Use the following Information to answer question 10.
DDT is a pesticide that farmers used to spray on their crops to ward off insects.
Unfortunately, once DDT is released into the environment, it does not break
down. Because of this, DDT can spread as shown in the example below,
Crop
Insect
Bird->
Falcon
10. In this example, as the DDT passes along up the food chain, the concentration of
DDT would:
a gradually decrease
b. gradually increase
c. remain the same
d. decrease then increase

The amount of heat released in kJ when 75 grams of phosphorus react with excess chlorine is 858.848 kJ.

Moles of P = mass of P / molar mass of P = 75 g / 30.97 g/mol = 2.42 moles

From the balanced chemical equation, 2 moles of P react with 5 moles of Cl2 to form 2 moles of PCl5.

Moles of PCl5 = (2.42 moles P / 2 moles PCl5) x (2 moles PCl5 / 5 moles Cl2) = 0.968 moles

Heat released = moles of PCl5 x AH° = 0.968 moles x (-886 kJ/mol) = 858.848 kJ

In other words, the amount of heat released in kJ when 75 grams of phosphorus react with excess chlorine is approximately 858.848 kJ.

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Answer:

Los padres transmiten rasgos o características, como el color de ojos y el tipo de sangre, a sus hijos a través de sus genes. Algunas condiciones de salud y enfermedades también pueden transmitirse genéticamente. A veces, en

Answer: Sodapop is hotter

Explanation: no cap

Answer:

100% Nick Popkes

Explanation:

Complete question is;

Water flows over Niagara Falls at the average rate of 2,400,000 kg/s, and the average height of the falls is about 50 m. Knowing that the gravitational potential energy of falling water per second = mass (kg) x height (m) x gravity (9.8 m/s²), what is the power of Niagara Falls? How many 15 W LED light bulbs could it power?

Answer:

A) Power of Niagara Falls = 1.176 × 10⁹ W

B) 78.4 × 10⁶ bulbs

Explanation:

A) We are given;

The mass flow rate of Niagara falls = 2,400,000 kg/s

The average height of the fall = 50 meters

Gravitational potential energy = mass (kg) x height (m) x gravity (9.8 m/s²)

Now, formula for power is; workdone/time taken.

Thus it's potential energy/time taken.

Hence;

Power = (mass (kg) x height (m) x gravity (9.8 m/s²))/time(s)

We know that mass/time is mass flow rate.

Thus; power = mass flow rate (kg/s) × height (m) × gravity (9.8 m/s²)

Thus;

Power of Niagara Falls = 2400000 × 50 × 9.8 m/s²

Power of Niagara Falls = 1.176 × 10⁹ W

B) The number(n) of 15 W LED light bulbs Niagara falls could power is given by the relationship;

n × 15 W = 1.176 × 10⁹ W

Thus;

n = 1.176 × 10⁹ W/(15 W)

n = 78.4 × 10⁶ light bulbs

The number of 15 W LED light bulbs Niagara falls could power = 78.4 × 10⁶ bulbs

Answer:

The role of indicator in titration is to detect the endpoint of the titration. When the colour of the solution changes, it indicates that the concentration of the chemical specie has reached a critical range. This change in colour is possible with the help of indicators.

Explanation:

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correct me if I'm wrong and if correct brainliest me please

William James described the human mind as doing the thinking and sensing; the self is the descriptive object of thoughts about the self.

William James, a renowned philosopher and psychologist, described the "mind" as doing the thinking and sensing, while the "self" is the descriptive object of thoughts about oneself. According to James, the mind is responsible for all our cognitive processes, including perception, memory, and reasoning. It helps us make sense of the world around us and allows us to react and respond accordingly.

On the other hand, the self is the individual's perception and understanding of themselves. It is the subjective experience of being oneself, and it is shaped by personal experiences, cultural background, and social interactions. James' insights into the mind and the self have had a significant impact on modern psychology and continue to influence our understanding of human consciousness and behavior.

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The aspects of thermodynamics the enzyme can not change are alter the overall energy balance of a chemical reaction and overall direction of a reaction

Firstly, enzymes cannot alter the overall energy balance of a chemical reaction, the first law of thermodynamics states that energy cannot be created or destroyed, only converted from one form to another. Enzymes can speed up reactions by lowering the activation energy, but they cannot change the total energy input or output.

Secondly, enzymes cannot change the overall direction of a reaction, as dictated by the second law of thermodynamics, this law states that natural processes tend to increase the entropy (disorder) of the system. If a reaction is not thermodynamically favorable (i.e., it would result in a decrease in entropy), enzymes cannot make it occur spontaneously. They can only increase the reaction rate if the reaction is already favorable. In summary, enzymes can speed up the reaction rate and lower activation energy, but they cannot change the total energy balance or the overall direction of a reaction, as these are determined by the laws of thermodynamics.

