taffi is majoring in chemical engineering. she often finds herself placed in stereotyped and restricted roles by her professors and fellow students, but in ways that seem superficially positive. what is taffi experiencing?

Answer:

C. and D. i think

Explanation:

Atomic mass is typically expressed as a decimal number, not a fraction. The atomic mass of an element represents the weighted average mass of all the naturally occurring isotopes of that element, taking into account their relative abundance.

The atomic mass of carbon-12 (C-12) is defined as exactly 12 atomic mass units (u).

The atomic masses of other elements are determined relative to the mass of carbon-12 using a scale based on the unified atomic mass unit (u).

Atomic mass is a relative quantity and is not necessarily a whole number for elements other than carbon-12. Most elements have multiple isotopes, which are atoms with different numbers of neutrons but the same number of protons.

These isotopes have different masses, and their relative abundances affect the atomic mass. Atomic mass can be less than 1, especially for elements with very light isotopes. For example, the atomic mass of hydrogen, the lightest element, is approximately 1.008 u, which is less than 1.

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The chemical formula of mentioned substances is as follows 1) SO₃ 2) K\(^+\) and NO₃\(^-\) 3) ΔH 4) Cu 5) Hg (l) 6)ZnCl₂.

Chemical  formula is a way of representing the number of atoms present in a compound or molecule.It is written with the help of symbols  of elements. It also makes use of brackets and subscripts.

Subscripts are used to denote number of atoms of each element and brackets indicate presence of group of atoms. Chemical formula does not contain words. Chemical formula in the simplest form  is called empirical formula.

It is not the same as structural formula and does not have any information regarding structure.It does not provide any information regarding structure of molecule as obtained in structural formula.

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This is because there would be a dilution of the solution if more of the water is added by increasing the pool.

The concentration of HOCl drops when the pH of the pool water rises (becomes more alkaline). This is due to the fact that HOCl reacts with the water's hydroxide ions (OH-), turning it into the less potent hypochlorite ion (OCl-), as the water gets more alkaline. Compared to HOCl, the hypochlorite ion is less effective as a disinfectant. As a result, the concentration of the more potent HOCl declines as the pH rises, decreasing the pool water's ability to disinfect itself.

On the other hand, the concentration of HOCl rises when the pH of the pool water decreases (pH becomes more acidic). HOCl is more likely to develop from the dissociation of chlorine-based compounds in acidic circumstances. The equilibrium between HOCl and OCl- changes in an acidic environment.

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Answer:

I`m pretty sure that B is right

Explanation:

The molarity of sodium hydroxide involved in the neutralization reaction is 0.251 M.

The molarity of a solution can be calculated using the following expression;

CaVa = CbVb

Where;

According to this, 43.8mL of sodium hydroxide reacts with 15.7 mL of 0.700M phosphoric acid. The molarity of sodium hydroxide can be calculated as follows:

0.700 × 15.7 = 43.8 × Cb

10.99 = 43.8Cb

Cb = 10.99 ÷ 43.8

Cb = 0.251 M

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The significance of polar and non-polar amino acids lies in their interactions within a protein structure. Polar amino acids are typically found on the surface of the protein, where they interact with water molecules and other polar molecules. Non-polar amino acids, on the other hand, are typically found in the interior of the protein, where they interact with other non-polar amino acids through hydrophobic interactions.

Amino acids are the building blocks of proteins, and they can be categorized as either polar or non-polar. Polar amino acids have a hydrophilic (water-loving) nature due to their polarity, while non-polar amino acids have a hydrophobic (water-fearing) nature due to their lack of polarity.

The balance between polar and non-polar amino acids is crucial in determining the overall structure and function of a protein. If there are too many polar amino acids in the interior of a protein, it may become unstable and unfold. Conversely, if there are too many non-polar amino acids on the surface of a protein, it may not be able to interact effectively with other molecules.

Overall, the significance of polar and non-polar amino acids lies in their ability to contribute to the stability and function of proteins. Understanding the properties of these amino acids is important in fields such as biochemistry and drug development.

