Fast food and juice boxes are example of which of these?
group of answer choices

habitat destruction

air pollution

water pollution

overpackaging

i need a answer within 20 mins i will give 30 points

Answer:

their valence electrons are free roaming

The alkaline permanent waves have a pH between 9.0 to 9.6.

Alkaline permanent waves are chemical that is apply to the hair. The alkaline perm makes the hair curly or wavy.

The major ingredient is the ammonium thioglycolate and ammonium hydroxide.

The alkaline permanent wave is alkaline in nature and the pH scale for alkaline substances are higher.

pH of 7 depicts neutrality while pH of 7 and above depicts alkalinity.

Therefore, alkaline permanent waves have a pH between 9.0 to 9.6.

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Scientific theories are always testable. A theory may be changed as a result of new observations.

A scientific theory is a set of laws, facts and hypotheses that have a complete vision of an aspect of reality.

It is a proposed explanation for a set of observable phenomena.

It allows in this way to organize and understand the observations and to be able to predict or provoke other future observations.

Theories can be modified or improved as more information is collected.

That is, theories can continue to be tested indefinitely, and eventually rejected, if the tests lead to it.  

Therefore, a scientific theory is testable by using a research method.

As mentioned, any theory can be tested or rejected as more information is collected.

This information to prove or reject theories are interpretations of observable facts, which generates new statements or allows to accept those already included in the theory.

Then, a theory may be changed as a result of new observations.

Finally, scientific theories are always testable. A theory may be changed as a result of new observations.

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Answer:

testable & new observations

Explanation:

Explanation:

Ammonia has a formula mass of 17.031 g/mol, so the top blank is 1 and the bottom blank is 17.031

Calculating the product, we get the answer to be 1.5 mol

A Chemical change occurs when methane gas is burned.

A chemical change is a change of materials into another, new materials with different properties and one or more than one new substances are formed.

A chemical change occurs when matter undergoes a change to form a new substance with different chemical properties, and the reaction is usually not reversible.

In this case,burning of methane gas (CH₄) considered as chemical change.

Oxygen and methane are the reactants, while the new substance formed from the reaction are carbondioxide (CO₂) and water (H₂O) as ;

CH₄ + O₂  --->  CO₂ + H₂O

Hence, Chemical change occurs when methane gas is burned.

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2.23 moles of propane react when 294 g of CO₂ is formed .

Moles is a unit which is equal to the molar mass of an element.

A reaction is given

C₃H₈ +50₂ → 3CO₂ + 4H₂O

Grams of CO₂ formed = 294 gm

In moles = 294 /44 = 6.68 moles.

Let x be the moles of C₃H₈ is x

Mole ratio of CO₂ to C₃H₈ = 3 : 1

so

6.68 /x = 3/1

x = 6.68 /3 = 2.23 moles

Therefore 2.23 moles of propane react when 294 g of CO₂ is formed .

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The mass in grams of butane at standard room temperature is 53.21 grams.

The gram of an organic substance at room temperature can be determined by using the ideal gas equation which can be expressed as:

PV = nRT

1 × 22.4 L = n × (0.0821 atm*L/mol*K×  298 K)

n = 22.4/24.4658 moles

n = 0.91556 moles

Recall that:

mass of butane = 0.91556 moles × 58.12 g/mole

mass of butane = 53.21 grams

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Answer:

The bell and the Eiffel tower

The number of moles of gas lost is  0.0213 mol. It can be solved with the help of Ideal gas law.

According to this law, "the volume of a given amount of gas is directly proportional to the number on moles of gas, directly proportional to the temperature and inversely proportional to the pressure. i.e.

PV = nRT.

Where,

Therefore, the number of moles is

n = PV / RT

State 1 :

State 2 :

The loss in moles of gas from state 1 to state 2 is

Δn = V/R (P₁/T₁ - P₂/T₂ )

V/R = (1.75 x 10⁻³ m³)/(8.314 (N-m)/(mol-K) = 2.1049 x 10⁻⁴ (mol-m²-K)/N

p₁/T₁ = (225 x 10³)/298 = 755.0336 N/(m²-K)

p₂/T₂ = (185 x 10³)/283 = 653.7102 N/(m²-K)

Therefore,

Δn = (2.1049 x 10⁻⁴ (mol-m²-K)/N)*(755.0336 - 653.7102 N/(m²-K))

    = 0.0213 mol

Hence, The number of moles of gas lost is 0.0213 mol.

