The volume of a single molybdenum atom is 1.05*10^-23 cm^3. What is the volume of a molybdenum atom in micro liters

Answer:

don't know mass? or energy just search

Answer:

There are 1.205x10²³ particles in 0.2 moles.

Explanation:

In order to convert from moles to number of particles we need to use Avogadro's number, which states the number of particles contained in 1 mol:

Thus, there are 1.205x10²³ particles in 0.2 moles.

Answer:

Explanation:

Here, we want to get the mass of carbon (iv) oxide produced

We start by writing the equation of reaction as follows:

Now, we need to get the mass of propane that reacted

We can get that by multiplying the density of propane by its given volume

Mathematically, we have that as:

From here, we get the actual number of moles of propane that reacted

We can get that by dividing the mass by the molar mass of propane

The molar mass of propane is 44 g/mol

The number of moles is thus:

From the balanced equation:

1 mole of propane gave 3 moles of carbon (iv) oxide

104/44 mol will give x moles

We have the value of x as:

To get the mass of carbon (iv) oxide produced, we multiply the number of moles above by the molar mass of carbon (iv) oxide

The molar mass of carbon (iv) oxide is 44 g/mol

Thus, we have the mass as:

Answer: The final pressure inside the tank is 8.41 kPa.

Explanation: We can use the combined gas law to solve this problem, which relates the pressure, volume, and temperature of a gas:

(P1V1)/T1 = (P2V2)/T2

where P1, V1, and T1 are the initial pressure, volume, and temperature, respectively, and P2, V2, and T2 are the final pressure, volume, and temperature, respectively.

We are given P1 = 25.0 kPa, T1 = -50 C = 223 K, and V1 is unknown. We also know that the temperature decreases by a factor of three, so T2 = T1/3 = 223/3 K.

To find V2, we need to assume that the steel container is rigid and its volume remains constant. Therefore, V1 = V2, and we can cancel out the volume from the equation:

P1/T1 = P2/T2

Substituting the values, we get:

P2 = P1 * T2 / T1 = 25.0 * (223/3) / 223 = 8.41 kPa

Therefore, the final pressure inside the tank is 8.41 kPa.

Answer:

So if pressure of a gas is increased by 25%, the volume of a gas is decreased by 25%.

Explanation:

The density of the iron pyrite cube is 1.343 g/cm³.

Given,

Side of iron pyrite cube = 0.31 cm

Mass of iron pyrite = 0.040 g

The volume of iron pyrite cube = s³ cm³

Or, volume = 0.029791 cm³

We have to find the density of the sample.

Density is defined as the mass per unit volume. Or, it is the ratio of mass to the volume of the substance.

Using the formula for density, we get,

Density = mass/volume

Or, density = 0.40/0.029791

Or, density = 1.343 g/cm³

Hence, the density of the iron pyrite cube is 1.343 g/cm³.

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Answer:

5.00 moles O₂

General Formulas and Concepts:

Chemistry - Atomic Structure

Explanation:

Step 1: Define

3.01 × 10²⁴ molecules O₂

Step 2: Convert

\(3.01 \cdot 10^{24} \ mc \ O_2(\frac{1 \ mol \ O_2}{6.022 \cdot 10^{23} \ mc \ O_2} )\) = 4.99834 moles O₂

Step 3: Check

We are given 3 sig figs. Follow sig fig rules and round.

4.99834 moles O₂ ≈ 5.00 moles O₂

Answer:

Protons are one of the basic atoms.

Explanation:

Proton's charge: Positive (+)

Proton's location: Usually in the nucleus with neutrons

Proton's mass: 1.67262 × 10⁻²⁷ kg

Answer:

Location: nucleus

Charge: positive

Mass: one amu

Explanation:

Answer:

none of these statements is true

according to the question E) None of these statements is true.

The concentration of a chemical substance expresses the amount of a substance present in a mixture. There are many different ways to express concentration. Chemists use the term solute to describe the substance of interest and the term solvent to describe the material in which the solute is dissolved

Quantitative units of concentration include molarity, molality, mass percentage, parts per thousand, parts per million, and parts per billion.

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Answer:

The mass of oxygen that participates is 2.72g

Explanation:

Oxygen gas is O2.

O2 has the molar mass of approximately 32.

Mass can be calculated by multiplying the molar mass and the moles.

