products.

Therefore,the heart sends blood around your body. The blood provides your body with the oxygen and nutrients it needs. It also carries away waste. Your heart is sort of like a pump or two pumps in one.

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The chemist weighed out 0.2 moles of aluminum.

To calculate the number of moles of aluminum, we need to use the formula:

moles = mass / molar mass

The molar mass of aluminum is 27 g/mol. Therefore, the number of moles of aluminum in 5.4 g can be calculated as:

moles = 5.4 g / 27 g/mol = 0.2 (mol)

So the chemist weighed out 0.2 moles of aluminum.

It is important to note that the number of moles should have the same number of significant digits as the mass measured.

According to the law of reciprocal proportions, they should combine in the ratio of 10.24:7.92:1.29 by mass.

According to the law of reciprocal proportions when two elements join to form more than one compound, the weights of one element that combine with a fixed weight of the another are in a ratio of small whole numbers.

In phosphine, phosphorus = 91.1 parts and hydrogen = 8.9 parts

So, 8.9 pads of hydrogen combine with phosphorus = 91.1 parts .

1 part of hydrogen combine =  91.1 / 8.9

= 10.24 parts

Similarly,

for water 88.8 / 11.2

= 7.92 parts of hydrogen

For Phosphorus tetra oxide

= 56.4 / 43.6

= 1.29 parts

Thus, According to the law of reciprocal proportions, they should combine in the ratio of 10.24:7.92:1.29 by mass.

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Answer:

Explanation:

Atoms of sodium and chlorine are both elements, meaning they are made up of only one type of atom. Both have an atomic number of 11, which means they have 11 protons in their nucleus, but the number of neutrons and electrons differ. Sodium has 12 neutrons and 11 electrons, while chlorine has 17 neutrons and 17 electrons.

Atoms of sodium and chlorine are also both reactive, meaning they form chemical bonds with other elements. However, sodium is more reactive than chlorine, which is why it often forms compounds with other elements, such as sodium chloride (NaCl).

Atoms of sodium and chlorine are also similar in that they both have the same number of electrons in their outer shells. This means they can both form two covalent bonds with other elements. However, because the number of electrons and neutrons in each atom is different, the strength of the bonds they form will differ.

Overall, atoms of sodium and chlorine are similar in that they both have 11 protons and can form two covalent bonds, but they differ in their number of neutrons and electrons, which affects the strength of the bonds they form and their reactivity.

An unsaturated hydrocarbon propene undergoes Markovnikov's rule to give (A) 2- bromo, propane is formed. 2- bromo, propane is hydrolyzed with aqueous alkali to yield (B) propane is produced.

Markovnikov's rule states that when an asymmetrical substance is added to an asymmetrical alkene, then the negative part of the reagent will attach to the carbon atom containing less number of hydrogen atoms.

An unsaturated hydrocarbon propene undergoes Markovnikov's rule to give (A) 2- bromo, propane is formed. 2- bromo, propane is hydrolyzed with aqueous alkali to yield (B) propane is produced. When propane is treated with PBr3, compound (C) 1, bromo- propane is produced. 1, bromo- propane reacts with AgCN (alc.) to give another compound (D) 1 cyano propane. The compound (D) if reduced with LiAlH4, produce (E) propane.

When E react with nitrous acid nitro propane is formed.

Thus, 2- bromo, propane is hydrolyzed with aqueous alkali to yield (B) propane is produced.

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The volume of the water is obtained as 72 mL.

We know that the heat of vaporization is the heat that is required to raise convert the substance from the liquid state to the gaseous state. Now, we know that we can be able to find the energy from the use of the formula;

H = mL

H = heat that is required

m = Number of moles of the object

L = Heat of vaporization

We know from the problem that we have that;

H = 163 kJ

L = 40.66 kJ/mol

Then we would have;

Number of moles = H/L

= 163kJ/40.66 kJ/mol

=  4 moles

Mass of water = 4 moles * 18 g/mol = 72 g

Since the density of water = 1 g/mL

Volume = Density * mass

= 1 g/mL * 72 g

= 72 mL

Thus, the volume of the water that would be vaporized in the process that we have described is about a volume of 72 mL.

