Cant seem to figure this one out…

2H(g) + [tex]O_{2}[/tex] ⇒ 2H2O This equation obeys the law of conservation of mass.

The law of conservation of mass states that mass is neither created nor destroyed in chemical reactions. For example, carbon atoms in coal become carbon dioxide when burned. A carbon atom changes from a solid structure to a gas, but its mass remains the same.

In a chemical reaction, the mass of the chemical components before the reaction equals the mass of the components after the reaction. Therefore, for chemical reactions and low-energy thermodynamic processes in isolated systems, the total mass of reactants or starting materials must equal the mass of the products.

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Answer:

1, 3, 2

Explanation:

1 mole of N^2 so you have 2 N.

3 mole of H^2 so you have 6 H.

2 mole NH^3 so you have 2 N and 6 H

2N + 6H = 2N + 6H

Diatomic elements are elements that exist as pairs of atoms. Unlike other elemental substances, diatomic elements cannot exist as single atoms, but must exist as a pair of atoms bound together.

Elemental refers to an element or substance made up of one kind of atom, such as oxygen, carbon, or hydrogen. Elements are the basic building blocks of matter, and they are combined in different ways to form the molecules of different materials. Elemental substances are the most basic form of matter, and they are essential for life on Earth. There are currently 118 known elements, and they are found in nature and in many products. Each element has unique properties, and they can be used in different ways. For example, oxygen is essential for human respiration, while carbon is found in many materials, such as plastics and diamonds.

Examples of diatomic elements include nitrogen (N2), oxygen (O2), hydrogen (H2), chlorine (Cl2), fluorine (F2), and bromine (Br2).

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Answer: In the sweat and urine

Explanation:

Sodium is part of body's mineral. It will easily go out or lose when we we sweat and when we urinate. They lost from the body in form of water contained sodium.

When a water molecule is split, part of it is which used to make fuels is : a.) the electrons and protons from the hydrogen.

The water molecules break down into hydrogen and oxygen at the atomic level during thermolysis. For instance, around 3% of all H2O dissociates into different combinations of hydrogen and oxygen atoms at 2200 °C, primarily into H, H2, O, O2, and OH.

Water splitting is the chemical reaction where water is broken down into oxygen and hydrogen: 2 H2O → 2 H2 + O2

Efficient and economical water splitting could be a technological breakthrough that could underpin hydrogen economy, based on green hydrogen. A version of water splitting occurs in photosynthesis also but hydrogen is not produced.

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22.2 seconds will it take to selectively plate out of the cations current of 5.0 Amperes.

E∘cell=E∘cathode−E∘anode it is the formula for finding out the net cell potential of the electrolytic cell. We can write the cell reaction to solve the problem in the following way

1. Write down the (two half) reactions.

2. Balance the (half) reactions (Mass and Charge):

a. Start with elements other than H and O. b. Balance O by adding water.

c. balance H by adding H+.

d. Balancing charge by adding electrons.

(3. Multiply each half reaction to make the number of electrons equal.

4. Add the reactions and simplify.)

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Chlorine atoms that are present in 0.650 mol of ca(clo4)2 is : 7.83 *10^23.

Mass in grams of 1 mole of the substance is called the molar mass of a substance. We can obtain a substance's molar mass by summing the molar masses of its component atoms. We can use the calculated molar mass to convert between mass and number of moles of a substance.

As we know, one mole of any atom is equivalent to the Avogadro's number or 6.02 x 10²³ particles.

0.650 * 6.023 * 10^23 * 2

= 7.83 *10^23 chlorine atoms.

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Both concentration and conductivity increase when larger amounts of sugar in a beaker of water dissolves.

The volume of the resulting solution will be larger than one quart if you dissolve a cup of sugar in a quart of water. In comparison to distilled water, the concentration of solutes inside the cell is higher. Most of the time, a particular amount of solvent can only dissolve a specific maximum amount of solute. This maximum amount is specified as the solubility of the solute. Only solutions with charge carriers will be able to conduct electricity. Simply having polar molecules in the solution is insufficient. It must be able to transfer electrons between points with the least amount of interference.

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The pressure in the left intrapleural cavity changes when the valve was opened as : It went from negative number to zero and the pressure in intrapleural cavity equalized with the atmospheric pressure.

The pressure inside the pleural cavity is called as intrapleural pressure. It is characterized as negative pressure when the pressure inside the pleural cavity is typically only a little bit lower than the ambient pressure.

The external intercostal muscles and diaphragm contract during inspiration, expanding the thoracic cavity. As a result, the intrapleural pressure decreases, increasing the transpulmonary pressure and expanding the lungs.

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An alpha helix is a type of secondary structure in proteins. It is a right-handed, coiled-coil structure that is stabilized by hydrogen bonds between the peptide backbone amide nitrogen and carbonyl oxygens of every fourth residue.

1st residue hydrogen-bonded to 5th residue (that is, residue n is H-bonded to residue n+4) - Alpha Helix

All NH groups point in the same direction - Beta Sheet

successive R groups point in opposite directions - Beta Sheet

1st residue (that is, residue n is hydrogen bonded to residue n+3) - Beta Turn

All contains-NH hydrogen bonded to C=O - Alpha Helix

In summary, the first phrase describes an Alpha Helix, the second and third phrases describe Beta Sheets, and the fourth phrase describes a Beta Turn, the fifth phrase also describes an Alpha Helix.

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Answer:

To calculate the percent of copper in copper oxide, you would need to know the mass of copper in the compound and the mass of the compound itself. Once you have this information, you would divide the mass of copper by the mass of the compound and multiply by 100 to express the result as a percentage.

Example:

If the mass of copper in copper oxide is 40 grams and the mass of the compound is 100 grams, the percent of copper in the compound would be:

(40/100) * 100 = 40%

It should be noticed that this is an example, I don't have access to the chemical analysis of your copper oxide.

Explanation:

The statement given is true. No matter where you live or what the outside temperature is, you should always start your vehicle and let it warm up for a few minutes.

An object's thermal energy content is measured by its temperature, while heat is the movement of thermal energy between objects of different temperatures.

The average kinetic energy of all the atoms or molecules that make up matter defines temperature in chemistry. Not all materials have the same kinetic energy. A particle can be described using the kinetic energy distribution of the particle at a point in time.

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The complete question is as follows:

Regardless of where you live and what temperature it is outside, you should always start the vehicle and give it a few minutes to warm up. (True/False)

The molar mass of CCl4 is 153. 81 g/mol. '769.0 g' of CCl4 are needed to have 5.000 mol.

What is molar mass?

Molar mass is the mass of one mole of a substance. It is usually expressed in grams per mole (g/mol). The molar mass of a substance is calculated by taking the sum of the atomic weights of all of the atoms in the molecule multiplied by the Avogadro constant (6.022x10^23).

To find the number of grams of CCl4 needed to have 5.000 mol, use the formula:

Mass (grams) = Molar mass (g/mol) x Number of moles

Mass (grams) = 153.81 g/mol x 5.000 mol

Mass (grams) = 769.0 g.

'769.0 g' of CCl4 are needed to have 5.000 mol.

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2 moles of hydrogen (H2) are required to completely reduce 1 mole of cis-2,3,3- trimethylhepta-1,5-diene (C11H16).

Moles, in chemistry, is a unit of measurement used to express the amount of a substance. It is equal to 6.022 x 1023 atoms, molecules, ions, or other particles. In other words, a mole contains an exact number of particles, which is known as Avogadro's number. The mole is a convenient way to measure and compare large amounts of a substance. It is also used to measure the amount of energy released or absorbed in a chemical reaction.

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The order of [NO] is 2.

The rate law for a chemical reaction is an equation that describes how the rate of the reaction changes with respect to the concentrations of the reactants. In this case, the rate law for the reaction 2NO(g) + O2(g) → 2NO2(g) is Rate = k[O2][NO]^2.

The order of a reactant in a rate law is determined by the exponent to which its concentration is raised. In this case, the concentration of NO is raised to the power of 2, so the order of [NO] is 2. This means that the rate of the reaction is directly proportional to the square of the concentration of NO. Therefore, as the concentration of NO increases, the rate of the reaction will increase at a faster rate.

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The concentration which determines how much radiation is absorbed, increases together with the absorbance.

One factor that influences a sample's absorbance is concentration (c). It would be reasonable to suppose that more radiation will be absorbed as the concentration rises, raising the absorbance. As a result, the relationship between concentration and absorbance is straightforward.

Another component is the path length (b). The absorbance rises as the length of the radiation beam and the number of molecules in its path do as well. As a result, the concentration is inversely related to the distance traveled. As you are undoubtedly already aware from earlier experiences, a particular chemical species absorbs some wavelengths of radiation but not others.

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The complete question as follows

Why is absorbance directly proportional to concentration?

