2 PbS(s) + 3 0₂(g) → 2 Pb0(s) + 2

SO₂(g)

deltaH = -844 kJ/mol

deltaS-165 J/K

What is AG for the above reaction

at 0°C?

Answer:

Center of gravity.

Explanation:

After opening to trade, a capital-abundant country will export the capital-intensive good and both the country and its trading partners will be better off. Capital-intensive goods refer to those products that require more investment in machines, equipment, and technology for their production.

Since a capital-abundant country has a relatively higher amount of capital, it can produce these goods more efficiently than labor-intensive products. By exporting capital-intensive goods, the country can earn higher profits and increase its overall economic growth. Furthermore, the exporting of capital-intensive goods can also lead to improved economic conditions for its trading partners. These partners can purchase these goods at a lower price, as the exporting country can produce them at a lower cost. The importing of these goods will lead to an increase in consumption, investment, and overall economic growth in the importing countries.

In conclusion, the opening to trade can benefit a capital-abundant country through the exporting of capital-intensive goods, which leads to increased profits and economic growth. It also benefits the importing countries through the increased availability of these goods at a lower cost, leading to improved economic conditions.

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If the hydrogen gas is combusted and produces 645L of water vapor at 400 kelvin and 1.75 atm, 2796.96 g mass of the zinc is produced .

Using the ideal gas law equation:

PV = nRT

n = (PV) / (RT)

= (1.75 atm * 645 L) / (0.0821 atm·L/(mol·K) * 400 K)

= 42.71 moles

the balanced equation for the reaction between zinc and hydrochloric acid:

Zn + 2HCl -> \(ZnCl_{2}\)  + \(H_{2}\)

1 mole of zinc produces 1 mole of hydrogen gas. Therefore, the moles of zinc are also 42.71.

The molar mass of zinc is 65.38 g/mol.

Mass of zinc = moles of zinc * molar mass of zinc

= 42.71 moles * 65.38 g/mol

= 2796.96 g

Therefore, the mass of the zinc is 2796.96 grams.

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Answer:

14.8 g

Explanation:

step 1 You first have to convert the cm^3 to dm^3 by dividing the volume by 1000 then find the number of mols for Hydrogen gas

from there you can use the of moles for hydrogen to find the moles of the metal step 2

then step 3 you multiply the number of by The Mr or Fr giving you your mass

Answer:

She breached the feudal customs of the time, which hindered women's rights, by working to educate herself in subjects such as astronomy, mathematics, geography, and medicine. She was well known for her contributions in astronomy, mathematics, and poetry.  Zhenyi was a famous female scientist from the Qing dynasty.

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The process that correctly describes the growth in the number of ionized nitrogen molecules over time is D. The number of ionized molecules increases exponentially with each ionized molecule ionizing 3 other molecules every nanosecond.

Let's analyze the equation tN2 = 3⋅N, where N is the number of ionized molecules and t is the time in nanoseconds.

The equation states that the number of ionized molecules at time t is equal to 3 times the number of ionized molecules at the previous time step.

This implies that each ionized molecule ionizes 3 other molecules every nanosecond.

A physicist is studying the nature of static discharge by applying a voltage across a microscopic tube filled with nitrogen.

Static discharge is an event that takes place when there is a sudden flow of electric charge between two objects with different electrical potentials. This electric charge transfer results in a brief burst of electromagnetic energy (EMI or EMF), which can sometimes be observed as a visible spark in low-light conditions or heard as a crackling sound in high-quality audio systems.

The nature of static discharge is dependent on a variety of factors, including the composition of the material, the temperature and humidity, the electrical potential between the two objects, and the distance between the objects. Typically, static discharge occurs more frequently in environments with low humidity, such as during the winter months or in arid regions, as moisture acts as an insulator and prevents the buildup of electrical charge. In addition, materials that are good electrical conductors, such as metals, are more likely to experience static discharge than materials that are poor conductors, such as plastics or rubber.

Therefore, the correct description of the growth in the number of ionized nitrogen molecules over time is:

D. The number of ionized molecules increases exponentially with each ionized molecule ionizing 3 other molecules every nanosecond.

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Complete question is:

" physicist is studying the nature of static discharge by applying a voltage across amicroscopic tube filled with nitrogen molecules.Every nanosecond from then on, any ionized molecules willionize an additional number of molecules not already ionized, and ionization does not get lost.The equationtN2 3shows N, the number of ionized molecules, t nanoseconds after initiating a voltage.Which of thefollowing correctly describes the growth in the number of ionized nitrogen molecules over time?A.The number of ionized molecules increases linearly with each ionized molecule ionizing 2 other moleculesevery nanosecond.B.The number of ionized molecules increases linearly with each ionized molecule ionizing 3 other moleculesevery nanosecond.C.The number of ionized molecules increases exponentially with each ionized molecule ionizing 2 othermolecules every nanosecond.D.The number of ionized molecules increases exponentially with each ionized molecule ionizing 3 othermolecules every nanosecond."

Answer:

Kc = 50.5

Explanation:

We determine the reaction:

H₂  +  I₂   ⇄   2HI

Initially we have 0.001 molesof H₂

and 0.002 moles of I₂

If we have produced 0.00187 moles of HI in the equilibrium we have to know, how many moles of I₂ and H₂, have reacted.

           H₂     +      I₂      ⇄   2HI

In:     0.001       0.002           -

R:       x                 x                2x

Eq:  0.001-x    0.002-x      0.00187  

x = 0.00187/2 = 9.35×10⁻⁴ moles that have reacted

So in the equilibrium we have:

0.001 - 9.35×10⁻⁴ = 6.5×10⁻⁵  moles of H₂

0.002 - 9.35×10⁻⁴ = 1.065×10⁻³ moles of I₂

Expression for Kc is =  (HI)² / (H₂) . (I₂)

0.00187 ² /  6.5×10⁻⁵ . 1.065×10⁻³ = 50.5

Answer:

There are legal and ethical restrictions regarding human cloning.

Explanation:

Answer:

Scientists clone banana plants and not humans because there are legal and ethical restrictions regarding human cloning.

\(hope \: this \: helped \: you \: \)

Explanation:

=> The simplest form of

56

:

98

56:98 is

4

:

7.

4:7.

Step-by-step explanation:

Given ratio -

56

:

98

56:98

We have to reduce it to its simplest form,

For that, we have to find the GCD of the numerator as well as the denominator:

So, the GCD for

56

56 and

98

98 is

14.

14.

Now, divide both the numerator and denominator by the GCD:

=

>

56

÷

14

98

÷

14

=>

98÷14

56÷14

=

>

4

7

=>

7

4

Hence, the simplest form is

4

:

7.

Answer:

A.hydrogen

Explanation:

A normal hydrogen (H) atom does not have any neutrons in its tiny nucleus

Answer:

D a substance that increases the rate of a reaction without being used up itself in a reaction.

Explanation:

Examples are

ammonia synthesis ==> iron

sulfuric acid manufacture ==> nitrogen(II) oxide, platinum

cracking of petroleum==> zeolites

hydrogenation of unsaturated hydrocarbons ==> nickel, platinum, or palladium

I hope it helps

Answer:

Hey there!

The correct answer would be D. "a substance that increases the rate of a reaction without being used up itself in a reaction."

Hope this helps :)

Organic molecules are more diverse compared to inorganic molecules due to the unique properties of carbon, its ability to form covalent bonds with other elements, and the presence of functional groups, allowing for a wide range of molecular structures and chemical reactions.

Organic molecules are primarily composed of carbon atoms, which possess a unique ability to form strong covalent bonds with other atoms, including carbon itself. Carbon atoms can bond with up to four other atoms, enabling the formation of complex and varied molecular structures. This property, known as catenation, allows carbon to form long chains, branched structures, and ring systems, resulting in an immense diversity of organic compounds.

Furthermore, carbon atoms can also bond with other elements such as hydrogen, oxygen, nitrogen, sulfur, and phosphorus, forming functional groups. These functional groups significantly influence the chemical behavior and reactivity of organic molecules. They introduce specific characteristics and properties, such as acidity, basicity, polarity, and the ability to undergo various types of reactions. The presence of functional groups further expands the possibilities for molecular diversity in organic compounds.

In contrast, inorganic molecules typically lack the same level of structural complexity and diversity found in organic molecules. While inorganic compounds can exhibit a range of chemical properties and reactions, they are often limited by the nature of their bonding and the types of elements involved. Inorganic molecules predominantly involve ionic bonding, where electrons are transferred between atoms, resulting in simpler and more repetitive structures

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Answer:

14. C ,  15. C. 16. B , 17. D They are all right

Explanation:

No, the baby was not switched. The blood types of the parents and the baby are consistent with the inheritance patterns of blood types.


Blood type is determined by the presence or absence of certain antigens on the surface of red blood cells. There are four blood types: A, B, AB, and O. The father has blood type AB, which means he has both A and B antigens. The mother has blood type O, which means she has neither A nor B antigens.

Since the baby has blood type B, it means the baby inherited the B antigen from either the mother or the father. Since the father has blood type AB, he can only pass on the A or B antigen to the baby, but not both. Therefore, the baby must have inherited the B antigen from the father.

In conclusion, the baby's blood type is consistent with the blood types of the parents, indicating that there was no mix-up at the hospital. Keep in mind that blood type alone cannot definitively determine biological relationships, but in this case, it supports the parents' biological connection to the baby.

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The circumference of the table to the nearest tenth, given that the table has a diameter of 3 feet is 9.42 feet

The circumference of a circle is given by the follow formula:

C = 2πr

Where

With the above formula, we can obtain the circumference of the circular table as illustrated below:

C = 2πr

C = 2 × 3.14  × 1.5

C = 9.42 feet

Thus, we can conclude that the circumference is 9.42 feet

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In order to find a balanced equation in this question, we need to look at a reaction that presents the same number of the same elements on both sides of the reaction, and the option that presents this is:

Na2CO3 + 2 HCl -> 2 NaCl + CO2 + H2O

Letter D

Answer:

Explanation:

However, the model was misleading in several ways and ultimately destined for failure. The maturing field of quantum mechanics revealed that it was impossible to know an electron's position and velocity simultaneously. Bohr's well-defined orbits were replaced with probability “clouds” where an electron is likely to be.

Answer: To remedy the stability problem.

Explanation:Bohr modified the rutherford model by requring that the electrons move in orbits of fixed size and energy. Of an electron depends on the size of the orbit and is slower for smaller orbits  

Hope this helps

  "The elements Be, Mg, Ca, Sr, Ba And Ra are the alkali elements". Alkali metals are the elements found in Group 1 of the periodic table, which includes lithium (Li), sodium (Na), potassium (K), rubidium (Rb), cesium (Cs) and francium (Fr).

They have similar properties and are highly reactive with water and other substances. Beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), and radium (Ra) are not alkali metals; they belong to different groups on the periodic table.MgCl2 is magnesium chloride.

It is an ionic compound that consists of one magnesium ion (Mg2+) and two chloride ions (Cl-). The formula tells us that magnesium has a 2+ charge and chlorine has a 1- charge. Therefore, the correct statement is:1. In the periodic table, the families are the columns.2. The elements Be, Mg, Ca, Sr, Ba, and Ra are not the alkali elements.3. The compound MgCl2 is called magnesium(II) chloride.

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Answer:

it would represent sodium

Answer: its c im pretty sure

Explanation:

An aquifer receives 40 m 3 of precipitation and loses 10 m 3 of water through natural movement. 30 m³water can be pumped from the aquifer to balance the budget. Therefore, option C is correct.

An aquifer is a layer of unconsolidated materials, rock cracks, or water-bearing, porous rock that is underground. A water well can be used to obtain groundwater from aquifers. Aquifers come in a wide range of varieties.

Stormwater from precipitation and snowmelt seeps into the ground until it reaches layers of impermeable rock that prevent the water from passing through, storing it there instead. Stormwater that percolates into the soil replenishes aquifers' permeable rocks.

As a source of freshwater for metropolitan areas and agricultural irrigation, aquifers are crucial. Aquifers are located all over California, unlike surface water, which is mainly found in the state's northern and eastern regions.

The water pumped from the aquifer can be determined as follows;

10 + m = 40

m = 40 - 10

m = 30 m³

Thus, option C is correct.

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Temperature,as the temperature and therefore, kinetic energy,of a gas changes the ,the RMS speed of the gas molecules also changes

Answer:

C. Temperature

Explanation:

EDGE 2022

Answer is: the current solution is unsaturated.

Unsaturated solution means that more of a substance can be dissolve.

For example:

Solubility of potassium chlorate (KClO₃) at 100 grams of water at 80°C is 37.5 g, that means that all 37.5 g is completely dissolves, this is the saturated solution.

If we add 20 grams of potassium chlorate in 100 grams of water, there is less solute than the saturated solution, so this is unsaturated solution.

Answer:

silicon

Explanation:

Carbon and silicon BOTH come from Group 14 of the Periodic Table , i.e. both formally have the same number of valence electrons, 4 such electrons

Answer:

silicon

Explanation:

Carbon and silicon both come from Group 14 of the Periodic Table

Cyclohexene is B. The normal example for cyclohexene is found in the 1H⁻ NMR range, and the normal example for cyclohexene is found in the 13C⁻ NMR range.

The chemical formula for cyclohexene is C₆H₁₀. It shows a doublet of imperative 2 at 1.22 ppm, a septet of fundamental 1 at 2.86 ppm, a singlet of essential 1 at 5.34 ppm, a doublet of fundamental 2 at 6.70 ppm, and a doublet of basic 2 at 7.03 ppm. Cyclohexene exhibits six distinct signs in the 13C-NMR range: 23.9, 34.0, 115.7, 128.7, 148.9, and 157.4.

Cyclohexene is a hydrocarbon that is usually made by hydrogenating benzene. It is used as an industrial intermediate chemical to make tetrahydro benzoic acid, adipic acid, and malic acid and to steal oil.

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Answer:

F = 16.29 N

Explanation:

Given data:

Mass of cycle = 9.1 Kg

Acceleration = 1.79 m/s²

Force of bicycle = ?

Solution:

According to the Newton's second Law,

F = ma

F = force

m = mass

a = acceleration

by putting values,

F = 9.1 Kg × 1.79 m/s²

F = 16.29 N  ( N = Kgm/s²)

Answer:

(C) Both of these

Explanation:

A beam of electrons has both of these Wave properties and Particle properties.

The balanced equation for this reaction, including coefficients greater than 1, is as follows:

2 KOH + 2 HNO₃ → 2 KNO₃ + 2 H₂O

In this equation, we balance the atoms on both sides by adjusting the coefficients. Each side of the equation now has two potassium (K) atoms, two nitrates (NO₃) ions, and two hydroxides (OH) ions. The coefficients indicate the stoichiometric ratio between the reactants and products.

The reaction proceeds by the KOH, a strong base, reacting with HNO₃, a strong acid, to form KNO₃, a salt, and water (H₂O). The potassium ions (K⁺) from KOH combine with the nitrate ions (NO₃⁻) from HNO₃ to produce KNO₃, while the hydroxide ions (OH⁻) from KOH combine with hydrogen ions (H⁺) from HNO₃ to form water.

Overall, this balanced neutralization equation demonstrates the stoichiometry of the reaction, indicating that for every two moles of KOH and HNO₃, two moles of KNO₃ and two moles of H₂O are produced.

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The process of photosynthesis requires water and air in addition to grow ,obtain their energy from the sun  and supply oxygen to the environment .

It is defined as a process by which plants and other photosynthetic organisms convert the light energy in to chemical energy  through the process of cellular respiration.

Some of the energy which is converted  is stored in molecules of carbohydrates like sugar and starches  which are made up of from carbon dioxide and water . Photosynthetic organisms which can perform photosynthesis  are algae and cyanobacteria. Photosynthesis is largely responsible for producing and maintaining the content of oxygen in earth's atmosphere.

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