A chunk of copper has a volume of 1.45 mL and a mass of 12.93 grams. What is the density of the chunk of copper?

To prepare a 0.12 M solution of FeCl₃, the amount of solid FeCl₃ to be dissolved in a given volume of solvent will be 9.72 grams.

Given,

Molarity of FeCl₃ (M)= 0.12 M

The molecular weight (m) of FeCl₃ is  = 162 gm

The volume of the solution (V) to be prepared is =500 ml

The amount of FeCl₃ to be dissolved to make a 0.12 M solution is= x

So,

MV= x ÷ m × 1000

0.12× 500 = x ÷ 162 × 1000

x = 60 × 162 ÷ 1000

x= 9.72 gm

So 9.72 grams of FeCl₃ is dissolved to make 500 ml of 0.12 M solution.

For preparing 0.4 M HCl from 4M HCL:

If we need to make 500 ml of solution with 0.4M of HCL, then we use the formula:

M₁V₁= M₂V₂

0.4 × 500= 4 × x

x= 50 ml

So 50 ml of 4M HCL is taken to make 0.4 M HCL.

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Answer:

I'm not really sure how but here's the formula?

To calculate theoretical yield first check chemical equations are balanced.  Calculate the mole ratios of the reactants and products, Find the theoretical yield of the reaction.

Percent Yield = Mass of Actual Yield / Mass of Theoretical Yield x 100 percent.

The theoretical yield is the quantity of product that stoichiometry predicts will be produced, whereas the actual yield is the amount that is actually produced.

The yield of a reaction is used to represent how much of a product is produced from that reaction.

Thus, Divide the ratio by the limiting reactant's molecular weight. The answer is the theoretical yield of the desired product in moles.

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Answer:

The combined gas law equation is:

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

The volume of the gas at 30 °C is approximately 760.67 mL.

To determine the volume of the gas at 30 °C, we can use the combined gas law equation, which relates the initial and final conditions of temperature and volume for a gas.

The combined gas law equation is:

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

Where:

P1 and P2 are the initial and final pressures, respectively

V1 and V2 are the initial and final volumes, respectively

T1 and T2 are the initial and final temperatures in Kelvin, respectively

We need to convert the temperatures from Celsius to Kelvin by adding 273.15 to each value.

Given:

V1 = 550 mL

T1 = -55 °C = 218.15 K

T2 = 30 °C = 303.15 K

Assuming the pressure remains constant, we can rearrange the equation to solve for V2:

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

Since the pressure is not specified in the problem, we can assume it remains constant, allowing us to cancel out the pressure terms. Thus, the final equation becomes:

V2 = (V1 * T2) / T1

Plugging in the given values:

V2 = (550 mL * 303.15 K) / 218.15 K

Simplifying the calculation, we find:

V2 ≈ 760.67 mL

Therefore, the volume of the gas at 30 °C is approximately 760.67 mL.

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An average brightness was calculated for each length of graphite tested to get a better understanding of the relationship between the length of the graphite and the brightness of the line it produced.

Graphite has many uses in various industries. Some of its uses include: Pencils, Lubricants, Refractories, Batteries, Electrodes, Nuclear reactors, Aerospace industry.

By calculating the average, it is possible to see if there is a trend in the data and if longer or shorter lengths of graphite produce brighter or duller lines. This information can be useful in determining the best length of graphite to use for a particular task or project.

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Answer:

hydrochloric acid

Explanation:

chemical compound any substance composed of identical molecules consisting of atoms

the answer is mitosis

Answer:

See explanation

Explanation:

PO4{3-} is phosphate
Sulfite's formula is SO3{2-}
Sulfate is SO4{2-}
OH- is hydroxide
Note: {x±} signifies the charge of the entire molecule

The polyatomic ions in question are phosphite ion, sulfite ion, and sulfate ion.

The formula PO3−4 represents the polyatomic ion called phosphite ion. It is composed of one phosphorus atom bonded to three oxygen atoms. The name of the sulfite ion is SO3−2, and it consists of one sulfur atom bonded to three oxygen atoms. Lastly, the sulfate ion has the formula SO4−2, and it is composed of one sulfur atom bonded to four oxygen atoms.

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Answer:

iron oxide. aka. oxygen

Explanation:

Rust is the result of a chemical reaction between iron and oxygen, otherwise known as iron oxide. Since steel wool -- and steel in general -- is largely made of iron, steel wool is prone to rust if it doesn't have a rustproof coating on it. The actual reaction that creates rust happens when two iron atoms mix with three oxygen atoms in water; the oxygen bonds to the metal, and a new compound is formed.

Approximately 166.67 mL of water needs to be evaporated from 250 mL of 1 M Ca(OH)2 to make it 3 M.

The relationship between the initial and final concentrations and volumes must be taken into account.

