NEED HELP AS SOON AS POSSIBLE please

Zinc fluoride is the term given to the mixture of the ions zinc (zn+2) and fluoride (f1).

Reactivity, by a reaction with the carbon dioxide in the air. Zinc emits zinc oxide fumes as it burns in the air, which produces a vivid bluish-green flame. With acids, alkalis, and other non-metals, zinc interacts easily.

Under normal circumstances, zinc and air quickly react, gradually generating a dull, grey zinc oxide covering. Zinc also combines to halogens, oxygen, chalcogens, alkalis, acids, ammonia and ammonium salts, as well as less reactive metals. Zinc is an amphoteric metal because it may react with the both acids and alkalis.

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The mass of the zinc in the dollar coin is about 0.486 grams, the mass of the manganese is about 0.285 grams, the mass of the nickel is about 0.162 grams, and the mass of the copper is about 7.135 grams.

What is an alloy?

An alloy is the mixture of two or more elements, at least one of which is a metal. Alloys are typically created to improve upon the properties of the individual metals, such as increasing strength or corrosion resistance. They are used in a wide range of applications, including in the construction of buildings, vehicles, and electronic devices. The specific properties of an alloy depend on the metals that it is made of and the proportion of each metal in the mixture.

According to the problem:

The mass of each metal in the dollar coin has some specific percentage.

Multiply the percentage composition of the metal by the total mass of the coin to determine the mass percentage for each metal:

Zinc: [tex]6.0\% \times 8.1 grams = \frac{6.0}{100} \times 8.1=0.486 grams[/tex]

Manganese: [tex]3.5\% \times 8.1 grams = \frac{3.5}{100} \times 8.1=0.285 grams[/tex]

Nickel: [tex]2.0\% \times 8.1 grams = \frac{2.0}{100} \times 8.1=0.162 grams[/tex]

Copper:

[tex](100\% - 6.0\% - 3.5\% - 2.0\%) \times 8.1 grams = 88.5\% \times 8.1 grams = \frac{88.5}{100} \times 8.1=0.486 grams[/tex]

So the mass of the zinc in the dollar coin is about 0.486 grams, the mass of the manganese is about 0.285 grams, the mass of the nickel is about 0.162 grams, and the mass of the copper is about 7.135 grams.

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Answer: Radiation (obtained by nuclear reactions) is used in medicine, academics, industry, and  electricity.  In addition to that, radiation has been useful in areas such as agriculture, archaeology, space exploration, law enforcement, geology, and many others.

The radiation emitted from nuclear reactions are used in various fields such as medical field, agriculture, research fields etc.

Unstable radioactive elements undergo emission of charged particles such as alpha or beta and produce  their isotopes or new elements. This reactions involving the change to atomic nuclei by reducing the number of protons or neutrons is called nuclear reactions.

The radiation emitted from nuclear reaction is very useful in many fields, especially in medical fields. Many diagnostic techniques are based on radiation.  Similarly radiation is used in cancer treatments.

Suitable radiations are used in agricultural field for pest control. There is a branch itself  in science to study the various utilities of radiations and there are tremendous experiments and researches are conducted based on suitable radiations.

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6l volume of methane gas, ch4, has the same number of atoms as 6.00 l of krypton gas at the same temperature and pressure.

The Avogadro's law can be used to connect the volume of the gas to its number of moles. This law asserts that at the same temperature and pressure, gases with the same molar amount will occupy the same volume. The number of atoms in the two gases must be equal if the number of moles is the same. Accordingly, if Kr and methane both have the same number of particles, their respective volumes would be the same.

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If the solvent level covers the sample, the sample spot will be washed off into the solvent before it travels up the TLC plate

The intermolecular interactions between the solvent and the solute are the main determinant of the solubility of the solute in a given solvent. The solute will dissolve in the solvent if the solvent surrounds and solvates the solute. In contrast to interactions between the solute and other solutes or between the solvent and other solvents, the solute must therefore create greater interactions with the solvent in order to dissolve. It is questionable if a homogeneous solution will develop in a mixture if the solvent-solute interactions are weaker than the solvent-solvent interactions and the solute-solute interactions.

why should care be taken tha tht easample is above the solvent level before the tlc plat eis placed into the devleioping hcambe

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According to the concept of diffusion the water will move from 5% salt solution to 15%salt solution.

