What is the movement of air from high-pressure areas to low-pressure areas? is the movement of air from high- pressure areas to low pressure areas.

Answer:

86.04 %

Explanation:

Data given:

mass of Al  = 160.0 g

actual yield Al₂O₃= 260 g

Theoretical yield = ?

percent yield ofAl₂O₃ = ?

Solution:

First we have to find theoretical yield.

So,

we Look at the balanced reaction

             4Al  + 3O₂ -----—> 2Al₂O₃

             4 mol                      2 mol

As 4 mole of Al give 2 mole of Al₂O₃

Convert moles to mass

molar mass of Al = 27 g/mol

molar mass of Al₂O₃ = 2(27) + 3(16)

molar mass of Al₂O₃ = 54 + 48

molar mass of Al₂O₃ = 102 g/mol

Now

             4Al         +       3O₂   -----—>     2Al₂O₃

        4 mol (27g/mol)                       2 mol (102 g/mol)

             108 g                                            204 g

108 grams of Al produce 204 g of Al₂O₃

So

if 108 grams of Al produce 204 g of Al₂O₃ so how many grams of Al₂O₃ will be produced by 160 g of Al.

Apply Unity Formula

              108 grams of Al  ≅ 204 g of Al₂O₃

              160 grams of Al ≅ X of Al₂O₃

Do cross multiply

              mass of Al₂O₃= 204 g x 160 g / 108 g

              mass of Al₂O₃ = 302.2 g

So the Theoretical yield of Al₂O₃ = 302.2 g

Now Find the percent yield of Al₂O₃

Formula Used

             percent yield = actual yield /theoretical yield x 100 %

Put value in the above formula

            percent yield = 260g / 302.2 g x 100 %

            percent yield = 86.04 %

percent yield of Al₂O₃ = 86.04 %

Final answer:

The theoretical yield is 302.3 grams of Al2O3, and the percent yield is 86.0%, found by comparing the actual yield of 260.0 grams to the theoretical yield.

Explanation:

The question asks us to calculate the theoretical yield and percent yield when burning aluminum (Al) to produce aluminum oxide (Al2O3). The mass of Al used is 160.0 grams, and the amount of Al2O3 produced is 260.0 grams.

To calculate the theoretical yield, we first need to use the stoichiometry of the balanced reaction:
4Al(s) + 3O2(g) → 2Al2O3(s).

Next, convert the given mass of Al to moles using its molar mass (27.0 g/mol):
(160.0 g Al) / (27.0 g/mol Al) = 5.93 moles Al

According to the stoichiometry, 4 moles of Al produce 2 moles of Al2O3, so:
(5.93 moles Al) x (2 moles Al2O3 / 4 moles Al) = 2.965 moles Al2O3

Then convert moles of Al2O3 to grams using its molar mass (101.96 g/mol):
(2.965 moles Al2O3) x (101.96 g/mol Al2O3) = 302.3 grams Al2O3

This is the theoretical yield. The percent yield is calculated as follows:
(Actual Yield / Theoretical Yield) x 100
(260.0 g / 302.3 g) x 100 = 86.0%

The chemist achieved an 86.0% percent yield.

Explanation:

When two or more substances react and form some new substance it is called as chemical reaction .

A + B --> C + D

(reactants )   (products )

Types of chemical reaction

we come across different types of reactions that occur in nature .

Out of them , combination is also one type

Combination reaction

It is a reaction ,when two or more reactants react to form single product .

i.e A+B-----AB(IN THIS ONE SINGLE PRODUCT IS FORMED )

LIKE : H₂+Cl₂------HCL

         (E)    (E)         (PRODUCT )

           SO₂+O₂----SO₃

             ©   (E)        (PRODUCT )

           CO₂+H₂O----H₂CO₃

In the above asked equation :

C₂H₂ + 2 H₂ --> C₂H₆

Final answer:

The reaction C2H2 + 2H2 → C2H6 represents a hydrogenation reaction, converting acetylene to ethane by adding hydrogen. This process, central to organic chemistry, often requires a catalyst and is foundational in the synthesis of various compounds.

