both low explosives and high explosives will typically create a crater in the spot where the bomb detonates. true or false

Answer:

43.2 moles of carbon dioxide are required and 421g of glucose could be produced

Explanation:

Based on the reaction:

6CO2 + 6H2O → C6H12O6 + 6O2

1 mole of glucose, C6H12O6, requires 6 moles of carbon dioxide. 7.2moles of glucose requires:

7.2mol C6H12O6 * (6mol CO2 / 1mol C6H12O6) =

618g of CO2 -Molar mass: 44.01g/mol- are:

618g * (1mol / 44.01g) = 14.04moles CO2

Moles C6H12O6:

14.04moles CO2 * (1mol C6H12O6 / 6mol CO2) = 2.34moles C6H12O6

Mass glucose -Molar mass: 180.156g/mol-

2.34moles C6H12O6 * (180.156g / mol) =

The compounds that exhibit hydrogen bonding forces are a. HF and f. NH₃.

Hydrogen bonding is a type of chemical bonding that occurs between a hydrogen atom covalently bonded to an electronegative atom (such as nitrogen, oxygen, or fluorine) and another electronegative atom in a different molecule or region of the same molecule.

In HF, the hydrogen is bonded to fluorine, and in NH₃, the hydrogen is bonded to nitrogen. Both of these compounds exhibit hydrogen bonding forces.

The other compounds listed, XeF₄, SO₂, CH₄, and BrF₃, do not have hydrogen atoms bonded to highly electronegative atoms, so they do not exhibit hydrogen bonding forces.

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Arsenic, hydraulic fracturing, lead, and PFAS present chemical threats to global drinking water supplies in different ways.

Let's discuss each of them in detail:

(a) Arsenic - The origin of arsenic exposure is natural deposits or contamination from agricultural or industrial practices. Human health consequences include skin, lung, liver, and bladder cancers. It can also lead to cardiovascular diseases, skin lesions, and neurodevelopmental effects. Drivers of continued exposure include poor regulation and monitoring. Modern solutions include rainwater harvesting and treatment.

(b) Hydraulic fracturing - Hydraulic fracturing involves using a mixture of chemicals, water, and sand to extract natural gas and oil from shale rock formations. The origin of exposure is contaminated surface and groundwater due to the release of chemicals from fracking fluids and other sources. Human health consequences include skin, eye, and respiratory irritation, headaches, dizziness, and reproductive and developmental problems. Drivers of continued exposure include lack of regulation and poor oversight. Modern solutions include alternative energy sources and regulation of the industry.

(c) Lead - Lead contamination in drinking water can occur due to corrosion of plumbing materials. Human health consequences include neurological damage, developmental delays, anemia, and hypertension. Drivers of continued exposure include aging infrastructure and poor maintenance. Modern solutions include replacing lead service lines, testing for lead levels, and implementing corrosion control.

(d) PFAS - PFAS (per- and polyfluoroalkyl substances) are human-made chemicals used in a variety of consumer and industrial products. They can enter the water supply through wastewater discharges, firefighting foams, and other sources. Human health consequences include developmental effects, immune system damage, cancer, and thyroid hormone disruption. Drivers of continued exposure include the continued use of PFAS in consumer and industrial products. Modern solutions include reducing the use of PFAS in products and treatment methods such as granular activated carbon.

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Answer: 10.3 grams of Copper oxide is left unreacted.

Explanation:

To calculate the moles :

\(\text{Moles of solute}=\frac{\text{given mass}}{\text{Molar Mass}}\)    

\(\text{Moles of} CuO=\frac{50g}{79.5g}=0.63moles\)

The balanced chemical reaction is:

\(CuO+H_2SO_4\rightarrow CuSO_4+H_2O\)  

According to stoichiometry :

1 moles of \(H_2SO_4\) require = 1 mole of \(CuO\)

Thus 0.5 moles of \(H_2SO_4\) will require=\(\frac{1}{1}\times 0.5=0.5moles\)  of \(CuO\)

Thus \(H_2SO_4\) is the limiting reagent as it limits the formation of product and \(CuO\) is the excess reagent.

moles of CuO left = (0.63-0.5) mol= 0.13 mol

Mass of \(CuO\) left =\(moles\times {\text {Molar mass}}=0.13moles\times 79.5g/mol=10.3g\)

10.3 grams of Copper oxide is left unreacted.

The ocean where prevailing winds pass through is the Pacific Ocean.

