what mass in grams of sodium bicarbonate nahco3 is required to neutralize of 1000.0l of .350 m h2s04?

Answer:

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Answer:

3 electrons

Explanation:

Nitrate needs 3 electrons to achieve a stable electron configuration

Three is the answer. it needs three to complete its shell

Answer:

If nitrogen = 30.4% then oxygen = 100-30.4 = 69.6%

divide each % value by atomic mass

N = 30.4/14 = 2.17

O = 69.6/16 = 4.35

Divide each y smaller:

N = 2.17/2.17 = 1

O = 4.35/2.17 = 2

Explanation:

"The empirical Formula will be \(NO_{2}\)."

What is empirical formula?

In chemistry, an empirical formula is the simplest thought of the entire number quantity of atoms in a molecule.

It is given that N = 30.4%.

The % of O can be determined as: 100-30.4%= 69.65.

Now, after dividing % value with atomic mass, we get.

Mass of  N= 14 and Mass of O = 16.

N= 30.4/14= 2.17

O = 69.6/ 16= 4.35

It can be seen that N has less number as compared to O . So, divide each with 2.17.

N= 2.17/2.17 = 1

O = 4.35/2.17=2

So the empirical formula will be \(NO_{2}\).

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first, we need the molar mass of HNO3(azotic acid) it's equal to 1AH+1AN+3AO(where A is the atomic mass of the element present within the molecule and, it's multiplied by how many times it's present)=1*1+1*14+3*16=15+54=69g/mole

now we multiply the molar mass with the number of moles 69*1.2=82.8 grames

Answer:

1. 1 , 12, 8

2.2,6, 2, 3

3. 2, 3 ,2

4. 2, 1 , 2

we're currently learning this in my chemistry class so I'm pretty familiar with these equations, so i hope these help

Answer:

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Hope it will help you

Answer: it's required for all chemical reactions in a cell.

Explanation: took the test. please vote :-)

The aqueous environment is vital for cellular functions, facilitating chemical reactions, maintaining structure, and enabling cellular processes.

Option (D) is correct

The aqueous environment within a cell, primarily composed of water and various dissolved molecules, plays a crucial role in cellular processes. It enables and supports a multitude of chemical reactions necessary for cellular metabolism, growth, and maintenance.

Water's solvent properties allow biochemical reactions to take place, aiding in nutrient transport, waste removal, and cell signaling. Moreover, water's cohesive and adhesive forces contribute to maintaining cellular structure and preventing organelles from sticking together, ensuring proper compartmentalization and functioning.

While it does not provide energy directly, the aqueous environment indirectly sustains cellular energy processes by facilitating reactions within the cell. Additionally, the fluidity of the aqueous environment enables cells to change shape, promoting functions such as migration, phagocytosis, and division.

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The complete question is:

Why is the aqueous environment of a cell important?

A) It prevents organelles in a cell from sticking together.

B) It allows cells to bend and change shape as needed.

C) It provides a constant energy source for a cell. I

D) t's required for all chemical reactions in a cell.

The Claim, Evidence, Reasoning (CER) model is a framework used in academic writing to develop an argument based on evidence.

The three words in the acronym stand for Claim, Evidence, and Reasoning, and each plays a crucial role in creating a persuasive argument.

Firstly, the Claim refers to the main point or answer that the writer is trying to make. It is the central idea that the evidence and reasoning will support. The claim should be specific, clear, and concise to avoid confusion or ambiguity.

Secondly, Evidence is the support for the claim and is drawn from a variety of sources, including scientific data, expert opinions, and personal experiences. The evidence should be credible, relevant, and sufficient to back up the claim.

Lastly, Reasoning connects the evidence to the claim and explains why the evidence supports the claim. It involves analysis, interpretation, and synthesis of the evidence to show how it fits together and supports the claim.

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Full question is:

According to the Claim, Evidence, Reasoning (CER) model, "CER" stands for 3 words: Claim (The answer), Evidence (Why the answer is right) and Reasoning (Connect answer to evidence). Explain this  model in 150 words.

The color of Statue of Liberty was initially the shade of copper but it has under went oxidation which changed it's color to green indicating  that a chemical change took place in it.

Chemical changes are defined as changes which occur when a substance combines with another substance to form a new substance.Alternatively, when a substance breaks down or decomposes to give new substances it is also considered to be a chemical change.

There are several characteristics of chemical changes like change in color, change in state , change in odor and change in composition . During chemical change there is also formation of precipitate an insoluble mass of substance or even evolution of gases.

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Answer: a) \(H_3PO_4+3NaOH\rightarrow Na_3PO_4+3H_2O\)

b) \(PCl_3+3H_2O\rightarrow P(OH)_3+3HCl\)

c) \(2Al+3H_2SO_4\rightarrow Al_2(SO_4)_3+3H_2\)

Explanation:

According to the law of conservation of mass, mass can neither be created nor be destroyed. Thus the mass of products has to be equal to the mass of reactants. The number of atoms of each element has to be same on reactant and product side.

