What may cause a species to become less genetically diverse?
A. Isolation from members of its species
B. Low population numbers
C. Both isolation and low population numbers
D. None of these
"science"

Spectrophotometer measures the amount of light absorbed or reflected by a sample solution.

A spectrophotometer is a device used to measure the amount of light a sample solution absorbs or reflects.

It works by shining a beam of light onto a sample solution and then measuring the intensity of the light that is reflected or absorbed.

The light used is typically in the visible spectrum, such as white light, but may also include ultraviolet or infrared light, depending on the application.

The intensity of the light is usually measured in terms of percent transmission or percent reflectance.

To measure the amount of light absorbed or reflected, the sample is placed into a cuvette, a special container designed to hold samples for spectrophotometry.

The light is then shined through the cuvette and onto a detector, which measures the intensity of the light that passes through the sample.

The detector then produces a numerical reading that is directly proportional to the amount of light absorbed by the sample.

spectrophotometer measures the amount of light absorbed or reflected by a sample solution.

It does this by shining a beam of light through the sample solution and then measuring the intensity of the light that passes through it.

The intensity of the light is measured in terms of percent transmission or percent reflectance, which is then used to calculate the amount of light absorbed or reflected by the sample.

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The number of ions present in the soil cannot be determined based solely on its hydrogen ion concentration, which is a measure of acidity. Instead, the soil's chemical composition, which is influenced by its parent material and other factors, is the most important determinant of the ions present in it.

Soil A has 10-4 and Soil B has 10-5 hydrogen concentration. We need to find out the ions present in the soils A and B. Let’s calculate the hydrogen ion concentration in the two soils.A hydrogen ion concentration of 10-4 means that 10-4 moles of hydrogen ions are present in a liter of solution. Similarly, a hydrogen ion concentration of 10-5 means that 10-5 moles of hydrogen ions are present in a liter of solution. Soil A has a higher concentration of hydrogen ions than Soil B. As the concentration of hydrogen ions decreases, the pH of the soil increases. Therefore, Soil A has a lower pH than Soil B.The ions present in the soil are determined by the soil's chemical composition, which is influenced by the soil's parent material, weathering, and other factors.

Soil is made up of a variety of ions, including calcium, magnesium, potassium, and sodium. The number of ions present in the soils A and B cannot be determined based solely on their hydrogen ion concentrations of 10-4 and 10-5, respectively. The soil's chemical composition, which is influenced by its parent material and other factors, is the most important determinant of the ions present in it.Therefore, the number of ions present in the soil cannot be determined based solely on its hydrogen ion concentration, which is a measure of acidity. Instead, the soil's chemical composition, which is influenced by its parent material and other factors, is the most important determinant of the ions present in it.

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The quantity of deer is a dependent variable, whereas time is an independent variable.

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Answer:

identify the atoms on each side

count the atoms on its side

use coefficients to increase the atoms on each side

check to make sure you have the same number of each type of atom on each side

Answer:

3,4,2,1

Explanation:

By using the ideal gas law to get volume we have"

Where v is volume, T is temperatute, n is number of moles, R is the molar gas constant and P is pressure. At STP P= 101,325 Pa, T= 273.15 K and R= 8.314 J/mol K

We must first convert mass to moles:

By substituting this value into the ideal gas law we have:

1.9502e-6L of H2 gas reacted at STP

Answer: Theres nothing to see here

Explanation: nothing at all,

To determine the specific heat of a metal with a mass of 23.4 g and a heat capacity of 6.18 J/°C, you need to use the following formula:

Specific heat (c) = Heat capacity (C) / Mass (m)

Given the mass (m) of the metal is 23.4 g and the heat capacity (C) is 6.18 J/°C, you can plug these values into the formula:

Specific heat (c) = 6.18 J/°C / 23.4 g

Next, perform the division:

Specific heat (c) = 0.2641 J/(g°C)

The specific heat of the metal is approximately 0.2641 J/(g°C). The unit of specific heat is joules per gram per degree Celsius (J/g°C).

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The resulting solution will have a pH of 11.95, which is basic.

To determine the pH of the resulting solution, we first need to calculate the moles of NaOH added.

moles of NaOH = concentration x volume

= 0.010 mol/L x 9.6 mL/1000 mL

= 9.6 x \(10^{-5\) mol

Next, we need to calculate the molarity of the resulting solution after the NaOH is added.

Molarity = moles of solute / volume of solution in liters

Volume of solution = volume of NaOH + volume of water

= 9.6 mL + 20 mL

= 29.6 mL

= 0.0296 L

Molarity = 9.6 x  \(10^{-5\)mol / 0.0296 L

= 0.00324 mol/L

The pH of a basic solution can be determined using the formula:

pH = 14 - log [OH-]

where [OH-] is the concentration of hydroxide ions in moles per liter.

[OH-] = concentration of NaOH added / total volume of resulting solution

[OH-] = 0.010 mol/L x 9.6 mL / 1000 mL / 0.0296 L

= 3.24 x  \(10^{-4\\\) mol/L

pH = 14 - log (3.24 x \(10^{-4\\\) )

= 11.95

Therefore, the resulting solution will have a pH of 11.95, which is basic.

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545mm Hg in Kilopascals is 72.6607

I hope this helps you. Good luck stay safe, healthy and, happy!<3

Group IA are metals and all react vigorously because they have 1 valence electron in their outer most shell and the reactivity increases as you go down the group. Group VIIIA are non reactive because of their complete valence shell.

Molecule is defined as number of atoms combined together, that shows the most smaller chemical compound's fundamental unit that participate in chemical reaction. In the combination of atoms attractive forces play a vital role and it helps to bound the atoms by a chemical bond.

Liquid consist of small range of order and the reason behind this is intermolecular attractive force which is very strong and due to this reason molecules are packed together tightly. Due to presence of high kinetic energy the molecules present in the liquid move rapidly and fastly  with one another.

Water is considered to be the simpler molecule and it consist of hydrogen and oxygen atom bounded together and due to the reason of high electronegativity of the oxygen's atom the bonds present are polar as well as covalent.  Due to presence of high kinetic energy the molecules present in the liquid move rapidly and fastly  with one another.

Therefore,Group IA are metals and all react vigorously because they have 1 valence electron in their outer most shell and the reactivity increases as you go down the group. Group VIIIA are non reactive because of their complete valence shell.

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Answer: Dependant variable = The distance it takes for each car to stop.  Independent variable = Both cars go at 60 mph.

Explanation:

This is right because the dependant variable changes and the independent variable is the outcome of the dependant variable.

The intermolecular forces in the compound are;

a) Dispersion forces

Dipole forces

Hydrogen bonds

b) Dispersion forces

c)  Dispersion forces

Dipole forces

We know that the term intermolecular forces refers to the kind of forces that acts in other to hold the molecules of a substance together. The kind of the intermolecular forces that holds a substance together is the main determinant of the properties of the compound.

Looking at the atoms that can be found in the compound and the arrangement of the atoms, we can be able to identify the kinds of intermolecular forces that can be found in the compound.

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Answer:

Answer:

See explanation

Explanation:

Ga is in group 13 hence it must loose three electrons to form Ga^3+ in order to achieve the noble gas configuration because it has three electrons on its outermost shell.

O is in group 16 hence it must accept two electrons in order to attain the noble gas configuration to form O^2- since oxygen has six electrons on its outermost shell.

Br in group 17 has seven electrons in its outermost shell hence it must form Br^- (gain one electron) in order to attain the noble gas configuration.

P in group 15 must accept three electrons and form P^3- in order to attain the noble gas configuration since it has five electrons on its outermost shell.

S is in group 16 hence it must accept two electrons in order to attain the noble gas configuration to form S^2- since sulphur has six electrons on its outermost shell.

Mg in group 2 has two electrons on its outermost shell and must loose both to attain the noble gas configuration forming Mg^2+.

Al is in group 13 hence it must loose three electrons to form Al^3+ in order to achieve the noble gas configuration because it has three electrons on its outermost shell.

Se is in group 16 hence it must accept two electrons in order to attain the noble gas configuration to form Se^2- since selenium has six electrons on its outermost shell.

Lithium is in group 1 and must loose its only outermost electron in order to attain the noble gas configuration to form Li^+.

Rb is in group 1 and must loose its only outermost electron in order to attain the noble gas configuration to form Rb^+.

As in group 15 must accept three electrons and form As^3- in order to attain the noble gas configuration since it has five electrons on its outermost shell.

I in group 17 has seven electrons in its outermost shell hence it must form I^- (gain one electron) in order to attain the noble gas configuration.

Explanation:

The five conditions of chemical change: color change, formation of a precipitate, formation of a gas, odor change, temperature change

Answer:

One mole of carbon contains 6.02 × 10²³ atoms. This number is called Avogadro number. Then, the number of atoms in  4.31 moles of carbon is 2.59 × 10²⁴ atoms.

One mole of a substance is its amount containing 6.02 × 10²³  atoms or molecules. This number is called Avogadro number. One mole of all elements contains an Avogadro number of atoms.

Similarly, one mole of every compound contains 6.02 × 10²³  molecules. The mass of one mole of compound is called its molar mass.

C is the 6th element in the periodic table. C  is a nonmetal.  One mole of C contains 6.02 × 10²³ C atoms. Hence, the number of atoms of 6.53 moles is:

4.31 moles × 6.02 × 10²³ atoms/mol = 2.59 × 10²⁴ atoms

Hence, there will be 2.59 × 10²⁴ carbon atoms in 4.31 moles.

Answer:

47.596008

Explanation:

Answer:

The viscosity of intestinal contents should define the mixing, diffusion and flow of nutrients and other materials in digesta (1–4). The viscosity of intestinal contents has been measured only after the removal of solid particles by centrifugation (5,6), under the assumption that particles or insoluble fibers in the diet do not affect the viscosity of gut contents (7). However, the complete removal of solid particles considerably reduced the coefficient of viscosity of pig cecal contents and changed the contents from a non-Newtonian to a Newtonian fluid in our recent study

Answer:

Polar

Explanation:

Electronegativity Difference:

0.7 Non-Polar Covalent = 0 0 < Polar Covalent < 2 Ionic (Non-Covalent) ≥ 2

Answer:

I. Concrete sidewalks

Explanation:

One of the factor that affects the infiltration of water into the surface of the soil is the use of concrete sidewalks.

Concrete is impermeable and non - porous media

When concrete pavements are used, water will not be able to move into the ground. They run on the surface and collects into nearby streams and water bodies.

Answer:

The answer is Venus. So B

The reason why a much higher concentration of Fe3+ as compared to SCN- was used to prepare the standard solutions of FeNCS2+ is to ensure that the reaction between Fe3+ and SCN- goes to completion.

In the reaction: Fe3+ + SCN- → FeNCS2+, if the concentration of Fe3+ is much higher than that of SCN-, then all of the SCN- will react with the Fe3+ to form FeNCS2+. This ensures that the reaction goes to completion and that the concentration of FeNCS2+ in the solution is known.

If the concentrations of Fe3+ and SCN- were equal, then the reaction may not go to completion and there could be some unreacted Fe3+ or SCN- left in the solution, which would make it difficult to accurately determine the concentration of FeNCS2+.

Therefore, a much higher concentration of Fe3+ as compared to SCN- was used to prepare the standard solutions of FeNCS2+ to ensure that the reaction goes to completion and that the concentration of FeNCS2+ in the solution is known.

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\(90^38\) Sr undergoes beta decay to form \(90^39\) Y with the emission of a beta particle \((0^-1 e)\).

