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Answer:

one atom of sodium has a mass of approximately 37.9968 x 10^-24 grams.

Explanation:

The atomic mass of sodium is approximately 22.99 atomic mass units. To convert from atomic mass units to grams, we multiply by the conversion factor of 1.6605 x 10^-24 g/atomic mass unit:

mass (g) = 22.99 atomic mass units * (1.6605 x 10^-24 g/atomic mass unit) = 37.9968 x 10^-24 g

So one atom of sodium has a mass of approximately 37.9968 x 10^-24 grams.

The mass percent of water in IrBr₃･4 H₂O is  14.4%.

To find the mass percent of water in  IrBr₃･4 H₂O, first determine the mass of water present in the compound and then divide it by the total mass of the compound and multiply by 100 to express the answer as a percentage.

Let's assume that the molecular weight of IrBr3•4 H2O is 500 g/mol. In that case, the mass of water present in the compound would be 4 x 18 g/mol (the molecular weight of water) = 72 g. The total mass of the compound is 500 g, so the mass percent of water in  IrBr₃･4 H₂O can be calculated as follows:

(72 g / 500 g) x 100 = 14.4%

So, the mass percent of water in IrBr₃･4 H₂O is 14.4%.

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The liters would we need to make the 1 M solution if we have 6 mol of sodium hydroxide of 6 L.

The moles of the sodium hydroxide = 6 mol

The molarity of the sodium hydroxide = 1 M

The expression for the molarity is as follows :

The molarity = moles / volume in L

The volume of the sodium hydroxide = moles / molarity

The volume of the sodium hydroxide = 6 / 1

The volume of the sodium hydroxide = 6 L.

Thus the volume of the sodium hydroxide is 6L in the 1 M of the solution.

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The distance between the two hydrogen atoms in a molecule of water is 0.00000000172 m, 1.72x10⁻⁹ m is the distance in scientific notation.

Scientific notation is defined as a way of writing very large or very small numbers. A number is written in a very scientific notation when a number between 1 and 10 is multiplied by a power of 10. Let's consider for example, 650,000,000 can be written in scientific notation as 6.5 × 10⁸.

Distance is basically defined as the distance, or separation, between two objects. An example distance is 5 feet between two tables. Distance is a scalar quantity.

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The balanced equation for the chemical reaction is:

NH₄NO₃ -> N₂O + 2H₂O

The balancing chemical equation is done by doing a head count of the different element present on both sides of the equation to ensure the are the equal.

This however is in line with the law of conservation of matter which states that matter can neither be created nor destroyed during a chemical reaction but can be transferred from one form to another.

Now, we shall the balance equation as shown below:

NH₄NO₃ -> N₂O + H₂O

There are 4 atoms of H on the left side and 2 on the right side. It can be balanecd by writing 2 before H₂O as shown below:

NH₄NO₃ -> N₂O + 2H₂O

Now the equationis balanced.

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in front of H2O for balance the hydrogen atoms: CH4 + O2 CO2 + 2H2O. A 2 can be placed  Oxygen gas on the left to balance the oxygen atoms: CH4 + 2O2 Carbon dioxide + 2H2O. Now the equation balances.

The equation that balances is CH4(g)+2O2(g)CO2(g)+2H2O. (g) Methane (CH4) and oxygen (O2) combine during combustion to form carbon dioxide (CO2) and water (H2O): CO2 + 2 H2O CH4 + 2 O2 The laws of mass conservation is observed in this reaction because nothing was actually generated or destroyed, only rearranged.

According to the hierarchy of carbon atom attachments, primary carbon is only tied to one carbon atom, secondary carbon is only attachment to two carbon, tertiary carbon is only connected to carboxylic acid group, and quaternary chlorine is only linked to carbon rings.

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The concentration at t = 300 s is  1.1 * 10^-30 M

The rate constant, also known as the reaction rate constant, is a constant of proportionality that relates the rate of a chemical reaction to the concentration of reactants. It is a measure of the speed at which a chemical reaction occurs and is dependent on temperature, pressure, and other physical and chemical factors.

The rate constant is represented by the symbol "k" and is usually expressed in units of reciprocal time, such as per second (s^-1).

We know that for the first order reaction;

ln[A] =ln [A]o - kt

[A] = final concentration at time t

[A]o = Initial concentration

k = rate constant

t = time taken

ln[A] = ln1 - 0.23 * 300

ln[A] = -ln69

[A] = e^-69

= 1.1 * 10^-30 M

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The term mole concept is used here to determine the moles of oxygen gas produced. When 6.50 moles of Calcium oxide decomposes, 3.25 moles of oxygen gas is produced.

