Molar mass of Fe2O3 = g/mol

The balanced reaction of this chemical reaction is as follows :

• As we can see, this is a double-displament reaction

\(\tt \large{\boxed{\bold{Nt=No.(\frac{1}{2}) ^{\frac{T}{t1/2} } }}\)

Nt/No = 1/8

T = duration of decay

t 1/2 = half-life

\(\tt \dfrac{1}{8}=\dfrac{1}{2}^\dfrac{T}{5}}\\\\(\dfrac{1}{2})^3=\dfrac{1}{2}^\dfrac{T}{5}}\\\\3=\dfrac{T}{5}\rightarrow T=15~years\)

Answer:

smallest to largest:

Electron, Neutron, Atom, Molecule, Nucleus

Explanation:

sorry if it's not right

Electron--Neutron--Nucleus-- atom--Molecule is the order from smallest to largest.

Electron is the smallest subatomic particles having the radius is about 9.1× 10−31 kg while on the other hand, the size of neutrin is 1.7×10−15 meters. Both neutron and proton are present in the nucleus so nucleus is bigger than neutron. Nucleus is present inside an atom so atom is bigger than nucleus whereas atom is smaller than molecule.

So we can conclude that Electron--Neutron--Nucleus-- atom--Molecule is the order from smallest to largest.

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The approximate concentration of H3O+ in the 1.26 M NH4+ (aq) solution is 7.1 × 10⁻¹⁰ M.

The dissociation of ammonium ions in water is:

NH4+ (aq) + H2O (l) ⇌ NH3 (aq) + H3O+ (aq)

Also given that, Ka = 5.6 × 10⁻¹⁰

Calculate H3O+ in the solution usingKa = 5.6 × 10⁻¹⁰:

Ka = [H3O+][NH3] / [NH4+]

Since NH3 and H3O+ concentrations are in the same reaction:

5.6 × 10⁻¹⁰ = [H3O+][H3O+] / 1.26 M

Solve for [H3O+]:

[H3O+] = 7.056 × 10⁻¹⁰ M

[H3O+] = 7.1 × 10⁻¹⁰ M

Therefore, the concentration of H3O+ is 7.1 × 10⁻¹⁰ M.

Option A) 7.1 × 10⁻¹⁰ M is the correct answer.

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The substance that is in aqueous state in the reaction is LiOH from the equation shown.

An aqueous state is a state in which a substance is dissolved in water. This implies that the substance is in solution.

Thus, the substance that is in aqueous state in the reaction is LiOH from the equation shown.

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Answer:

C

Explanation:

Answer:

A. the right side

Explanation:

Taking into account the definition of covalent bond, the correct answer is option A.) right side of the periodic table contain atoms that form covalent bonds.

The covalent bond is the chemical bond between atoms where electrons are shared, forming a molecule. Covalent bonds are established between non-metallic elements. These elements have many electrons in their outermost level (valence electrons) and have a tendency to gain electrons to acquire the stability of the electronic structure of noble gas. The shared electron pair is common to the two atoms and holds them together.

In other words, a covalent bond is a force that joins two atoms of non-metallic elements to form a molecule. Atoms share pairs of electrons from their valence shell to achieve the stability of the molecule formed. The tendency of the elements to reach a stable configuration is known as the octet rule.

Finally, since the nonmetallic elements are found on the right side of the periodic table, the correct answer is option A.) right side of the periodic table contain atoms that form covalent bonds.

Learn more:

Answer:

1) 3s²  -  Magnesium 12

2)2s² 2p³ -  Nitrogen  7

3) 3s² 3p⁵ - Chlorine  17

Answer:

cation - electron loss hence positive charge

anion - electron gain hence negative charge

The given terms are correctly paired thus: anion is to electron gain while cation is to electron loss.

Ionic bond formation is defined as the formation of an ionic bond during a chemical reaction whereby an atom losses electrons while another gains electrons through transfer of these electrons.

For example in the formation of the compound NaCl. Sodium is the element that donates an electron from its outermost shell to chloride. Therefore, the sodium atom is the cation.

Also the chloride element would accept electron from the sodium, therefore, it is called the anion.

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0.342 mol Ca

Math

Pre-Algebra

Order of Operations: BPEMDAS

Chemistry

Atomic Structure

Stoichiometry

Step 1: Define

13.7 g Ca

Step 2: Identify Conversions

Molar Mass of Ca - 40.08 g/mol

Step 3: Convert

Step 4: Check

Follow sig fig rules and round. We are given 3 sig figs.

0.341816 mol Ca ≈ 0.342 mol Ca

If she suddenly feels terrified and thinks she is going to faint, it sounds like Dana may be experiencing panic attacks.

Panic attacks can be triggered by a variety of things, such as stress, anxiety, or even physical sensations. During a panic attack, the body's fight or flight response is activated, causing symptoms such as a rapid heart rate, shortness of breath, and a feeling of impending doom.

