a 5.00 g sample of acrylic glass, which is sometimes used as a break-resistant glass substitute, contains 3.57 g of carbon, 0.48 g of hydrogen, and 0.95 g of oxygen. what is the percent composition of acrylic glass?

Answer:

Explanation:

siltstone

Over millions of years, silt washed into a lake formed layers of sedimentary rock. What type of rock was likely formed? A type of detrital sedimentary rock called siltstone was the likely product of this process.

Answer:

The number 94.38 × 10² in scientific notation is:

9.438 × 10³

Coefficient: 9.438

Exponent: 3

Explanation:

The number 94.38 × 10² in scientific notation is:

9.438 × 10³

Coefficient: 9.438

Exponent: 3

To convert 94.38 × 10² into scientific notation, move the decimal point to the right and raise 10 to the appropriate exponent.

To convert the number 94.38 × 10² into scientific notation, we need to move the decimal point to the right so that there is one non-zero digit to the left of the decimal point. In this case, we will move the decimal point two places to the right, resulting in a coefficient of 0.9438.

Since we moved the decimal point two places to the right, we need to raise 10 to the power of 2, or 10². Therefore, the exponent will be 2.

The correct scientific notation is 0.9438 × 10². The coefficient is 0.9438 and the exponent is 2.

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Answer:

The greater the frequency means the more energy transferred.

The greater the wavelength means the less energy transferred

In vivo, most naturally occurring amino acids adopt the L-configuration or the L-stereoisomer. The L-configuration refers to the spatial arrangement of atoms around the central carbon atom (the α-carbon) in the amino acid molecule. In this configuration, the amino group (-NH2) is positioned to the left, and the carboxyl group (-COOH) is positioned to the right when the molecule is drawn in the Fischer projection.

The prevalence of the L-configuration in amino acids can be attributed to the evolutionary history of life on Earth. It is believed that early biochemical processes favored the production of L-amino acids, possibly due to the asymmetry created by certain enzymatic reactions. Over time, this bias toward L-amino acids became dominant in living organisms.

The stereoisomer D-configuration, on the other hand, is less common in naturally occurring amino acids. D-amino acids can be found in certain organisms, such as bacteria, and in special contexts, such as in the cell walls of some bacteria or in peptides produced by non-ribosomal peptide synthesis. However, they are generally rare in proteins found in living systems.

It is important to note that while L-amino acids are predominant in proteins, there are exceptions. For instance, the amino acid glycine lacks a chiral center and is achiral, meaning it does not have a specific L- or D-configuration. Additionally, some non-proteinogenic amino acids, which are not incorporated into proteins, may have different stereochemical configurations.

Overall, the L-configuration is the most commonly observed stereochemical configuration for amino acids in vivo, playing a crucial role in the structure, function, and chemistry of proteins in living organisms.

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The diagram represents a nuclear fission reaction where a Uranium-235 nucleus absorbs a neutron, becomes unstable and splits into two fragments releasing energy and neutrons.

Nuclear fission is the process of splitting an atomic nucleus into two or more smaller nuclei with the release of energy, while nuclear fusion is the process of combining two or more atomic nuclei into a larger nucleus with the release of energy.

In a nuclear fission reaction, energy is released due to the conversion of a small amount of mass into a large amount of energy, in accordance with Einstein's famous equation E=mc^2. The release of energy occurs when the Uranium-235 nucleus splits into two fragments, releasing neutrons and gamma radiation in the process.

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A tiny permanent magnet is always susceptible to demagnetization or having the polarity of the magnet reversed by lightning.

Even a permanent magnet is sensitive to induction, which can cause its polarity to change and become stronger, weaker, or even reversed.

Not just in multicellular creatures but also in individual cells and subcellular structures, polarity enables the development of functional complexity. Polar organisation enables physical relationships between areas with various functions in a way that supports function integration across the entire organism.

The polarity of water causes hydrogen bonds to form when adjacent water molecules are drawn to one another by their opposing charges. Other polar molecules and ions, such as many biomolecules including sugars, nucleic acids, and certain amino acids, are likewise drawn to or attracted by water.

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Answer:

renewable energy sources such as solar and wind DONT emit carbon dioxide and other greenhouse gases that contribute to global warming

Explanation:

A solution is composed of a solute and a solvent

Your question is incomplete but I can see that you want to know something about solutions.

A solution in chemistry is a hom----ogeneous mixture of two or more substances. In a solution, the solute is the substance that is dissolved in the solvent to form the mixture. The solute particles are evenly dispersed in the solvent, resulting in a uniform composition throughout the solution.

