a proton is created in the electron transport chain where protons move from the to the through an enzyme called where is made.

Answer:

Volume of solution is 0.88 L.

Explanation:

Given data:

Molarity of solution = 0.750 M

Mass of KNO₃ = 67.0 g

Volume of solution = ?

Solution:

Molarity is used to describe the concentration of solution. It tells how many moles are dissolve in per litter of solution.

Formula:

Molarity = number of moles of solute / L of solution

Now we will calculate the number of moles.

Number of moles = mass/molar mass

Number of moles = 67.0 g/ 101.1 g/mol

Number of moles = 0.66 mol

Now we will put the values in molarity formula.

0.750 M = 0.66 mol / L of solution

L of solution  = 0.66 mol / 0.750 M

L of solution  = 0.88 L

Volume of solution is 0.88 L.

The body contains organ systems that interact with each other to carry out all necessary functions for survival and growth are digestive , respiratory , circulatory system.

The body contains organs system that interact with each other to carry out all necessary functions for survival and growth are digestive system , respiratory system and circulatory system. They are involved in breakdown and transport of food and the transport of oxygen throughout the body to cell. where they are used up as energy , growth and repair.

Thus, The body contains organ systems that interact with each other to carry out all necessary functions for survival and growth are digestive , respiratory , circulatory system.

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Answer:

16128 J

Explanation:

Data:

Wanted:

Solution:

Note:

The answer is not in a correct significant figure. So, make sure you have a correct significant figure.

Answer:

0.0878 moles CaCl₂

Explanation:

To find the amount of moles of CaCl₂, you need to

(1) convert the volume from mL to L (1,000 mL = 1 L)

(2) calculate the amount of moles (M = moles / L)

It is important to arrange the conversions in a way that allows for the cancellation of units.

(Step 1)
   

  42 mL CaCl₂                    1 L
------------------------  x  ----------------------  =  0.042 L CaCl₂
                                       1,000 mL

(Step 2)

Molarity (M) = moles / volume (L)                <----- Molarity ratio

2.09 M = moles / 0.042 L                            <----- Insert values

0.0878 = moles                                           <----- Multiply both sides by 0.042 L

Answer:

32.6 kj

Explanation:

Answer:

the answer is d

Answer:

D

Explanation:

Because they are many different types of chemicals some are dangerous but some are applicable to use . chemicals help to wash germs away so we can live in a healthy environment.

try and find a better answer or ask ur teacher please

Answer:

Two positive aspects of using methane recapture systems are able to generate significant electricity. Another benefit is that the process of anaerobic digestion creates heat that can be used to warm buildings where animals are kept

Answer:  The correct answer is;

Two positive aspects of using methane recapture systems include lowering the impact on greenhouse gasses and the production of energy. Methane is a very potent greenhouse gas that is contributing to global warming. As a result, the recapturing process reduces the methane impacts of global warming by reclaiming and reusing the gas for other purposes. Recaptured methane can be stored and used to generate electricity or used as fuel to power updated vehicles and other engines on the farm. The overall benefits from this combination are reducing impacts causing global warming and lower the cost of electricity or fuel on the farm.

Explanation:  This answer has been confirmed correct.

Answer:

I believe the correct answer is cold surfaces.

Explanation:

Answer:

C

Explanation:

Answer: CH3COO)2Mg + H2SO4 = MgSO4 + CH3COOH

Explanation:

Hope. This helps

There will be 0.4589 mL of ethyl acetate left in the space after evaporation.

The conversion of a liquid substance into a gas is known as evaporation. As a result of the liquid absorbing energy from its surroundings, molecules begin to travel faster and faster until they finally become a vapour and escape into the environment. Usually, the energy is absorbed as heat, but it can also be in the form of light or electricity.

No, the ethyl acetate won't all evaporate. The amount of ethyl acetate that will stay in the space after evaporation can be determined using the ideal gas law. As per the ideal gas law, PV = nRT

P is the overall system pressure, V is the room's volume, n is the amount of ethyl acetate in moles, R is the ideal gas constant, and T is the temperature.