It's important for Dana to seek medical attention to rule out any underlying medical conditions, and to speak with a mental health professional to address any anxiety or stress that may be contributing to her panic attacks. There are treatments available, such as therapy and medication, that can help manage and reduce the frequency of panic attacks.

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That oil sands executive is greedy and heartless and therefore can't be trusted when she claims is Ad hominem attack. So, Option B is correct.

4-  The argument in question 4 is an example of an ad hominem attack. This is due to the argument's focus on the character of the oil sands executuive rather than the actual problem, which is how to improve the company's environmental record.

The argument holds that the executive cannot be believed when she says she wants to improve the company's environmental record because she is avaricious and callous. This is an error in logic, though, as the executive's character may not necessarily be related to the company's environmental policies.

5-  The argument in question 5 is an example of an appeal to ignorance. This is because the argument states that there is no proof that humans are causing climate change, so it must be natural causes. Just because there is no conclusive proof that humans are causing climate change, it does not mean that they are not.

The argument assumes that just because there is no evidence to the contrary, the argument must be true. This is a logical fallacy.

So, Option B is correct.

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When the temperature is 2°C, a gas sample is collected in a 2. 2-L tank. the Kelvin temperature of the gas is 275.15K

To convert a temperature from Celsius to Kelvin, simply multiply it by 273.15 degrees Celsius. So, in this instance, we have:

Celsius temperature + 273.15 K Kelvin temperature = 2°C + 273.15 K Kelvin temperature = 275.15 K

As a result, the gas's Kelvin temperature is 275.15 K.

The Kelvin temperature unit is used in the scientific community. It is an absolute temperature scale, with 0 Kelvin representing the absolute coldest temperature possible.

One Kelvin degree is the same size as one Celsius degree, but the zero point on the Kelvin scale is 273.15 degrees different from the Celsius scale. To convert a temperature from Celsius to Kelvin, simply multiply it by 273.15 degrees Celsius. Kelvin temperatures are widely used in scientific and engineering applications, especially thermodynamics and materials science.

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If a TLC plate is placed in a jar where the solvent level is above the level of the origin (sample spot), the solvent will reach and dissolve the sample before it has a chance to form a spot. This can cause the sample to spread out and interfere with the accuracy of the results.

If you inadvertently spotted your TLC plate too low, one solution would be to let the solvent front reach the bottom of the plate, let the solvent evaporate, and then re-develop the plate with fresh solvent. This will help to avoid any interference from previous runs and ensure accurate results. Another solution would be to scrape off the low spots and re-spot the sample higher up on the plate. It's also a good practice to make a note of the error in your lab notes so that you can take it into account when interpreting your results

A TLC plate, or Thin Layer Chromatography plate, is a type of chromatography used in analytical chemistry to separate and identify components in a mixture. It consists of a solid substrate, usually made of glass, plastic, or aluminum, coated with a thin layer of adsorbent material, such as silica gel or aluminum oxide

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Answer:

antibiotic traces because they can always put more of something and less of something

Explanation:

To calculate the molarity of a solution, you need to know the number of moles of the solute (OsF3) and the volume of the solution in liters.

First, let's calculate the number of moles of OsF3:

Molar mass of OsF3 = 247.224 g/mol

Mass of OsF3 in the beaker = 217 grams

Number of moles of OsF3 = Mass of OsF3 / Molar mass of OsF3

= 217 g / 247.224 g/mol

Next, we need to calculate the volume of the solution in liters:

Volume of the solution = 0.0673 liters

Now we can calculate the molarity:

Molarity = Number of moles of solute / Volume of solution

Substituting the values, we get:

Molarity = (217 g / 247.224 g/mol) / 0.0673 L

Calculating this expression, we find the molarity of the OsF3 solution.

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Answer:

A, im gonna say. Hopefully this helps!

Explanation:

Length is horizontal, and A is horizontal too.

Answer:

The answer is A please mark brainliest

Explanation:

Option A is the way of representing concentration that the hydrogeologist should employ to describe the density of lead in the water.

Ppm or ppb. The following details should be taken into account Ppm stands for parts per million. Ppb stands for parts per billion. • We know that one part in a million equals one part in a billion. • The same method should be employed for water concentration. 1 Water concentrations can also be expressed in fractions of a million (ppm) or parts for every billion (parts per billion) (ppb). This relationship can be used to convert between parts per million and parts per billion: 1 part in a thousand equals 1,000 parts in a billion.

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The complete question is:

Which method of expressing concentration should the hydrologist use to describe the concentration of lead in the water?

A) ppm or ppb

B) volume percent

C) mass-volume percent

D) mass percent

False. Chemical reactions reach equilibrium when the rates of the forward and reverse reactions become equal. This means that the amount of reactants and products present in the system remain constant over time.