Explanation:

The given reaction C2H2 + 2H2 → C2H6 is an example of a hydrogenation reaction, where hydrogen (H2) is added to another compound. In this specific case, the hydrogenation of acetylene (C2H2) results in ethane (C2H6). The process involves the breaking of the triple bond in acetylene and the formation of a single bond to incorporate the additional hydrogen atoms, converting it into ethane. This is a common type of chemical reaction in organic chemistry which often requires a catalyst such as platinum or palladium to proceed under milder conditions.

The importance of understanding reactions like these lies in their application in the synthesis of various organic compounds, which are foundational in fields ranging from pharmaceuticals to materials science. Stoichiometry, a crucial concept in such reactions, involves the calculation of reactant and product quantities, often expressed in moles, to ensure that a reaction proceeds efficiently and yields the desired product.

Answer:

Option A is correct: You have three times the number of particles that are in 12 grams of carbon-12

Explanation:

Data given:

3 moles of substance equal to how many particles of 12 g of carbon-12.

Solution:

First we find the number of particles in 3 moles of substance

Formula used

          no. of moles = no. of particles / Avogadro's number

Rearrange the above formula

         no. of particles = no. of moles x Avogadro's number . . . . . . . . (1)

Where

Avogadro's number = 6.022 x 10²³

Put values in above equation

      no. of particles = 3 x 6.022 x 10²³ (particles/mol)

      no. of particles = 1.8066 x 10²⁴ Particles

So,

3 mole of substance have 1.8066 x 10²⁴ Particles

Now

we have to find number of particles in 12 g of carbon-12

for this first find no. of moles

formula used

       no. of moles = mass in grams/ molar mass . . . . . (2)

molar mass of carbon = 12 g/mol

Put values in equation 2

       no. of moles = 12 g / 12 (g/mol)

       no. of moles = 1 mole

So,

12 g of carbon 12 equal to 1 mole.

According to Avogadro's law 1 mole of any substance consists of 6.022 x 10²³ number of particles.

So

1 mole carbon = 6.022 x 10²³ particles

and 3 mole of substance = 1.8066 x 10²⁴ Particles

It means that we have three times number of particles that are in 12 g of carbon-2

So, Option A is correct.

A. You have three times the number of particles that are in 12 grams of carbon-12.

Answer:

B

Explanation:

since heat was produced...its an exothermic reaction

we don't have a proof for conclude this is a combustion..also we dont have enough information to identify products...

Therefore My only conclusion is B

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Answer:

Synthesis

Explanation:

Reaction Given:

        NH₃+ HCI ------> NH₄Cl

Type of reaction = ?

Solution:

Look at the reactants and products of the reaction to know the type of reaction

          NH₃+ HCI ------> NH₄Cl

In this reaction two reactant combine and give 1 products.

Reactant of the reaction

NH₃ = Ammonia

HCl = Hydrochloric acid

Product of the reaction

NH₄Cl = Ammonium chloride

So,

That ammonia (NH₃) react with Hydrochloric acid (HCl) and produces salt.

in this reaction NH₃ is a week base and take a proton from HCl and form ammonium ion and Cl ion. these two ions in combine form gives a salt called ammonium chloride.  

Type of Reaction:

This is type of synthesis reaction, in which NH₃ and HCl combine and form a new compound that is ammonium chloride salt (NH₄Cl). As the synthesis reaction is that reaction in which two are more compounds or molecules combine and form a new compound.

Answer:

1. Double displacement reaction

2. precipitation reaction.

Explanation:

Part 1

Reaction Given:

          CH₃COOH + NaHCO₃ -----> CO₂ + H₂O+ Na⁺ + CH3COO−

Reaction Type = ?

Solution:

In this reaction two reactant combine and give 3 products.

This reaction occur in two steps

In step one acetic acid react with sodium bicarbonate and gives sodium acetate plus carbonic acid.

         CH₃COOH + NaHCO₃ -------> H₂CO₃ + CH3COONa

So, the above reaction is a double displacement reaction. where sodium of sodium carbonate replace hydrogen of acetic acid and vice versa.