The accurate equation that describes the beta decay of Strontium-90 (Sr-90) is

\(90^38 Sr - > 90^39 Y + 0^-1 e\)

In beta decay, a neutron in the nucleus of an atom is converted into a proton, resulting in the emission of an electron (beta particle). In the case of Sr-90, one of its neutrons is converted into a proton, forming Yttrium-90 (Y-90) and emitting an electron.

The equation represents the conservation of mass number (90) and atomic number (38) on both sides of the reaction.

In the beta decay of Strontium-90 (Sr-90), one of the neutrons in the nucleus undergoes a transformation into a proton. This results in the formation of Yttrium-90 (Y-90) and the emission of a beta particle, which is an electron (0^-1 e). The reaction can be represented as follows:

\(90^38 Sr - > 90^39 Y + 0^-1 e\)

This equation illustrates the conservation of mass number (90) and atomic number (38) on both sides of the reaction.

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(i) CaCO3 CaO + CO2 is the equation for the breakdown process of marble (CaCO3). (ii) Each product will have a mass equal to the weight of the marble used, or 25 g. Therefore, the mass of CaO and CO2 that are produced will both be 25 g.

(iii) The ideal gas law equation, PV = nRT, can be used to determine the volume of gas produced at S.T.P. where P is pressure, V is volume, n is the number of moles of gas, R is the ideal gas constant, and T is temperature.

We can determine the number of moles of CO2 produced using the formula since the mass of CO2 formed is 25 g.n is therefore 25/44 = 0.568 mol. The volume of gas created at STP may now be determined using the ideal gas law equation: V = (0.568 mol)(8.314 J/mol.K)(273 K)/(101.3 kPa) = 16.9 L. As a result, 16.9 L of petrol are produced at STP.

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The isotopes average atomic mass for the element of iron is  55.845 u

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Answer: The correct answer is enzymes lower the activation energy of a chemical reaction.

Explanation:

Elements that are shiny, malleable, ductile, most often solid at room temperature, and good conductors of heat and electricity are known as  metals.

It is defined as a substance which cannot be broken down further into any other substance. Each element is made up of its own type of atom. Due to this reason all elements are different from one another.

Elements can be classified as metals and non-metals. Metals are shiny and conduct electricity and are all solids at room temperature except mercury. Non-metals do not conduct electricity and are mostly gases at room temperature except carbon and sulfur.

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To prove that oxygen is produced during photosynthesis, the following steps must be performed:

Place aquatic plants in a beaker of pond water.

Cover plants with short-stem funnels.

Invert the test tube filled with water to cover the stem of the funnel. Make sure the water level in the beaker is above the height of the funnel when inserting the

test tube.

Expose the device to sunlight.

After several hours, air bubbles form and collect in the test tube.

test the gas in the test tube.

Glowing debris bursts into flames, indicating the presence of oxygen.

Observation: Gas bubbles are seen in the test tube.

Result: Oxygen is produced

Conclusion: Gas bubbles are formed which prove that oxygen is produced by the green plants during photosynthesis

What is photosynthesis ?

Photosynthesis is the process that plants and other organisms use to convert light energy into chemical energy, which is later released through cellular respiration to power the activity of the organism. Some of this chemical energy is stored in carbohydrate molecules such as sugars and starches synthesized from carbon dioxide and water. Hence, photosynthesis is named 'light' and synthesis is named 'assemble'. Most plants, algae, and cyanobacteria perform photosynthesis. Such organisms are called photoautotrophs. Photosynthesis is largely responsible for the production and maintenance of the oxygen content of the Earth's atmosphere and provides most of the energy needed for life on Earth.

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Answer:

Bats eat hundreds of mosquitoes and other annoying insects at night.

Answer:

With no sunlight, photosynthesis would stop, but that would only kill some of the plants—there are some larger trees that can survive for decades without it. Within a few days, however, the temperatures would begin to drop, and any humans left on the planet's surface would die soon after.

Explanation:

With no sunlight, photosynthesis would stop, but that would only kill some of the plants—there are some larger trees that can survive for decades without it. Within a few days, however, the temperatures would begin to drop, and any humans left on the planet's surface would die soon after.