Diffusion is defined as the process of movement of molecules which takes place under concentration gradient. It helps in movement of substances in and out from the cell.The molecules move from lower concentration region to a higher concentration region till the concentration becomes equal.

There are 2 main types of diffusion:

1) simple diffusion-process in which substances move through a semi-permeable membrane without the aid of transport proteins.

2) facilitated diffusion- It is a passive movement of molecules across cell membrane from higher concentration region to lower concentration.

There are 2 types of facilitated diffusion one is osmosis and dialysis.

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Answer:

A: Because her drawing does not accurately represent what really happens, she should make a new version of it that better predicts what she actually experienced in the dark room.

Since dextrose cannot be autoclaved and IV administration makes sterility essential, even if the solution may be chemically stable for months, the shorter BUD that will be utilized is 14 days according on USP sterility requirements.

A basic sugar, glucose has the chemical formula C6H12O6. The most prevalent monosaccharide, a type of carbohydrate, is glucose.

(Dextrose dextrorotary glucose), a monosaccharide made from corn, is frequently referred to as "corn sugar" in commerce. It is additionally called glucose. A very refined white sugar, corn sugar has no corn (maize) flavor. Hexose-type sugar glucose contains a group of six carbon atoms.

A simple sugar derived from corn or wheat with the term dextrose is chemically equivalent to glucose, or blood sugar. Dextrose is a typical sweetener used in baked products and is present in things like processed foods and corn syrup.

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Speed is calculated as follows: speed = distance x time. Knowing the units for distance and time is necessary to determine the units for speed. Then distance = speed/time.

The distance traveled must be divided by the amount of time spent traveling in order to calculate speed. Divide the distance by the speed to calculate the time. Add the speed and the time together to get the distance. These equations can be seen as s=d/t when speed, distance, and time are all given.

The distance formula, d = st, or distance equals speed times time, can be used to calculate distance. Speed and rate are comparable because they both denote a certain amount of travel per unit of time, such as miles per hour or kilometers per hour. If speed s is equal to rate r, then r = s = d/t.

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Answer: i think is D

Explanation:

The neutral magnesium atom has 12 protons, 12 neutrons, and 12 electrons.Ten electrons, twelve protons, and twelve neutrons make up the magnesium ion.

Protons, neutrons, and electrons make up an element's atom. Protons and electrons are distributed equally among neutral atoms. Gain or loss of electrons causes the formation of ions.

For the atom of magnesium: The neutral magnesium atom has 12 protons, 12 neutrons, and 12 electrons.

Regarding the magnesium ion:

It possesses two less electrons than the magnesium ion. As a result, there are 10 electrons, 12 protons, and 12 neutrons in each magnesium ion.

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Answer:B:12 12 10

Explanation:edge

The two changes that can be classified as physical are as follows:

A physical change in chemistry is a change affecting the form of a chemical substance, but not its chemical composition.

When matter changes its observable properties, we can say it has undergone a physical change.

Physical change is a type of change where the physical properties of matter change. Physical changes include;

Therefore, melting of ice, which is a change of state and shattering of glass are examples of physical change.

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Answer:

what are the gas samples

Empirical formula of a compound can be determined using their number moles in the given weights. Thus number of moles of both gallium and phosphorous are 0.013 . Thus, empirical formula of this composition is GaP.

Empirical formula of a compound is derived from the number of moles of each element present in the compound. It will be different from the molecular formula of the compound.

Atomic mass of phosphorous = 31 g/mol

Atomic mass of gallium = 69.72 g/mol

Number of moles of 0.412 g of P = 0.412 g/31 g = 0.013.

No.of moles in 0.928 g of Ga = 0.928 / 69.72 = 0.013.

The ratio of their number of moles = 0.013 :0.013 = 1 :1.

Therefore, the empirical formula of the compound containing 0.928 g of gallium and 0.412 g of phosphorus is GaP.

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A sample of titanium-45 will degrade from 65 grams to 25 grams in 4.24 hours.

The formula for the half-life of a first-order reaction is = 0.693/k.

Half-life is 3.08 hours, given.

So k = 0.225

First order reaction rate is calculated using:

where k is the reaction rate and 0.225 is the reaction time

R' = 25g, the total quantity.

original quantity = 65g

With these parameters entered, we obtain t=4.24 hours.

As a result, a sample of titanium-45 will degrade from 65.0 grams to 25.0 grams in 4.24 hours.

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The molarity of the acid is : 0.82 Molar

Calculate the molarity of acid?

