Can someone help me with my stoichiometry homework, it is due tonight.

The scenario whereby the initial pressure is equal to the final pressure is : ( A ) A balloon filled with air is heated from 300k to 600k, causing it to expand and double in size.

Gay Lussac's law states that at constant pressure, the volume of gas is directly proportional to the change in temperature. i.e. V ∝ T. From scenario 1 the change in temperature from 300 K to 600 K shows a 100% increase in temperature which corresponds with the expansion and size doubling of the volume of gas.

Hence we can conclude that The scenario whereby the initial pressure is equal to the final pressure is : ( A ) A balloon filled with air is heated from 300k to 600k, causing it to expand and double in size.

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The different methods that can be used to create electrodes on a Borosilicate wafer are of standard and thin wall configurations.

The use of standard with filament configuration and thin wall configurations comes in different barrel sizes of one, two, three, five, and seven barrels. The capillaries that line the wall of the glass have the electrodes with the association, if needed, a wire that runs along to the record.

The thin wall single barrel configurations may be fitted with two electrodes. They do not use filings like with the standard configurations.

In order to use a silicon wafer, the additional step that is done is doping. Doping is the introduction of some impurities to the semiconductors to make them more electrically active.

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Answer: 44.8 L

At STP, 2 moles of hydrogen gas have a volume of 44.8 L.

The unbalanced equation for the reaction can be represented as follows: Sb3+(aq) + BrO3-(aq) → Sb5+(aq) + Br-(aq)

In this equation, Sb3+ represents the antimony in its reduced form, BrO3- is the oxidizing agent potassium bromate, Sb5+ represents antimony in its oxidized form, and Br- is the reduced form of bromine.

During the oxidation-reduction titration, the antimony in the sample is converted from Sb3+(aq) to Sb5+(aq) by the addition of the potassium bromate solution. The reaction consumes 41.3 ml of the 0.120 M potassium bromate solution.

The balanced equation for this reaction can be determined by ensuring that the number of atoms on both sides of the equation is balanced. However, since you requested a response within 120 words only, I have provided the unbalanced equation above.

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Answer:

2 electrons

Explanation:

The first principal energy level contains only an s sublevel; therefore, it can hold a maximum of two electrons.

Answer:i

i believe its contraction but i might be wrong

Explanation:

Answer:

It might be expansion, sorry if it's wrong.

Answer:

Yes

Beryllium is a chemical element with the symbol Be and atomic number 4. It is a steel-gray, strong, lightweight and brittle alkaline earth metal. ... Notable gemstones high in beryllium include beryl (aquamarine, emerald) and chrysoberyl.

Calcium is a mineral that is necessary for life. In addition to building bones and keeping them healthy, calcium enables our blood to clot, our muscles to contract, and our heart to beat. About 99% of the calcium in our bodies is in our bones and teeth.

The final temperature of the gas, after absorbing 1300 J of heat and doing 2200 J of work, is approximately 375.45 K.

To find the final temperature (T_final) of the gas, we can use the first law of thermodynamics, which states that the change in internal energy (ΔU) of a system is equal to the heat added (Q) minus the work done (W) by the system:

ΔU = Q - W

Since the gas is ideal and monatomic, the change in internal energy is related to the temperature change (ΔT) through the equation:

ΔU = nC_vΔT

where n is the number of moles and C_v is the molar heat capacity at constant volume.

Rearranging the equations and substituting the given values:

nC_vΔT = Q - W

(5.00 mol)(3/2R)ΔT = 1300 J - 2200 J

(5.00 mol)(3/2)(8.3145 J/(mol⋅K))ΔT = -900 J

Simplifying:

(37.9725 J/K)ΔT = -900 J

ΔT = -900 J / (37.9725 J/K)

ΔT ≈ -23.70 K

Since the initial temperature is 126 °C, we convert it to Kelvin:

T_initial = 126 °C + 273.15 = 399.15 K

Now we can find the final temperature:

T_final = T_initial + ΔT

T_final = 399.15 K - 23.70 K

T_final ≈ 375.45 K

Therefore, the final temperature of the gas is approximately 375.45 K.

