1. What do you call to the series of steps designed to help you solve problems and answer questions? A. Scientific Analysis B. Scientific Method C. Scientific Investigation D. Scientific Rules
2. Which of the following variables should remain the same in the experiment to obtain a fair result? A. Controlled Variables B. Independent Variables C. Dependent Variables D. Uncontrolled Variables
3. Garry observed that mango trees receiving the most water produced more fruits. What is the independent variable in the situation? A. Fruits B. Water C. Mango tree D. Soil
4. What is the correct order of Scientific Method? I. Analyze Results II. Ask a question III. Communicate Results IV. Draw Conclusions V. Make a Hyptohesis VI. Test the Hyptohesis A. II I V VI IV III B. II V VI I IV III C. II V VI IV I III D. V VI I II IV III
5. Which step Scientific method is used to test Hyptohesis? A. Conduct an experiment B. Make observations C. Draw conclusions D. Record the results 6. What is the last step in the scientific method? A. Analysis B. Conclusion C. Making hypothesis D. Make observations 7. Why is experiment important? A. It helps to create jobs for scientists. B. It creates more questions to be answered. C. It ensures that many tools are used safely and accurately. D. It allows new discoveries and knowledge in science. 8.Why is Scientific Method and important in doing experiments? A. It takes more work but it is worth it. B. It helps the experiment to take longer and be better. C. It ensure that the results can be trusted and repeated. D. It ensures that the people doing the experiments are scientific.
9.What do you call to the information gathered during the experiment? A. Conclusion B. Hypothesis C. Data D. Variables
10.What step could be completed first to solve a problem? A. Analyzing Data B. Testing Hypothesis C. Drawing conclusions D. Recognizing and identifying the problem​

Answer:

Electric current generates an accompanying magnetic field, as in electromagnets. When an electric current flows in an external magnetic field, it experiences a magnetic force, as in electric motors. The heat loss, or energy dissipated, by electric current in a conductor is proportional to the square of the current.

Explanation:

Answer:

about 2 years I think, you might have to ask your dentist

Explanation:

Answer:

it really depens of ur treatment i had braces and it took a year and now i got them again and they say its gonna take a year so it depends on ur treatment

Explanation:

The number of atoms of hydrogen in 12.26 pounds of sugar (C₆H₁₂O₆) is 2.23 × 10²⁶.

Given information,

Mass of sugar = 12.26 pounds

12.26 lb ÷ 2.20 lb/kg = 5.57 kg = 5570 grams

The molar mass of sugar = 12 × 6 + 1 × 12 + 16 × 6

Total molar mass = 72.06 + 12.12 + 96.00 = 180.18 g/mol

Number of moles of sugar = Mass / Molar mass

Number of moles = 5570 g / 180.18 g/mol = 30.89 mol

Number of moles of hydrogen = 30.89 mol × 12 = 370.68 mol

Number of atoms of hydrogen = The number of moles × Avogadro's number

Number of atoms of hydrogen = 370.68 × 6.022 × 10²³ ≈ 2.23 × 10²⁶ atoms

Therefore, there are approximately 2.23 × 10²⁶ atoms of hydrogen in 12.26 pounds of sugar (C₆H₁₂O₆).

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Answer:

The Answer is a liquid.

Answer: 4

Explanation: if you move to spaces in a number line from 2 you would be at 4

Explanation:

Your search - What is the answer to 9.7300x10^2+9.8700x 10^3 1.0843x 10^ in scientific notation - did not match any documents.

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Answer: Vanadium, and Titanium

Explanation:

Answer:

To find the least soluble substance at a given temperature we follow the temperature line up and the first substance curve we hit is the least soluble. For most soluble it is the same procedure except the last substance curve hit is the most soluble.

To determine if a substance is more soluble or less soluble based on a solubility curve, you need to compare the solubility values at different temperatures. Here's how you can interpret a solubility curve:

1. Higher Points on the Curve: If a point on the curve is higher, it indicates that the substance is more soluble at that temperature. In other words, at higher temperatures, the substance can dissolve in a greater amount.

2. Lower Points on the Curve: If a point on the curve is lower, it means that the substance is less soluble at that temperature. In this case, at lower temperatures, the substance can dissolve in a smaller amount.

