Grade 12 organic chemistry

How would you name this?

Answer: 4848.22 mL

Explanation:

V2= P1V1T2/(T1 P2)  = (400.00 X 12.0 X 300.15)/(270.15 x 1.10)

The molarity of the 25 mL Ba(OH)₂ solution required to neutralize 18.45 mL  0.01500 M HCl solution is 0.005535 M.

The balanced chemical equation for the reaction between Ba(OH)2 and HCl is:

Ba(OH)2 + 2HCl -> BaCl2 + 2H2O

The moles of HCl used can be calculated as:

moles of HCl = concentration of HCl x volume of HCl

moles of HCl = 0.01500 M x 0.01845 L

moles of HCl = 0.00027675 mol

Since the stoichiometry of the reaction is 1:2 between Ba(OH)2 and HCl, the moles of Ba(OH)2 can be calculated as:

moles of Ba(OH)2 = 0.00027675 mol / 2

moles of Ba(OH)2 = 0.000138375 mol

The molarity of Ba(OH)2 can be calculated as:

molarity of Ba(OH)2 = moles of Ba(OH)2 / volume of Ba(OH)2

molarity of Ba(OH)2 = 0.000138375 mol / 0.02500 L

molarity of Ba(OH)2 = 0.005535 M

Therefore, the molarity of Ba(OH)2 is 0.005535 M.

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The elements which come after 'C' and 'Si' are 'Ge' and 'Sn'. The element 'F' is the most electronegative element. Down the group the electronegativity generally decreases.

The electronegativity of an atom is defined as the relative tendency or power of the bonded atom in a molecule to attract the shared pair of electrons towards itself.

In general the electronegativity decreases on moving down a group. The increase in the size of atoms and the shielding effect of inner electrons decreases the electronegativity.

Here 'Ge' and 'Sn' comes below 'C' and 'Si'.

Thus the electronegativity of the elements after 'C' and 'Si' decreases.

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Camouflage is not a general adaptation which is therefore denoted as option A.

This is referred to as any heritable trait that helps an organism, such as a plant or animal, survive and reproduce in its environment.

It is also called cryptic coloration, is a defense or tactic that organisms use to disguise their appearance, usually to blend in with their surroundings. Organisms use camouflage to mask their location, identity, and movement and it used by most prey to avoid predators, and for predators to sneak up on prey.

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The mechanism which is put forward by Darwin for the evolution is called the natural selection. It is also sometimes defined as the ecological selection.

According to Darwin's theory of natural selection the individuals with adaptive traits, that is the traits which give them some advantage are more likely to survive and reproduce. These individuals then pass the adaptive traits to produce new offspring.

Darwin found two types of tortoise in the Galapagos island. The saddle back tortoises had shells that rise in front like a saddle. This adaptation makes them easier to live in area of low vegetation whereas Dome shaped tortoise lived in abundance of vegetation.

Similarly he noticed difference in the shape and size of beaks. Large billed finches feed on large seeds whereas small billed finches feed on soft seeds.

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The concept that we are made up of atoms is fascinating and scientifically supported.

Scientists study atoms and molecules with various instruments, and several new advances in chemistry have helped to improve the environment by developing more sustainable and efficient technologies.

The idea that everything in the universe, including living beings like us, is made up of atoms is not only fascinating, but it is also supported by several basic chemistry laws.

According to the law of definite proportions, a given compound always contains the same proportion of elements by mass, regardless of its source or method of preparation. This law implies that the elements that comprise living beings, such as carbon, nitrogen, oxygen, and hydrogen, exist in specific proportions that govern their biological functions and properties.

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the complete question is:

Do you find the concept of being made of atoms disturbing? What is your reasoning? When answering the question, include various chemistry laws to back up your point of view, as well as what type of instruments scientists use to study atoms and what new advances have improved the environment.

Primary succession and secondary succession are similar in that they are both gradual processes and involve the creation of soil.

What is Primary succession and secondary succession?

