In what direction is the universe
moving?
1.condensing toward the center
2.expanding out from the center
3.at equilibrium with the center

(ANS1)— P4 + 5O2 ---> 2P2O5

(ANS2)— C3H8 + 5O2---> 3CO2 + 4H20

(ANS3)— Ca2Si + 4Cl2 ---> 2CaCl2 + SiCl4

Answer:

(ANS1)— P4 + 5O2 ---> 2P2O5

(ANS2)— C3H8 + 5O2---> 3CO2 + 4H20

(ANS3)— Ca2Si + 4Cl2 ---> 2CaCl2 + SiCl4

Explanation:

Answer: when gas is heated ,they gain more kinetic energy causing them to move faster.

Explanation: so as they gain kinetic energy they hit the walls of the container with more force thus causing pressure to increase

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Answer:

Iodine 131 is an unstable/radioactive isotope of iodine and a normal atom of iodine is stable.

Explanation:

Based on consumption of fossil fuels today, It can be predicted Fossil Fuels will eventually be used up and a new energy developed to supply energy needs of the world.

Fossil fuels are made from decomposing plants and animals.

These fuels are found in the Earth's crust and contain carbon and hydrogen, which can be burned for energy.

Coal, oil, and natural gas are examples of fossil fuels.

Above given fossil fuels are expected to be used up and a new energy developed to supply energy needs of the world.

Therefore, Based on consumption of fossil fuels today, It can be predicted Fossil Fuels will eventually be used up and a new energy developed to supply energy needs of the world.

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The result table indicate that A. The solute is a SOLID because it has a DECREASE in the amount dissolved as temperature decreases.

The solubility of a solid solute in a liquid solvent generally decreases as the temperature decreases. This is because the kinetic energy of the solute molecules decreases as the temperature decreases. As the kinetic energy of the solute molecules decreases, they are less likely to have enough energy to escape from the solution and enter the gas phase.

In the table, as the temperature decreases, the concentration of the solute in the solution decreases. This indicates that the solute is a solid and that the solubility of the solute decreases as the temperature decreases.

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In order to have a charge, an atom or molecule must have more electrons than protons, which is what creates an ion.

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Answer:

N3-

Explanation:

Answer: Steel wool turns from a gray color to a reddish color after it gets wet and then sits on a counter is a sign of chemical change.

Explanation:

A change that brings change in chemical composition of a substance is called a chemical change.

For example, Steel wool turns from a gray color to a reddish color after it gets wet and then sits on a counter is a chemical change.

This is because steel wool is mostly made up of iron and when iron becomes wet then in the presence of air it gets oxidized and therefore, it gets corroded.

This corrosion appears as reddish color of steel wool and it represents a chemical change has occurred in the steel wool.

Thus, we can conclude that steel wool turns from a gray color to a reddish color after it gets wet and then sits on a counter is a sign of chemical change.

Answer:

A I think

Explanation:

im not sure so do with that what you will

Answer:

What is a concentrated solution?

Concentrated solution is a solution that contains a large amount of solute relative to the amount that could dissolve.

xXxAnimexXx

Happy Labor day!

Answer:

1120 mm Hg

plus give brainliest

Answer:The empirical formula for this vitamin : C₃H₄O₃

Further explanation  

The empirical formula is the smallest comparison of atoms of compound =mole ratio of the components

The principle of determining empirical formula

Determine the mass ratio of the constituent elements of the compound.  

Determine the mole ratio by dividing the percentage by the atomic mass

Mass of C in CO₂ :(MW C = 12 g/mol, CO₂=44 g/mol)

Mass of H in H₂O :(MW H = 1 g/mol, H₂O = 18 g/mol)

Mass O = Mass sample - (mass C + mass H) :

mol ratio C : H : O =

Explanation:

The mass of nitrogen collected is mathematically given as

M-N2=0.025gram

Question Parameters:

A sample weighing 2.000g

the liberated NH3 is caught in  50ml pipeful  of H2SO4 (1.000ml   =  0.01860g Na2O).

T=26.3c=299.3K

Pressure=745mmHg=745torr

Pressure of N2=745-25.2=719.8torr

Generally, the equation for the ideal gas   is mathematically given as

PV=nRT

Therefore

719.8/760=45.6/1000=n*0.0821*299.3

n=0.00176*14

In conclusion, the Mass of N2

M-N2=0.00176*14

M-N2=0.025gram

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Directed movements toward or away from chemical or physical signals are known as taxis.