While it is true that some reactions may appear to have reached equilibrium because one of the reactants is used up, this is not always the case. In some cases, the reaction may continue to occur, but at a slower rate, until equilibrium is reached. Additionally, some reactions may involve multiple reactants or products, making it more complex to determine if one reactant being used up is the sole reason for equilibrium being reached.
False. Chemical reactions generally reach equilibrium not because one of the reactants is used up, but because the rates of the forward and reverse reactions become equal. At equilibrium, the concentrations of reactants and products remain constant, but they do not necessarily become zero. The reaction continues to occur in both directions, but the net effect is zero, as the formation of products and consumption of reactants occur at the same rate. Equilibrium is a dynamic state that reflects the balance between the forward and reverse reactions.

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Omitted question:I think you mean Gas A and D each exert 120 mm Hg, if Gas D has a different value , just lug it into he equation as shown below and solve.

Answer:Gas C= 670mmHg

Explanation:

According to Dalton law of partial pressure

The total pressure of a mixture of gases is the sum of the pressures of each gas and can be illustrated as

Pressure total=P1+P2+… +Pn.

Total Pressure = Gas A + Gas B + Gas C + Gas D + Gas...

Now we have

Total Pressure = 120 mm Hg + 50mm Hg + Gas C + 120 mm Hg

960mmHg = 120 mm Hg + 50mm Hg + Gas C + 120 mm Hg

960mmHg =290mmHg +Gas C

Gas C =960mmHg -290mmHg

Gas C= 670mmHg

There are 44.62 grams of nitrogen gas in the balloon with a volume of 35.7 L at STP.

The volume of a balloon is 35.7 L at STP.

STP is the abbreviation for Standard Temperature and Pressure, which means a temperature of 273.15 K and a pressure of 101.325 kPa.

The number of grams of nitrogen gas in a balloon of this volume is requested.

A mole of any element has 6.02 × 1023 atoms, and the atomic mass of nitrogen is 14.01 grams.

One mole of a gas is equal to its molar volume, which is 22.4 L at STP. 1 mole of N2 gas = 28.02 g of N2 gas

STP's molar volume is 22.4 L, and the balloon's volume is 35.7 L.

That is, there are 35.7/22.4 moles of N2 gas in the balloon.= 1.59 moles of N2 gas

Since one mole of N2 gas weighs 28.02 g, 1.59 moles of N2 gas will weigh:

28.02 g/mol × 1.59 mol = 44.62 g

Therefore, there are 44.62 grams of nitrogen gas in the balloon with a volume of 35.7 L at STP.

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Answer:

hyposthesis

Explanation:

The direction of V is 39.29° (approx) below the negative x-axis.Hence, the direction of V is 39.29° (approx) below the negative x-axis.

Given that Vx​=7.70 units and

Vy​=−6.00 units.

We need to determine the (a) the magnitude and (b) direction of V.

Step 1:Let's apply Pythagoras theorem to find the magnitude of V.

It is given that, Vx​=7.70 units and Vy​=−6.00 units.

By Pythagoras theorem, we have,

V = √Vx​2 + Vy​2V

= √(7.70)2 + (−6.00)2V

= √(59.29) V = 7.70 units (approx)

Therefore, the magnitude of V is 7.70 units (approx).

Step 2:Let's determine the direction of V.Since Vx​=7.70 units is positive and Vy​=−6.00 units is negative.

Therefore, the vector V lies in the fourth quadrant.In the fourth quadrant, tanθ = Vy​/Vx​tanθ

= (-6.00) / (7.70)tanθ

= - 0.77922θ

= tan-1 (-0.77922)θ

= -39.29°

The direction of V is 39.29° (approx) below the negative x-axis.Hence, the direction of V is 39.29° (approx) below the negative x-axis.

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Explanation:

what is an atom?

An atom is a basic building block of matter.

Answer:

True

Explanation:

Answer:

True

Explanation:

Most people stick to what they know and don't look for a laughing place.

Protons (H⁺) are pumped across the inner mitochondrial membrane as part of the process called electron transport chain, which is an essential step in cellular respiration.

The electron transport chain is responsible for generating adenosine triphosphate (ATP), the main energy currency of cells.

During cellular respiration, electrons are transferred from high-energy molecules (such as glucose) through a series of electron carriers embedded in the inner mitochondrial membrane. As electrons pass through the electron transport chain, energy is released and used to pump protons (H⁺) from the mitochondrial matrix to the intermembrane space.

There are some several reasons;

Establishing an Electrochemical Gradient; The pumping of protons across the inner mitochondrial membrane creates an imbalance of protons, resulting in a higher concentration of protons in the intermembrane space compared to the matrix.

Generation of ATP; The electrochemical gradient created by the proton pumping is utilized by ATP synthase, an enzyme complex embedded in the inner mitochondrial membrane.

Coupling Electron Transport with Proton Pumping; The pumping of protons across the inner mitochondrial membrane is coupled with the flow of electrons through the electron transport chain.

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