The main function of a(n)______ is to help an interaction between two chemicals to occur, changing both chemicals.

Answer:

0.000435 kilometers

Explanation:

You divide the length of the value by divide the length value by 1e+6

Answer:

Man-made radiation is generated in range of medical, commercial and industrial activities and natural occuring radiation occurs due to minerals.

Answer:no idea

Explanation:

I js needed points

A radioactive substance decreases by 65% each hour. Find the hourly decay factor. The hourly decay factor is 0.35.

Chemicals in the class of radionuclides (also known as radioactive materials) have unstable atomic nuclei. They become stable by undergoing modifications in the nucleus (spontaneous fission, alpha particle emission, neutron conversion to protons, or the opposite).

A radioactive atom will naturally emit radiation in the form of energy or particles in order to transition into a more stable state. The difference between radioactive material and the radiation it emits must be made.

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The complete question is: Is the compound \(FeCl_{3}\) ionic or covalent ?

Answer: Compound  \(FeCl_{3}\) is an ionic in nature.

Explanation:

When a metal atom combines with a non-metal atom then transfer of electrons take place from metal towards the non-metal. As a result, an ionic bond is formed between the atom and compound formed is called an ionic compound.

For example, \(FeCl_{3}\) compound contains Fe atom which is a metal and Cl atom which is a non-metal. Hence, electrons will be transferred from Fe atom to the Cl atom forming an ionic bond.

Hence, \(FeCl_{3}\) is an ionic compound.

Thus, we can conclude that \(FeCl_{3}\) is an ionic compound.

Answer: The concentration of silver ions will be 3.87e-3 M.

Explanation:

Consider the balanced chemical equation for the dissolution of \(\text{AgSO}_4\) in pure water:

\(\text{AgSO}_4 \text{ (s)} \rightleftharpoons \text{Ag}^{2+} \text{ (aq)} + \text{SO}_4^{2-} \text{ (aq)}\)

The value of Ksp for silver sulfate is given as \(1.5 \times 10^{-5}\). We know that the expression for Ksp for the above equation is:

\(K_{sp} = [\text{Ag}^{2+}][\text{SO}_4^{2-}]\)

The concentration of the silver ions and sulfate ions are unknown, but they must be equal according to the chemical reaction. Then, replacing Ksp with the known value, and replacing the concentrations with "x" gives:

\(1.5 \times 10^{-5} = (x)(x) = x^2 \rightarrow 1.5 \times 10^{-5} = x^2 \rightarrow x = \sqrt{1.5 \times 10^{-5}} \approx 0.00387 \text{ M}\)

Therefore, the concentration of silver ions will be:

\([\text{Ag}^{2+}] = x = 0.00387 \text{ M} = 3.87 \times 10^{-3} \text{ M}\)

Therefore, the net ionic equation for the reaction is Copper(2+) (aq) + 2 chlorine- (aq) → Copper(II) chloride (aq).

Ammonium sulphate and Copper hydroxide precipitate are the first products of the reaction between copper sulphate and ammonium hydroxide.

Mixing copper(II) sulphate and ammonium chloride results in the following observations:

Conventional: When copper ions (Copper2+) from Copper(II) sulfate are present, a blue solution develops. The colour of Ammonium Chloride doesn't seem to have changed at all.

Ionic total: While Ammonium Chloride dissociates into Ammonium and Chlorine- ions in solution, Copper(II) sulfate dissociates into Copper2+ and Sulfate 2- ions.

Copper(II) sulfate (aq) + 2 Ammonium Chloride (aq) → Copper(II) Chloride (aq) + 2 Ammonium (aq) + Sulfate 2- (aq)

Net Ionic: The net ionic equation shows only the species involved in the reaction. In this case, the Copper2+ and the Cl- ions combine to form Copper(II) chloride.

Copper2+ (aq) + 2 Chlorine- (aq) → Copper(II) chloride (aq)

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(a)The pH of the fruit juice solution is approximately 3.5. (b) The hydrogen ion concentration of the tomato solution is 0.001 mol/L.