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The kinetic energy decreases as potential energy increases. Hence, option C is correct.

Potential energy is stored energy that depends upon the relative position of various parts of a system.

As the target is fired high on the wall, the change in the energy that is observed as the arrow moves toward the target is kinetic energy starts to decrease as the arrow reaches nearer to the target and the potential energy is observed to increase.

So, in short, the energy transformation is from kinetic energy from a moving arrow to potential energy when the arrow hits the target.

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Answer:

I d K

Explanation:

-1.09'C is the change in freezing point

“Freezing point depression” depends on the solvent and the molar concentration of the solute.

Sulfide is highly basic, consequently

K2S

completely and irreversibly hydrolyzes in water according to the following equation:

K2S+H2O→KOH+KSH

Freezing, also known as solidification, is a phase transition where a liquid turns into a solid when its temperature is lowered below its freezing point.

the temperature at which a liquid solidifies specifically : the temperature at which the liquid and solid states of the substance are in equilibrium at atmospheric pressure : melting point the freezing point of water is 0° Celsius or 32° Fahrenheit.

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Answer:1.0881

Explanation:

Answer: 3 methylhexane

Explanation: Attached is a picture of the molecule. Courtesy of the National Institute of Health, United States Government.

Answer: 3-methylhexane

Explanation:

The parent chain is six carbon atoms long, so there is the prefix 'hex'

There is a methyl branch on the third carbon atom, so it is 3-methylhexane.

The mass of [tex]YCl_3[/tex] that would be formed will be 18.22 grams

Let us first look at the balanced equation of the reaction:

[tex]2Y + 3Cl_2 --- > 2YCl_3[/tex]

The mole ratio of Y to [tex]Cl_2[/tex] is 2:3.

Mole of 10.0 grams of Y = 10/88.9 = 0.11 moles

Mole of 10.0 grams  [tex]Cl_2[/tex] = 10/71 = 0.14 moles

3/2 of 0.11 = 0.165. Thus,  [tex]Cl_2[/tex] is limiting in availability.

Mole ratio of  [tex]Cl_2[/tex] and [tex]YCl_3[/tex] = 3:2

Equivalent mole of [tex]YCl_3[/tex] = 2/3 x 0.14 = 0.093 moles.

Mass of 0.093 moles [tex]YCl_3[/tex] =0.093 x 195.26 = 18.22 grams

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Answer:

C. Sodium Chloride.

Explanation:

Because when NaCl dissolved in water, it will dissociate to produce 2 ions Na+ and Cl-.

The speed of light through space is 300 million m/s .

There was a time when everybody thought that there is no limit for the speed at which an object can travel , but Einstein gave the limit which is the speed of light.

The speed of the light in vacuum travels at a speed of 300 million m/s .

Therefore The speed of light through space is 300 million m/s .

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Various samples of the must be combusted in other to obtain a reliable result.

The bomb calorimeter is used to obtain the energy of a sample. This is called the energy equivalent or the energy value of the sample.

Now, we know that the bomb calorimeter is calibrated by the use of benzoic acid hence it must be combusted first to obtain the basic energy value of the calorimeter.

Various samples of the must be combusted in other to obtain a reliable result.

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Answer: Crystallization is a technique which chemists use to purify solid compounds. Crystals often form in nature when liquids cool and start to harden. Certain molecules in the liquid gather together as they attempt to become stable. They do this in a uniform and repeating pattern that forms the crystal. The process is based on the principles of solubility: compounds (solutes) tend to be more soluble in hot liquids (solvents) than they are in cold liquids. If a saturated hot solution is allowed to cool, the solute is no longer soluble in the solvent and forms crystals of pure compound. Impurities are excluded from the growing crystals and the pure solid crystals can be separated from the dissolved impurities by filtration.
For an example the salt we get from seawater can have many impurities in it. Hence, the process of crystallization is in use to remove these impurities.

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As the solution cools, the solvent can no longer hold all of the solute molecules, and they begin to leave the solution and form solid crystals.

