It shows that the number of individuals in the population will ________ until the carrying capacity of the environment is reached.
Ecological models are _________ because they help scientists ________ what will occur in real life.
Explain what happened to the carrying capacity of reindeer on St. Matthew Island over time. ________
In ________ times, populations do well, and the number of individuals _________ rapidly. A period of rapid population ________ often follows, followed again by a ________ in numbers.
Give some examples of organisms present in a pond community: ___________________________________
A community and its ________ _ (nonliving) environment make up an ________

Answer: Synthesis

Explanation:

This is Synthesis because the reactants combine to form the products.

Chymotrypsin is an enzyme and, as such, it possesses the following characteristics:

A. Is a catalyst: Enzymes are biological catalysts that speed up chemical reactions without being consumed or altered in the process.

C. Speeds up a chemical reaction: Enzymes work by lowering the activation energy required for a reaction to occur. This means that the reaction can occur more quickly and efficiently in the presence of an enzyme.

D. Is found in cells of some living organisms: Enzymes are found in the cells of living organisms, where they play a crucial role in many biological processes, such as digestion, metabolism, and DNA replication.

These characteristics are common to all enzymes, including chymotrypsin, which is a type of protease enzyme that is involved in breaking down proteins in the digestive system.

B. Inhibits the binding of a substrate to an active site: This statement is incorrect. Enzymes actually increase the rate of reaction by facilitating the binding of the substrate to the active site, where the reaction takes place. Inhibitors, on the other hand, can interfere with this binding and slow down the reaction.

According to the stoichiometry of the mentioned chemical equation, 17.77 g of nitrogen gas is formed.

It is the determination of proportions of elements or compounds in a chemical reaction. The related relations are based on law of conservation of mass and law of combining weights and volumes.

Stoichiometry is used in quantitative analysis for measuring concentrations of substances present in the sample.

64 g of ammonium nitrite gives 36 g of nitrogen , thus, 32.5 g of ammonium nitrite will give 32.5 ×36/64=17.77 g.

Thus,17.77 g of nitrogen gas is formed.

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Answer : Slope = -3, intersection = 11

We need to isolate for y here.

From 9x+3y=33, we need to derive a y=mx+b equation.

First, we take away 9x as follows:

9x+3y-9x=33-9x

The positive and negative values of 9x cancel our on the y side, so we are left with 3y=-9x+33

Now we need to get rid of the y coefficient:

(3y)÷3=(-9x+33)÷3

We need to effectuate the division on both sides to cancel out the coefficient, so we are left with y=-3x+11

Answer: y-intercept = y = 11 - 3x

Slope is m = -3

Answer:

The mass of 2 moles of water is greater than the mass of 2 moles of carbon dioxide, which is greater than the mass of 2 moles of ozone.

2 moles of water has a mass of approximately 36 grams, whereas 2 moles of carbon dioxide has a mass of approximately 44 grams, and 2 moles of ozone has a mass of approximately 48 grams.

ALLEN

Answer:

The molar mass of iron (Fe) is approximately 55.845 g/mol or 55,845 Daltons.

Explanation:

Aɳʂɯҽɾҽԃ Ⴆყ ɠσԃKEY ꦿ

Answer:

17 atoms

Explanation:

So there are two aluminum atoms, three sulfur atoms, and 12 oxygen atoms in a single unit of the compound Al2(SO4)3. This sums to 17.

Density and mass concentration have the same numerical value for a pure substance. Density can be important to packaging, purity, and buoyancy because different materials typically have varied densities.

What is density?

At normal temperatures and pressures, osmium and iridium are the densest elements that are currently known.

The dimensionless number "relative density" or "specific gravity," which is the ratio of the material's density to that of a standard material, typically water, is occasionally used to substitute density in order to make density comparisons across different systems of units simpler.

As a result, if a substance has a relative density lower than one in comparison to water, it floats.

We know that

Density = mass / volume  

And volume = L*W*H (thickness)

First calculate the volume of foil as follows:

Density = mass / volume

Volume = mass / density  

= 2.722 g/ 7.26 g/ cm^3

= 0.375 cm^3

And volume = = L*W*H (thickness)

0.375 cm^3 = 5cm*5 cm * thickness

Thickness = 0.015 cm

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In order for 30mL of sodium hydroxide solution to completely react, 0.061 grams of potassium hydrogen phthalate are required.

A measurement of the amount of matter in an item, mass is a fundamental attribute of matter. It is a scalar quantity, usually expressed in grams (g) or kilograms (kg) (kg).

We must first develop and balance the chemical equation for the interaction between the two chemicals in order to determine the mass of potassium hydrogen phthalate needed to react with 30mL of sodium hydroxide at 0.01M. The correct answer is:

NaKC8H4O4 + H2O = KHC8H4O4 + NaOH

One mole of KHC8H4O4 combines with one mole of NaOH to create one mole of NaKC8H4O4 and one mole of water, as shown by the equation.

