. How would you separate a mixture of wood powders, iron powders, aluminum powders, and salts?

Small airborne particles of solid substances such as grain, flour, sugar, coal, metal, or sawdust are commonly known as dust.

Dust is an accumulation of small particles that are released into the air through various activities such as cutting, grinding, drilling, or blasting. These activities generate a lot of fine dust particles, which can cause respiratory problems when inhaled. The type of dust generated depends on the source material and the nature of the activity. For example, sawdust is generated during woodworking, flour dust is common in bakeries, and coal dust is generated in coal mines.

Dust particles are classified based on their size, with the smallest particles being the most dangerous. Fine dust particles, also known as PM2.5, are small enough to penetrate deep into the lungs and can cause a range of health problems such as asthma, bronchitis, and lung cancer. Long-term exposure to dust can also lead to chronic respiratory diseases. Dust control measures such as ventilation, dust suppression, and personal protective equipment can help reduce the risk of dust exposure in workplaces.

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Answer:

9.370 x 10 to the 23 molecules

Explanation:

91.72/1 x 1 mole Co/58.933g x 6.02 x 10 to the 23/1 mole Co

Answer:

Explanation:

Mass 1 mole of CO

C = 12

O = 16

m = 28

Mols of 91.72 grams

m = given Mass / Molar Mass

m = 91.72 / 28

m = 3.28 mols

Molecules

1 mol of anything is 6.02 * 10^23 molecules (in this case)

3.28 mol of CO = x

1/3.28 = 6.02*10^23/x      Cross multiply

x = 3.28 * 6.02 * 10^23

x = 1.97 * 10^24

In addition to oxygen (O2) and nitrogen (N2), other gases that contribute to the total pressure include carbon dioxide (CO2), water vapor (H2O), and traces of other gases such as argon (Ar), helium (He), and neon (Ne).

Carbon dioxide is produced as a waste product of cellular metabolism and is transported from the tissues to the lungs for exhalation. It contributes to the partial pressure of gases in the alveoli.

Water vapor is produced through the process of respiration and adds to the total pressure. As we breathe, the air gets humidified in the respiratory tract, leading to the presence of water vapor in the alveoli.

Traces of other gases, such as argon, helium, and neon, are present in the atmosphere in small quantities and can also contribute to the total pressure in the alveoli. However, their concentrations are much lower compared to oxygen and nitrogen.

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Answer:

here are the answers babe. Feel free to ask for more

The limiting reagent will be Al

They are reagents that limit the quantity of products that are formed in reactions.

From the equation of the reaction:

\(4Al + 3O_2 --- > 2Al_2O_3\)

The mole ratio of Al to O2 is 4:3.

With 2 moles of Al and 2 moles of O2, Al becomes limiting while O2 is in excess.

With 2 moles of O2, the amount of Al required should be:

                          2 x 4/3 = 2.67 moles.

With 2 moles of Al, the amount of O2 required should be:

                    2 x 3/4 = 1.5 moles

Thus, O2 is in excess by 0.5 moles.

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The name of the functional group of the hydrocarbon that has a chemical formula of CH3OH is alcohol (OH). Details about alcohol can be found below.

In chemistry, a functional group is a specific class of a group of compounds that determines the chemical properties of the group.

The hydrocarbon given in this question has the chemical formula of CH3OH is methanol. Methanol as the name implies has a functional group called alcohol.

Therefore, the name of the functional group of the hydrocarbon that has a chemical formula of CH3OH is alcohol (OH).

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The most likely route to forming a cyclopentyl reagent from an amide would involve deprotonation of the amide with a strong base, such as lithium diisopropylamide (LDA), followed by treatment with an alkyl halide. The amide would be deprotonated, resulting in a carbanion that could be reacted with the alkyl halide, forming a new alkyl carbocation. A subsequent nucleophilic attack from a Lewis base, such as the conjugate base of the amide, would lead to formation of the cyclopentyl reagent.

This reaction can also be accomplished by a single-step procedure involving a Grignard reagent, such as ethylmagnesium bromide, and the amide. The Grignard reagent is deprotonated by the amide, and the resulting carbanion is reacted with the alkyl halide, resulting in a new alkyl carbocation. A subsequent nucleophilic attack from a Lewis base, such as the conjugate base of the amide, would lead to formation of the cyclopentyl reagent.