3. Comparing Points: By comparing the solubility values at different temperatures, you can determine which temperature has a higher solubility and which has a lower solubility. The steeper the slope of the curve, the faster the increase or decrease in solubility with temperature.

Solubility curves provide a graphical representation of the relationship between temperature and solubility. They allow you to determine the solubility characteristics of a substance and how it changes with temperature.

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Answer:

0.714 moles

Explanation:

whenever you see  × 10^23 molecules

its an Avogadro's number question

Avogadro's number is 6.02214076×10²³

1 mole is 6.02214076×10²³ molecules

4.3 × 10²³ molecules divided by 6.02214076×10²³ molecules per mole =

4.3 × 10²³ ÷ 6.02214076×10²³ =

0.71403179888 moles

socraticorg

Answer: Predominant tropical easterly winds sweep across the central and southern portions of the state, keeping the temperatures mild

Explanation:

bc

Answer:

n = 2.1 mol

Explanation:

Given data:

Number of moles of gas = ?

Volume of gas = 56.3 L

Pressure of gas = 0.899 atm

Temperature of gas = 20°C (20+273 = 293 k)

Solution:

The given problem will be solve by using general gas equation,

PV = nRT

P= Pressure

V = volume

n = number of moles

R = general gas constant = 0.0821 atm.L/ mol.K  

T = temperature in kelvin

0.899 atm × 56.3 L  = n × 0.0821 atm.L/ mol.K  × 293 k

50.614 atm.L = n × 24.055 atm.L/ mol

n = 50.614 atm.L / 24.055 atm.L/ mol

n = 2.1 mol

Answer:

I think (B) is right answer because here oxygen is a combustible material and combustible is always take place when oxygen is burn

The thermometer didn't say anything to the graduated cylinder because thermometers and graduated cylinders are inanimate objects and cannot speak or communicate with each other. A thermometer is an instrument used for measuring temperature.

It is a sealed glass tube containing a liquid (usually mercury) that expands and contracts as the temperature changes. A graduated cylinder is a cylindrical container used to measure the volume of liquids. It is made of glass or plastic and has markings along its side indicating different volume measurements.

The increase in temperature can lead to a range of problems that can negatively impact the ecosystem, humans, and animals, leading to several problems. Hence, it is essential to control the concentration of greenhouse gases.

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Answer: (i) C2H2 = Ethyne , (ii) C2H4 = Ethylene , (iii) C2H6 = Ethane

Explanation:

Ethyne, also known as Acetylene is an organic chemical compound with chemical formula C2H2. The Ethyne molecule features a tripple bond between two carbon atoms, each of which is single bonded to one another hydrogen atom.

Ethylene is an unsaturated organic compound with the chemical formula C2H4. It has one double bond  between carbon atoms and is the simplest member of the alkene class of hydrocarbon.

Ethane is a saturated hydrocarbon found in gaseous state with chemical formula C2H6. It has single bond  between carbon atoms and contains two carbon atomsand six hydrogen atoms

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The empirical formula of Benzoic Acid is C3H3O.

What is an empirical formula?

An empirical formula represents the simplest ratio of atoms present in a compound. It is determined based on experimental data, such as the mass or percentage composition of elements in the compound.

We are given the percentages of carbon (C), hydrogen (H), and oxygen (O) in benzoic acid:

C: 68.8%

H: 5.0%

O: 26.2%

To convert these percentages to grams, assume we have a 100g sample of benzoic acid.

C: 68.8g

H: 5.0g

O: 26.2g

Next, we need to convert the grams of each element to moles using their respective atomic masses:

C: 68.8g / 12.01 g/mol = 5.73 mol

H: 5.0g / 1.01 g/mol = 4.95 mol

O: 26.2g / 16.00 g/mol = 1.64 mol

Now, we need to find the simplest whole number ratio of these moles. To do this, divide each mole value by the smallest value:

C: 5.73 mol / 1.64 mol = 3.50 ≈ 3

H: 4.95 mol / 1.64 mol = 3.02 ≈ 3

O: 1.64 mol / 1.64 mol = 1.00 ≈ 1

So we got C3H3O.

Hence, the empirical formula of benzoic acid is C3H3O.

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The species would be an anuran (an amphibian)

We need to answer this in English.

Here we want to find "A species that mates on the surface and then deposits its eggs in the water to be surrounded by sperm"

This would be known as a species of amphibian called an anuran, specifically a frog or toad.