(b)The hydrogen ion concentration of the tomato solution is 0.001 mol/L.

(a). The hydrogen ion concentration of the fruit juice is 0.0003 mol/L. We can determine the pH of the solution using the formula pH = -log[H⁺].

pH = -log(0.0003)

pH ≈ -log(3 × 10⁻⁴)

Using a calculator, we can calculate the logarithm:

pH ≈ -(-3.5229) (rounded to the nearest tenth)

pH ≈ 3.5

Therefore, the pH of the fruit juice solution is approximately 3.5.

(b). A tomato has a pH of 3.0. We can determine the hydrogen ion concentration of this solution by rearranging the formula pH = -log[H⁺] to solve for [H⁺].

[H⁺] = 10(-pH)

[H⁺] = 10⁻³

[H⁺] = 0.001 mol/L

Therefore, the hydrogen ion concentration of the tomato solution is 0.001 mol/L.

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Answer:

1 cg = 10 mg

Explanation:

So, 89cg = 89 * 10 = 890mg!

Pls thank, 5star, and brainliest!

The inorganic substance with the chemical formula BaSO4 is barium sulfate (or sulphate). It is a tasteless, crystalline white substance that is insoluble in water.

A barium cation and a sulfate anion are the two elements that make up barium sulfate. There are four oxygen atoms joined to the sulfur. A sulfate salt of barium, known as BaSO4, is present in the mineral barite. It is a white crystalline substance that is soluble in strong acids but insoluble in water and alcohol.

Elements include both barium and bromine. Barium is a metal belonging to Group 2 of the modern periodic table, and bromine is a non-metal belonging to Group 17 (halogen).

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Answer:

The work done by the gas expansion is 5875 J,

Since the work done is positive, the work is done by the gas on the surroundings.

Explanation:

Given;

change in internal energy, ΔU = -4750 J

heat transferred to the system, Q = 1125 J

The change in internal energy is given by;

ΔU = Q - W

Where;

W is the work done by the system

The work done by the system is calculated as;

W = Q - ΔU

W =  1125 - (-4750)

W = 1125 + 4750

W = 5875 J

Since the work done is positive, the work is done by the gas on the surroundings (energy flows from the gas to the surroundings).

Therefore, the work done by the gas expansion is 5875 J

The correct answer is: Calcium phosphate dissolves in water at 25°C at a rate of 0.025 mg/mL.

The property that a substance exhibits in the solute for getting dissolved in a solvent in order to form a solution is defined as the solubility product. The ionic compounds that dissociate to form cations and anions in water vary more in terms of solubility.

The equilibrium constant for a solid material dissolving in an aqueous solution is the solubility product constant, Ksp. It stands for the degree of solute dissolution in solution. A substance's Ksp value increases with how soluble it is.

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Based on the tabulated data, compound B represents B) a metallic compound. Hence, option B) a metallic compound is the correct answer.

Characteristics of metals are:

Because electrons are mobile in metallic solids , they are good conductors of heat and electricity. Metallic solids are also malleable and ductile due to the ability of the metal nuclei to move past each other without disrupting the bonding.

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Answer:an ionic compound

Explanation:

Answer: this might have something to do with the pancreas

Explanation:

the pancreas produces insulin if subject a produces more insulin than subject b the reaction to the glucose will be different the pancreas breaks down the glucose into sugar and protiens hope this helps

The number of hamburgers sold on Wednesday is 275.

Let's assume the number of hamburgers sold is x.

According to the given information, the number of cheeseburgers sold is 70 more than the number of hamburgers. So, the number of cheeseburgers sold can be expressed as x + 70.

The total number of hamburgers and cheeseburgers sold is given as 620, so we can set up the following equation:

x + (x + 70) = 620

Combining like terms, we get:

2x + 70 = 620

Subtracting 70 from both sides of the equation:

2x = 550

Dividing both sides by 2:

x = 275

Therefore, the number of hamburgers sold on Wednesday is 275.

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Answer:

See explanation

Explanation:

A system is said to have attained dynamic equilibrium when the rate of forward reaction and the rate of reverse reaction are equal.

