A pure substance that cannot be broken down into simpler substances is called:__________

Explanation:

physical separation technique are based on physical properties of the substance

Answer:

Physical properties

Explanation:

Mixtures can be physically separated by using methods that use differences PHYSICAL PROPERTIES(boiling point, melting point, solubility in a given solvent,etc) to separate the components of the mixture, such as evaporation, distillation, filtration and chromatography.

The net present value (NPV) of the RGM-7000 water filtration system for Caspian Sea Drinks is $3.79 million.

To calculate the net present value (NPV), we need to discount the cash flows associated with the RGM-7000 over its 20-year life using the given discount rate of 9.00%. The formula for NPV is:

NPV = (Cash inflows - Cash outflows) / (1 + Discount rate)^t

Cash inflows:

Additional revenues per year = $2.73 million

Cash outflows:

Operating costs per year = $646,303.00

Initial cost of the RGM-7000 = $14.00 million

Tax rate = 24.00%

To calculate the annual net cash flows, we subtract the operating costs from the additional revenues:

Net cash flows per year = Additional revenues - Operating costs

Next, we calculate the present value of the annual net cash flows for each year using the discount rate of 9.00%:

Present value of net cash flows = Net cash flows / (1 + Discount rate)^t

Finally, we sum up the present values of the net cash flows over the 20-year life of the RGM-7000 and subtract the initial cost:

NPV = Sum of present values - Initial cost

By performing the calculations, the net present value (NPV) of the RGM-7000 for Caspian Sea Drinks is determined to be $3.79 million.

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Water, also known as H2O, is a molecule made up of two hydrogen atoms and one oxygen atom. The bond angles in H2O are known to be small, and this is due to the electron geometry and molecular geometry of the molecule.

The electron geometry of H2O refers to the arrangement of electrons around the central oxygen atom. In H2O, the electron geometry is tetrahedral, meaning that there are four regions of electron density around the central oxygen atom. These regions are formed by the two lone pair electrons on the oxygen atom, and the two shared electrons between the oxygen and hydrogen atoms that make up the chemical bonds.

The molecular geometry of H2O, on the other hand, refers to the arrangement of atoms in the molecule. In H2O, the molecular geometry is bent or angular, with the angle between the two hydrogen atoms and the oxygen atom measuring approximately 104.5 degrees. This is a result of the repulsion between the lone pair electrons and the bonding electrons, which causes the bond angles to be smaller than the ideal tetrahedral angle of 109.5 degrees.

In summary, the small bond angles in H2O are due to the repulsion between the lone pair electrons on the oxygen atom and the shared electrons in the chemical bonds between the oxygen and hydrogen atoms. This causes the molecular geometry of H2O to be bent or angular, rather than the ideal tetrahedral shape.

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Answer:

B

Explanation:

Two species can indirectly compete for the same resource even when they never come in contact with one another if they depend on the same resource but at different times.

An example of indirect competition is for example where two insect feeds on a certain plant during the day and another species feeds on the same plant during the night.

Indirect competition occurs when animals that use the same resource don't necessarily interact with one another, such as cheetahs that are active during the day and leopards that are active at night that shares a watering hole in a grassland savanna.

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Ch3ch(oh)co2h is the chemical formula of lactic acid. In lactic acid, the OH group is located on the second carbon, while the COOH group is located on the first carbon.

Lactic acid is an organic acid that is classified as an alpha-hydroxy acid (AHA) because it has a carboxylic acid group (COOH) and a hydroxyl group (-OH) on adjacent carbon atoms. Lactic acid is a natural component of many foods and is also found in the muscles of animals that perform anaerobic respiration, such as cows and humans. Lactic acid has a chemical formula of C3H6O3.

In lactic acid, the OH group is located on the second carbon, while the COOH group is located on the first carbon. The structure of lactic acid is shown below:

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The image that has been shown is the image of a network solid.

A network solid, often referred to as a covalent network solid or an atomic solid, is a kind of solid in which the individual atoms are connected by a network of covalent connections that runs the length of the structure. Every atom in a network solid is bound to its neighbors, forming a three-dimensional lattice or framework.

Network solids do not contain separate molecules or ions held together by weak intermolecular forces, in contrast to other forms of solids like ionic solids or molecular solids.

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Answer:

Explanation:

network A. my sister had the question just now and she didnt know it so she guested and got it right!! :)

Answer:

Environmental limitations.

Explanation:

The following are thought to be key requirements for a world to have life: A source of energy to fuel metabolism, A source of molecules from which to build living cells, A liquid medium, These are the primary requirements for a world to have life. These requirements are key to the development and sustainability of life on Earth.

Every living organism requires energy to survive, and this energy comes from a variety of sources, including sunlight, food, or chemical reactions. It's necessary to have a source of energy to fuel metabolism, as it helps with the growth, development, and reproduction of an organism.  A source of molecules from which to build living cells

These molecules can include things like amino acids, sugars, and lipids. A liquid medium is essential for life because it provides an environment in which chemical reactions can occur. Most chemical reactions require water to proceed, and water is also the medium in which cells operate. This is why water is considered to be the universal solvent and is an essential component for life on Earth.

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The mass number is the atomic mass rounded to a whole number.

The mass number, can be regarded as the atomic mass number or nucleon number, which can be seen as the total number of protons  as well as neutrons in an atomic nucleus however if it is  approximated , it can be considered to be equal to the atomic mass of the atom expressed in atomic mass units.

It should be noted that the mass number is established by rounding the atomic weight to the nearest whole number.

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Answer:

o2

Explanation:

because Co means carbon dioxide

The value of the reaction quotient, Q, is calculated by substituting the actual initial values of [Ca2+] and [CO₃2-] into the equilibrium expression. The  value of Q is determined by the concentrations of the reactants and products at a given point in the reaction.

To calculate the reaction quotient, you need to follow these steps:
1. Write the balanced chemical equation for the reaction.
2. Determine the initial concentrations of the reactants and products.
3. Substitute these values into the equilibrium expression, which is obtained by writing the expression for the reaction quotient using the concentrations of the reactants and products raised to their stoichiometric coefficients.
4. Calculate the numerical value of Q by plugging in the actual initial concentrations into the equilibrium expression.

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ANSWER

The addition of HCl will shift to reactants

EXPLANATION

When some strong acid is added to a buffer, the equilibrium is shifted to the left, and the hydrogen ion concentration increases by less than expected for the amount of strong acid added. Buffer solution helps in adjusting the pH of a substance.

Since the HCl is a strong acid, it will shift to the left (reactant sides)

Answer:

In the United States today, no federal law prohibits human cloning, either for purposes of reproduction or for purposes of biomedical research.

Explanation:

Answer:

When wood is burned, it undergoes a chemical reaction called combustion, which produces heat, light, and various gases such as carbon dioxide, water vapor, and nitrogen oxides. These gases are released into the air, leaving behind a residue of ash that is much lighter than the original wood. Therefore, option A is the best explanation for what Courtney observes.

The empirical formula for the ccompound, given the data is C₇H₈

The mass OC carbon in the compound can be obtained as follow:

Mass of C = (12 / 44) × 4.10

Mass of C = 1.118 mg

Mass of H = (2 / 18) × 0.959

Mass of H = 0.107 mg

The empirical formula can be obtained as follow:

Divide by their molar mass

C = 1.118 / 12 = 0.093

H = 0.107 / 1 = 0.107

Divide by the smallest

C = 0.093 / 0.093 = 1

H = 0.107 / 0.093 = 1.15

Multiply through by 7 to express in whole number

C = 1 × 7 = 7

H = 1.15 × 7 = 8

Thus, the empirical formula of the compound is C₇H₈

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Answer:

A: Accurate Records

Explanation:

Hello, these are the answers to your question:-

a measure of the energy of motion of the particles of matter. temperature.

a change in which energy is released. exothermic change.

the energy stored in the chemical bonds between atoms. chemical energy

a change in which energy is absorbed. endothermic change

the total energy of all of the particles in an object. thermal energy

the fact that matter is neither created nor destroyed in any physical or chemical change. law of conservation of mass.

alters the form or appearance of matter but does not turn any substance in the matter into another substance. physical change

a change in matter that produces one or more new substances. chemical change.

Hope it helps you...

Answered by Benjemin ☺️

✅

Answer:

Explanation:

1 = A

Sublimation is the process where by a sample is heated to pass through solid phase to gaseous phase without the intermittent liquid phase. Example of substance that sublime is camphor.

2 = D

Decantantion

5 = F

Filtration is the process a liquid from solid using a porous material. This technique requires a set up and a good porous material eg filter paper.

6 = B

This technique is to separate a mixture of solids by converting them from solid phase to gaseous phase since they sublime.

3 = deposition.

The answer isn't in the option but deposition is the process of substance in gaseous phase to change into solid state without passing through liquid phase. Deposition is the opposite of sublimation.

4 = E

Explanation:

\(workdone = force \times distance \\ W = (2.6 \times {10}^{ - 4} ) \times (3.7 \times {10}^{ - 3} ) \\ W = 9.62 \times {10}^{ - 7} \: joules\)

The formula W = Fd, where W is the amount of work done, F is the force, and d is the distance, is used to determine how much work is done on a particle when it is pushed by a force. The force and distance in this issue are 2.6 10-4 newtons and 3.7 10-3 metres, respectively.

We add the force and distance together to determine the work done: 9.62 10-7 newton-meters are equal to W = 2.6 10-4 newtons x 3.7 10-3 metres. The response must be presented using the appropriate scientific notation and significant numbers.

The solution should include three significant figures, just like the numbers in the problem, which have three. Therefore, 9.62 10-7 newton-meters is the correct answer.

This response uses appropriate scientific language.notation because the exponent is a negative power of 10 and the coefficient ranges from 1 to 10. In conclusion, the particle underwent work from the force of 9.62 10-7 newton-meters. This response uses the appropriate scientific notation and the correct number of significant digits.

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Possible reasons for no observed reaction include lack of reactivity, insufficient reactant concentration, incompatibility of aqueous solutions, kinetic factors, and experimental limitations.

It is important to note that these are possible reasons, and the actual reason can vary based on the specific compounds and conditions involved.

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Answer:

0.18× 10²³ molecules

Explanation:

Given data:

Mass of copper hydroxide = 3.30 g

Number of molecules = ?

Solution:

Number of moles = mass/molar mass

Number of moles = 3.30 g/97.56 g/mol

Number of moles = 0.03 mol

Avogadro number:

The given problem will solve by using Avogadro number.

It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.  The number 6.022 × 10²³ is called Avogadro number.

1 mole = 6.022 × 10²³ molecules

0.03 mol × 6.022 × 10²³ molecules / 1mol

0.18× 10²³ molecules

CaO(s) + SO3(g) → CaSO4(s)

Balanced equation:

CaO(s) + SO3 => CaSO4(s)

It is already balanced.

A balanced reaction obeys the law of conservation of mass. According to the law of conservation of mass, mass can neither be created nor be destroyed. The balanced reaction is CaO(s) + SO₃(g) → CaSO₄(s).

A chemical equation in which number of atoms of reactants and products on both sides of the equation are equal is defined as the balanced chemical equation. The amount of reactants and products on both sides of the equation are equal.

The numbers which are used to balance the chemical equation are called the coefficients. The coefficients are added before the formula or chemical symbols. They are essential to balance a reaction.

Here the equation CaO(s) + SO₃(g) → CaSO₄(s), is already balanced. Since the number of 'Ca', 'O', and 'S' on both sides of the equation are equal. So it is a balanced one.

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Answer:

C. the energy used to hold the nucleus together

To react completely with 50.0g of nitrogen gas (N2), we would need approximately 10.820 grams of hydrogen gas (H2).The correct number of significant figures, is 10.8 g H2.

To determine the amount of hydrogen gas (H2) required to react completely with 50.0g of nitrogen gas (N2), we need to use stoichiometry.

The balanced equation is:

N2 + 3H2 → 2NH3

From the equation, we can see that the molar ratio between nitrogen gas and hydrogen gas is 1:3. This means that for every 1 mole of N2, we need 3 moles of H2 to react completely.To find the moles of nitrogen gas (N2) in 50.0g, we need to divide the mass by the molar mass of nitrogen (28.02 g/mol):

moles of N2 = 50.0g / 28.02 g/mol = 1.784 mol

Since the molar ratio between N2 and H2 is 1:3, we can multiply the moles of N2 by the ratio to find the moles of H2 required:

moles of H2 = 1.784 mol N2 × (3 mol H2 / 1 mol N2) = 5.352 mol H2

Now, we can convert the moles of H2 to grams by multiplying by the molar mass of hydrogen (2.02 g/mol):

grams of H2 = 5.352 mol H2 × 2.02 g/mol = 10.820 g H2

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Answer: B. Metal

Explanation: The catalyst used in the converter is mostly a precious metal such as platinum, palladium and rhodium Hope This Helped (=^･-･^=)