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The mean of the data is 4.

The formula of the mean is

Sum of all the observation÷ Total number of observations

So, According to the formula :

Sum of all the observations= 4+1+3+9+6+3+2+4 = 32

The number of observations is 8

So,

32÷8

= 4

Hence, the mean of the data is 4.

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The atoms of the group's bottom-most elements are larger than those of the group's top-most components.

The atoms below in the group contain more electrons than the atoms at the group's top, which explains why. More electrons must be organized in more electron shells, which are spaced farther out from the nucleus as the number of electrons increases. The result of this is that atoms are growing larger.

Atomic radius often increases as one moves through a group and decreases as one moves through a period. The distance between the nucleus and the outermost orbital increases as one descends a group because the number of energy levels (n) increasing. The atomic radius grows as a result.

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Answer:

The Moon orbits the Earth which orbits the Sun.

Explanation:

The volume of carbon dioxide produced when 10.0 L of oxygen is consumed is 6.67 L of CO2 (rounded to two decimal places).

Given balanced equation: C2H4(g) + 3 O2(g) → 2 CO2(g) + 2 H2O(g)The molar volume of all gases at standard temperature and pressure is 22.4 L/mol.Using the balanced equation, we can find the ratio of the volume of oxygen used to carbon dioxide produced.C2H4(g) + 3 O2(g) → 2 CO2(g) + 2 H2O(g)3 moles of O2 produce 2 moles of CO2So, 1 mole of O2 produces (2/3) moles of CO2 or 1 mole of CO2 produces (3/2) moles of O2.

To find the volume of carbon dioxide produced when 10.0 L of oxygen is consumed, we need to use the mole ratio:3 mol O2 → 2 mol CO22/3 mol CO2 is produced by 3 mol O210.0 L of O2 is consumed, which is equal to 10.0/22.4 = 0.4464 moles of O2Thus, using the mole ratio:0.4464 mol O2 × (2/3) mol CO2/1 mol O2 = 0.2976 mol CO2The volume of 0.2976 mol CO2 is:0.2976 mol CO2 × 22.4 L/mol = 6.67 L of CO2 (rounded to two decimal places).

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The mass of \(Al_{2} S_{3}\) produced is 15.616 grams.

The reaction taking place is as follows:

\(2Al+ 3S\) →\(Al_{2} S_{3} (s)\)

Moles of Al = mass/molar mass = 10.0g/27.0g/mol

= 0.370 mol

Moles of S = mass/molar mass = 15.0g/(32.065g/mol)

= 0.468 mol

Al and S reacts in the molar ratio of 2:3.

2 moles of Al reacts with 3 moles of S

0.370 moles of Al will react with S = (3/2)*0.370mol

= 0.555 mol

Similarly, 0.468 moles of S will react with Al = 2/3 *0.468mol

= 0.312 mol

Thus, Al is in excess and S is the limiting reactant (some of Al will be left over ,S will completely react)

So, moles of \(Al_{2} S_{3}\) produced=1/3*0.312 mol of S

= 0.104 mol

Mass of \(Al_{2} S_{3}\) produced = moles*molar mass of \(Al_{2} S_{3}\)

= 0.104mol*150.158g/mol

= 15.616 grams

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A.

Reason: cuz i need points noob

Answer:

Physical change

Explanation:

Answer: This is true! Living organisms use two major types of energy storage.

Answer:

carbon

Explanation:

Answer:

Carbon

Carbon is the second most common molecule in the human body

Answer:

it's blue/green

Explanation:

The mass of hydrochloric acid contained in 0.767 l of solution is 340 grams.

1. Convert the volume of the solution from liters to milliliters:

0.767 L × 1000 mL/L = 767 mL

2. Calculate the mass of the solution using the given density:

Mass = Volume × Density

Mass = 767 mL × 1.19 g/mL = 912.73 g

3. Determine the mass of hydrochloric acid HCl in the solution by multiplying the mass of the solution by the percentage of HCl:

Mass of HCl = Mass of solution × (37.2 % HCl)

Mass of HCl = 912.73 g × 0.372 = 339.54 g

4. Round the mass of HCl to the nearest whole number:

Mass of HCl = 340 g

So, 340 g of HCl is contained in 0.767 L of the concentrated hydrochloric acid solution.

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The volume of the balloon is 3.788l.

Boyle's law:

Boyle's law state that the volume of a gas at constant temperature varies inversely with the pressure exerted on it.

The formula of Boyle's law:

P1V1 = P2 V2

P1 = 1.334atm

V1 = 1.88l

P2 = 0.662 atm

Putting the values in the equation we have:

1.334 × 1.88 = 0.662 × V2

V2 = 2.51/ 0.662

    = 3.788 l

Therefore the volume is 3.788l

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The ways to identify the components necessary for a combustion reaction include:

This is referred to as burning and involves high-temperature exothermic redox chemical reaction.

