based on the data in the table, which of the following concentrations of sodium chloride is most toxic to brine shrimp? responses 0mg100ml/ 0 mg 100 ml 0 milligram per 100 milliliters 10mg100ml/ 10 mg 100 ml 10 milligrams per 100 milliliters 20mg100ml/ 20 mg 100 ml 20 milligrams per 100 milliliters 30mg100ml/

The statements which is true about the reactants from the given simulation above is: It involves the breaking of chemical bonds.

The correct answer choice is option c

For a chemical reaction to occur, the bond between the reacting substances breaks either by covalent or electrovalent bonding in order to form new substance.

So therefore, reactants usually break chemical bonds duringchemical reaction.

Complete question:

A chemical reaction causes the chemical compositions of substances to change. Reactants are substances that enter into a reaction, and products are substances produced by the reaction

Which of the following are the reactants for this simulation? Select all that apply

a. A chemical reaction results to formation of new bonds

b. A chemical reaction involves the formation of new substance.

c. It involves the breaking of chemical bonds

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Answer:

32 gm O

Explanation:

there are 16 gm of O in each 18 gm of water ....the other two grams are H

so there would be 32 gm of oxygen in 36 gm water

Homogeneous and heterogeneous mixture in colloid, suspension and solution

A colloid is a heterogeneous mixture in which the dispersed particles are intermediate in size between those of a solution and a suspension and within the categories of homogeneous and heterogeneous mixtures there are more specific types of mixtures including solutions is alloys, suspensions, and colloids and a solution is a mixture where one of the substances dissolves in the other and the substance that dissolves is called the solute

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For a thermometer with a mark at every 1.0°C, the uncertainty is ± 0.5°C which can result in errors.

Errors in chemical analysis result when there is a difference between observed value and the true value.If the magnitude of errors is large , it results in decrease in accuracy, reproducibility, and precision.

There are three types of errors:1) random error 2) systematic error 3) human error.The cause of random errors are difficult to quantify while the human errors can be minimized by taking a range of readings to reduce the error.

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Answer:

Because in order to find the average, you need to divide by the number of sites tested. Sometimes that doesn't divide evenly.

Explanation:

Answer:

neutral

Explanation:

There are three basic subatomic particles. These are;

A neutron has no charge unlike the proton and the electron. It is present in the nucleus and contributes to the mass of the atom.

Explanation:

we have,

force(f)=10,000N

mass(m)=500kg

now,

acceleration=f×m

=10,000×500

=5000000m/s²

The temperature along the H-R-x-axis. A's Growing from left to right.

Moreover, the temperature can be seen to drop as one moves further to the right along the x-axis. Moreover, the H-R diagram can be broadly divided into four quadrants. The stars in the top-left quadrant are warm and brilliant, while those in the top-right quadrant are cool and bright.

If you can interpret what each axis in the HR diagram implies, it's really simple to understand. The star's surface temperature is measured along the horizontal axis in Kelvin. The stars on the right are significantly cooler and redder in hue than the stars on the left, and they are 3000 Kelvin in temperature.

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Answer:

2C5H12O+15O2→10CO2+12H2O

Explanation:

To prove the Law of Conservation of Mass, this equation is not balanced. To balance it, you need to show the work to find out how to balance it. To do that, You look at the C’s first and question are they balanced? They aren’t so you add a CO2 and continue that process until it’s balanced for each element.

Answer:

1.223 g/ml

Explanation:

Allotrope 1 has the higher melting point because it lacks the covalent bonds between phosphorus atoms that are present in allotrope 2.

Allotropes of solid phosphorus are different forms of the element which differ in their molecular arrangement and structure. Allotrope 1 is a more stable form and has a higher melting point than that of allotrope 2 due to the absence of covalent bonds between the phosphorus atoms in allotrope 1.

The structure of allotrope 1 is an ordered arrangement in which the phosphorus atoms form a three-dimensional lattice. This lattice structure is held together by strong Van der Waals forces, which are electrostatic attractions between the atoms. This structure is more stable than that of allotrope 2 and has a higher melting point due to the increased strength of the interatomic forces.

