Which of the following best illustrates a natural process acting as a constructive force

Answers

Answer 1

Answer:

Wind depositing sand to build up sand dunes.

Explanation:

Related Questions

Which statement best describes the law of conservation of mass? (1 point)
O Chemical symbols are used to show atom balance before and after a reaction.
O Matter cannot be created or destroyed in a chemical reaction.
O Reactants and products cannot escape from a closed system
• Reactants in a chemical reaction rearrange to form a new substance or substances.

Answers

Matter cannot be created or destroyed in a chemical reaction best describe law of conservation of mass.

What is law of conservation of mass?

The law of conservation of mass states that for any system closed Mass can neither be created not destroy. the mass of the system must remain constant over time,.

Therefore, Matter cannot be created or destroyed in a chemical reaction best describe law of conservation of mass.

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If 25 milliliter of 0. 80 m hcl is used to completely neutralize 40. Milliliters of naoh solution, what is the molarity of the base?

Answers

If 25 milliliter of 0. 80M HCl is used to completely neutralize 40. milliliters of NaOH solution, the molarity of the base is 0.5M.

How to calculate molarity?

The molarity of a solution can be calculated using the following expression:

M1V1 = M2V2

Where;

M1 = molarity of acidM2 = molarity of baseV1 = volume of acidV2 = volume of base

25 × 0.80 = 40 × M2

20 = 40M2

M2 = 20/40

M2 = 0.5M

Therefore, if 25 milliliter of 0. 80M HCl is used to completely neutralize 40. milliliters of NaOH solution, the molarity of the base is 0.5M.

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A quantity of helium gas occupies 5 liters at room temperature and standard atmospheric
pressure (760 mm Hg). If the temperature stays the same, what will be the volume o
the helium if the pressure is increased to 950 mm of mercury?

Answers

The new volume of occupied by helium gas when its pressure is increased from 760 mm Hg to 950 mm Hg at an initial volume of 5 L is equal to 4 L.

Boyle's Law

Boyle's law state that at constant temperature, the volume of a fixed mass of gas is directly proportional to its pressure.

To calculate the volume of the helium gas, we use the formula below.

Formula:

P₁V₁ = P₂V₂............. Equation 1

Where:

P₁ = Initial pressureV₁ = Initial volumeP₂ = Final pressureV₂ = Final volume.

Make V₂ The subject of the equation

V₂ = P₁V₁/P₂............... Equation 2

From the question,

Given:

P₁ = 760 mm HgV₁ = 5 LP₂ = 950 mm Hg

Substitute these values into equation 2

V₂ = (760×5)/950V₂ = 4 L.

Hence, The new volume of occupied by helium gas when its pressure is increased from 760 mm Hg to 950 mm Hg at an initial volume of 5 L is equal to 4 L.

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I NEED THE AWNSER RIGHT NOWWWWW Four students categorized several environmental changes as short-term or long-term changes. Which chart correctly categorizes short- and long-term changes?

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Based on the duration and effect of the environmental change, the correct categorization is as follows:

Short-term changes - Fire, flood, pollution of waterways, disease Long-term changes- extinction, early frost, deforestation, desertification

What are environmental changes?

Environmental changes refers to changes that occur in the environment either due to natural causes or by human activities.

Environmental changes can be categorized into:

short-term changes andlong-term changes

Short-term changes occur over a short period of time while long-term changes occur over a long period of time.

Based on the chart, the correct categorization is as follows:

Short-term changes - Fire, flood, pollution of waterways, disease Long-term changes- extinction, early frost, deforestation, desertification

Therefore, both long-term and short-term changes occur in the environment.

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A chemist wants to make a solution using a crystalline solid and water. Which action would speed up the solution-making process?

A
Heat the water while adding the crystalline solid.

B
Slowly cool the water while adding the crystalline solid.

C
Divide the water into smaller batches, adding a little of the solid to each.

