A student mixed several different 12 mm plastic beads together by mistake. Luckily the beads had different densities. One group of beads had a density of 0.6 g/cm3; the other beads had a density of 1.2 g/ cm3. Describe a method the student can use to sort the beads.

Answer:

The oxygen family, also know as the chalcogens, consists of the elements found in Group 16 of the periodic table and is the main group elements.

Elements: oxygen, sulfur, selenium, tellurium and polonium.

Hope this helps! :D

Answer:

Equation of Reaction = AgNO3 (aq) + NaCl (aq) → AgCl (s) + NaNO3 (aq)

Steps:

1. Find the moles of AgNO3 with formula n= Mass/Mr (molecular mass)

so you will get moles= 10.0/ 169.87 = 0.05886854654

2. Using stoichiometry you know the equation has 1 mole so the moles of AgCl are gonna be the same; therefore, you will use again the same formula.

3.  moles= mass/molecular mass

0.05886854654 = x/ 143.32

You rearrange the formula to find the mass

so mass = moles x molecular mass

mass = 0.05886854654 x 143.32

mass= 8.44 grams

Explanation:

The maximum number of electrons that can occupy 2p orbitals is six.

In atomic theory, each orbital has a maximum capacity for two electrons, one with a spin-up (+1/2) and the other with a spin-down (-1/2). The 2p orbitals consist of three separate orbitals labeled as 2px, 2py, and 2pz. These orbitals are oriented along the x, y, and z axes, respectively.

Since there are three 2p orbitals, the total number of electrons that can occupy them is 2 electrons per orbital x 3 orbitals = 6 electrons. This means that each of the 2p orbitals can accommodate a maximum of two electrons.

The 2p orbitals are higher in energy than the 2s orbital, and they are typically filled after the 2s orbital in the electron configuration of atoms. Understanding the maximum electron capacity of orbitals is important for determining the electronic structure and chemical behavior of elements.

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Answer:

Gold(I) Nitride Au3N Molecular Weight -- EndMemo

The earth inner core composed of solid iron is the hottest layer because it is at the center of the Earth, but pressure from the outer layers makes it solid layer.

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Answer:

It can be described as an atom

Answer:

moles = no. of molecules / Avogadro's number

         = 2.26 x 10^33 / 6.022 x 10^23

         = 3752906011

Round to significant figures which is 3 = 3.75 x 10^9 mol

Explanation: The formula for finding how many moles of a substance when given the amount of molecules is: moles = number of molecules / Avogadro's number

In order to write balanced half-reactions for the oxidation and reduction that occur in a chemical reaction, we first need to identify the species being oxidized and reduced. The (aq) and (s) labels indicate the states of the reactants and products.

Let's assume the reactants are A(aq) and B(s), and the products are C(aq) and D(s).

The oxidation half-reaction involves the species being oxidized, which loses electrons. The reduction half-reaction involves the species being reduced, which gains electrons.

To balance the half-reactions, we need to ensure that the number of atoms on both sides of the equation is the same and that the charges are balanced.

For example, if A is being oxidized and B is being reduced, the balanced half-reactions could be:

Oxidation half-reaction:
A(aq) → C(aq) + e-

Reduction half-reaction:
B(s) + e- → D(s)

So, the oxidation half-reaction is A(aq) → C(aq) + e- and the reduction half-reaction is B(s) + e- → D(s). To write the balanced half-reactions, we need to ensure that the number of atoms on both sides of the equation is the same and that the charges are balanced. In the oxidation half-reaction, A(aq) is being oxidized and loses an electron (e-). The resulting product is C(aq). On the other hand, in the reduction half-reaction, B(s) is being reduced and gains an electron (e-). The resulting product is D(s). By balancing the atoms and charges, we can write the balanced half-reactions as follows:
Oxidation half-reaction: A(aq) → C(aq) + e-
Reduction half-reaction: B(s) + e- → D(s)

The balanced half-reactions for the oxidation and reduction in the chemical reaction are A(aq) → C(aq) + e- and B(s) + e- → D(s), respectively.