Therefore, the most likely route to forming the cyclopentyl reagent from the starting amide would involve deprotonation of the amide with a strong base followed by treatment with an alkyl halide. Alternatively, a single-step procedure using a Grignard reagent and the amide could also be used.

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Answer:

the substance with 169 melting point is buten

Answer:

The fixed position that describes the position or velocity of a body is called Vector.

Explanation:

Vector tells the magnitude and direction of an object.

Hop it helps ♥️♥️♥️

The name given to an aqueous solution of HBr is "hydrobromic acid." Option E is correct.

Hydrobromic acid (HBr) is a strong acid that forms when hydrogen bromide gas dissolves in water. It is a clear, colorless liquid having a pungent odor as well as it is highly corrosive. Hydrobromic acid is commonly used in the laboratory and in various industrial applications, including the production of pharmaceuticals, dyes, and other chemicals. It is also used as a reagent in organic chemistry for various types of reactions.

An aqueous solution is the solution in which water will be the solvent. In other words, it is a solution where water is the substance that dissolves other substances, which are called solutes. Many substances can dissolve in water to form aqueous solutions, including salts, acids, and bases.

Hence, E. is the correct option.

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--The given question is incomplete, the complete question is

"The name given to an aqueous solution of HBr is . group of answer choices A) bromic acid B) hypobromous acid C) hydrogen bromide D) bromous acid E) hydrobromic acid."--

Answer:

C

Explanation:

plum- pudding atomic model is an atom that had a positively charged medium, or space, with negatively charged electrons inside the medium.

The correct answer is (A) A description of atoms being balls of positive charge with electrons scattered outside.

Option (A) is correct because the atom was a sphere of positive charge with negatively charged electrons scattered around the atom like plums in a pudding.

So , Rest  options that are B , C and D are incorrect.

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Answer:

Released energy

Explanation:

Answer:

The answer is: Released energy

Hope this helped <33

Explanation:

Answer:

Explanation:

The mass of the volleyball can be found by using the formula

\(m = \frac{f}{a} \\ \)

f is the force

a is the acceleration

From the question we have

\(m = \frac{7}{10} = 0.7 \\ \)

We have the final answer as

Hope this helps you

Answer:

hydrogen nitride

Explanation:

since they are bounding they would become a compound, and so it would need to expand

Answer:

As the temperature increases, the rate of a reaction increases.

Explanation:

The rate of the reaction increases because as the temperature increases, the kinetic energy of the molecules increases. The increased kinetic energy means that more molecules have enough energy to overcome the activation energy, that the collision frequency increases, and that the probability of molecular collision with the correct orientation to occur increases.

Molecules react when they collide with other molecules with enough energy + orientation, so the increased temperature would overall increase the rate of the reaction.

Explanation:

Metals conduct electricity, while non-metal do not conduct electricity.

Answer: a electrons flow in the opposite direction

Explanation:

i just got it wrong on the quiz

An electrolytic cell is different from galvanic cell  as electrons flow in opposite direction in electrolytic cell as that of in galvanic cell.

Electrolysis is defined as a process that makes of an electric current to drive a non-spontaneous chemical reaction. It is an important process for purification and extraction of metals from their ores.It makes use of an electrolytic cell in which two electrodes are present.

The two electrodes are the cathode and anode where reduction and oxidation reactions take place respectively.In the electrolysis of water hydrogen is collected at cathode and oxygen is collected at anode.Electrolytic cell set up is used in purification of metals .

Electrolytic cell is an electrochemical cell which makes use of external source of electrical energy.

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The question requires us to explain the differences in radii of neutral atoms, cations and anions.

To answer this question, we need to keep in mind that a neutral atom presents the same number of protons (positive particles) and electrons (negative particles). Another important information is that the protons are located in the nucleus of the atom, while the electrons are around the nucleus. Also, there is an electrostatic force between protons and electrons, which means that they the protons tend to attract the electrons to the nucleus.