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The types of energy are correctly matched below:

Thermal energy: Coal-fire power plant

Electrical energy: power plant

Sound energy: Radio

Chemical/potential energy:Coal

Energy conversion is also known as energy transformation whereby a type of energy changes to another form of energy.

There are various types of energy which includes:

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ANSWER

The initial volume of the acid is 260mL

EXPLANATION

Given that;

The final volume of the ethanoic acid is 4.5L

The final concentration of the ethanoic acid is 1.0 mol/L

The initial concentration of the ethanoic acid is 17.4 mol/L

Follow the steps below to find the volume of the ethanoic acid

Step 1; Apply the dilution formula

Step 2; Substitute the given data into the formula

Therefore, the initial volume of the acid is 260mL

Answer:

C

Explanation:

 i hope i helped you and have a nice day...

Shelly and Bob are skating on a rink. Bod tried pushing Shelly forward but he kept moving backwards

The Pureguardian 120-hour 2-gallon ultrasonic humidifier is a device that releases both warm and cool mist. It also comes with an aroma tray.

The Pureguardian 120-hour 2-gallon ultrasonic warm and cool mist humidifier with aroma tray is a humidifier that releases both cool and warm mist into the air. This device has a 2-gallon tank capacity that can provide up to 120 hours of continuous use. The ultrasonic technology it uses ensures that the mist is dispersed evenly throughout the room.The warm mist setting is useful during the winter months as it can provide warmth to the room.

The device also comes with an aroma tray, which can be used to add essential oils to the mist for added aromatherapy benefits. The Pureguardian humidifier also features Silver Clean Protection technology that helps to prevent the growth of mold and mildew in the tank.

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A buffer solution is defined as a solution that resists a change in pH when a small amount of acid or base is added to it. the buffer capacity of the solution will prevent the pH from changing too much.

The buffer solution containing nitrous acid, HNO2, and potassium nitrite, KNO2, will experience the following changes when a small amount of HClO4 is added to it: The HClO4 added to the buffer solution will react with the potassium nitrite, KNO2, to form the salt, KClO4.T

he HNO2 will be converted to nitric acid, HNO3, by the HClO4.The HNO3 formed in the previous step will react with the potassium nitrite, KNO2, to form nitric oxide, NO, and potassium nitrate, KNO3.The net effect of adding HClO4 to the buffer solution containing nitrous acid, HNO2, and potassium nitrite, KNO2, will be to shift the buffer solution to a more acidic pH range.

However, the buffer capacity of the solution will prevent the pH from changing too much.

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You would need to add 250 mL of water.

Use Charles' Law: V1/T1 = V2/T2. We assume the pressure and mass of the helium is constant. The units for temperature must be in Kelvin to use this equation (x °C = x + 273.15 K).

We want to solve for the new volume after the temperature is increased from 25 °C (298.15 K) to 55 °C (328.15 K). Since the volume and temperature of a gas at a constant pressure are directly proportional to each other, we should expect the new volume of the balloon to be greater than the initial 45 L.

Rearranging Charles' Law to solve for V2, we get V2 = V1T2/T1.  

(45 L)(328.15 K)/(298.15 K) = 49.5 ≈ 50 L (if we're considering sig figs).

ANSWER:

all of them

Explanation:

preciseness is measured by how many decimal places are used not by accuracy. since all of these are to the same decimal place they are all equally precise even if they are inaccurate.

Positive applications for allelotoxin is that it prevents plants from enduring any type of competition with other species.

This is the process in which a plant inhibits the growth of another through a secretion of a chemical which is referred to as allelotoxin.

This technique however reduces biodiversity which isn't ideal so as to prevent organisms from going extinct and also reduces adaptation or evolution due to the reduced or non growth of the plant species which are affected.

A common example is  the sorghum plant preventing of the growth of weeds thereby resulting in the most appropriate choices for the positive applications of allelotoxin.

