Identify the false statement.
A. a scientific law fully explains a natural phenomenon.
B. the scientific process is repeated until a hypothesis either fits all the observed experimental facts or is discarded.
C. for the results of an experiment to be accepted, the experiment must produce the same results no matter how many times it is repeated.
D. the scientific method is a logical, systemic approach to the solution of a problem.

The molar concentration of a 12% sodium chloride solution is approximately 2.05 M.

To determine the molar concentration of a 12% sodium chloride solution, we need to convert the given percentage concentration into molarity.

First, we need to understand that the percentage concentration refers to the mass of the solute (sodium chloride) relative to the total mass of the solution.

In this case, a 12% sodium chloride solution means that there are 12 grams of sodium chloride in 100 grams of the solution.

To convert this into molar concentration, we need to consider the molar mass of sodium chloride, which is 58.5 g/mol.

We can start by calculating the number of moles of sodium chloride in 12 grams:

Moles of sodium chloride = mass of sodium chloride / molar mass of sodium chloride

Moles of sodium chloride = 12 g / 58.5 g/mol = 0.205 moles

Next, we calculate the volume of the solution in liters using the density of the solution. Since the density is not provided, we assume a density of 1 g/mL for simplicity:

Volume of solution = mass of solution / density

Volume of solution = 100 g / 1 g/mL = 100 mL = 0.1 L

Finally, we calculate the molar concentration (Molarity) by dividing the number of moles by the volume in liters:

Molar concentration = moles of solute / volume of solution

Molar concentration = 0.205 moles / 0.1 L = 2.05 M

Therefore, the molar concentration of a 12% sodium chloride solution is approximately 2.05 M.


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Answer:

The formula for the anhydrous compound that was part of the mixture called natron that was used by the Egyptians is Na2(CO3)10(H2O).

They use this compound for medicine, cookery, agriculture, in glass-making and to dehydrate egyptian mummies.

Compound of sodium carbonate and sodium bicarbonate was the name of the resulting hydrate that formed.

In the given reaction  fluorine is reduced and chlorine is oxidized.

Oxidation is a process in which addition of oxygen or removal of hydrogen and electron takes place, while reduction is a process in which addition of hydrogen & electrons or removal of oxygen takes place.

Given chemical reaction is:

F₂ + 2HCl → Cl₂ + 2HF

F₂ + 2e⁻ → 2F⁻

2Cl⁻ → Cl₂ + 2e⁻

Hence, fluorine is reduced and chlorine is oxidized in the given reaction.

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Explanation:

H−S has least polarity in the bond because the electronegativity difference between H and S is the least.

There can be two, solid (Hail) and liquid (Water).

Answer:

liquid and solid

liquid- rain

solid- hail and snow

I don't know about gas; probably not.

Answer:

Experimental: the dogs who get the toys

Control: the dogs who dont recieve a toy

Explanation:

expermental is the group that recieved the tested variable in this case that being the toy

control is the group that doesn't recieve the tested variable

Therefore, the concentration of \(Zn^2+\)(aq) ion at the cathode is 0.050 M.

When a current is applied to an aqueous solution of sodium sulfide, hydrogen gas (\(H_2\)) will be produced at the cathode, while sodium metal (Na) and sulfur (S) will be produced at the anode. The half-reactions occurring are:

Cathode: 2H+(aq) + 2e- → (\(H_2\)(g)

Anode: 2OH-(aq) → \(1/2O_2(g) + H_2O(l)\) + 2e- ; \(2S_2-(aq) + 2H_2O\)(l) → \(SO_4^2-\)(aq) + 4H+(aq) + 2e- ; 4OH-(aq) → O2(g) +\(2H_2O\)(l) + 4e-

The voltage generated by the zinc concentration cell described by Zn(s)|\(Zn^2+(aq,0.100 M)|| Zn^2+\)(aq,? M)|Zn(s) is 13.0 mV at 25°C. Using the Nernst equation, we can calculate the concentration of \(Zn^2+\)(aq) ion at the cathode:

Ecell = E°cell - (RT/nF)lnQ

where E°cell = 0.00 V, R = 8.314 J/(mol*K), T = 298 K, n = 2, F = 96485 C/mol, Q =\([Zn^2+(aq,0.100 M)]/[Zn^2+(aq, M)]\)

Solving for \([Zn^2+(aq,? M)], we get [Zn^2+(aq, M)]\) = 0.050 M.

So. Therefore, the concentration of \(Zn^2+\)(aq) ion at the cathode is 0.050 M.

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Answer:

NA = 6.02214076×10^23 mol−1.

Explanation:

1 mole of helium gas contains 6.02 x10^23 helium atoms. So multiply this by 3 after solving the equation.

There are 1.8066 x 10 ^24 atoms in 3 moles of helium

1 mole of any substance is equal to 6.022 × 1023 atoms , This is called the  Avogadro's Number and it represents 12 grams of pure carbon.

