I need help only with 2 questions please help me out thank you.The atom represented by the formula I is:IronIndiumPotassium Iodine

Hello, this is Bing. I can help you with your question. Based on the information I found on the web, **H2** can be broken down into its two atoms of hydrogen (H) by supplying enough energy to overcome the bond that holds them together⁴. This process is called **dissociation** and requires an energy equal to or greater than the **dissociation energy** of H2, which is about 436 kJ/mol⁴.

One way to break down H2 is by using **electricity** to split water (H2O) into hydrogen (H2) and oxygen (O2) through a process called **electrolysis**¹. In this process, water is decomposed into its elements by passing an electric current through it. The electric current is provided by a battery or another source of electricity and the water needs to have an **electrolyte**, such as salt or acid, added to it to make it conductive¹. Two electrodes, usually made of metal or other conductive material, are inserted into the water and connected to the battery. The electrode connected to the positive terminal of the battery is called the **anode** and the one connected to the negative terminal is called the **cathode**¹. When the electric current flows through the water, hydrogen gas bubbles form at the cathode and oxygen gas bubbles form at the anode¹. The overall chemical reaction for electrolysis of water is:

2 H2O → 2 H2 + O2

Another way to break down H2 is by using **heat** to cause a reaction between hydrogen and oxygen that produces water and releases a large amount of energy. This reaction is called **combustion** or **oxidation** and can be ignited by a spark or a flame³. The reaction is very fast and explosive and can be dangerous if not controlled. The overall chemical reaction for combustion of hydrogen is:

2 H2 + O2 → 2 H2O

I hope this helps you understand how H2 can be broken down and what methods are used to do so.

Answer:

4 Al(s) + 3 O₂(g) ⇒ 2 Al₂O₃(s)

Explanation:

Let's consider the unbalanced molecular equation when aluminum metal and oxygen gas combine to produce aluminum oxide. This is a combination reaction.

Al(s) + O₂(g) ⇒ Al₂O₃(s)

We can balance O  atoms by multiplying O₂ by 3 and Al₂O₃ by 2.

Al(s) + 3 O₂(g) ⇒ 2 Al₂O₃(s)

Finally, we multiply Al by 4 to get the balanced equation.

4 Al(s) + 3 O₂(g) ⇒ 2 Al₂O₃(s)

The volume of the water is obtained as 72 mL.

We know that the heat of vaporization is the heat that is required to raise convert the substance from the liquid state to the gaseous state. Now, we know that we can be able to find the energy from the use of the formula;

H = mL

H = heat that is required

m = Number of moles of the object

L = Heat of vaporization

We know from the problem that we have that;

H = 163 kJ

L = 40.66 kJ/mol

Then we would have;

Number of moles = H/L

= 163kJ/40.66 kJ/mol

=  4 moles

Mass of water = 4 moles * 18 g/mol = 72 g

Since the density of water = 1 g/mL

Volume = Density * mass

= 1 g/mL * 72 g

= 72 mL

Thus, the volume of the water that would be vaporized in the process that we have described is about a volume of 72 mL.

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Answer:

It is D. a second set of chromosomes is produced

Explanation:

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Answer:

\(H_2(g)+O_2(g)\rightarrow H_2O_2(g)\)

Explanation:

Hello!

In this case, since the formation reaction of a compound is undergone when the pure elements composing it are combined, for gaseous hydrogen peroxide, gaseous diatomic hydrogen and oxygen (standard state) must be combined in order to obtain the gaseous hydrogen peroxide as shown below:

\(H_2(g)+O_2(g)\rightarrow H_2O_2(g)\)

Whereas it is proved there are two hydrogen and oxygen atoms at each side of the chemical equation and therefore it is balanced.

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Answer:

a Binomial Naming System

Explanation:

Answer:

Gas D

Explanation:

liters at 30 °C

Answer:

respiration

Explanation:

Plants give out carbon dioxide not only at night but during the day too. It happens because of the process of respiration in which plants take in oxygen and give out carbon dioxide. As soon as the sun rises another process called photosynthesis starts, in which carbon dioxide is taken in and oxygen is given out.

Plants use photosynthesis to capture carbon dioxide and then release half of it into the atmosphere through respiration. Plants also release oxygen into the atmosphere through photosynthesis

If a chemical reaction or chemical change takes place, a solid substance appearing is an indication of chemical change taking place.

Chemical changes are defined as changes which occur when a substance combines with another substance to form a new substance.Alternatively, when a substance breaks down or decomposes to give new substances it is also considered to be a chemical change.

There are several characteristics of chemical changes like change in color, change in state , change in odor and change in composition . During chemical change there is also formation of precipitate an insoluble mass of substance or even evolution of gases.

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Answer:

The tension in the string is 78.73 N.

Explanation:

The tension in the string can be determined from the expression;

v = \(\sqrt{\frac{T}{m} }\)

where: v is the speed of the wave in the sting, T is the tension in the string and m is the mass per unit length of the sting.

Given that: v = 16.2 m/s, and m = 0.3 kg/m.

Then;

16.2 = \(\sqrt{\frac{T}{0.3} }\)

Square both sides to have,

\((16.2)^{2}\) = \(\frac{T}{0.3}\)

T = \((16.2)^{2}\) x 0.3

  = 252.44 x 0.3

  = 78.732

T = 78.732 N

The tension in the string is 78.73 N.

Answer:

b

Explanation:

Answer:2.9 grams

Explanation:i had this question

As a rough estimate, there may be several tens of possible resonance structures for tetraphenylmethane, depending on how you count them. However, it is not possible to give a precise number without a more detailed analysis of the molecule and its resonance structures.

Tetraphenylmethane is a molecule that consists of four phenyl groups bonded to a central carbon atom. Phenyl groups are aromatic ring systems that consist of six carbon atoms bonded in a ring, with one hydrogen atom bonded to each carbon atom.

In general, aromatic molecules can have multiple resonance structures, which are different ways of representing the bonding and electron distribution in the molecule using Lewis structures.

Therefore, There are several possible resonance structures for tetraphenylmethane, but the exact number will depend on how you count the different structures. For example, you could consider the resonance structures that differ in the position of the double bonds within the molecule, or you could consider the resonance structures that differ in the distribution of lone pairs of electrons on the central carbon atom.

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Answer: I believe it should be 224g.

Explanation: There are 40g for every one mole of NaOH, so multiply the two to get to 224. I hope that helps!

Mass of NaOH = 223.983 g

A mole is a unit of many particles (atoms, molecules, ions) where 1 mole is the number of particles contained in a substance that is the same amount as many atoms in 12 gr C-12  

1 mole = 6.02.10²³ particles  

While the number of moles can also be obtained by dividing the mass (in grams) by the molar mass of an element or molecule  

\(\tt \boxed{\bold{n=\dfrac{mass}{MW}}}\)

MW of NaOH = 39.997 g/mol

moles of NaOH= 5.6

Mass of NaOH :

\(\tt mass=mol\times MW\\\\mass=5.6~moles\times 39,997 g/mol\\\\mass=223.983~g\)

The molarity of the chloride ions in the final solution is 0.747 M.

Given:

1.60 g of solid NaCl to 50.0 mL of 0.100 M calcium chloride solution.

To find:

The molarity of chloride ions in the final solution.

Solution:

Molarity of the calcium chloride solution = 0.100 M

Volume of the  calcium chloride  solution = V = 50.0 mL

\(1mL=0.001 L\\\\V=50.0mL=50.0 \times 0.001 L\\\\= 0.050 L\)

Moles of calcium chloride = n

\(0.100 M=\frac{n}{0.050 L}\\\\n=0.100 M\times 0.050 L=0.005 mol\)

\(CaCl_2(aq)\rightarrow Ca^+(aq)+2Cl^-(aq)\)

Moles of chloride ions in solution = \(2\times 0.005 mol=0.010 mol\)

Mass of sodium chloride = 1.60 g

Moles of sodium chloride :

= \(\frac{1.60 g}{58.5 g/mol}=0.02735 mol\)

\(NaCl(s)\rightarrow Na^+(aq)+Cl^-(aq)\)

Moles of chloride ions coming from 1.60 grams of NaCl = 0.02735 mol

Total moles of chloride ion in the final solution:

\(= 0.010 mol+0.02735 mol=0.03735 mol\)

The molarity of the chloride ion in the final solution:

\(=\frac{0.03735 mol}{0.050 L}=0.747M\)

The molarity of the chloride ions in the final solution is 0.747 M.

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A balanced nuclear reaction equation indicates that there is a rearrangement during a nuclear reaction, but of subatomic particles rather than atoms. Nuclear reactions also follow conservation laws, and they are balanced in two ways: The sum of the mass numbers of the reactants equals the sum of the mass numbers of the products.

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Answer:

0.35 g/mL

Explanation:

Use the formula D = \(\frac{m}{v}\), where D is density, m is mass, and v is volume.

D = 4.9/14

D = 0.35

D = 0.35 g/mL

Answer

a. True

Explanation

If there was nothing to avoid from objects pulling towards one another many results may happen.

Iron (II) tetraoxosulphate (VI) is always prepared freshly to be used for analysis as iron undergoes  chemical change of oxidation from+2 to +3 oxidation state.

Chemical changes are defined as changes which occur when a substance combines with another substance to form a new substance.Alternatively, when a substance breaks down or decomposes to give new substances it is also considered to be a chemical change.

There are several characteristics of chemical changes like change in color, change in state , change in odor and change in composition . During chemical change there is also formation of precipitate an insoluble mass of substance or even evolution of gases.

There are three types of chemical changes:

1) inorganic changes

2)organic changes

3) biochemical changes

During chemical changes atoms are rearranged and changes are accompanied by an energy change as new substances are formed.

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The growth of the new plant depicts the asexual reproduction characteristic. The characteristic that describes the growth of the new plant in Stephan's mother cutting a twig from a rose bush and planting it in the soil is asexual reproduction.

Asexual reproduction is the mode of reproduction by which organisms generate offspring that are identical to the parent's without the fusion of gametes. Asexual reproduction is a type of reproduction in which the offspring is produced from a single parent.

The offspring created are clones of the parent plant, meaning they are identical to the parent.The new plant in Stephan’s mother cutting a twig from a rose bush and planting it in the soil depicts the process of asexual reproduction, which is the ability of a plant to reproduce without seeds. In asexual reproduction, plants can reproduce vegetatively by cloning themselves using their roots, bulbs, or stems.

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The brass is neither an element nor a compound but it can be a mixture.

Brass is an alloy of copper and zinc. It can be used achieve mechanical, electrical and chemical properties.

We can say that from the definition the brass is neither element nor the compound but it can be a mixture. Brass is a homogenous mixture of the metals Copper and zinc. The common percentage of the brass is 65% of cooper and 35% of zinc.

Brass is used for preventing the corrosion and also used for providing low friction. The brass is commonly used in locks, zippers, plumbing, electrical plugs and in sockets. The used of the brass is not widely range but it is commonly used for the decorating purposes.

So we can conclude that the brass is neither an element nor a compound but it can be a mixture.

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The valency of magnesium is 2 because it has two valence electrons in its outermost shell. Magnesium belongs to the second group of the periodic table, which means it has two electrons in its outermost shell or valence shell. In order to achieve a stable configuration, magnesium tends to lose these two valence electrons to form a positively charged ion with a charge of 2+. This makes magnesium a bivalent or divalent element with a valency of 2.

Answer:

Because the outer shell of magnesium contains 2 atoms

Answer:

Work done on the system is zero , hence no work is done since the process is isochoric. There is no work done if the volume remains unchanged. (Though the temperature rises, work is only accomplished when the volume of the gas changes.)

Explanation:

ISOCHORIC PROCESS - An isochoric process, also known as a constant-volume process, isovolumetric process, or isometric process, is a thermodynamic process in which the volume of the closed system undergoing the process remains constant through the process. The heating or cooling of the contents of a sealed, inelastic container is an example of an isochoric process. The thermodynamic process is the addition or removal of heat, the closed system is established by the isolation of the contents of the container, and the constant-volume condition is imposed by the container's inability to deform. It should be a quasi-static isochoric process in this case.

Hence , the work done in the system is zero.

The tile's suggested answers include amine, alcohol, carboxyl group, and halocarbon.

Hydrocarbons are organic substances comprised of hydrogen and carbon, and include petroleum, methane gas, and coal. Alkanes are both a highly combustible chemical and the main source of fuel in the planet. Its uses include diesel, jet fuel, propane, petrol, and petroleum, to name a few.

The most fundamental category of organic compounds is referred to as a hydrocarbon. As their name implies, they are exclusively made up of the elements hydrogen and carbon. Atoms surround one or more core carbon atoms in hydrocarbon molecules, which are branching or chain-like in shape.

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The complete question is-

Drag each tile to the correct image. Match each hydrocarbon class to its structure. carboxylic acid amine halocarbon alcohol.

Answer:

18 L

Explanation:

boyles law

P1V1 = P2V2

V2 = P1V1/P2

V2 = (.9 * 4)/.2

V2 = 18

This question is based on Boyle's law as temperature is constant. Boyle's law is derived from ideal gas equation only at constant temperature. Therefore, the new pressure is  18L.

Boyle's law is a law which states that at constant temperature, the pressure that is exerted by an ideal gas on the walls of the container is inversely proportional to the volume occupied that gas.

Ideal gas is a gas where there is no forces of attraction or forces of repulsion between the particles . The volume of container is equal to the volume occupied by the gas.

Mathematically, Boyle's law can be written as

P₁V₁ = P₂V₂

P₁=initial pressure

P₂=final pressure

V₁ = initial volume

V₂=final pressure

V₂ = P₁V₁/P₂

V₂ = (0.9 × 4)/0.2

V₂  = 18L

Therefore, the new volume is  18L.

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ANSWER

The process of a solid changing to a gas is called SUBLIMATION

The process of solid turning to liquid is called MELTING

EXPLANATION:

Sublimation is the transition of a substance directly from the solid phase to the gas phase without passing through the liquid phase.

This occurs when the particle of the solid acquires enough energy to completely overcome the force of attraction holding the solid particles together.

Example: dry ice in water changing directly to carbon dioxide gas

Therefore, the process of a solid changing to a gas is called SUBLIMATION

The process of solid turning to liquid is called MELTING

Answer:

Explanation:

Convection currents are driven by differences in temperature and density of materials. In the case of the Earth's weather patterns, uneven heating of the Earth's surface by the Sun creates temperature and density differences in the air, causing convection currents to form. Hot air rises and cool air sinks, creating a continuous flow of air that results in the movement of air masses, the formation of weather systems, and the distribution of heat across the Earth. This is why there are hotter and colder parts of the Earth, as well as weather patterns such as storms and winds.

Convection is a process by which heat is transferred through a fluid or gas (such as air). In the case of the Earth's atmosphere, this means that heat from the Sun is absorbed by the Earth's surface, which in turn heats up the air in contact with it. However, not all parts of the Earth's surface are heated equally - for example, the equator receives more direct sunlight than the poles. This leads to temperature and density differences in the air, which in turn create convection currents.

The basic process of convection works like this: when air is heated, it becomes less dense and rises. As it rises, it cools and becomes more dense, eventually sinking back down to the surface. This creates a circular motion of air, with hot air rising and cool air sinking, that we call a convection current.

In the context of the Earth's weather patterns, convection currents play a major role in the distribution of heat around the planet. For example, warm air rising from the equator creates a low-pressure zone, which draws in cooler air from the poles. This circulation pattern is what creates the trade winds, which blow from east to west in the tropics. Similarly, cold air sinking at the poles creates a high-pressure zone, which draws in warmer air from the tropics. This circulation pattern is what creates the westerlies, which blow from west to east in the mid-latitudes.

Convection currents also play a role in the formation of weather systems such as storms and cyclones. When warm, moist air rises rapidly, it can create a low-pressure area that draws in more warm, moist air. As the air rises, it cools and water vapor condenses into clouds, which can release large amounts of energy in the form of precipitation and wind. This is how thunderstorms and hurricanes form - they are essentially massive convection currents driven by the unequal heating of the Earth's surface.

So in summary, convection currents are driven by differences in temperature and density of materials, and are responsible for the distribution of heat and the formation of weather patterns on the Earth.

Answer:

1.53 atm

Explanation:

From the question given above, the following data were obtained:

Volume = constant

Initial pressure (P₁) = stp = 1 atm

Initial temperature (T₁) = 273 K

Final temperature (T₂) = 144 °C = 144 °C + 273 = 417 K

Final pressure (P₂) =?

Since the volume is constant, the final pressure can be obtained as follow:

P₁ / T₁ = P₂ / T₂

1 / 273 = P₂ / 417

Cross multiply

273 × P₂ = 417

Divide both side by 273

P₂ = 417 / 273

P₂ = 1.53 atm

Therefore, the final pressure (i.e the pressure inside the hot water bottle) is 1.53 atm.