Imagine that instead of balls, you were rolling positively charged ions of the same element).
One ion has a +1 charge, one ion has a +2 charge, and one ion has a +3 charge. Instead of a
hair dryer, you now have a giant positively charged magnet. Which ion do you think would
be deflected the most by the magnet? Which ion would be deflected the least by the magnet?
Why?

Answer:

C. trigonal Planar

Explanation:

Tetrahedral is 4 connected

Bent is 2 connected with a lone pair

Linear is 2 connected in a line

Trigonal Planar is the one with 3 connected.

Answer:

C: Trigonal Planar

Explanation:

Tetrahedral is four connected

Bent is 2 linked with a lone pair

Linear is two connected in a line

Trigonal Planar is the one with 3 connected.

The total outer atoms present in a molecule with planar shape are four and total lone pairs are 2.

Square planar shape is formed when there are four bonds and two lone pairs on the central atom.

The four atoms that are attached to the central atom are known as the four outer atoms. These atoms are arranged in such a way that it makes the square shape. The outer atoms are not always fours. They can be 2,3 or four.

The lone pairs are present on the central atom.

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To make a 6.5 m solution with a volume of 3.25 L from an 18 m solution, we need to add 1.14 L of the original solution.

To calculate the volume of the original solution added, we can use the equation:

C1V1 = C2V2

where C1 is the initial concentration, V1 is the volume of the initial solution added, C2 is the final concentration, and V2 is the final volume of the diluted solution.

Plugging in the given values, we get:

(18 M) V1 = (6.5 M) (3.25 L)

Solving for V1, we get:

V1 = (6.5 M) (3.25 L) / (18 M)

V1 = 1.1389 L or approximately 1.14 L

Therefore, about 1.14 L of the original solution was added to make the 6.5 m solution with a volume of 3.25 L.

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Answer: B.

Explanation: The correct balanced equation for the reaction of iron with water in a single replacement reaction is:

B. 2Fe + 2H₂O → 2FeO + H₂

Explanation:

In a single replacement reaction, one element replaces another in a compound. In this case, iron (Fe) is replacing hydrogen (H) in water (H₂O). The products of the reaction are iron oxide (FeO) and hydrogen gas (H₂).

To balance the equation, we need to make sure that the same number of atoms of each element are present on both the reactant and product sides.

In option A, the equation is not balanced because there are two oxygen atoms on the reactant side and only one on the product side.

In option B, the equation is correctly balanced with two iron atoms, four hydrogen atoms, and two oxygen atoms on both sides of the equation.

In option C, the equation is not balanced because there is only one water molecule on the reactant side, while there are two iron oxide molecules and one hydrogen molecule on the product side.

In option D, the equation is not balanced because there are two hydrogen atoms on the reactant side and only one on the product side.

Answer:D. Fe + H₂O → FeO + H₂

Explanation:

Answer:

A. 1.50

Explanation:

9.01 x 1023 molecules* 1 mol/ 6.022×1023 molecules= 1.49618067087 moles

Rounded would be 1.50

To measure the concentration of lactose, one can use methods such as the enzymatic assay or high-performance liquid chromatography (HPLC). The assumption that must be made is that other sugars or compounds present in the sample do not interfere with the measurement.

The concentration of lactose can be measured using various methods such as enzymatic assays or high-performance liquid chromatography (HPLC). However, an assumption that must be made when measuring the concentration of lactose is that there are no interfering substances present that could interfere with the accuracy of the measurement. It is also important to ensure that the sample is properly prepared and the measurements are taken under controlled conditions to ensure the accuracy of the results.

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Answer:

The answer is Protein.

The molar concentration of imidazole in the final solution is approximately 0.595 M.

First, we need to calculate the mass of the imidazole added to the solution. Since we added four drops of 0.25 M imidazole solution, we can assume that the volume of each drop is approximately 0.05 mL (this value can vary depending on the size of the dropper).

Therefore, the total volume of imidazole solution added is:

4 drops x 0.05 mL/drop = 0.2 mL

To convert this volume to liters, we need to divide by 1000:

0.2 mL / 1000 = 0.0002 L

The moles of imidazole added to the solution can be calculated using the formula:

moles = M x V

where;

moles = 0.25 M x 0.0002 L = 0.00005 moles

Next, we can calculate the mass of ferrihemoglobin in the final solution:

mass = 2.739 g - 2.655 g = 0.084 g

To calculate the molar concentration of imidazole in the final solution, we can use the formula:

Molarity = moles of solute / volume of solution (in liters)

density of ferrihemoglobin = 1.0 g/mL (approximate value)

volume of ferrihemoglobin solution = mass / density = 0.084 g / 1.0 g/mL = 0.084 mL

If we assume that the volume of the imidazole solution is negligible compared to the volume of the ferrihemoglobin solution, we can use the total volume as:

volume of solution = 0.084 mL = 0.000084 L

Now we can calculate the molar concentration of imidazole in the final solution:

Molarity = 0.00005 moles / 0.000084 L = 0.595 M

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The given reaction is already balanced, that is to say tha the number of atoms in the reactants matches the number of atoms in the products. In the reaction, we can see the relationship between CaC2 and H2O. For each mole of CaC2 two moles of H2O react.

