If 20 g of lithium is reacted with 98 g of H2SO4 how much hydrogen gas will be produced?

Answer:

A physical property is a characteristic of a substance that can be observed or measured without changing the identity of the substance. Physical properties include color, density, hardness, and melting and boiling points. A chemical property describes the ability of a substance to undergo a specific chemical change.

I hope this helps you understand! <3

The age of a piece of cotton cloth when the carbon-14 composition of the cloth is 22 percent that of living plants is D) 12,517 years.

To determine the age of the cotton cloth, you can use the half-life formula for carbon-14 dating. Since the cloth has 22% of the carbon-14 composition of living plants, it has gone through multiple half-lives. To calculate the number of half-lives (n), you can use the formula:

Final amount = Initial amount * (1/2)^n

In this case, the final amount is 22% (0.22) and the initial amount is 100% (1). Rearranging the formula to find n:

n = log(0.22) / log(0.5)

n ≈ 2.18 half-lives

Now, use the half-life of carbon-14 (5,730 years) to find the age of the cloth:

Age = n * half-life

Age = 2.18 * 5,730 years ≈ 12,517 years

So, the cotton cloth is approximately 12,517 years old (Option D).

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Answer:

I'm not 100% sure but I believe it is the first or last

there should be three y's and one x but I can't remember the order. my gut goes with the top one

Option A,  Ninhydrin is a chemical that is used to detect the presence of amino acids in a sample. It reacts with the amino acids in a sample, such as skin, to form a complex that is blue in color.

Ninhydrin is a chemical that is used to detect the presence of amino acids in a sample. It reacts with the amino acids in a sample, such as skin, to form a complex that is blue in color. This is because when Ninhydrin reacts with an amino acid it forms a complex with the nitrogen in the amino group, and this complex is blue in color. It is also commonly used in forensic science to detect fingerprints, as fingerprints contain amino acids from the oils and sweat on the skin. The blue coloration of the skin is an indication of the presence of amino acids, which are found in many biological molecules such as proteins and enzymes.

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Answer:

Low pressure ; stormy

Explanation:

The mass of AI needed to react with 72 g of HCI is 54 g.

To determine the mass of AI needed to react with 72 g of HCI, we can use the stoichiometry of the balanced chemical equation you provided:

2AI + 6HCI --> 2AICI3 + 3H

From the equation, we can see that 2 moles of AI react with 6 moles of HCI to produce 2 moles of AICI3.

This means that the mole ratio between AI and HCI is 2:6 or 1:3.

Given the molar mass of HCI is 36 g/mol, we can calculate the number of moles of HCI in 72 g of HCI by dividing 72 g by the molar mass of HCI:

Number of moles of HCI = mass of HCI / molar mass of HCI

Number of moles of HCI = 72 g / 36 g/mol

Number of moles of HCI = 2 moles

Since the mole ratio between AI and HCI is 1:3, the number of moles of AI needed to react with 2 moles of HCI is also 2 moles.

Now, we can use the molar mass of AI, which is 27 g/mol, to calculate the mass of AI needed to react with 2 moles of HCI:

Mass of AI = number of moles of AI × molar mass of AI

Mass of AI = 2 moles × 27 g/mol

Mass of AI = 54 g

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The Omnipotent view of management refers to the belief that managers are directly responsible for an organization's success or failure. According to this view, managers have the power and control to make decisions that will significantly impact the organization's performance.

In terms of the organizational environment, ABC CO needs to focus on several aspects. Firstly, it should prioritize building strong relationships with customers by understanding their needs and delivering value through its products or services. Secondly, maintaining good relationships with suppliers is crucial to ensure a reliable supply chain and access to necessary resources. Thirdly, keeping a close eye on competitors is essential to stay competitive and identify opportunities for differentiation. Lastly, monitoring and adapting to economic, legal, and socio-cultural factors is vital to ensure compliance with regulations and aligning the organization with societal trends and expectations.

In conclusion, the Omnipotent view of management emphasizes the influence of managers in shaping organizational outcomes, while the Symbolic view recognizes the significance of external factors. For the current state of ABC CO, a balanced approach that considers both internal and external factors would be beneficial. The culture should promote collaboration, innovation, and adaptability, while the organization should focus on building strong relationships with customers, suppliers, and competitors while adapting to the economic, legal, and socio-cultural environment.

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Answer:

Explanation:

Increasing the temperature increases reaction rates because of the disproportionately large increase in the number of high energy collisions.

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By increasing its automation for the Cozy product, the Chester company's investment in automation will increase by $21,600,000.