Solutions can be either liquid, gaseous, or solid, depending on the state of the solute and solvent. For example, a sugar solution is a mixture of sugar dissolved in water, where the water is the solvent and the sugar is the solute. A gaseous solution is a mixture of gases, such as air, which is a mixture of nitrogen, oxygen, and other gases.

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Answer:

Water applied to the surface of a relatively dry soil infiltrates quickly due to the affinity of the soil particles for water. As time passes and the soil becomes wet, the force of gravity becomes the dominant force causing water to move.

Explanation:

Answer:

Gravity

Explanation:

Water applied to the surface of a relatively dry soil infiltrates quickly due to the affinity of the soil particles for water. As time passes and the soil becomes wet, the force of gravity becomes the dominant force causing water to move.

The concentration of the solution is 0.05 M

the molecular mass of HNO3 = 1 + 14+ 16 X 3 = 63g

we know the formula mass = number of moles X molecular mass the compound

the concentration of solution nothing but moles of compound in solution thus moles of solution = 3.15/63 = 0.05 M

A chemical species' concentration in a solution, specifically the amount of a solute per unit volume of solution, is measured by its molar concentration. The most prevalent molarity unit in chemistry is the number of moles per liter, denoted by the unit symbol mol/L or mol/dm3 in SI units.

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The isotope symbol that fits each description is as follows: 68 neutrons, 47 electrons is Ag b. mass number = 197, 79 electrons is Au c. atomic number = 86, 136 neutrons is Rn d. atomic number = 76, mass number = 192 is Os.

Isotopes are two or more atom types that share the same atomic number (number of protons in their nuclei), location in the periodic table, and chemical element but have distinct nucleon numbers (mass numbers) as a result of having a different number of neutrons in their nuclei. Although the chemical properties of each isotope of a given element are nearly identical, they differ in their atomic weights and physical characteristics.

The name "isotope" refers to the fact that different isotopes of the same element occupy the same location on the periodic table. The word "isotope" is derived from Greek origins that mean "the same place".

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Answer:

Cell Y Only

Explanation:

Answer: Average global temperature might increase. Certain parts of the earth would be toast and the rest would be melting.

Explanation: Because carbon dioxide in the atmosphere prevents some radiation from Earth's surface from escaping to space.

Answer:

Neon and Methane

Explanation:

Nitrogen and Oxygen made up way over half of the atmosphere so it's without a doubt, not those two. Precisely, Nitrogen makes up 78% of the atmosphere while oxygen makes up 21%

Answer: neon and methane

The right response is C. because gas particles are closer together than solid or liquid particles. Because gas particles are constantly moving, there is less room between them than there is in solids or liquids.

In other words, when a gas is compressed, its particles become smaller and closer together, decreasing the distance between them and raising the pressure. This is the reason why a gas may be compressed.

When a gas is compressed, its particles are compelled closer together, which reduces the gas's volume and raises its pressure. This is because gas particles may move more freely and occupy more space since they are always moving and have more kinetic energy than solid or liquid particles.

There is an increase in pressure when a gas is compressed because the particles are confined to a smaller space and collide more often with one another and the container walls. Boyle's law, which states that at a fixed temperature, a gas's pressure is inversely proportionate to its volume, describes this phenomena.

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"The species that would be expected to have the highest concentration in the 0.1 M solution of H₂S is HS⁻ (option c)."

In a 0.1 M solution of hydrogen sulfide (H₂S), the species that would be expected to have the highest concentration depends on the dissociation equilibrium of H₂S. Hydrogen sulfide is a weak diprotic acid, meaning it can donate two protons (H⁺) in separate steps. The dissociation of H₂S can be represented as follows:

H₂S ⇌ H⁺ + HS⁻ (Equation 1)

HS⁻ ⇌ H⁺ + S²⁻ (Equation 2)

To determine which species will have the highest concentration, we need to examine the acid dissociation constants (Ka) for these equilibria.

From Equation 1, the equilibrium constant expression can be written as:

Ka1 = [H⁺][HS⁻] / [H₂S]

From Equation 2, the equilibrium constant expression can be written as:

Ka₂ = [H⁺][S²⁻] / [HS⁻]

In a dilute solution like 0.1 M, we assume that the dissociation of H₂S is incomplete, so we can make the approximation [H₂S] ≈ 0.1 M. Therefore, the concentration of H₂S is approximately constant.

Now, let's consider the pKa values for these equilibria. The pKa1 value for H₂S is approximately 7, and the pKa₂ value for HS⁻ is approximately 14.