Given: Initial concentration \((C^1) = 1 M Initial volume (V^1) = 250 mL\)

\((C^2) = 3 M final concentration\)

We can use the equation:

\(C^1 * V^1 = C^2 * V^2\)

Where:

\(V^2\)is the final volume of the solution

Rearranging the equation to solve for V2:

\(V^2 = (C^1 * V^1) / C^2\)

Substituting the given values:

\(V^2 = (1 M * 250 mL) / 3 M\)

\(V^2 = 250 mL / 3\)

\(V^2\) ≈ \(83.33 mL\)

To find the amount of water that needs to be evaporated, we subtract the final volume from the initial volume:

Amount of water to be evaporated = \(V^1 - V^2\)

Amount of water to be evaporated = 250 mL - 83.33 mL

Amount of water to be evaporated ≈ 166.67 mL

Therefore, approximately 166.67 mL of water needs to be evaporated from 250 mL of 1 M Ca(OH)2 to make it 3 M.

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Answer: D. Intensity

Explanation: Intensity is correct, because if you originally were working on a treadmill with a speed of 8, that is how much intensity your putting your body on. And if you put the speed for a treadmill at 11 to increase your exercise, you are increasing the speed you have to run, making it more intense. The more intense you make your workout or training, the more stressful exercise you are doing.

Hope this helps,

:)

The result of the computation when you follow the steps is 1.699.

A logarithm is a mathematical function that represents the exponent or power to which a specific base must be raised to obtain a given number. In simpler terms, it answers the question: "To what power must we raise a base number to obtain a certain value?"

What you should do is that on your calculator, you could press the logarithm key and then put in the value that has been shown and then the result would be displayed on your calculator.

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Answer:

Look at it closer, its very easy to understand

Explanation:

read the questions thoroughly, then answer the questions.

Answer:

s

Explanation:

The society with the least negative effects on the environment is probably the one with a small population, traditional farming methods, no access to contemporary technology, and self-sufficient food production.

This is due to the fact that their way of living is less dependent on modern infrastructure and technology, both of which have a negative impact on the environment. Additionally, their agricultural methods are probably more environmentally friendly and sustainable.

The environmental effects of the other societies on the list would all be greater. Because of the use of fossil fuels and the production of products that require a lot of resources, a big, industrialized society with high levels of consumption would have a significant carbon footprint.

It would still take a lot of resources to maintain its infrastructure and create products in a less populous, highly industrialized society with moderate consumption levels, which would have a negative effect on the environment.

Given that the size of the population alone would necessitate significant resource consumption and infrastructure development, a big population with moderate industrialization and consumption levels would also have a big effect on the environment.

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Answer:

1.79 L

Explanation:

Step 1: Given data

Step 2: Convert T₁ to Kelvin

We will use the following expression.

K = °C + 273.15

K = 25.0 °C + 273.15 = 298.2 K

Step 3: Calculate the final volume of the gas

We will use the combined gas law.

P₁ × V₁ / T₁ = P₂ × V₂ / T₂

V₂ = P₁ × V₁ × T₂ / T₁ × P₂

V₂ = 745.0 mmHg × 2.00 L × 273 K / 298.2 K × 760.0 mmHg = 1.79 L

Answer:

V₁ = 808.9mL

Explanation:

Based on Charles's law, the volume of a sample of gas is directely proportional to its absolute temperature. The formula is:

\(\frac{V_1}{T_1} =\frac{V_2}{T_2}\)

Where V is volume and T is absolute temperature of 1, initial state and 2, final state of the gas.

The initial state is:

V₁ = Our incognite

T₁ = 79°C + 273.15 = 352.15K

Final state is:

V₂ = 990.4mL

T₂ = 158°C + 273.15 = 431.15K

Replacing:

\(\frac{V_1}{352.15K} =\frac{990.4mL}{431.15K}\)

Considering the Charles's Law,  the volume at 79 °C is 808.86 mL.

Charles's Law consists of the relationship that exists between the volume and the temperature of a certain quantity of ideal gas, which is maintained at a constant pressure.

This law says that for a given sum of gas at a constant pressure, as the temperature increases, the volume of the gas increases and as the temperature decreases, the volume of the gas decreases because the temperature is directly related to the energy of the movement they have the gas molecules.

In summary, Charles's law is a law that says that when the amount of gas and pressure are kept constant, the quotient that exists between the volume and the temperature will always have the same value:

\(\frac{V}{T}=k\)

Studying two different states, an initial state 1 and a final state 2, it is satisfied:

\(\frac{V1}{T1}=\frac{V2}{T2}\)

In this case, you know:

Replacing in Charles's law:

\(\frac{V1}{352 K}=\frac{990.4 mL}{431 K}\)

Solving:

\(V1=\frac{990.4 mL}{431 K}x352 K\)

V1=808.86 mL

Finally, the volume at 79 °C is 808.86 mL.