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Answer:

b.2

Explanation:

Answer:

Mole fraction of water(H₂O) is 0.5 and the mole fraction of CH₃OH(Methanol) is 0.5.

Explanation:

Greetings !

The molecular weight of CH₃OH(Methanol)=32g/mol

The number of moles of CH₃OH=

\( \frac{128g}{32g/mol} \)

=4moles

The molecular weight of water H₂O =18g/mol

The number of moles of=

\( \frac{72g}{18g/mol} \)

=4moles

Total number of moles in the solution =4mol + 4mol

=8mol

Mole fraction Methanol CH₃OH=

\( \frac{4mol}{8mol} \)

=0.5mol

Hope it helps!

When basket ball is dropped from a height, its potential energy decreases and its kinetic energy increases till it reaches the ground. The highest kinetic energy is at ground level.

The energy that an object has as a result of motion is known as kinetic energy. It is described as the effort required to move a mass-determined body from rest to the indicated velocity. The body holds onto the kinetic energy it acquired during its acceleration until its speed changes.

A ball drops from the top of a building and picks up speed as it descends. Its speed is increasing by 10 m/s every second. What we refer to as motion with constant acceleration is, for example, a ball falling due to gravity.

Thus, The highest kinetic energy is at ground level.

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Answer:

Hydrogen has 0 neutrons.

Explanation:

You can find the # of neutrons by subtracting the Atomic Mass from the Atomic number. Hydrogen is a special case in which the atom has no neutrons.

Answer:

see the pic for more detail

Answer:

heat energy to keep you warm and light energy to be able to read your book

Explanation:

The amount of copper obtained by the reaction depends on the amount of copper chloride reacted and the limiting reagent in the reaction.

Without information on the amounts of reactants used, it is not possible to calculate the amount of copper obtained by the reaction or compare it to the expected amount. However, if the reaction was carried out under controlled conditions and all reactants were used in the stoichiometric ratio, the amount of copper obtained should be the expected amount calculated based on the balanced chemical equation.

In order to calculate the expected amount of copper obtained, the amount of copper chloride reacted should be known, and the limiting reagent should be identified. The amount of copper obtained will be determined by the limiting reagent.

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The complete question is:

Calculate the amount of copper obtained by the reaction. Was it the amount you expected? Explain. ​

3CuCl2(aq) +2 Al (s) ----> 2AlCl3(aq) + 3Cu(s)

The statement that best describes the cell condition supporting Na+ sequestration in the vacuole is option B: Na+ sequestration can occur if the concentration of protons (H+) in the cytoplasm is less than the concentration of protons (H+) in the vacuole.

Option B accurately describes the condition that enables Na+ sequestration in the vacuole. In plant cells, the vacuole plays a crucial role in ion homeostasis by actively transporting ions such as Na+ into its lumen, maintaining a lower concentration of Na+ in the cytoplasm compared to the vacuole.

This sequestration process relies on proton pumps present in the vacuolar membrane, which actively transport protons (H+) from the cytoplasm into the vacuole, creating an electrochemical gradient. The higher concentration of protons (H+) in the vacuole creates an electrochemical potential that facilitates the uptake of Na+ ions.

By maintaining a lower concentration of protons (H+) in the cytoplasm relative to the vacuole, the cell can drive Na+ ions into the vacuole against their concentration gradient, effectively sequestering them and preventing their accumulation in the cytoplasm.

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Consequently, each C-H bond in methane can be understood as the overlap of a half-filled 1s orbital in four hydrogen atoms with the bigger lobe of one of the four half-filled sp3 hybrid orbitals to generate a four equivalent sigma () bond.

By combining one orbital with three p orbitals, methane molecules hybridize. One unpaired electron can be found in each orbital.

Four covalent connections between the carbon and hydrogen atoms make up the methane molecule. Due to the presence of bonds on the core atom's four sides, the arrangement of the molecule exhibits a fair amount of symmetry.

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Answer:

I think the answer is B

Explanation:

mark me brainiest if I am right

Answer:

Here the force is 10N and the mass is 5 kg. Dividing both sides by 5kg, we get a = 2 m/s^2.

Answer:

10. methanol would be more.

11. methanol would be more.

12. methanol would remain the same.

13. CO would be less.

Explanation:

10. Methanol increases because the forward reaction is favoured with increase in temperature and thus it is endothermic.

11. Methanol increases because the forward reaction is favoured with decrease in volume thus increasing pressure decreases the volume of the vessel.

12.Methanol remains the same because the hydrogen added is its raw material but the CO is acting as a limiting reactant for the formation of methanol.

