When population growth levels off in an ecosystem, it has reached its _________.

Answer:

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Vitamin A is a fat-soluble vitamin and an essential nutrient for humans. It is a group of organic compounds that includes retinol, retinal (also known as retinaldehyde), retinoic acid, and several provitamin A carotenoids (most notably beta-carotene (β-carotene).

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Answer:

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Redox is a type of chemical reaction in which the oxidation states of atoms are changed.

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Answer:

Plant A

Explanation:

This is because Plant A is what you will compare to the other plants. Because it has no fertilizer is is the independent variable.

At constant temperature, the final pressure of the compressed gas is 5.0atm.

Given the data in the question;

Final pressure; [tex]P_2 = \ ?[/tex]

Boyle's law states that the volume V of a given quantity of gas is inversely proportional to its pressure P at constant temperature.

It is expressed as;

[tex]P_1V_1 = P_2V_2[/tex]

Where [tex]P_1[/tex] is Initial Pressure, [tex]V_1[/tex] Initial volume, [tex]P_2[/tex] is Final Pressure and [tex]V_2[/tex] is Final volume.

To determine the final pressure of the gas, we substitute our given values into the expression above.

[tex]P_1V_1 = P_2V_2\\\\P_2 = \frac{P_1V_1}{V_2} \\\\P_2 = \frac{1.0atm \ *\ 4L}{0.800L}\\ \\P_2 = \frac{1.0atm \ *\ 4}{0.800}\\\\P_2 = \frac{4.0atm}{0.800}\\\\P_2 = 5.0atm[/tex]

Therefore, at constant temperature, the final pressure of the compressed gas is 5.0atm

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Answer:

Explanation:

Your circulatory system carries oxygen, water, and nutrients to cells throughout your body. Wastes from the cells are eliminated by your respiratory system, your excretory system, and your skin. Your nervous system controls all these activities with electrical impulses.

Answer:

Electron charge: -1

Neutron charge: 0

Proton charge: +1

Based on the flow rate data provided for the 6 M sulfuric acid solution;

The molar mass of sulfuric acid is obtained from the molar atomic masses of it component elements.

Molar mass of H2SO4 = (2 × 1) + (32 × 1) + (16 × 4)

Molar mass of H2SO4 = (2 = 98 g/mol

Based on the flow rate data provided:

Moles of 6 M sulfuric acid in 100 L = molarity × volume

Moles of 6 M sulfuric acid in 100 L = 6 M × 100 L = 600 moles

molar flow rate = 600 mol/min

Mass of 600 moles sulfuric acid = moles × molar mass

Mass of 600 moles sulfuric acid = 600 × 98 = 58.8 kg

Mass flow rate = 58.8 kg/min

Mass of sulfuric acid in 100 L solution = volume × density

density of sulfuric acid = 1.34 g/cm^3 = 1.34 kg/L

Mass of sulfuric acid in 100 L solution = 1.34 kg/L × 100 L = 134 kg

Therefore, total mass flow rate = 134 kg/min

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Answer:

CH₄ +2S₂ → CS₂ +2H₂S

Explanation:

Answer:

I think

0.6 moles of nitrogen

Answer:

All known vaccine molecules must be tested to find the right one.

Explanation:

I took the test

Answer: Particles are moving from regions of high concentration to low concentration.

Explanation:

Diffusion is driven by differences in concentration. When chemical substances such as perfume are let loose in a room, their particles mix with the particles of air. The particles of smelly gas are free to move quickly in all directions. They eventually spread through the whole room from an area of high concentration to an area of low concentration. This continues until the concentration of the particles of smelly gas is the same throughout the room. Remember that the particles still move, even when the smell is evenly spread.

Answer:

Answer: Particles are moving from regions of high concentration to low concentration.

Explanation:

right on edge 2021

Answer:

800 grams

Explanation:

Density = mass/volume  =>  mass = Density x Volume

Density = 0.80 g/ml

Volume = 1.0 Liter = 1000 ml

mass of 1.0 liter = 0.80 g/ml X 1000 ml = 800 grams

Answer:

A

Explanation:

This group includes beryllium, magnesium, calcium, strontium, barium, and radium. All group 2 elements have two valence electrons

Answer:

Water pipes sometimes burst during the winter because the cold causes the water to expand when frozen so the pipes cant exactly stretch causing stress on the pipe until it inevitably bursts

Answer:

sp2 = Bent, trigonal plannar

ap3=Bent, trigonal bipyramidal

Explanation:

right on edge 2021

Answer:

sp2 bent

trigonal planar

sp3 bent

tetrahedral  

Explanation:

The compound, solid Al2O3, is formed from solid aluminum and oxygen gas under certain conditions.

Solid aluminium oxide, Al2O3, is formed from its components elements as follows:

2Al (s) + 3O2 (g) ----------> 2Al2O3 (s)

The state of the aluminum element is solid, that of oxygen is gas, and that of the product, Al2O3, is solid.

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Answer: ionic bonds, covalent bonds

Explanation:

Got it right on my test.

Metals can forms ionic bond with non-metals by losing electrons from metals to the non-metals. They can also form metal metal bonds when they make metallic complexes and dimers. Thus option 4 is correct.

Ionic bond is the strongest type of bond formed between metals and nonmetal. Metals are electron rich and thus they are electropositive. They can donate electrons to non-metals.

Electronegative non metal atoms gain one or more electrons from the metals and thus forms the ionic compounds. Hence, ionic compounds are formed between atoms of high electronegativity difference.

Non metals like oxygen, nitrogen , halogens etc are highly electronegative and withdraw electrons from metals. Ionic compounds can have polarity if there occurs a charge separation between atoms.

Metals can also form metal-metal bonds with other metals in the case of coordination compounds and organometallic compounds. Hence, option 4 is correct.

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#SPJ2

Your question is incomplete. But your complete question probably was:

Metals can be involved in _______ ?

1, Covalent bonding

2.Ionic bonding

3. Metal-metal bond

4. Two of the above.

In the complete combustion of 5.75 L of CH₄ at 710 K, 5.75 L of CO₂ and 11.5 L of H₂O.

Combustion is a high-temperature exothermic redox chemical reaction between a fuel and an oxidant, usually atmospheric oxygen, that produces oxidized, often gaseous products, in a mixture termed as smoke.

CH₄(g) + 2 O₂(g) ⇒ CO₂(g) + 2 H₂O(g)

According to the balanced equation, the volume ratio of CH₄ to CO₂ is 1:1.

5.75 L CH₄ × 1 L CO₂/1 L CH₄ = 5.75 L CO₂

According to the balanced equation, the volume ratio of CH₄ to H₂O is 1:2.

5.75 L CH₄ × 2 L H₂O/1 L CH₄ = 11.5 L H₂O

In the complete combustion of 5.75 L of CH₄ at 710 K, 5.75 L of CO₂ and 11.5 L of H₂O.

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Answer:

Drier air over land than water

                   OR

A:warmer air over land than water

Answer:

The relationship between the boxer crab and the anemone is a form of symbiosis, called mutualism.

Explanation:

The boxer crab —Lybia tesselata— receives its name because it carries anemones in its anterior claws, in the form of boxing gloves, constituting a symbiotic association of a mutual type.

Mutualism is an interspecific relationship where two individuals of different species benefit from each other.

The anemone —usually of the genus Triactis or Bunodeopsis— has tentacles capable of secreting a stinging substance that contributes to the defense of the crab against its natural predators. On the other hand, the crab helps the anemone to transport and feeds on the food remains left by the crab.

Because the positive part of water molecules attracts negative chloride ions and the negative part of water molecules attracts positive sodium ions, water may dissolve salt. The solubility of a material is the quantity of that substance that can dissolve in a liquid (at a given temperature).

Answer:

Infrared radiation has longer waves than red light, and thus oscillates at a lower frequency and carries less energy. Ultraviolet radiation has shorter waves than blue or violet light, and thus oscillates more rapidly and carries more energy per photon than visible light does.

Explanation:

Answer:

Thx

Explanation:

The term that identifies the amount of heat needed to raise the temperature of 1 gram of a substance by 1 degree Celsius is Specific heat capacity.

Specific heat capacity is the quantity of heat needed to raise the temperature of 1 gram of a substance by 1 degree Celsius. The unit of specific heat capacity is joule per gram per degree Celsius (J/g⁰C).

Specific heat capacity is heat required to raise the temperature of a unit mass of a substance while heat capacity is the quantity of heat required to raise the temperature an entire mass of a substance.

Heat capacity is measure in Joules (J) while specific heat capacity is measured in joule per gram per degree Celsius (J/g⁰C).

Thus, the term that identifies the amount of heat needed to raise the temperature of 1 gram of a substance by 1 degree Celsius is Specific heat capacity.

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The term that identifies the amount of heat needed to raise the temperature of one gram of a substance by one degree Celsius is : ( A ) Specific heat

Specific heat also known specific heat is the amount of heat that is added to 1 unit ( gram ) of a substance in order to raise its temperature by one ( 1 ) degree Celsius of temperature.

Hence we can conclude that The term that identifies the amount of heat needed to raise the temperature of one gram of a substance by one degree Celsius is Specific heat

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Answer:

.5 moles of calcium

Explanation:

We want to find the number of moles in 3.01 x 10^23 atoms of calcium

To convert atoms to moles, we simply divide the given number of atoms by Avogadro's number , 6.022 x 10^23

Given number of atoms : 3.01 x 10^23

Number of moles : 3.01 x 10^23 / 6.022 x 10^23 = .5 moles of calcium ( rounded )

Answer:

Galeras has erupted more than 20 times since the 1500s. Volcanic activity has been frequent in the last five years, including an eruption in January 1993 that killed nine people on a scientific expedition to the volcano summit. Chuck Wood of VolcanoWorld was on Galeras at that time but was not injured

Explanation:

Galeras has erupted more than 20 times since 1500s. Volcano activity has been frequent in the last 5 years,including an eruption in January 1993 that killed nine people on a scientific expedition to the volcano summit.

Answer:

165.48 amu

Explanation:

First, you need to find the last percentage.

100% = 60.44% + 13.55% + x

100% = 73.99% + x

x = 26.01%

Now, multiply each mass by the respective percentage.

164.08 × 0.6044 = 99.17

165.11 × 0.1355 = 22.37

168.92 × 0.2601 = 43.94

Lastly, add the products together to find the average atomic mass.

99.17 + 22.37 + 43.94 = 165.48

The average atomic mass of "knoxium" is 165.48 amu

This problem is providing the masses of both toluene and butan-1-ol and the vapor pressure of the latter when pure. Thus, it asks for the vapor pressure of this alcohol in the mixture, therefore the answer turns out 812 Pa.

In chemistry, when two pure liquids are mixed, their properties as a mixture differ from those when pure, for that reason we use the Raoult's law in order to quantify these properties as pure substances, or when mixed with other substances.

In such a way, one can write this law for butan-1-ol as follows:

[tex]P_{but}=P_{but}^{pure}*x_{but}[/tex]

Where we know its vapor pressure as 885 Pa and we want to calculate its partial pressure but first its molar fraction with the given masses converted to moles as follows:

[tex]x_{but}=\frac{n_{but}}{n_{but}+n_{tol}} \\\\n_{but}=136.2g*\frac{1mol}{74.121g}=1.838mol\\ \\n_{tol}=15.6g*\frac{1mol}{94.14g} =0.166mol\\\\x_{but}=\frac{1.838mol}{1.838mol+0.166mol}=0.927[/tex]

Finally, we solve for its partial pressure:

[tex]P_{but}=885Pa*0.917\\\\P_{but}=812Pa[/tex]

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