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Answer:

Explanation:

Gravitational force

Answer:

1 gravity

2 magnetism

3 static electricity

Explanation:

Answer:

Democritus

Explanation:

Democritus first introduced the idea of the atom almost 2500 years ago. Democritus was an important philosopher however if your talking about how the atom is today look at first rudimentary   pudding model by JJ Thomson first design then its Neils  Bohr whos model we look at today

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3. Conducts electricity in aqueous solution.

The immediate source of the colored light produced by neon signs is the excitation of the neon atoms.

According to the Bohr theory, when energy is supplied to an atom, the electrons in the atom become excited and move from a lower to a higher energy level. The source of energy that causes excitation may be heat, electric discharge, etc.

As the excited atoms return to ground state, they emit energy in the form of visible light corresponding to a particular wavelength.

The source of the colored light produced by neon signs is the transition of neon atoms from higher to a lower energy level.

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Answer:

2.691*10^6 g

Explanation:

A lot of energy is required to overcome these forces and melt or vaporize the alkane

The melting point and boiling point of alkanes (a type of hydrocarbon with only single bonds between the carbon atoms) generally increase as the number of carbon atoms in the molecule increases. This is because the larger the molecule, the more Van der Waals forces (also known as London dispersion forces) that are present. These forces are a type of weak attractive force that can exist between any two molecules and are caused by the fluctuating dipoles (temporary separations of positive and negative charge) that occur within a molecule. The more carbon atoms a molecule has, the more fluctuating dipoles it has, and the stronger the Van der Waals forces are. As a result, more energy is required to overcome these forces and melt or vaporize the substance.

In addition to the size of the molecule, the type of bond present in the molecule can also affect the melting point and boiling point. Single bonds, like those found in alkanes, are weaker than double bonds or triple bonds. As a result, molecules with double or triple bonds have higher melting points and boiling points than molecules with the same number of carbon atoms but only single bonds.

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Answer:

D

Explanation:

Solvent is the material that is dissolving another material​. Thus, option D is correct.

A solvent is a substance that dissolves another substance to form a solution. The substance that is being dissolved is called the solute, and the substance that is doing the dissolving is called the solvent. The solute is usually present in a smaller amount than the solvent, and it is the solvent that determines the physical properties of the solution, such as its density, viscosity, and boiling point.

For example, when salt is dissolved in water, the salt is the solute and the water is the solvent. The water molecules surround the salt molecules and break them apart, so that the salt ions are free to move around in the solution. The solution is then a homogeneous mixture of salt ions and water molecules.

Thus, option D is correct.

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By dividing water, the electron that was lost from the chlorophyll special pair is replaced. Protons are pumped from the stroma to the thylakoid lumen as a result of the electron passing through the first link in the electron transport chain.

The electrons from photosystem II that have traveled via the electron transport chain replace the electrons lost by these chlorophyll molecules. The two chlorophyll "a" molecules of photosystem II are compelled by light energy to go up an energy level.

The energy storage molecule ATP and the reduced electron carrier NADPH are produced by the light-dependent processes using light energy, which is required for the subsequent stage of photosynthesis. Light reactions in plants occur in the thylakoid membranes of organelles referred to as chloroplasts in chlorophyll.

The light reactions are largely controlled by photosystems, sizable complexes of proteins, and pigments (light-absorbing molecules) that are designed to capture light. Photosystem I (PSI) and Photosystem II are the two different types of photosystems (PSII). Via a process known as photolysis, the chlorophyll molecule regains the lost electron from a water molecule, releasing dioxygen (O2) in the process.

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Answer:

whole milk ,table salt , maple syrup

Answer:

d

Explanation:

The numerical value of the Ksp  of \(BaSO_{4}\) is 1.69 * 10^-20.

The Ksp is an equilibrium constant that shows the extent to which a substance is soluble in water. Now consider the fact that \(BaSO_{4}\) is almost insoluble in water.

i) The Ksp of the \(BaSO_{4}\) solution can be obtained from the relation;

Ksp = [\(Ba^{2+}\)] [\(SO_{4}^{2-}\)]

ii) The numerical value of the Ksp is obtained from; [1.30 × 10–10]^2 = 1.69 * 10^-20

iii) The reason for the toxicity of \(BaCO_{3}\) even though it is not more soluble that barium sulfate is that \(BaCO_{3}\) can dissolve in the gastrointestinal tract which is acidic leading to barium poisoning.

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In the polymerization reaction, the lone pair electrons on the NH₂ groups of hexanediamine attack the C=O groups of the dicarboxylic acid in a nucleophilic substitution reaction as shown in the image.

