if you can fill out this worksheet 100 pts! only 5 questions, about stoichiometry PLEASE HELP ASAP!!

Answer:

Hydrogen, H, has an oxidation number of +1 unless it is combined with metals, where it has the oxidation number -1. –Examples – LiH = Li+ H-, BaH2= Ba 2+ H-7. Oxygen usually has the oxidation number -2.

Explanation:

10.5 kJ is required to convert the temperature of water.

What is Temperature?

Temperature is a unit used to describe hotness or coldness. It can be stated in terms of any number of arbitrary scales and shows the direction in which heat energy will naturally flow, i.e., from a hotter body to a colder body (one at a lower temperature). Temperature is not the same as the energy of a thermodynamic system; for instance, an iceberg has a significantly larger total heat energy than a match.

As opposed to extensive characteristics, like mass or volume, temperature is referred to as an intense property—one that is independent of the quantity of matter being considered—along with pressure, density, and other comparable properties.

q=m⋅c⋅ΔT, where

q - heat absorbed

m- the mass of the sample

c- the specific heat of the substance

ΔT - the change in temperature, defined as final temperature minus initial temperature

q=100.0g⋅4.18Jg∘C⋅(50.0−25.0)∘C

q= 10.5 kJ

10.5 kJ is required to convert the temperature of water.

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A liquid with stronger intermolecular forces will have a lower vapor pressure at a given temperature and thus a higher boiling point.

Answer:

5) A change in the state of matter is caused if enough what is added to or removed from a object.

A) thermal energy

C) potential energy

D) force

One reason that we say that light is a wave is because light waves can travel through a medium.

A wave can be defined as a disturbance along a medium which transfers energy. It then follows that waves move energy from one point to another.

Waves can be classified as;

Mechanical waves are those waves that  require a material medium for propagation such as sound, and waves on a strings while electromagnetic waves do not require a material medium for propagation.

Light exhibits certain behaviors that are characteristic of any wave. Light reflects in the same manner that any wave would reflect. Light refracts in the same manner that any wave would refract. Light diffracts in the same manner that any wave would diffract. Light undergoes interference in the same manner that any wave would interfere. And light exhibits the Doppler effect just as any wave would exhibit the Doppler effect. Light behaves in a way that is consistent with our conceptual and mathematical understanding of waves. Since light behaves like a wave, one would have good reason to believe that it might be a wave.

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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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Answer:

Class M

Explanation:

Explanation:

➢number of moles. Moles and Chemical Reactions. Chapter 4. 3 H2. + N2. →. 2 NH3 ... How many grams of NH3 would form if 2.11 moles of N2 reacted with ...

Answer:

o

Explanation:

Answer:

The cycle of prototyping, testing, and refining that's at the core of iterative design offers numerous benefits: Testing gives you a valuable collection of user feedback that you can use to improve your site and to understand what's working for you. It helps you catch problems before they spiral out of control.

Iteration assists you in detecting problems before they go out of control.

Iteration is a design technique that revolves around a cyclical process of developing, testing, evaluating, and refining a product or process. Changes and adjustments are made based on the outcomes of testing the most current version of a concept.

Iteration, or the cycle of prototyping, testing, and refining that is at the heart of iterative design, has multiple advantages. Testing provides you with a valuable collection of user input that you can use to develop your site and understand what works for you.

Hence, Iteration assists you in detecting problems before they go out of control.

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To solve this problem, we need to use the equilibrium expression for the base dissociation reaction of pyridine:

C5H5N + H2O ↔ C5H5NH+ + OH-

where Kb is the base dissociation constant for pyridine, defined as:

Kb = [C5H5NH+][OH-]/[C5H5N]

We can use the Kb value to determine the concentration of hydroxide ions produced when pyridine dissolves in water. We can assume that the initial concentration of pyridine is equal to the final concentration of pyridine, since pyridine is a weak base and only partially dissociates in water.

We can also assume that the concentration of hydroxide ions produced is much smaller than the initial concentration of pyridine, so we can neglect its contribution to the total concentration of the solution.

First, we can calculate the concentration of hydroxide ions produced by pyridine:

Kb = [C5H5NH+][OH-]/[C5H5N]

1.7 x 10^-9 = [x][x]/[0.10-x]

where x is the concentration of hydroxide ions produced by pyridine.

Simplifying the expression, we get:

x^2 / (0.10 - x) = 1.7 x 10^-9

Since x is much smaller than 0.10, we can assume that (0.10 - x) is approximately equal to 0.10:

x^2 / 0.10 = 1.7 x 10^-9

Solving for x, we get:

x = sqrt(1.7 x 10^-9 x 0.10) = 1.2 x 10^-5 M

Therefore, the concentration of hydroxide

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Automated urine particle digital imaging does not measure the composition or chemical properties of the urine particles.

Automated urine particle digital imaging (AUPDI) is a diagnostic tool that uses high-resolution digital imaging to analyze the size and shape of urine particles. It provides information about the presence and abundance of different types of particles in the urine, such as red blood cells, white blood cells, epithelial cells, and crystals.

However, AUPDI does not measure the chemical or compositional makeup of the particles. This information would require additional testing, such as a urine chemical analysis or urine culture, to determine.

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The reaction between 2-methyl-2-pentanol and sulfuric acid to yield 2-methyl-2-pentene goes via an elimination reaction

Elimination reactions are those that proceed by the removal of one or more atoms or functional groups from the reactants, resulting in the formation of a new double bond or π bond in a product. An example of an elimination reaction is the dehydration of alcohols.In this particular reaction, 2-methyl-2-pentanol (an alcohol) reacts with sulfuric acid to produce 2-methyl-2-pentene, which is an alkene.

The reaction mechanism proceeds via an elimination reaction, where the OH group and a hydrogen ion (H+) are removed from the reactant, resulting in the formation of a double bond between the adjacent carbon atoms in the product.The reaction can be represented as follows:CH3C(CH3)2CH(OH)CH3 + H2SO4 → CH3C(CH3)2C=CH2 + H2O + H2SO4In conclusion, the reaction between 2-methyl-2-pentanol and sulfuric acid to yield 2-methyl-2-pentene goes via an elimination reaction.

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Answer:    

Darwin observed   many  different   types of mockingbirds and finches lived in different island environments.

45 ml of  0.100M NaOH is required to completely neutralize 15.00mL of 0.100M H₃PO₄.

A neutralization reaction is when an acid and a base react to shape water and salt and includes the aggregate of H+ ions and OH- ions to generate water. The neutralization of a robust acid and strong base has a pH same to 7.

Neutralization is a chemical reaction in which acid and a base react quantitatively with each different. In a response in water, neutralization results in there being no extra hydrogen or hydroxide ions present within the solution.

Given;

M₁ = 0.100M NaOH

valance factor n₁ = 1

V₁ = ?

M₂ = of 0.100M H3PO4

valance factor n₂ = 3

V₂ = 15.00mL

M₁n₁V₁ = M₂n₂V₂

V₁ = M₂n₂V₂/M₁n₁

    = 0.1 × 3 × 15 / 0.1 × 1

     = 45 ml

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Burrows, tracks, coprolites, nests and footprints are examples of traces that can be found in a fossil.

Answer:

The change in smell

Explanation:

chemical reactions ccan lead to change in temperature, change in color and also change in smell

Answer:

C

Explanation:

ostriches are classified as diurnal

Answer: The answer is diurnal!

Explanation: Nocturnal animals, such as the owl or bat, stay awake during the night and sleep during the day! Which for diurnal animals, they sleep during the night, and roam around during the day! Such as us humans are both because some people may work during the night and sleep during the day! The most common for humans is us sleeping at night though and awake during the day!

Based on the nature of chemical equilibrium, the system reached equilibrium first at the time T2.

Chemical equilibrium refers to the state of a reversible chemical reaction in which the rate of forward reaction for the the formation is equal to the rate of backward reaction for the formation of reactants.

In the table of the decomposition reaction given above, the system reached equilibrium first at the time T2 when the concentration of the reactant and products were the same.

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Answer:

T3

Explanation:

I've taken the test

Answer:

This answer is 108g mass of aluminum is produced from 100g of aluminum oxide

Answer:

Elastic potential energy is energy stored as a result of applying a force to deform an elastic object. The energy is stored until the force is removed and the object springs back to its original shape, doing work in the process. The deformation could involve compressing, stretching, or twisting the object.

Answer:

1. 5

2. 13

Explanation:

1. AB = 2 + 3 = 5

2 A2B2 = 2(2) + 3(3) = 4 + 9 = 13

Answer:

B.) Na₂SO₄

Explanation:

Covalent bonds are bonds which involve electrons being shared between two atoms. These bonds only occur between nonmetals.

Ionic bonds are bonds which involve electrons being given or taken by two atoms. These bonds form between a metal and a nonmetal.

NH₃ contains nitrogen and hydrogen, two nonmetals. Therefore, this molecule only contains covalent bonds.

Na₂SO₄ has both covalent and ionic bonds. The covalent bonds are found within the polyatomic ion, SO₄²⁻. Sulfur and oxygen are both nonmetals, thus covalently combining. The ionic bond forms between the  Na⁺ and SO₄²⁻. Sodium (Na) is a metal which wishes to give up electrons to have a complete octet. SO₄²⁻ serves as the anion which it bonds with.

CH₃COOH contains hydrogen, carbon, and oxygen. All of these are nonmetals, thus the only bonds formed are covalent.

NaCl contains sodium, a metal, and chlorine, a nonmetal. Therefore, this compound is held together by an ionic bond.

The heat absorbed when 15.0 g of water freezes is 5.01 kJ.

Chemical reaction or physical change is endothermic if heat is absorbed by the system from the surroundings.

The heat absorbed or released during a phase change can be calculated using the equation q = mL,

where

For the case of 15.0 g of water freezing, the heat absorbed can be calculated as follows:

q = mL

q = (15.0 g) * (6.01 kJ/mol) / (18.015 g/mol)

q = 5.01 kJ

Therefore, the heat absorbed when 15.0 g of water freezes is 5.01 kJ.

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Answer: This is called a chemical reaction.

Explanation: Gas may form, heat may be produced, and color may change. These types of changes indicate that a chemical reaction has occurred.

The temperature of the exiting liquid will be equal to the temperature at the inlet, since the process is isentropic.

To estimate the work required to compress the saturated water vapor up to P = 10 bar and T = 4000C, you can use the ideal gas law.

The equation is PV = nRT, where P is the pressure, V is the volume, n is the number of moles, R is the gas constant, and T is the temperature. Since the ideal gas law is based on the assumption that the gas behaves as an ideal gas, the temperature must remain constant while the volume is changing.

Thus, the work done is equal to the area under the PV curve, which can be calculated using the equation W = -nRT ln (V2/V1).

For the second part, the pump is operating isentropically, meaning that the entropy of the system does not change. The work done is equal to the change in enthalpy, which can be calculated using the equation W = h2 - h1. The enthalpies of the liquid water can be looked up in a thermodynamic property table.

The temperature of the exiting liquid will be equal to the temperature at the inlet, since the process is isentropic.

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