Gen Chem 2 need help!

Answer:

21 gam

Explanation:

mH2SO4 = mddH2SO4.C% = 150. 14% = 21g

The most likely cause of earthquakes that occur in the area shown on the map is due to fault lines in the earth's crust.

Earthquakes are natural phenomena characterized by the shaking or trembling of the Earth's surface.

They occur due to the sudden release of energy in the Earth's crust along fault lines, which creates seismic waves that propagate through the Earth.

The Earth's crust is composed of several large tectonic plates that float on the semi-fluid layer of the Earth's mantle.

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The moderately reactive atoms located in the periodic table is fluorine, chlorine, bromine, and iodine which means the  halogens family.

They are the five non-metals in family 7A of the periodic table. Halogens are chemical elements that form inorganic salts. In the periodic table they are part of group 17 or family 7A.

Halogens are strong oxidants and react mainly with alkali metals (Family I A) which tend to donate an electron. They also react with metals and noble gases (Family VIII A).

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Answer:

boy you should email your teacher they will help you with this you need to pay attention and do your work

The removal of the alcohol seen in the conversion of the nasal decongestant pseudoephedrine to the illicit drug methamphetamine constitutes the type of reduction process.

Redox is a type of chemical reaction in which the oxidation state of the substrate changes. Oxidation generally can be defined as the loss of electrons or increase in the oxidation state, while reduction is the gain of electrons or decrease in the oxidation state. The removal of alcohol observed in the conversion of pseudoephedrine to the illicit drug methamphetamine constitutes a reduction process. The "red phosphorus method" is a chemical reduction reaction that converts pseudoephedrine to methamphetamine using red phosphorus/hydrogen iodide oxidation chemistry.

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Answer:

2 Answers. Most transition metals have 2 valence electrons. Valence electrons are the sum total of all the electrons in the highest energy level (principal quantum number n). Most transition metals have an electron configuration that is ns2(n−1)d , so those ns2 electrons are the valence electrons.

Explanation:

Answer:

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Answer:

Explanation:

All compounds are molecules, but not all molecules are compounds. That is because a molecule can be made up of two atoms of the same kind, as when two oxygen atoms bind together to make an oxygen molecule. However, all compounds are made up of two or more different types of atoms.

Answer:

the last one

Explanation:

Answer:

9

Explanation:

7 is neutral anything higher than 7 is a base anything lower than 7 is an acid.

Answer:

There are many factors that influence the reaction rates of chemical reactions include the concentration of reactants, temperature, the physical state of reactants and their dispersion, the solvent, and the presence of a catalyst

Explanation:

According to the stoichiometry of the given chemical equation, the mass of solid product formed that is CuO  is 28.97 g.

It is the determination of proportions of elements or compounds in a chemical reaction. The related relations are based on law of conservation of mass and law of combining weights and volumes.

Stoichiometry is used in quantitative analysis for measuring concentrations of substances present in the sample.

123.55 g copper carbonate gives 79.54 g copper oxide thus, 45 g copper carbonate will give 45×79.54/123.55=28.97 g.

Thus,  the mass of solid product formed that is CuO  is 28.97 g.

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The standard emf of a galvanic cell made of a Ni electrode in a 1.0 M Ni(NO₃)₂ solution and a Cr electrode in a 1.0 M Cr(NO₃)₂ solution at 25 °C is 0.51 V.

the reduction potential of Ni²⁺ = - 0.23

the reduction potential of Cr³⁺ = - 0.74

the reduction potential of the Ni²⁺ is higher than the reduction potential of Cr³⁺. that mean  Ni²⁺ undergoes the reduction.

the standard emf cell expression is given as follows :

the standard emf cell , E = E Ni²⁺/Ni - E  Cr³⁺ / Cr

                                         = - 0.23 - ( - 0.74 )

                                         = - 0.23 + 0.74

                                         = 0.51 V

Thus, The standard emf of cell is 0.51 V.

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Nanomaterials, whether natural, engineered, organic, or inorganic, offer various applications across industries. However, their environmental health and safety impacts need to be carefully evaluated and managed to mitigate any potential risks.

