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4 years ago

Food is the only limiting factor that keeps populations from growing too large true or false?

Chemistry

2 answers:

topjm [15]4 years ago

6 0

FALSE

There are other limiting factors like lack of space, diseases, and com petition.

OlgaM077 [116]4 years ago

5 0

The correct answer is False

Explanation:

A limiting factor refers to a condition that stops or limits the growth of a population of any species. Some of these factors include the availability of sources such as food, shelter or water; predation; natural weather conditions; natural disasters; and competence.

The previous idea implies food is not the only factor or condition that would stop or limit the growth of a population but there are many other factors that could prevent a population from growing too large, this includes abiotic factors (nonliving condition) such as weather and biotic factors (living condition) such as competition with other species or individuals or predation.

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What mass of Na2CO3 is required to create 750 mL of an aqueous solution where the concentration of the carbonate (CO3-2) ions is

Julli [10]

Answer:

139.11 grams

Explanation:

The molarity (M) is equal to m (moles) /L (liters).

Notice how it is in mL so converting it would be 0.75 L (750*10-3)

Now plug in the information

1.75=m/0.75

m=1.3125

Now m is in moles so convert to grams to get the mass

1.3125 mol Na2CO3 * 105.9888 g Na2CO3 = 139.1103

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3 years ago

Luca wants to identify and quantity the chemicals causing air pollution in a city, but he is using a manual air sampler to colle

xenn [34]

Answer

Manual samplers are prone to effects of temperature, speed of wind and air concentrations.

Explanation

Manual samplers face several challenges that can act as drawbacks to obtaining accurate results. They are subjected to effects of sampling duration where long sampling times are needed to obtain adequate mass for detection. Manual samplers face challenges when measuring non-volatile species because particles are observed into the adsorption medium at a slower rate of diffusion.

5 0

4 years ago

which of the following describes how ice could have once covered warm places such as australia and india

4vir4ik [10]

Answer:

U shaped vallies?

Explanation:

(i dont know if this was one of the options)

6 0

3 years ago

Be sure to answer all parts. draw the product of the lewis acid-base reaction. label the electrophile and nucleophile. br2 + feb

jolli1 [7]

Br₂ + FeBr₃----->Br-Br-FeBr₃

In this reaction, FeBr₃, is a electron-deficient species that is it act as a lewis acid.

While Br₂, donates its electron to FeBr₃.

Br₂, act as a electrophile while FeBr₃ is a lewis acid.

Futher if Br₂, undergoes a reaction an aromatic ring , then that ring will attack Br₂, and it acts as a electrophile.

4 0

3 years ago

Read 2 more answers

A student dissolves of styrene in of a solvent with a density of . The student notices that the volume of the solvent does not c

raketka [301]

Answer:

0.576M and 0.655m

Explanation:

<em>...Dissolves 15.0g of styrene (C₈H₈) in 250.mL of a solvent with a density of 0.88g/mL...</em>

<em />

Molarity is defined as moles of solute (Styrene in this case) per liter of solution whereas molality is the moles of solute per kg of solvent. Thus, we need to find the moles of styrene, the volume in liters of the solution and the mass in kg of the solvent as follows:

<em>Moles styrene:</em>

Molar mass C₈H₈:

8C = 12.01g/mol*8 = 96.08g/mol

8H = 1.005g/mol* 8 = 8.04g/mol

96.08g/mol + 8.04g/mol = 104.12g/mol

Moles of 15.0g of styrene are:

15.0g * (1mol / 104.12g) = 0.144 moles of styrene

<em>Liters solution:</em>

250mL * (1L / 1000mL) = 0.250L

<em>kg solvent:</em>

250mL * (0.88g/mL) * (1kg / 1000g) = 0.220kg

Molarity is:

0.144 moles / 0.250L =

Molality is:

0.144 moles / 0.220kg =

8 0

3 years ago