So, if 4.8 moles of CaC2 are consumed the moles of H2O needed will be:

Mol of H2O = Mol of CaC2 x 2

Mol of H2O = 4.8 x 2 = 9.6 mol of H2O

Now, to calculate the grams of H2O we will use the following equation and the mass molar of H2O.

Mass molar of H2O =18.01 g/mol

So, if 4.8 moles of CaC2 are consumed in this reaction, 172.9 g of H2O are needed

H₃PO₄ + 3Na HCO₃ →Na₃ PO₄ + 3H₂O + 3CO₂  is the  balanced chemical equation  for the following given  reaction .

A balanced equation is the equation that contains the same number of each type of atoms on both the left and right sides of the reaction arrow ,it means that both the reactants and the products are equal in the chemical reaction .

A neutralization reaction  is a chemical reaction in which an acid reacts with a base or alkali to form water and salt.

H₃PO₄ + 3Na HCO₃ →Na₃ PO₄ + 3H₂O + 3CO₂  is the  balanced chemical equation  for the following given  reaction .

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When hydrochloric acid (HCl) reacts with a metal, it will produce hydrogen gas (H₂) and a salt of the metal. The reaction is commonly referred to as a metal-acid reaction or a single displacement reaction.

The general chemical equation for the reaction between hydrochloric acid and a metal (M) is:

2HCl + M → MCl₂ + H₂

In this equation, two molecules of hydrochloric acid (2HCl) react with one atom of the metal (M), resulting in the formation of one molecule of metal chloride (MCl₂) and one molecule of hydrogen gas (H₂).

The specific metal chloride formed will depend on the identity of the metal involved in the reaction.

For example, if zinc (Zn) is the metal reacting with hydrochloric acid, the equation would be:

2HCl + Zn → ZnCl₂ + H₂

Similarly, if magnesium (Mg) reacts with hydrochloric acid, the equation would be:

2HCl + Mg → MgCl₂ + H₂

This reaction is commonly observed in chemistry experiments and is used to generate hydrogen gas or to study the reactivity of metals with acids.

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The new rate of the modified reaction will be 44mmmM/s which can be calculated by the rate of disappearance.

For this response, the rate of disappearance was calculated. The concentration will drop as it is consumed. After 54 minutes, the concentration dropped to 1.58 molar.

What is the reaction's speed?

Units are a way to express the reaction rate. HCl is characterized by a change in polarity of the compound per unit of time or per change in time. We have 1.85 Molar moving to 1.58 Molar in 54 minutes. Ten times as much negative three molar HCl would be produced each minute. People should subtract the initial polarity from the end one to do it correctly.

Because of the drug's concentration, we experience a negative rate of reaction. The fact that the rate is negative indicates that we are consuming.

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Answer:

C.

Explanation:

V/T=constant

The carbon-14 dating technique is used to date organic materials that were once living, such as plants or animals.

Therefore, option A (a granite rock) and option D (an iron nail) cannot be dated using this method as they are inorganic.

Option B (an old coin) could potentially be dated using carbon-14 if it is made of organic material, but many old coins are made of inorganic materials like metal alloys, so it would depend on the specific coin.

Option C (a 6000 year old plank from an old ship) is an example of an organic material that could be dated using carbon-14, as the plank was once part of a living tree that absorbed carbon from the atmosphere.

Overall, the carbon-14 technique is limited to dating materials that contain carbon and were once alive.

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If the hydrogen gas is combusted and produces 645L of water vapor at 400 kelvin and 1.75 atm, 2796.96 g mass of the zinc is produced .

Using the ideal gas law equation:

PV = nRT

n = (PV) / (RT)

= (1.75 atm * 645 L) / (0.0821 atm·L/(mol·K) * 400 K)

= 42.71 moles

the balanced equation for the reaction between zinc and hydrochloric acid:

Zn + 2HCl -> \(ZnCl_{2}\)  + \(H_{2}\)

1 mole of zinc produces 1 mole of hydrogen gas. Therefore, the moles of zinc are also 42.71.