This type of reaction involves the use of a gas such as oxygen which supports it and other flammable substances.

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Food/liquid/gas are moving through your stomach to your intestines - stomach growling is a part of digestion. When there is a lot of food in your stomach the sounds are muffled, when your stomach is empty you can hear the “growls” easier.

I learned that the growling does not indicate hunger as we are often told. It indicates your stomach is empty which does not automatically mean you’re hungry. When your stomach has nothing to digest it frees up your body’s energy and focuses it in other areas. This is why people find fasting beneficial.

Thanks,

Eddie

Answer:

help me mark me as a brinliest

Based on Lana's diagram, the correct statement that explains the results of asexual reproduction is C. The offspring are genetically identical to the parent, because each offspring receives a complete copy of a single parent's chromosomes.

In the diagram, the parent cell divides into two identical daughter cells, each of which contains a complete copy of the parent cell's genetic material.

This type of reproduction, where a single parent produces offspring that are genetically identical to itself, is called asexual reproduction. It is the process by which many unicellular organisms, such as bacteria and some protists, reproduce.

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Answer:

A

Explanation:

The molecules in both metal and surrounding air will start moving slower because of the sudden decrease in environment tmeperature. The thermal energy around the metal plate decreases, also decreasing the kinetic energy.

33.7 grams of NaN are required to produce 50.2 L of N2 gas at a density of 1.25 g/L.

Stoichiometry is the calculation of the quantities of reactants and products involved in a chemical reaction. It is based on the principle of conservation of mass, which states that in a chemical reaction, matter is neither created nor destroyed, but is merely transformed from one form to another. Therefore, the number and types of atoms present in the reactants must be equal to the number and types of atoms present in the products.

We must use stoichiometry as well as the ideal gas law to solve this problem.

First, we need to determine the number of moles of N2 gas produced using the balanced chemical equation:

2 NaN(s) + 3 N2(g) → 2 Na(s) + 3 N2(g)

From the balanced equation, we can see that 3 moles of N2 are produced for every 2 moles of NaN used. Therefore, we need to use the following conversion factor:

2 moles NaN / 3 moles N2

Next, we can use the ideal gas law to calculate the number of moles of N2 gas produced:

PV = nRT

n = PV/RT

n = (50.2 L) x (1.25 g/L) / (0.0821 L·atm/mol·K x 298 K)

n = 2.20 moles N2

Now, we can use the conversion factor to determine the number of moles of NaN required:

2 moles NaN / 3 moles N2 = x moles NaN / 2.20 moles N2

x moles NaN = (2 moles NaN / 3 moles N2) x (2.20 moles N2)

x moles NaN = 1.47 moles NaN

Finally, we can calculate the mass of NaN required using its molar mass:

m = n x M

m = 1.47 moles x 22.99 g/mol

m = 33.7 g

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Answer:

The charge of a Strontium atom that has 10 electrons is 4.48 × 10⁻¹⁸ C

Explanation:

The atomic number of Strontium is 38

The electronic configuration of Strontium is given as follows;

1s²2s²2p⁶3s²3p⁶3d¹⁰4s²4p⁶5s²

The atomic number of Strontium is 38 electrons in orbit and 38 protons in its nucleus and is electronically neutral

38e⁻ + 38e⁺ = 0

When there are only 10 electrons in an atom of Strontium, we have;

10e⁻ + 38e⁺ = +28e

The charge of a Strontium atom that has 10 electrons is +28e

+28e = 28×1.6×10⁻¹⁹ C = 4.48 × 10⁻¹⁸ C

The charge of a Strontium atom that has 10 electrons is +28e or 4.48 × 10⁻¹⁸ C.

The specific composition of oil-based paint can vary depending on the brand and formulation.

Oil-based paint typically consists of three main components: pigments, binders, and solvents. The pigments provide the color and opacity to the paint, while the binders are responsible for holding the pigment particles together and adhering them to the painted surface. The solvents help to adjust the paint's consistency and facilitate its application.

The binder in oil-based paint is commonly a natural oil, such as linseed oil or tung oil. These oils are composed of fatty acid molecules, which contain a long carbon chain with a carboxyl group (-COOH) at one end. The carboxyl group can react with oxygen in a process called oxidation, forming a cross-linked network of molecules that harden over time, creating a durable paint film.

The solvents in oil-based paint are typically organic compounds, such as mineral spirits or turpentine. These solvents dissolve the binder and pigments, making the paint flowable and easy to apply. As the solvent evaporates, the paint gradually dries and the binder undergoes the oxidation process, resulting in the formation of a solid paint film.

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