structure of selective and nonselective dicopper (ii) sites in cumfi for methane oxidation to methanol

The number of liters of oxygen, O₂, required at STP to react with 11.2 liters of CH₄ to form only CO₂ and H₂O is 22.4 liters.

The number of liters of O₂ required at STP to react with 11.2 liters of CH₄ to form only CO₂ and H₂O is determined from the balanced equation of the reaction as follows:

The balanced equation of the reaction of O₂ at STP CH₄ to form only CO₂ and H₂O is given below:

CH₄ + 2 O₂ (g) ----> CO₂ (g) + 2 H₂O (g)

From the balanced equation of the reaction of O₂ at STP CH₄, 2 moles of  O₂ reacts with one mole of CH₄.

At STP, the volume of one mole of CH₄ is equal to 22.4 liters

The number of mole of CH₄ in 11.2 liters of CH₄ will be 11.2 / 22.4 = 0.5 moles

The moles of oxygen required will be 0.5 liters * 2 /1 = 1 mole of oxygen.

At STP, the volume of one mole of O₂ is equal to 22.4 liters.

Hence, 22.4 liters of oxygen are required.

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Answer:

Jupiter

Explanation:

Answer:

\(0.01molO_2\)

Explanation:

Hello there!

In this case, by considering the definition of molar solution as the moles of solute over volume in liters or cubic meters of solution, we can see that actually 10.0 L of the solution are equal to 10.0 dm³. In such a way, since the concentration is 0.001 mol / dm³, the moles of oxygen that are dissolved turn out to be:

\(0.001mol/dm^3 * 10.0dm^3\\\\0.01molO_2\)

Best regards!

Explanation:

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Answer:

x/2

Explanation:

X = 2 molecules of H2

For 2 molecules of H2, there's only 1 molecule of O2. Meaning, there's twice the amount of H2, so O2 = x/2 molecules.

I hope I'm understanding this question right.

Answer: 16.7 pounds of mercury

Explanation:

556 mL * 13.6 g/mL=

556 mL * 13.6 g/1 mL=

556 * 13.6/1=

556*13.6=

7561.6 g=

7561.6 g * 1 pound/453.592 g=    ==> 1 pound=453.592 grams

7561.6 * 1/453.592=

7561.6/453.592=

16.67=16.7 pounds of mercury

The measure of how densely a material is packed together is called density. As the mass per unit volume, it has that definition. The mass in pounds of mercury is 16.635 pounds.

The term "density" refers to the ratio between the volume (the amount of space an object or substance occupies) and the mass (the quantity of material it contains). Density can also be defined as the quantity of mass per unit of volume. A dense object is one that is both hefty and small.

Density is the measure of an object's mass per unit volume. Kilograms per cubic meter (kg/m³) is the SI unit for density.

Density = Mass / Volume

13.6 g/mL = (m) / (556 mL)

m = 13.6 g/mL × 556 mL

m = 7561.6 g

1 g = 0.0022 pound

7561.6 g = 16.635 pounds

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Answer:

what

Explanation:

Answer:

When two or more atoms chemically bond with each other, the resultant chemical structure is a molecule. The familiar water molecule, H2O, consists of two hydrogen atoms and one oxygen atom; these bond together to form water,  irdk but it's either C or D

Explanation:

hope this helps have a good rest of your day :) ❤

Answer:

Conduction is the transfer of energy from one molecule to the next by direct contact.

Convection is the movement of heat by a fluid such as air or water.

Radiation is the transfer of heat by electromagnetic waves.

Explanation:

Convection is known as the process of transferring energy or heat through a fluid (liquids or gasses) from high temperatures to low temperatures. Convection is known as one of the three types of heat energy transfer.  The other two types of heat energy transfer are conduction and radiation.  Conduction is known as the transfer of heat between anatomies that are directly touching each other.  while, during radiation, the energy is discharged in the shape of electromagnetic waves.

As for the molecular motion in liquids, it is the result of convective heat energy transfer. Furthermore, the movement of the molecules increases as the temperature of the molecules is increasing.  The result of this is that the molecules seem to move away from each other. The motion of the molecules is what is responsible for the transfer of heat.

Answer:

1 C₂H₆O

Explanation:

The given equation:

C₂H₆O + 3 O₂ ---> 2 CO₂ + 3 H₂O

Reactants: 2 carbon, 6 hydrogen, 7 oxygen

Products: 2 carbon, 6 hydrogen, 7 oxygen

As you can see, the amount of each element on both sides is identical. Therefore, the reaction is already balanced. This means that the coefficient in front of C₂H₆O is 1. When writing the equation, writing the one is insignificant and usually left out.

Answer:

C. Both are formed by the deposition of sediments.

Explanation:

Answer:

Calcuim

Explanation:

Ionic bonds can only happen with alloy/metal, chlorine, carbon and hydrogen are all on the non metal side of the periodic table.