Taxis is a behavioral response exhibited by organisms to move in a particular direction in response to stimuli such as light, temperature, gravity, chemicals, or other external cues.

There are different types of taxis based on the nature of the stimuli and the direction of movement. For example:

Phototaxis: Movement in response to light. Organisms may exhibit positive phototaxis (moving towards light) or negative phototaxis (moving away from light).

Chemotaxis: Movement in response to chemical signals. It can involve positive chemotaxis (moving towards a chemical attractant) or negative chemotaxis (moving away from a chemical repellent).

Thermotaxis: Movement in response to temperature gradients. Organisms may move towards or away from specific temperature ranges based on their preferences.

Geotaxis: Movement in response to gravity. Organisms may exhibit positive geotaxis (moving towards gravity, like plant roots growing downwards) or negative geotaxis (moving away from gravity, like some microorganisms floating upwards in water).

Rheotaxis: Movement in response to fluid flow, such as swimming against or with the current.

These taxis responses allow organisms to navigate their environment, locate resources, avoid potential dangers, and optimize their survival and reproduction. Taxis behaviors are observed across various organisms ranging from bacteria and insects to higher animals, including humans.

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Answer:

To linearize the proteins

Explanation:

Laemmli buffer, which contains SDS, was added to fish samples to linearize the proteins by breaking up secondary and tertiary protein structure, ensuring that proteins will only move by size. Also, coats proteins to be electrically charged so it will migrate down the gel

Answer: The answer is B. The pressure inside the tires increased.

Explanation:

The relationship between the pressure, volume, and temperature of a gas is described by the ideal gas law, which is usually written as:

\($$PV = nRT$$\)

where:

- \(\(P\)\) is the pressure,

- \(\(V\)\) is the volume,

- \(\(n\)\) is the number of moles of gas,

- \(\(R\)\) is the ideal gas constant, and

- \(\(T\)\) is the temperature (in Kelvin).

In this case, the volume \(\(V\)\) and the number of moles \(\(n\)\) of air in the tires stay the same. The temperature \(\(T\)\) is increasing. Therefore, for the equation to remain balanced, the pressure \(\(P\)\) must also increase.

So, the answer is B. The pressure inside the tires increased.

Answer: 0.071 moles of excess reactant \((O_2)\) will be left over.

Explanation:

To calculate the moles, we use the equation:

\(\text{Number of moles}=\frac{\text{Given mass}}{\text {Molar mass}}\)

a) moles of \(NO\)

\(\text{Number of moles}=\frac{21.6g}{30.01g/mol}=0.720moles\)

b) moles of \(O_2\)

\(\text{Number of moles}=\frac{13.8g}{32g/mol}=0.431moles\)

\(2NO(g)+O_2(g)\rightarrow 2NO_2(g)\)

According to stoichiometry :

2 moles of \(NO\) require 1 mole of \(O_2\)

Thus 0.720 moles of  \(NO\) require=\(\frac{1}{2}\times 0.720=0.360moles\) of \(O_2\)

Thus \(NO\) is the limiting reagent as it limits the formation of product and \(O_2\) is the excess regaent.

moles of \(O_2\) left = (0.431-0.360) = 0.071 moles

Answer: its side ways

Explanation:

Number of atoms = (mass of section in grams / 55.9 g/mol) x (6.022 x 10^23 atoms/mol).

A general formula to calculate the number of atoms based on the given information. The formula is:
Number of atoms = (mass of section in grams / atomic mass of iron) * Avogadro's number
Using the atomic mass of iron given as 55.9 u and Avogadro's number as 6.02 x 10^23, one can calculate the number of atoms in the section given its mass in grams. To stay within the word count limit of 100 words, I cannot provide an exact calculation. Assuming the atoms in the section are predominantly iron with an atomic mass of 55.9 u, we can calculate the number of atoms. First, we need the mass of the section in grams. Convert this mass to moles using the atomic mass of iron (1 mole of iron = 55.9 g). Finally, use Avogadro's number (6.022 x 10^23 atoms/mole) to find the number of atoms.
Number of atoms = (mass of section in grams / 55.9 g/mol) x (6.022 x 10^23 atoms/mol)

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The great ocean conveyor belt is a model that describes how ocean currents circulate thermal energy around the Earth.

Thermal energy is a type of energy that is associated with an object's or system's temperature. It is the energy that is transferred between two systems or objects as a result of a temperature difference. Thermal energy can be transferred through three methods: conduction, convection, and radiation.

