Which molecule contains a nonpolar covalent bond?
A) H2
B) NH3
C) H₂O
D) CO

I'm pretty sure it's A)

The balanced net ionic equation for the main reaction between KI and (NH4)2S2O8 is: I- (aq) + S2O8^2- (aq) → I2 (s) + 2SO4^2- (aq). This reaction is fast.

The spectator ions are K+ (aq) and NH4+ (aq), as they do not participate in the reaction and remain in the same form on both sides of the equation.

This reaction is fast, as it occurs spontaneously and quickly upon mixing the two reactants.

In summary, the balanced net ionic equation for the reaction between KI and (NH4)2S2O8 is I- (aq) + S2O8^2- (aq) → I2 (s) + 2SO4^2- (aq), with K+ (aq) and NH4+ (aq) as the spectator ions, and the reaction is fast.

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Answer

2.06x 10²⁴ atoms

Procedure

To calculate the atoms in a molecule we will need to multiply the moles by Avogadro's number 6.0221408 x 10²³.

Answer: in the daytime the sun is out so the stars are not visible becuase the suns reflection! At night When you gaze at the constellations, every star produces an image that's the same size, but your retina isn't sensitive enough to respond to the outer parts of those images except for the brighter stars — which therefore look bigger than the fainter ones.

Explanation:

This is what I found on goog.le a while ago now it might actually help if I’m wrong I apologiz, I hope this was your quistion!

Answer:

B - To increase the rate of the reaction

Explanation:

Catalysts speed up the reaction without being reactants or products, so aren't used up in the reaction.

Answer:

HBr

Explanation:

Answer:

Thats the periodic table of elements

Explanation:

The law of conservation of mass states that mass cannot be created or destroyed in a chemical reaction, only rearranged. Therefore, the total mass of the reactants must equal the total mass of the products.

Starting with 0 g of calcium (Ca) and 1.9 g of fluorine (F2), we can calculate the total mass of the reactants:

Total mass of reactants = Mass of Ca + Mass of F2

Total mass of reactants = 0 g + 1.9 g

Total mass of reactants = 1.9 g

According to the problem statement, the reaction forms 3.9 g of calcium fluoride (CaF2). Therefore, the total mass of the products is:

Total mass of products = Mass of CaF2

Total mass of products = 3.9 g

Since the total mass of the reactants must equal the total mass of the products, we can set these two expressions equal to each other:

Total mass of reactants = Total mass of products

1.9 g = 3.9 g

This is a contradiction, as it is impossible for the mass of the reactants to be less than the mass of the products. Therefore, there must be an error in the problem statement or the given values.

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Answer:

creo q es electrico

Explanation:

The pH in the anode compartment of the cell is  15.2, indicating a highly basic environment.

Determine the pH in the anode compartment, we need to use the Nernst equation. The Nernst equation is:

Ecell = E°cell - (0.0592/n) * log(Q)

In this case, the anode half-reaction involves the reduction of hydrogen ions (H+) to hydrogen gas (\(H_2\)):

2H+ + 2e- → \(H_2\)

The standard half-cell potential for this half-reaction is not given, so we assume it to be 0 V.

Using the Nernst equation, we can rewrite it as:

0.45 V = 0 V - (0.0592/2) * log(\([H+]^2\))

Simplifying the equation gives:

0.45 V = -(0.0296) * log(\([H^+]^2\))

Now we can solve for [H+]:

log(\([H+]^2\)) = -0.45 V / (-0.0296)

\([H+]^2\) = \(10^{(-0.45 V / (-0.0296))\)

[H+] = \(\sqrt {(10^{(-0.45 V / (-0.0296)}))\)

Calculating the value of [H+] gives:

[H+] = \(10^{(-0.45 V / (-0.0296))} = 10^{15.2027027} = 6.3095734 x 10^{15} M\)

Taking the negative logarithm of [H+] gives the pH:

pH = -log([H+]) = -log(6.3095734 x \(10^{15\)) ≈ -15.2

Therefore, the pH in the anode compartment is 15.2. However, it is important to note that such a high pH value is extremely basic and might be unrealistic or unattainable in a practical system.

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To compute the fraction of tetrahedral interstitial sites occupied by carbon atoms in an iron-carbon alloy with 0.2 wt% carbon, we need to convert the weight percentage of carbon to a molar concentration and then relate it to the number of available interstitial sites.

The molar mass of carbon (C) is 12.01 g/mol. Assuming a total of 100 grams of the alloy, the weight of carbon is 0.2 grams (0.2 wt% of 100 grams). Converting this weight to moles using the molar mass, we have:

Number of moles of carbon = (0.2 g) / (12.01 g/mol) ≈ 0.0167 mol

Since each carbon atom occupies a tetrahedral interstitial site, the number of occupied sites is equal to the number of carbon atoms. The Avogadro's number (6.022 x 10^23) represents the number of entities (atoms or molecules) in one mole of a substance. Therefore, the fraction of occupied sites is given by:

Fraction of occupied sites = (Number of occupied sites) / (Total number of sites)

To determine the total number of tetrahedral interstitial sites, we need to know the crystal structure of the alloy and the arrangement of the iron atoms. Without this information, it is not possible to provide an accurate calculation of the fraction of occupied sites.

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You would need roughly 202 ml of water to dissolve 72 grams of salt at 25 degrees Celsius.

The solubility of the compound, salt in water at 25 degrees Celsius is stated to be 357 grams per liter (g/L).

Then we can say that 357 grams of salt can be dissolved in 1 liter (1000 milliliters) of water.

To find out how much water you need to dissolve 72 grams of salt, solve the ratio as

357 g : 1000 mL = 72 g : x mL

Solving for x gives:

x = (72 g × 1000 mL) / 357 g

x = 201.681 mL

If we approximate this value it becomes 202ml

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Answer:

R = 40 ohms

Explanation:

Two bulbs have a resistance of 20 ohms when working normally.

When they are placed in series, the combined resistance is given by :

R = R₁ + R₂

We have, R₁ = R₂ = 20 ohms

R = 20 +20

= 40 ohms

Hence, the combined resistance of the two bulbs is 40 ohms.

Answer:

In chemistry, the element configuration of an atom refers to the arrangement of its electrons in its outermost energy level, or valence shell. The element configuration is typically written using the symbols of the elements in the periodic table, and it is used to predict the chemical behavior of the atom.

One common way to write element configurations is in terms of noble gas configurations. A noble gas is a chemical element that is unreactive and stable due to its filled valence shell, and the noble gases are helium, neon, argon, krypton, xenon, and radon.

The reason why element configurations are often written in terms of noble gas configurations is that it makes it easier to predict the chemical behavior of the atom. For example, the element configuration of sodium is 1s22s22p63s1. This can be written in terms of the noble gas configuration of neon, which is 1s22s22p6, as [Ne]3s1. This notation indicates that the valence shell of sodium has the same electron configuration as the noble gas neon, plus one additional electron in the 3s subshell.

Similarly, the element configuration of chlorine is 1s22s22p63s23p5. This can be written in terms of the noble gas configuration of argon, which is 1s22s22p6, as [Ar]3d5. This notation indicates that the valence shell of chlorine has the same electron configuration as the noble gas argon, plus five additional electrons in the 3p and 3d subshells.

Therefore, element configurations are written in terms of noble gas configurations to provide a concise and easy-to-understand representation of the electron arrangements in the valence shells of atoms. This can help predict the chemical behavior of the atoms and aid in the understanding of the properties of chemical compounds.

The Pauli Exclusion Principle states that no two electrons in an atom can share the same set of quantum numbers. So, the given statement is False.

Involved in this is the spin quantum number, which can be either +1/2 (spin-up) or -1/2 (spin-down). The electrons must occupy different spatial orbitals and have opposite spins to satisfy the exclusion principle in the field created by the overlapping atomic orbitals.  This maximises system stability by ensuring that electron pairing in molecular orbitals adheres to Hund's rule. Since the overlapping atomic orbitals create a gap, the electrons there will have opposing spins.

So, the given statement is False.

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Answer:

Below

Explanation:

Heterozygous mean a dominant and a recessive gene.

S (dominant) = short needles

s (reccessive) = long needles

Parent 2 S s

Parent 1

S

s

S s

S SS Ss

s Ss ss

For an offspring to have long needles, both alleles have to be s ( recessive allele for long needle) or ss . That's only occurs in 1/4 pairing so the probability is 25%

Those elements that need to be in place before running the installation are: system requirements, software prerequisites, installation media, administrative privileges.

1. System requirements: It is essential to check the minimum system requirements for the software or application being installed. This includes factors such as processor speed, memory, disk space, and operating system compatibility. Ensuring that the system meets these requirements will prevent any compatibility issues.
2. Software prerequisites: Some installations may require certain software components to be already installed on the system. These could include frameworks, libraries, or drivers. It is important to identify and install these prerequisites before running the installation to ensure that the software can function properly.
3. Installation media: The installation files or media, such as CDs, DVDs, or downloaded files, need to be accessible and available before starting the installation process. This may involve inserting a disk or locating the downloaded files.
4. Administrative privileges: Most installations require administrative privileges to modify system files and settings. It is important to have the necessary administrative access to successfully run the installation.
By ensuring that these elements are in place before running an installation, users can minimize the risk of errors, compatibility issues, or incomplete installations.

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If you expand your lungs to 2.6 l, the new pressure inside your lungs is 0.9346 atm.

The new pressure inside your lungs can be determined by using the Boyle's Law equation: P₁V₁ = P₂V₂. This equation relates the initial pressure and volume of a gas to the final pressure and volume of the same gas.

In this case, the initial pressure (P₁) is 1.05 atm, the initial volume (V₁) is 2.3 L, and the final volume (V₂) is 2.6 L. We need to find the final pressure (P₂).

Plugging in the given values into the equation:

P₁V₁ = P₂V₂

(1.05 atm)(2.3 L) = P2(2.6 L)

Dividing both sides by 2.6 L to isolate P₂:

P₂ = (1.05 atm)(2.3 L) / (2.6 L)

P₂ = 0.9346 atm

Therefore, the new pressure inside your lungs is 0.9346 atm.

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The solutions to problems caused by nitrogen gas in solution at certain depths is by discouraging deep diving.

This involves moving around under water with the aid of special breathing equipment.

Limiting the depth of a dive should he encouraged as the maximum depth limit for a diver to use compressed air is 30 to 50 meters.

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The atomic number remains the same for all atoms of the same element.

The atom is composed of;

The electrons are found in the orbit while protons and neutrons are found in the nucleus of the atom.

The number of protons in an atom is its atomic number. It is the identity of an element. All atoms of the same element must have the same atomic number even though they may differ in mass number.

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Answer:

There are five types of kinetic energy: radiant, thermal, sound, electrical and mechanical. Let us look at some of the kinetic energy examples and learn more about the different types of kinetic

hope it is helpful to you

In summary:
- Cathode: Cu is produced.
- Anode: F2 is produced.

When current is applied to a molten mixture of CuF, NiCl2, and CaS, the following reactions can occur at the cathode and anode.

At the cathode, the reduction occurs. The metal ions with the highest reduction potential will be reduced first. Comparing the standard reduction potentials of Cu, Ni, and Ca, Cu has the highest reduction potential. Therefore, Cu will be produced at the cathode.

At the anode, oxidation occurs. The anions in the mixture are F-, Cl-, and S2-. Comparing their standard oxidation potentials, F- has the lowest (i.e., most positive) oxidation potential. Hence, F2 will be produced at the anode.

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Answer:

Número de masa: 12

Explanation:

Mass of an atom = protones + neutrons

5+7=12

Answer:

dont get it wet or it wont work at all

Answer:

b

Explanation:

glucose

During cellular respiration, a glucose molecule is gradually broken down into carbon dioxide and water. Along the way, some ATP is produced directly in the reactions that transform glucose. Much more ATP, however, is produced later in a process called oxidative phosphorylation. Oxidative phosphorylation is powered by the movement of electrons through the electron transport chain, a series of proteins embedded in the inner membrane of the mitochondrion.

Answer:

During cellular respiration, your cells release energy in the form of ATP (adenosine triphosphate), which is used as an energy source by the body. The energy released during cellular respiration comes from the breakdown of glucose, which is a type of sugar that is used by the body as a source of fuel. In addition to ATP, some heat is also released during cellular respiration, but this is not the primary product of the process. So the correct answer is a. Energy.

The characteristics of nuclear reactions allow to find the answers for the different questions are:

1) The total number of protons

2) The number of protons changes

3) Spontaneous emission of radiation

4) Sew one piece of fabric to another and form a larger one

5) There must be an unstable nucleus form in stable nuclei

6) The nuclei combine in a fusion reaction

7) There are no charged released

Nuclear reactions are the process by which atoms transform into other atoms, we fear two types of reactions:

It is asked to make a selection of which are the correct statements, for the different questions

1) In a nuclear reaction the amount of protons remains invariant, the neutral ones can be released or absorbed

The correct answer:  The total number of protons

2) A particula alpha is a nucleus with 2 protons, two neutrons, so it always changes from one element to another

The correct answer is: The number of protons changes

3) as described radioactive decay.

It is the process by which particles or radiation are emitted from the atomic nucleus

The correct answer is: Spontaneous emission of radiation

4) Fusion is a process by which two nuclei unite and a larger one is formed

The correct answer is: sew one piece of fabric to another and form a larger one

5) What to take into account when creating a disintegration model.

A mechanism must be created that allows the particle emission from the nucleus with the decrease of the total energy of the system

The correct answer is: There must be an unstable nucleus form in stable nuclei

6) Difference between fusion and chemical reaction

In the fusion other atoms are formed, in the chemical reaction the atoms remain unchanged

The correct answer is: The nuclei combine in a fusion reaction

7) How to describe the charged particles in the fusion

in a fusion reaction in general no charged particles are released, so all charged particles (protons are in the new nucleus

there is not image

The correct answer should be: There are no charged released

In conclusion with the characteristics of nuclear reactions lets find the results to the questions are:

1) The total number of protons

2) The number of protons changes

3) Spontaneous emission of radiation

4) Sew one piece of fabric to another and form a larger one

5) There must be an unstable nucleus form in stable nuclei

6) The nuclei combine in a fusion reaction

7) There are no charged released

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