Primary succession occurs in an area where no soil or living organisms are present, such as on bare rock or after a volcanic eruption. Over time, pioneer species like lichens and mosses establish themselves, eventually leading to the growth of small plants, shrubs, and trees. As these organisms die and decompose, they create soil, which allows for the growth of larger and more complex organisms. This process can take hundreds or even thousands of years.

Secondary succession, on the other hand, occurs in an area where soil and some living organisms are already present, but the community has been disturbed or destroyed, such as after a forest fire, a landslide, or human activity like clear-cutting or farming. The process begins with the growth of fast-growing and weedy species that quickly colonize the area, followed by the establishment of more complex and longer-lived species. Secondary succession is generally faster than primary succession because soil and some organisms are already present.

Primary succession and secondary succession are similar in that they are both gradual processes and involve the creation of soil.

However, they differ in terms of the starting point of the succession. Primary succession begins on bare rock or soil that has never been colonized by living organisms, while secondary succession begins on soil that has previously supported life but has been disturbed, such as after a forest fire or clear-cutting.

Therefore, the statement "Both occur where no life exists" is only true for primary succession, while "Both occur where life already exists" is only true for secondary succession.

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The substance that each property describes are - feels slippery - only base; tastes sour - only acid; conducts electricity - both acid and base

The three properties listed are common characteristics of acids and bases, but they can be used to identify which substance is an acid, which is a base, or which substance has both acidic and basic properties.

Feels slippery: This is a property of bases. When a substance feels slippery, it means that it is producing hydroxide ions (OH-) in water, which react with the skin to create a slippery sensation. So, a substance that feels slippery is a base.

Tastes sour: This is a property of acids. When a substance tastes sour, it means that it is producing hydrogen ions (H+) in water, which react with taste buds to create a sour taste. So, a substance that tastes sour is an acid.

Conducts electricity: Both acids and bases can conduct electricity, but it depends on whether they are in aqueous solution or molten form. In an aqueous solution, both acids and bases dissociate into ions and can conduct electricity. However, in the molten state, only bases can conduct electricity. Therefore, if a substance can conduct electricity in an aqueous solution or molten state, it can be either an acid or a base or both.

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Correct form of question would be

Identify the substance that each property describes.

only acid

only base

both acid and base

feels slippery

tastes sour

conducts electricity

A consumer is known as a person who purchases the product for his or her own need and uses that product. Here Falling prices lead consumers to purchase more kayaks. The correct option is B.

The general decrease in the price of products as well as in the economy is defined as the fall in price. The falling prices occur for many reasons including supply and demand factors.

A decrease in demand and an increase in supply will cause a fall in equilibrium price, but the effect on equilibrium quantity cannot be determined.

Thus the correct option is B.

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If two atoms of oxygen have different numbers of neutrons then the mass  of the two atoms will be different.

Mass number is the sum of the numbers of protons and neutrons present in the nucleus of an atom.

The mass number is commonly used in distinguishing among the isotopes of an element, all of which have the same atomic number (number of protons) and are represented by the same symbol

Mass number depends on the number of neutrons and protons present in the nucleus and determines how heavy the nucleus is. Therefore, if similar atoms have different number of neutrons then their masses will be different.

Therefore, If two atoms of oxygen have different numbers of neutrons then the mass  of the two atoms will be different.

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Explanation:

Refer to pic...........

.

In Question 4, Jasmine calculated the amount of energy absorbed by the water when the burning Cheeto was placed in it. Although the calculation related only to the water, we can still determine the amount of energy released by the burning Cheeto. This is because of the Law of Conservation of Energy, which states that energy cannot be created or destroyed, only transferred or transformed from one form to another. In this case, the energy released by the burning Cheeto is transferred to the water, causing its temperature to increase.