Conduction is the transfer of thermal energy through a material without the material itself moving. Convection is the movement of fluids such as air or water that transfers thermal energy. The transfer of thermal energy via electromagnetic waves, such as light or infrared radiation, is known as radiation.

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Answer:

No, you cannot.

Explanation:

Due to the Law of Conservation of Energy all chemical equations have to be balcned. The Law of Conservation of energy states that matter cannot be neither created nor destroyed. By having more atoms on either side, you are breaking this law.  

The highest solubility at a pH less than 7.

An aqueous solution is one in which water serves as the solvent. Chemical equations typically illustrate it by adding (aq) to the appropriate chemical formula. For instance, Na+(aq) + Cl would be used to represent a solution of table salt, or sodium chloride (NaCl), in water (aq).

For Caco (Calcium carbonate), solubility does change with pH. Calcium carbonate is a basic salt and is more soluble in acidic solutions. Therefore, you would expect the highest solubility at a pH of around 9, where the carbonate ion (CO32-) is the least likely to be protonated.

For Ba(OH)2 (Barium hydroxide), solubility does not change with pH. Barium hydroxide is a strong base and is highly soluble in water regardless of the pH. Therefore, there is no specific pH at which you would expect the highest solubility.

For PbCl2 (Lead chloride), solubility does change with pH. Lead chloride is a salt and is more soluble in acidic solutions than in neutral or basic solutions. Therefore, you would expect the highest solubility at a pH less than 7.

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Answer:

Option A (9.0) is the correct alternative.

Explanation:

The given values are:

Molarity,

= 1.5 M

Volume,

= 6000 mL

or,

= 6 L

As we know,

⇒ \(Molarity=\frac{Moles}{Volume}\)

or,

⇒ \(The \ moles \ of \ NaCl=Molarity\times Volume\)

By putting the values, we get

                                     \(=1.5\times 6\)

                                     \(=9 \ mol\)

According to the concept of significant figures,0.002  molecules of CO₂ per hundred molecules of air  are expressed as a concentration as 2 parts per thousand .

Significant figures are used for establishment  of a number which is presented in the form of digits. These digits give a meaningful representation  to the numbers.

The significant figures are the significant digits which convey the meaning according to the accuracy. These provide precision to the numbers and hence are called as significant numbers.There are rules for counting significant figures which are as follows:

1)All non-zero digits are significant .

2)All zeroes which occur between non-zero digits are significant.

3)All zeroes to the left and right of  a non-zero digit are not significant.

4) All zeroes on right  of decimal are significant if a non-zero number follows them.

5)All zeroes on right side of non-zero digit are significant.

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If Aldebaran were to explode tonight, it implies that we would see the explosion in 65 years.

In astronomy, a light-year is a system of measurement that shows the unit of length equivalent to the distance that light travels in one year in a vacuum or approximately 5.88 trillion miles. The distance traveled by light in one year is measured in light-years.

However, if the star Aldebaran is the eye of the bull to the constellation Taurus(the bull) and it is about 65 light-years away,  it implies that we would see the explosion in 65 years.

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Answer:

If this is for the "functional groups" question:

1. aldehyde

2. ketone

3. ester

4. carboxylic acid

Explanation:

Got them all right on edge.

The drop-down menus to identify the names of the structures in the table to the right

1. Aldehyde

2. Ketone

3. Ester

4. Carboxylic acid

A functional group in organic chemistry is a pool of atoms within molecules which bind jointly to react in predicted ways.

Examples of functional groups contain the group hydroxyl, ketone, amine, and ether.

Thus, these are the drop down menus.

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The modern periodic table, which organizes elements by their atomic structure and properties, is credited to Dmitri Mendeleev, a Russian chemist.

In 1869, Mendeleev developed the first periodic table based on the concept of periodicity, or the repeating patterns in chemical and physical properties of elements as they are arranged by increasing atomic number.

Mendeleev's periodic table organized elements into rows and columns, grouping elements with similar properties together.

He left gaps for undiscovered elements, and predicted their properties based on the patterns in the table.

Mendeleev's periodic table was a groundbreaking achievement in the field of chemistry, and it provided a basis for understanding the properties and behavior of elements.

It has undergone many revisions and improvements since its creation, but the basic organization and principles laid out by Mendeleev remain an essential foundation of modern chemistry.

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Answer:

Firms produce goods and services,which they sell to households in return for revenue.

Answer: Goods and Services

Explanation: