how many moles of zinc are in 4.20 kg of zinc? express your answer to three significant figures and include the appropriate units.

Answer:

what is the question in this case

The number of atoms in one mole of hydrogen is 6.022 × 10²³. 2 moles of water contains 4 moles of hydrogen  thus, 1.2 × 10²⁴. Hence, the statement is false.

Any substance containing 6.022 × 10²³ number of atoms is called one mole of the substance. This number is called Avogadro number. Therefore one mole of every elements contains Avogadro number of atoms.

Thus, one mole of hydrogen gas contains 6.022 × 10²³ H₂.

One  mole of water contains  6.022 × 10²³  water molecules. One water molecule is made of two hydrogens and one oxygens. One mole of water contains 6.022 × 10²³  molecules.

Therefore, two moles of water contains 2 × 6.022 × 10²³ = 1.2 × 10²⁴  H₂ Therefore, the number of hydrogen atoms in one mole of  H₂ gas and two moles of water are not equal.

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Answer:

It has four main components: plasma, red blood cells, white blood cells, and platelets.

Answer:

Two orher components of blood are plasma and platelets.

A molecular formula is a chemical formula for a molecular compound that shows the types and numbers of atoms in the compound's molecule. Ammonia is a nitrogen-hydrogen compound.

The total number of shared electrons in a molecule is 22.

Ionic and covalent compounds are the two types of compounds. Molecules are the most basic unit of a covalent compound, and they can be represented in a variety of ways.

Atoms are the smallest units of matter that retain an element's fundamental chemical properties. However, much of the study of chemistry is concerned with what happens when atoms combine to form compounds. A compound is a unique collection of atoms held together by chemical bonds.

The electrostatic attraction between the positively charged nucleus and the negatively charged electrons surrounding it holds the structure of the atom together, and the stability within chemical bonds is also due to electrostatic attractions. Consider the two most common types of chemical bonds: covalent bonds and ionic bonds. Two atoms share pairs of electrons in covalent bonds, whereas electrons are fully transferred between two atoms in ionic bonds.

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The equilibrium constant (Kc) for the given reaction is approximately 0.077.

Step 1: Write the balanced chemical equation for the reaction:

N2(g) + 3H2(g) ⇌ 2NH3(g)

Step 2: Determine the initial concentrations of N2 and H2:

N2: Initial moles = 0.4811 mol

Initial concentration = 0.4811 mol / 4.50 L = 0.1069 M

H2: Initial moles = 1.721 mol

Initial concentration = 1.721 mol / 4.50 L = 0.3824 M

Step 3: Determine the equilibrium concentrations of N2 and H2:

N2: Equilibrium moles = 0.1601 mol

Equilibrium concentration = 0.1601 mol / 4.50 L = 0.0356 M

H2: Equilibrium moles = (1.721 - 3 * 0.1601) mol = 1.0807 mol

Equilibrium concentration = 1.0807 mol / 4.50 L = 0.2402 M

Step 4: Determine the equilibrium concentration of NH3:

NH3: Equilibrium moles = 2 * 0.1601 mol = 0.3202 mol

Equilibrium concentration = 0.3202 mol / 4.50 L = 0.0712 M

Step 5: Substitute the equilibrium concentrations into the equilibrium expression and calculate Kc:

Kc = ([NH3]^2) / ([N2] * [H2]^3)

= (0.0712^2) / (0.0356 * 0.2402^3)

≈ 0.077

Therefore, the equilibrium constant (Kc) for the given reaction is approximately 0.077.

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Answer:

An outlier on a scatter plot represents something that doesn't fit.

The outlier on this scatter plot is D.(105, 320) might represent a newborn shark

Answer:

N2-

Explanation:

N2- because it has loss the electrons!

Answer:

Neutralization is when the pH (power of hydrogen ions) of a solution is at 7 (considered neutral in the pH scale). This means it's neither acidic nor basic and is neutral. In order to neutralize an acidic solution, you pour in the same amount of a strong base. And in order to neutralize a basic solution, you pour in the same amount of a strong base.

A neutralization reaction will give you salt and water. A common neutralization reaction could be:

HCl (strong acid) + NaOH (strong base) ----> NaCl (Salt) + H2O (water)

Answer:

A customer is travelling to a branch office, and the network administrator provides her with a static IP address for her laptop

Explanation:

I hope this helps!!!...

Brainliest please???

The rate constant for the given first-order reaction at 25°C is approximately 0.102 min⁻¹.

To determine the rate constant of a first-order reaction that is 35.5% complete in 4.90 minutes at 25°C, we need to first calculate the time constant. Since the reaction is first-order, we can use the integrated rate law equation:
ln([A]₀/([A])) = kt
Here, [A]₀ is the initial concentration, [A] is the remaining concentration at time t, and k is the rate constant.
As the reaction is 35.5% complete, 64.5% of the reactant remains (100 - 35.5). So, the ratio [A]₀/([A]) is 1/0.645 = 1.55.
Now, we can rewrite the equation:
ln(1.55) = k(4.90 min)
Solving for k, we have:
k = ln(1.55) / 4.90 min ≈ 0.102 min⁻¹

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The flat areas of basaltic volcanic rock found on the surfaces of planetary bodies like the Moon and Mercury. Comparing the mare on Mercury with the mare on the Moon, we can make the following observations:

1. Different chemical composition: While both the mare on Mercury and the Moon consist of volcanic rocks, they do have distinct chemical compositions. The mare on Mercury contain a higher concentration of sulfur and potassium than those on the Moon.
2. Age: The mare on Mercury are significantly younger than those on the Moon. Mercury's mare are estimated to be around 3.5 billion years old, whereas the mare on the Moon are believed to be between 3.1 to 3.8 billion years old.
3. Albedo: The mare on Mercury are brighter (have a higher albedo) than those on the Moon. This higher albedo can be attributed to Mercury's surface composition, which is influenced by the presence of more metallic elements, causing the surface to be more reflective.

In summary, the mare on Mercury differ from those on the Moon in terms of their chemical composition, age, and brightness (albedo).

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According to the balanced equation, 31.7 grams of nitrogen gas (N₂) reacting with excess hydrogen gas (H₂) will produce a 2.264 moles of ammonia gas (NH₃).

To determine the moles of ammonia formed, we need to convert the given mass of nitrogen gas to moles using its molar mass and the stoichiometric ratio of the balanced equation.

The molar mass of nitrogen gas (N₂) is 28.02 g/mol. To calculate the number of moles of nitrogen gas, we divide the given mass by its molar mass:

31.7 g / 28.02 g/mol = 1.132 mol

According to the stoichiometry of the balanced equation, the ratio between nitrogen gas and ammonia gas is 1:2. This means that for every 1 mole of nitrogen gas, 2 moles of ammonia gas are produced.

Therefore, using the stoichiometric ratio, we can determine the moles of ammonia formed:

1.132 mol N₂ * (2 mol NH₃ / 1 mol N₂) = 2.264 mol NH₃

Thus, upon the complete reaction of 31.7 grams of nitrogen gas with excess hydrogen gas, 2.264 moles of ammonia gas will be formed.

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Answer:

Explanation:

To show the reactants and products, write the imbalanced equation.

Calculate the number of atoms of each element on each side of the reaction arrow.

To make the number of atoms of each element the same on both sides of the equation, multiply coefficients (the numbers in front of the formulas). ...

Check your work by indicating the state of matter of the reactants and products.

(B)

Fusion reaction involves light nuclei and of all the elements listed, only the hydrogen isotopes can be considered light.

The bond order of B₂ is  1.

Bond order is the number of bonding pairs of electrons between two atoms. In a covalent bond among atoms, an unmarried bond has a bond order of one, a double bond has a bond order of two, a triple bond has a bond order of three, and so on.

Calculation:-

for b₂ = σ1s² σ1s*²  σ2s² σ1s*² π²Pₓ¹ =  π²Py¹

bond order = (Nb - Na)/2

                   = 6 - 4 /2

                   =  1.

Bond order, as delivered through Linus Pauling, is described because of the difference between the number of bonds and anti-bonds. The bond order itself is the number of electron pairs between two atoms. For instance, in diatomic nitrogen N≡N, the bond order among the 2 nitrogen atoms is three.

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Answer:

The solute is the substance being dissolved.

The solvent is the substance dissolving the solute.

Therefore, the salt is the solute and the water is the solvent.

Explanation:

The salt is the solute.

Answer:

a.)cations; free to move around

b.)cations; fixed in place

In the context of atomic orbital (AO) wavefunctions, the terms "radial node" and "nodal plane" refer to different aspects of the wavefunction's behavior.

A radial node is a region in the AO wavefunction where the probability of finding an electron is zero along the radial direction. In other words, it represents a spherical shell where the electron is unlikely to be found. The number of radial nodes is determined by the principal quantum number (n) of the orbital. For example, the 2s orbital has one radial node, while the 2p orbital has no radial nodes.

On the other hand, a nodal plane is a flat plane within the AO wavefunction where the probability of finding an electron is zero along a particular direction. It represents a surface that divides the orbital into two regions of opposite phases. The number of nodal planes is determined by the angular quantum numbers (l and m) of the orbital. For example, the 2s orbital has no nodal planes, while the 2p orbital has one nodal plane (the xz or yz plane).

Radial nodes arise from the radial part of the wavefunction because they depend on the distance from the nucleus. The radial part determines the distribution of the electron density as a function of distance, and the nodes correspond to regions where the density drops to zero.

On the other hand, nodal planes arise from the angular part of the wavefunction because they depend on the orientation and shape of the orbital. The angular part describes the angular distribution of the electron density around the nucleus, and the nodal planes correspond to regions where the phase of the wavefunction changes sign.

In summary, radial nodes are related to the distance from the nucleus and arise from the radial part of the wavefunction, while nodal planes are related to the orientation and shape of the orbital and arise from the angular part of the wavefunction. The 2s orbital has one radial node and no nodal planes, while the 2p orbital has no radial nodes and one nodal plane.

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Answer:

Explanation:

The new pressure can be found by using the formula for Boyle's law which is

\(P_1V_1 = P_2V_2\)

Since we're finding the new pressure

\(P_2 = \frac{P_1V_1}{V_2} \\\)

We have

\(P_2 = \frac{0.5 \times 150}{75} = \frac{75}{75} = 1 \\ \)

We have the final answer as

Hope this helps you

Answer:

B

Explanation:

chemical reaction a process in which one or more substance the recessed ants are converted to one or more different substances the products substances are either chemical elements or compounds a chemical reaction rearranges the consulstituent atoms of reactants to create different substances products

Answer:

Explanation:

You have to assume that there is 1 mol of CH4(g).

If that is so, then the products = 1 + 2 = 3 mols of CO2 and H20

So the answer is the 3rd one down or C

Answer:

3 moles of products

Explanation:

The numeral in front of each product is the coefficient. It indicates the number of moles of that product you have. This reaction shows 1 mole of methane reacting with 2 moles of O₂ to produce 1 mole of carbon dioxide plus 2 moles of water. 3 total moles of products.

Answer:

100.12*C

Explanation:

Our solute is glycerin and the solvent is water.

1) Convert grams of the solute to moles:

n (moles)=Mass/Molar Mass => 1/92.1=0.01086 moles

2) Find molality from moles of solute and mass of solvent in Kg:

m (molality)=moles of solute/Kg solvent => 0.01086/0.0478=0.2272m

3) Finding the change boiling point (Bp) using molality times the Bp constant (the Bp constant of water is 0.512*C/m): 0.2272*0.512=0.116*C

4) Under 1 atm, the boiling point of water is exactly 100 and to find the new Bp, simply add the change Bp completed in step 3 with the boiling point of water: 100+0.116=100.116*C or 100.12*C

Hope this helps!

Answer:

Explanation:

Titration: titrate twice, the first time with an indicator to determine how much sodium hydroxide is needed to completely react with hydrochloric acid, and the second time without an indicator to prevent the contamination of the sodium chloride salt produced

The answer to the question is D. Appearance was of primary importance because of which Mortise-and-tenon joints were used in most 18th century timber framing

Mortise-and-tenon joints were commonly used in 18th century timber framing because they provided a strong and durable joint, but they also allowed for a clean and aesthetically pleasing appearance. While metal fasteners were scarce at the time, it was not the only reason for the use of this joint. The use of mortise-and-tenon joints was also a reflection of the craftsmanship and skill of the builders who wanted to create a lasting and visually appealing structure. Additionally, the tools needed to make mortise-and-tenon joints were readily available and could easily be produced with the primitive tools of the time.

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Answer:

The new substance will need more energy to form its chemical bonds than the old substance will release. ... More energy will be released from the old substance than the new substance will need to form its chemical bonds.

Explanation:

This is the answer I got. Hope it's really helpful

Answer:

"Which is evidence that a chemical reaction has likely occurred?"

The correct answer would be,

B. the formation of a precipitate

Explanation:

Got it right on my test, have a great day!

Answer:

2578.608 centimeters in 28.2 yards.

Explanation:

There are 91.44 centimeters to a yard. Multiplying 91.44 by the number of yards, we get the number of centimeters per yards.

91.44(28.2) = 2578.608

Answer:

hruejhehee7 suhdbdudud d d

Explanation:

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ANSWER

The volume is 2666.38L

EXPLANATION

Given information

The concentration (Molarity ) of H2SO4 is 2.50 M

The mass of NaOH is 75.0g

To find the milliliters of 2.50M of H2SO4, follow the steps below

Step 1: Write a balanced equation for the reaction

From the above-balanced reaction, you will see that 1 mole of the acid reacts with 2 moles of the base to give 1 mole of the salt and 1 mole of water

Step 2: Find the mole of sodium hydroxide using the below formula

Recall that, the molar mass of NaOH is 39.997 g/mol

From the calculations, you will see that the mole of NaOH is 1.875 moles

Step 3: Calculate the mole of sulfuric acid using a stoichiometry ratiO

1 mole of H2SO4 is equivalent to 2 moles of NaOH

Let x represent the number of moles of H2SO4

Mathematically,

Hence, the mole of H2SO4 is 0.9376 moles

Step 4: Find the volume of the solution using the below formula

Where,

n = is the number of moles

C = concentration in molarity

V = Volume of the solution in Liters

Answer:

14...................