During this cooling, each solute molecule in turn approaches a growing crystal and rests on the crystal surface.

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Would be well appreciated :)

Answer:

no idea about this question sorry

Answer:

(i)

Explanation:

is it right

brainliest?

Answer:

a.  P = 320 mmHg

Explanation:

For this problem, the pressure, volume, and temperature are changing, so we'll need to combine Boyle's Law and Charles' Law:

[tex]\dfrac{P_1V_1}{T_1}=\dfrac{P_2V_2}{T_2}[/tex]

For this equation, the temperatures must be measured in Kelvin.  The rest of units in the equation only need to match between beginning and end conditions.

Recall that to convert from Celsius to Kelvin, add 273, or use the equation [tex]T_C+273=T_K[/tex].

So [tex]T_1=(44.4+273)[K]=317.4[K][/tex]  and [tex]T_2=(68.1+273)[K]=341.1[K][/tex]

Substituting known values, we can solve for the unknown:

[tex]\dfrac{P_1V_1}{T_1}=\dfrac{P_2V_2}{T_2}[/tex]

[tex]\dfrac{(574.6[mmHg])(208.1[mL])}{(317.4[K])}=\dfrac{P_2(401.5[mL])}{(341.1[K])}[/tex]

[tex]\dfrac{(574.6[mmHg])(208.1[mL]\!\!\!\!\!\!\!\!\!\!{--} )}{317.4[K]\!\!\!\!\!\!{-}}*\dfrac{341.1[K] \!\!\!\!\!\!{-}}{401.5[mL] \!\!\!\!\!\!\!\!\!\!\!{--} }=\dfrac{P_2(401.5[mL] \!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!{-----})}{341.1[K] \!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!{----}}*\dfrac{341.1[K] \!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!{----}}{401.5[mL] \!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!{-----} }[/tex]

[tex]320.056719296[mmHg]=P_2[/tex]

Accounting for significant figures, [tex]P_2=320.1[mmHg][/tex].  

The closest answer provided is 320, so "a".

Answer:

the answer to the question is X3Y2

Answer:

1- Hydrogen enters plants as a component of water.

2-Hydrogen combines with carbon dioxide to make glucose.

Explanation:

Hydrogen enters the plant bonded with Oxygen as water (H2O).

The water molecule splits and the Hydrogen combines with carbon dioxide to make glucose.

Answer:

1 - Hydrogen enters plants as a component of water.

2 - Hydrogen combines with carbon dioxide to make glucose.

Explanation:

This means that the molar mass of [tex]\text{C}_{2}\text{H}_{4}\text{S}[/tex] is

[tex]2(12.011)+4(1.00794)+32.06=60.11376[/tex]

Dividing this by the given molar mass, we get [tex]\frac{168}{60.11376} \approx 3[/tex]

So, the molecular formula is about [tex]\boxed{\text{C}_{6}\text{H}_{12}\text{S}_{3}}[/tex]

The magnetism is either created inside a given element by passing some number of charges,Q across it or it is due to the interaction with a permanent magnet.

A physical phenomenon produced by the motion of electric charge, which results in attractive and repulsive forces between objects.

The magnet consists the characteristics of having an optimum amount of energy (P.E inside it) inside it.

As, the energy lines are either directed outwards from the north pole of the magnet, the south pole of the magnet consumes or absorbs the magnetic rays(energy lines) originated from the north pole of the magnet.

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Answer:

alkaline

Explanation:

Lithium reacts intensely with water, forming lithium hydroxide and highly flammable hydrogen. The colorless solution is highly alkalic.

According to the chemical reaction between lithium and water, lithium hydroxide is formed which is a basic substance.

Chemical reactions are defined as changes which occur when a substance combines with another substance to form a new substance.Alternatively, when a substance breaks down or decomposes to give new substances it is also considered to be a chemical reaction.

There are several characteristics of chemical reactions like change in color, change in state , change in odor and change in composition . During chemical reaction there is also formation of precipitate an insoluble mass of substance or even evolution of gases.

There are three types of chemical reactions:

1) inorganic reactions

2)organic reactions

3) biochemical reactions

During chemical reactions atoms are rearranged and changes are accompanied by an energy change as new substances are formed.

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