Which is the dependent variable
Concentration or
Time ?

An additional damage of the pesticides is that they  have been washed into local sources of drinking water.

The pesticides are chemicals that could be used to prevent the growth of weeds on agricultural lands. We know that many of these pesticides have the ability to find their way into food grains and bioaccumulate in human systems.

These pesticides are equally able to poison the mammal populations that are in an area as well as to move along with surface water into the surrounding water bodies were they contaminate aquatic organisms.

Hence, an additional damage of the pesticides is that they  have been washed into local sources of drinking water.

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Yes, a reaction will occur if a piece of metallic tin(Sn) is placed with a piece of metallic Zn(Zinc).

To establish whether a reaction will take place or not, we use the reactivity series of metals.

The reactivity series of some metals is given in the adjoining image.

In this series, a higher placed element will react with a lower placed element.

As we can see from the series zinc is at a higher level as compared to tin, therefore it will react with tin.

Thus, a reaction will occur if a piece of metallic tin(Sn) is placed with a piece of metallic Zn(Zinc).

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Answer:

7.) 126.7 cm³

8.) 789 g

Explanation:

7.) To find the volume (cm³) of alcohol, you need to multiply the given mass (g) by the density. The denisty ratio represents grams of the alcohol per every 1 cm³. It is important to arrange the ratio in a way that allows for the cancellation of units (grams should be in the denominator). The final answer should have 4 sig figs to match the given value with the least amount of sig figs (100.0 grams).

 100.0 grams                  1 cm³
---------------------  x  ---------------------------  =  126.7 cm³
                                0.78945 grams

8.) This time, you are given the volume instead of the mass. The same process can be used in this problem, but you first need to convert liters (L) to cm³ to be able to use the denisty ratio. Once you find the volume in cm³, you can multiply it by the density to find the mass. Again, be sure to arrange the conversions in a way that allows for the cancellation of units. The final answer should have 3 sig figs to match the given value with the least amount of sig figs (1.00 L).

1 L = 1,000 cm³

  1.00 L           1,000 cm³           0.78945 g
-------------  x  -------------------  x  --------------------  =  789 g
                             1 L                     1 cm³

The element belongs to group 1A of the periodic table because it has only one electron in its 3s orbital.

Based on the electronic configuration, the element is a reducing agent.

Electronegativity is the ability of an atom of an element to attract electrons to itself.

A neutral atom that has high electronegativity will gain electrons to form an anion during ionic bond formation.

The electronic configuration of an element is the arrangement of the electrons found in the atom of the element in shells or orbitals around the nucleus.

Electronic configuration arranges the electrons in the atom of the element in increasing order of energy level.

Considering the given element with the electronic configuration shown below:

electronic configuration of element = 1s²2s²2p⁶3s¹

The element belongs to group 1A of the periodic table because it has only one electron in its 3s orbital, the valence orbital.

Based on the electronic configuration, the element is a good reducing agent.

Electronegativity is the ability of an atom of an element to attract electrons to itself.

A neutral atom that has high electronegativity will gain electrons to form a negative ion or anion  during ionic bond formation.

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Thank you !

Explanation:

hi I am not sure if you have any questions or if u pls I am looking to move to send the money is the best way for you have to sleep and see what is your account we have a great day and see if you have any questions or concerns please visit the plug-in settings to determine how attachments are handled the whole of abduan I m not sure if you have any of

The new rate constant is 1.5 * 10^6  M-1s-1 .

In this case we know that we have to use the Arrhenius equation to find the rate constant at two different temperatures by the use of the formula;

ln(k2/k1) = -Ea/R(1/T2 - 1/T1)

k2 = Rate constant at  436 K

k1 = Rate constant at 249 K

T1 = initial temperature

T2  = final temperature

R = Gas constant

Ea = activation energy

Hence;

ln(k2/1.60 × 10^2) = -38 * 10^3/8.314(1/436 - 1/249)

ln(k2/1.60 × 10^2) =  -38 * 10^3/8.314(0.002 - 0.004)

ln(k2/1.60 × 10^2) =  9.14

k2/1.60 × 10^2 = e^ 9.14

k2 = e^ 9.14 * 1.60 × 10^2

k2 = 1.5 * 10^6  M-1s-1

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Answer:

8 km

Explanation:

1 km=1000 m

8 km=

8 km * 1000m/1 km=8000m

8000m>80m

8km>80m

Answer:

This is element 8 which is Oxygen.