In step two the cabonic acid decomposes in two components that is carbon dioxide and water.

         H₂CO₃ -----------> CO₂ + H₂O

The overall reaction is

      CH₃COOH + NaHCO₃ -----> CO₂ + H₂O + CH3COONa

As the CH3COONa exist in ions in solution so it can be written as

     CH₃COOH + NaHCO₃ -----> CO₂ + H₂O + CH3COO⁻ Na⁺

So, the overall reaction is a double displacement reaction.

This is a double displacement reaction, in which Hydrogen (H) of the first compound replace the Sodium (Na) of the other compound.

_________________

Part 2.

Reaction Given:

          CaCl₂ + 2 NaHCO₃ -------→ CO₂ + CaCO₃ + 2 NaCl + H₂O

Solution

In this reaction two reactant combine and give 4 products.

Reactant of the reaction

CaCl₂  = calcium chloride

NaHCO₃ = sodium bicarbonate

Reactant of the reaction

CO₂= carbon dioxide

CaCO₃ = calcium carbonate

NaCl = sodium chloride

H₂O = water

So,

the reactant of the reaction that is calcium chloride react with sodium bicarbonate combine and form calcium carbonate and salt along with water and the evaluation of carbon dioxide.

As in this reaction calcium carbonate is formed in the form of precipitates so it is a precipitation reaction.

So

This is a type of precipitation reaction.

Answer:

More energy will be released from the old substance than the new substance will need to form it's chemical bonds.

Explanation:

Given

Chemical A and Chemical B react in an exothermic reaction.

This means energy is released when they react to give products. The product formation also requires energy, which is got from the energy released when A and B reacts. The energy that is left after the formation of products is released as heat. So in order for a reaction to be exothermic, the energy released  by the reactants should be more than the energy required for the new chemical bonds to be formed to give the products.

Answer:

I think B correct me if im wrong

Explanation:

hope i helped

Explanation:

that is the answer for your question

Scientists discovered Earth's outer core is liquid because shear waves from earthquakes do not pass through it, while compression waves do. Inge Lehmann interpreted seismic data to confirm this structure. The core's heat is maintained by the radioactive decay of elements.

The question relates to how scientists discovered that Earth's outer core is liquid. Inge Lehmann played a pivotal role in interpreting seismological data from earthquakes. It was observed that shear waves, which cannot travel through liquid, do not transmit through the Earth's core, unlike compression waves, which do. This was key evidence indicating that the outer core was liquid.

Since shear or transverse waves are not transmitted through the Earth's outer core, but longitudinal waves pass through, it indicated differing properties consistent with a liquid outer core and a solid inner core. The Earth's core was found to consist of a liquid outer core surrounding a solid inner core, made of materials like iron and nickel. The composition and presence of these elements also led to the creation of Earth's magnetic field.

The substantial heat of the Earth's interior, despite the expectation of cooling over 4.5 billion years, is maintained by the radioactive decay of primordial elements. The density of the mantle rock increases with depth and occasionally is studied when ejected from volcanoes, bearing detailed chemistry for analysis.

A chemical change happened when the two substances were mixed together in the flask. It wasn't a physical shift because that involves transforming a pure substance's state into a solid, liquid, or gas.

Chemical synthesis, or, alternatively, chemical breakdown into two or more separate molecules, occurs when one material reacts with another to create a new substance. These processes are referred to as chemical reactions, and they are typically irreversible barring additional chemical reactions.

Chemical modifications are those in which a new substance with new chemical characteristics is created. Examples include the CO2 and other chemical reactions that occur when lemon juice and washing soda are combined.

A chemical change is characterized by a shift in temperature. To check for a temperature change during an experiment, one could dip a thermometer into a beaker or an Erlenmeyer flask. It is likely that a chemical change is taking place if the temperature rises, which it does in the majority of reactions.

Thus, A chemical change happened when the two substances were mixed together in the flask.

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Final answer:

A chemical change occurred when two chemicals were combined based on the formation of new substance (white flakes), temperature change indicating an exothermic reaction, and the production of gas (bubbles).