In contrast, the structure of allotrope 2 is much less ordered, and the phosphorus atoms are held together by covalent bonds. This structure is not as stable as that of allotrope 1 and has a lower melting point. The covalent bonds between the phosphorus atoms are much weaker than the forces in allotrope 1, and consequently the melting point of allotrope 2 is lower.

This question is incomplete, so I am attaching the image that contains the information needed to answer it.

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Answer: c

Explanation: I took it

Answer:

IT WILL HOVER IN THE MIDDLE

Explanation:

The pH of the mixture is 4.74.

The Henderson-Hasselbalch equation is pH = pKa + log([A-]/[HA]), where pKa is the dissociation constant, [A-] is the concentration of the conjugate base, and [HA] is the concentration of the acid. It is used to calculate the pH of a buffer solution.

A buffer solution is a solution that resists changes in pH when small amounts of acid or base are added. It works by containing a weak acid and its conjugate base, or a weak base and its conjugate acid. When an acid is added to the solution, the weak base in the buffer neutralizes it, and when a base is added, the weak acid in the buffer neutralizes it. This helps to maintain the pH of the solution.

pH = pKa + log([A-]/[HA]), where pKa = -log(Ka)

pKa = -log(1.3 x 10^-5) = 4.89

[A-]/[HA] = [NaC3H5O2]/[HC3H5O2] = 1/1 = 1

pH = 4.89 + log(1) = 4.89

Therefore, the pH of the mixture is 4.89.

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Answer:

A is the answer

Explanation:

Plants require water is not an example of ways pants engage with abiotic factors. Therefore, the correct option is option C.

An ecosystem has two parts: biotic and abiotic. An ecosystem is a group of coexisting living and non-living things. An ecosystem's biotic and abiotic components are what distinguish it from other ecosystems. One either a biotic or abiotic component can have an impact on the entire system.

As a result, abiotic factors control how long organisms can survive inside an ecosystem. The primary distinction between biotic as well as abiotic would be that biotic denotes all living organisms within an ecosystem, and abiotic denotes all inorganic, chemical, and physical elements. Plants require water is not an example of ways pants engage with abiotic factors.

Therefore, the correct option is option C.

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Answer:To calculate the concentration of the Fe(NO3)3 solution after dilution, we can use the formula:

Explanation:

C1V1 = C2V2

C1 = Initial concentration of the solution

V1 = Initial volume of the solution

C2 = Final concentration of the solution

V2 = Final volume of the solution

Initial concentration (C1) = 3.0 M

Initial volume (V1) = 80 mL

Final volume (V2) = 1500 mL

Using the formula, we can solve for C2:

C1V1 = C2V2

(3.0 M)(80 mL) = C2(1500 mL)

Rearranging the equation to solve for C2:

C2 = (C1V1) / V2

C2 = (3.0 M)(80 mL) / 1500 mL

C2 ≈ 0.16 M

Therefore, the concentration of the Fe(NO3)3 solution after dilution is approximately 0.16 M.

we have an initial solution of Fe(NO3)3 with a concentration of 3.0 M and a volume of 80 mL. The goal is to dilute this solution to a final volume of 1500 mL and determine the concentration of the diluted solution.

To do this, we can use the dilution formula: C1V1 = C2V2, where C1 and V1 represent the initial concentration and volume, and C2 and V2 represent the final concentration and volume.

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Dehydration synthesis is a type of chemical reaction in which two molecules are joined together by the removal of a water molecule. This type of reaction is often used to build polymers from monomers.

In dehydration synthesis, a hydrogen atom from one monomer is joined to an oxygen atom from another monomer, with the release of a water molecule. This reaction is also known as condensation reaction.

Dehydration synthesis is a reversible reaction, meaning that the polymer can be broken down into its monomers by adding water. This is important for the body to be able to break down and recycle macromolecules.

2. Name the specific covalent bond formed between monomers (subunits) of:

Amino acids: The specific covalent bond formed between amino acids is called a peptide bond. The peptide bond is formed by the condensation of two amino acids, with the release of a water molecule.

