Calcium carbonate crystals can be distinguished from bacteria by: _________

Answer: 4 FeSO4(s) + O2(g) + 10 H2O(l) ---> 4 Fe(OH)3 + 4 H2SO4

Explanation:

FeSO4(s) + O2(g) + H2O(l) = Fe(OH)3 + H2SO4

In other to balance the equation, the total number of atoms of each element on the Left Hand Side (LHS) of the equation must be equal to the total number of atoms on the  Right Hand Side (RHS) of the equation.

Add the following coefficients to the equation;

FeSO4 = Add 4,  H20 = Add 10,  Fe (OH)3 = Add 4 and H2SO4 = Add 4

By doing this, you will discover that the total number of atoms on bothe sides of the equation are balanced; thus we have;

4 FeSO4(s) + O2(g) + 10 H2O(l) ---> 4 Fe(OH)3 + 4 H2SO4

Answer:

D

Explanation:

Oxygen is an element.

sugar is a hydrocarbon derivative.

water is a compound made of hydrogen and oxygen. There are no metals in it at all.

So you are left with Halite. The common name for halite is salt. The chemical formula is NaCl

Answer: D

The statement "a neutral carbon atom has six protons in its nucleus, which means two electrons in the first energy level and the remaining four in the second energy level" is true.

This is because the number of protons in an atom's nucleus determines the atomic number, which in turn determines the number of electrons in a neutral atom.

Carbon has an atomic number of 6, which means it has 6 protons and 6 electrons.

The electrons in a carbon atom occupy the first and second energy levels, with 2 electrons in the first energy level and the remaining 4 electrons in the second energy level.

Therefore, the statement "a neutral carbon atom has six protons in its nucleus, which means two electrons in the first energy level and the remaining four in the second energy level" is true.

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The amount of fertilizer you need for 1,000 square feet depends on the type of fertilizer and the nutrient content of the fertilizer.

In order to determine how many pounds of fertilizer you need for 1,000 square feet, you will need to know the nutrient content of the fertilizer and the size of the area you want to fertilize. The most common nutrient contents are nitrogen (N), phosphorus (P), and potassium (K).

For example, if you want to apply a fertilizer with an N-P-K ratio of 10-5-5 to 1,000 square feet, you will need to calculate the pounds of fertilizer required based on the nitrogen content. If you want to apply 1 pound of nitrogen per 1,000 square feet, you will need to apply 10 pounds of the fertilizer (10% N).

If you want to apply a different fertilizer with a different nutrient content, you will need to adjust the amount of fertilizer accordingly. You can use a fertilizer calculator to determine the exact amount of fertilizer you need based on the nutrient content of the fertilizer and the size of the area you want to fertilize.

It is important to follow the instructions on the fertilizer bag or container carefully to avoid over-fertilizing or under-fertilizing your lawn or garden. Over-fertilizing can damage plants and harm the environment, while under-fertilizing can result in poor plant growth and development.

The amount of fertilizer you need for 1,000 square feet depends on the nutrient content of the fertilizer and the size of the area you want to fertilize. You can use a fertilizer calculator or follow the instructions on the fertilizer bag or container to determine the correct amount of fertilizer to apply. It is important to apply fertilizer carefully and according to the instructions to avoid damaging plants or harming the environment.

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Answer:

#Ar atoms = 1.47 x 10²²

Explanation:

PV = nRT => n = PV/RT

P = 8.80 X 10⁵ mmHg =  8.80 X 10⁵ mmHg/760mmHg·atm⁻¹ = 11.58atm

V = 137ml = 0.137 Liter

n = ? moles Ar = ? moles Ar x 6.02 x 10²³ Atoms Ar/mole Ar

R = 0.08206 L·atm/mol·K

T = 794K

PV = nRT => n = PV/RT = 11.58atm·0.137L / 0.08206L·atm/mol·K·794K

=> n = 0.0243mole Ar = 0.0244mole Ar x 6.02 x 10²³ atoms Ar/mole Ar

= 1.47 x 10²² atoms Ar

The usage of plastic bags and the level of awareness among people in your locality. Summarize the findings in a report or presentation, highlighting key findings and any recommendations for promoting sustainable alternatives to plastic bags.

As an AI language model, I don't have direct access to real-time data or the ability to conduct surveys. However, I can provide you with a general framework for conducting a survey on the usage of plastic bags and awareness among people. Here are the steps you can follow:

Define your survey objectives: Determine the specific information you want to gather about the usage of plastic bags and people's awareness. This will help you design appropriate survey questions.