The number of moles of NaOH used in the reaction may then be calculated using the supplied NaOH concentration (0.01M) and the volume of NaOH used (30mL), using the formula:

volume x concentration equals moles of NaOH.

NaOH moles= 0.01 mol/L x 0.03 L x 0.0003 mol

We know that 0.0003 moles of KHC8H4O4 are required to thoroughly react with the NaOH utilized in the process because there is a 1:1 ratio in play.

Finally, using the formula: we can utilize the molar mass of KHC8H4O4 (204.22 g/mol) to determine the mass of KHC8H4O4 required.

mass = moles X molar mass

mass = 0.0003 mol X 204.22 mol = 0.061 g

Therefore, 30mL of 0.01M sodium hydroxide requires 0.061 grams of potassium hydrogen phthalate to completely react.

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Answer:

B. Determine the amount of phosphorus in each sample.

D. Determine the number of different types of monomers in each sample.

Answer:

A and B

Explanation:

A and B are useful in correctly identifying the samples as the nitrogen content can be used to determine if the sample is a protein, and the phosphorus content can be used to determine if the sample is a nucleic acid. These two tests would allow the scientist to differentiate between the two types of biomolecules.

The mass of ASA - Acetylsalicylic acid per tablet is 214.9 mg. The number of moles present in the tablet, is 0.001190.

For this experiment it is important to find the number of moles of ASA present in the solution. By doing this we will get the amount of ASA in the tablet also.

Students prepared a solution by hydrolyzing 0.3219 g of a crushed aspirin tablet in NaOH and then diluting with DI water in a 100-mL volumetric flask.

Number of moles = mass of ASA / molar mass of ASA

The molar mass of ASA = 180.16 g/mol

Therefore, Number of moles = 0.3219 g / 180.16 g/mol

= 0.001785 mol.

Now finding the number of moles present in the tablet,

Moles in tablet = (moles of ASA from solution) x (mass of tablet / mass of solution)

= 0.001785 mol x (0.4267 g / 0.3219 g x 1.50 mL / 50 mL)

= 0.001190 mol

Now finding the mass of ASA,

Mass of ASA per tablet = (moles of ASA in tablet) x (molar mass of ASA)

= 0.001190 mol x 180.16 g/mol

= 0.2149 g or 214.9 mg

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We're given that the enthalpy of formation of 1 mol of NH3 (aq) is -80.29 kJ/mol. This is the amount of energy it takes to form 1 mol of NH3 (aq).

To determine the enthalpy required to form 3 mol of NH3 (aq), multiply -80.29 by 3:

[tex]-80.29*3\\= -240.97[/tex]

b) -240.97 kJ

Answer:

8

Explanation:

because you only have 8 hamburger patties

The independent variable is the the widths of the wires.

In an experimental setup, the independent variable is the variable that is manipulated or changed by the researcher. It is also referred to as the "predictor variable" or the "explanatory variable."

The idea behind manipulating the independent variable is to observe its effect on another variable, which is called the dependent variable. The dependent variable is the variable that is thought to be affected by the independent variable.

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(a) tetrahedral (b) tetrahedral (c) bent or V-shaped (d) trigonal planar (e) bent or V-shaped (f) bent or V-shaped (g) linear (h) tetrahedral (i) trigonal planar

(a) The molecular structure is tetrahedral around the sulfur atom, with the four oxygen atoms forming the vertices of the tetrahedron.

(b) The molecular structure is tetrahedral around the chlorine atom, with the three oxygen atoms and hydrogen atom.

(c) The molecular structure is bent or V-shaped around the oxygen atom, with the two hydrogen atoms at the bottom of the V.

(d) The molecular structure is trigonal planar around the nitrogen atom, with the three oxygen atoms and hydrogen atom.

(e) The molecular structure is bent or V-shaped around the oxygen atom, with the hydrogen atom and nitrogen atom.

(f) The molecular structure is bent or V-shaped around the central oxygen atom, with the two other oxygen atoms at the bottom of the V.

(g) The molecular structure around each carbon atom is linear, with the two other carbon atoms forming a straight line with the carbon atom at the center.

(h) The molecular structure around the carbon atom is tetrahedral, with the two other carbon atoms and two fluorine atoms forming the vertices of the tetrahedron.

(i) The molecular structure around each carbon atom is trigonal planar, with the two other carbon atoms forming a straight line.

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--The complete question is, Describe the molecular structure around the indicated atom or atoms:

(a) the sulfur atom in sulfuric acid,

(b) the chlorine atom in chloric acid,

(c) the oxygen atom in hydrogen peroxide, HOOH

(d) the nitrogen atom in nitric acid,

(e) the oxygen atom in the OH group in nitric acid,

(f) the central oxygen atom in the ozone molecule,

(g) each of the carbon atoms in propyne,

(h) the carbon atom in Freon,

(i) each of the carbon atoms in allene--

Answer:

the final temperature of the aluminum after losing 2.87 x 10^3 J of heat is approximately 91.3 °C.