The balanced chemical equations are :

\(H_3PO_4+3NaOH\rightarrow Na_3PO_4+3H_2O\)

\(PCl_3+3H_2O\rightarrow P(OH)_3+3HCl\)

\(2Al+3H_2SO_4\rightarrow Al_2(SO_4)_3+3H_2\)

New crust is found at the center of the mid-ocean ridge, proving the movement of the seafloor and the surface of the Earth and is denoted as option D.

These are structures which are formed where two tectonic plates are spreading apart and therefore forms the seafloor which is present in larger types of water bodies such as sea, oceans etc.

There is also the presence of new crust at the center and it helps to prove movement of the surface of the earth which is therefore the reason why it was chosen as the correct choice.

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The sample of lead (Pb) contains approximately 2.86 x 10^(-4) moles of lead atoms.

To calculate the number of moles in a sample of lead (Pb) containing a certain number of lead atoms, we need to divide the given number of atoms by Avogadro's number.

Avogadro's number, denoted as NA, is approximately 6.022 x 10^23 atoms/mol.

Given that the sample contains 1.72 x 10^20 lead atoms, we can calculate the number of moles as follows:

Number of moles = Number of atoms / Avogadro's number

Number of moles = 1.72 x 10^20 / (6.022 x 10^23)

Number of moles ≈ 2.86 x 10^(-4) moles

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When refrigerant is in a high-pressure, high-temperature state, it enters the metering device. The refrigerant is then changed to a low-pressure, low-temperature state as a result of the metering device. As a result, the refrigerant will expand and the heat will be absorbed as the temperature decreases.

The metering device is a component in a refrigeration or air conditioning system that ensures that the correct amount of refrigerant is delivered to the evaporator. The device functions as a flow control, reducing the refrigerant's pressure before it reaches the evaporator. The metering device may be a simple capillary tube, an orifice, an automatic expansion valve (AEV), or a thermostatic expansion valve (TXV). The capillary tube is the simplest and least expensive metering device. It's just a small copper tube that's thin and long. The AEV is a constant pressure valve that maintains a consistent pressure drop across it, allowing it to regulate the refrigerant flow. A thermostatic expansion valve is the most sophisticated metering device, as it can sense the temperature at the evaporator outlet and adjust the refrigerant flow accordingly.

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Approximately 18.4832 mL of 0.250 M NaOH is required to neutralize 30.4 mL of 0.152 M HCl.

To determine the volume of 0.250 M NaOH required to neutralize 30.4 mL of 0.152 M HCl, we can use the concept of stoichiometry and the balanced chemical equation for the neutralization reaction between NaOH and HCl:

NaOH + HCl -> NaCl + H2O

From the balanced equation, we can see that the stoichiometric ratio between NaOH and HCl is 1:1. This means that for every mole of NaOH, we require an equal number of moles of HCl to neutralize.

First, let's calculate the number of moles of HCl present in the given volume:

Moles of HCl = concentration of HCl * volume of HCl

= 0.152 M * 30.4 mL

= 4.6208 mmol (millimoles)

Since the stoichiometric ratio is 1:1, the number of moles of NaOH required to neutralize the HCl is also 4.6208 mmol.

Now, let's calculate the volume of 0.250 M NaOH needed to contain 4.6208 mmol:

Volume of NaOH = (moles of NaOH) / (concentration of NaOH)

= 4.6208 mmol / 0.250 M

= 18.4832 mL

Therefore, approximately 18.4832 mL of 0.250 M NaOH is required to neutralize 30.4 mL of 0.152 M HCl.

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Answer:

What are the choices? :)

Explanation:

Answer:

Fluorine

Explanation:

Fluorine is the most electronegative element.

let me know if this is wrong :)

The correct answer is (e) Increases metabolism of carbohydrates. Parathyroid hormone (PTH) is a hormone secreted by the parathyroid glands that regulates calcium and phosphorus levels in the body.

PTH stimulates the process of bone resorption, releasing calcium and phosphorus from bones into the blood. It also increases the reabsorption of calcium by renal tubules, preventing it from being excreted in urine.

PTH also has an indirect effect of increasing blood calcium levels by promoting the conversion of vitamin D into its active form, which increases intestinal absorption of calcium.

The hormone does not have any direct effect on metabolism of carbohydrates. Therefore, option (e) is not an effect of parathyroid hormone.

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The volume of water added to dissolve potassium hydrogen phthalate (KHP) does not matter because the mass of KHP used is known and it will dissolve completely in any volume of water.

In volumetric analysis, the primary objective is to find the exact concentration of an analyte in a given solution. Analyte refers to the substance whose concentration is to be determined.In order to measure the analyte concentration, the known volume of the titrant of known concentration is added to the analyte until the endpoint is reached.Endpoint refers to the point in a titration where the reaction between the analyte and titrant is complete. The endpoint can be detected by observing a physical change in the system.In the case of KHP, it dissolves completely in any volume of water.