Frogs and toads belong to the order Anura and have a characteristic reproductive cycle that involves external fertilization. During reproduction, the male releases his sperm into the water, and the female deposits her eggs in the water as well. The eggs are externally fertilized by sperm that swim around them. This process is known as external or external fertilization.

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The insolubility of calcium sulfide (CaS) in water is due to weak ion-dipole interactions, strong ion-ion interactions, the presence of covalent bonds, and a decrease in entropy upon dissolution.

These factors prevent CaS from dissolving in water and result in its insoluble nature. Calcium sulfide (CaS) is insoluble in water due to several reasons:
1. Ion-dipole interactions: When a salt dissolves in water, the positive ions are attracted to the negative end of water molecules (oxygen atom), and the negative ions are attracted to the positive end of water molecules (hydrogen atoms). However, in the case of calcium sulfide (CaS), the ion-dipole interactions between the calcium ions (Ca2+) and water molecules are very weak. This means that the attraction between the Ca2+ ions and water molecules is not strong enough to overcome the strong attraction between the Ca2+ ions and the sulfide ions (S2-), resulting in the insolubility of CaS in water.

2. Ion-ion interactions: In the case of salts containing Ca2+ ions, they are generally insoluble in water. This is because the ion-ion interactions between the Ca2+ and sulfide ions (S2-) are very strong. The attractive forces between these ions are much stronger than the attractive forces between the ions and water molecules. As a result, the Ca2+ and sulfide ions remain together as a solid rather than dissolving in water.

3. Covalent bonds: Another reason for the insolubility of CaS in water is the presence of covalent bonds in the compound. In CaS, the calcium and sulfur atoms are bonded together by covalent bonds. Covalent bonds are formed by the sharing of electrons between atoms. Breaking these covalent bonds requires a significant amount of energy. Therefore, for CaS to dissolve in water, the energy required to break the covalent bonds would be too high, making it unlikely for the compound to dissolve.

4. ΔS (change in entropy): When a substance dissolves in water, there is often an increase in the disorder or randomness of the system, which is indicated by a positive change in entropy (ΔS). However, in the case of CaS, the possible arrangements for water molecules would decrease upon dissolution, resulting in a negative change in entropy (ΔS). This decrease in entropy further contributes to the insolubility of CaS in water.

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False. The addition of a solute to a solvent typically lowers the freezing point of the solution compared to the freezing point of the pure solvent.

This is due to the fact that the solute particles interfere with the arrangement of the solvent particles, which makes it more difficult for the solution to freeze. As a result, the solution has to be cooled to a lower temperature in order for it to freeze, which results in a lower freezing point compared to the pure solvent. Freezing point depression is a colligative property, which means that it depends on the concentration of solute particles in the solution, rather than on their chemical nature. When a non volatile  solute (a solute that does not evaporate at room temperature) is dissolved in a solvent, it increases the number of solute particles in the solution. These solute particles interfere with the arrangement of the solvent particles, making it more difficult for the solvent to freeze. As a result, the solution has to be cooled to a lower temperature in order for it to freeze, which results in a lower freezing point compared to the pure solvent. To summarize, the addition of a non volatile solute to a solvent typically lowers the freezing point of the solution, and therefore the statement "The freezing point of the solution is unchanged by the addition of the solvent" is false.

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A type of biotechnology called artificial selection is deliberately breeding plants or animals to promote or eliminate specific desirable qualities. Crops may be carefully bred by farmers, for instance, to increase their resistance to pests or drought.

Artificial selection is a type of biotechnology that involves selectively breeding plants or animals to enhance or suppress certain desirable traits.

For example, farmers may selectively breed crops to make them resistant to pests or droughts.

One benefit of artificial selection for individuals is that it can lead to higher crop yields, which can result in increased profits for farmers. However, one risk of artificial selection for individuals is that it can lead to the loss of genetic diversity in crops, which can make them more vulnerable to disease outbreaks.

One benefit for society is that artificial selection can help to alleviate hunger and food shortages by producing more food. However, one risk for society is that artificial selection can lead to the creation of monocultures, which are vulnerable to pests and disease outbreaks.

One benefit for the environment is that artificial selection can lead to the production of crops that require fewer pesticides and herbicides, which can reduce pollution. However, one risk for the environment is that artificial selection can lead to the loss of biodiversity, which can negatively impact ecosystems.