Considering the system under consideration;

I2(s)⇄I2(g)

Heating the container converts solid iodine to purple coloured iodine vapour.

At equilibrium, there will be no net change in the amount of solid iodine and iodine vapour present in the system because the two processes (forward and reverse reactions) occur at the same rate at equilibrium.

Answer:

Its when like two pure substances are like combined into one.

Explanation:

Answer: Polonium, Tellurium, Selenium, Sulfur

Explanation:

In our periodic trend, we know the ionization energy increases as we go left --> right and bottom --> top. In this example, in Group 16, sulfur is above the other 3.

Answer:

1. linear (A)

2. trigonal-planar (C)

3. tetrahedral (B)

4. linear (A)

Explanation:

Just did it on Edge 2020

The shape of a molecule can be predicted from the number of electron pairs that surround the central atom in the molecule.

The Valence Shell Electron Pair repulsion theory gives us a basis for predicting the shape of molecules. The shape of a molecule can be predicted from the number of electron pairs that surround the central atom in the molecule.

In the image shown, We can see that in HCN , carbon is the central atom and is surrounded by two atoms and no lone pairs. Since there are two electron domains around the central atom, the molecule is linear.

In the second structure, BH3 has boron as its central atom. Three electron domains surround the central atom hence the molecule is trigonal planar.

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The linen wrapping is approximately 6555 years old.

We know that the half-life of carbon-14 is 5750 years, which means that every 5750 years, the amount of carbon-14 in a sample will be reduced by half. Therefore, we can use this information to calculate the age of the linen wrapping.
n = (ln(percentage of carbon-14 remaining)) / (ln(0.5))
where n is the number of half-lives that have passed.
Using the percentage of carbon-14 remaining in the linen wrapping (75.3%), we can plug this into the formula:

n = (ln(75.3%)) / (ln(0.5))
n = 0.788 / 0.693
n = 1.14
This means that 1.14 half-lives have passed since the linen wrapping was made.
Next, we can calculate the age of the linen wrapping by multiplying the half-life by the number of half-lives:
Age = half-life x number of half-lives
Age = 5750 years x 1.14
Age = 6555 years
Therefore, the linen wrapping is approximately 6555 years old.

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Answer: 3.6

Explanation: You use the formula pH = -log([H+]) and plug in the 2.4E-4 with a negative log. After you convert H+ to the pH, you will change the final answer of 3.62 to the correct amount of significant figures which is 3.6.

Answer:

Here is the correct answer. 3.6

To prepare the pH 4.00 buffer solution, you should mix approximately 61.35 mL of the 0.100 M benzoic acid solution with 38.65 mL of the 0.240 M sodium benzoate solution.The ratio of benzoic acid to sodium benzoate in the buffer solution using the Henderson-Hasselbalch equation.

To prepare a pH 4.00 buffer solution using benzoic acid and sodium benzoate, we need to calculate the appropriate volumes of the 0.100 M benzoic acid and 0.240 M sodium benzoate solutions.

First, we need to determine the ratio of benzoic acid to sodium benzoate in the buffer solution. The Henderson-Hasselbalch equation can help us with this calculation:

pH = pKa + log([A-]/[HA])

Given that the pH is 4.00 and pKa is 4.20, we can rearrange the equation:

log([A-]/[HA]) = pH - pKa

log([A-]/[HA]) = 4.00 - 4.20

log([A-]/[HA]) = -0.20

Next, we take the antilog of -0.20 to find the ratio of [A-] to [HA]:

[A-]/[HA] = antilog(-0.20)

[A-]/[HA] = 0.63

The ratio of [A-] to [HA] is 0.63.

Now, let's calculate the volumes of each solution needed. Let's assume x represents the volume (in mL) of the 0.100 M benzoic acid solution and y represents the volume (in mL) of the 0.240 M sodium benzoate solution.

