Micheal has an infection in his sinuses and lungs, but has no sick


time, so goes to work anyway. He is coughing and sneezing the


whole shift and only remembers to cover his nose and mouth about


half the time. Which link represents the break in the chain of


infection in this scenario, placing you at risk of contracting the


infection?


f


Select one:


a.


Reservoir


b.


Infectious agerte


C.


Port of exit


d.


Port of entry

Answer:

don't know this but going to figure out

Answer

Acid

Procedure

pH is a measure of how acidic/basic water is. The range goes from 0 - 14, with 7 being neutral. pHs of less than 7 indicate acidity, whereas a pH of greater than 7 indicates a base.

As with the hydrogen-ion concentration, the concentration of the hydroxide ion can be expressed logarithmically by the pOH.

We have that pH + pOH = 14

Therefore pH= 14- pOH

In this case, we have pH= 14-9 = 5

A pH of 5 is similar to that of coffee, therefore the best answer is: acid

Answer:

10

Explanation:

a centimeter and a milimeter differ from each other by a factor of 10

Answer: 10

Explanation:

The statement is false. The relationship between the amount of reactant consumed and time is not curvilinear, but rather follows a specific pattern based on the reaction kinetics.

In most chemical reactions, the amount of reactant consumed with respect to time follows a linear or exponential relationship. In a linear relationship, the rate of reaction is constant, and the amount of reactant consumed increases linearly with time. This often occurs in simple reactions with a constant rate. In contrast, an exponential relationship is observed in many reactions governed by complex kinetics. Initially, the reaction rate is high, and the amount of reactant consumed is rapid. As the reaction progresses, the rate slows down, and the amount of reactant consumed per unit of time decreases exponentially. This can occur in reactions with multiple steps, intermediate species, or factors affecting the reaction rate. Therefore, the relationship between the amount of reactant consumed and time is typically linear or exponential, depending on the reaction kinetics, and not curvilinear.

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The concentration of acetic acid:

The concentration of the acetic acid before titration is 0.128 M

What is titration?

Titration is a quantitative analytical procedure that works by allowing a known analyte to gradually react with a titrant until an endpoint is reached.

Titration for weak acid and strong base:

Moles of acetic acid =  moles of NaOH

Given:

Concentration of NaOH = 0.1067 M

Volume of NaOH = 30.07 ml = 0.03007 L

Calculation:

So, by using the formula, Concentration = Moles/Volume

Moles of NaOH = concentration x volume = 0.1067 x 0.03007 = 0.0032

Therefore, the moles of acetic acid  = 0.0032 mole

Now, using the formula again for determining the concentration of acetic acid, we get,

Concentration = Moles/Volume

Concentration of acetic acid =  0.0032/0.025 = 0.128M

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A chemical equation shows the reactants (left side) and products (right side) in a chemical reaction.

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Answer:

Frequency = Velocity / Wavelength

or

f = v / λ

There are no unpaired electrons present in this atom of oxygen.

The molecular orbital configuration of the oxygen atom given is,

1s²2s²2px²2py².

As we can see, there is not electron in the configuration which is alone in the orbital, they all are present in pairs. So, there are no unpaired electrons present.

This state of the oxygen atom when there are no unpaired electron are present, this could be the ground state of the atom.

The ground state of the atom is when the potential energy of the electrons of the atom is minimum.

In this configuration, no electron is unpaired, all the electrons are paired.

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The three definitions for acids and bases, ranked from the least to the most inclusive, are Arrhenius, Bronsted-Lowry, and Lewis.

1. Arrhenius Definition (Least inclusive)
2. Bronsted-Lowry Definition
3. Lewis Definition (Most inclusive)


1. Arrhenius Definition: The least inclusive definition. According to this theory, acids are substances that produce hydrogen ions (H+) when dissolved in water, while bases are substances that produce hydroxide ions (OH-) when dissolved in water.
2. Bronsted-Lowry Definition: More inclusive than Arrhenius. This definition states that acids are proton (H+) donors and bases are proton (H+) acceptors.
3. Lewis Definition: The most inclusive definition. In this theory, acids are electron-pair acceptors and bases are electron-pair donors.