Learn more:

Answer:

dryhnjkftglqawghbnjsdfmkpohbgfddfvgb

Explanation:

In the given reaction, the reactants are hydrochloride acid (HCI) and sodium hydroxide (NaOH). The products are sodium chloride (NaCl) and water.

The chemical equation provided represents a neutralization reaction between hydrochloric acid (HCI) and sodium hydroxide (NaOH) in aqueous solution.

A neutralization reaction is a type of double displacement reaction in which an acid and a base react to form salt and water.

The reactants in this equation are hydrochloric acid (HCI) and sodium hydroxide (NaOH). Hydrochloric acid is a strong acid that dissociates in water to form hydrogen ions (H+) and chloride ions (Cl-). Sodium hydroxide, on the other hand, is a strong base that dissociates in water to form sodium ions (Na+) and hydroxide ions (OH-).

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Answer:

10 cm (Approx)

Explanation:

Given:

8.20 cm + 2 cm

Find:

Round of the following number

Computation:

⇒ 8.20 cm + 2 cm

⇒ 10.20 cm

We know that 0.20 < 0.50

So,

⇒ 10.20 cm = 10 cm (Approx)

Answer:it has eleven electrons

Explanation:

Answer:

Pour the mixture through a filter to separate the sand, then evaporate the liquid to separate the salt.

Explanation:

There are various methods used to separate single substances from a mixture. The method adopted depends upon the type of mixture and the ingredients used in it. According to the given question, the mixture comprises of sand, salt and water. Here, the first process will be the process of filtration. Through filtration, the salt-water solution and sand can be separated. Salt-water solution can be separated by the process of evaporation in which sat and water will be separated individually.

the pH of the aqueous solution is 8.51 with a hydrogen ion concentration of [H+]=3.1×\(10^-9\)M

The pH of the aqueous solution can be calculated using the formula:

pH = -log[H+]

where [H+] is the hydrogen ion concentration of the solution.

Substituting the given value, we get:

pH = -log(3.1×\(10^-9\))

pH = 8.51

An aqueous solution is one in which water serves as the solvent. It is utilised in a variety of applications, including analytical chemistry, biochemistry, and industrial chemistry. It is the most prevalent kind of solution used in chemical reactions. Water serves as both the solvent and the solute in an aqueous solution, where the solute is often a solid, liquid, or gas. Due to its high polarity and capacity to make hydrogen bonds with other molecules, water is an excellent solvent that can dissolve a variety of materials, including polar molecules and ionic compounds. Acid-base reactions, redox reactions, and precipitation reactions are just a few of the numerous chemical processes that take place in aqueous solutions. A variety of variables can have an impact on an aqueous solution's characteristics.

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Answer:

This is because, the is less chance of trapping impurities in the developing crystal lattice

Answer:

injuries

Explanation:

bc it will burn your hands

Answer:

Maximum pressure P = 4.9 × 10⁻⁵ Pa

Explanation:

From the information given, the mean free path can be expressed with the formula:

\(\lambda = \dfrac{RT}{\sqrt{2} \pi \times d^2 \times N_A \times P}\)

Making Pressure P the subject of the formula because we intend to find the maximum pressure, we have:

\(P= \dfrac{RT}{\sqrt{2} \pi \times d^2 \times N_A \times \lambda }\)

At standard conditions

R = gas constant = 8.314 J/mol.K

T = temperature at 25°C = (273 + 25) = 298 K

π = pi = 3.14

d = (364× 10⁻¹²m)²

\(N_A\) = avogadro's number = 6.023 × 10²³

λ = mean free path = 1.0 m

\(P= \dfrac{RT}{\sqrt{2} \pi \times d^2 \times N_A \times \lambda }\)

\(P= \dfrac{8.314 \ J/mol.K \times 298 \ K}{\sqrt{2}\times (3.14) \times (364 \times 10^{-12} \ m) ^2 \times 6.023 \times 10^{23}/mol \times 1.0 \ m }\)

P = 0.007 kg/m.s²

P = 0.007 Pa

\(P = 0.007 Pa \times \dfrac{0.007 \ torr}{1 \ Pa}\)

P = 4.9 × 10⁻⁵ Pa

Answer:

b.) Put on protective gloves

Answer:

2020 Put on protective gloves.

Explanation:

Answer:

Strike-Slip Fault

Explanation:

The scientist observes strike slip fault feature when rock masses that have moved past each other in opposite horizontal directions.

The feature that the scientist observes when rock masses move past each other in opposite horizontal directions is a strike-slip fault.

A strike-slip fault is a type of fault in which two rock masses slide past each other horizontally in opposite directions. This type of fault is caused by shearing forces, which cause the rock masses to move sideways against each other.

As a result, the rocks on either side of the fault can move in different directions, creating an offset in the landscape. Strike-slip faults can occur in various settings, including transform plate boundaries, where two tectonic plates slide past each other, and in areas of high seismic activity, where the Earth's crust is under a lot of stress.

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