Unrestricted populations of organisms experience _____.a. exponential growth
b. linear growth
c. fertility
d. biotic growth
User: As a population reaches its carrying capacity, there is an increase in competition for
a. food.
b. shelter.
c. mates.
d. All of the above

Answers

Answer 1

Answer:

Answer:

1. A

2. D

Explanation:

1. If a population is left unrestricted, meaning it is not limited to anything, then the population will continue to increase exponentially due to there being no limits.

2. If a population is limited, and it has reached its carrying capacity, then the essential needs of life are being competed for. Things like food, shelter, and mates are now a limited resource, and hence the option would be "all of the above".

Answer 2

Answer: Unrestricted populations of organisms experience Exponential growth.

As a population reaches is carrying capacity there is an increase in competition for All of the above.
Hope I helped.

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In which equation does the term "heat" represent heat of fusion?(1) NaCl(s) + heat -->NaCl(l)(2) NaOH(aq) + HCl(aq) -->NaCl(aq) + H2O(l) + heat(3) H2O(l) + heat --> H2O(g)(4) H2O(l) + HCl(g) -->H3O+(aq) + Cl-(aq) + heat
Describe and explain how petrol is separated from the mixture of hydrocarbons in crude oil?
Please help brainiest.
4.75 mL is the same as 0.00475 L. True or False

A solution contains 20.0 g of C6H12O6 (glucose) in 250 g. of water.A. what is freezing point depression of solvent?

Answers

Answer:

The freezing point depression of solvent is 0.8265 K.

Explanation:

Mass of glucose = 250 g

Mass of solvent = 20.0 g = 0.020 kg

Molal depression water constant of water, $K_f$ = 1.86 K kg/mol

Molality of the solution = $(20 g)/(180 g/mol* 0.250 kg)=0.4444 mol/kg$

Normal freezing point of water = $T=273 K$

Freezing point of solution = $T_f$

$\Delta T_f=T-T_f$

$\Delta T_f=K_f* molality=1.86 K kg/mol * 0.4444 mol/kg=0.8265 K$

The freezing point depression of solvent is 0.8265 K.

Molar mass glucose = 180 g/mol

number of moles:

20 / 180 = 0.111 moles

Δ t f * ( Kf) *( i ) * ( m )

250 g of water in Kg = 250 / 1000 = 0.25 kg

1.86 ºC/m * 0.111 / 0.25

1.86ºC/m * 0.444

= 0.82584ºC

Fp = 0ºC - 0.82584

Fp = - 0.82584ºC

hope this helps!

Would the concentration of hydroxide ion in a 0.30 m solution of potassium hydroxide (koh) be greater than, less than, or equal to 0.30 m?

Answers

Potassium hydroxide KOH is a strong base which can completely ionize to form potassium and hydroxide ions.

The equation representing ionization of KOH,

$KOH(aq)-->K^(+)(aq)+OH^(-)(aq)$

The mole ratio of hydroxide to KOH from the above equation is $(1molOH^(-) )/(1molKOH)$

The given concentration of KOH solution=0.30M

Calculating the concentration of hydroxide ions present in 0.30M KOH solution:

$(0.30mol KOH)/(L) *(1mol OH^(-) )/(1 mol KOH) =0.30(mol)/(L)OH^(-)$

Therefore the concentration of hydroxide ion will be equal to 0.30 M in a 0.30 M KOH solution.

Final answer:

The concentration of hydroxide ion in a 0.30 m solution of potassium hydroxide would be equal to 0.30M. Potassium hydroxide is a strong base, it completely dissociates in water producing an equal concentration of hydroxide ions. In a basic solution where the concentration of Hydroxide ions is high, the concentration of hydronium ions will be low.

Explanation:

The concentration of hydroxide ion in a 0.30 m solution of potassium hydroxide (KOH) would be equal to 0.30 M. This is based on the fact that potassium hydroxide is a strong base and it completely dissociates in water, which means one KOH molecule produces one hydroxide ion. Therefore, the concentration of the hydroxide ion [OH-] in the final solution would be equal to the initial concentration of the potassium hydroxide.