The molar mass of zinc is 65.38 g/mol.

Mass of zinc = moles of zinc * molar mass of zinc

= 42.71 moles * 65.38 g/mol

= 2796.96 g

Therefore, the mass of the zinc is 2796.96 grams.

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An indicator of a chemical change which is shown in the image (see attachment) is: A.) formation of a gas.

A chemical change can be defined as a type of reaction that is typically characterized by a change in chemical composition and this leads to the formation of a new chemical substance.

This ultimately implies that, a chemical change would give rise to the chemical properties of matter by causing the transformation of one chemical substance into one or more different chemical substances.

In this context, we can infer and logically deduce that the formation of a gas is an indicator of a chemical change in the image (see attachment) shown below because the liquid turned to a gas when heat was applied.

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Complete Question:

Which indicator of a chemical change is shown?

A.) formation of a gas

B.) formation of a precipitate

C.) change in color

D.) change in energy

The above given statement is true.

A homogeneous mixture comprised of two or more components is referred to as a solution. Because they are consistently scattered at the molecular or ionic level, the components in a solution are evenly mixed and have a constant composition.

Until the reaction between the two solutions is complete, a solution of known concentration is gradually added to a solution of unknown concentration in a titration. The endpoint, or point at which the reaction is finished, is often identified by a color change that takes place after an indicator is added to the solution being titrated.

The reaction has achieved its endpoint when the solution in the flask changes color, and the new color persists even after the solution is gently shaken. At this time, the titration should be halted. By doing this, it is possible to precisely determine the concentration of the unknown solution and the volume of titrant added to the solution.

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Answer:

22.4 L

Explanation:

A gas at STP will possess the following;

Pressure (P) = 1 atm

Temperature (T) = 273K

General gas constant (R) = 0.0821 Latm/molK

Using the general gas law formula to calculate the volume a gas of 1 mol will contain;

PV = nRT

V = nRT/P

V = 1 × 0.0821 × 273 ÷ 1

V = 22.41/1

V = 22.4 litres

Determine quantitative density of a liquid whose mass is 62 g and whose volume is 31 mL. A block or wood with the dimensions 3 cm x 2 cm x 5 cm and a heft of 22.5 g (2 g/mL)

How do you calculate a block of wood's volume?

Result for an image A timber block weighs 22.5 grammes and has dimensions of 3 cm x 2 cm x 5 cm. What is that?

It is simple to determine the volume of such a block, prism, a cylinder by multiplying the base's area by the object's height or altitude.

How is block mass determined?

Multiply the volume and density together.

You may get the mass of your object by multiplying your two numbers together. You'll notice that you end up having units of mass if you keep track of both the units as you go along (kilograms or grams). A diamond, for instance, has a volume of 5,000 cm3 and a density of 3.52 g/cm3.

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Determine quantitative density of a liquid whose mass is 62 g and whose volume is 31 mL. A block or wood with the dimensions 3 cm x 2 cm x 5 cm and a heft of 22.5 g (2 g/mL)

Result for an image A timber block weighs 22.5 grammes and has dimensions of 3 cm x 2 cm x 5 cm. What is that?

It is simple to determine the volume of such a block, prism, a cylinder by multiplying the base's area by the object's height or altitude.

Multiply the volume and density together.

You may get the mass of your object by multiplying your two numbers together. You'll notice that you end up having units of mass if you keep track of both the units as you go along (kilograms or grams). A diamond, for instance, has a volume of 5,000 cm3 and a density of 3.52 g/cm3.

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Answer:

yes, because water is reacting with air and heat and creating a boiling effect.

Explanation: kracken doge

Answer: Freezing and boiling are considered to be examples of chemical reactions. This depends on their conception of substance. If students regard ice as a different substance from liquid water they are likely to classify the melting of ice as a chemical change.

Explanation:

Boiling water, boiling water is an example of a physical change and not a chemical change because the water vapor still has the same molecular structure as liquid water (H2O). No, boiling water is NOT a chemical reaction, but it is a physical change.

Answer:

laurasia and gondwana is the correct answer

Answer:

He is wrong . Most accurate is Buret .

Explanation:

The number of significant figure denotes the level of accuracy of a measurement .

Beaker can measure liquid in mL upto significant figure of 2 . That means it can measure volume in terms of 10 , 20 , 30mL etc . It can not measure 25 mL

accurately . The last figure of 28 mL is read by guess in the question . So it is not an accurate measurement .

Similarly , graduated cylinder can measure liquid upto significant figure of 3 .  That means it can measure volume in terms of 11 , 22 , 33 mL etc . It can not measure 25.5  mL accurately . The last figure of 28.3  mL is read by guess in the question . So it is less  accurate measurement .