13. Carbon monoxide becomes less because it will rapidly combine with hydrogen added to form methanol and then later be a limiting reactant when hydrogen is still present

Answer:

beryllium has a higher ionization energy because its radius is smaller. boron has a higher ionization energy because its radius is smaller.

The formation of Zinc sulfide from 'Zn' and 'S' is a redox reaction, because it involves both oxidation and reduction reactions. So zinc bonds with sulfur to form zinc sulfide.

The zinc sulfide also called the zincblende is a white or yellowish crystal and it is insoluble in water as well as denser than water. It is manufactured by the combustion of a mixture of zinc and sulfur.

The compound 'ZnS' decomposes in the presence of oxidizing agents and acids. The reaction is given as:

Zn + S → ZnS

The oxidation reaction is:

Zn - 2e⁻ → Zn²⁺

The reduction reaction is:

S + 2e⁻  → S⁻²

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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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Wine was produced 37 years ago (1984 as usual year 15,2021) that is shown in the calculations below.

Reaction rate is calculated using the formula rate = Δ[C]/Δt, where Δ[C] is the change in product concentration during time period Δt. The rate of reaction can be observed by watching the disappearance of a reactant or the appearance of a product over time.

The time can be represented as follows:

t= 2.303\∧ log A0/A

∧= 0.693/t 1/2

The rate of a reaction is proportional to the reciprocal of the time taken. Rate α 1 time Rate is inversely proportional to time. Units: s-1, min-1 etc.

The given parameters are as follows:

t1/2=12.3

A0=5.5

A=0.688

t= 2.303/(0.693/12.3) log (5.5/0.688)

t=36.9

t=37 years

Thus, wine was produced 37 years ago (1984 as usual year 15,2021)

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Answer:

Antacids are medicines that counteract (neutralise) the acid in your stomach to relieve indigestion and heartburn. They come as a liquid or chewable tablets and can be bought from pharmacies and shops without a prescription.

24 moles of \(PbCl_2\) are created when 16 moles of \(AlCl_3\) are used up.

According to the balanced chemical equation, 2 moles of \(AlCl_3\) are required to produce 3 moles of \(PbCl_2\). Therefore, if 16 moles of \(AlCl_3\) are consumed, the amount of \(PbCl_2\) produced would be:
(16 mol \(AlCl_3\)) x (3 mol \(PbCl_2\) / 2 mol \(AlCl_3\)) = 24 mol \(PbCl_2\)

Therefore, 24 moles of \(PbCl_2\) are produced when 16 moles of \(AlCl_3\) are consumed.
Using the balanced chemical equation, we can determine the amount of \(PbCl_2\) produced when 16 moles of \(AlCl_3\) are consumed:

3Pb(NO3)2 + 2 \(AlCl_3\) → 3PbCl2 + 2Al(NO3)3

From the equation, we see that 2 moles of AlCl3 produce 3 moles of \(PbCl_2\). To find the amount of \(PbCl_2\) produced by 16 moles of \(AlCl_3\), set up a proportion:

(3 moles \(PbCl_2\)) / (2 moles \(AlCl_3\)) = (x moles \(PbCl_2\)) / (16 moles \(AlCl_3\))
Cross-multiply and solve for x:

(3 moles \(PbCl_2\))(16 moles \(AlCl_3\)) = (2 moles \(AlCl_3\))(x moles \(PbCl_2\))
48 moles \(PbCl_2\) = 32 moles \(AlCl_3\) = 24 moles PbCl2
So, when 16 moles of \(AlCl_3\) are consumed, 24 moles of \(PbCl_2\) are produced.

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Answer:

0.33 mL

Explanation:

Use the density formula, D = \(\frac{m}{v}\), where m is the mass and v is the volume.

Plug in what we know and solve for v:

15 = \(\frac{5}{v}\)

15v = 5

v = 0.33

= 0.33 mL

Answer:

d≈0.33 mL

Explanation:

Volume can be found by dividing the mass by the density.

v= m/d

The mass is 5 grams and the density is 15 grams per milliliter. Therefore,

m= 5 g

d= 15 g/mL

Substitute the values into the formula.

v= 5g / 15 g/mL

Divide 5 g by 15 g/mL. When you divide, the grams (g) in the numerator and denominator will cancel each other out.

d= 0.333333333 mL

Let's approximate our answer and round to the nearest hundredth. The 3 in the thousandth place tells us to leave the 3 in the hundredth place.

d≈ 0.33 mL

The density is approximately 0.33 milliliters.

Answer:

atmosphere

Explanation:

atmosphere is composed of all air particles surrounding the Earth

biosphere is composed of all living organisms on the Earth

hydrosphere is composed of all water particles in the Earth

I guess geosphere is all about rocks and soils