Answers

The action that would speed up the solution making process is : ( A ) Heat the water while adding the crystalline solid

Ways to increase solution making process

When preparing a solution or trying to dissolve a crystalline solid in water there are three ways which can be used to speed up the solution making process or dissolving the solid faster. and they are

Increase in temperature of water Divide the solid into smaller particles before adding them Increasing the stirring rate

From the options listed above the best action is to heat the water while adding the crystalline solid.

Hence we can conclude that The action that would speed up the solution making process is : ( A ) Heat the water while adding the crystalline solid.

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Answer: A

Explanation: heat the water

The main purpose of homeostasis is to

A. fight disease-causing organisms.

B. keep internal conditions stable.

C. produce offspring.

D. replicate DNA.

Answers

b. keep internal conditions stable

B. Keep the internal conditions stable.

which acid would produce the salt zn(no3)2

Answers

Answer:

Explanation:

Nitric Acid (HN03)

Zn(OH)2 + 2HNO3 ==> Zn(NO3)2 + 2HOH

Calculate the mass percent of water in the formula:
MgSO4.7H20
Please help me and explain how you got it I gotta pass my chem class pls help!

Answers

Answer:

%H20=

(14xH)+(7xO)______________________________ X 100(Mg) + (S) + (4 x O) + (14 x H) + (7 x O)Thus,(14 x 1.008) + (7x16.0)______________________________________ X 10024.31 + 32.06 + (4x16.0) + (14 x 1.008) + (7x16.0)=126.122_____________ X 100246.482= 0.512 x 100=51.2%There is 51.2% of water is Magnesium Sulphate-7-water.

POSSIBLE POINTS:

I perform a Haber Process reaction and I get 10.0g of NH3, if I was theoretically supposed to get 15.7g, what is my percent yield?

O 63.69 %

O 60 %

O 63.7%

O 64 %

1

2

3

4

5

6

7

8

9

10

Answers

Answer:

63.7

Explanation:

Percent yield is actual yield over theoretical yield. In this case, 10/15.7 = .637 = 63.7%.

A solute is added to water and a portion of the solute remains undissolved. When equilibrium between the dissolved

Answers

Answer:

are you to measures how much solute dissolved with the water or trying to measure how much more water you need the solute to dissolve in ?

The solute is a component of the solution that is added to a solvent to make a solution. when equilibrium is attained then the solution will be saturated.

What is a saturated solution?

A saturated solution is a solution that contains the maximum amount of dissolved solute particles in it and cannot further dissolve solutes added additionally.

When the solute is added and does not get dissolved then the equilibrium between dissolved and undissolved is reached and the solution becomes saturated.

Therefore, the solution is saturated.

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Approximate the solution to the equation using three iterations of successive approximation

Answers

A solution has to do with the presence of a solute where there is a homogenous mixture of different substances in order to get their limit of solubility.

What is an Iteration?

This refers to a method in organic chemistry where there is a sequence of reactions that are used to synthesize molecules.

Please note that your question is incomplete so I gave you a general overview to help you get a better understanding of the concept.

Answers

The moles of water are used in the given reaction between CO₂ & H₂O is 12 moles.

How do we calculate mass from moles?

Mass of any substance will be calculated by using their moles as:

n = W/M , where

W = given or required mass

M = molar mass

Given chemical reaction is:

6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂

Moles of 528 g of CO₂ = 528g / 44.01g/mol = 11.99 moles

From the stoichiometry of the reaction, it is clear that:

6 moles of CO₂ = reacts with 6 moles of H₂O

So, 11.99 moles of CO₂ = reacts with 11.99 = 12 moles of H₂O

Hence option (a)is correct i.e. 12 moles.

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Answer:

Explanation:

Between which atoms do hydrogen bonds form in water?
A) Oxygen and hydrogen atoms in the same water molecule
B) Oxygen and hydrogen atoms in different water molecules
C) Hydrogen atoms in the same water molecule
D) Oxygen atoms of different water molecules

Answers

Answer:

right answer is A bcz

Explanation:

In the case of water, hydrogen bonds form between neighboring hydrogen and oxygen atoms of adjacent water molecules. The attraction between individual water molecules creates a bond known as a hydrogen bond.

Answer:

oxygen and hydrogen indifferent molecules

If a buffer is composed of 33. 80 ml of 0. 164 m acetic acid and 31. 63 ml of 0. 189 m sodium acetate, how many ml of 0. 100 m hcl can be added before the buffer capacity is reached?

Answers

For a buffer is composed of 33. 80 ml of 0. 164 m acetic acid and 31. 63 ml of 0. 189 m sodium acetate,The volume of HCl is mathematically given as

v1=70.1148mL

What volume of HCL can be added before the buffer capacity is reached?

Generally, the equation for the Chemical reaction is mathematically given as

HCl+CH3Coo-Na---->CH3CooH+NaCl

Therefore

Mole of HCl=34.37*0.204*10^-3

Mole of HCl=7.011*10^-{-3}

In conclusion

M1v1=m2v2

Therefore

[tex]v1=\frac{m2v2}{m1}\\\\v1=\frac{7.011*10^-{-3}}{0.1}[/tex]

v1=70.1148mL

Answers

Answer:

hmm suspicious

lol I don't know bye

The picture above shows a frying pan. Why are frying pans usually made out of metal?

Answers

Answer: The frying pan is made up of metals like aluminium or stainless steel as these metals are good conductor of heat.

Answer:

b. they are good conductors of heat

Explanation:

study island

A mixture of H2 and water vapor is present in a closed vessel at 20. 00°C. The total pressure of the system is 755. 0 mmHg. The partial pressure of the water vapor 17. 50 mmHg. What is the partial pressure of H2? Type in your answer using the correct number of significant figures. MmHg.

Answers

The partial stress of H2 is 737.47 mmHg Let's observe the Ideal Gas Law to find out the whole mols.

We count on that the closed vessel has 1L of volume

P.V=n.R.TWe must convert mmHg to atm. 760 mmHg.1 atm755 mmHg (755/760) = 0.993 atm0.993 m.1L=n.0.082 L.atm/mol.K .293 K(0.993 atm 1.1L)/(0.082mol.K /L.atm).293K = n0.0413mols = n

These are the whole moles. Now we are able to know the moles of water vapor, to discover the molar fraction of it.

P.V=n.R.T760 mmHg. 1 atm17.5 mmHg (17.5 mmHg / 760 mmHg)=0.0230 atm0.0230 m.1L=n.0.082 L.atm/mol.K.293 K(0.0230atm.1L)/(0.082mol.K/L.atm .293K)=n 9.58 × 10 ^ 4 mols = n.Molar fraction = mols )f gas/general mols.Molar fraction water vapor =9.58×10^ -four mols / 0.0413 molsSum of molar fraction =11 - 9.58 × 10 ^ 4 × mols / 0.0413 ×mols = molar fraction H20.9767 = molar fraction H2H2 pressure / Total pressure =molar fraction H2H2 pressure / 55mmHg = =0.9767 0.9767 = h2 pressure =755 mmHg.737,47 mmHg.What is a mole fraction?

Mole fraction is a unit of concentration, described to be identical to the variety of moles of an issue divided through the whole variety of moles of a solution. Because it's miles a ratio, mole fraction is a unitless expression.

Thus it is clear that the partial pressure of H2 is 737,47 mmHg.