Hydroxide is added to remove any H⁺ ions present and keep the hexanediamine in the deprotonated form, so that the NH₂ lone pair electrons are available for reaction.

If hydroxide is not added, the NH₂ groups will get protonated by H⁺  ions present to give NH₃⁺ groups, which cannot react.

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Answer:

Later when they are older

Explanation:

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Sister chromatids is the term for the chromosomes that are identical after DNA replication.

Sister chromatids are identical chromosomes that are created during the process of DNA replication. DNA replication is the process where a DNA strand is copied, creating a new strand. During this process, each chromosome is split in half, forming two identical halves.

These halves are known as sister chromatids and are held together by a centromere. Sister chromatids are attached to one another during the interphase stage of the cell cycle and are separated during the metaphase stage of the cell cycle.

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Answer:

Nonmetal elements

Explanation:

Elements combine to form chemical compounds that are often divided into two categories. Metals often react with nonmetals to form ionic compounds.

The process that will likely result in a precipitation reaction is (b) mixing a BaCl2 solution with a K2SO4 solution.

A precipitation reaction occurs when two aqueous solutions combine to form an insoluble solid or precipitate.

The balanced ionic equation for this precipitation reaction is:

Ba2+ (aq) + SO42- (aq) → BaSO4 (s)K+ (aq) + Cl- (aq) → KCl (aq)

The net ionic equation for this precipitation reaction is:

Ba2+ (aq) + SO42- (aq) → BaSO4 (s)

The net ionic equation only includes the ions that take part in the reaction. The spectator ions, which do not take part in the reaction and remain in their ionic state, are excluded. In this case, K+ and Cl- are spectator ions.

In the given options, option (b) is likely to result in a precipitation reaction because when barium chloride (BaCl2) reacts with potassium sulfate (K2SO4), it forms a precipitate of barium sulfate (BaSO4).

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Answer:

b) a rubber tire

Explanation:

Answer: B - a rubber tire

Explanation: Rubber is an insulator

The mass number of an atom of potassium that has 20 neutrons is option C. 39

Mass number-

Mass number is the total number of protons and neutrons in the nucleus of an atom is called the mass number. It is represented by the symbol A. In other words, mass number refers to the sum of the number of protons and neutrons in the nucleus of an atom.

Atom-

Atoms are tiny particles that make up everything in the world. Everything in the world is made up of tiny particles known as atoms. An atom is the basic unit of matter. The term "atom" comes from the Greek word atomos, which means indivisible.

The basic building blocks of all matter are atoms, which are made up of three types of particles: protons, neutrons, and electrons.

In a neutral atom, the number of electrons is equal to the number of protons, thus the overall charge on the atom is zero. However, the mass number of the atom is equal to the sum of the number of protons and neutrons.

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Answer:

10 electrons

Explanation:

Answer:

the wave model of light is useful for explaining brightness, color, and the frequency-dependent bending of light at a surface between media. For example, students could observe some of the wave behaviors or light by observing that when light passes through a small opening the waves spread out. They could observe that if the wavelength is short, the waves spread out very little, whereas longer wavelengths spread out more

Explanation:

Metallic Minerals will be minerals in which metal components are available in their crude structure. Non-metallic minerals don't contain any metal substances in them. At the point when metallic minerals are dissolved another item is shaped. Non-metallic minerals are frequently discovered installed in youthful overlay mountains and sedimentary rocks.

The structure of the alkyl bromides used in a malonic ester synthesis of ethyl 2-methyl-4-pentenoate are as drawn in the attached image.

The malonic ester synthesis is a chemical reaction characterized by the alkylation of diethyl malonate or a similar ester of malonic acid at the carbon alpha (directly adjacent) to both carbonyl groups, and subsequently converted to a substituted acetic acid.

Hence, it follows from the structure of Ethyl 2-methyl-4-pentenoate that the alkyl bromides used are Ethyl bromide and methyl bromide.

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The structure of alkyl bromide that would be used in a malonic ester synthesis of ethyl 2-methyl-4-pentenoate are ethyl bromide and methyl bromide.

When halogens such as Br, Cl, I, attched to the sp3 carbon atom of alkyl group, they called alkyl halides.

Here, bromide is attached to an alkyl group.

Ethyl bromide and methyl bromide are the alkyl halides used in synthesis of ethyl 2-methyl-4-pentenoate

Thus, ethyl bromide and methyl bromide are the alkyl bromides.

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Answer:

413000

Explanation:

you multiply it by a thousand

413 x 1000