Create survey questions: Develop a set of questions that capture the key aspects you want to investigate. These may include questions about the frequency of plastic bag usage, reasons for using or not using them, knowledge about the environmental impact, and willingness to adopt alternatives.

Determine the sample size: Decide on the number of respondents you want to survey. Aim for a sample size that provides a representative perspective of your locality, but keep in mind the practicalities of reaching out to and collecting responses from the selected participants.

Select participants: Randomly select or identify individuals within your locality to participate in the survey. Consider diversifying the sample to include people of different ages, occupations, and backgrounds for a more comprehensive understanding.

Draw conclusions and report findings: Based on the analyzed data, draw conclusions about the usage of plastic bags and the level of awareness among people in your locality. Summarize the findings in a report or presentation, highlighting key findings and any recommendations for promoting sustainable alternatives to plastic bags.

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Answer:

protons.......................

you would find protons and neutrons

A liquid is allowed to evaporate and leaves no residue. It can not be determined whether it was an element, a compound, or a mixture.

A water vapor molecule stays roughly 10 days in the atmosphere after it has evaporated. Water vapor starts to cool back down as it ascends higher in the atmosphere. The water vapor condenses when it becomes cold enough, turning it back into liquid water. Eventually, individual water droplets will condense to create clouds and precipitation.

It is not possible to determined whether it would be an element, a compound and mixture because the size of the particle will be too less.

A method for separating homogenous mixtures with one or even more dissolved salts is called evaporation. The procedure separates the liquid from the solid components. Usually, the procedure entails heating the combination until there is no more liquid is present.

Therefore, it can not be possible to determined whether it was an element, a compound, or a mixture by evaporation.

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Answer:

V₂ = 1.41 L

Explanation:

Given data:

Initial temperature = 35°C (35 +273.15 K = 308.15 K)

Initial volume = 1.5 L

Final temperature = 17°C (17+273.15 K = 290.15 K)

Final volume = ?

Solution:

The given problem will be solve through the Charles Law.

According to this law, The volume of given amount of a gas is directly proportional to its temperature at constant number of moles and pressure.

Mathematical expression:

V₁/T₁ = V₂/T₂

V₁ = Initial volume

T₁ = Initial temperature

V₂ = Final volume  

T₂ = Final temperature

Now we will put the values in formula.

V₁/T₁ = V₂/T₂

V₂ = V₁T₂/T₁  

V₂ = 1.5 L × 290.15 K / 308.15 k

V₂ = 435.23 L.K / 308.15 k

V₂ = 1.41 L

The concentration  of Ag+ ions = 1080 ppm (option B)

Since AgNO3 dissociates completely in water, the concentration of Ag+ ions will be the same as the concentration of AgNO3, which is 0.01M.

Convert the concentration from moles per liter (M) to grams per liter (g/L). To do this, multiply the concentration by the molar mass of Ag+ (108 g/mol):
0.01 mol/L × 108 g/mol = 1.08 g/L

Convert the concentration from g/L to parts per million (ppm). To do this, multiply the concentration by 1,000,000:
1.08 g/L × 1,000,000 = 1,080,000 ppb

Since 1,080,000 ppb is equivalent to 1,080 ppm, the correct answer is:

b) 1080 ppm

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1)

methyl

CH3 (mol)

CH3- (struc)

2)

ethyl

C2H5

CH3-CH2-

3)

propyl

C3H7

CH3-CH2-CH2-

4)

butyl

C4H9

CH3-CH2-CH2-CH2-

5)

pentyl

C5H11

CH3-CH2-CH2-CH2-CH2-

6)

hexyl

C6H13

CH3-CH2-CH2-CH2-CH2-CH2-

7)

heptyl

C7H15

CH3-CH2-CH2-CH2-CH2-CH2-CH2-

8)

octyl

C8H17

i will stop writing the condensed formula ust add another CH2

9)

nonyl

C9H19

10)

decyl

C10H21

11)

Undecyl

C11H23

12)

dodecyl

C12H25

Answer:

no it's is false because an electron have negative charges and it is not inside the atom and it is found out side the nucleus

The chemical formula for the compounds in the photo are:

Na₃N

Al₂O₃

AlCl₃

MgO

Chemical formulas are symbols and numbers used to represent the types and numbers of atoms of elements that make up a compound.

The chemical formula for a compound is determined by the type and number of atoms in the molecule.