To solve for n, the quantity of moles of ethyl acetate, we can rearrange the equation as follows: n = PV/RT

When the values are plugged in, we get:

n = (94.9 torr)(7.25 m x 2.75 m x 2.75 m)/(8.314 J/K mol)(298 K)

\(n = 4.666 \times 10^{-3} mol\)

The molar mass of ethyl acetate (88.11 g/mol) can then be used to compute the mass of ethyl acetate:

Mass = \(n \times M = (4.666 x 10^{-3} mol)(88.11 g/mol)\) = 0.4125 g

Using the density of ethyl acetate (0.901 g/mL), it is possible to determine the volume of the liquid that is still present:

Volume = mass/density = (0.4125 g)/(0.901 g/mL) = 0.4589 mL

As a result, there will be 0.4589 mL of ethyl acetate left in the space after evaporation.

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Answer:

18.4g

Explanation:

Given parameters:

Percentage composition:

49.47%  carbon

5.19% H

28.8% N

16.48% O

Mass of caffeine   = 37.1g

Unknown:

Mass of carbon  = ?

Solution:

To find the mass of the carbon:

  Mass of carbon = percentage composition of carbon x mass of caffeine

 Mass of carbon  = 49.47% x 37.1  = 18.4g

Answer:

By adding heat energy It became a gas Explanation:The molecules moving about another is a clear indicator that the substance is a liquid. In a liquid, the molecules stick together and move about one another. When the scientist increase the speed of the of substance, the kinetic energy increases. if this increase causes a phase change, then the substance becomes a gas. So, by adding heat energy a substance becomes gaseous if it is a liquid already.

Explanation:

The de Broglie wavelength of the neutron moving at a velocity of 7.11×10⁶ m/s is 5.56×10¯¹⁴ m

λ = h /mv

Where

The following data were obtained from the question:

The de Broglie wavelength can be obtained as follow:

λ = h /mv

λ = 6.626×10¯³⁴ / (1.676×10⁻²⁷ × 7.11×10⁶)

λ = 5.56×10¯¹⁴ m

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Answer:The law of conservation of energy

Explanation:

states that the total energy is constant in any process. Energy may change in form or be transferred from one system to another, but the total remains the same.

Answer:

6000N

Explanation:

f= ma

f= 2000kg×3mls2

f=6000N

Answer:

6000 N

Explanation:

Given,

Mass= 2000 kg

Acceleration= 3 m/s²

Force= ?

Force= mass* acceleration

Force= 2000* 3 = 6000 N

Therefore, the force possessed by the car is 6000 N

Answer:

a person or persons murder

Answer: the aerodynamics of hummingbird wings.

Explanation: i got it right

The atomic mass of element A, given that the first isotope has abundance of 18.18% and a mass of 147.99, is 131.43 amu

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

The atomic mass of the element A can be obtain as illustrated below:

Atomic mass = [(Mass of 1st × 1st%) / 100] + [(Mass of 2nd × 2nd%) / 100]

Inputting the given parameters, we have:

Atomic mass = [(147.99 × 18.18) / 100] + [(127.76 × 81.82) / 100]

Atomic mass = 26.90 + 104.53

Atomic mass = 131.43 amu

Thus, the atomic mass of element A obtained from the above calaculation is 131.43 amu

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Like charges repel each other, while opposite charges attract each other. This principle is one of the fundamental aspects of electrostatics. According to Coulomb's law, the force between two charged particles is directly proportional to the product of their charges and inversely proportional to the square of the distance between them.

As the distance between two charged particles decreases, the force between them increases. This is because the closer the particles are, the stronger the electric field they create, leading to a stronger force of interaction.

On the other hand, as the magnitude of the charges decreases, the force between the particles also decreases. This is because the force is directly proportional to the product of the charges. If one or both of the charges are smaller, the force they exert on each other will be weaker.