Therefore, we can use the amount of energy absorbed by the water (calculated in Question 4) as a measure of the amount of energy released by the burning Cheeto. We can assume that the energy released by the Cheeto is equal to the energy absorbed by the water. This is known as the principle of calorimetry, which states that the heat lost by the object being studied is equal to the heat gained by the surrounding medium.

However, it is important to note that this assumption is only valid if all the energy released by the Cheeto is transferred to the water. In reality, some energy may be lost to the surroundings, such as through radiation or conduction. Therefore, the calculated value for the energy released by the Cheeto may be slightly lower than the actual value.

There are 5 mol of CaSO3 were left after the water was driven off.

The molar mass is the substance; it helps to determine the mass of the sample substance to the atom of the sample or substance. The molar mass depends on the molecular formula and the isotopes of the atom. Molar mass is used for the inducement of electric charge. Molar mass is the measurement of the volume of the mass.

A mole is the atom's elementary particle, an ion. The mole of the substance is always related to the Avogadro number. The mole is always associated with the weight or mass of the element or substance. The standard unit of a mole is mol. The mole is a significant factor of the reactant and products to form an equation. A mole calculates the atom, ion, and substance weighs.

Therefore,  are 5 mol of CaSO3 were left after the water was driven off.

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Three is no change in the blue litmus but the red litmus change color. This is because the ammonia turns red litmus blue due to ammonia.

When ammonium chloride and sodium hydroxide are mixed, they undergo a neutralization reaction to form ammonium hydroxide and sodium chloride. The chemical equation for this reaction is:

NH4Cl + NaOH → NH4OH + NaCl

In this equation, NH4Cl represents ammonium chloride, NaOH represents sodium hydroxide, NH4OH represents ammonium hydroxide, and NaCl represents sodium chloride.

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The arrangement of its atoms or molecules best explains many physical properties of a material.

What is Metal?

A metal is a type of material that is typically hard, shiny, malleable, ductile, and has good electrical and thermal conductivity. Metals are characterized by their ability to form cations, which are positively charged ions, by losing electrons. They typically have metallic bonds, which are formed when the outermost electrons of metal atoms are delocalized and shared among a lattice of metal ions. This results in metals having a unique set of physical and chemical properties, such as high melting and boiling points, high density, and good strength-to-weight ratios, making them useful for a wide range of applications, including construction, transportation, electronics, and manufacturing.

Many physical properties of a material can be explained by its atomic and molecular structure. The arrangement of atoms and molecules in a material determines its physical properties such as density, melting and boiling points, thermal conductivity, electrical conductivity, and more. For example, a material with a tightly packed atomic arrangement will be denser than a material with a more open arrangement. Similarly, the strength of the bonds between atoms and molecules will determine how much energy is required to melt or boil the material.

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The variables which when taken together will result in the highest pressure are increased temperature and number of moles.

Variables are defined as any characteristics, number or quantity which can be measured . It can also be called as a data item . It is called as variable because they can vary and can have variety of values.

There are three types of variables 1) manipulated variable where in a condition is specified, 2) responding variable which is dependent on manipulated variable 3)controlled variable which do not change

Example of manipulated variables are number of hours spent by a student studying , that of responding variable is result of a student and temperature is an example of controlled variable.

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This principle is important in laboratory reports because it can be used to determine an object's or material's density, which is an important physical property used in many applications.

The Archimedes' principle is a fundamental physics principle that states that the buoyant force acting on an object submerged in a fluid equals the weight of the fluid displaced by the object. It is critical to use the Archimedes' principle in a lab report to accurately and precisely determine the density of the object or material being studied. This principle provides a dependable and accurate method for calculating density, which is useful in many scientific and engineering fields. By including the Archimedes' principle in a lab report, you show that you considered all relevant factors and used appropriate methods to determine the physical properties of the materials being studied.

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Answer: 1. is 70 minutes

2. is 195

Explanation: I took the test and I got a B but for sure it's this

It would take Mr. Bryan's pet turtle 70 minutes to walk 280 feet at a speed of 4 feet per minute.