Similarly , buret  can measure liquid upto significant figure of 4 .  That means it can measure volume in terms of 11.2 , 22.3 , 33.5 mL etc . It can not measure 25.53  mL accurately . The last figure of 28.32  mL is read by guess in the question . So it is most accurate among all the three instrument because it can measure accurately mL upto one tenth of it .

Answer:

No

Explanation:

The number of significant figure denotes the level of accuracy of a measurement .

Beaker can measure liquid in mL upto significant figure of 2 . That means it can measure volume in terms of 10 , 20 , 30mL etc . It can not measure 25 mL

accurately . The last figure of 28 mL is read by guess in the question . So it is not an accurate measurement .

Similarly , graduated cylinder can measure liquid upto significant figure of 3 .  That means it can measure volume in terms of 11 , 22 , 33 mL etc . It can not measure 25.5  mL accurately . The last figure of 28.3  mL is read by guess in the question . So it is less  accurate measurement .

Similarly , buret  can measure liquid upto significant figure of 4 .  That means it can measure volume in terms of 11.2 , 22.3 , 33.5 mL etc . It can not measure 25.53  mL accurately . The last figure of 28.32  mL is read by guess in the question . So it is most accurate among all the three instrument because it can measure accurately mL upto one tenth of it .

Hope this helps

A balanced chemical equation always obeys law of conservation of mass.

A  balanced chemical equation generally obeys to law of conservation of mass. As per this regulation the mass of items should be equivalent to the mass of reactants. A response is supposed to be adjusted when the complete mass of particles on the two sides of the substance response is equal.According to the law of conservation of mass, the mass of the items in a synthetic response should rise to the mass of the reactants.

The law of conservation of mass is helpful for various computations and can be utilized to tackle for obscure masses, such how much gas consumed or delivered during a reaction.They should submit to the Law of conservation of Mass that expresses that matter can't be made or obliterated, it is saved. The mass of the reactants should rise to the mass of the products.Thus, the mass of substances created in a synthetic response is consistently equivalent to the mass of responding substances. Consequently, you really want to have a similar number of each kind of component on each side of a synthetic condition. This is the entire reason for adjusting a synthetic condition.

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Answer:

Subconscious - psychic activity just below the level of awareness

Election - the act of electing someone

Explanation:

I hope this helped enough, good luck in chemistry!

Answer:

"Forensic science is a critical element of the criminal justice system. Forensic scientists examine and analyze evidence from crime scenes and elsewhere to develop objective findings that can assist in the investigation and prosecution of perpetrators of crime or absolve an innocent person from suspicion."

Explanation:

Strictly from: https://www.justice.gov/olp/forensic-science#:~:text=Forensic%20science%20is%20a%20critical,an%20innocent%20person%20from%20suspicion.

Forensic science is any science used to aid in a criminal/legal investigation

If a buffer solution with pH 8 turns acid with pH 1.4 after it an addition of a certain amount of strong acid, we can conclude that: A. The buffer capacity has been exceeded.

Buffer is a solution consisting of a weak acid and its conjugate base mixture and vice versa. A buffer solution can resist the change of pH if we add acidic or basic components or addition of water. Even if there is a change in pH, the difference is very little to none. A buffer has its capacity, which is the amount of base or acid (in moles) necessary to change the buffer’s pH by 1. Hence, when a basic buffer solution turns acidic, it means that the buffer capacity has been exceeded.

This question is incomplete. The complete query is as follows:

“If a certain amount of strong acid is added to a buffer solution with pH 8, and the pH after the addition of the acid is 1.4, what can we say about the solution?

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The situation in which the generator is able to produce more electricity is option D, the average height of each wave increases.

Water wave is a type of mechanical wave. Water wave is a transverse wave in which the oscillation of particles is along the direction of wave propagation.

The the water waves are highly energetic and this kinetic energy is converted to electric energy using turbines and generator. The height  to the crest of the wave from the base line is called amplitude. As the amplitude increases, energy of the wave is increasing.

Thus, more the amplitude, more the energy of wave leading to greater yield of electrical energy as well. Therefore, option D is correct.

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Answer: D

Explanation:

D - Decomposition of carbonates into oxide and carbon dioxide

A - Combustion reaction. Combustion of methane to form Carbon dioxide and water.

C - Reaction of reactive metal (Na) and water to form hydroxide.

B - No particular name of the reaction. Usually denoted as a synthesis redox reaction.

Answer:CaCO3  CaO + CO2

Explanation: just took it

Answer:

Always moving!

Explanation:

matter is composed of very small atoms and molecules that are always in contant motion