Monosaccharides: The specific covalent bond formed between monosaccharides is called a glycosidic bond. The glycosidic bond is formed by the condensation of two monosaccharides, with the release of a water molecule.

Nucleotides: The specific covalent bond formed between nucleotides is called a phosphodiester bond. The phosphodiester bond is formed by the condensation of three nucleotides, with the release of two water molecules.

The peptide bond is the main type of bond that holds amino acids together in proteins. The glycosidic bond is the main type of bond that holds monosaccharides together in carbohydrates. The phosphodiester bond is the main type of bond that holds nucleotides together in nucleic acids.

These bonds are all covalent bonds, which means that they are formed by the sharing of electrons between atoms. The strength of these bonds varies, but they are all strong enough to hold the monomers together in the polymers.

The specific type of covalent bond that is formed between monomers depends on the type of polymer. For example, the peptide bond is only formed between amino acids, while the glycosidic bond is only formed between monosaccharides.

The formation of these covalent bonds is an important part of the synthesis of macromolecules. These bonds are what give macromolecules their structure and their properties.

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Answer

b. It produces carbon dioxide when burned in pure oxygen.

Explanation

The reaction between diamond and oxygen, producing carbon dioxide is not a physical property of diamond, it is a chemical property because breaking and synthesis of chemical bonds occur.

I HOPE IT WILL HELP YOU.

Thank you.

^ - ^

A decomposition reaction is a reaction in which the compound is broken up into its constituents.

A decomposition reaction is a reaction in which the compound is broken up into its constituents. When the decomposition is brought about by a catalyst, it is called catalytic decomposition.

Let us look at the catalytic decomposition of the compound potassium trioxochlorate V. in the presence of the catalysts manganese dioxide. The reaction occurs as follows;

2KClO3 -----> 2KCl + 3O2

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The standard enthalpy change of the explosive reaction is -11408 kJ/mol.

The standard enthalpy change of the reaction can be calculated using the enthalpy of formation values of the reactants and products.

The enthalpy of the formation of ammonium nitrate (NH4NO3) is -393.5 kJ/mol, the enthalpy of the formation of the fuel oil (C10H22) is -249.7 kJ/mol, the enthalpy of the formation of oxygen (O2) is 0 kJ/mol.

The enthalpy of the formation of nitrogen (N2) is 0 kJ/mol, the enthalpy of the formation of water (H2O) is -285.8 kJ/mol, and the enthalpy of the formation of carbon dioxide (CO2) is -393.5 kJ/mol.

The equation for the explosive reaction is 3NH4NO3(s)+C10H22(l)+14O2(g)>3N2(g)+17H2O(g)+10CO2(g). Therefore, the standard enthalpy change of the reaction can be calculated using the following equation:

ΔH = [3(-393.5) + (-249.7) + (14*0) + (3*0) + (17*-285.8) + (10*-393.5)] - [3(-393.5) + (-249.7) + (14*0)]

ΔH = -11408 kJ/mol.

Therefore, the standard enthalpy change of the explosive reaction is -11408 kJ/mol.

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The complete question is attached below.

The issues with the way the procedure was performed include not performing the reaction on ice, adding the acids all at once, not performing the reaction at reflux, and using sulfuric acid when only nitric acid should be used. These issues can affect the outcome of the reaction and may lead to undesired results.

Based on the given options, there are multiple issues with the way the procedure was performed:

1. The reaction was not done on ice: Performing the reaction on ice is important in some cases to control the reaction rate and prevent unwanted side reactions. Not doing so can lead to unexpected results or low yields.

2. The acids were added all at once: Adding the acids all at once can cause a rapid and uncontrolled reaction. It is often preferable to add them slowly or in a specific order to ensure proper mixing and control of the reaction conditions.

3. The reaction was not performed at reflux: Refluxing is a technique used to maintain a constant temperature during a reaction. It involves heating the reaction mixture and condensing and returning any evaporated solvents or reagents back into the reaction vessel. Not performing the reaction at reflux can lead to variations in temperature and affect the reaction outcome.

