Which of the following is an easy and sustainable way for campuses to reduce waste?

a. recycling bins
b. canals for dumping waste
c. Incinerators for garbage
d. outsource to companies that specialize in recycling

Molarity of KMNO4  = 4.94*10^-3 M

Determination of the concentration/molarity of the KMnO4 solution by titrating it with a standard ammonium sulfate solution. (Molar mass of FeSO4(NH4)2SO4 . 6H2O = 392 g mol–1). (i) Weigh 4.9000 g of ferrous ammonium sulfate and transfer through a funnel to a 250 mL volumetric flask.

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Answer:

A I think

Explanation:

im not sure so do with that what you will

Answer:

D atom

Explanation:

Answer:

Used to make animal Feed

Explanation:

Answer

3.075 g Fe²⁺

Procedure

The formula of iron (II) sulfite is FeS, to get the grams of Fe²⁺ present, we need to determine the ratio of the elements that form the molecule.

Fe = 55.845 g/mol

S = 32.065 g/mol

FeS = 55.845 g/mol + 32.065 g/mol = 87.91 g/mol

Ratio Fe = 55.845/87.91= 0.6353

Ratio S= 32.065/89.91 = 0.3647

Grams of Fe²⁺ = 4.84 (0.6353) = 3.075 g Fe²⁺

Answer:

59

Explanation:

The net ionic chemical equation for the reaction that occurs within this buffer solution when HCl (aq) is added is: \(CH_{3}COO^{-}\) (aq) + \(H^{+}\) (aq) → \(CH_{3}COOH\) (aq).

To write the net ionic chemical equation for the reaction that occurs within the buffer solution containing 0.10M acetic acid and 0.10M sodium acetate when HCl (aq) is added, follow these steps:

1. Write the molecular equation:
 \(CH_{3}COOH\) (aq) + \(NaCH_{3}COO\) (aq) + HCl (aq) →  \(CH_{3}COOH\) (aq) + NaCl (aq) + H2O (l)

2. Write the complete ionic equation:
\(CH_{3}COOH\) (aq) + Na+ (aq) + \(CH_{3}COO^{-}\) (aq) + H+ (aq) + Cl- (aq) →  \(CH_{3}COOH\) (aq) + Na+ (aq) + Cl- (aq) + \(H_{2}O\) (l)

3. Identify spectator ions:
  Na+ (aq) and Cl- (aq) are spectator ions as they do not change in the reaction.

4. Remove the spectator ions to obtain the net ionic equation:
\(CH_{3}COO^{-}\) (aq) + \(H^{+}\)  (aq) →  \(CH_{3}COOH\) (aq)

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To estimate the likelihood of a catastrophic wildfire, meteorologists utilize meteorological data. To forecast the likelihood of wildfires under several possible climatic scenarios, scientists develop computer models. Scientists forecast where and when wildfires are most likely to occur using various estimates of temperature and precipitation.

Other widely utilized technologies by many authorities and sectors to monitor and identify wildfire outbreaks include terrestrial, aerial, and satellite remote sensing systems as well as IoT-based solutions. To actively search the terrain for fresh flames, terrestrial camera systems have been implemented in numerous areas.

Even though it is not always feasible to identify the particular cause or spark of a fire occurrence, wildfire risk may be roughly calculated by comprehending how climate, geography, weather, and land cover affect fire behavior and the possibility of a fire spreading.

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It is true that a redox reaction is the electrochemical cell's overall chemical outcome. An electrochemical cell is made up of two half-cells connected by an external circuit: an anode (where oxidation takes place) and a cathode (where reduction takes place).

The movement of electrons from the anode to the cathode through the external circuit causes the redox reaction to happen.

Oxidation, in which a species loses electrons and is oxidized, occurs at the anode half-cell. This causes the release of positively charged ions (cations) into the solution.

Reduction occurs in the cathode half-cell, where a species acquires electrons and is reduced. This causes the amount of positively charged ions (cations) in the solution to decrease.

In its entirety, the process involves moving electrons from the anode to the cathode, which is made possible by the current flowing through the external circuit. To balance the charge, the electrolyte's ions move in tandem with this transfer of electrons. To keep the cell's charge neutrality, the redox reaction happens simultaneously at the anode and the cathode.

Because both oxidation and reduction reactions take place concurrently at the anode and cathode, respectively, the net chemical outcome of an electrochemical cell is therefore a redox reaction.

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Answer:

Conservation of resources. Saving energy and helping reduce carbon emission.

Explanation:

Examining population size, density, and distribution together give you a better understanding of a population than looking at these characteristics separately because these variables play a role in how the ecosystem adjusts to the growing population.