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Answer:

b) 689,000mm

as 1m= 1000mm

Answer:

A

Explanation:

mark me brainlisted please

Considering the Charles' law and STP conditions, the volume at 100°C is 30.60 L.

Charles' law establishes the relationship between the volume and the temperature of a sample of gas at constant pressure and establishes that when the temperature is increased the volume of the gas also increases and that when cooling the volume decreases.

Mathematically, Charles's law is expressed as:

V÷T=k

where:

V is the volume.

T is the temperature.

k is a constant.

Analyzing an initial state 1 and a final state 2, it is fulfilled:

V₁÷T₁= V₂÷T₂

The STP conditions refer to the standard temperature and pressure. Pressure values at 1 atmosphere and temperature at 0 ° C are used and are reference values for gases. And in these conditions 1 mole of any gas occupies an approximate volume of 22.4 liters.

In this case, you know:

Replacing in Charles' law:

22.4 L÷ 273 K= V₂÷ 373 K

Solving:

(22.4 L÷ 273 K)× 373 K= V₂

30.60 L= V₂

Finally, the final volume is 30.60 L.

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Covalent bonds are formed when atoms of elements share electrons.

A covalent bond is a type of chemical bond where two atoms are connected to each other by the sharing of two or more electrons.

These electron pairs are known as shared pairs or bonding pairs and they form when the difference between the electronegativities of two atoms is too small for an electron transfer to occur to form ions.

For example, in a chemical compound HCl, it can be said that hydrogen and chlorine are joined by covalent bonding.

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The number of moles in the 5.73 Kg sample of lactic acid, C₃H₆O₃, is 63.61 moles

The relationship between number of mole and molar mass is given below:

Number of mole = mass / molar mass

With the above formula, we can obtain the number of mole in the 5.73 Kg sample of lactic acid, C₃H₆O₃. Details below:

Mole = mass / molar mass

Number of mole of C₃H₆O₃ = 5730 / 90.078

Number of mole of C₃H₆O₃ = 63.61 moles

Thus, the number of mole of the lactic acid, C₃H₆O₃ is 63.61 moles

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Out of the given options, only option I and III have a pH of 2. This is because the pH of a solution is determined by the concentration of hydrogen ions (H+) in the solution. Hydrochloric acid (HCl) is a strong acid and fully dissociates in water to release hydrogen ions. Therefore, the concentration of hydrogen ions in a hydrochloric acid solution is equal to the concentration of the acid.

Option I has a smaller volume of hydrochloric acid solution, but it has a higher concentration of 0.01 mol dm−3. This means that it has a higher concentration of hydrogen ions, leading to a lower pH of 2.

Option III has the same concentration of hydrochloric acid as option I, but it has a larger volume of 500 cm3. This means that it has a lower concentration of hydrogen ions compared to option I, but still enough to have a pH of 2.

Option II has a higher concentration of 0.02 mol dm−3, but it has a much larger volume of 1000 cm3. This leads to a lower concentration of hydrogen ions and a higher pH of around 2.7.

In summary, the concentration and volume of the hydrochloric acid solution are important factors in determining the pH of the solution. Options I and III have the same concentration of 0.01 mol dm−3 but differ in volume, leading to the same pH of 2. Option II has a higher concentration but a larger volume, leading to a higher pH of around 2.7.

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Answer:

A raised weight.,Water that is behind a dam,A car that is parked at the top of a hill.----potential energy

The second law of thermodynamics is a physical law based on universal experience concerning heat and energy interconversions. 

Answer:

2.94 grams Nickle

Explanation:

All they are asking is to convert moles to grams

To do this, find the atomic mass of nickel using the periodic table: 58.693 g

0.05 mol * 58.693 g/1 mol = 2.93465 grams

The muscles of the stomach crush food that has entered the stomach cavity is a physical change. The correct option is D. a physical change.