To calculate the time it takes for Mr. Bryan's pet turtle to walk 280 feet at a speed of 4 feet per minute, we can use the formula:

time = distance / speed

Plugging in the given values, we get:

time = 280 feet / 4 ft/min = 70 minutes

Therefore, it would take Mr. Bryan's pet turtle 70 minutes to walk 280 feet at a speed of 4 feet per minute.

The second one is:

According to the given data:

distance = speed x time

where speed is given as 65 miles per hour (mph) and time is given as 3 hours.

Plugging in these values, we get:

distance = 65 mph x 3 hours = 195 miles

Therefore, San Antonio is 195 miles away from Adrian's mom.

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The efficiency of this power plant that combusts methane to produce electricity is 4.8%.

Given the area of methane = 37,500,000 cubic yards

The power of electricity = 61,626,000 kWh

It is given that the power plant combusts methane to produce electricity.

We know that the efficiency of power is equal to the electricity generated divided by the energy used for combustion.

1 yard^3 = 27ft^3

37,500,000 cubic yards x 27 = 1,012,500,000 cubic feet

Efficiency = energy output/energy input

Efficiency = (61,626,000 kWh) / 1,012,500,000 cubic feet

Here, BTU is the common unit of energy so,

1,012,500,000 cubic feet of methane = 5,072,500,000,000 Joules where 1 Joule = 0.0009478 BTU

5,072,500,000,000 Joules x 0.0009478 = 4,787,039,500,000 BTU

We know that 1 kWh = 3412 BTU then,

61,626,000 kWh = 61,626,000 *  3412 BTU = 210,343,312,000 BTU

efficiency = 210,343,312,000 BTU / 4,787,039,500,000 BTU = 0.0438%

Efficiency = 4.38%

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Explanation:

Refer to pic..........

The correct option is D) mole ratio of any 2 substances in the reaction.

A balanced chemical equation describes the identities and quantities of the reactants and products involved in a chemical reaction. It specifies the number of molecules or moles of each substance required and produced in the reaction.

                   The coefficients can determine the mole ratio of any two substances involved in the reaction in a balanced equation. This information is critical for predicting how much product can be obtained from a given amount of reactant or determining the limiting reactant in a reaction.

                    Knowing the mole ratio also allows for precise stoichiometric calculations, which can be used in various chemical applications such as synthesis, chemical analysis, and industrial processes.

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The volume of 3M from making stock solution is 7.5 liters.

To make a 3M solution from a 6M stock solution of AgNO3, we need to add water to the stock solution. Let us assume x liters of 3M solution from 5 liters of the 6M stock solution.

The amount of AgNO3 in the 5 liters of the stock solution is:

5 L * 6 mol/L = 30 mol AgNO3

To make a 3M solution, we need:

3 mol/L * x L = 3x mol AgNO3

We can use the formula:

C1V1 = C2V2

where,

C1 = concentration of the stock solution

C2 = concentration of the final solution

V1 = volume of stock solution

V2 = volume of the final solution

In this case, we know that:

C1 = 6 M

C2 = 3 M

V1 = x

V2 = 5 L + x

In this case, we know that:

C1 = 6 M

C2 = 3 M

V1 = x

V2 = 5 L + x

let us substitute the above values in the formula

6 M * V1 = 3 M * (5 L + x)

Solving for x, we get:

x = 2.5 L

Therefore, to make a 3M solution from a 6M stock solution, a final volume of 5 + 2.5 = 7.5 liters to get a 3M solution.

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Calcium Hydroxide is created when calcium combines with water, or Ca2+. Water plus Ca results in Ca(OH)2.

Due to the heat created by the reaction, the calcium begins to float.

Although it additionally plays a critical role in haemostasis, assisting in muscular contraction, controlling regular heart rhythms, and maintaining normal neural activities, calcium is a substance that is most frequently linked to strong bones and teeth.