Hence,

I mole of Helium = 6.022 × 1023 atoms

Therefore,  

3 moles of helium will be 3 x   6.022 × 1023 atoms

3 moles of helium =1.8066 x 10 ^24 atoms

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The joint in the human body which is similar to the chicken wing joint is elbow joint. There is some similarities in the arm joint movement of chicken and humans.

Joints are the connecting parts for bones. Thus two bones are connected by joints. The skeletal system is a web of different living tissues that gives the human body its structure and protects organs.

Additionally, it is where blood cells are created. Due to their similar evolutionary history as vertebrates, chicken wings are homologous to the upper limb of humans; that is, they share many of the same features.

In order to connect the shape of muscles, bones, and joints to their function, we can analyze a chicken wing. The structure, tissues and some movements of elbow joint of humans is similar to that of chicken wing joint.

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Answer:

20 km/h

Explanation:

Speed = distance ÷ time

Speed = 10 ÷ 0.5 hours

Speed = 20 km/hr

Answer:8

842.46 or to the next whole number

Explanation:

just multiply the mass of iron with the volume mL you have.

The mass of the iron whose volume and density are 111 ml and 7.847 g/cm³ respectively is 871.01 grams.

The product of density and volume of a substance represents its mass. Mathematically -

M = V x ρ

where -

ρ - density

M - mass

V - volume

Given is iron in liquid form. It occupies a total volume of 111 ml.

The mass of liquid iron can be calculated using -

M = V x ρ

Volume of iron [V] = 111 ml = 111 cm³.

Density of iron [ρ] = 7.847 g/cm³

Therefore, we can write -

M = 7.847 x 111

M = 871.01 grams

Therefore, the mass of the iron whose volume and density are 111 ml and 7.847 g/cm³ respectively is 871.01 grams.

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Answer:

pure

Explanation:

Distilled water is a form of pure water, hence it is not bad or harmful to drink distilled water.

Answer:

I think it's pure. hope this helps◉‿◉

Answer: all of them

Explanation:

Answer:

The answers X i just took the test

Explanation:

You can fill in the table for other elements and their respective isotopes by determining the appropriate number of protons, neutrons, and electrons based on the given isotope mass number and atomic number.

To accurately fill in the table with the correct number of subatomic particles for the elements given the isotope mass number, we need to consider the composition of atoms and their respective subatomic particles. Atoms are composed of protons, neutrons, and electrons.

The number of protons in an atom is equivalent to its atomic number, which uniquely identifies the element. The number of neutrons can be determined by subtracting the atomic number from the isotope mass number. Electrons in a neutral atom are equal to the number of protons.

Let's take an example using the isotope mass number:

Isotope: Carbon-14 (mass number = 14)

Element: Carbon (atomic number = 6)Based on the atomic number and isotope mass number, we can determine the number of subatomic particles as follows:

Protons: 6 (same as the atomic number)

Neutrons: 14 - 6 = 8

Electrons: 6 (same as the number of protons in a neutral atom)

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Answer:

Biochemistry is the discipline that studies the chemistry of life, and its objective is to explain form and function based on chemical principles. Organic chemistry is the discipline devoted to the study of carbon-based chemistry, which is the foundation for the study of biomolecules and the discipline of biochemistry. Both biochemistry and organic chemistry are based on the concepts of general chemistry, some of which are presented in Fundamentals of Physics and Chemistry Important to Microbiology.

Explanation:

When a component is removed from a reaction system at equilibrium, the equilibrium system will shift to replace some of what was removed.

It states that when a reaction is in equilibrium and one of the factors that affect the rate of reactions is applied, the equilibrium will shift to neutralize the effects of the constraint.

Every equilibrium system obeys Catelier's principle.

Thus, removing one of the components in a reaction that is in equilibrium will make the equilibrium shift to create more of the component being removed.

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Answer:

D : The equilibrium system will shift to replace some of what was removed.

Explanation:

Based on the information provided, it is likely that the unknown substance is an acid.

Cabbage juice is a natural pH indicator that changes color in the presence of acids and bases. It typically turns purple or pink in the presence of an acid, and green or blue in the presence of a base.

The fact that the solution turns purple suggests that the unknown substance mixed with cabbage juice is acidic in nature. Acids are substances that release hydrogen ions (H+) in solution, which can lower the pH and turn the cabbage juice solution purple.

Additionally, the fact that the substance does not react with calcium carbonate suggests that it is not a base. Bases typically react with acids to produce salt and water, and one common indicator of a chemical reaction between an acid and a base is the production of gas, such as carbon dioxide (CO2), when calcium carbonate reacts with an acid.