Summary:
The three definitions for acids and bases, ranked from the least to the most inclusive, are Arrhenius, Bronsted-Lowry, and Lewis.

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Answer:

Half life = 1.83 sec

Explanation:

Given data:

Total amount of Ar-35 = 1.80 g

Amount left after 5.49 sec = 0.225 g

Half life of Ar-35 = ?

Solution:

At time zero = 1.80 g

At first half life = 1.80 g/2 = 0.9 g

At 2nd half life = 0.9 g/2 = 0.45 g

At 3rd half life = 0.45 g/2 = 0.225 g

Half life:

Half life = Time elapsed / number of half lives

Half life = 5.49 sec / 3

Half life = 1.83 sec

Answer:o

Explanation:

no

A covalent bond is the exact number of bonded pairs of electrons in a compound

One electron is added by each atom to a pair of shared electrons in a single bond. While double bonds share only one pair of electrons, triple bonds share three pairs. Bonds with multiple covalent bonds exchange several electron pairs

Covalent bonding happens when atoms share electron pairs. Atoms join together through covalent bonds to form a full electron shell, which boosts stability. By sharing their outermost (valence) electrons, atoms can fill out their outer electron shell and become stable. Nonmetals will swiftly create covalent bonds with other nonmetals in order to achieve stability.

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For neutralization in a titration of 35.00 mL of 0.737 M H₂SO₄, 62.4 mL of a 0.827 M KOH solution is needed.

H₂SO₄ + 2 KOH ---> K₂SO₄+ 2 H₂O

from the concentration equation

m1 n1 v1 = m2 n2 v2  ( since m = molarity , n = factor and v = volume)

M1 = 0.737 M

n1 = 2

V1 = 35 mL

M2 = 0.827 M

n2 = 1

V2 = ??

0.737 m x 2 x 35 mL = 0.827 m x 1 x v2

v2 =62.4

Hence, 62.4 mL of a 0.827 M KOH solution is needed for neutralization.

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The given cell notation "Mn(s)|Mn²⁺(aq)||Cd²⁺(aq)|Cd(s)" represents an electrochemical cell with the following half-cell reactions: At the anode (left side): Mn(s) → Mn²⁺(aq) + 2e⁻, At the cathode (right side): Cd²⁺(aq) + 2e⁻ → Cd(s)

In the overall balanced equation, we can combine these two half-cell reactions:

Mn(s) + Cd²⁺(aq) → Mn²⁺(aq) + Cd(s)

The physical state of each reactant and product can be included as follows:

Solid manganese (Mn) is the anode (left side), represented as "Mn(s)".

Aqueous manganese(II) ion (Mn²⁺) is in solution, represented as "Mn²⁺(aq)".

Aqueous cadmium(II) ion (Cd²⁺) is in solution, represented as "Cd²⁺(aq)".

Solid cadmium (Cd) is the cathode (right side), represented as "Cd(s)".

The balanced equation for the given cell notation is:

Mn(s) + Cd²⁺(aq) → Mn²⁺(aq) + Cd(s)

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Answer:

Ahhh! I had the same question

Explanation:

Answer:

The growing human population is putting increasing demands on natural resources.

Explanation:

In an ecosystem, the most important reason for people to carefully manage natural resources is that the  growing human population is putting increasing demands on natural resources.

Ecosystem is defined as a system which consists of all living organisms and the physical components with which the living beings interact. The abiotic and biotic components are linked to each other through nutrient cycles and flow of energy.

Energy enters the ecosystem through the process of photosynthesis .Animals play an important role in transfer of energy as they feed on each other.As a result of this transfer of matter and energy takes place through the system .Living organisms also influence the quantity of biomass present.By decomposition of dead plants and animals by microbes nutrients are released back in to the soil.

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When snow on a mountain breaks loose, resulting in an avalanche, several forms of energy are involved in the process. Initially, potential energy is stored in the snowpack due to its elevated position on the mountain slope. This potential energy arises from the gravitational force acting on the snow particles.