Explanation:

Based on the given information, a chemical change occurred when the two chemicals were combined. The evidence for a chemical change rather than a physical change is as follows:

Physical changes, such as the melting and boiling of pure substances, involve changes in state but do not result in the formation of a new substance or significant temperature changes as observed here.

The average kinetic energy of the particles is directly proportional to the

C) Kelvin temperature

Explanation:

The average kinetic energy of the particles in a substance is given by the equation:

[tex]KE=\frac{3}{2}kT[/tex]

where

KE is the average kinetic energy

[tex]k=1.38\cdot 10^{-23} J/k[/tex] is a constant, called Boltzmann constant

T is the absolute temperature of the substance, in Kelvin

From the equation, we see that the average kinetic energy of the particles is directly proportional to the

C) Kelvin temperature

This is because the Kelvin temperature gives a measure of the amount of motion of the particles in a medium: indeed, at absolute zero (= temperature of zero Kelvin), the particles in a substance have ideally no kinetic energy, and therefore T = 0).

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Answer: The 3 indicates the 3rd shell

Explanation:

Answer:

The answer is B.

Explanation:

This type of bond is formed when the electrons are shared equally between the atoms. This type of bond is termed as non-polar because of the electronegativity difference between the atoms is negligible.

The electrons in a bond between two iodine atoms are shared equally, resulting in a nonpolar covalent bond because both atoms have the same electronegativity and pull on the electrons to the same extent.

The electrons in a bond between two iodine atoms (I2) are shared equally, and since both atoms have the same electronegativity, they pull on the electrons to the same extent. This lack of asymmetry in the electrical charge distribution means that the resulting bond is nonpolar. Therefore, the correct answer to the question is: b. Equally, and the resulting bond is nonpolar.

When atoms like iodine, which are identical, form a covalent bond, they have the same tendency to attract shared electrons, resulting in an even distribution of electron density. This equal sharing of electrons characterizes a nonpolar covalent bond.

Answer: 0.0000332mol

Explanation: 1mole of CCl4 contains 6.02x10^23 molecules.

Therefore, X mol of CCl4 will contain 2 x 10^19 molecules i.e

Xmol of CCl4 = 2 x 10^19/ 6.02x10^23 = 0.0000332mol

Explanation:

we can find number of atoms in a given sample by the formula :

Number of atoms = Given mass /atomic mass  x Avogadro's number

or , it can be written as :

Number of atoms = given mass /atomic mass x 6.022 x 10²³

Now in above asked question , the values given are :

Mass of sample of gold = 72.04g

Atomic mass of gold : 196.6

Avogadro's number = 6.023 x 10²³

so, using the above formula we have :

Number of atoms = 72.04 /196.6 x 6.022 x 10²³

= 0.3664 x 6.022 x 10²³

=2.207 x 10²³ number of atoms

Answer:solid

Explanation:

Answer:

It is a solid because leafs aren't made of water or gas.

Answer:

24 hours

Explanation:

Frozen foods are foods that were put in a refrigerator. The essence of putting food in a refrigerator is to lower the rate at which microbes cause the spoilage of the food by lowering its temperature considerably.

After 24 hours, microbes must have commenced action on non-frozen ready to eat foods causing them to spoil in not more than 24hours.

Non-frozen ready-to-eat foods should be consumed within : 24 hours

Non-frozen foods are to be consumed within 24 hours, because microbes that causes the spoilage of foods starts acting on ready-to-eat foods, after 24 hours. ready-to-eat foods are foods are processed foods that can be consumed immediately. example : smoked fish and salads

Frozen foods are refrigerated in order to keep the temperatures of the foods below the allowable temperature in which microbes tend to act on ready-to-eat foods.

Hence we can conclude that Non-frozen ready-to-eat foods should be consumed within 24 hours.

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Answer:

Salt is ionic, and oil is covalent. If you add water, the salt will dissolve in the water, and the oil will float to the top. You could then skim the oil and start over with sugar. To double-check, you could even make sure the oil does not conduct electricity!