For example, the chemical formula for water is H₂O, which indicates that it contains two hydrogen atoms (H) and one oxygen atom (O).

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Answer:

The answer is actually CO4

Explanation:

prove me wrong

Answer:

C2O4

Explanation:

Di means 2 and tetra means 4

A Grignard reagent will not directly add to the carbonyl carbon of a carboxylic acid. The reason is that carboxylic acids are acidic in nature and Grignard reagents are strong bases.

When a Grignard reagent comes into contact with a carboxylic acid, an acid-base reaction occurs rather than the desired nucleophilic addition to the carbonyl carbon.

In this acid-base reaction, the Grignard reagent deprotonates the carboxylic acid, forming a carboxylate anion and an alkane. This reaction effectively destroys the Grignard reagent before it has a chance to attack the carbonyl carbon.

To perform a nucleophilic addition to the carbonyl carbon of a carboxylic acid derivative, you would typically convert the carboxylic acid to a more suitable functional group, such as an ester or an acyl chloride, which are less acidic and more reactive towards Grignard reagents.

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Answer:

Stove → Pot = conduction, Pot → Egg = convection.

Explanation:

There are three ways in which heat is being transferred from one medium to the other and the means are; radiation, conduction and convection heat transfer.

Radiation is the process in which heat is being transferred through emission in form of electromagnetism. Conduction heat transfer Is the process in which heat is being transferred through contact that is two bodies touching each other. Convection heat transfer is the kind of heat that happens through gases.

Since the heat from the stove touching the pot is the conduction heat transfer.

After the water has been heated up, the gas from the water makes the convection heat transfer.

Answer:

Cardiovascular, respiratory and digestive

Explanation:

Answer:

boron

Explanation:

boron is a metaloid meaning it has the property of a metal and a non metal located where metals and non metals meet on the periodic table

Answer:

The answer is boron, the second answer is chlorine

Explanation:

edge 2022, have a great day h0mies

The given reaction is a functional group transformation as it involves the conversion of an aldehyde functional group into an alcohol functional group. The reagent that can accomplish this transformation is LiAlH4. The correct option is 4.

LiAlH4 is a powerful reducing agent that can reduce various functional groups including aldehydes, ketones, and esters to their corresponding alcohols. After the addition of LiAlH4, the reaction mixture is treated with H3O+ to complete the reaction. This step is called acid work-up, and it helps to remove any excess LiAlH4 and to convert the intermediate aluminum hydride species into a stable alcohol product.

In summary, the reaction can be accomplished by adding LiAlH4 followed by H3O+ (then acid work-up). LiAlH4 reduces the aldehyde functional group to an alcohol, and H3O+ helps to complete the reaction and obtain the desired alcohol product. It is important to note that LiAlH4 is a strong reducing agent and must be handled with care as it can react violently with water and air.

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The answer to the question is c. The library studies may yield a number of possible framework pieces to build into a good drug.                                                                                                                                                                                              

Modern drug discovery is a complex and time-consuming process that involves screening large libraries of compounds to identify potential candidates for further development. While the ultimate goal is to find a new drug that is effective against a specific disease or condition, it is often the case that the initial screening process yields multiple compounds that may be useful in developing a new drug.
This process is essential for addressing evolving health challenges and improving therapeutic options. While not every search guarantees a new candidate drug, the possibility of finding multiple framework pieces makes these studies valuable in drug discovery.

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Answer:

i dont know

Explanation:

Answer:

Silicon conducts electricity as well as copper does.

Explanation:

you didn't gave any statements to choose the answer from.

but otherwise, what all I my knowledge says that Silicon conducts electricity as well as copper does.

Answer:

iv it does not make but if im wrong dont report please!

Hi! I'd be happy to help with your question regarding sodium bicarbonate during a reaction workup. Sodium bicarbonate solution is often added during a reaction workup to neutralize any acidic impurities present in the organic layer, which in turn aids in their removal.

When sodium bicarbonate (NaHCO₃, aq) reacts with an acidic impurity, it forms water (H₂O, l), carbon dioxide (CO₂, g), and sodium salt of the corresponding acid (NaX, aq, where X is the anion of the acid). The overall reaction can be written as:

NaHCO₃ (aq) + HX (org) → NaX (aq) + H₂O (l) + CO₂ (g)

The products, water, and carbon dioxide, are formed in the aqueous phase, while the sodium salt (NaX) remains dissolved in the aqueous layer. This separation allows for the organic layer to be easily extracted, effectively removing acidic impurities from the reaction mixture.