Volume of acid = 25 ml

Molarity of base = 0.5 M

Volume of base = 41.00 ml

Since, acid and base reacts in 1:1 stoichiometric ratio, we can use the molar equivalence formula as:

M(acid) × V(acid) = M(Base) × V(Base)

M(acid) = 0.82 M

What is Molarity?

Molarity (M) is the amount of a substance in a given volume of solution. Molarity is defined as the number of moles of solute per liter of solution. Molarity is also called the molarity of a solution.

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Answer:

a

Explanation:

Answer:

1558.27 ml or 1.56 L

Explanation:

The molecular mass of octane is 114.23 g/mol so 1.00 g of octane equals to:

(1.00 g( x (1 mol/114.23g) = 0.00875 mol

From the chemical equation:

2C8H18 + 25O2 --> 16CO2 + 18H2O

you know that 2 mol of octane will produce 16 mol of CO2

so 0.00875 mol of octane will produce:

0.00875 x (16/2) = 0.07 moleof CO2

The molecular mass of CO2 is 44.01 g/mol so 0.07 mol will equal to

44.01 x 0.07 = 3.0807 g of CO2

Under “standard” conditions of 0 degrees Celsius and 1 atmosphere of pressure, carbon dioxide exhibits a density of 0.001977 g/mL

since d = m/V => V = m/d = 3.0807/0.001977 = 1558.27 ml or 1.56 L

NOTE: if you have a specific temperature or pressure, you can use the formula for ideal gas PV=nRT to solve for volume.

I hope this helps you to understand the question

The types of chemical reactions described by the given chemical equations are as follows:

Cu (s) + 2 AgNO₃ (aq) ---> 2 Ag (s) + Cu(NO₃)₂ (aq) : Single replacement reaction

C₃H₈ + 5 O₂ ------> 3 CO₂ + 4 H₂O : Combustion reaction

3 N₂H₄ ---> 4 NH₃ + N₂ : decomposition reaction

4 Fe + 3 O₂ --> 2 Fe₂O₃ : Combination reaction

Mg(OH)₂ + 2 HCI --> MgCl₂ + 2 H₂O : neutralization reaction

Chemical reactions are reactions in which chemical changes occur in the substances resulting in the formation of new products.

There are several types of chemical reactions and they include the following:

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The component in the solar cell system which provides electrons to replace the electrons released by the dye simply is the graphite layer.

The graphite layer is one of the major parts oth the solar cell. It help in the provision of electrons by acting as a counter electrode within the electrolyte. In order, this layer is part responsible for replacing electrons produced by dyes.

In conclusion, we can now confirm from all said and done from above that the solar cell too has a way of producing electrons.

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Answer:C

Explanation:I got it correct not no genius though.

At the end of the diffusion process, the concentration of substances on each side is. equal. This is because the diffusion process causes the substances to move from areas of high concentration to areas of low concentration until they are evenly distributed.

What is concentration?
Concentration in chemistry is calculated by dividing a constituent's abundance by the mixture's total volume. Mass concentration, molarity, number concentration, as well as volume concentration are four different categories of mathematical description. Any type of chemical mixture can be referred to by the term "concentration," but solutes as well as solvents in solutions are most frequently mentioned. There are different types of molar (amount) concentration, including normal concentration as well as osmotic concentration. The word "concentration" is derived from the French verb "concentrer," which means "to put at the centre" and comes from the root con-.

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Iodine atoms gain electrons in this process, resulting in negatively charged iodide ions, while potassium atoms lose electrons, resulting in positively charged potassium ions. There is oxidation and reduction.

The oxidation status of the substrate can change during redox reactions. Similar to how losing electrons or increasing the oxidation state is oxidation while gaining electrons is reduction.

When oxygen comes into contact with a material or an element, an oxidation reaction occurs. Another way to look about oxidation is as the procedure through which the species of reactants lose their hydrogen. Oxidation is the loss of electrons in a molecule, an atom, or an ion.

Oxidation reactions produce new functional groups in molecules or change existing functional groups in molecules.

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Vessel B has more mass. Explanation: Because temperature and average kinetic energy of molecules are directly proportional to each other.

The average kinetic energy of a substance's particles is directly inversely correlated with its temperature. As the temperature increases, the particles must travel more quickly because their mass remains constant.