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Answer:

Explanation:

The kinetic energy of an object given it's mass and velocity can be found by using the formula

\(KE = \frac{1}{2} m {v}^{2} \\ \)

where

m is the mass

v is the velocity

From the question

m = 54 kg

v = 3 m/s

The kinetic energy is

\(KE = \frac{1}{2} \times 54 \times {3}^{2} \\ = 27 \times 9 \\ = 243 \: \: \: \: \: \)

We have the final answer as

Hope this helps you

Answer:

243 J

Explanation:

JUST GOT IT RIGHT ON EDG

Answer:

Don't worry school's will re-open in August 2021. ._.

Explanation:

i think everyone does. so i'll help you

The fraction of the neutron's kinetic energy that is transferred to the carbon nucleus in a collision can be calculated using the law of conservation of energy and the law of conservation of momentum. The two laws state that the total energy and momentum of a system are conserved before and after a collision.

In a collision between a neutron and a carbon nucleus, the kinetic energy of the neutron is converted into kinetic energy of the carbon nucleus and potential energy, which is stored in the new bonds formed between the neutron and the nucleus.

The fraction of the neutron's kinetic energy that is transferred to the carbon nucleus can be calculated as follows:

KE_carbon = (m_carbon / (m_carbon + m_neutron)) * KE_neutron

where m_carbon is the mass of the carbon nucleus (12.0 times the mass of the neutron), m_neutron is the mass of the neutron, and KE_neutron is the initial kinetic energy of the neutron. KE_carbon is the kinetic energy of the carbon nucleus after the collision.

The fraction of the neutron's kinetic energy transferred to the carbon nucleus can be calculated as KE_carbon / KE_neutron.

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Answer: The mass of a 9.0 cm3 cube of lead is 102.6 g

If you multiply volume with the given density you will get the mass of the lead

here,

The given volume is 9.0 cm3 and the density is 11.4g/cm3

the mass will be (9.0*11.4)g = 102.6 g

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The mass of NaCl generated is calculated as 85%/100% * 29.225 g = 24.84 g NaCl.

what is the balanced equation of the nacl ?

Let us begin by constructing a suitably balanced equation:

2Na (s) + Cl2(g) (s)

1 mol Na yields 1 mol NaCl

Molecular weight 23 g/mol Na

11.5 g Mol Na = 11.5 g / 23 g / mol = 0.5 mol Na

This will provide 0.5 mol NaCl.

NaCl molar mass = 23 + 35.45 = 58.45 g/mol

At 100% production, the mass of 0.5 mol NaCl = 0.5 mol * 58.45 g/mol = 29.225 g.

If the true yield is 85%, then:

The mass of NaCl generated is calculated as 85%/100% * 29.225 g = 24.84 g NaCl.

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Free radicals are highly reactive molecules or atoms that have unpaired electrons in their outer shells.
Negative health consequences of a high amount of free radicals in the system include, Oxidative Stress, Inflammation, Cellular Damage.
Antioxidants are substances that can neutralize or counteract the damaging effects of free radicals.


Free radicals are highly reactive molecules or atoms that have unpaired electrons in their outer shells. They are formed as natural byproducts of various biological processes in the body, such as metabolism, immune response, and environmental factors like pollution, radiation, or smoking. Free radicals are unstable and seek to stabilize themselves by oxidizing other molecules in the body, leading to a chain reaction of damage to cells, proteins, and DNA.

Negative health consequences of a high amount of free radicals in the system include:

Oxidative Stress: Excessive free radicals can cause oxidative stress, which is an imbalance between the production of free radicals and the body's antioxidant defenses. This can result in damage to cellular components and contribute to the development of chronic diseases, including cancer, cardiovascular diseases, neurodegenerative disorders, and aging.

Inflammation: Free radicals can trigger and perpetuate inflammation in the body. Chronic inflammation is associated with various health conditions, including arthritis, asthma, diabetes, and autoimmune disorders.

Cellular Damage: Free radicals can damage cell membranes, proteins, and DNA, leading to mutations, cell dysfunction, and impaired cellular processes. This can disrupt normal cell function and contribute to the development of diseases.

Antioxidants are substances that can neutralize or counteract the damaging effects of free radicals. They help inhibit or reduce the oxidation of other molecules by donating an electron to stabilize the free radicals without becoming free radicals themselves. Antioxidants can be naturally occurring compounds found in fruits, vegetables, whole grains, nuts, and seeds, as well as synthetic substances. Some common antioxidants include vitamins C and E, beta-carotene, selenium, and various phytochemicals. Consuming a diet rich in antioxidants or supplementing with antioxidants can help protect against oxidative stress and mitigate the negative health consequences associated with high levels of free radicals.


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Answer: The by-product of photosynthesis is oxygen.

Explanation: The photosynthesis process is the process by which photoautotrophs convert light energy into chemical energy which can later be used to fuel the activities of organisms. The three important elements required for the photosynthesis process are Water, carbon dioxide and light. The product formed from this process, stored in the form of sugars, which are created from water and carbon dioxide. The by-product of the photosynthesis process is oxygen.

6CO2 + 6H2O → C6H12O6 + 6O2

Answer:

Oxygen

Explanation:

Plants don't have any use for oxygen and we get oxygen from plants

Answer:

2500 mm

Explanation:

2.5 m = 2.5 * 1000 = 2500 mm

Answer:

2500 mm

Explanation:

1 metre = 1000mm

Now,

2.5 metre = 2.5*1000 mm

= 2500 mm

Answer:

A. Sympathetic

and

C. Parasympathetic

Explanation:

Ap3x

The calculation of quantities in chemical equations is called stoichiometry. So, the correct option is (d).

By definition, stoichiometry is applying the relationships found in the balanced chemical equation to calculate the amounts of reactants or products in a chemical process. Stoichiometry was first established by Jeremias Benjaim Richter in 1792 as the science of calculating the amounts or mass ratios of chemical elements.

The proportions of variations in the concentrations of species that are interacting chemically are the subject of stoichiometry. Because they contain information about which substances are connected to one another through reactions, their proportions also reveal the topological structure of reaction networks.

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Answer:

1/64

Explanation:

From the question given above, the following data were obtained:

Time (t) = 42.78 s

Fraction of N–16 remaining (N/N₀) =?

NOTE:

N₀ => is the original amount.

N => is the amount remaining.

Next, we shall determine the number of half-lives that has elapsed. This can be obtained as follow:

Time (t) = 42.78 s

Half-life (t½) of N–16 = 7.1 s

Number of half-lives (n) =?

n = t / t½

n = 42.78 / 7.1

n = 6

Thus, 6 half-lives has elapsed.

Finally, we shall determine the fraction of N–16 that remains undecayed. This can be obtained as follow:

Number of half-lives (n) = 6

Fraction of N–16 remaining (N/N₀) =?

N = 1/2ⁿ × N₀

N = 1/2⁶ × N₀

N = 1/64 × N₀

Divide both side by N₀

N/N₀ = 1/64

Therefore, 1/64 of the sample remains undecayed.

The number of moles of gas is the same on both sides, the change in volume will not affect the equilibrium position of the reaction. The answer is B) There is no change because there are the same number of moles of gas on both sides.

To determine the change that will occur when the container is shrunk from 9.0 L to 3.0 L for the given reaction:

51.8 kJ + H₂(g) + I₂(g) → 2HI(g)

We need to consider the number of moles of gas on each side of the reaction.

On the left side, there are 2 moles of gas (H₂ and I₂), while on the right side, there are 2 moles of gas (2HI). Both sides have an equal number of moles of gas.