To summarize:
1. Sodium bicarbonate is added to neutralize acidic impurities.
2. The reaction between sodium bicarbonate and an acidic impurity forms water, carbon dioxide, and sodium salt.
3. The products separate into different layers, allowing for the removal of impurities from the organic layer.

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The Cs+ ion forms the least strong ionic bond with any given anion. Ions with opposing charges are attracted to one another electrostatically to form ionic bonds, sometimes referred to as electrovalent bonds, in chemical molecules.

two ionic bonds When certain electrons are completely transported from one atom to another, ionic connections are formed. A negatively charged ion known as a cation is created when an atom loses one or more electrons. An anion, or negatively charged ion, is created when an atom accepts one or more electrons.

Significant Lessons. Ionic materials have high melting points. Ionic substances are stiff and brittle. An ionic substance splits into ions when it is dissolved in water.

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My friend is right because ice is a solid and all solids have their particles in fixed position.

There are three states of matter;

The particles of gases are extremely free and do not interact with each other. As a result of this, a gas does not have a definite shape or volume.

Liquids have a significant degree of intermolecular forces acting between their molecules hence they have a definite volume but no fixed shape.

Solids have a fixed shape and volume because solid particles are held in fixed positions by strong intermolecular interactions.

Ice is a solid, it has a fixed shape because the particles are held in fixed positions therefore they are not moving.

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The exact net benefit for the farmer (NPB) is: NPB = - (3/2)Q^2 - 6Q = -18

The exact net benefit for the neighbors is: Net Benefit for Neighbors = -TD = - (12Q + 2Q^2) = -80

1. If the mushroom farmer does not take the bad smell imposed on his neighbors into account, he will produce the quantity of mushrooms where his marginal cost equals his marginal revenue. To find this quantity, we equate the marginal cost (MC) to the marginal revenue (MR):

  MC = TPC' = 9 + 3Q

  MR = Qd = 21 - (1/5)P

  Setting MC = MR:

  9 + 3Q = 21 - (1/5)P

  Solving for Q, we get:

  Q = 4

  The Net Private Benefit (NPB) for the farmer is the difference between the total revenue (TR) and the total cost (TC):

  NPB = TR - TC = P * Q - TPC = PQ - (9Q + (3/2)Q^2) = - (3/2)Q^2 - 6Q

  The Net Social Benefit (NSB) for society is the difference between the total benefit (TB) and the total cost (TC):

  NSB = TB - TC = TD - TPC = (12Q + 2Q^2) - (9Q + (3/2)Q^2) = - (1/2)Q^2 + 3Q

2. The optimal number of units of mushrooms for society occurs where the social marginal benefit (SMB) equals the social marginal cost (SMC). To find this quantity, we equate the marginal benefit (MB) to the marginal cost (MC):

  MB = Qd = 21 - (1/5)P

  MC = TPC' = 9 + 3Q

  Setting MB = MC:

  21 - (1/5)P = 9 + 3Q

  Solving for Q, we get:

  Q = 4

  The NPB for the farmer at this optimal number is:

  NPB = - (3/2)Q^2 - 6Q = -18

  The NSB for society at this optimal number is:

  NSB = - (1/2)Q^2 + 3Q = 6

3. In a situation without transaction costs and a ruling that the farmer is not allowed to bother neighbors without their permission, the farmer will produce the quantity of mushrooms that maximizes his net private benefit (NPB). This occurs at the quantity where the marginal cost (MC) equals the marginal private benefit (MPB) for the farmer:

  MC = TPC' = 9 + 3Q

  MPB = Qd = 21 - (1/5)P

  Setting MC = MPB:

  9 + 3Q = 21 - (1/5)P

  Solving for Q, we get:

  Q = 4

  The exact net benefit for the farmer (NPB) is:

  NPB = - (3/2)Q^2 - 6Q = -18

  The exact net benefit for the neighbors is:

  Net Benefit for Neighbors = -TD = - (12Q + 2Q^2) = -80

4. In a situation without transaction costs and a ruling that the farmer is allowed to produce as much bad smell as he wants, the farmer will produce the quantity of mushrooms that maximizes his net private benefit (NPB). This occurs at the quantity where the marginal cost (MC) equals the marginal private benefit (MPB) for the farmer:

  MC = TPC' = 9 + 3Q

  MPB = Qd =

21 - (1/5)P

  Setting MC = MPB:

  9 + 3Q = 21 - (1/5)P

  Solving for Q, we get:

  Q = 4

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