One mole of a substance is that amount of it which contains as many particles or entities as there are atoms in exactly 12 g of carbon-12.

The given reaction is:

2 CaO → 2 Ca + O2

Here 2 moles of calcium oxide decomposes to give 2 moles of calcium and 1 mole of oxygen. So 6.50 moles CaO gives:

6.50 × 1 mol O₂ / 2 mol CaO = 3.25 mol O₂

Thus 3.25 mol O₂ is produced.

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A brass rod, a copper rod, an iron rod and a lead rod went into water with wax on top, an iron rod will rust first if lead stayed on the longest and copper for the least.

Rust is an iron oxide, which is a typically reddish-brown oxide created by the catalytic interaction of iron with oxygen in the absence of water or air moisture. Rust is often connected with the corrosion of refined iron and is composed of hydrous iron(III) oxides (Fe2O3nH2O) with iron(III) oxide-hydroxide (FeO(OH), Fe(OH)3).

Given enough time and the presence of oxygen and water, any iron mass may ultimately rust completely. A brass rod, a copper rod, an iron rod and a lead rod went into water with wax on top, an iron rod will rust first if lead stayed on the longest and copper for the least.

Therefore, an iron rod will rust first if lead stayed on the longest and copper for the least.

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The distance of the Earth from the sun in gigameters is 1.50 × 10⁻⁴ Gm

A unit conversion is the expression of the same property in a different unit of measurement. To convert kilometers to gigameters, you need to divide the number of kilometers by 10¹². Here's the formula: Gigameters = Kilometers / 10¹²

To convert the distance from kilometers to gigameters (Gm), divide the number of kilometers by 10¹².

So, 1.50 × 10⁸ km ÷ 10¹² = 1.50 × 10⁻⁴ Gm

Therefore, the distance from the Earth to the Sun is approximately 1.50 × 10⁻⁴ Gm.

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Answer:

1.50 Gm

Explanation:

The distance from the Earth to the Sun can be converted from kilometers to gigameters (Gm) by dividing by 10^9:

1.50 x 10^8 km / 10^9 = 1.50 Gm

So, the distance from the Earth to the Sun is 1.50 Gm.

ALLEN

As per the temperature, the molecules of a substance act differently. The melting point is -114.2 °C and The boiling point of hydrogen chloride (HCl) is -85.05 °C. The correct sketch in each set is as follows:

Thus, if the temperature is kept above  -85.05 °C, the molecules will be placed widely apart and will be in the gaseous state, revealing their properties.

If the temperature is between -114.2 °C and -85.05 °C, the molecules will be organized in layers capable of slipping over one another since they will be in a liquid state.

At last, the molecules will be arranged in an orderly manner because they will be in a solid state if the temperature is below -114.2 °C.

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Answer:

89.17 u.

Explanation:

he average atomic mass of funnium can be calculated as follows:

Atomic mass = (Relative abundance of first isotope * atomic mass of first isotope) + (Relative abundance of second isotope * atomic mass of second isotope)

Atomic mass = (50.69% * 78.92 u) + (100% - 50.69% * 80.92 u)

Atomic mass = 39.86 u + (49.31 u)

Atomic mass = 89.17 u

So, the average atomic mass of funnium is 89.17 u.

Answer:

α HC2H3O2 (aq) + β Ba(OH)2 (aq) → γ H2O (l) + δ Ba(C2H3O2)2 (aq)

Explanation:

To balance the equation, you need to make sure that the number of atoms of each element on both sides of the equation are equal. The balanced equation for the reaction between α moles of acetic acid (HC2H3O2) and β moles of barium hydroxide (Ba(OH)2) to produce γ moles of water (H2O) and δ moles of barium acetate (Ba(C2H3O2)2) is:

α HC2H3O2 (aq) + β Ba(OH)2 (aq) → γ H2O (l) + δ Ba(C2H3O2)2 (aq)

The total volume of sea water is 1.5 × 10²¹ L. The amount of gold in the whole volume is 6 × 10¹¹ g of gold. Then, if one gram rate $18.23, the total worth of gold is $ 1.09×10¹³.

Gold is a metal widely used in ornaments and other plating as well. It is excavating from the places where its minerals or ore can be found in abundant and it worth higher prize.