This is different from the behavior of weak acids and bases which do not completely dissociate in water, leading to a lower concentration of hydronium (H3O+) or hydroxide (OH-) ions compared to the initial concentration of the acid or base.

However, it's important to note that in solutions with a high concentration of hydronium ions, the concentration of hydroxide ions will decrease according to Le Chatelier's principle, which describes how equilibrium adjusts when it's disturbed. Conversely, in a basic solution—like this 0.30 M KOH solution—where the concentration of hydroxide ions is high, the concentration of hydronium ions will be comparatively low.

Learn more about Ionic Dissociation here:

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Which participates in chemical reactions?electrons
protons
neutrons
gamma rays

Answers

I think the correct answer is electrons. All chemical reactions are dependent on the transfer of electrons. Other subatomic particles are located in the innermost portion of an atom and are bonded strongly with each other.

Answer: Option (a) is the correct answer.

Explanation:

A chemical reaction is the reaction that involves gain and loss of electrons due to which there is formation of new compounds or products.

Foe example, $HCl + NaOH \rightarrow NaCl + H_(2)O$

That is, in chemical reactions change in oxidation state of reactants occur.

Hence, we can conclude that out of the given options electrons participates in chemical reactions.

A scientist carries out a reaction twice. In Trial A, the scientist combines the reactants in a container. In Trial B, the scientist combines the reactants in the same container, but she also adds a catalyst. If everything else is the same about the two trials, what is most likely true about Trial B?

Answers

Trail B will have a lower activation energy than trail A because in this trial the scientist added a catalyst.

What is a catalyst?

A catalyst is a substance that can be added to a reaction to increase the reaction rate without getting consumed in the process.

A catalyst is a substance that speeds up a chemical reaction or lowers the temperature or pressure needed to start one, without itself being consumed during the reaction.

Catalysts slow down reaction rates which will in turn mean a loweractivation.

Hence, trail B will have a lower activation energy than trail A because in this trial the scientist added a catalyst.

Learn more about the catalyst here:

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Answer:

It will have a lower activation energy than Trial A.

Explanation:

Trail B will have a lower activation energy than trail A because in this trial the scientist adds a catalyst. Catalysts slow down reaction rates which will in turn mean a lower activation.

Mixtures can be either_____
(fixed composition) or_____
(variable composition)

Answers

Mixtures can be either fixed composition or variable composition.

A fixed composition mixture is a mixture that has a constant and unchanging composition, meaning that the proportions of the components remain the same throughout the mixture. Examples of fixed-composition mixtures include solutions, suspensions, and colloids. In a solution, for example, the solute is dissolved in the solvent in a specific ratio, and the composition of the solution remains constant. In a suspension, the particles of one substance are suspended in another substance, but the composition of the suspension remains constant. In a colloid, the particles of one substance are dispersed throughout another substance, but the composition of the colloid remains constant.

On the other hand, a variable composition mixture is a mixture that can change its composition over time. Examples of variable composition mixtures include gases and solutions that are not in equilibrium. In a gas, the molecules are free to move and interact with each other, so the composition of the gas can change over time. In a solution that is not in equilibrium, the components can separate or mix over time, leading to changes in the composition of the solution.

It's important to note that the composition of a mixture can be influenced by a variety of factors, including temperature, pressure, and the presence of other substances. For example, the composition of a solution can be affected by changes in temperature, as the solute and solvent can interact differently at different temperatures. Similarly, the composition of a gas can be affected by changes in pressure, as the molecules can move more or less freely at different pressures.

In conclusion, mixtures can be either fixed composition or variable composition, and the composition of a mixture can be influenced by a variety of factors. It's important to understand the composition of a mixture in order to understand its properties and behavior.

A solid precipitate is formed from the reaction of lead nitrate and sodium chromate. What would be the best method to separate this solid from the solution?

Answers

The appropriate response is filtration. Filtration is any of different mechanical, physical or organic operations that different solids from liquids by including a medium through which just the liquid can pass. The liquid that goes through is known as the filtrate

The correct answer would be "filtration". It's a process that has operations that separate solids from fluids. This is done simply by adding a medium through which only the fluid can pass. After the fluid passes through a certain medium it it's called a filtrate.

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