Moles = Mass/Molar mass

therefore, Mass= Moles*Molar mass

Which is equal to 32*0.085= 2.72g

Answer:

500J (joules)

Explanation:

since heat is is the product of mass, change in temperature, and specific heat, the solution can be found from the equation q = mcΔt, heat is 50 * .5 * 20 = 500J

The statement that "The volume of a gas sample mostly consists of empty space between the moving gas particles" is one of the assumptions of the Kinetic Molecular Theory regarding gases.

What is Collision?

There are different types of collisions, depending on the nature of the objects involved, the speed and direction of their motion, and the type of contact that occurs. For example, elastic collisions are those in which the total kinetic energy of the colliding objects is conserved, meaning that no energy is lost or gained during the collision. In contrast, inelastic collisions are those in which some of the kinetic energy is transformed into other forms of energy, such as heat or sound.

The Kinetic Molecular Theory is a model that describes the behavior of gases. One of the main assumptions of this theory is that gas particles are in constant random motion and move in a straight line until they collide with other particles or the walls of their container.

Another important assumption of this theory is that the volume of a gas sample mostly consists of empty space between the moving gas particles. This means that gas particles are assumed to be very small compared to the overall volume of the gas sample. Therefore, the particles do not occupy all of the available space in the container, but instead only occupy a small portion of it.

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It would take 22g of sodium hydroxide (NaOH) to make 16g of the antacid milk of magnesia (magnesium hydroxide).

In the field of chemistry known as stoichiometry, desired quantitative data is ascertained by using relationships between the reactants and/or products of a chemical reaction. Stoichiometry literally translates as the measure of elements because the Greek words stoikhein and metron both mean element and measure, respectively.

In a chemical reaction, the total mass of reactant and product are equal, according to the statement, and neither is generated nor destroyed. This is the stoichiometric law, and also the law of conservation of mass.

\(16 \mathrm{~g} \text { of } \mathrm{Mg}(\mathrm{OH})_2 \times \frac{1 \mathrm{molMg}(\mathrm{OH})_2}{58.3 g \mathrm{gg}(\mathrm{OH})_2} \times \frac{2 \mathrm{~mol} \mathrm{NaOH}}{1 \mathrm{molMg}(\mathrm{OH})_2} \times \frac{40 \mathrm{gNaOH}}{\mathrm{molNaOH}}=22 \mathrm{~g}\)

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The kinetic-molecular theory's true assertions are as follows:

If both containers' temperatures are the same, container A will have a higher pressure than container B.

Container A has a lower temperature than container B if the pressure in both containers is equal.

The molecules that make up a gas are always moving randomly, colliding with one another and the container walls, according to the kinetic molecular hypothesis. Remember that high temperature and low pressure are the only conditions in which perfect gases can exist.

The kinetic-molecular theory's true assertions are as follows:

If both containers' temperatures are the same, container A will have a higher pressure than container B.

If both are under pressure

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The discovery of a 2-million-year-old fossil would align with the existing understanding of Earth's geological history, as it falls within the timeframe of the Quaternary period.

If scientists found a fossil in the middle layer that was determined to be 2 million years old, they would not automatically conclude that Earth was younger or older than 2 million years. The age of the fossil would provide valuable information about the minimum age of the layer in which it was found, but it would not necessarily provide conclusive evidence about the age of the entire Earth.

To determine the age of Earth, scientists rely on a variety of dating methods, including radiometric dating of rocks and minerals, as well as the study of isotopes and geological processes. These methods provide estimates of Earth's age in the billions of years.However, it would not significantly alter the prevailing scientific consensus that Earth is approximately 4.5 billion years old. The age of Earth is based on a comprehensive body of evidence from multiple disciplines and dating techniques, and a single fossil would not overturn that understanding.

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The correct order of the five steps of the scientific method is as follows:

State problem

Form hypothesis

Conduct experiment

Interpret data

Draw conclusion.

The scientific method is a systematic approach used by scientists to investigate and understand the natural world. The five steps of the scientific method, in their logical order, are as follows:

State problem: In this step, the scientist identifies and defines a specific question or problem to be investigated. The problem should be clear and well-defined to guide the rest of the scientific process.

Form hypothesis: A hypothesis is a proposed explanation or prediction for the problem stated in step one. It is an educated guess that can be tested through experiments and observations. The hypothesis should be based on prior knowledge and observations.