Since pKa₁ is lower than pKa₂, it means that the equilibrium represented by Equation 1 is more favorable than the one represented by Equation 2. Thus, at equilibrium, the concentration of HS- will be higher than that of S2-.

Therefore, the species that would be expected to have the highest concentration in the 0.1 M solution of H₂S is HS⁻ (option c).

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Answer:

Metal

Element: Calcium

Valency: 2

Explanation:

To find the element, let's use the periodic table. (Look below)

We already went past 3 shells, just need the 2 electrons after it.

Just skip to the 4th row and count 2 to the right

We end up at Calcium.

Calcium is a metal and we're also on the alkaline earth metals column.

Calcium will need to lose 2 electrons to reach stability, so the valency is 2.

Answer:

The velocity of the bb when it reaches a height of 203 m can be determined using the laws of projectile motion. Since the bb is moving vertically upwards, its velocity at that height will be zero.

brainlest?

Answer: v = 83.96 m/s

Assuming the acceleration due to gravity is approximately 9.8 m/s^2, we can use the principles of projectile motion and energy conservation.

Using the equation for the vertical displacement of an object in free fall:

Δy = (v₀² - v²) / (2g)

Δy = vertical displacement (203m)

v₀ = initial velocity (105 m/s)

v = final velocity (not known yet)

g = accerlation due to gravity (9.8 m/s^2)

Lets rearrange the equation to solve for the final velocity:

v = v = √(v₀² - 2gΔy)

Substituting the given values:

v = √(105² - 2 * 9.8 * 203)

v ≈ √(11025 - 3979.6)

v ≈ √(7054.4)

v ≈ 83.96 m/s

Therefore, when the BB pellet is at the height of 203m, its velocity will be approximately 83.96 m/s.

The  X element in the compound = titanium

The chlorine has the molecular weight = 35.5 g/mol

In the compound of Xcl4 , there are four atoms of chlorine molecules who occupy 0.75 of total weight.

The weight of all 4 chlorine atoms = 4×35 = 140 g/mol

Now the total weight of the all chlorine atoms in the compound = 140/0.75

Now the total weight of  the compound = 186.66≈ 187

The weight of X element = 187 - 140 = 47 g /mol

if we match any element from the periodic table , so can find that the titanium has the molecular weight roughly equal to 47.

So The compound is TiCl4 whose molecular weight is 140 g/mol.

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Answer:

Hello! Your answer would be BELOW

Explanation:

So a molten salt powers electricity. Hence, molten sodium chloride conducts electricity due to the presence of free ions. So, the correct answer is option D.      Atoms of sodium and chloride.

Hope I helped! Hope you make an 100%

-Amelia♥

Option (4) is correct. The rate constant of a second order reaction has the unit  L/mole. sec.

In the Second order reaction the rate is proportional to the square of the concentration of one reactant. Rate of Second order reaction  is proportional to the product of the concentrations of two reactants. Such reactions generally have the form,

A + B → products.

Each monomer combines to form a larger molecule is called dimer. For the units of the reaction rate to be moles per liter per second (M/s), the units of a second-order rate constant must be the inverse (M−1·s−1). Because the units of molarity are expressed as mole/L, the unit of the rate constant can also be written as L(mole ·s).

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The reaction is an example of an electrophilic addition reaction and the product obtained is an organic product. It is noteworthy that organic products are derived from living organisms and generally contain carbon and hydrogen.

Markovnikov's rule predicts the regioselective outcome of an electrophilic addition reaction of a protic acid to an alkene. It states that the electrophile (positive charged species) will be added to the alkene carbon with the highest number of hydrogen atoms, and the nucleophile (negative charged species) will be added to the carbon with the lowest number of hydrogen atoms.

In the reaction of hydrogen chloride with 2-methyl-2-butene, the electrophilic hydrogen (H+) from HCl is added to the double bond of 2-methyl-2-butene. According to Markovnikov's rule, hydrogen will be added to the carbon that has more hydrogen atoms and the chloride ion (Cl-) will be added to the carbon that has fewer hydrogen atoms.The major organic product of the reaction between hydrogen chloride and 2-methyl-2-butene is 2-chloro-2-methylbutane. The hydrogen from HCl adds to the tertiary carbon of 2-methyl-2-butene, forming a tertiary carbocation, which is more stable than secondary or primary carbocations. The chloride ion (Cl-) then attacks the carbocation to form 2-chloro-2-methylbutane, which is the major organic product.2-methyl-2-butene + HCl → 2-chloro-2-methylbutane.