Understanding their properties, fate, and behavior in different environments is crucial for responsible development, use, and disposal of nanomaterials.

Natural Nanomaterials:

Examples: Carbon nanotubes (CNTs) derived from natural sources like bamboo or cotton, silver nanoparticles in natural colloids, clay minerals (e.g., montmorillonite), iron oxide nanoparticles found in magnetite.

Uses: Natural nanomaterials have various applications in medicine, electronics, water treatment, energy storage, and environmental remediation.

Environmental health and safety impacts: The environmental impacts of natural nanomaterials can vary depending on their specific properties and applications. Concerns may arise regarding their potential toxicity, persistence in the environment, and possible accumulation in organisms. Proper disposal and regulation of their use are essential to minimize any adverse effects.

Engineered Nanomaterials:

Examples: Gold nanoparticles, quantum dots, titanium dioxide nanoparticles, carbon nanomaterials (e.g., graphene), silica nanoparticles.

Uses: Engineered nanomaterials have widespread applications in electronics, cosmetics, catalysis, energy storage, drug delivery systems, and sensors.

Environmental health and safety impacts: Engineered nanomaterials may pose potential risks to human health and the environment. Their small size and unique properties can lead to increased toxicity, bioaccumulation, and potential ecological disruptions. Safe handling, proper waste management, and risk assessment are necessary to mitigate any adverse effects.

Organic Nanomaterials:

Examples: Nanocellulose, dendrimers, liposomes, organic nanoparticles (e.g., polymeric nanoparticles), nanotubes made of organic polymers.

Uses: Organic nanomaterials find applications in drug delivery, tissue engineering, electronics, flexible displays, sensors, and optoelectronics.

Environmental health and safety impacts: The environmental impact of organic nanomaterials is still under investigation. Depending on their composition and properties, they may exhibit varying levels of biocompatibility and potential toxicity. Assessments of their environmental fate, exposure routes, and potential hazards are crucial for ensuring their safe use and minimizing any adverse effects.

Inorganic Nanomaterials:

Examples: Quantum dots (e.g., cadmium selenide), metal oxide nanoparticles (e.g., titanium dioxide), silver nanoparticles, magnetic nanoparticles (e.g., iron oxide), nanoscale zeolites.

Uses: Inorganic nanomaterials are utilized in electronics, catalysis, solar cells, water treatment, imaging, and antimicrobial applications.

Environmental health and safety impacts: Inorganic nanomaterials may have environmental impacts related to their potential toxicity, persistence, and release into ecosystems. Their interactions with living organisms and ecosystems require careful assessment to ensure their safe use and minimize any negative effects.

Understanding their properties, fate, and behavior in different environments is crucial for responsible development, use, and disposal of nanomaterials.

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Answer:

√K = [.08-2x]/[.1+x]

Explanation:

As instructed by the question asker, I am putting this answer down. Hopefully it is correct (fingers crossed).

Answer:

1.28 x 10²⁴atoms

Explanation:

Given parameters:

Number of moles of C₂H₆ = 2.12moles

Unknown:

Number of atoms  = ?

Solution:

A mole of a substance is used to quantity the number of atoms or other particles in a substance.

  1 mole of a substance  = 6.02 x 10²³ atoms

 To solve this problem;

 2.12 moles of the C₂H₆ will contain 2.12 x  6.02 x 10²³ atoms

                                                          = 1.28 x 10²⁴atoms

Hydrogen is covalently bonded to an element that has a small atomic radius and high electronegativity.

What do you mean by electronegativity.?

When an atom of a certain chemical element forms a chemical connection, it has a propensity to draw shared electrons (or electron density), which is represented by the symbol.  The atomic number and the separation of the valence electrons from the charged nucleus have an impact on an atom's electronegativity. An atom or a substituent group will draw electrons in greater amounts the higher the associated electronegativity. The sign and amplitude of a bond's chemical polarity, which characterises a bond along the continuous scale from covalent to ionic bonding, can be quantitatively estimated using electronegativity. The opposite of electronegativity is electro positivity, which describes an element's propensity to accept valence electrons.