Answer:

Calcuim

Explanation:

Answer:

P2 = 1125 mmHg

Explanation:

Gas Pressure Calculation

To solve this problem, we need to use the combined gas law, which relates the pressure, volume, and temperature of a gas under different conditions. The combined gas law is given by:

(P1V1)/T1 = (P2V2)/T2

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

Let's start by calculating the initial conditions:

P1 = 750 mmHg

V1 = 120 cm^3

T1 = 25°C + 273.15 = 298.15 K (temperature in Kelvin)

Now we can plug in these values and solve for P2:

(P1V1)/T1 = (P2V2)/T2

(750 mmHg x 120 cm^3) / 298.15 K = (P2 x 150 cm^3) / (40°C + 273.15)

Simplifying this equation, we get:

P2 = (750 mmHg x 120 cm^3 x (40°C + 273.15)) / (298.15 K x 150 cm^3)

P2 = 1125 mmHg

Therefore, the pressure of the gas would increase to 1125 mmHg if its volume increased to 150 cm^3 at 40°C.

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Answer: hope this helps

Explanation: Reduces the amount of dissolved oxygen in the water, making it challenging for aquatic life to breathe. Fish require more oxygen because their metabolic rate increases in warm water. Additionally, it may alter the timing of aquatic organisms' life cycles and breeding patterns, as well as the rates at which some species grow. The food chain may be disrupted, and the health of the ecosystem as a whole may suffer. In order to reduce their negative effects on aquatic life, power plants that release warm water into rivers need to be carefully regulated.

The gas inside the bubbles that form in the boiling water is H₂O(g).

The gas inside the bubbles that form in the boiling water is mostly water vapor. The bubbles in the water vapor start to form on nucleation sites. The water vapor bubbles start to form larger as the temperature increases because more liquid is being converted to gaseous form. Vapor-filled bubbles shrink and disappear completely.

Therefore, when water is boiling the physical state of water, liquid changes to another state of water which is gaseous.

Hence, the bubble that we see in boiling water is the gaseous form H₂O(g) of water.

The boiling water is the vaporous form H₂O(g) of boiling water.

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According to the given equation, 2C4H10 + 1302 — 8CO2 + 10H, 2 moles of O are required to react with 4.71 moles of C4H10.

The number of moles of a compound can be calculated stoichiometrically as follows:

The balanced chemical equation is given as follows:

2C4H10 + 1302 — 8CO2 + 10H

Based on the above equation, 2 moles of C4H10 reacts with 13 moles of O

Therefore; 4.71 moles of C4H10 will react with 4.71 × 6.5 = 30.62 moles of O

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Answer: 30.6

Explanation:

Assuming the gas in question behaves as an ideal gas, we can use the Ideal Gas Law:

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 absolute temperature.

We have to match the units from R and the other variables.

The pressure is in kPa, so we can look for a R value that is also in kPa.

One such value is:

But the volume unit is in L, so we need to convert the volume we have:

Now, we have:

Solving the equation for T and substituting the values, we have:

So, the temperature is approximately 85.7 K.

The activity of the sample containing 1.00 µg of radioactive 223Ra is 5.14 x 10^-5 curies.

We will use the equation

Activity = (number of radioactive nuclei) x (decay constant)

The number of radioactive nuclei can be found using Avogadro's number, which gives the number of atoms in a mole of substance.

For 223Ra, the number of atoms in 1.00 µg (or 1.00 x 10^-6 g) is:

(1.00 x 10^-6 g) / (223 g/mol x 6.022 x 10^23 atoms/mol) = 2.69 x 10^14 atoms

The decay constant is found as:

t1/2 = 11.4 days = 9.84 x 10^5 seconds (since 1 day = 8,6400 seconds)

λ = ln(2) / t1/2 = 7.05 x 10^-9 s^-1

In conclusion, the activity of the sample is:

Activity = (2.69 x 10^14 atoms) x (7.05 x 10^-9 s^-1) = 1.90 x 10^6 Bq

When converted to curries, we have:

Activity = (1.90 x 10^6 Bq) / (3.7 x 10^10 Bq/Ci) = 5.14 x 10^-5 Ci

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Lead (Pb) has a molecular mass of 207.2 g and 6.02 1023 atoms.

Lead (Pb) has a molecular mass of 207.2 g and 6.02 1023 atoms.It takes 6.022 1023 units of a chemical to make up one mole (such as atoms, molecules, or ions).

Avogadro's number or Avogadro's constant are both designations for the number 6.022 1023.

The MOLE (mol) is a unit of measurement that represents the amount of a pure substance that has exactly as many atoms as there are in exactly 12 grams of carbon-12 (including atoms, molecules, etc). (i.e., 6.022 X 1023). Mol is the symbol for the unit.

The number of moles formula is denoted by the following.

Given.

Formula for the number of moles.

Number of moles = mass of substance / mass of a mole.

86.94 / 95 = number of moles.

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Answer: pure water is homogeneous and pure substance.

Explanation: However, when a homogeneous substance consists of two or more different types of molecules uniformly intermingled with one another, then it’s called a homogeneous mixture. A mixture’s composition can vary, but a pure substance does not.

Answer:

True

Explanation:

since the gases and minerals dissolved in water are in the same state as water and they do not form separate layers

The Kc of the system is 1.29 * 10^22.

We know that the equilibrium constant has to do with the kind of constant that we can be able  to use to the conversion of the reactants to the products in the course of the reaction.

We know that;

Kp= Kc (RT)^Δn

Kp = Equilibrium constant in terms of pressure

Kc = Equilibrium constant in terms of concentration

R = gas constant

T = temperature

Δn = change in the number of moles

Then;

Kc = Kp/ (RT)^Δn

Kc = 7.7x10^24 /(0.082 * 298)^2

Kc = 1.29 * 10^22

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The sample that uses the substance that Jacob and Natalie should use to make a cold pack that will do the best job of keeping food cool is sample 2, because it absorbs the most energy (option B).

Endothermic refers to a chemical reaction that absorbs heat energy from its surroundings. This ensures that the temperature of the surroundings is cool or has a lower temperature.

According to this question, Jacob and Natalie are asked by their science teacher to design a warming or cooling device. They make use of certain substances, however, sample 2 has the lowest final temperature of -4°C.

This shows that sample 2 absorbs the most energy, hence, would be the best for keeping the food cool.

The incomplete question is as follows:

Jacob and Natalie are asked by their science teacher to design a warming or cooling device. They decide to design a cold pack that can be used to help keep food cool. Jacob and Natalie read about different substances that can be used inside cold packs and learn that most cold packs use endothermic reactions to cool objects.

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Answer:

Neutrons - 5

Protons - 4

Electrons - 4

Explanation:

Beryllium (Be) is the 4th element on the Periodic Table.

It has 4 protons and 4 electrons (neutral charge)

Atomic Mass = # of Protons + # of Neutrons

9 = 4 + x

x = 5 Neutrons

Answer:

it defuse at a rate of 0.0002 m/s

Answer:

Compound 1 is a molecular compound

Compound 2 is an ionic compound

Compound 3 is a molecular compound

Explanation:

Let us review the properties of ionic and molecular compounds.

A molecular compound has a low melting and boiling point. This is as a result of weak intermolecular forces. Also, molecular compounds do not conduct electricity both in solid and liquid state because they are composed of molecules and not ions.

On the other hand, ionic substances have very high melting and boiling points. They are very strong solids that often have a dull appearance and do not conduct electricity in the solid state.

Compounds 1 and 3 have the properties of molecular substances hence they are classified as such. Compound 2 displayed the properties of an ionic substance hence it is classified as such.

Answer: I think its C I dont know  

Explanation: hApPy NeW yEaRsSsSs.

The total mass of the balloon and its content is 1521.17 g, the number of moles of CO₂ in the balloon is 34.15 mol, and the number of CO₂ molecules in the balloon is 2.06 x 10²⁵ molecules.

a) The molar mass of CO₂ is 44.01 g/mol. To find the total mass of the balloon and its content, we need to add the mass of the balloon (20g) to the mass of the CO₂ inside the balloon.

Mass of CO₂ = number of moles of CO₂ x molar mass of CO₂

Since the balloon is at STP (standard temperature and pressure), we can use the molar volume of a gas at STP (22.4 L/mol) to find the number of moles of CO₂ in the balloon:

Volume of CO₂ = Volume of balloon = 765 L (at STP)

Number of moles of CO₂ = volume of CO₂ / molar volume of a gas at STP

                                          = 765 L / 22.4 L/mol

                                          = 34.15 mol

Mass of CO₂ = 34.15 mol x 44.01 g/mol

                       = 1501.17 g

Total mass of balloon and its content = 20 g + 1501.17 g

                                                               = 1521.17 g

b) Number of moles of CO₂ in the balloon is 34.15 mol

c) To find the number of CO₂ molecules in the balloon, we need to use Avogadro's number (6.02 x 10²³ molecules/mol).

Number of CO₂ molecules = number of moles of CO₂ x Avogadro's number

                                           = 34.15 mol x 6.02 x 10²³ molecules/mol

                                           = 2.06 x 10²⁵ molecules

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Answer:

Explanation:

Density of a substance can be found by using the formula

\(Density = \frac{mass}{volume} \)

Making mass the subject we have

\(mass = Density \times volume\)

From the question

Density = 2.70 g/cm³

We assume that the aluminum is a cuboid

and volume of a cuboid is given by

Volume = length × width × height

length = 5.3 cm

width = 0.32 cm

height = 2.34 cm

Volume = 5.3 × 0.32 × 2.34 = 3.97 cm³

Substitute the values into the above and solve for the mass

We have

mass = 2.70 × 3.97

We have the final answer as

Hope this helps you