Explanation:

The relationship between heat, mass, and temperature change can be described by the formula:

Q = mcΔT

where Q is the heat transferred (in joules), m is the mass of the sample (in kilograms), c is the specific heat capacity of aluminum (about 0.9 J/g°C), and ΔT is the change in temperature (in degrees Celsius).

Rearranging the equation to solve for ΔT, we get:

ΔT = Q / (mc)

First, we need to convert the mass from grams to kilograms:

m = 53.2 g / 1000 g/kg = 0.0532 kg

Next, we can plug in the values for Q, m, and c and solve for ΔT:

ΔT = (2.87 x 10^3 J) / (0.0532 kg * 0.9 J/g°C) = approximately 63.7 °C

Finally, we can subtract the ΔT from the initial temperature to find the final temperature:

T_final = 155 °C - 63.7 °C = 91.3 °C

The relationship between temperature and gas motion is a direct relationship.

The kinetic energy of gas particles is proportional to the square of their velocity, so as the temperature of a gas increases, the velocity of its particles also increases. This means that the motion of the gases becomes more energetic, causing the particles to collide more frequently and with greater force. These collisions result in an increase in pressure and volume, which are two other characteristics that are related to the temperature and motion of gases.

In summary, the relationship between temperature and the motion of gases can be explained by the kinetic theory of gases, which states that the temperature of a gas is directly proportional to the average kinetic energy of its particles. As the temperature of a gas increases, its particles move faster, resulting in more energetic collisions and changes in pressure and volume.

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1 ppm of F- means 1 mg of F- in 1 L of water. The cylindrical water has a volume of 12.3 × 10⁸ L. Then, 12.38 × 10⁵ g of F- have to be added to the reservoir.

PPM or parts per million is a term used to express the concentration of a substance. One  ppm of a substance is its 1 mg in 1 L. Hence, 1 mg of F- is present in 1 L of water.

Volume of cylinder = π r² d

given that, diameter = 353 m

radius = 176.5 m

d= 12.65 m

v = 3.14 × (176.5)²×12.65 = 12.37× 10⁵ m³ = 12.37 × 10⁸ L.

1 L have 1 mg F-. Then, 12.37 × 10⁸ mg or 12.37 × 10⁵ g of F-.

Molar mass of NaF  = 46 g/mol

46 g of NaF contains 19 g of F-. Then, mass of NaF that contains 12.37 × 10⁵ g of F- is:

12.37 × 10⁵ g × 46/19 = 2.97×10⁷ g.

Therefore, 2.97×10⁷ g of NaF  contains 12.37 × 10⁵ g of F-.

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The three ways to increase the rate of calcium carbinate and hydrochloric acid are decreasing pressure, increasing temperature and use of catalyst.

Pressure is defined as the force applied on an object perpendicular to it's surface per unit area over which it is distributed.Gauge pressure is a pressure which is related with the ambient pressure.

There are various units by which pressure is expressed most of which are derived units which are obtained from unit of force divided by unit of area . The SI unit of pressure is pascal .

It is a scalar quantity which is related to the vector area element with a normal force acting on it.It is distributed over solid boundaries and across arbitary sections of fluid normal to the boundaries at every point.

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Answer:

792 moles.

Explanation:

When 66 moles of HNO3 are consumed, 6 x 66 = 396 moles of NO2 are produced.

Since the equation shows a 1:2 mole ratio between HNO3 and H2O, the number of moles of H2O produced is 2 x 396 = 792 moles.

The new temperature of the gas can be calculated using the ideal gas law: PV = nRT. Rearranging the equation to solve for temperature, we get: T = (PV)/(nR). With a volume of 400 ml, a pressure of 1 atm, and a constant R of 0.08206 L·atm/K·mol, the new temperature of the gas is 59.95°C.

Answer:

88.42°C

Explanation:

The temperature change of a gas can be calculated using Gay-Lussac's law, which states that the pressure-volume ratio of a gas is directly proportional to its temperature. The equation is:

P1/V1 = P2/V2 = (nRT)/V = constant

where P1 and V1 are the initial pressure and volume, P2 and V2 are the final pressure and volume, n is the number of moles, R is the gas constant, and T is the temperature in Kelvin.

Given the initial volume and temperature, we can rearrange the equation to solve for the final temperature:

T2 = (P1V1)/(nR) * (V2/P1)

Since the pressure is constant, we can simplify the equation to:

T2 = T1 * (V2/V1)

We can convert the temperature to Kelvin:

T1(K) = 45 + 273.15 = 318.15 K

T2(K) = T1 * (400/350) = 318.15 * (400/350) = 361.57 K

Finally, we can convert back to Celsius:

T2(°C) = 361.57 - 273.15 = 88.42 °C

The new temperature is 88.42°C.