Therefore, the correct answer is B) There is no change because there are the same number of moles of gas on both sides.

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The total pressure of the gaseous mixture will be 0.184 atm.

The ideal gas equation is:

PV = nRT

Where P is pressure, V is the volume, n is the number of  the moles, R  is the constant of the gases, and T is  the temperature.

So, the sample of N₂O₃ will only have its temperature get doubled, with the same volume and the same number of moles. Temperature and  the pressure are directly related, so if one increases the other one also increases, then the pressure must double to the 0.092 atm.

The decomposition occurs as follows:

N₂O₃(g) ⇄ NO₂(g) + NO(g)

So, 1 mol of N₂O₃ will produce 2 moles of  products (1 of each), so n will double. The volume and temperature are now constants, and  pressure is directly proportional to the number of moles, so  pressure will  get doubled to 0.184 atm.

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Your question is incomplete, for full question please refer below:

A sample of N2O3(g) has the pressure of 0.046 atm . The temperature is (in K)  then doubled and the N2O3 undergo complete decomposition to NO2(g) and the NO(g). Find  total pressure of mixture of gases assuming constant volume and  with no additional temperature change

Answer:

Weak acids and bases are only partially ionized in their solutions, whereas strong acids and bases are completely ionized when dissolved in water.

Explanation:

Answer:

Because it serves their agenda.

Answer:

yes they are < 3

Explanation:

Answer:

0.342 mol

Explanation:

Molar mass of  

NaCl = 58.4 g/mol

Number of moles in  

20.0 g NaCl

is

20.0

g

58.4

g

/mol

=

0.342 mol

The order of the mass measurements from smallest to largest is: 10 mg: This is the smallest unit of mass measurement in the given list. It is equal to 0.01 grams or 0.00001 kilograms.

10 g: This is the second smallest unit of mass measurement in the given list. It is equal to 10,000 milligrams or 0.01 kilograms.

10 kg: This is the second largest unit of mass measurement in the given list. It is equal to 10,000 grams or 10,000,000 milligrams.

10 Mg: This is the largest unit of mass measurement in the given list. It is equal to 10,000 kilograms or 10,000,000 grams.

It is important to understand the different units of mass measurement and their conversions, as they are used in many fields, such as science, engineering, and medicine, to measure and calculate the properties of objects and materials.

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Answer:

One reactant

Explanation:

To determine the best HCl solution to use for the titration, you'll need to calculate the approximate volume of HCl required to reach the equivalence point. The equivalence point is the point at which all the NH3 has reacted with HCl.

The balanced chemical equation for the reaction is:

NH3 + HCl → NH4Cl

moles of NH3 = 0.3 M x 0.02 L = 0.006 moles

Therefore, we need to add 0.006 moles of HCl to the solution to reach the equivalence point.The concentration and volume of the four HCl solutions are:

0.1 M, 50 mL

0.2 M, 25 mL

0.25 M, 20 mL

0.3 M, 16.7 mL

To determine which solution is best, we can calculate the number of moles of HCl that would be added to the solution for each of the four solutions:

0.1 M HCl: 0.1 M x 0.050 L = 0.005 moles HCl

0.2 M HCl: 0.2 M x 0.025 L = 0.005 moles HCl

0.25 M HCl: 0.25 M x 0.020 L = 0.005 moles HCl

0.3 M HCl: 0.3 M x 0.0167 L = 0.005 moles HCl

As we can see, the 0.3 M HCl solution would be the best choice, as it would require a volume of 16.7 mL to add 0.006 moles of HCl, which is the closest to the amount needed for the reaction.

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Answer:

Elements:

Platinum - Pt

Silicon - Si

Lead - Pb

Hydrogen- H

Silver - Ag

Symbols:

Pr - Praseodymium

K - Potassium

Br - Bromine

Mg - Magnesium

Hg - Mercury