Oxygen has two shell

Where L = 2

M = 8

I. E. 8 - 2 =>6

.: it has 6 valence electrons with 0 unpaired electrons.

Answer:

Dissolving a solid in liquid, such as table salt in water, is a physical change because only the state of the matter has changed. Physical changes can often be reversed. Allowing the water to evaporate will return the salt to a solid state.

Step-1. Resonance structures are a set of two or море Lewis structures that collectively describe the electronic. bonding a single Polyatomic. Species include functional bonds and functional Charges.

Step-2. All the resonance structures. must follow the rule writing Lewis Structures. The Hybridisation of Structure must stay the same. The skeleton. of the structure cannot be charged the Same Resonance Structure must have the number of lone pairs.

Whenever Structure for you can draw two or more Lewis molecules. different only the location of the electron, the actual structure. is none of the structure but the resonance hybrid of them all.

Step-3 Given in the picture:

Step-4 The acetate anion (CH₂ coo) has two resonance Structures of the same energy.

These overlap to With half - bonds give the resonance. hybrid is poss the c-o intermolecular distance.

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Answer:

3 moles CH4, and each mole contains 6.02x10^23 molecules and each molecule contains 5 atoms, so there are 5 atoms/molecule x 6.02x10^23 molecules/mole x 3 moles = 9x10^24 atoms

Explanation:

The result in binary would be 10000011110101100000.

By constantly dividing the supplied number by 2 until we receive 0 as the quotient, we can convert a decimal number to a binary number in the simplest way possible. The binary value of the specified decimal number is then obtained by writing the remainders in reverse order. A binary number is made up of two 0s and 1s. Two is used as the base representation for binary numerals. As an illustration, (101)2 (101) 2. Switches can be used to encode and store numbers in binary form. This system is compatible with a variety of digital devices, including computers, calculators, digital TV decoder boxes, cell phones, burglar alarms, watches, and more. Binary values are kept in memory, which is essentially a collection of electronic on/off switches.

The complete question is- Convert 540000 to Binary form.

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B. The landform shared by both coastlines is dunes.

Sand dune is the process through which sand grains gather into a mound or ridge by the action breeze caused by gravity.

A sand dune is a landform made from wind or water as deposition agent. This sand dune usually take the shape of a ridge or hill.

Sand dunes are formed when rock break into particles that are easily carried by the wind to form this upward shape.

Once that first upward shape forms, sand gather up on a particular side until it takes the shape of dune

Thus, the landform shared by both coastlines is dunes.

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Peter Goemans  is the founder of Blue Bell .

Blue Bell was established in 1907 as a means of utilising extra cream from nearby dairy producers. Brenham Creamery Company, the predecessor to the business that is today known as Blue Bell, was founded in 1907. The men who founded it thought the name made sense because it was in the sleepy Texas town of Brenham.

Blue Bell may soon resume selling ice cream after a widespread recall forced the company to lay off 1,500 workers in May. Following a widespread product recall this past spring, Sid Bass, a Fort Worth oil millionaire, has now accepted a "substantial investment" from the Brenham, Texas-based ice cream firm Blue Bell.

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According to the given statement A sample of pure zinc has a mass of 4.50 g has a volume of 0.631 cm³.

A three-dimensional object's volume, expressed in cubic units (as inches, quarts, or centimetres), is its cubic capacity. the volume that a material takes up in a given space.

As opposed to length, width, and height for a rectangular shape's area, the basic formula for volume is length, breadth, and height. The calculation is unaffected by how the different dimensions are referred to; for example, "depth" can be used in place of "height."

Volume= Density/Mass

Mass = 4.50 g

Density = 7.13 g/cm³

Volume = ?

Volume = 4.50 g/7.13 g/cm³

Volume = 0.631 cm³

The zinc has a 0.631 cm³ volume.