In summary, according to Coulomb's law, decreasing the distance between charged particles increases the force between them, while decreasing the magnitude of the charges decreases the force. This understanding of the relationship between charge, distance, and force is crucial in explaining the behavior of charged particles and the interactions between them.

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Answer:

An unknown being weighed is hygroscopic. - operative error

One component of a mixture being analyzed quantitatively by gas chromatography reacts with the column packing. - methodic error

The tip of the pipet used in the analysis is broken. - instrumental error

In measuring the same peak heights of a chromatogram, two technicians each report different heights - operative error

Explanation:

In chemical analysis, operative errors are that largely introduced into the measurement because of variation of personal judgements of analysts. It is also a personal error that emanates solely due to the analyst.

A methodic error arises as a result of adopting defective experimental methods. For example, a column packing that reacts with a component of the mixture is used in the gas chromatography.

Instrument error refers to the error of a measuring instrument, for instance, the use of a pipette with a broken tip.

Because of their different longitude.

Tthe initial temperature of the polystyrene sample is 39.4°C.

Given: Mass of polystyrene sample = 54.2 gSpecific heat of polystyrene = 1.880 J-g°CWater mass = 100.0 g Initial water temperature = 21.0°CWater final temperature = 34.3°CPressure remains constant at 1 atmFormula used:Heat gained by water = heat lost by polystyreneHence,Heat lost by polystyrene = Heat gained by water=> mcΔT = mcΔTwhere,m = mass of polystyrene or waterc = specific heat capacityΔT = change in temperatureThe temperature change is ΔT = 34.3°C - 21.0°C = 13.3°CNow we can use this temperature change to calculate the initial temperature of the polystyrene.Taking the water's specific heat capacity, c = 4.184 J/g°CHeat gained by water = (100.0 g)(4.184 J/g°C)(13.3°C) = 5574 JHeat lost by polystyrene = 5574 JTaking the polystyrene's specific heat capacity, c = 1.880 J/g° ) = 13.3°C Now let's calculate the mass of polystyrene using the specific heat capacity formula.5574 J = (54.2 g)(1.880 J/g°C)(13.3°C - Ti)Ti = 39.4°C

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Answer: The change in time for the first quarter is  1.39 seconds.

The change in time for the second quarter is 0.78 seconds.

The change in time for the third quarter is 0.64 seconds.

The change in time for the fourth quarter is 0.54 seconds.  

Explanation: took info from my data and completed lab

Step 5: Measure the Speed of the Toy Car on the Higher Track

Calculate the change in time for each quarter of the track. Record the change in time in Table E of your Student Guide.

Also added the other calculations -

Calculate the average time the car took to reach each checkpoint. Record the average time in Table D of your Student Guide.

The average time to the first quarter checkpoint is 1.39 seconds.  

The average time to the second quarter checkpoint is 2.18 seconds.

The average time to the third quarter checkpoint is 2.82 seconds.

The average time to the finish line is 3.36 seconds.

Calculate the speed of the car at each checkpoint by dividing the distance between each checkpoint, in meters, by the change in time. Record your answers in Table E of your Student Guide.

The speed at the first quarter checkpoint is 1.09 m/s.  

The speed at the second quarter checkpoint is 1.95 m/s.

The speed at the third quarter checkpoint is 2.37 m/s.

The speed at the finish line is 2.80 m/s.

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Answer:

Question (a):

Answer: 2:8:7

Explanation: Chlorine, Cl is in period 3 hence two energy levels [ 2:8:_]. Chlorine is in group IV (halogen) hence it has 7 outermost energy level electrons. Hence deducing 2:8:7

Question (b)

» (i): Carbon and silicon [ C and Si ]

A group is a column in a periodic table

» (ii): Silicon and Chlorine [ Si and Cl ]

A period is a row in a periodic table

» (iii): Hydrogen and Chlorine [ H and Cl ]

It forms hydrogen chloride gas. When this gas is passed on warm water or steam, hydrochloric acid is formed.