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Let's see that the first compound represents an oxide which is a combination resulting from the union of a metallic or nonmetallic element with oxygen. To name an oxide, you have to write "___ oxide", where the line is the name of the element. In this case, lithium is the element that is bonded with oxygen, so its name is lithium oxide.

The second compound that you can recognize as water, is an oxide too. So its name is also hydrogen oxide.

Answer:

Chemical reactions occur when atoms are separated from each other, joined, or rearranged in a different combination. Atoms of one element, however are never changed into atoms of another element as a result of a chemical reaction.

Explanation:

Chromosomes are formed inside the nucleus of a cell. They carry genetic information and are responsible for traits and characteristics passed down from one generation to the next. Chromosomes play a crucial role in cell division, and chromosomal abnormalities can lead to a variety of genetic disorders.

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Answer:

i believe its precipitation??

Explanation:

Answer:

it goes to a solid to a liquid

Explanation:

When something is a solid the molecules are impact together and have a small sense of vibration. But as the solid melts away for example ice, the molecules become more loose forming into a liquid

Answer:

demos los

Explanation:

The Hill coefficient, in this case, would be less than 1, indicating negative cooperativity.

The situation that would produce a Hill plot with a Hill coefficient of less than 1 is: A purified protein has multiple binding sites, and ligand binding to one site decreases the affinity of other sites for the ligand.

The Hill coefficient, denoted as n, represents the cooperativity of binding in a Hill plot. A Hill coefficient greater than 1 indicates positive cooperativity, where ligand binding to one site enhances the affinity of other sites.

On the other hand, a Hill coefficient of less than 1 indicates negative cooperativity, where ligand binding to one site decreases the affinity of other sites.

In the scenario where ligand binding to one site decreases the affinity of other sites, it implies negative cooperativity. This means that as more ligands bind to the protein, the affinity of the remaining sites for the ligand decreases.

Consequently, the Hill coefficient, in this case, would be less than 1, indicating negative cooperativity.

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Your question is incomplete, but most probably your full question was,

Which of these situations would produce a Hill plot with a Hill coefficient less than 1? A purified protein has multiple binding sites, and ligand binding to one site decreases the affinity of other sites for the ligand. A purified protein is a single polypeptide with one ligand-binding site, but the sample is contaminated with some partially denatured protein molecules. A purified protein has multiple binding sites, and ligands bind to each site independently without affecting the binding affinity of other sites. A purified protein is a single polypeptide with two ligand-binding sites, each having a different affinity for the ligand. Incorrect

Process is called Magnetism.

Explanation:

Iron is magnetic, the iron in the mixture will be attracted to the magnet ,leaving the remaining sand in the bowl.

Answer: The bus traveling 200km in 6 hours is traveling the fastest.

Explanation:

Bus 1

150km/5hrs

Simplify -> 30km/hr

Bus 2

200km/6hrs

Simplify -> About 33.333km/hr

Amy Pond's gross pay is $332.50, deductions amount to $39.63, and her net pay is $292.87.

To compute Amy Pond's gross pay, deductions, and net pay, we'll follow these steps:

1. Calculate Gross Pay:

Amy worked 5 days for a total of 38 hours, and her regular rate of pay is $8.75 per hour.

Gross Pay = Number of hours worked * Hourly rate

Gross Pay = 38 hours * $8.75/hour

Gross Pay = $332.50

2. Calculate Deductions:

a) Insurance Deduction:

Amy has $23 withheld for insurance every week.

Insurance Deduction = $23

b) Retirement Account Deduction:

Amy puts 5% of her gross pay into a retirement account.

Retirement Account Deduction = 5% of Gross Pay

Retirement Account Deduction = 5/100 * $332.50

Retirement Account Deduction = $16.63

Calculate Net Pay:

Net Pay = Gross Pay - Deductions

Net Pay = $332.50 - ($23 + $16.63)

Net Pay = $332.50 - $39.63

Net Pay = $292.87

Therefore, Amy Pond's gross pay is $332.50, deductions amount to $39.63, and her net pay is $292.87.

It's important to note that the specific details of deductions can vary based on individual circumstances, such as tax rates, insurance coverage, retirement account options, and other factors. The calculation provided above is a simplified example and may not reflect the exact deductions applicable to a particular situation.

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Answer:

A. (i think)

Explanation:

In 2CaCO3 there are 3 elements

I hope that helped you! If you have any further questions comment down below or message me! Good luck!

It is concluded that the identity of the acid must be a weak acid, but it could be either monoprotic, diprotic, or polyprotic.

Reaction :

It is the titration of a weak acid and a strong base.

It is a neutralisation reaction of monobasic acid and monoacidic base (sodium hydroxide).

The determination of a weak acid in a titration is based on its molar mass and pKa (from points on a titration curve), and its approximate melting point.

The relationship between normality and molarity is :

Normality = base acidity x acid molarity.

We can use M1V1 = M2V2.

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