4. Only nitric acid should be used, no sulfuric acid: The procedure specifies that only nitric acid should be used, while sulfuric acid should not be used. This could be because sulfuric acid can have adverse effects on the reaction or result in unwanted side reactions.

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Proton:

Positive

Found in Nucleus

Mass of 1 AMU

Neutron:

Neutral

Found in Nucleus

Mass of 1 AMU

Electron:

Negative

Found in orbitals

Mass of 0 AMU

According to the law of conservation of mass, the mass of the reactants and products before the reaction must be equal. He is mistaken since the process of rusting the nail is occurring, and the mass of the finished product is growing.

what is the law of conservation of mass?

According to the law of conservation of mass of reactants before the reaction must be equal to the mass of the product.

What is rusting?

Rusting is a form of oxidation. Rust is formed when iron combines with water and oxygen to generate hydrated iron oxide. Which is given by.

Iron is present in nails, which when coupled with oxygen produces ferrous oxide, which is heavier than iron. The mass of the reactants is therefore greater than the mass of the result.]

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An electron orbiting around the nucleus of an atom is in constant motion, much like a planet in orbit around a star. When the electron emits a photon and drops down to a lower energy state, it is said to "decay" or "fall back" to the ground state.

In this question, we need to find the number of revolutions the electron completes in the given time of 10 seconds. The number of revolutions the electron completes in the given time of 10 seconds is 7.63 x 10^15 revolutions. The formula for finding the number of revolutions is the ratio of time to the period of the orbit. We can calculate the period of the orbit by using the formula T = 2π√(mr³/F) where T is the period, m is the mass of the electron, r is the radius of the orbit, and F is the force of attraction between the electron and the nucleus. To find the radius of the orbit, we use the formula r³ = F/4π²mr²T², where T is the decay time of the electron, which is 10 seconds. We can then use the period of the orbit to calculate the number of revolutions using the formula above. We can do this using the formula:

\text{Number of revolutions} = \frac{\text{Time}}{\text{Period}}

where the period is the time taken for one complete revolution. Since we don't know the period, we need to find it using the information given in the question. We can do this using the formula for the time period of a circular orbit:

T = \frac{2\pi r}{v}

where T is the period, r is the radius of the orbit, and v is the velocity of the electron. The velocity of the electron can be found using the formula for the centripetal force:

F = \frac{mv^2}{r}

where F is the force of attraction between the electron and the nucleus, m is the mass of the electron, and r is the radius of the orbit. Rearranging this equation, we get:

v = \sqrt{\frac{F r}{m}}

Substituting this expression for v into the equation for T, we get:

T = \frac{2\pi r}{\sqrt{\frac{F r}{m}}} = 2\pi \sqrt{\frac{m r^3}{F}}

Substituting the given value of the decay time of the electron, which is 10 seconds, we get:

10 = 2\pi \sqrt{\frac{m r^3}{F}}

Squaring both sides and rearranging, we get:

r^3 = \frac{F}{4\pi^2 m} (10)^2

Dividing both sides by r, we get:

r^2 = \frac{F}{4\pi^2 m} (10)^2

Taking the square root of both sides, we get:

r = \sqrt{\frac{F}{4\pi^2 m} (10)^2} = 2.19 \times 10^{-10} \text{ m}

Now we can find the period of the orbit using the formula we derived earlier:

T = 2\pi \sqrt{\frac{m r^3}{F}} = 1.31 \times 10^{-15} \text{ s}

\Finally, we can use the formula for the number of revolutions to find the answer:

\text{Number of revolutions} = \frac{\text{Time}}{\text{Period}} = \frac{10}{1.31 \times 10^{-15}} = 7.63 \times 10^{15} \text{ rev}

In conclusion, the number of revolutions an electron completes in the given time of 10 seconds is 7.63 x 10^15 revolutions.

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Answer:

Explanation:

volume of spherical ball = 4/3 x π R³

= 4 x 3.14 x .5³ / 3

= .5233 cm³ or ml.

mass = 2 g

density = mass / volume

= 2 / .5233

= 3.8 g / ml .

So its density is more than that of water , hence it will sink into water .

Answer:

1,2,3,5,7,8,9

Explanation:

are all physical properties