As the snow begins to slide downhill, this potential energy is converted into kinetic energy. The force of gravity accelerates the snow particles, increasing their velocity as they descend. This kinetic energy is proportional to the mass of the snow and its velocity.

Additionally, during an avalanche, there can be significant amounts of mechanical energy involved. As the snow slides down the mountain, it interacts with the terrain, breaking apart, colliding with obstacles, and causing frictional forces. These mechanical interactions result in the conversion of kinetic energy into heat and sound energy.

In summary, the energy transformation during an avalanche involves the conversion of potential energy into kinetic energy, as well as the conversion of kinetic energy into heat and sound energy through mechanical interactions. This interplay of various forms of energy contributes to the destructive force and intensity of an avalanche.

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Answer:

the answer on acellus is 2, 3 , 2

Answer:

Diffusion and Dispersion.

Explanation:

The two processes that took place in the given experiment are Diffusion and Dispersion.

When a crystal of potassium magnet is added placed in the bottom of a beaker which contains cold water, after 5 minutes the particles of potassium magnet will diffuse with water through diffusion process and the colour of water turns purple.

After few hours, the colour of solution goes light purple because the tiny particles which were diffused earlier will dispersed in the water and the particles will spread and make the solution lighter in colour.

Hence, the two processes are Diffusion and Dispersion.

When potassium permanganate (KMnO4) oxidize bromide ions (Br-) in an aqueous solution, it produces a new form of bromine called bromine water (Br2(aq)). Bromine water is a pale yellow solution that contains diatomic bromine molecules (Br2). The reaction can be represented by the following chemical equation:

2KMnO4 + 6H2O + 10Br- → 2MnO2 + 2KOH + 3Br2 + 8H+

The reaction involves the transfer of electrons from bromide ions to the manganese atoms in KMnO4, causing the oxidation of Br- to Br2.

Now, coming to the second part of your question, non-polar mineral oil is not a suitable solvent for bromine water or bromide ions as they are both polar substances. However, if we consider the solubility of Br- and Br2 in non-polar solvents, Br2 would be more soluble in non-polar mineral oil due to its non-polar nature. Bromide ions, on the other hand, are polar and would not dissolve readily in non-polar solvents. In general, polar substances dissolve in polar solvents, while non-polar substances dissolve in non-polar solvents.

In conclusion, when KMnO4 oxidizes Br-, it produces bromine water (Br2(aq)). If we consider the solubility of Br2 and Br- in non-polar mineral oil, Br2 would be more soluble due to its non-polar nature.

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Denatured alcohol and isopropyl alcohol are as similar as they as different. They are both used for cleaning and harmful to people if ingested. But isopropyl seems to be more effective than denatured alcohol. Denatured alcohol has been found to be more toxic and can harm our skin. But when it comes to cleaning, denatured alcohol can be used, but should not be used over isopropyl as it can leave behind residue, especially when it comes to electronic devices. Isopropyl, especially 70%, is more effective because it has more water, which can help it dissolve more slowly, penetrate cells, and kill bacteria.

Answer:

overflow the top edge of the filter paper

The formula for the compound made between gold (Au) with a +1 charge and sulfur (S) is Au(I) S

Gold is called as aurum in latin and hence the symbol Au it is an transition metal and therefore shows transition oxidation states and the +1 oxidation state is written as gold(I) is called as aurous in compound and while +3 state written as (III) is called as auric in compound and gold is chemical element with symbol Au and atomic number is 79 and classified as a transition metal and gold is a solid at room temprature

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Answer: D 25 degrees

Explanation: The reason because is 25x4=100 and slightly tilted =1/4 of the earth which is 25

Answer : C. A hydrogen bond

Explanation:

Answer:

A. covalent bond

Explanation:

dipole-dipole interaction results from difference in electronegativity , eg H-F where Fluorine has strong electronegativity but Hydrogen has less electronegativity. hence the bond has dipole moment towards F atom.

Answer:

Group 7A

Explanation:

The group 7A elements consists of the most reactive non-metals on the periodic table.

This group is known as the group of halogens. They consist of element fluorine, chlorine, bromine, iodine and astatine.

The reaction order with respect to ClO2 and OH- needs to be determined experimentally. Assuming a first-order dependence on both reactants, the rate law for the reaction is rate = k[ClO_2][OH-]. To obtain the value of the rate constant, k, experiments must be performed to measure the reaction rate at different concentrations of ClO_2 and OH-, and the data can be used to calculate k.

To determine the reaction order with respect to ClO_2 and OH-, we need to conduct a series of experiments and analyze the rate of the reaction under different concentrations of these reactants. Let's denote the reaction as:

2 ClO_2 + 2 OH- → ClO_3- + ClO_2- + H_2O

(1) Reaction order with respect to ClO_2: To determine the reaction order with respect to ClO_2, we can keep the concentration of OH- constant and vary the concentration of ClO_2 while measuring the reaction rate. If the rate of the reaction changes by a factor of x when the concentration of ClO_2 changes by a factor of y, then the reaction order with respect to ClO_2 is y.

(2) Reaction order with respect to OH-: Similarly, we can keep the concentration of ClO_2 constant and vary the concentration of OH-. By observing how the rate of the reaction changes with the concentration of OH-, we can determine the reaction order with respect to OH-.

(3) Rate law: Based on the experimental results, let's assume that the reaction is first order with respect to ClO_2 and first order with respect to OH-. The rate law for the reaction can be written as:

rate = k[ClO_2][OH-]

(4) Determining the value of the rate constant, k: To determine the value of the rate constant, k, we need to conduct experiments where the reaction rate is measured at different concentrations of ClO_2 and OH-. By substituting the experimental data into the rate law equation and solving for k, we can determine its value.

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Answer: In equation of reaction nitrogen N2 is formed instead of O2

Formula of nitroglycerin is C3H5(NO3)3

Number for N2 is 12. Thus one mole nitroglycerin produces 3 moles N2

Explanation:

A mass of about 53.6 g of platinum could be deposited on the electrode. The mass of platinum that can be plated on an electrode from electrolysis depends on various factors such as the amount of electric charge passed and the efficiency of the electrolytic process.

To calculate the mass of platinum plated on an electrode during electrolysis, we can use the equation:

Mass of platinum = (Current × Time × Atomic mass of platinum) / (1 Faraday)

First, let's calculate the charge passed during electrolysis using Faraday's law:

Charge = Current × Time

Charge = 500 A × 55.0 s

Next, we need to calculate the mass of platinum using the formula:

\(\[\text{Mass of platinum} = \frac{\text{Charge} \times \text{Atomic mass of platinum}}{1 \, \text{Faraday}}\]\)

\(\[\text{Mass of platinum} = \frac{{500 \, \text{A} \times 55.0 \, \text{s} \times 195.1 \, \text{g/mol}}}{{96485 \, \text{C/mol}}}\]\)

Now, let's calculate the mass:

Mass of platinum = 53.6 g

Therefore, the mass of platinum that could be plated on the electrode is approximately 53.6 g.

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Complete question :

What mass of platinum could be plated on an electrode from the electrolysis of a Pt(NO₃)₂ solution with a current of 500. A for 55.0 s? The molar mass of platinum is 195.1 g.mol-1 O 27.8 9 45.5 g 53.6 g 91.09

After adjusting for formal charges in SOCl₂,  types of orbitals are predicted to lie around the sulfur atom by the valence bond theory is the 4sp³ hybrid orbital and one delocalized orbital.

In the SOCl₂ , the formal charges are given as :

The formal charge on the S = 6-8/2 - 2 = 0

The formal charge on the O = 6 - 4/2 - 4 = 0

The formal charge on the Cl = 7 - 2/2 -6 = 0

The lone pair on S = 1 pair

The lone pair of O = 2 pair

The lone pair of Cl = 3 pair
The number of hybrid orbital is 4sp³ hybrid and the hybridization is sp³ hybridization.

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