Attached is an image of a farmer selectively breeding crops.

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a) This type of reaction is a combustion reaction.

b) The reaction is a combustion reaction and the percent yield is 50%.

The percent yield of a reaction can be calculated by dividing the actual yield of a product by the theoretical yield of the product, multiplied by 100%.

To find the theoretical yield of the product, we need the balanced equation: \(2 C_2H_2(g) + 5 O_2(g)\) → \(4 CO_2(g) + 2 H_2O(g)\)

The theoretical yield of water is 2 moles \(H_2O\) x 18.5 g/mole = 37 g

To find the actual yield of the product, we are given that 18.5 g of water is formed.

So the percent yield = (actual yield / theoretical yield) x 100%

= (18.5g / 37g) x 100% = 50%.

So the percent yield of this reaction is 50%.

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Answer:

2.5 silly = 0.00025 kilosilly

Explanation:

To convert: \(2.5\) silly to kilosilly

Solution:

Relation between \(2.5\) silly and kilosilly is given as follows:

1 silly = \(\frac{1}{1000}\) kilosilly

Now use this formula to convert \(2.5\) silly to kilosilly.

\(2.5\) silly\(=\) \(\frac{2.5}{1000}\) kilosilly

Here, \(\frac{2.5}{1000} =0.00025\)

So,

2.5 silly = 0.00025 kilosilly

Answer:

Metaphase

Explanation:

Metaphase is characterized by the chromosomes lining up at the equator; they are getting ready to separate. As it looks like from the picture, it looks like the chromosomes are in the middle. The chromosomes aren't quite pulled apart. I'm going from visual judgment.

Answer:

The most common example is the molar volume of a gas at STP (Standard Temperature and Pressure), which is equal to 22.4 L for 1 mole of any ideal gas at a temperature equal to 273.15 K and a pressure equal to 1.00 atm.If an ideal gas at a constant temperature is initially at a pressure of 3.8 atm and is then allowed to expand to a volume of 5.6 L and a pressure of 2.1 - 18914… ... of 5.6 L and a pressure of 2.1 atm, what is the initial volume of the gas? ... An ideal gas is at a pressure of 1.4 atm and has a volume of 3 L.

Explanation:

I hope I help :)

The correct answer choice from the statement above about investigated factors from lab results is :

Students who spend less time studying after school get lower math grade

Option D is the correct answer

This is an online platform where mathematics tutors help students to solve their difficulties in mathematics.

Mathematics is one of the most important aspect of knowledge in the education.

So therefore, The correct answer choice from the statement above about investigated factors from lab results is :

Students who spend less time studying after school get lower math grade

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The water molecules are split into hydrogen and oxygen gases by the electric current. Then, the gases of hydrogen and oxygen are released into the environment. Electrolysis is the name of this procedure.

The water molecules are disassembled by electrolysis using electricity into their component elements of hydrogen and oxygen, which are subsequently liberated as gases.

A procedure called electrolysis employs electric current to separate a substance into its constituent parts. In electrolysis, an electric current is used to drive ions in a solution towards electrodes, where they combine to generate a new molecule. The method is generally used to refine metals and other chemicals as well as to extract metals from their ores.

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The pOH of the remaining trimethylamine solution is 4.19 with 0.1000 M HCl(aq) after 7.99 mL of the acid has been added.

Given:

Initial volume of trimethylamine  = 30.00 mL

Initial concentration of trimethylamine = 0.1000 M

Volume of HCl(aq) added = 7.99 mL

Concentration of HCl(aq) = 0.1000 M

The balanced chemical equation is:

(CH₃)₃N(aq) + HCl(aq) → (CH₃)₃NHCl(aq)

The stoichiometry of the reaction is 1:1, meaning that for every mole of trimethylamine (CH₃)₃N reacted, one mole of HCl is consumed.

Moles of trimethylamine (CH₃)₃N reacted:

Moles of (CH3)3N = initial volume × initial concentration

= (30.00 mL / 1000 mL) × 0.1000 M

= 0.00300 moles

Moles of HCl reacted:

Since the stoichiometry is 1:1, the moles of HCl reacted are equal to the moles of (CH₃)₃N reacted.