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The pressure of a gas that supports a 571 mm column of di‑n‑butyl phthalate is 31.85 torr.

According to the ideal gas equation

P × V = n × R × T

According to Stoichiometry n = m ÷ M or n m ÷ A

P × V = n × R × T

P × V = (m/M) × R × T

P × M = (m/V) × R × T

P × M = ρ  × R × T

For mercury

For C₁₆H₂₂O₄

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The organic compound di‑n‑butyl phthalate, C16H22O4(l), is sometimes used as a low‑density (1.046 g⋅mL−1) manometer fluid.31.85 torr is the pressure in torr of a gas that supports a 571 mm column of di‑n‑butyl phthalate. The density of mercury is 13.53 g⋅mL−1.

The ideal gas equation is represented as: PV = nRT.

In this equation, P refers to the pressure of the ideal gas, V is the volume of the ideal gas, n is the total amount of ideal gas that is measured in terms of moles, R is the universal gas constant, and T is the temperature.

By an ideal gas equation

P × V = n × R × T

Where,

n = number of moles (mol)

R = gas constant

The value of R differs depending on the units used

T = temperature

P = pressure

V = volume

According to Stoichiometry

n = m ÷ M or n m ÷ A

Where,

m = mass (grams)

M = molecular mass (g/mol)

A = atomic mass (g/mol)

A for mercury (Hg) = 200.59 g/mol

A to C = 12 g/mol

A for H = 1 g/mol

A for O = 16 g/mol

M for C₁₆H₂₂O₄

= (16 × 12) + (22 × 1) + (4 × 16)

= 192 + 22 + 64

= 278

P × V = n × R × T

P × V = (m/M) × R × T

P × M = (m/V) × R × T

The formula for density

ρ = m/V

ρ = density

P × M = ρ  × R × T

For mercury

For 1 mm mercury, the pressure is 1 torr

h = 571 mm

P mercury = 571 mm × 1 torr

P mercury = 571 torr

ρ = 13.53 g/mL

P × M = ρ  × R × T

P × A = ρ  × R × T

571 × 200.59 = 13.53  × R × T

RT = 114,536.89 / 13.53

RT = 8,465.402 torr mL mol⁻¹

For C₁₆H₂₂O₄,

RT = 8,465.402 torr mL mol⁻¹ because same condition as mercury

ρ = 1.046 g/mL

P × M = ρ  × R × T

P × 278 = 1.046  × 8,465.402

P = 8,854.81 / 278

P = 31.85 torr

Thus, 31.85 torr is the pressure in torr of a gas that supports a 571 mm column of di‑n‑butyl phthalate. The density of mercury is 13.53 g⋅mL−1.

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Answer:

The number and variety of plants would increase.

Explanation:

A is incorrect because if deer eat plants and the population of deer are increased there wouldn't be an increase of plants. There would be a decrease of plants be ause there would be more deer eating plants. B is incorrect because if there are more deer, then the amount of plants will also decrease. C is correct because with a surplus of deer, the amount of plants would decrease because of all the deer. Therefore, the variety of plants would decrease because they are being eaten. D is incorrect because if there is a population growth of deer, that means more deer are eating the plants. So, the plant population would decrease.

Hope this helps! :)

In a forest, deer eat plants for survival.The number and variety of plants would increase in the deer population to affect the plant life of an ecosystem. Therefore, option A is correct.

An ecosystem is a geographical area in which plants, animals, and other organisms, as well as weather and landscape, coexist to form a life bubble. Ecosystems contain both biotic (living) and abiotic (nonliving) components.

An ecosystem is a group of living organisms (plants, animals, and microbes) in a specific location. The term 'eco' refers to a region of the world, and the term'system' refers to the organizing units.

Because deer eat a wide variety of plants, the plant population would suffer as a result. More deer necessitates more food. Plant predation by deer populations would reduce the population of other animals that eat plants and plant seeds.

Thus, option A is correct.

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This molecule is known as 2-(Phenylethyl) tetrahydrofuran.

Benzene is a colourless liquid chemical at room temperature. It is utilised primarily as a solvent in the pharmaceutical and chemical industries, as a starting material and an intermediate in the synthesis of numerous chemicals, and in gasoline. Both natural and man-made processes produce benzene.