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In which situation might a forensic scientist decide to collect fiber evidence from a crime scene?

if collection with a paper bag or sheet of paper isn’t feasible

if there’s a risk of the evidence getting lost if it is transferred on other objects

if there’s a likelihood that fiber evidence exists at the scene of a crime

if there are multiple crime scenes with fiber items that need to be transported

Answers

Answer: C

Explanation:

C just because the other choices dont really make sense. They use these fibers as a way to see what clothes, shoe strings, carpets, etc was there it help identify a person at the scene. Hope this helps!!

what is the difference between bacteria and cancer cells

Answers

Las bacterias son microorganismos procariotas que presentan un tamaño de unos pocos micrómetros y diversas formas, incluyendo esferas, barras, filamentos curvados y helicoidales.
Las células cancerosas son células que se dividen sin descanso, formando tumores sólidos o inundando la sangre con células anormales. La mitosis es un proceso normal utilizado por el cuerpo para el crecimiento y la reparación.

"Ozone Depletion."
Spray bottles, air conditioners, and
refrigerators used to contain CFCs
and halogens. These chemicals
destroyed ozone and broke apart the
ozone layer. They made two large
holes at the North and South Poles.
However, most of these chemicals
are now not allowed.
What is the MOST accurate summary of this
paragraph?

Answers

Answer:

CFCs and halogens coming from spray bottles and other human satisfaction sustaining devices cause global warming, which will cause sea levels to rise. Because of this, several countries have banned these chemicals because of anticipation of a rise of sea levels and several important countries to be sunken.

Calcium acetate reacts with sodium carbonate to produce calcium carbonate and sodium acetate

Answers

Answer:

(CH₃COO)₂Ca(aq) + Na₂CO₃(aq) = 2CH₃COONa(aq) + CaCO₃(s)

2CH₃COO⁻ + Ca²⁺ + 2Na⁺ + CO₃²⁻ = 2CH₃COO⁻ + 2Na⁺ + CaCO₃

Ca²⁺ + CO₃²⁻ = CaCO₃

what is a water cycle

Answers

Answer:

the cycle of water and how it evaporates with energy from the sun and the droplets are stored in clouds which is condensation and when it rains or snows those are forms of precipitation

Explanation:

Answer:

it shows the continuous movement of water within the earth and atmosphere

Compare the relative strength of the two forces A and B. Explain how you determined this comparison by identifying the forces.

Answers

The intermolecular forces present in B will be much stronger than the intermolecular forces present in A.

What are intermolecular forces?

The term intermolecular forces has to do with the forces that hold molecules of a substance together in a particular state of matter. Now, we can see that B must contain dipole - dipole interaction while A has none of these.

It then follows that the intermolecular forces present in B will be much stronger than the intermolecular forces present in A.

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Using the data below, what would be the independent variable?

Height of foam

Type of soda

Number of mentos

Color of mentos

Answers

Answer:

Number of mentos

Explanation:

i took the quiz

6. What is the mass of the object if the net force acting on it was 356 N and the acceleration rate
was 4 m/s/s2

Answers

The mass of an object with a net force of 356N and an acceleration rate of 4m/s² is 89kg.

How to calculate mass?

The mass of an object can be calculated using the following formula:

F = ma

Where;

F = force (N)m = mass (kg)a = acceleration (m/s²)

m = F/a

m = 356/4

m = 89kg

Therefore, the mass of an object with a net force of 356N and an acceleration rate of 4m/s² is 89kg.

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How many moles of Oxygen gas are in a container that has a total volume of 33.0L at a pressure of 96.2kPa and a temperature of 35°C.

ideal gas constant= 8.31[tex]\frac{L(kPa)}{mol(K)}[/tex]

Answers

A 33.0-L container at 96.2 kPa and 35 °C contains 1.24 moles of oxygen.

What is an ideal gas?

An ideal gas is a hypothetical gas whose molecules occupy negligible space and have no interactions, and which consequently obeys the gas laws exactly.

First, we will convert 35°C to Kelvin using the following expression.

K = °C + 273.15 = 35 + 273.15 = 308 K

We want to calculate the number of moles of oxygen in a 33.0-L container at 96.2 kPa and 308 K. We will use the ideal gas equation.