The relationship between a gas particle's average kinetic energy and temperature is linear. The pace at which the gas molecules flow rises with temperature. At a specific temperature, the average kinetic energy of all gases is identical.

Molecules of gas move more quickly when they are lighter. Because of this, as the gas's temperature rises, its volume also does so. The more gas particles there are, the more likely it is that they will hit the container's walls, hence the frequency of collisions must rise.

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Therefore, the final temperature of the mixture is 43.15 C.

What is Temperature?

The term "temperature" refers to a measurement of an object's average kinetic energy, which is a category of energy linked to motion and used to describe how hot or cold an object is. But how hot and how frigid are they exactly? Hot and cool are not really scientific concepts.A physical scientist would check the metal's liquid state's temperature to find the answer. It is less confusing to use temperature instead of phrases like hot or cold.

Let the mixture's final temperature be toC (clearly, 95.00 oC > t oC > 25.00 oC).

Cold water sample's mass is equal to (volume times density) or (400 mL times 1.00 g/mL) = 400 g.

Water has a specific heat capacity of 4.184 J/g.

Heat gained by cold water equals mass times the water's specific heat capacity times the temperature change.

= (400g) x (t - 25) C x (4.184 J/g)

Hot water sample mass equals 140 g (140 mL x 1.00 g/mL).

Heat lost by hot water is calculated as (140 g) x (4.184 J/g. C) x (95 - t) C.

400 ( t - 25 ) = 140 ( 95 - t)

400 t - 10000 = 13300 - 140t

540t = 23300

t = 43.15

Therefore, the final temperature of the mixture is 43.15 C.

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Squirrel: Digestive, Circulatory, Muscular, and Nervous systems.

Soccer: Skeletal/muscular, circulatory, respiratory, and body systems.

For Squirrel:

The digestive system functions to break food down into smaller pieces that are more suitable for swallowing and absorbing the available nutrients. It transports to various cells of living organisms.

musculature allows animals to keep their balance on branches and avoid falling.

The nervous system controls all living things. The nervous system controls all physical activity. Among many other functions, it is involved in maintaining balance and maintaining alertness during meals.

Soccer player:

This person is trying to hit the ball to score a goal. He seems to be adjusting his arms and legs to allow this.

The muscular and skeletal systems work together to support and strengthen the body. They allow the movement of the whole body to reach the target.

The respiratory system is also involved in this person's running performance. He has to breathe constantly to get enough oxygen while running and exhaling exhaust fumes.

The circulatory system transports oxygen to various cells in the body that use it on demand, especially muscle cells. The system also removes waste.

The nervous system controls all physical activity. It performs a variety of functions, including maintaining balance and coordination while running, alerting other players and focusing on the ball, and controlling a player's thoughts and strategies during the game.

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Solutions Buffer. pH of solution is adjusted by adding 0.10 M HCl to 100 mL of water. A buffer aids in pH maintenance while adding M NaCH. 3. COO (sodium acetate) (sodium acetate).

The negative log of the Ka is known as the pKa. All we would need to do is take the Ka and the negative log of it in order to determine the pKa for methanol. Therefore, the pKa is equal to the negative log of 2.9 x 10 16 .

There are distinct Ka and pKa values for each dissociation. The weak acid and its conjugate base are present in equal amounts when the moles of base added are half that of the total moles of acid. CB/WA is equal to 1, and the HH equation states that pH = pKa + log(1) or pH = pKa.

0.10 M HCl to 100 mL of water

pKa for methanol = 2.9 x 10 16 .

pH = pKa + log(1) or pH = pKa.

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A chemical reaction is a process in which one or more substances, also called reactants, are converted to one or more different substances, known as products.

What does the term chemical equation mean?

Hence, chemical reaction is the process.

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66.7 mL of Ethanol was dissolved in 222.2 mL of water. the volume % of the ethanol in the solution is 30.0 %.

Given that :

volume of the solute = 66.7 mL

volume of the solution = 222.2 mL

by using the volume % formula we can directly determine the volume % of ethanol, the percent by volume  expression is given as :

volume % = (volume of solute / volume of solution ) × 100 %

volume % = (66.7 / 222.2 ) × 100 %

volume % = 0.300  × 100 %

volume %  = 30 .0 %

( v / v ) % = 30.0 %

Thus, the percent by volume is 30.0 %.

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Answer:

The energy output objects that work with solar panels include solar inverters, charge controllers, batteries, and electric grid systems.

Explanation: