In SF6, which intermolecular force(s) is/are present? Dispersion, dipole-dipole and hydrogen bonding forces are present. Only dispersion forces are present. Only dispersion and dipole-dipole forces are present. Only hydrogen bonding forces are present. Only dipole-dipole and hydrogen bonding forces are present.

Metallic elements exist in a solid-state and they are opaque, have a shiny surface, good conductors of electricity and heat, malleable and ductile, and are dense. The structure of metals is formed by atoms that are held together by metallic bonds. These atoms have loosely bound valence electrons that can be shared between the neighboring atoms.

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Answer: 0.9704 moles of \(O_2\) will react when 0.6469 moles of water are formed.

Explanation:

The balanced chemical reaction is:

\(2H_2S+3O_2(g)\rightarrow 2SO_2+2H_2O\)  

According to stoichiometry :

2 moles of \(H_2O\) are formed from = 3 moles of \(O_2\)

Thus 0.6469 moles of \(H_2O\) are formed from =\(\frac{3}{2}\times 0.6469=0.9704moles\)  of \(O_2\)

Thus 0.9704 moles of \(O_2\) will react when 0.6469 moles of water are formed.

Answer:

32

Explanation:

There cannot be more in a number than the number. Therefore, the answer has to be D, or 32.

Hope this helps! :)

The ph-regulating mechanism that works most rapidly is the chemical buffer system, which consists of a weak acid and its conjugate base.

When there is an excess of acid or base in the body, the buffer system can quickly release or absorb hydrogen ions to maintain a stable pH. This system is most effective in the blood, where it helps to regulate the pH and prevent acidosis or alkalosis. However, if the buffer system is overwhelmed, other mechanisms such as the respiratory and renal systems come into play to help regulate pH levels.

Overall, the buffer system is the first line of defense in maintaining pH balance in the body. The pH-regulating mechanism that works most rapidly is the bicarbonate buffering system. This system plays a crucial role in maintaining the acid-base balance in the body. It consists of a weak acid (carbonic acid, H2CO3) and its conjugate base (bicarbonate ion, HCO3-).

The bicarbonate buffering system quickly neutralizes excess acid or base by either releasing or absorbing H+ ions, ensuring the blood pH remains within the normal range of 7.35 to 7.45. This rapid response is essential for maintaining proper physiological functions and preventing damage to body tissues.

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Answer:

Here's what I get.

Explanation:

1. Brønsted-Lowry theory

An acid is a substance that can donate a proton to another substance.

A  base is a substance that can accept a proton from another substance.

2. pH of ammonia

The chemical equation is

\(\rm NH$_{3}$ + \text{H}$_{2}$O \, \rightleftharpoons \,$ NH$_{4}^{+}$ + \text{OH}$^{-}$\)

For simplicity, let's re-write this as

\(\rm B + H$_{2}$O \, \rightleftharpoons\,$ BH$^{+}$ + OH$^{-}$\)

(a) Set up an ICE table.

                     B + H₂O ⇌ BH⁺ + OH⁻

I/mol·L⁻¹:     0.335             0        0

C/mol·L⁻¹:       -x                +x       +x

E/mol·L⁻¹:  0.335 + x          x         x

\(\rm K_{\text{b}} = \dfrac{\text{[BH}^{+}]\text{[OH}^{-}]}{\text{[B]}} = 1.8 \times 10^{-5}\\\\\dfrac{x^{2}}{0.335 - x} = 1.8 \times 10^{-5}\)

Check for negligibility:

\(\dfrac{0.335}{1.8 \times 10^{-5}} = 28 000 > 400\\\\x \ll 0.335\)

(b) Solve for [OH⁻]

\(\dfrac{x^{2}}{0.335} = 1.8 \times 10^{-5}\\\\x^{2} = 0.335 \times 1.8 \times 10^{-5}\\x^{2} = 6.03 \times 10^{-6}\\x = \sqrt{6.03 \times 10^{-6}}\\x = \text{[OH]}^{-} = \mathbf{2.46 \times 10^{-3}} \textbf{ mol/L}\)

(c) Calculate the pOH

\(\text{pOH} = -\log \text{[OH}^{-}] = -\log(2.46 \times 10^{-3}) = 2.61\)

(d) Calculate the pH

pH = 14.00 - pOH = 14.00 - 2.61 = 11.39

Answer:

So that we know how many electrons are thre in which shell and how many shells are present in an atom....

Explanation:

Hope it helps!!!

Answer: See below

Explanation:

n of CO2​ = 0.364mmol

Mass of C = 0.364*12 = 4.368 mg

n of H2​O = 184.37​ = 0.243 mol

The compound has 2*0.243mmol of H

Mass of H = 0.486 mg

Mass of O = 10.68 − (4.368+0.486) = 5.826mg

Moles of O = 0.364

C:H:O Ratios

0.364 : 0.486 : 0.364

= 1 : 1.34 : 1

= 3 : 4 : 3

So the empirical formula is C3​H4​O3​,

Empirical formula mass

= 88= 2 × Molar mass

And the molecular formula is C6​H8​O6

The process that is not a way for carbon dioxide to reach the atmosphere is Photosynthesis; option C

The carbon cycle is a biogeochemical cycle that describes the processes by which carbon is recycled between the living and non-living components of the environment.

The processes by which carbon is removed from the atmosphere and the processes by which carbon is returned to the atmosphere work together to ensure there is a balance of carbon in the environment.

The processes by which carbon is returned to the atmosphere in the form of carbon dioxide include the following:

The processes by which carbon is removed from the atmosphere include the following:

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Complete question:

Which of the following is not a way for carbon dioxide to reach the atmosphere?

a. forest fires

b. respiration

c. photosynthesis

d. burning of fossil fuels

The name given to a material that does not conduct thermal energy well is an insulator.

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Answer:

mgh is the formula for potential energy

A) The solute in tank B will dissolve first, is the key response.Temperature, pressure, and concentration are only a few examples of the variables that affect a solute's solubility in a solvent. As the water in both tanks A and B is originally pure.

in this instance the solute in tank B will dissolve first due to its larger concentration than in tank A. The concentration gradient between the solute and the water narrows as the solute in tank B dissolves and diffuses into the surrounding water, slowing the rate of dissolution. The solute in tank A will also eventually dissolve, but because of its lower initial concentration, it will do so more gradually.I am unable to tell which solute will dissolve first because the relevant illustration is not given. However, a number of variables, including temperature, pressure, and the chemical makeup of the solute and solvent, affect how soluble a solute is in a solvent. The solute that is more soluble in the given solvent will often dissolve first. It is impossible to predict which solute will dissolve first without more details or context.

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Answer:

The Internet started in the 1960s as a way for government researchers to share information. ... This eventually led to the formation of the ARPANET (Advanced Research Projects Agency Network), the network that ultimately evolved into what we now know as the Internet.

Answer:

243 miles in 3 hours

Explanation:

81 mph x 3 hours

243 miles in 3 hours

The element that we can be able to use for the experiment in place of potassium is sodium.

We know that the elements that can be found in the same group does react in the same way. Now we know that we have to look about among the options so that we would be able to know element that is in the same group as potassium.

Given that both sodium and potassium are members of group 1, we have to look out for the element that element thus we have to select sodium.

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Answer:

I dont understand what is the question you need help on-

Explanation:

The balanced chemical equation for the reaction between iron (Fe) and nitrogen (N) to form iron nitride (Fe2N) is: 6 Fe + N2 → 2 Fe2N

This equation is balanced because there are equal numbers of atoms of each element on both sides of the arrow, and the ratio of the reactants and products is 6:1 for Fe and N2, and 2:1 for Fe2N.

To balance the equation, we need to make sure that the number of atoms of each element is the same on both sides of the equation. Here's how we can do it:

On the LHS, we have 6 atoms of Fe and 2 atoms of N (since N2 consists of 2 nitrogen atoms bonded together).