Given that, 2.6 ml or 0.0026 L of ocean water contains 4 × 10⁻¹⁰ g of gold. Then, 1.5 × 10²¹ g contains,

1.5 × 10²¹ ×4 × 10⁻¹⁰ /0.0026=  6× 10¹¹ g of gold.

Price of one gram of gold  = $18.23

then, price of the total amount 6× 10¹¹ g = 6× 10¹¹ g×$18.23 = $ 1.09×10¹³.

Therefore, the total price of gold in the world's ocean is $ 1.09×10¹³.

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According to law of conservation of mass, if mass of product is 58.3 g the mass of nitrogen is 28 g and that of cesium nitride is 30.3 g which sums up to 58.3 g.

According to law of conservation of mass, it is evident that mass is neither created nor destroyed rather it is restored at the end of a chemical reaction .

Law of conservation of mass and energy are related as mass and energy are directly proportional which is indicated by the equation E=mc².Concept of conservation of mass is widely used in field of chemistry, fluid dynamics.

Mass of cesium nitride= mass of cesium + mass of nitrogen, thus, mass of nitrogen = 14×2=28 g and that of cesium is 58.3-28=30.3 g.

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Answer:

0.0144 moles

Explanation:

To calculate the number of moles of gas in a volume of 4.5 liters, we use the ideal gas law, PV = nRT, where P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant, and T is the temperature in Kelvin.

First, we need to convert the temperature to Kelvin:

37°C = 37 + 273.15 = 310.15 K

Next, we can plug in the known values into the ideal gas law and solve for n:

PV = nRT

(1.00 atm)(4.5 L) = (n)(0.0821 Latm/mol K)(310.15 K)

n = (1.00 atm)(4.5 L) / [(0.0821 Latm/mol K)(310.15 K)] = 0.0144 moles

So, it would take approximately 0.0144 moles of gas to fill an average man's lungs.


ALLLEN

Answer:

0.124 moles

Explanation:

PV = nRT, can be used, where P is pressure, V is volume, n is the number of moles, R is the gas constant, and T is temperature in Kelvin.

Converting the volume to liters and temperature to Kelvin:

V = 45 L

T = 37°C + 273.15 = 310.15 K

Plugging these values into the ideal gas law:

1.00 atm * 45 L = n * 0.0821 Latm/mol/K * 310.15 K

Solving for n:

n = (1.00 atm * 45 L) / (0.0821 Latm/mol/K * 310.15 K) = 0.124 mol

So, it would take about 0.124 moles of gas to fill an average man's lungs.

Kc = 1.10 104 for the reaction detailed below. If the reaction starts with 0.200 M A with 0.150 M B, how much is the equilibrium level of C 

What does the word reaction mean?

Chemical reaction is the transformation of one or more substances—the reactants—into one or more additional substances—the products. Chemical elements or chemical compounds make up substances.

Where do reaction take place?

The Earth's geology, the atmosphere, the oceans, and a wide variety of intricate processes that take place in all life processes are rife with chemical reactions. Physical changes and chemical must be differentiated.

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Answer:

no answer

Explanation:

I wish I could help you, but go to your text book for reference

Both sugar and water are made of molecules and atoms.

A tiny or very small particle of a chemical element is known as an atom, which may or may not present independently. Molecules are defined as a groups of atoms has the bond fuse together which represents the smallest part of a compound. Two or more identical or different atoms are chemically bonded with each other.

The smallest particle of a material that has all of the physical and chemical properties of the material. Molecules are made up of only one or more than one atom. Sugar has a solid state of matter whereas water has a liquid state of matter. Sugar which is a solid has more hard particles as compared to water whereas a liquid has less compact particles.

So we can conclude that both are made of molecules and atoms.

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A student runs an experiment to figure out if the size of a wire changes how well it conducts electricity. The independent variable in this experiment is the multimeter. Therefore, option A is correct.

The amount by which an object impedes or resists an electric current is referred to as resistance. The flow of electrons is referred to as electric current. Consider an example of a person struggling to move from one shop to another in a crowded market.

Because a thin wire has fewer electrons to carry the current, its resistance is greater than that of a thick wire. The relationship between resistance and the area of a wire's cross-section is inversely proportional.

Thus, The independent variable in this experiment is the multimeter,option A is correct.

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Due to the strength of their conjugate acids, I would anticipate that I (ii), (iv), and (vi) would behave as bases if put in an aqueous solution. As both alternatives (a) and (d) contain the conjugate bases of weak acids, they are both accurate.

