The total pressure of gas collected over water is 725.0 mmHg and the temperature is 18.5 C what is the pressure of hydrogen gas formed in mmHg

Explanation:

Since 10mm is 1cm

Therefore 7.60cm is 760mm

Since 1 inch is 2.54cm

Therefore 7.60cm is 3.10 inches

The student's method for preparing pure crystals of copper sulfate contains errors and does not produce the desired outcome.

Use copper oxide instead of calcium carbonate: The student should add copper oxide (CuO) to the hydrochloric acid instead of calcium carbonate. Copper oxide reacts with hydrochloric acid to form copper chloride, which can then be converted to copper sulfate through a subsequent reaction with sulfuric acid.

Add sulfuric acid to the copper chloride solution: After the copper chloride solution is formed, the student should add sulfuric acid to it. This reaction between copper chloride and sulfuric acid will yield copper sulfate and hydrochloric acid. The student should ensure that the correct stoichiometric ratio is maintained to maximize the yield of copper sulfate crystals.

Crystal formation: The student should allow the solution to cool slowly after the reaction with sulfuric acid. This promotes the formation of larger, well-defined copper sulfate crystals.

Filtration and drying: Once the crystals have formed, the student should filter the solution to separate the solid crystals from the remaining liquid. The filtered crystals should then be thoroughly dried to remove any remaining water, resulting in pure copper sulfate crystals.

By following these improvements, the student can obtain pure crystals of copper sulfate.

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10. grams of hydrogen gas is equal to 5 moles of hydrogen gas. In order to react with this amount of hydrogen gas, 5 moles of oxygen gas is required, which is equal to 160 grams of oxygen gas.

Hydrogen gas is a colorless, odorless, tasteless, and flammable gas. It is the lightest and most abundant element in the universe, making up around 75% of the universe's elemental mass. Hydrogen can exist in several states, including molecular hydrogen (H2), atomic hydrogen (H), and ionized hydrogen (H+). In its molecular form, hydrogen is a non-toxic and non-polluting gas that can be used to produce electricity, fuel, and other chemicals.

In order to answer this question, you must first understand the stoichiometry of the reaction between hydrogen and oxygen.

The balanced equation for this reaction is:

2H2 + O2 → 2H2O

This means that for every two moles of hydrogen gas, one mole of oxygen gas is required. The molar mass of hydrogen gas is 2.016 g/mol, and the molar mass of oxygen gas is 32.00 g/mol.

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Answer:

Mitochondria

Explanation:

Answer:

Mitochondria

Explanation:

Mitochondria are tiny organelles inside cells that are involved in releasing energy from food. This process is known as cellular respiration. It is for this reason that mitochondria are often referred to as the powerhouses of the cell.

According to the information provided, there are 8.601024 8.60 10 -24 ammonia molecules in a solution of water and ammonia (NH3 N H 3). The total number of hydrogen atoms inside the solution is 1.06 1026.

Water has the chemical formula H2O, which stands for two moles of hydrogen and one mole for oxygen. Consequently, there are two moles of hydrogen in a single water molecule. 18 g if water will have 1 x 12.046 1023 = 12.046 1023 hydrogen atoms.

According to Avogadro's number, there's many 6.022 x 1023 water molecules in a mole of water. After determining that a drop of water has 0.002775 moles, we can now calculate how so many molecules are present in it: molecules inside a water drop Equal (6.022 x 1023 particles) x 0.002275 moles.

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The mass of the asteroid is C. 1.2 x \(10^{12}\) Kg

To find the mass of the other asteroid, we can rearrange the equation for the gravitational force between two objects:

F = (G * m1 * m2) / \(r^{2}\)

where F is the force of gravity, G is the gravitational constant, m1 and m2 are the masses of the two asteroids, and r is the distance between them.