Digestion is the breakdown of food material in the stomach, which produce energy.

Digestion includes a chemical and physical process. The food is digested by the chemicals present in the stomach.

Thus, the correct option is D. a physical change, only.

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When table salt (sodium chloride which ionizes into Na and Cl) is added to alginate, a gel does not form and spherification does not occur. This happens because the salt only has one positive charge that neutralizes the negative charge in the alginate.

There are various types of Spherification. Spherification is the creation of small spheres with a thin film on the surface and a liquid center. The process of spherification is mostly used in molecular gastronomy to make small, flavorful balls of liquid ingredients that burst in the mouth when bitten into. The method involves a process of encapsulating liquid droplets in a sphere made of a gel-like film. This process requires sodium alginate (E401), a gel-forming ingredient that thickens the liquids.

Sodium alginate gelation occurs as a result of the mixture of an alginate solution with a cation solution that causes the solution to gel. The sodium ions present in the solution swap with calcium ions present in the cation solution, causing a gel to form. This occurs as a result of a chemical reaction known as cross-linking. When table salt is added to the alginate solution, a gel does not form and spherification does not occur since the salt only has one positive charge that neutralizes the negative charge in the alginate. Alginate requires a doubly charged cation to cross-link.

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Answer:

sodium=atomic number 11 it electronic configuration is ,K=2, L=8,M=1 Valence is 1

oxygen= atomic number 8 it electronic configuration is K=2, L=6 Valence is 2

iron= atomic number 26 it electronic configuration is K= 2 L= 8,M=8 N=6 Valence 2

Answer: A=1

B=6

C=8

Explanation:

Answer:

it's volume also decrease

Answer:

100grams

Explanation:

law of conservation of mass

if the chemical or whatever, quantity is given then it stay the same in the beginning and the end. Just add them in the end and if something is missing that means you have done something wrong i am just telling for experiment

a. To determine the concentration of the unknown acid, you would need to perform a titration with a known concentration of a strong base like NaOH. Follow these steps:

1. Record the volume of the unknown acid solution used.

2. Record the initial and final burette readings of NaOH.

3. Calculate the volume of NaOH used in the titration.

4. Write a balanced equation for the reaction between the unknown acid and NaOH.

5. Use stoichiometry to find the moles of acid reacted.

6. Divide the moles of acid by the volume of the unknown acid solution used (in liters) to find the concentration.

b. To determine the Ka of the unknown acid, you will need additional information, such as the pH at the half-equivalence point (where half of the acid has been neutralized) or the pH and concentration of the acid after a certain amount of NaOH has been added. Then, you can use the following steps:

1. Write the balanced equation for the dissociation of the acid in water.

2. Use the given pH information to find the concentration of H+ ions.

3. Use the stoichiometry of the reaction to find the concentration of the other species in the equation.

4. Write the expression for Ka, which is [products]/[reactants].

5. Plug the concentrations into the Ka expression and solve for Ka.

c. When choosing an indicator for a titration, you should select one whose pH range (the range over which the indicator changes color) coincides with the pH of the equivalence point (where the acid is completely neutralized). You will need to determine the pH of the equivalence point, then choose an indicator that changes color within that pH range.

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If you then increase the intensity of the 4.5 eV light, you will notice that the photons would come off at higher speeds.

Light intensity refers to the strength or amount of light produced by a specific lamp source.

Intensity of light measures of the wavelength-weighted power emitted by a light source.

Mathematically, the intensity of light source is given as;

I = P/A

where;

Increasing the light intensity (photon energy per second per unit area) increases the rate at which electrons leave the metal, and the electrons have more kinetic energy.

Thus,  if you then increase the intensity of the 4.5 eV light, you will notice that the photons would come off at higher speeds.