Conduct experiment: In this step, the scientist designs and performs experiments to test the hypothesis. The experiment is carefully planned and executed, and data is collected through observations and measurements.

Interpret data: Once the experiment is completed, the scientist analyzes the collected data. This involves organizing, graphing, and statistically analyzing the data to identify patterns and trends.

Draw conclusion: Based on the interpretation of the data, the scientist draws conclusions about whether the hypothesis is supported or not. The conclusions should be objective and supported by evidence obtained from the experiment.

It's important to note that while these steps are presented in a linear order, the scientific process is often iterative, with scientists revisiting and refining hypotheses, conducting further experiments, and building upon existing knowledge.

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Answer:

The breaks follows the crystal structure

Explanation:

In crystalline solids, the atoms, ions or molecules are arranged in an ordered and symmetrical pattern that is repeated over the entire crystal. … This means that a crystalline solid will have a distinct melting point, because applying heat will break all the bonds at the same time

According to the forces of attraction, the break  follows the crystal structure characterizes a crystalline solid when it breaks.

Forces of attraction  is a force by which atoms in a molecule  combine. it is basically an attractive force in nature.  It can act between an ion  and an atom as well.It varies for different  states  of matter that is solids, liquids and gases.

The forces of attraction are maximum in solids as  the molecules present in solid are tightly held while it is minimum in gases  as the molecules are far apart . The forces of attraction in liquids is intermediate of solids and gases.

The physical properties such as melting point, boiling point, density  are all dependent on forces of attraction which exists in the substances.

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The molar mass of aluminum sulfate is 342.15 g/mol.

To find the number of moles in the solution, we first need to calculate the mass of aluminum sulfate present in 1 liter of the solution:

0.284 g/L x 1 L = 0.284 g

Then we can find the number of moles:

0.284 g / 342.15 g/mol = 0.000829 moles

Since we only have 396 mL of the solution, we need to adjust the number of moles accordingly:

0.000829 moles/L x 0.396 L = 0.000328 moles

Aluminum sulfate dissociates in water to form 3 ions: one aluminum ion (Al3+) and two sulfate ions (SO42-).

So for every 1 mole of aluminum sulfate dissolved, we get 1 mole of Al3+ ions and 2 moles of SO42- ions.

Therefore, in 0.000328 moles of aluminum sulfate, we have:

0.000328 moles of Al3+ ions

0.000656 moles of SO42- ions

To find the number of ions of each type, we can use Avogadro's number, which tells us the number of particles (ions, atoms, molecules) in 1 mole of a substance:

Number of Al3+ ions: 0.000328 moles x 6.022 x 10^23 ions/mol = 1.97 x 10^20 ions

Number of SO42- ions: 0.000656 moles x 6.022 x 10^23 ions/mol = 3.95 x 10^20 ions

Therefore, there are approximately 1.97 x 10^20 aluminum ions and 3.95 x 10^20 sulfate ions in 396 mL of 0.284 g/L aluminum sulfate solution.

The Number of atoms per unit cell for Ga = 4 atoms per unit cell. Number of atoms per unit cell for As = 4 atoms per unit cell. Volume density of Germanium in its unit cell = 4.35 × 10²² /cm³

According to published data, GaAs has a number density of 4.42 x 10²²atoms/cm³.

Because it is well known that Ga and As are essentially equally distributed throughout GaAs.

Ga's number density is equal to As's number density (2.21 x 10²² atoms/cm³).

Volume of the unit cell = (lattice parameter)³ = (5.65 × 10⁻⁸)³ = 1.804 × 10⁻²² cm³

a) Number of atoms per unit cell for Ga and As = number density × volume of unit cell = 2.21 × 10²² × 1.804 × 10⁻²² = 4 atoms/unit cell

b) Volume density = Number of atoms per unit cell/volume of unit cell

A germanium unit cell contains 8 atoms (from literature)

Volume of unit cell = (lattice parameter)³ = (5.65 × 10⁻⁸)³ = 1.804 × 10⁻²² cm³

Volume density = 8/(1.804 × 10⁻²²) = 4.35 × 10²² /cm³

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Photosynthesis is a chemical reaction it leads to the generation of oxygen and provides food for both plants and animals.

This is the process by which plants convert carbon dioxide and water into glucose and oxygen using energy from the sun. It is the basis for all life on Earth, as it provides the energy and oxygen necessary for life.

Photosynthesis is the process by which plants, algae, and some bacteria convert light energy from the sun into chemical energy in the form of glucose and other organic compounds.

This process is carried out by special structures called chloroplasts, which contain a pigment called chlorophyll that gives plants their green color.

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The energy of combustion for one mole of butane to be approximately 2888.81 kJ/mol.

To calculate the energy of combustion for one mole of butane (C4H10), we need to use the information provided and apply the principle of calorimetry.

First, we need to convert the mass of the butane sample from grams to moles. The molar mass of butane (C4H10) can be calculated as follows:

C: 12.01 g/mol

H: 1.01 g/mol

Molar mass of C4H10 = (12.01 * 4) + (1.01 * 10) = 58.12 g/mol

Next, we calculate the moles of butane in the sample:

moles of butane = mass of butane sample / molar mass of butane

moles of butane = 0.367 g / 58.12 g/mol ≈ 0.00631 mol

Now, we can calculate the heat released by the combustion of the butane sample using the equation:

q = C * ΔT

where q is the heat released, C is the heat capacity of the calorimeter, and ΔT is the change in temperature.

Given that the heat capacity of the bomb calorimeter is 2.36 kJ/°C and the change in temperature is 7.73 °C, we can substitute these values into the equation:

q = (2.36 kJ/°C) * 7.73 °C = 18.2078 kJ

Since the heat released by the combustion of the butane sample is equal to the heat absorbed by the calorimeter, we can equate this value to the energy of combustion for one mole of butane.

Energy of combustion for one mole of butane = q / moles of butane

Energy of combustion for one mole of butane = 18.2078 kJ / 0.00631 mol ≈ 2888.81 kJ/mol

Therefore, the energy of combustion for one mole of butane is approximately 2888.81 kJ/mol.

In conclusion, by applying the principles of calorimetry and using the given data, we have calculated the energy of combustion for one mole of butane to be approximately 2888.81 kJ/mol.

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Molarity : It is defined as the number of moles of solute present in one liter of solution.

Therefore, the molarity of solution is 3.33

A.  1.9 M

B.  0.0033 M

C.  1,875 M

D.  0.30 M

E. 3.3 M

Answer: Oxygen

Explanation: Its found on the periodic table as an element.

Answer:

a

Explanation:

Answer:

A

Explanation:

Density is the amount of space that atoms are compacted in a substance.Apr 25, 2017

The reaction is endothermic since the energy level of the products have are higher than that of the reactants.

The activation energy (AE) is the energy difference between the reactants and the transition state.

The change in energy E and the energy difference between the reactants and the products

The data given is as follows:

Reactants: 0 kJ/mol

AE forward 125 kJ/mol

AE reverse: 86 kJ/mol

Products: 39 kJ/mol

The values of ΔE forward and ΔE reverse are as follows:

ΔE forward = (39 - 0) kJ/mol

ΔE forward = +39 kJ/mol

ΔE reverse = (0 - 39) kJ/mol

ΔE reverse =  -39 kJ/mol

3. Given that Ea = 154 kJ/mol and ΔE = 136 kJ/mol

AE reverse = ΔE - AE forward

E = 136 kJ/mol - 154 kJ/mol

E = -18 kJ/mol

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dolphin and whales use echolocation

Answer:

Explanation:

Number of moles of propane:

=Mass in grams ÷ Relative molecular Mass

= 100/((12*3) + (1*8))

= 100 ÷ 44

= 2.2727

Mole ratio propane:carbon (IV) oxide = 1:3(from the equation)

Number of moles of CO2 = 3*2.2727 = 6.8181

Mass in grams = Relative molecular Mass * Number of moles

= 44 * 6.8181

= 299.9964 grams

A number of moles of propane:

Mass in grams ÷ Relative molecular Mass

= 100/((12*3) + (1*8))

= 100 ÷ 44

= 2.2727

Mole ratio propane:carbon (IV) oxide = 1:3(from the equation)

Number of moles of CO2 = 3*2.2727 = 6.8181

Mass in grams = Relative molecular Mass * Number of moles

=44 * 6.8181

= 299.9964 grams

Carbon dioxide is used as a refrigerant, in fireplace extinguishers, for inflating lifestyles rafts and life jackets, blasting coal, foaming rubber and plastics, selling the increased vegetation in greenhouses, and immobilizing animals earlier than slaughter, and in carbonated liquids.

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