Strong acids' conjugate bases, such as (v) Br- and (vi) F-, cannot take any more protons since they are already fully deprotonated and cannot function as bases in aqueous solutions. Strong acids have conjugate bases that may receive protons and function as bases in aqueous solutions. These bases include I HCOO-, (ii) HCO3-, (iii) HSO4-, and (iv) H2PO4-. As both alternatives (a) and (d) contain the conjugate bases of weak acids, they are both accurate. Because (v) and (vi), which are conjugate bases of strong acids and cannot function as bases, are included in Option (b), it is wrong. Option (c) is untrue because it only accounts for the conjugate bases of strong acids and ignores those of weak acids.

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Answer The reaction shown below is a chemical reaction between aqueous calcium hydroxide (Ca(OH)2) and aqueous hydrochloric acid (HCl):

Explanation:

Ca(OH)2(aq) + HCl(aq) -> CaCl2 + H2O

This reaction is an example of a neutralization reaction. Neutralization reactions occur when an acid reacts with a base to produce a salt and water. In this reaction, the hydrogen ions from the hydrochloric acid react with the hydroxide ions from the calcium hydroxide to produce calcium chloride (CaCl2) and water (H2O). The reaction results in the neutralization of both the acid and the base, hence the name "neutralization reaction."

The partial pressure of the remaining air is 0.94 atm.

First, we'll convert the partial pressure of hydrogen sulfide from mmHg to kPa:

015.2 mmHg * (101.325 kPa / 760 mmHg)

= 0.020 kPa

Next, we'll find the sum of the partial pressures of carbon dioxide and hydrogen sulfide:

5.065 kPa + 0.020 kPa

= 5.085 kPa

Now we'll convert this sum to atmospheres:

5.085 kPa * (1 atm / 101.325 kPa)

= 0.05 atm

Finally, we'll subtract this sum from the total gas pressure to find the partial pressure of the remaining air:

0.99 atm - 0.05 atm

= 0.94 atm

So the partial pressure of the remaining air is 0.94 atm (to 2 sig figs).

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To break all the bonds in one mole of molecules with a bond dissociation energy of 1 eV, we would require around 5.80 x [tex]10^{26}[/tex] kJ of energy.

The bond dissociation energy of 1 eV is roughly 96.485 kJ/mol. To break all the bonds in one mole of molecules (6.023 x [tex]10^{23}[/tex] molecules), we would need to multiply the bond dissociation energy by Avogadro's number:

96.485 kJ/mol x 6.023 x [tex]10^{23}[/tex] molecules/mol = 5.80 x [tex]10^{26}[/tex] kJ/mol

Bond dissociation energy is the amount of energy necessary to break a chemical connection between two atoms. It is also known as bond energy or bond enthalpy. This energy is measured in kilojoules per mole (kJ/mol) and is released when the bond forms. The energies of bond dissociation can vary greatly depending on the type of bond being broken.

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Answer:

The velocity of sound in air is dependent on several factors, including temperature, pressure, and humidity. At a temperature of 38°C (100.4°F), the average velocity of sound in air is approximately 343 meters per second (m/s). However, it is important to note that this is just an approximation and the actual velocity can vary depending on the specific conditions. To get a more precise value, you may need to consider the effect of pressure, humidity, and other factors.

By dissolving the solute in the solvent while adding heat, a supersaturated solution can be created. At room temperature, a supersaturated solution contains more solute.

than can normally be dissolved in the solvent. This is accomplished by dissolving the solute in a hot solvent and then progressively chilling the solution to allow the excess solute to stay dissolved, resulting in a supersaturated solution. A solution can stay supersaturated until a seed crystal is begun, which is usually accomplished by adding solid to the solution or allowing the solvent to evaporate. The seed crystal acts as a surface for surplus solute to crystallize and exit solution. The surplus solute quickly crystallizes out of solution once a seed crystal is introduced, resulting in a saturated solution.

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substances, such as aluminum, copper is measured in J/mole C rather than J/gC. 18.0 g/mole times 4.18 J/gC results in 75.2 J/moleC.

The key is to always keep in mind that the specific heat of copper is lower than that of iron. You need to keep in mind that the heat of metal is higher than the heat capacity of copper. As a result, we can state that Q is identical to Late Mr. Delta T.

The temperature of the water equals 4.184 J/g-K due to the fact that there will be 4.184 megawatts in a calorie. Another way to define the ease that an item receives or loses heat.

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