The reaction is an example of an electrophilic addition reaction and the product obtained is an organic product. It is noteworthy that organic products are derived from living organisms and generally contain carbon and hydrogen. Hydrogen chloride is a strong acid, and it reacts with the 2-methyl-2-butene to form 2-chloro-2-methylbutane as the major organic product.

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Answer:

The correct answer is A, "increase the temperature."

Explanation:

By increasing the temperature, it would shift the reaction to the right. All of the other options would either cause the reaction to shift left, or are simply invalid. I hope this helps!

Increase in temperature will  increase the yield of the product and cause a shift to the right.

This is the type of reaction in which reactants absorb heat energy from the surroundings to form products.

This depicts that an increase in temperature will increase the yield of products thereby making option A the most appropriate choice.

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The different types of the elements does she have available to study are :

Hydrogen, Phosphorus , Oxygen, Carbon, Magnesium, Sulphur, Potassium, Chlorine.

1) The chemical formula of the phosphoric acid is : H₃PO₄

Elements : Hydrogen, phosphorus, oxygen

2) The chemical formula of the glucose is : C₆H₁₂O₆

Elements : Carbon, Hydrogen, oxygen

3) The chemical formula of the Epsom salts  is : MgSO₄

Elements : Magnesium, Sulfur, Oxygen

4) The chemical formula of the chlorate of potash is : KClO₃

Elements : Potassium, Chlorine and Oxygen.

Thus, the Hydrogen, Phosphorus , Oxygen, Carbon, Magnesium, Sulphur, Potassium, Chlorine are the different elements to study.

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Answer:

C. It is nonspontaneous and requires an electric current.

Explanation:

An oxidation-reduction (redox) reaction is a type of chemical reaction in which electrons are transferred between chemical species. In redox reactions,  a reduced half and an oxidized half occur together. When an object is electroplated, the occurrence of a redox reaction is nonspontaneous and it requires an electric current.

Answer:

fdsfesd

Explanation:

fesdfes

10.63 grams of ZnO remain after the reaction is complete.

The balanced chemical equation for the reaction between zinc oxide and water is:

ZnO(s) + H2O(l) → Zn(OH)2(aq)

No. of moles of ZnO = Mass of ZnO / Molar mass of ZnO= 35.0 g / 65.38 g/mol= 0.535 moles of ZnO

The amount of water is given as 6.85 g

The molar mass of water is:H2O = 18.02 g/mol

No. of moles of H2O = Mass of H2O / Molar mass of H2O= 6.85 g / 18.02 g/mol= 0.380 moles of H2O

Now, we need to find out the limiting reagent.

.No. of moles of Zn(OH)2 formed from 0.535 moles of ZnO = 0.535 molesNo. of moles of Zn(OH)2 formed from 0.380 moles of H2O = 0.380 moles

Therefore, since the amount of ZnO (0.535 moles) is greater than the amount of H2O (0.380 moles), H2O is the limiting reagent and ZnO is the excess reagent.

The maximum amount of Zn(OH)2 that can be formed is given by the amount of ZnO that reacts with H2O, which is 0.380 moles.

No. of grams of Zn(OH)2 = No. of moles of Zn(OH)2 × Molar mass of Zn(OH)2= 0.380 mol × (97.41 g/mol)= 37.08 gThe formula for the limiting reagent is H2O. The amount of excess reagent remaining after the reaction is complete can be calculated by subtracting the amount of limiting reagent used from the initial amount of excess reagent

.Initial amount of excess reagent (ZnO) = 35.0 g

No. of moles of ZnO = Mass of ZnO / Molar mass of ZnO= 35.0 g / 65.38 g/mol= 0.535 moles of ZnO

Amount of ZnO used in the reaction = No. of moles of Zn(OH)2 formed × Ratio of ZnO to Zn(OH)2= 0.380 mol × (1 mol ZnO / 1 mol Zn(OH)2)= 0.380 moles of ZnO used

Amount of ZnO remaining after the reaction = Initial amount of ZnO − Amount of ZnO used= 35.0 g − (0.380 mol × 65.38 g/mol)= 10.63 g

Therefore, 10.63 grams of ZnO remain after the reaction is complete.

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In a low pressure system, wind moves in a counterclockwise direction.

The effect wind have in a low pressure system is the Coriolis effect, which is the apparent deflection of moving objects (including wind) caused by the rotation of the Earth.

In a low pressure system, air rises from the surface, creating a region of lower atmospheric pressure at the center of the system. The surrounding higher pressure air then flows inwards towards the center to replace the rising air, and is deflected to the right (in the Northern Hemisphere) or left (in the Southern Hemisphere) by the Coriolis effect, resulting in the counterclockwise or clockwise circulation.

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