Therefore, the mass of KHP used can be accurately measured and dissolved in any volume of water. As a result, the volume of water added to dissolve the KHP does not affect the accuracy of the experiment.In summary, the volume of water added to dissolve KHP does not matter because the mass of KHP used is known and it will dissolve completely in any volume of water.

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Answer:

The water cycle is a series a of reversible changes. The sea water under the action of heat get vaporised which in turn changes into clouds. These clouds provide rain. The rain water then flows to the streams and rivers which eventually falls back to the oceans and seas.

The estimated enthalpy change for the reaction CO(g) + Cl2(g) → COCl2(g) is approximately -296 kJ/mol. The negative sign indicates that the reaction is exothermic, meaning it releases heat to the surroundings.

To estimate the enthalpy change for the reaction CO(g) + Cl2(g) → COCl2(g) using bond energies, we need to consider the bonds broken and the bonds formed in the reaction. We will use the bond energies provided in the table.

In the reactants:

- Two C=O bonds in CO: 2 × 732 kJ/mol = 1464 kJ/mol

- One Cl-Cl bond in Cl2: 1 × 242 kJ/mol = 242 kJ/mol

In the product:

- One C=O bond in COCl2: 1 × 732 kJ/mol = 732 kJ/mol

- Two C-Cl bonds in COCl2: 2 × 339 kJ/mol = 678 kJ/mol

Now, let's calculate the overall enthalpy change:

ΔH = (Total energy of bonds broken) - (Total energy of bonds formed)

ΔH = (1464 kJ/mol) + (242 kJ/mol) - (732 kJ/mol) - (678 kJ/mol)

ΔH = 296 kJ/mol

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"The length of the edge of the unit cell is approximately 246.3 pm." The packing efficiency of a unit cell refers to the amount of space occupied by atoms or ions within the cell. It is a measure of how efficiently the atoms or ions are packed together in a crystal lattice.

In a body-centered cubic (BCC) unit cell, there are atoms at each of the eight corners and one additional atom at the center of the cube. Let's denote the edge length of the unit cell as "a."

The body diagonal of the BCC unit cell can be calculated using the Pythagorean theorem. It is equal to four times the radius of the atom (since it passes through the center of the cube), which is 4 * 106.6 pm = 426.4 pm.

The body diagonal (d) of a cube can be related to the edge length (a) using the formula:

d = sqrt(3) * a

Substituting the known value for d, we have:

426.4 pm = sqrt(3) * a

To find the value of a, we can solve this equation for a:

a = 426.4 pm / sqrt(3)

Using a calculator, we find:

a ≈ 246.3 pm

Therefore, the length of the edge of the unit cell is approximately 246.3 pm.

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The coefficient of Fe would be 2, the coefficient of Cl2 would be 3, while the coefficient of FeCl2 would be 2.  

The balanced equation of the reaction would be as follows:

\(2Fe(S) + 3Cl_2 ---> 2FeCl_3(S)\)

Thus, the coefficients of Fe, Cl2, and FeCl3 respectively would be 2, 3, and 2.

In other words, 2 moles of Fe require 3 moles of Cl2 to produce 2 moles of FeCl3 in a complete reaction.

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Answer:

+1

Explanation:

your removing a electron and it was already balanced

Answer:

One mole of copper atoms has Avogadro number of copper atoms i.e. 6.022×10

23

 atoms.

Given the mass of Copper is 6.4g

Number of Copper atoms in 6.4g =

molar mass

given mass

​

×Avogadro number

                                                       =

63.55

6.4

​

×6.022×10

23

 copper atoms

                                                       =6.064×10

22

 copper atoms

Explanation:

Answer: C

Explanation:

The N2 should have a triple bond because it needs three covalent bonds to fill its outer shell. This means the two atoms need to share three electrons each.

It also serves as a nice illustration of a triple-bonded molecule. For the Lewis structure of N2, there are ten accessible valence electrons. Therefore, option C is correct.

The diagrams known as Lewis structures, often referred to as Lewis dot formulas, Lewis dot structures, electron dot structures, or Lewis electron dot structures, depict the interactions between the atoms in a molecule as well as any lone pairs of electrons that may be present.

It contradicts the octet rule, as shown by the production of molecules, and could not account for the release of energy during the formation of covalent bonds.

The three parallel lines between the N atoms represent three bonds. This is a triple bond, with one electron from each N atom contributing to each bond. A total of 6 electrons are thus represented by this triple bond.

Thus, option C is correct.

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Yes, I am agree with the evaporating dish is not preheated, then the mass of the anhydrate will be heavier, resulting in a greater value for the anhydrate and a smaller value for "z" in this formula:

CuxCly • zH2O

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Answer:

The charge an element would have if it lost or gained electrons