Answer:

Wind, Rain and Snow

Consequently, winds are stronger at higher elevations. Colder temperatures at higher elevations also create precipitation, because cold air can't hold as much moisture as warm air. Moisture condenses out of the air as snow and ice, and it falls back to the ground.

The factors that affect the weather and climate are latitude, altitude, wind, and distance from the sea.

Climate can be described as the long-term weather pattern in an area, averaged over 30 years. Climate is the mean as well as the variability of meteorological variables over months to millions of years.

Some of the meteorological variables that are used to measure are temperature, atmospheric pressure, humidity, wind, and precipitation. The climate can be defined as the state of the components of the climate system, including the atmosphere, cryosphere, lithosphere, and biosphere, and the interactions between them.

The climate is affected by its latitude, terrain, altitude, land use, and water bodies and their currents. Climates can be classified based on the average and typical variables, most temperature, and precipitation.  It is used in studying of the biological diversity and how climate change affects it.

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The reactivity of the element in the periodic table as me move from the left to right in the period it will decreases first and then it will increases.

In the periodic table , for the metals the reactivity of the decreases as we move across the period from left to the right. in the group it will increases as we move from the top to bottom.

In the periodic table for the non metals, the reactivity will increases as we move from left to the right in a period. in the group it will decreases as we move from top to the bottom.

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An ideal gas is a gas composed of a large number of identical molecules that obey the ideal gas law.

What do you mean by Gas?

Gas is a state of matter made of atoms and molecules that are not bound together, allowing them to move freely and take the shape and volume of their container. It is one of the four fundamental states of matter (the others being solid, liquid, and plasma).

The heat exchanged in a two-step process is given by

q = CpΔT + (P1V1 – P2V2)

where Cp is the specific heat capacity of the gas, ΔT is the change in temperature, P1 and V1 are the initial pressure and volume, and P2 and V2 are the final pressure and volume.

For the two-step process,

q = CpΔT + (2.00 atm x 6.40 L – 2.50 atm x 3.20 L)

For the one-step process,

q = CpΔT + (2.50 atm x 6.40 L – 2.50 atm x 2.56 L)

The difference in q for the two-step process and the one-step process is

q2 – q1 = (2.50 atm x 3.20 L – 2.00 atm x 6.40 L)

q2 – q1 = (7.68 L atm – 12.80 L atm)

q2 – q1 = -5.12 L atm

Since 1 L atm = 101.3 J, the difference in q for the two-step process and the one-step process is

q2 – q1 = -5.12 L atm x 101.3 J/L atm

q2 – q1 = -517.4 J.

Hence, the difference is -517.4 J.

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Answer:  yes

Explanation:

Chemical potential energy is energy stored in a substance because of its composition.

Answer:

True

Explanation:

Chemical Potential Energy Energy is the capacity for doing work or supplying heat. When you fill your car with gasoline, you are providing it with potential energy. Chemical potential energy is the energy stored in the chemical bonds of a substance.

The percentage composition of carbon is 19.37% and percentage of oxygen is 49.68% and percentage composition of hydrogen is 12.8%.

According to question,

6.20g of carbon, 4.10g of hydrogen and 15.90g of oxygen is present in total sample of methanol.

Total mass of methanol is=mass of carbon x 1+ mass of oxygen x 1+mass of hydrogen x 4

Total mass= 12x1+16x1+1x4

Total mass=32g

Now, to find the percentage composition of each element use the total mass and given mass of element.

The ratio of the amounts of each element to the sum of the individual element amounts present in the compound, multiplied by 100, is the definition of the percentage composition of a given compound. In this instance, the quantity is expressed in gram of the constituent ingredients.

Percentage composition[tex]=\frac{mass of an element}{total mass}*100[/tex]

Percentage composition of carbon=[tex]\frac{6.20}{32} *100[/tex]

On solving we get,

Percentage composition of carbon=19.37%

Percentage composition of oxygen=[tex]\frac{15.90}{32}*100[/tex]

On solving we get,

Percentage composition of oxygen=49.68%

Percentage composition of hydrogen=[tex]\frac{4.10}{32}*100[/tex]

On solving we get,

Percentage composition of hydrogen=12.8%

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TSO-C129 and TSO-C196 refer to non-WAAS GPS systems. TSO-C146 refers to WAAS-enabled GPS systems. If non-WAAS GPS is used for navigation and instrument approaches, all required alternate airports must have non-GPS approved operational instrument approach procedures.