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Answer:A

Explanation: Since the boiling point is 212. As salt keeps getting added the boiling temperature keeps going up. Meaning it will boil at a high temp.

Yes, not allowing reactants in a   to have enough time to fully react can count as human error in a lab. In chemistry, reaction time is an essential factor in determining the completeness and efficiency of a chemical reaction.

If the reactants are not given sufficient time to react, the reaction may be incomplete, leading to inaccurate or inconsistent results. This can happen due to human error, such as not monitoring the reaction time or not following the reaction protocol correctly.

Therefore, ensuring proper reaction time is crucial to obtain reliable and accurate results in a lab.

First, we will calculate the number of moles of mixture of Xenon and Neon gases.Number of moles of mixture of Xenon and Neon gases:

Let x be the mole fraction of Neon.

Therefore, (1 - x) is the mole fraction of Xenon

.Mole fraction of Neon + Mole fraction of Xenon = 1x + (1 - x) = 1x = 1 - (1 -

x = 0 + x

x = 0.279

Mole fraction of Neon = 0.279

Mole fraction of Xenon = 0.721

Number of moles of gas = (Total Pressure * Volume)/(Gas Constant * Temperature)

Number of moles of Xenon = (7.10 atm * 16.75L * 0.721)/(0.08206 * (273 + 30))

Number of moles of Xenon = 8.44 moles

Number of moles of Neon = (7.10 atm * 16.75L * 0.279)/(0.08206 * (273 + 30))

Number of moles of Neon = 3.29 moles

Now, we can calculate the partial pressure of Xenon and Neon.

Partial pressure of Xenon:

Partial Pressure of Xenon = Mole fraction of Xenon * Total Pressure

Partial Pressure of Xenon = 0.721 * 7.10 atm

Partial Pressure of Xenon = 5.12 atm

Partial pressure of Neon

Partial Pressure of Neon = Mole fraction of Neon * Total Pressure

Partial Pressure of Neon = 0.279 * 7.10 atm

Partial Pressure of Neon = 1.98 atm

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Answer:

Because the amount of liquid water decreases and the amount of dissolved salt remains constant, the concentration of salt in the liquid water around the iceberg will increase.

Explanation:

Answer:

Because the amount of liquid water decreases and the amount of dissolved salt remains constant, the concentration of salt in the liquid water around the iceberg will increase.

Explanation:

PLATO exact answer

Answer:

No

Explanation:

No the explanation is not correct as mass of the object is same in the entire universe. Whereas the weight of objects changes from planet to planet as gravitation pull of planets changes.

The explanation of Bailee is not correct here. An object's mass is a physical property that is unaffected by gravitational pull. Therefore, it won't change depending on the world.

The amount of matter in a thing is determined by that object's mass. No matter if an object is on the moon or the earth, it still contains the same quantity of matter. As a result, an object's mass measured on the moon is equal to that measured on Earth.

A human would weigh six times less on the moon than they do on Earth because the gravitational pull of the moon is only around 16.6% of that of the Earth.

Thus the given explanation is incorrect.

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The straight-line distance from your house to the stadium is approximately 1341.64 meters.

To find the straight-line distance from your house to the stadium, we can use the Pythagorean theorem, which states that in a right triangle, the square of the hypotenuse (the side opposite the right angle) is equal to the sum of the squares of the other two sides.

In this case, let's consider the north-south distance as the vertical leg of the triangle and the east-west distance as the horizontal leg. The north-south distance is 1200 m south, and the east-west distance is 600 m west.

Using the Pythagorean theorem, we can calculate the straight-line distance as follows:

Distance^2 = (1200 m)^2 + (600 m)^2

Distance^2 = 1440000 m^2 + 360000 m^2

Distance^2 = 1800000 m^2

Distance = √1800000 m

Distance ≈ 1341.64 m

Therefore, the straight-line distance from your house to the stadium is approximately 1341.64 meters.

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You could say either protons or neutrons.