Benzene is one of the most important organic compounds with the chemical formula C₆H₆. Benzene is the parent compound of various aromatic compounds.

2-(Phenylethyl) tetrahydrofuran has a ring structure of benzene (C₆H₅), and an alkyl group (CH₂CH₃) attached to it. The molecule has a total of 16 carbon atoms and 33 hydrogen atoms.

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Beaker 1 would have a temperature of 22 degrees Celsius and a volume of 50 mL.

Temperature is a physical property of matter that quantitatively expresses hot and cold. It is measured in Kelvin, Celsius, or Fahrenheit. Temperature is important in many physical, chemical, and biological processes. In thermodynamics, temperature is a measure of the average kinetic energy of the microscopic particles that make up a substance. It is related to the average energy of microscopic random motion of the particles that make up a substance. Increasing the temperature of a substance increases its average kinetic energy and vice versa. Temperature is a measure of the intensity of heat, and it is used to compare the relative hotness or coldness of an object. Temperature can also be used to measure the amount of energy being transferred between two objects or systems.

Beaker 2 would have a temperature of 20 degrees Celsius and a volume of 50 mL.

Beaker 3 would have a temperature of 15 degrees Celsius and a volume of 50 mL.

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Answer:

The value of pOH of a solution is 2.28

We need to find the [OH-] in a solution. We know that,

pOH=-\text{log}[OH^-]pOH=−log[OH−]

Put all the values,

\begin{gathered}2.28=-\log[OH^-]\\\\=0.00524\end{gathered}2.28=−log[OH−]=0.00524

So

The signal-to-noise ratio (S/N) is a measure of the strength of the signal relative to the noise. In this case, the signal is the absorbance reading of 0.002 absorbance units, and the noise is the standard deviation of the noise, which is 0.0005 absorbance units.

The S/N for the 1 cm path length measurement is:

S/N = (signal) / (noise) = 0.002 absorbance units / 0.0005 absorbance units = 4

If the path length is increased to 5 cm and the number of scans is increased to 65, the signal will also increase by a factor of 5, but the noise will not change. Therefore, the signal will be 5 times larger and the noise will be the same, so the S/N will increase.

The signal for the new measurement is 5 * 0.002 = 0.01 absorbance units

The S/N for the new measurement is:

S/N = (signal) / (noise) = 0.01 absorbance units / 0.0005 absorbance units = 20

When you increase the path length by 5 times, the signal increases by 5 times, but the noise remains the same. Therefore, the signal-to-noise ratio will increase by a factor of 5. Similarly when you increase the number of scans, you are averaging the signal, which will reduce the noise, but the signal will remain the same. So the signal-to-noise ratio will increase.

Answer:

a)0.1moles

b)2.99moles

c)0.5moles

expressed in molar mass

a)26g/mol

b)14g/mol

c)17g/mol

Explanation:

remember

1mole=6.02×10^23

Answer:

the evidence statement contains reasoning.

Explanation:

the reason that this piece of information is reasoning rather than evidence is because it doesn't tell us the temperatures of the other substances (if any.) if we look at this substance and it has the most constant temperature compared to the others, how will we know if it is the most constant if we don't know the other substances' data?

this is reasoning because the evidence should tell us more about the substance and the others.

Answer:

Explanation: Tungsten carbide is formed by the reaction of tungsten (W) and carbon (C) to form tungsten carbide (WC). The balanced equation for the reaction is W + C → WC.

We know that the number of moles of a substance can be calculated using the formula:

moles = mass / molar mass

We also know that the law of conservation of mass states that the total mass of the reactants must equal the total mass of the products. We can use this principle to balance chemical equations.

In this case, we have 1.25 moles of carbon and an unknown number of moles of tungsten. We know that for every 1 mole of carbon, we need 1 mole of tungsten to produce 1 mole of tungsten carbide.

To determine the number of moles of tungsten carbide produced, we can set up the following proportion:

1.25 moles C / 1 mole C = x moles W / 1 mole W

Where x is the number of moles of tungsten needed.

Solving for x, we get x = 1.25 moles W

So, 1.25 moles of tungsten reacts with 1.25 moles of carbon to produce 1.25 moles of tungsten carbide.