TSO-C129 - Airborne Auxiliary Navigation Sensor for Global Positioning System equipment with airborne extensions. TSO-C196 – Auxiliary airborne navigation sensor for GPS units with airborne augmentation.

TSO certification means minimum performance standards for certain materials, parts and equipment used in commercial aircraft. Authorization to manufacture materials, parts, or equipment in accordance with TSO standards is referred to as TSO authorization.

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The correct response is b) N - H. Because nitrogen is one of the most electronegative elements in the periodic table, its bond with hydrogen will be the most polar of all.

A polar covalent bond is a covalent association in which the atoms' electron attraction is uneven, resulting in unequal electron sharing. In a polar covalent bond, also known as a polar bond, the distribution of electrons surrounding the molecule is no longer symmetrical. Polar covalent bonds have an unequal distribution of electrons. The difference in electronegativity between the two elements would be between 0.4 and 1.7. The electronegativity gap between polar and nonpolar bonds is less than 0.4.

In this case, the right answer is b) N - H. Because nitrogen is one of the periodic table's most electronegative elements, its bond with hydrogen will be the most polar of all.

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The mass in grams of 6.02×[tex]10^{23}[/tex]  N2 molecules is 9.24×[tex]10^{23}[/tex] gram.

This is because each molecule of N2 is composed of two atoms of nitrogen, which each have a mass of 14.0067 grams.

Thus, the total mass of 6.022×[tex]10^{23}[/tex] N2 molecules is calculated by multiplying the number of molecules by the mass of each molecule, which is 28.0134 grams.

14.0067×2=28.013grams

This gives us a total mass of

6.02×1023×28.0134=9.24×[tex]10^{23}[/tex] grams

Molar mass:

Molar mass is the mass of one mole of a substance. It is expressed in grams per mole (g/mol). It is calculated by adding up the atomic weights of all the atoms in a molecule or formula unit of a compound. It is a useful measure when calculating the mass of a substance, or when calculating stoichiometric ratios in a chemical reaction.

Therefore the mass of 6.022×[tex]10^{23}[/tex] N2 molecule is 9.24×[tex]10^{23}[/tex]grams.

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Answer:

Explanation:

There are several things to consider before using hot and cold compresses:

The condition being treated: Different conditions may require the use of hot or cold compresses. For example, hot compresses may be used to alleviate muscle pain, while cold compresses may be used to reduce swelling and inflammation.

The individual's sensitivity to temperature: Some people may be more sensitive to temperature changes and may need to use a compress that is not as hot or cold.

The duration of use: It is generally recommended to use hot compresses for no more than 20 minutes at a time, and cold compresses for no more than 15 minutes.

The potential for burns or frostbite: Hot compresses should not be used on skin that is broken or damaged, as they can cause burns. Cold compresses should not be applied directly to the skin for an extended period of time, as they can cause frostbite.

The individual's overall health: Individuals with certain medical conditions, such as circulation problems, should be careful when using hot and cold compresses and should consult with a healthcare professional before doing so.

Answer:

its correct answer is 22.4 grams

We used the formula percentage of iron magnetite=(Mass of Fe/Mass of Fe3O4)100%. We then calculated the percentages of iron magnetite (68%) and oxygen magnetite (32%).

Magnetite is a mineral and one of the most important iron ores, with the chemical formula Fe2+Fe3+2O4. It is a ferrimagnetic iron oxide that is attracted to a magnet and can be magnetized to become a permanent magnet. With the exception of extremely rare native iron deposits, it is the most magnetic of all naturally occurring minerals on Earth. Naturally magnetized pieces of magnetite, known as lodestone, will attract small pieces of iron, which is how ancient peoples discovered magnetism.

Magnetite is black or brownish-black with a metallic luster, has a Mohs hardness of 5-6, and leaves a black streak. Magnetite grains are very common in igneous and metamorphic rocks.

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If we need 18.9 grams of HCl for a reaction, and we have a 1.5 M solution of HCl, the mL of this solution should we use is 345.3 mL.

Given that :

mass of the HCl =  18.9 grams.

molar mass of the HCl = 36.45 g/mol

moles of the HCl = mass / molar mass

                             = 18.9 / 36.45

                             = 0.518 mol

the molarity of the HCl = 1.5 M

The molarity is given as:

molarity = moles / volumes

volume in L = moles / molarity

                    = 0.518 / 1.5

                    = 0.3453 L

                    = 345.3 mL

Thus, the volume is 345.3 mL.

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