P × V = n × R × T

n = P × V / R × T

n = 96.2 kPa × 33.0 L / (8.31 l.kPa/mol.K) × 308 K = 1.24 mol

where,

P is the pressure.V is the volume.n is the number of moles.R is the ideal gas constant.T is the absolute temperature.

A 33.0-L container at 96.2 kPa and 35 °C contains 1.24 moles of oxygen.

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What are the key control points within the citric acid cycle?

Answers

The citrate synthase, isocitrate dehydrogenase, and the α-ketoglutarate dehydrogenase complex are the three key control points.

What are the key control points within the citric acid cycle?

The key control points in citric acid cycle are the reactions catalyzed by citrate synthase, isocitrate dehydrogenase, and the α-ketoglutarate dehydrogenase complex.

So we can conclude that citrate synthase, isocitrate dehydrogenase, and the α-ketoglutarate dehydrogenase complex are the three key control points.

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The citric acid cycle is a chemical cycle that releases stored energy. Citrate synthase, isocitrate dehydrogenase, and alpha-ketoglutarate dehydrogenase are the control point of the cycle.

What is a citric acid cycle?

The citric acid cycle or the TCA cycle (tricarboxylic acid cycle) is the chemical series of reactions that releases energy from food sources like fats, carbohydrates, and proteins.

The TCA cycle includes enzymes and many substances that regulate it but three major points are Citrate synthase, isocitrate dehydrogenase, and alpha-ketoglutarate dehydrogenase.

Therefore, they get inhibited, regulated, and limit the rate of the reaction.

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The solution to be tested in this experiment must be buffered to ph of 10. If the ph were considerably higher, such as 12, how would the [oh-] change

Answers

For a solution to be tested in this experiment and must be buffered to pH of 10, the [OH-] change will be, The hydroxide concentration would be higher and the formation of insoluble hydroxide salts with Mg^2 and Ca^2 would cause the determined concentration of water hardness to be too low.

What would be the [OH-] change?

Generally, the equation for the Total hardness is mathematically given as

[tex]T=\frac{A*D*1000}{B}[/tex]

Where

[tex]D=\frac{molarity}{0.01}[/tex]

D=0.02/0.01=2

Therefore

[tex]T=\frac{A*D*1000}{B}\\\\T=\frac{20.4*2*1000}{25}[/tex]

T=1632ppm

in conclusion, The hydroxide concentration would be higher .

Answers

Answer:

This study is an overview of previous studies on lime (quick and hydrated) -treated soil. Lime is the oldest traditional stabilizer used for soil stabilization. The mechanism of soil-lime treatment involves cation exchange, which leads to the flocculation and agglomeration of soil particles. The high pH environment then causes a pozzolanic reaction between the free Ca+2 cations and the dissolved silica and alumina. Lime-treated soil effectively increases the strength, durability and workability of the soil. Such treatment also improves soil compressibility. A fluctuation behavior was observed on the influence of lime on soil permeability. However, the factors affecting the permeability of the soil-lime mixture should be extensively studied. Nonetheless, lime treatment has a number of inherent disadvantages, such as carbonation, sulfate attack and environment impact. Magnesium oxide/hydroxide are thus proposed as a suitable alternative stabilizer to overcome at least some of the disadvantages of using lime in soil stabilization.

Explanation:

Actually I have a pdf on it to explain more if you want but how to get it to you is the issue. well I'm guessing the one I've put out should be very much okay, I hope so .

What two countries have nearly 50% of global coal reserves? a. united states and canada b. united states and russia c. brazil and russia d. brazil and canada please select the best answer from the choices provided a b c d

Answers

Answer:

Explanation:

The two countries that have nearly 50% of global coal reserves are

United States and Russia

Option B is correct

What is the global coal reserves?

Estimates of total world proved recoverable coal reserves as were around 1,156 billion short tons, with five countries accounting for roughly 75% of the world's proven coal reserves.

In conclusion, The USA coal reserves amounted to nearly 248.9 billion metric tons in 2020