Explanation:

just took on edge 2020

Removing salt from oil is difficult and complex, requiring particular separation processes. In most domestic situations, it's more feasible to discard the oil and start fresh.

When you accidentally add salt to the oil instead of sugar, it becomes a bit problematic to remove it. This is because both oil and salt are not miscible with water and the salt has likely dissolved into the oil. Removing the salt would need a separation process, such as centrifuge separation or sequential filtration. Unfortunately, these methods are complex and usually not readily available in a typical domestic environment.

As a simple solution, it might be more feasible to discard the salted oil and start fresh. This would save time and ensure that no unwanted salty flavor is incorporated into your food preparation.

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The answer is a change in internal energy causes work to be done and heat to flow into the system.  

Explanation:

Answer:

i believe that the answer is a

Explanation:

Answer:

vot. tofu p f focpxe9d3dotc

Explanation:

circeicirct pupdtoxkr

Final answer:

Despite having strong C-H and C-Cl bonds, dichloromethane is liquid due to strong dipole-dipole intermolecular forces and van der Waals forces resulting from its considerable dipole moment and molecular size.

Explanation:

The question asks why dichloromethane is a liquid despite having strong carbon-hydrogen (C-H) and carbon-chlorine (C-Cl) bonds. While the individual molecular bonds within dichloromethane are indeed strong (due to significant differences in electronegativity between carbon, hydrogen, and chlorine), the phase state (gas, liquid, or solid) of a substance at room temperature depends on the intermolecular forces between its molecules, not just the strength of the bonds within individual molecules. Dichloromethane, having a considerable dipole moment due to its polar C-Cl bonds, exhibits stronger intermolecular forces known as dipole-dipole interactions. These interactions, though weaker than covalent bonds, are significantly strong enough to keep the molecules close together in a liquid state at room temperature. Additionally, the molecular weight and size of dichloromethane contribute to stronger van der Waals forces (or London dispersion forces), which further supports its liquid state. Unlike smaller molecules that might be gases at room temperature, dichloromethane has just the right balance of molecular weight and intermolecular forces to exist as a liquid.

Answer: 4.5 x 10e-7

Explanation: 450 x 1e+9 = correct answer

Multiply amount of nanometers by 1e+9 to get the approximate result in meters.

To convert 450 nanometers to meters, you multiply 450 by 10^-9 to give 4.5 x 10^-7 meters. This places it within the blue light section of the visible spectrum.

To convert a measurement from nanometers (nm) to meters (m), we should recall that 1 nanometer is equal to one billionth of a meter, or 10^-9 m. Therefore, to convert 450nm to meters, you multiply 450 by 10^-9 which gives you the answer of 4.5 x 10^-7 meters. That places it well within the visible spectrum of the electromagnetic spectrum, between 380nm and 740nm, specifically in the blue light range.

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Answer:

Yes, the unknown substance is the liquid ethylene glycol.

Explanation:

Here the density of the unknown substance is 69.22lb/f and the density of ethylene glycol, the liquid used in antifreeze is 1.1088g/ml

We know, 1g  = 0.0022lb

1ml= [tex]3.531 \times 10^{-5} ft^3[/tex]

Therefore, 1g/ml = 62.428[tex]lb/ft^3[/tex]

Since, the density of ethylene glycol = 1.1088g/ml

 = 1.1088 [tex]\times[/tex] 62.428 [tex]lb/ft^3[/tex]

= 69.22 [tex]lb/ft^3[/tex]

When the density of ethylene gas is converted from g/ml unit to [tex]lb/ft^3[/tex] unit, it is found to have the same value (69.22)Therefore, the unknown substance here is liquid ethylene glycol.

Answer:

8.8 cm³

Explanation:

Data given:

volume of Liquid = 0.0088 L

convert volume to Cubic centimeters

Solution:

There are number of unit in which volume can be measured

As

Liter is unit of volume represented by L

Cubic centimeters represented by cm³

liter is larger value then cm³

Now to convert L to cm³

As we Know

1 L = 1000 cm³

So

Apply unity formula

           1 L = 1000 cm³

           0.0088 L = x cm³

Do Cross multiplication

            x cm³ = 0.0088 L x 1000 cm³ /  1 L

            x cm³ = 8.8 L.cm³ /  1 L

            x cm³ = 8.8 cm³

So,

0.0088 L of liquid = 8.8 cm³

Final answer:

To convert 0.0088 liters to cubic centimeters, multiply by the conversion factor of 1,000. This yields a volume of 8.8 cubic centimeters.

Explanation:

In a fluid, the particles are still in close contact, so fluids have an unmistakable volume. In any case, in light of the fact that the particles can move about one another fairly openly, a fluid has no positive shape and takes a shape directed by its compartment.

To convert the volume of a liquid from liters to cubic centimeters, we can use the conversion factor that 1 liter is equivalent to 1,000 cubic centimeters (cm³). Since 1 milliliter (mL) is also equivalent to 1 cubic centimeter (cm³), we first convert liters to milliliters before converting to cubic centimeters.

The volume given is 0.0088 L. To convert this to milliliters, we multiply by the conversion factor:

0.0088 L × 1,000 mL/1 L = 8.8 mL

Now, since 1 mL is equal to 1 cm³, the volume in cubic centimeters is:

8.8 cm³

Answer:

Single Replacement reaction

Explanation:

Reaction Given:

            2Na + 2HCI ------> H₂ + 2NaCl

Type of reaction = ?

Solution:

Look at the reactants and products of the reaction to know the type of reaction

           2Na + 2HCI ------> H₂ + 2NaCl

In this reaction two reactant combine and give 2 products.

Reactant of the reaction

Na = Sodium

HCl = Hydrochloric acid

Product of the reaction

NaCl = sodium chloride

H₂ = hydrogen gas

So,

That sodium metal react with hydrochloric acid and produce salt and water gas

Type of Reaction:

This is a Single Replacement reaction, in which Sodium metal (Na) replace the Hydrogen (H) of the other compound and form Sodium Chloride salt (NaCl)  and hydrogen liberate in the form of gas.

Answer:Density

Explanation:

Answer:density

Explanation:

Answer:

7

Explanation:

Answer:

in ibs it is 1.918e-5 ibs

Explanation:

Answer:

NON-Renewable source of energy takes millions of years to renew whereas renewable renews in short duration of time.

Explanation:

Renewable resource are the resources which can be renewed in short duration of the time and can be used again and again without any threat of exhaustion whereas the Non-renewable resource cannot be renewed in short duration of time and takes millions of the years to renew and are made naturally in specific environment.

Some examples of the Non-renewable resources are coal, Petroleum, natural gas, fossil fuels etc.

Also Renewable energy includes Solar energy, Hydro energy, wind energy etc.

Non Renewable energy is limited to a certain time period of several years and will get exhausted after some time because of this we should shift to renewable source of the energy and conserve them for our future generations.

Two things that must be in circuits to make them work are a conductor and a voltage source.

Explanation:

There are tow main parts that helps all electric circuits to work. They are a conductor and a voltage source. Some of the other parts of circuits includes,switches and bulbs. The working of an electrical circuit is same as that of the human circulatory system. The blood is taken to all parts of human body with the help of the blood vessels in a circulatory system.

Same thing happens with an electrical circuit. This is responsible in taking current to all parts of an electrical system. In an electrical circuit electricity will flow from the voltage of high to low. A path should be there for conducting the electric power.

Answer:

d  v&n

Explanation:

its on edge!

Proportionality that applies to avogadro's law is V is propportional to n.

According to Avogadro's law, equal volumes of various gases each contain an equal amount of molecules at the same temperature and pressure. On the presumption of an ideal (perfect) gas, this experimental relation can be deduced first from kinetic theory of gases. For actual gases, the law is roughly applicable when temperatures and pressures are both low enough.

Avogadro's number, or even the Avogadro constant, is the precise quantity of molecules inside one gram-mole of such a material, defined as that of the molecular weight metric grams, which is equal to 6.022×10²³.

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