Moles of HCl = 0.00300 moles

Moles of HCl remaining:

Initial moles of HCl = volume × concentration

= (7.99 mL / 1000 mL) × 0.1000 M

= 0.00799 moles

Moles of HCl remaining = Initial moles of HCl - Moles of HCl reacted

= 0.00799 moles - 0.00300 moles

= 0.00499 moles

Volume of remaining solution = initial volume - volume of HCl added

= 30.00 mL - 7.99 mL

= 22.01 mL

Concentration of (CH₃)₃N = moles of (CH₃)₃N remaining / volume of remaining solution

= 0.00300 moles / (22.01 mL / 1000 mL)

= 0.136 M

pOH = -log10(Kb)

pOH = -log10(6.5 x 10⁻⁵)

pOH = 4.19

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Answer:

La masa molar de la sustancia disuelta es de aproximadamente 138,473 g/mol

Explanation:

Los parámetros dados son;

La masa de benceno en el recipiente = 100 gramos

La masa de benceno que se evapora del benceno puro = 1.273 gramos

La masa del soluto no volátil disuelto en 100 gramos de benceno = 10 gramos

La masa de benceno que se evapora de la mezcla = 1.205 gramos

Según la ley de Raoult, tenemos;

\(P_ {solucion} = P_ {solvente} \times X _ {solvente}\)

Dónde;

\(P_ {solucion}\) = La presión de vapor de la solución.

\(P_ {solvente}\) = La presión de vapor del solvente

\(X_ {solvente}\) = La fracción molar del solvente

Por lo tanto;

\(X_ {solvente} = \dfrac {P_ {solucion}} {P_ {solvente}}\)

Según la ley de los gases ideales, tenemos;

\(P \times V = n \times R \times T = \dfrac{m}{M} \times R \times T\)

Dónde;

P = La presión del gas

V = El volumen ocupado por el gas

m = La masa del gas

M = La masa molar del gas

R = La constante universal de los gases

T = La temperatura del gas

n = El número de moles del gas

Por lo tanto;

\(P = \dfrac{m \times R \times T}{M \times V}\)

Donde R, T, M y V son constantes, tenemos P ∝ m

\(\therefore X_ {solvente} = \dfrac {P_ {solucion}} {P_ {solvente}} = \dfrac {Masa \ evaporada \ de \ solucion} {Masa \ evaporada \ de \ solvente} = \dfrac {1.205 \ g} {1.273 \ g} \approx 0.9466\)

\(X_ {solvente}\) ≈ 0.9466

\(X_ {solvente} = \dfrac {El \ numero \ de \ moles \ del \ solvente} {El \ total \ numero \ de \ moles \ de \ la \ solucion}\)

El número de moles del solvente, C₆H₆ = (Masa de C₆H₆) / (La masa molar de C₆H₆) = 100 g / (78.11 g.mol) ≈ 1.28025 moles

El número de moles del solvente, C₆H₆ ≈ 1.28025 moles

El número total de moles = El número de moles del solvente, C₆H₆ + El número de moles del soluto no volátil, \(n_ {soluto}\)

\(\therefore X_ {solvente} = 0.9466 = \dfrac {1.28025 \ moles} {1.28025 \ moles + n_ {soluto}}\)

0.9466 × (1.28025 moles + \(n_ {soluto}\)) = 1.28025 moles

1.21189 moles + 0.9466 × \(n_ {soluto}\) = 1.28025 moles

\(n_ {soluto}\) = (1.28025 - 1.21189)/0.9466 moles ≈ 0.07221635 moles

\(\therefore \dfrac {Masa \ de \ soluto} {Molar \ masa \ de \ soluto} = \dfrac {10 \ g} {Molar \ masa \ de \ soluto} \approx 0.07221635 \ moles\)

\(\ Masa \ molar \ de \ soluto = \dfrac {10 \ g} {0.07221635 \ moles} \approx 138.473 \ g / moles\)

La masa molar de la sustancia disuelta (el soluto) ≈ 138,473 g/mol

Answer:

the correct answers is "neutralize"

Explanation:

When an acid is related to a base or also called an alkali and they reach a pH of 7, this acid will be neutralized or it will be canceled as the question says.

This happens so it reaches an equilibrium between both compounds, where the solution medium where these two compounds are is NEITHER ACID NOR BASIC, that is why it is called NEUTRAL medium.

Whenever you read that the pH of a solution is balanced, a neutralized acid, or a ph7 it means that the solution is NEUTRAL.