What is population density, and how does it work?

The average population size per unit of area or volume is known as population density. A colony of 100 insects, for instance, has a density of 1 insect per square meter and occupies an area of 100 square meters.

Numerous creatures' location, development, and migration can all be described using population density. The share of residents by different regions of a country is known as the national population distribution. The quantity of people within a broadly defined geographic area is referred to as the population size.

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The stoichiometric coefficient, the number that comes before the chemical formula, means how much of this compound you have. So the question is correct, it means two molecules of H2.

Answer: Alternativa "A" True

Answer:

See explanation

Explanation:

The thermal energy of a substance is affected both by its mass and by its temperature. Thermal energy is defined as the total kinetic energy of all particles in an object.

Even though the cup of water has a higher temperature, the bathtub has more thermal energy because it contains much more mass of water compared to the cup. It will release more thermal energy to the surroundings compared to the cup of boiling water.

The bathtub of warm water has a higher total thermal energy due to its bigger volume, but the cup of boiling water has a higher average kinetic energy per particle.

The thermal energy of a cup of boiling water is greater than that of a warm bathtub. The sum of all the kinetic energies of the particles in a substance is its thermal energy. The temperature of boiling water is higher than that of warm bathwater. The average kinetic energy of the particles is measured by temperature. The average kinetic energy of the particles in a cup of boiling water would be higher than that of the warm water in a bathtub, which is normally between 38 and 45 degrees Celsius (100 and 113 degrees Fahrenheit), because water has a boiling temperature of 100 degrees Celsius (212 degrees Fahrenheit).

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The result table indicate that A. The solute is a SOLID because it has a DECREASE in the amount dissolved as temperature decreases.

The solubility of a solid solute in a liquid solvent generally decreases as the temperature decreases. This is because the kinetic energy of the solute molecules decreases as the temperature decreases. As the kinetic energy of the solute molecules decreases, they are less likely to have enough energy to escape from the solution and enter the gas phase.

In the table, as the temperature decreases, the concentration of the solute in the solution decreases. This indicates that the solute is a solid and that the solubility of the solute decreases as the temperature decreases.

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The given block diagram can be reduced to a single block, {T}(\mathrm{s})=\mathrm{C}(\mathrm{s}) /{R}(\mathrm{s}), representing the transfer function.

In a block diagram, blocks represent mathematical operations or transformations, and the arrows indicate the flow of signals. To reduce the given block diagram to a single block, we need to simplify the interconnected blocks and determine the overall transfer function.

The block diagram represents a system with an input signal R(s) and an output signal C(s). The transfer function T(s) represents the relationship between the output C(s) and the input R(s) in the Laplace domain.

To simplify the diagram, we combine the blocks in a way that reflects their overall effect on the input-output relationship. In this case, since we have a single block diagram and the transfer function is already defined as C(s)/R(s), the diagram is already in its simplest form.

Therefore, the single block {T}(s) = C(s)/R(s) represents the overall transfer function of the system, where C(s) is the Laplace transform of the output signal and R(s) is the Laplace transform of the input signal. This single block captures the relationship between the input and output signals in the system.

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There are 24 valance electrons in the compound.

We know that the valence electrons are those that are found on the valence shell of an atom. There are four atoms that can be seen in the compound that is under consideration. The atoms are selenium, bromine (2 atoms) and oxygen.

Given that there are seven valence electrons in bromine and six valence electrons in oxygen and selenium. We have;

2(7 electrons of bromine) + 6 electrons of oxygen + 4 electrons of Se

= 24 electrons

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Answer:

a. The mass of solute in the solution is 18.75 g.

b. The mass of solute in the solution is 575 g.

Answer:

5

Explanation:

Temperature calculates heat/the temperature in the specific location.

In a vacuum, all colors (frequencies) of light travel at the same speed, known as the speed of light (c), which is approximately 299,792 kilometers per second (km/s) or 186,282 miles per second (mi/s). Light is an electromagnetic wave, and its speed is independent of its frequency or wavelength in a vacuum. This means that whether the light is red, green, blue, or any other color in the visible spectrum, it will always travel at the same constant speed in a vacuum.

The difference in the speed of light for various colors becomes noticeable when light passes through a medium other than a vacuum, such as air or water. In this case, the speed of light is affected by the refractive index of the medium. Different colors of light have different refractive indices, leading to different speeds and causing the phenomenon known as dispersion, which can be observed in a rainbow.

In summary, in a vacuum, all colors of light travel at the same constant speed, regardless of their frequency. It is only when light passes through a medium with a refractive index that the speed of various colors of light may differ.