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Answer:

friction and air resistance

at terminal velocity, the weight of the object due to gravity is balanced by the frictional forces, and the resultant force is zero.

A solution is defined as a mixture of two or more substances, usually, a solute and a solvent, and the difference between these two are in quantity, solute represents the smallest amount and solvent will represent the highest amount, and while you can have more than one solute, you can only have one solvent for a solution. Therefore the statement is true

Explanation:

There is a limit to different things we encounter around the universe due to a lot of reasons.

To overcome these barriers, some catalysts that are not readily available are needed. This reduces the combination of some atoms in nature.

This and many more reasons limits the combination of chemical substances.

There is a limit to different things we encounter around the universe due to a lot of reasons:

So, for a chemical reaction to occur there are certain parameters that need to taken into consideration for a chemical reaction to actually takes place.

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Answer:

75 Newton

Explanation:

In order to find the force of the object, you must remember that the equation N = (mass x acceleration). Therefore meaning you would divide 300 kilograms, the mass, by 4 meters per second (squared), the acceleration.

Stoichiometry is the study and calculation of quantitative (measurable) relationships of the reactants and products in chemical reactions (chemical equations).

QUESTION 18;

4 moles of ammonia reacts to produce 2 moles of nitrogen gas

0.68 moles of ammonia will produce 0.34 moles of nitrogen gas.

Mass of nitrogen gas = 0.34 moles × 34g/mol = 11.56g

QUESTION 19;

1 mole of zinc reacts with 2 moles of hydrochloric acid

34.5 grams of Zn is equivalent to 34.5/65.39 = 0.53 moles

0.53 moles will react with 1.06 moles of HCl.

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Answer:

because salt has a properties of disolving

In an ecosystem, based on the data in the graph the current carbon

dioxide levels are  far higher than the highest natural levels..

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 system 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.

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Resonance is known as the property of some molecules or ions to simultaneously exhibit the characteristics of many bond structures while being unable to be represented by a single Lewis structure.

Resonance structures are a grouping of two or more Lewis structures that together represent the electronic bonding of a single polyatomic species, including fractional bonds and charges.

The Fractional Bonds are unsecured, limited recourse debt securities produced by Wise Alpha plc. Wise Alpha plc has issued a fractional bond, an asset-backed debt instrument. Through a succession of fractional bonds, the financial gains and capital repayments of a certain underlying bond are fully passed through.

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The number of moles of AgCl formed in this reaction is also 0.0125 moles. This is because the reaction is a 1:1 stoichiometric ratio, which means that the amount of AgCl formed is directly proportional to the amount of AgNO3 that reacted.

The balanced chemical equation shows that for every 2 moles of AgNO3 that react, 2 moles of AgCl are formed.

Therefore, the number of moles of AgCl formed can be determined using stoichiometry based on the moles of AgNO3 that reacted. Since we determined in a previous step that 0.0125 moles of AgNO3 react, we can use this value in our stoichiometric calculation. From the balanced equation, we know that 2 moles of AgNO3 react with 2 moles of AgCl. This means that for every 2 moles of AgNO3 that react, 2 moles of AgCl are formed. Therefore, the number of moles of AgCl formed in this reaction is also 0.0125 moles. This is because the reaction is a 1:1 stoichiometric ratio, which means that the amount of AgCl formed is directly proportional to the amount of AgNO3 that reacted.

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Answer:

it helps bring energy to earth

The total mass of 4 tin is in grams is 580 grams and in kg is 0.58kg.

One tin of chopped tomatoes weight is 145 grams

and we have to calculate it for 4

so for 4

145*4 =580 grams

and we have to change it into kilograms so

580 /1000  = .58kg

By 1,000, divide the number of grams.

To convert from grams to kilograms, simply divide by 1,000 because there are 1,000 grams in every kilogram. If necessary, construct the equation using fractions. Put the number of grams over 1 and divide it by the conversion factor, which is 1 kg / 1,000 g. Your answer in kilograms will result from the cancellation of the grams. Remember to use the appropriate units to mark your response.

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