On the RHS, we have 4 atoms of Fe (2 atoms in each Fe2N molecule) and 2 atoms of N (1 atom in each Fe2N molecule).

To balance the equation, we can multiply the reactants by 3 to get 6 Fe atoms and 6 N atoms:

6 Fe + 3 N2 → 2 Fe2N

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Answer:

translation: Write the electronic configuration of 2 metallic elements.

Answer:

(See explanation)

Explanation:

Copper: [Ar] 3d¹⁰ 4s¹

Silver: [Kr] 4d¹⁰ 5s¹

Answer

%Yield = 87.2%

Explanation

Given:

mass of NH3 reacted = 73 g

mass of H2O produced = 101 g

We know:

molar mass of NH3 = 17,031 g/mol

molar mass of water = 18.01528 g/mol

Required: % Yield

Solution:

The formula used to calculate the percentage yield is:

%Yield = (actual yield/theoretical yield) x 100

The actual yield of H2O produced = 101 g

Now lets calculate the theoretical yield first.

First find the number of moles of NH3, and use stoichiometry to find the theoretical mass of water.

n = m/M n is the moles, m is the mass and M is the molar mass.

n = 73/17,031 g/mol

n = 4.29 mol

Using the stoichiometry, there molar ratio between NH3 and H2O is 4:6

Therefore the moles of H2O = 4.29 x (6/4)

n of H2O = 6.43 mol

The theoretical mass can then be calculated:

m = n x M

m = 6.43 mol x 18.01528 g/mol

m = 115.83 g

%Yield = (101 g/115.83)*100

%Yield = 87.2%

Answer:

D a substance that increases the rate of a reaction without being used up itself in a reaction.

Explanation:

Examples are

ammonia synthesis ==> iron

sulfuric acid manufacture ==> nitrogen(II) oxide, platinum

cracking of petroleum==> zeolites

hydrogenation of unsaturated hydrocarbons ==> nickel, platinum, or palladium

I hope it helps

Answer:

Hey there!

The correct answer would be D. "a substance that increases the rate of a reaction without being used up itself in a reaction."

Hope this helps :)

The flask turning darker brown may indicate a chemical change that occurred inside the flask.

Some possible stresses that could have caused this change include:

Heat: If the flask was exposed to heat, it could have caused a chemical reaction to occur between the contents of the flask, resulting in a change in color.

Light: Certain compounds can be sensitive to light and undergo photochemical reactions that change their color. If the flask was exposed to light, this could have caused a chemical change that resulted in the darker brown color.

Chemical contamination: If the flask was contaminated with another substance, this could have caused a chemical reaction to occur between the original contents of the flask and the contaminant, leading to the darker brown color. For example, if the flask previously contained a solution of a metal salt and was then used to hold a different solution containing a reducing agent, this could have led to a reduction reaction and a change in color.

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Answer:

Electrons

Explanation:

In nuclear fission, atomic nuclei split into lighter atoms through loss of protons and neutrons (such as through loos of a beta particles - 2 protons and 2 neutrons). ... Electrons are not involved in nuclear reactions. Electrons are mainly involved in chemical

Answer:

Cell membrane

Explanation:

The melting point and the normal boiling point of water in respective temperatures in kelvins are 273 and 373. The correct option is 5.

The boiling point is the point of water when the water vapor of the water is equal to the water vapor of the atmosphere.

The melting point is the point when a solid-state converts into liquid, and changes its physical state.

In Celsius, the boiling point is 100⁰C

In Kelvin, 273 + 100 = 373 K

The melting point is ice is 0⁰C

273 + 0 = 273 K

Thus, the correct option is 5. 273 and 373.

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this is just 60 divided by 15, which is 4

so your answer is 4A :)

Answer:

60 divided by 15? That's 4 if that's what you're asking

Answer:

The speed of the car is 75 km per hour

Explanation:

Speed is distance over time so 150 km divided by 2 hours is 75km per hour.

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