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Answer:

V = 25.7 L.  

Explanation:

Hello there!

In this case, according to the given information, it turns out possible for us to solve for the volume of hydrogen, by firstly calculating the moles of this gas produced by 37.6 g of magnesium, according to the 1:1 mole ratio between them:

\(n_{H_2}=37.6gMg*\frac{1molMg}{24.305gMg}*\frac{1molH_2}{1molMg}=1.55molH_2\)

Now, we use the ideal gas equation:

\(PV=nRT\)

To solve for the volume, and obtain:

\(V=\frac{nRT}{P}\\\\V=\frac{1.55mol*0.08206\frac{atm*L}{mol*K}*293.15K}{1.45atm}\\\\V=25.7L\)

Regards!

Ques.1: Why do you think that you had to use a thin layer of onion skin, rather than a thick layer for the microscope?

Ans:- It is because, I the onion peel is thick layered, then it will be hard or impossible to see through the microscope.

Ques.2: When iodine reacts with starch, it produces a blue-black color. Starch is a white substance which plants use to store food. What structure did you see better because of the iodine? Why did you see this structure better?

Ans: Amylose in starch is responsible for the formation of a deep blue color in the presence of iodine. The iodine molecule slips inside of the amylose coil.

This makes a linear triiodide ion complex with is soluble that slips into the coil of the starch causing an intense blue-black color.

Due to this, we can see the structure better.

Ques.3: From low power to high power, what structures became clearer in the stained onion tissue?

Ans: From lower to higher power, we can see:-

-- Large, rectangular interlocking cells,

-- Clearly visible distinct cell walls surrounding the cells,

-- Dark stained nucleus,

-- Large vacuoles at the center,

-- Small granules may be observed inside the cells (within the cytoplasm)

Ques.4: What is the shape of an onion cell?

Ans: The shape of an onion cell is rectangular or square in shape.

The periodic table has changed very little since it was originally developed by Mendeleev and Meyer is referred to as a false statement.

This is defined as the arrangement of elements based on their atomic number in a tabular form. It consists of 18 vertical columns which re referred to as groups and seven horizontal rows called period.

Henry Moseley in 1913 organized Mendeleev's periodic table based on physical properties.This took into consideration their atomic number rather than atomic mass and other missing elements.

This is the periodic table which is used currently and therefore hasn't changed much which is why false was chosen.

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Answer:

Explanation: For example, pH 4 is ten times more acidic than pH 5 and 100 times (10 times 10) more acidic than pH 6. The same holds true for pH values above 7, each of which is ten times more alkaline (another way to say basic) than the next lower whole value.

HOPE THAT HELPS

The number of faradays involved is 0.044 faradays, which means that a total charge of 0.044 × 96500 C (or approximately 4250 C) has been drawn from the solar cell over the 180-day period.

To calculate the number of faradays involved, we need to use the formula that relates current, time, and charge. The formula is based on Faraday's law of electrolysis, which states that the amount of a substance produced at an electrode is proportional to the amount of electrical charge passed through it.

First, we need to find the total charge (in Coulombs) passed through the solar cell. To do this, we'll use the formula: Charge (Q) = Current (I) × Time (t). The given current is 40 × 10^-6 A, and we need to convert the time to seconds.
Convert 180 days to seconds: 180 days × 24 hours/day × 60 minutes/hour × 60 seconds/minute = 15,552,000 seconds.
Now, calculate the total charge: Q = (40 × 10^-6 A) × 15,552,000 seconds = 622,080 Coulombs.
To find the number of Faradays involved, divide the total charge by the charge of one Faraday (approximately 96,485 Coulombs/Faraday): 622,080 Coulombs / 96,485 Coulombs/Faraday ≈ 0.48 Faradays (rounded to 2 significant figures).

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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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Explanation:

red, blue, yellow, white, black,

these are the primary colors. when mixed together they create other colors.

Moving down a group or across a column or row in the modern periodic table, we can observe a lot of trends in the properties (physical and chemical) of elements in basic chemistry.

When two atoms are combined, then we can estimate their atomic size by checking the distance between the atoms.

            In general, the atomic radius decreases as we move from left to right in a period and it increases when we go down a group. This is because in periods the valence electrons are in the same outermost shell. The atomic number increases within the same period while moving from left to right which in turn increases the effective nuclear charge. The increase in attractive forces reduces the atomic radius of elements.

Potassium and Iron both are from period 4  group 1 and group 8 respectively and as we know when we go Left to right atomic size increase .  

Potassium come first and iron comes later in period 4 that's why atomic size of potassium is greater than that of iron despite of having 7 extra electron to iron.

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