Given that the distance between the asteroids is 75000 m, the force of gravity between them is 1.14 N, and one asteroid has a mass of 8 x \(10^{7}\) kg, we can substitute these values into the equation and solve for the mass of the other asteroid (m2):

1.14 N = (6.67430 × \(10^{-11}\) N \(m^{2}\)/\(Kg^{2}\) * 8 x \(10^{7}\) kg * \(m2\)) / \((75000 m)^{2}\)

Simplifying and solving the equation, we find that the mass of the other asteroid (m2) is approximately 1.2 x \(10^{12}\) kg. Therefore, Option C is correct.

The question was incomplete. find the full content below:

Two asteroids are 75000 m apart one has a mass of 8 x \(10^{7}\) kg if the force of gravity between them is 1.14 what is the mass of the asteroid

A. 3.4 x \(10^{11}\) kg

B. 8.3 x \(10^{12}\) kg

C. 1.2 x \(10^{12}\) kg

D. 1.2 x \(10^{10}\) kg

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Winter is purple, spring is blue, summer is orange, fall is green.

we would need 2625.13 grams (or 2.62513 kilograms) of NaCl.

To calculate the mass of NaCl required to produce a 26.4 mol/L solution with a 1.7 L volume, we need to use the formula that relates the mass of solute, moles of solute, and molarity:Molarity (M) = moles of solute / liters of solution Rearranging this formula, we get:moles of solute = Molarity (M) x liters of solutionWe can use this formula to find the moles of NaCl needed:moles of NaCl = 26.4 mol/L x 1.7 L = 44.88 molNow, we can use the molar mass of NaCl to convert from moles to grams. The molar mass of NaCl is 58.44 g/mol:mass of NaCl = moles of NaCl x molar mass of NaClmass of NaCl = 44.88 mol x 58.44 g/mol = 2625.13 gTo produce a 26.4 mol/L solution with a 1.7 L volume.

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Answer:

Calculate the frequency of light having wavelength of 456 nm.

1.22*10^8nm

Explanation:

In the given question, \(6.58 \times 10^{14}\) Hz is the frequency of the light with a wavelength of 456 nm.

Frequency is a measure of the number of cycles of a periodic wave that occur per unit of time.

The frequency of light can be calculated using the following equation:

frequency = speed of light / wavelength

where the speed of light is a constant equal to \(\rm 3 \times 10^8 \ m/s\).

To use this equation, we need to convert the wavelength from nanometers to meters:

456 nm = \(\rm 456 \times 10^{-9}\ m\)

Now, we can substitute the values into the equation:

frequency =  \(\rm 3 \times 10^8 \ m/s\) / \(\rm 456 \times 10^{-9}\ m\)

=  \(6.58 \times 10^{14}\) Hz

Therefore, the frequency of light with a wavelength of 456 nm is  \(6.58 \times 10^{14}\) Hz.

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Answer:

41.17g

Explanation:

We are given the following parameters for Flourine gas(F2).

Volume = 5.00L

Pressure = 4.00× 10³mmHG

Temperature =23°c

The formula we would be applying is Ideal gas law

PV = nRT

Step 1

We find the number of moles of Flourine gas present.

T = 23°C

Converting to Kelvin

= °C + 273k

= 23°C + 273k

= 296k

V = Volume = 5.00L

R = 0.08206L.atm/mol.K

P = Pressure (in atm)

In the question, the pressure is given as 4.00 × 10³mmHg

Converting to atm(atmosphere)

1 mmHg = 0.00131579atm

4.00 × 10³ =

Cross Multiply

4.00 × 10³ × 0.00131579atm

= 5.263159 atm

The formula for number of moles =

n = PV/RT

n = 5.263159 atm × 5.00L/0.08206L.atm/mol.K × 296K

n = 1.0834112811moles

Step 2

We calculate the mass of Flourine gas

The molar mass of Flourine gas =

F2 = 19 × 2

= 38 g/mol

Mass of Flourine gas = Molar mass of Flourine gas × No of moles

Mass = 38g/mol × 1.0834112811moles

41.169628682grams

Approximately = 41.17 grams.

The mass of F₂ in the 5 L cylinder at 4×10³ mmHg and 23 °C is 41.154 g

Volume (V) = 5 L

Pressure (P) = 4×10³ mmHg

Temperature (T) = 23 °C = 23 + 273 = 296 K

Gas constant (R) = 62.364 mmHg.L/Kmol

PV = nRT

4×10³ × 5 = n × 62.364 × 296

20000 = n × 18459.744

Divide both side by 18459.744

n = 20000 / 18459.744

Mole of F₂ = 1.083 mole

Molar mass of F₂ = 2 × 19 = 38 g/mol

Mass = mole × molar mass

Mass of F₂ = 1.083 × 48

Therefore, the mass of F₂ in the cylinder is 41.154 g

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Answer: 177.23 g.

Explanation:

the volume of the aluminum bar is

1.7 cm x 3.0 cm x 12.9 cm

= 65.61 cm^3

2.7 g/cm^3 x 65.61 cm^3

177.23g

Answer:

a) The balanced chemical equation for the reaction is:

3C (s) + 4H2 (g) → CH4 (g)

In this reaction, 3 carbon atoms combine with 4 molecules of hydrogen to produce one molecule of methane. The representative particles in this reaction are atoms of carbon and molecules of hydrogen and methane.

b) The balanced chemical equation for the reaction is:

2N2 (g) + 7H2 (g) → 2NH3 (g)

In this reaction, 7 molecules of hydrogen react with 2 molecules of nitrogen gas to produce 2 molecules of ammonia. The representative particles in this reaction are molecules of hydrogen, nitrogen, and ammonia.

c) The balanced chemical equation for the reaction is:

H2 (g) + Cl2 (g) → 2HCl (g)

In this reaction, 4 molecules of hydrogen react with 5 molecules of chlorine gas to produce 10 molecules of hydrogen chloride. The representative particles in this reaction are molecules of hydrogen, chlorine, and hydrogen chloride.

To determine the limiting and excess reagents and the amount of unreacted excess reactant, we need to know the initial amounts of each reactant. Without this information, we cannot determine the limiting and excess reagents or the amount of unreacted excess reactant.

Answer:

Explanation:

If a zero is found between significant digits, it is significant

Answer:

D: Warm Temps/ Moist Air

Explanation:

Tropical places usulay have warm mosit air

Maritime Tropical air is associated with warm temperatures and moist air.

Maritime Tropical (mT) air is a type of air mass that forms over warm tropical or subtropical ocean regions. It acquires its characteristics from the ocean's influence, particularly its warm temperatures and high moisture content.

Warm Temperatures: Maritime Tropical air masses originate from regions near the equator or subtropics, where solar radiation is intense and consistently high. As a result, these air masses are typically warm, with temperatures ranging from mild to hot.

The term "Maritime" refers to air masses that have originated from over the ocean, which generally have higher moisture content due to evaporation from the ocean surface. The term "Tropical" indicates that the air mass originates from or near tropical regions, where warm temperatures are prevalent.

Therefore, the correct answer is: Warm Temps/ Moist Air.

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Answer: The answer is Iceberg

Answer:

Is it an iceberg?

Explanation:

it floats in water

and you can only see the tip of an iceberg

Hope this helps! :)

Have a great weekend!!

Answer:

Hydrogen bonding - London dispersion forces - dipole-dipole interactions

Strongest ----> Weakest

Answer:

Condensation reaction/ direct synthesis reaction

Explanation:

Combines simple molecules to form complex molecules producing water

Answer:

13.6272 Grams

Explanation:

Moles of Calcium × atomic weight = Grams

0.34 × 40.08 = 13.6272

0.34 Moles of Calcium = 13.6272 Grams

Explanation:

this equation is balanced

if you look at it carefully

k=1

f=1

o=2

we do not have any opposing element

Answer:

this equation is balanced

if you look at it carefully

k=1

f=1

o=2

we do not have any opposing element

Answer:

15 kgm/s of momentum

Explanation:

Answer:

forty point five one eight four

Explanation:

40.5184

Sig Figs

6

40.5184

Decimals

4

40.5184

Scientific Notation

4.05184 × 101

E-Notation

4.05184e+1

Words

forty point five one eight four

Answer:

That is sodium

Explanation:

Sodium is found there

The ions that are formed by the ions is;

The term ion refers to a specie that is obtained by the loss or gain of electrons. A positive ion is formed by the loss of electrons while a negative ion is formed by gain of electrons.

A positive ions has more protons than electrons while a negative ion has more electrons than protons. There is only one major ion that could be formed by main group elements.

The ions that are formed by the ions is;

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Answer:

The molarity of the solution is 1.23M.

Explanation:

1st) To calculate the molarity, it is necessary to have the moles of the solute per liter (or 1000mL) of solution. So, we have to convert 1.20g of HCl to moles, using the molar mass of HCl (36.5g/mol):

2nd) Now we know that 0.032 moles of HCl are contained in 25.0mL of water.

HCl is the solute and water is the solvent, so with the density of HCl (1.3g/mL) we have to calculate the mL of HCl:

Now, adding the solute plus the solvent, we get the volume of the solution:

3rd) Finally, we can calculate the molarity of the solution with a mathematical rule of three:

So, the molarity of the solution is 1.23M.

To create molecules, atoms combine. Two hydrogen (H) atoms and one oxygen (O) atom make up a water molecule's three atoms. H2O is a common abbreviation for water because of this.

The smallest unit of a material that keeps its content and characteristics is a molecule, which is made up of two or more atoms linked together by chemical bonds. The building blocks of chemistry are molecules.

The phrase "the molecules of life" frequently refers to these four categories of molecules. Proteins, carbohydrates, lipids, and nucleic acids make up the four basic building blocks of life. Every single life on Earth depends on one or more of the four categories. These four molecules are necessary for a cell and an organism to exist.

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Several factors can dictate entropy in an equation.

These include:

1. Phase changes

⇒ When a solid turns to a liquid, the entropy increases as the particles have more freedom to move around and thus have a greater ability for 'disorder'. Same goes for a liquid turning to a gas. In a gas, the intermolecular forces are much weaker than that of a solid or liquid, allowing the particles more freedom.

So, going from a solid to liquid to gas increases entropy, and going the other way, from gas to liquid to solid, decreases entropy.

Example:

H₂O(l) -> H₂O(g)

This will have a positive entropy change, as the water molecules are becoming gaseous and thus have more freedom.

2. Dissolution

⇒ Similarly, breaking up particles of a solute when dissolving in a solvent will increase entropy as the particles are no longer bound together.

So, dissolving a solute will increase entropy.

Example:

NaCl(s) -> NaCl(aq)

This will have a positive entropy change, as the NaCl particles are more free after being separated.

3. Number of products and reactants

⇒ Generally, if you have more moles of products than reactants, if they are the same phase then entropy will increase. Note this is not necessarily true if you form a gas from two non-gas reactants, as the gas will still have more entropy.

4. Temperature

⇒ Increasing temperature will increase entropy as the particles have more kinetic energy and are then moving faster.

-------------------------------------------

l. 2N2(g) + O2(g) → 2N2O(g)

3 moles of gas are forming 2 moles of gas. The phase of products and reactants are the same, so since we have less moles of product than reactant, entropy will be negative.

II. CaCO3(s) → CaO(s) + CO2(g)

1 mole of solid is forming 1 mole of solid and 1 mole of gas. There is a phase change from solid to gas, and there are more moles of product than reactant, entropy will be positive.

III. Zn(s) + 2HCl(aq) → ZnCl2(aq) + H2(g)​

While 3 moles of reactant are forming only 2 moles product, we are forming a gas from non-gaseous reactants, so entropy will be positive regardless.