» (iv): Chlorine [ Cl ]

An element has electron number equivalent to group number. Group I elements have one electron, Group ii elements have two electrons and so on.

Helium is in group Viii but in period 1, so it has eight electrons.

But chlorine has seven outermost electrons but since it is in period 3, its electrons are 8 + 7 = 15 electrons.

» (v): Chlorine [ Cl ]

Chlorine only lacks one electron to become full and stable. So it is assigned by Cl- (-1)

Biotechnology is the use of living organisms or other biological systems in the manufacture of drugs or other products or for environmental management, as in waste recycling: includes the use of bioreactors in manufacturing, microorganisms to degrade oil slicks or organic waste, genetically engineered bacteria to produce human hormones, and monoclonal antibodies to identify antigens.

Biotech offers the possibility of improving human health, the environment, and agriculture while creating more sustainable modes of production.

To solve this problem, we can use the combined gas law, which states that the ratio of initial pressure, volume, and temperature is equal to the ratio of final pressure, volume, and temperature. The formula is as follows:

(P₁ * V₁) / T₁ = (P₂ * V₂) / T₂

Given:

Initial volume (V₁) = 447 mL

Initial temperature (T₁) = 106 ºC

Final volume (V₂) = 227 mL

We need to find the final temperature (T₂). Let's assume the initial and final pressures are constant, so we can ignore them.

Now, we can plug in the values into the formula:

(447 mL * T₂) / (106 ºC) = (227 mL * T₁) / (106 ºC)

Simplifying the equation:

447 mL * T₂ = 227 mL * 106 ºC

T₂ = (227 mL * 106 ºC) / 447 mL

T₂ ≈ 54 ºC

Therefore, the final temperature of the gas is approximately 54 ºC.

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Based in the data provided, the percentage by mass of K2SO4 is 60.55 %.

The mass of K2SO4 in the mixture is obtained from the data given as follows:

Total mass of sample = 0.649 g

Let the mass of K2SO4 in the mixture be X g

Mass (NH4)SO4 = (0.649 - X )g

Moles of K2SO4 = X g/174.25 g/mol

= 0.00574X mol

Moles of (NH4)2SO4 = (0.649 - X)g / 132.13 g/mol

= (0.00491 - 0.00757X) mol

Total number of moles SO42- ions precipitated = 0.00574X mol + (0.00491 - 0.00757X)mol

= (0.00491-0.00183X) mol

Mole ratio of SO42- ions to Ba2+ ions = 1:1

Thus, moles of Ba2+ ions = (0.00491 - 0.00183X)mol

Moles of BaSO4 precipitated = 0.977 g/233.38 g/mol = 0.00419 moles

1 mole of BaSO4 produces 1 mole of Ba2+ ions

Therefore,

(0.00491 - 0.00183X) mol = 0.00419mol

0.00183X = 0.00491 - 0.00419mol

0.00183X = 0.00072

X = 0.00072/0.00183 = 0.393 g

Mass of K2SO4 = 0.393 g

Percentage by mass of K2SO4 = (0.393/0.649) × 100

Percentage by mass of K2SO4 = 60.55 %

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1. Sulfur dioxide, or SO2 , has two resonance structures which contribute equally to the overall hybrid structure of the molecule. However, a third Lewis structure can be drawn for SO2 which is more stable in theory, but doesn't quite match experimental data.

2.

\( \color{red} = \frac{No. \: of \: bonding \: electron \: pairs}{No. \: of \: bonded \: atoms} \)

\(In \: each \: resonance \: contributor, \\ there \: are \:  six \: bonding  \: electron \\ pairs \: and  \: four  \: atoms \: bonded \\ to \: the  \: SS  \: atom. \: Thus,\)

\(BO = \frac{6}{4} = 1.5

\)