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In sulfuric acid solution it is produced from sulphur, oxygen and water and  the amount of hydrogen is 0.038 mol

Here given data is zinc = 2.5 gram in 100 mL of sulfuric acid means H₂SO₄ solution

Then the reaction is

Zn + H₂SO₄ → ZnSO₄ + H₂

1 mol of Zn has mass = 65.39 g

The amount of Zn is 2.5 gram/ 65.39 g/mol

Zn = 0.038 mol

The amount of H₂ is same as amount of Zn consumed is 0.038 mol

Therefore, the amount of hydrogen produced 0.038 mol

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Answer:

low density -> high temperature -> increased particle motion -> high kinetic energy -> high thermal energy -> greater thermal expansion -> more contraction

Explanation:

To model the relationship between these factors, you need to understand how they interact. A greater density of particles usually means they are moving slower, thus resulting in less energy and less heat consequentially. As temperature increases, particles will begin to move rapidly (increase motion) and have higher kinetic energy. Similarly, a lower temperature will lead to less motion and lower kinetic energy. Furthermore, their thermal expansion will be less and have a decrease in contraction, as they will be more compact and dense.

Therefore you could make a model such as:

low density -> high temperature -> increased particle motion -> high kinetic energy -> high thermal energy -> greater thermal expansion -> more contraction

Answer:

if the forces among the particles that makeup the nucleus are balanced, it is stable. Stable atoms retain their form indefinitely, while unstable atoms undergo radioactive decay. Most naturally occurring atoms ate stable and do not decay. A stable atom has a net charge of 0. In other words, It has an equal number of protons and electrons.

Answer:

climate

Explanation:

they show climate and they are updated every 3 years so we can see how hot the planet is becoming

Answer:

fluorine is  soluble

Explanation:

Taking into account the definition of wavelength, frecuency and propagation speed, the frequency of radiation whose wavelength is 0.81 nm is 3.48×10¹⁷ Hz.

Wavelength is the minimum distance between two successive points on the wave that are in the same state of vibration. It is expressed in units of length (m).

Frequency is the number of vibrations that occur in a unit of time. Its unit is s⁻¹ or hertz (Hz).

The propagation speed measures the speed at which the wave disturbance propagates along its displacement.

The propagation speed relate the wavelength (λ) and the frequency (f) inversely proportional using the following equation:

v = f× λ

All electromagnetic waves propagate in a vacuum at a constant speed of  the speed of light.

In this case, you know:

Replacing in the definition of propagation speed:

3×10⁸ m/s= f× 0.86×10⁻⁹ m

Solving:

3×10⁸ m/s÷ 0.86×10⁻⁹ m= f

3.48×10¹⁷ Hz= f

In summary, the frequency of radiation whose wavelength is 0.81 nm is 3.48×10¹⁷ Hz.

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The name of the lab equipment is bunsen burner.

A bunsen burner is a piece of equipment found in many laboratories primarily used for the controlled burning of flammable gas in the air.

In the laboratory, the bunsen burner is used as a source of heating for reactions. The gas-air mixture can be controlled to determine the level of flame and heat that will be produced.

Bunsen burners can vary in structure depending on the maker. The gas supply can be any of butane, propane, etc.

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When boiling, the total mass of liquid and vaporized water stays the same.

The law of conservation of mass states that the mass can neither be created nor destroyed but is transformed from one form to another.

The law helps us to understand the conversion of energy from one form to another.

For example in a torch, the chemical energy of the batteries is converted into electrical energy, which is converted into light and heat energy.

Based on the law of conservation of mass, the total mass of of liquid and vaporized water during boiling will be constant.

Thus, when boiling, the total mass of liquid and vaporized water stays the same.

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Answer: stays the same

Explanation:

The energy of the photons are;

infrared radiation - 8.3* 10^4 J  

visible light - 2.52 * 10^5 J

ultraviolet radiation - 7.72 * 10^5 J

The energy of photon could be found by the use of the of the equation;

E = hc/λ * 6.023 * 10^23/1 mole

E = energy of the photon

c = speed of light

λ = wavelength of the photon

Now;

For infrared radiation;

E = 6.6 * 10^-34 * 3 * 10^8/1580 * 10^-9 * 6.023 * 10^23/1 mole * 1.10 mol

E = 8.3* 10^4 J  

For visible light;

E = 6.6 * 10^-34 * 3 * 10^8/520 * 10^-9 * 6.023 * 10^23/1 mole * 1.10 mol

E = 2.52 * 10^5 J

For ultraviolet radiation;

E = 6.6 * 10^-34 * 3 * 10^8/170 * 10^-9 * 6.023 * 10^23/1 mole * 1.10 mol

E= 7.72 * 10^5 J

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