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Answer:

15 protons

Explanation:

The atomic number always equals the number of protons inside the nucleus, so if the atomic number is 15, that means 15 protons are present.

Protostar forms from collapsing molecular cloud, accretes matter, and begins hydrogen fusion, becoming a star.

A protostar begins its life within a molecular cloud, a dense region of gas and dust in space. Gravity causes a small region within the cloud to collapse, forming a protostellar core.

As the core collapses, a rotating protoplanetary disk forms around it. Material from the disk accretes onto the core, causing it to heat up and become a protostar.

During the pre-main sequence phase, the protostar continues to grow in mass and size by accreting material from the disk. It goes through a T Tauri phase characterized by strong stellar winds and magnetic activity. Finally, when the protostar reaches a critical mass and temperature, hydrogen fusion begins at its core.

This marks the moment when the protostar becomes a star and enters the main sequence phase, where it will continue to fuse hydrogen into helium for a significant part of its lifespan.

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Answer:

Based off of the 'so', this is not an actual question. This is a mix of math and chem.

But if you come up with a punchline... It's a joke!

Discontinuity refers to an interruption in the regular crystal lattice structure of a metal. It is also known as a defect or imperfection in the lattice.

In the crystal lattice of a metal, the atoms are arranged in a repeating pattern, forming a regular structure. However, various factors can lead to disruptions or irregularities in this structure, resulting in what is known as a discontinuity or defect.

These defects can occur at different scales, such as point defects (individual atom irregularities), line defects (dislocations or imperfections along a line), or surface defects (imperfections on the surface).

Discontinuities can have different causes, including impurities, temperature changes, mechanical stress, or processing techniques. These defects can affect the mechanical, electrical, and thermal properties of the metal.

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The percent by mass of citric acid in the sample is 41.12%.

The first step is to determine the number of moles of NaOH used to neutralize the unknown:

moles of NaOH = Molarity of NaOH * volume of NaOH used

moles of NaOH = 0.688 mol/L * 0.0199 L

moles of NaOH = 0.0137 mol

Since citric acid is a tribasic acid, it has three reactive protons that can be neutralized by NaOH. Therefore, the number of moles of citric acid in the unknown can be calculated as follows:

moles of citric acid = (moles of NaOH)/3

moles of citric acid = 0.0137 mol/3

moles of citric acid = 0.00457 mol

The next step is to calculate the mass of citric acid in the sample:

mass of citric acid = moles of citric acid * molar mass of citric acid

mass of citric acid = 0.00457 mol * 192.12 g/mol

mass of citric acid = 0.878 g

Finally, we can calculate the percent by mass of citric acid in the sample:

percent by mass of citric acid = (mass of citric acid / mass of sample) * 100%

percent by mass of citric acid = (0.878 g / 2.135 g) * 100%

percent by mass of citric acid = 41.12%

Therefore, the percent by mass of citric acid in the sample is 41.12%.

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Answer:

mass no = A

Atomic number = Z= no of protons

Neutron = n

n = A-Z

n= 35- 17

   = 18

Explanation:

The total number of moles contained in 115 grams of C₂H5OH is 2.50 moles .

The term "mole" refers to the quantity of a substance that has the same amount of subatomic particles (ions, molecules, or atoms) as there are carbon atoms.

Atomic weight of carbon(C)= 12 gm

Atomic weight of Hydrogen (H)=1 gm

Atomic weight of oxygen (o)=16 gm

∴Molecula weight of C2H5OH =(12×2 + 1×6 + 16×1) gm

24 + 6 + 16 gm = 46 gm

∴ 46 gm of C2H5OH contains 1 mole

1 gm of C2H5OH contain = 1/46 moles

115 gm of C2H5OH contains = 115×1/46 moles

⇒2.5 moles

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Emerging scientific ideas are new theories or ideas that are gaining attention in the scientific community, but have not yet been fully accepted or confirmed.

Emerging ideas refer to the new and innovative ideas or theories that have yet to gain full scientific acceptance. While a scientific consensus is a view or theory that has been universally accepted and confirmed by multiple experiments or research, an emerging scientific idea is a new and unproven theory or idea that is gaining attention in the scientific community. These emerging ideas may also be referred to as scientific hypotheses. In contrast to scientific consensus, emerging scientific ideas have not yet been subjected to rigorous testing and confirmation.

They are generally proposed to explain new observations or experimental results, which have not yet been fully understood or explained by established scientific theories. Emerging scientific ideas can have the potential to challenge the current scientific consensus. If an emerging scientific idea is found to be valid, it can ultimately lead to the establishment of a new scientific consensus. For example, the emerging scientific idea of the Higgs boson particle led to the discovery of a new field in particle physics, which is now an established scientific consensus.

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Answer:

5 moles of H2

Explanation:

2 mol HCl * x mol H2 = 10 mol HCl  

x=5

Check work:

5 mol H2 * 2 mol HCl/1 mol H2 = 10 mol HCl

The number of moles of hydrogen gas required to produce 10 moles of HCl is 5 mol.

A mole can be described as an international scientific standard unit that is used to determine a given count of particles. The particles are generally identical entities but are individually distinct.

A mole can be used to determine a large number of atoms, molecules, ions, or particular particles. The amount of substance can be measured as elementary entities of a substance in a sample.

The number of units in 1 mole is equal to 6.023×10²³ which is known as Avogadro’s constant.

Given, the chemical reaction can be represented as:

H₂ + Cl₂ →  2 HCl

2 moles of HCl will be produced from hydrogen gas = 1 mol

Then 10 moles of HCl will be produced from hydrogen gas = 10/ 2 = 5 mol.

Therefore, 5 moles of hydrogen gas are needed to produce 10 moles of HCl.

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Answer:

The solution is

Explanation:

a = f/m

a =7/14

a=1/2

a=0.5

Acceleration of bike is 0.5 m/s²

Force used in push = 7 N

Mass of bike = 14 kg

Acceleration of bike

Force = Mass × Acceleration

Force used in push = Mass of bike × Acceleration of bike

7 = 14 × Acceleration of bike

Acceleration of bike = 7 / 14

Acceleration of bike = 0.5 m/s²

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First of all, Z is unknown. I hope it is a mistake.

        Now, it is given that the element X has nineteen electrons. This proves that X is actually Potassium.

        As per the periodic table, both Potassium and Lithium belongs to group 1 as their valency is 1 because of the presence of only one electron in the outermost shell of electrons i.e., they lose an electron during a chemical reaction to form a stable compound. Furthermore, both are metallic.

        Magnesium belongs to group 2 and hence its valency is two, which is different from potassium though it is metallic. Similiarly, bromine belongs to group 17 and gains one electron during a reaction in contrast to potassium.

( No internal links available for reference. For clarification, check the periodic table).

The temperature of the equilibrium mixture should be increased. The given decomposition reaction of \(CaCO_3\) to CaO and \(CO_2\) is endothermic, which means that the reaction requires heat to proceed.

Increasing the temperature of the equilibrium mixture will favor the endothermic reaction, causing more \(CaCO_3\) to decompose into the CaO and the \(CO_2\). As a result, the production of carbon dioxide will increase. This is because the forward reaction (decomposition of \(CaCO_3\)) is favored at higher temperatures due to the heat being absorbed by the reaction. Therefore, to increase the production of carbon dioxide in this reaction, the temperature of the equilibrium mixture should be increased.

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Answer:

Greenland is a huge island that is covered with ice, due to warming this ice has begun to melt, reaching a point where more ice is lost per year than is gained.

The temperature levels on earth have increased abnormally since the industrial revolution, that is since CO2 emissions increased. The extra CO2 released into the atmosphere does not allow the heat generated from the earth to be released into space, so the earth has begun to heat up more than normal, causing temperatures to rise.

To avoid this, CO2 emissions should be reduced, this could be achieved by using clean energy to generate electricity, such as solar or wind energy. Also if industries improve their processes to reduce the CO2 they produce. Another way is to reduce livestock farming as this industry also releases high amounts of CO2.

As individuals, from our homes what we can do is to reduce energy consumption if it is generated with fossil fuels, for example turn off the lights if we are not in the rooms, unplug appliances that we are not using, do not use products that come from polluting industries, among others.