Since the total volume is 100.0 mL, we have the equation: x + y = 100

Considering the ratio of [A-] to [HA] as 0.63, we can write the equation: y/x = 0.63

Solving these two equations simultaneously will give us the volumes of each solution:

x + y = 100

y/x = 0.63

By substituting y = 0.63x from the second equation into the first equation, we get:

x + 0.63x = 100

1.63x = 100

x = 61.35 mL (rounded to two decimal places)

Substituting this value back into the equation x + y = 100, we find:

61.35 + y = 100

y = 38.65 mL (rounded to two decimal places)

Therefore, to prepare the pH 4.00 buffer solution, you should mix approximately 61.35 mL of the 0.100 M benzoic acid solution with 38.65 mL of the 0.240 M sodium benzoate solution.

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The combine mass of the sled and the rider, given that each dog pulled with a force of 30 N is 200 Kg

We know that force is related to mass and acceleration according to the following formula:

Force (F) = mass (m) × acceleration (a)

F = ma

With the above formula, we can determine the combined mass of the sled and rider. Details below.

From the question given above, the following data were obtained:

The combined mass can be obtained as follow:

Force = mass × acceleration

240 = mass × 1.2

Divide both sides by 1.2

Mass = 240 / 1.2

Mass = 200 Kg

Thus, the combine mass is 200 Kg

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3 half-lives have occured

Given

Half-life Radon-222 = 3.8 days

12.5% of Rn-222 remains

Required

Half-lives  occurred

Solution

General formulas used in decay:  

\(\large{\boxed{\bold{N_t=N_0(\dfrac{1}{2})^{t/t\frac{1}{2} }}}\)

T = duration of decay  

t 1/2 = half-life  

N₀ = the number of initial radioactive atoms  

Nt = the number of radioactive atoms left after decaying during T time  

12.5% of Rn-222 remains ⇒ Nt/No = 0.125

Input the value :

\(\tt 0.125=\dfrac{1}{2}^{t/3.8}\\\\\dfrac{1}{2}^3=\dfrac{1}{2}^{t/3.8}\\\\3=t/3.8\\\\t=11.4\rightarrow 3~half-lives\)

When 2 mole of Fe2O3 and 9 molecules of CO react, 6 moles of the each product are created.

The term "mole" refers to a common scientific measurement unit for atoms, molecules, and other very small particles.

The first one is supposed to produce a balanced chemical reaction in accordance with the situation supplied.

FeO3 + 3 CO 2 Fe + 3CO2 is the formula.

Because 2 moles of Fe2O3 reacted with 3 x2=6 moles of Co to produce Fe and CO2, CO was in excess and Fe2O3 was the limiting reagent.

Utilize the mole ratio to determine the moles of the each product.

That is the Fe2O3 mole ratio: Because Fe is a 1:2 element, the mole of Fe is 2x2=4 moles.

Because the mole ratio of Fe2CO3 to CO2 is 1:3, the moles of Co2 are 2 x 3 = 6 moles.

Therefore, 6 moles of the each product will be created when 2 moles or Fe2O3 react to 9 moles of CO.

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Explanation:

H² + Br² = 2HBr

2Mg + O² = 2MgO

2H² + O² = 2H²O

hope this helps you

Answer:

H² + Br² = 2HBr

2Mg + O² = 2MgO

H² + O² = 2H2O

HOPE IT'S WORK

The temperature will be 1200 K when the pressure increases to 400 kPa and the volume remains constant.

We can use the combined gas law to solve this problem:

(P1 x V1) / T1 = (P2 x V2) / T2

where P1, V1, and T1 are the initial pressure, volume, and temperature, and P2 and T2 are the final pressure and temperature.

In this case, the initial conditions are:

P1 = 100 kPa

V1 = 3.0 L

T1 = 300 K

The final pressure is:

P2 = 400 kPa

Since the volume remains constant, V2 = V1 = 3.0 L.

We can solve for T2:

(P1 x V1) / T1 = (P2 x V2) / T2

(100 kPa x 3.0 L) / 300 K = (400 kPa x 3.0 L) / T2

T2 = (400 kPa x 3.0 L x 300 K) / (100 kPa x 3.0 L)

T2 = 1200 K

Therefore, the temperature will be 1200 K when the pressure increases to 400 kPa and the volume remains constant.

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