While a neutral atom presents the same number of protons and electrons, a cation is an ion with positive charge, which means it has lost one or more electrons. In a cation, the balance between protons and electrons doesn't exist anymore: now, there is more positive than negative charge (more protons than electrons), and the overall attractive force that the protons have for the electrons is increased. As a result, the electrons stay closer to the nucleus and the radius of a cation is smaller than the neutral atom from which it was derived.

On the other side, anions present negative charge, which means they have received electrons. Similarly to cations, the balance between protons and electrons doesn't exist anymore, but in this case, there are more electrons than protons. In an anion, the overall attractive force that the protons have for the electrons is decreased. As a result, the electrons are "more free" to move and, as they are not so attracted to the nucleus, they tend to stay farther from the positive nucleus compared to the neutral atom - because of this, the radius of an anion is larger than the neutral atom from which it was derived.

Ocean and wind currents are both caused by

So,option A is correct one.

The air that moves in a river like a flow in a particular direction is called wind current.

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Answer:

Picture 1: Unhealthy

Picture 2: Healthy

Explanation:

Too much algae can start releasing toxins into the air burning the ozone hole and affecting climate change

Invertebrates are healthy, like bees who make honey for us., In truth most bugs we need in this world, even if we don't notice them

Brainliest please

The carbon intermediate generated via homolytic bond cleavage of a C-C sigma bond is called a carbon radical.

When a C-C sigma bond undergoes homolytic bond cleavage, it means that the bond is broken in a way that each bonding electron is split equally between the two carbon atoms. This process leads to the formation of two carbon radicals.

A radical is a highly reactive species that possesses an unpaired electron. In the case of the carbon radical generated from the cleavage of a C-C sigma bond, one carbon atom retains the unpaired electron, while the other carbon atom also possesses an unpaired electron. These carbon radicals are represented as •C and •C, where the dot represents the unpaired electron.

Due to the presence of the unpaired electron, carbon radicals are highly reactive and tend to participate in chemical reactions to attain stability. They can engage in various reactions, such as radical addition, radical substitution, or radical polymerization, by either accepting or donating an electron to another atom or molecule.

Overall, the carbon intermediate generated via homolytic bond cleavage of a C-C sigma bond is known as a carbon radical, which is a highly reactive species with an unpaired electron.

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i think it is D

ffffffffffffffffffffffffffffffffffffffuuuuuuuuuuuuuuuuuuuuuuuuuunnnnnnnnnnnn

Answer: 1. Unbalanced

2. Atoms cannot be created or destroyed only rearranged

Explanation:

No, it does not pass the "fat pencil" test. Therefore, a normal distribution is not a reasonable model. Option B is the correct answer.

The "fat pencil" test is a quick visual check to determine if a dataset can be reasonably approximated by a normal distribution. In this case, the pH readings of wastewater show a significant deviation from a normal distribution. The presence of several low pH values (1.0) and a few high pH values (10.0, 10.5, 11.4) indicate a non-normal distribution with skewness and potential outliers. Therefore, it is not reasonable to model these data using a normal distribution.

Option B is the correct answer.

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Answer:

O₂(g), Br₂(l) Fe(s), He(g)

Explanation:

Those elements that occur naturally in nature are the right answers because it took nothing to make them

Delta. Hf = 0 means no heat was lost or gained

standard enthalpy of formation is defined as the change in enthalpy when one mole of a substance in the standard state is formed from its pure elements under the same conditions

O₂(g): Yes, it is a pure element in the standard state.

N(g): No, the pure element in the standard state is N₂(g).

H₂O(l): No, it is not a pure element but a compound.

Br₂(l): Yes, it is a pure element in the standard state.

Fe(s): Yes, it is a pure element in the standard state.

He(g): Yes, it is a pure element in the standard state.

S₆(s): No, the pure element in the standard state is S₈(s, rhombic).

socraticorg

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Answer:

geologic time scale

hope this helps

have a good day :)

Explanation:

Answer:

Iodine. The reaction between hot iron and iodine vapor produces gray iron(II) iodide, and is much less vigorous. This reaction, the equation for which is given below, is difficult to carry out because he product is always contaminated with iodine. Iodine is only capable of oxidizing iron to the +2 oxidation state.