ALLEN

Answer:

172 ml

Explanation:

To determine the volume to which you should dilute 133 ml of a 7.95 M CuCl2 solution so that 52.0 mL of the diluted solution contains 4.20 g of CuCl2, you need to use the equation for molarity:

M = moles of solute / liters of solution

We know the moles of solute, which can be calculated from the mass of CuCl2 using the molar mass:

4.20 g CuCl2 / (1 mole CuCl2 / 134.45 g CuCl2) = 0.0311 moles CuCl2

And we know the volume of the diluted solution, which is 52.0 mL or 0.052 L. Plugging in these values, we can solve for the molarity of the diluted solution:

M = 0.0311 moles CuCl2 / 0.052 L = 0.596 M

Now that we know the molarity of the diluted solution, we can use the equation for dilution to determine the volume to which we should dilute the original solution:

C1V1 = C2V2

Where C1 and V1 are the concentration and volume of the original solution and C2 and V2 are the concentration and volume of the diluted solution. Plugging in the values, we have:

7.95 M * V1 = 0.596 M * 0.133 L

Solving for V1, we get:

V1 = 0.133 L * 0.596 M / 7.95 M = 0.0172 L = 172 mL

So, to achieve the desired concentration in 52.0 mL of the diluted solution, you should dilute 133 mL of the 7.95 M CuCl2 solution to a volume of 172 mL

An aqueous solution containing 35.5 g of an unknown molecular (non-electrolyte) compound in 158.6 g of water was found to have a freezing point of -1.4 ∘C. Therefore, 3.3 × 10² g/mol is the molecular mass.

The quantity of fill with a molecule is referred to as its molecular mass. It is also known as molecular weight.

It is computed by multiplying the mass for every atom by the amount of atoms belonging to the element that the molecule contains. Water, for example, is composed of two hydrogen atoms and one oxygen atom.

ΔT = i × Kf × m

m = ΔT / i × Kf

m = (1.4°C) / 1 × (1.86 °C/m) = 0.70 m

moles of solute = m × kg of solvent = 0.70 mol/kg × 0.1500 kg = 0.11 mol

M = 35.9 g/0.11 mol = 3.3 × 10² g/mol

Therefore,  3.3 × 10² g/mol is the molecular mass.

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The relationship between rate and reactant concentration is given by the rate equation. Here reaction 2 is 2.4289 times faster than 1.

An equation which expresses the experimentally observed rate of a reaction in terms of the molar concentrations of the reactants that determine the rate of a reaction is called the rate equation.

Rate ∝ concentration

Rate = k [ concentration ]

Rate₁ / Rate₂ = k [conc]₁ / [conc]₂

= k × 0.210 / k × 0.510

= 0.4117

Rate₁ =  0.4117 × Rate₂

Rate₁ / 0.4117 = Rate₂

2.4289 × Rate₁ = Rate₂

Thus reaction 2 is 2.4289 times faster compared to reaction 1.

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Answer:

Explanation: Density is an intensive property of matter. This means that the value of density is independent of the quantity of matter present. It is measured by mass per unit volume. So, even though a gold statue may contain more mass or a larger quantity of gold than a gold coin, the density of both objects will remain the same, as they will have the same mass per unit volume.

the empirical formula of a compound containing 47. 37 grams of carbon, 10. 59 grams of hydrogen, and 42. 04 grams of oxygen is C3H8O2.

To determine the empirical formula of the compound, we need to find the ratios of the different elements present in the compound.

The first step is to convert the masses of each element to moles using their respective molar masses:

Carbon: 47.37 g / 12.01 g/mol = 3.94 mol

Hydrogen: 10.59 g / 1.01 g/mol = 10.48 mol

Oxygen: 42.04 g / 16.00 g/mol = 2.63 mol

Next, we divide each of the mole values by the smallest of the three, which is 2.63 mol:

Carbon: 3.94 mol / 2.63 mol = 1.50

Hydrogen: 10.48 mol / 2.63 mol = 3.98

Oxygen: 2.63 mol / 2.63 mol = 1.00

Now we need to convert these ratios to whole numbers by multiplying each by a common factor. The smallest ratio is 1.00, so we will multiply all the ratios by 2 to get:

Carbon: 1.50 x 2 = 3

Hydrogen: 3.98 x 2 = 8

Oxygen: 1.00 x 2 = 2

Therefore, the empirical formula of the compound is C3H8O2.

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Answer: 30.3 g

I had this question..If i hadn't done this I'd be confused.

Answer: Decomposition

Explanation:

The compound, (Aluminum Oxide), decomposes to form Aluminum and Oxygen.