Little, if any, negative effects are brought on by calcium supplementation. Gas, constipation, and bloating are examples of adverse symptoms that might occasionally happen. The most constipating substance is typically calcium carbonate. Finding a calcium supplement that you tolerate the best may need you to test a few various brands or varieties.

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The volume of a piece of molecular cloud that has the same amount of water as your body is [tex]1.6 * 10^31 cm^3.[/tex]

It is said that the water molecules in our body are a part of molecular cloud and its mass density = [tex]3.5*10^{-21} g/cm^3[/tex]

Let the Mass of Water in Body = Mb

We want to find the volume of a piece of molecular cloud(vcloud) with the same amount of water as the body.

We know that the mass of any object is equal to the product of its volume and density.

Therefore, Mb = vcloud x ρcloud

Given that Mb is equal to the mass of water in a person's body (which can be estimated at between 40-70 kg).

It is given that only one millionth of the mass of a molecular cloud is in the form of water molecules.

Then vcloud = [tex](40 * 10^3g) * 10^6/(3.5*10^{-21} g/cm^3)[/tex]

vcloud =[tex]1.6 * 10^{31} cm^3[/tex]

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complete question: The water molecules now in your body were once part of a molecular cloud. Only about one millionth of the mass of a molecular cloud is in the form of water molecules, and the mass density of such a cloud is roughly 3.5×10^−21 g/cm3

Estimate the volume of a piece of molecular cloud that has the same amount of water as your body.

a.) vcloud= 1. 6×10^29 cm3

b.) vcloud= 1. 6×10^31 cm3

c.) vcloud= 1. 6×10^33 cm3

d.) vcloud= 1. 6×10^35 cm3

The starting material can be shown by the image in image B

A chemical reaction is a process that involves the conversion of one or more substances (called reactants) into new substances (called products) through the breaking and forming of chemical bonds. In a chemical reaction, the original chemical properties of the reactants are changed, resulting in the formation of one or more new substances with different properties.

Chemical reactions can involve the combination of two or more substances to form a single product, the decomposition of a single substance into two or more products, or the exchange of atoms or groups of atoms between reactants to form new products.

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Radioactive dating measures the ratio of C¹²(normal) and C¹⁴ (radioactive) in fossils to determine the exact age of the specimen. C¹⁴ is unstable and has a half life of 5730 years.

The organism ages the amount of C¹⁴ diminishes but the amount of C¹² remains constant. The ratio of C¹⁴ to C¹² is used to analyze the decay of atomic particles to determine exact age.

Relative dating uses rock layers and index fossils to determine an object's estimated age. Relative dating is a method of dating archaeological structures or discoveries based on how they are temporally or formally compared to others. This is in contrast to absolute dating, where the material itself dates.

Therefore, Relative dating can be done by stratigraphic dating, typology or climatic dating.

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Answer:

products.

Explanation:

Answer:

Explanation:

Chromosomal abnormalities can also cause miscarriage, disease, or problems in growth or development. - hope this helped <3

The percent yield of carbon dioxide if the 3.65 g of the gas is collected when the 10.0 g marble reacts is react with the HCl is 83 %.

The chemical reaction is as follows :

CaCO₃ (aq)  +  2HCl (aq) ----> CaCl₂ (aq)  + H₂O (l) + CO₂(g)

The mass of the CaCO₃  = 10 g

The molar mass of the CaCO₃  = 100.09 g/mol

The moles of the CaCO₃  = 10 / 100.09

The moles of the CaCO₃  = 0.0999 mol

The molar ratio of the carbon dioxide and the calcium carbonate = 1 : 1

The moles of the carbon dioxide = 0.0999 mol

The mass of the carbon dioxide = moles × molar mass

The mass of the carbon dioxide = 0.0999 × 44

The mass of the carbon dioxide = 4.40 g

The percent yield = ( actual yield / theoretical yield ) × 100 %

The percent yield = ( 3.65 / 4.40 ) × 100 %

The percent yield = 83 %

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Answer:

B is the false one

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