cellular respiration uses glucose and oxygen to make ​

Answer: 22.3 *10^23 S atoms

Explanation:

The final concentration of I ions in the resulting solution is approximately 0.0311 M, expressed with three significant figures.

To determine the final concentration of I ions in the resulting solution, we need to consider the stoichiometry and volumes of the solutions being mixed.Given:

Volume of NH4l solution = 129.13 mL

Concentration of NH4l solution = 112.9 mM = 0.1129 M (converting from millimolar to molar)

Volume of Mgl2 solution = 105.31 mL

Concentration of Mgl2 solution = 0.87 M

First, we need to determine the moles of NH4l and Mgl2 in their respective solutions:

Moles of NH4l = Volume of NH4l solution * Concentration of NH4l solution

Moles of NH4l = 0.12913 L * 0.1129 M = 0.01459 moles NH4l

Moles of Mgl2 = Volume of Mgl2 solution * Concentration of Mgl2 solution

Moles of Mgl2 = 0.10531 L * 0.87 M = 0.09157 moles Mgl2

Next, we determine the limiting reagent, which is the reactant that is completely consumed and determines the maximum amount of product formed. In this case, the limiting reagent is NH4l because it has fewer moles than Mgl2.

The balanced chemical equation for the reaction between NH4l and Mgl2 is:

2 NH4l + Mgl2 → 2 NH4+ + MgI2

From the balanced equation, we can see that for every 2 moles of NH4l, we get 1 mole of MgI2.

Since the moles of NH4l is the limiting reagent, it will be completely consumed, and the moles of MgI2 formed will be half of the moles of NH4l.

Moles of MgI2 = 0.01459 moles NH4l * (1 mole MgI2 / 2 moles NH4l) = 0.007295 moles MgI2

Finally, we calculate the final concentration of I ions in the resulting solution:

Volume of resulting solution = Volume of NH4l solution + Volume of Mgl2 solution

Volume of resulting solution = 0.12913 L + 0.10531 L = 0.23444 L

Final concentration of I ions = Moles of MgI2 / Volume of resulting solution

Final concentration of I ions = 0.007295 moles / 0.23444 L = 0.0311 M

Therefore, the final concentration of I ions in the resulting solution is approximately 0.0311 M, expressed with three significant figures.

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The volume of an object that floats on the water can be found by making it sink forcefully. For this the object is tied to another object that can easily sink. The floating object will sink in the water and its volume can be determined.

Volume is a measure of three-dimensional space. It is often quantified numerically using SI derived units or by various imperial or US customary units . The definition of length (cubed) is interrelated with volume. The volume of a container is generally understood to be the capacity of the container; i.e., the amount of fluid (gas or liquid) that the container could hold, rather than the amount of space the container itself displaces.

In ancient times, volume is measured using similar-shaped natural containers and later on, standardized containers. Some simple three-dimensional shapes can have their volume easily calculated using arithmetic formulas. Volumes of more complicated shapes can be calculated with integral calculus if a formula exists for the shape's boundary. Zero-, one- and two-dimensional objects have no volume; in fourth and higher dimensions, an analogous concept to the normal volume is the hypervolume.

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The highest electric force exerted by charges -4 ×10⁻⁵ C and 3 ×10⁻⁵ C  placed 0.5 m apart is equal to 43.15 N.

The lowest electric force exerted by charges 3 ×10⁻⁵ C and 3 ×10⁻⁵ C  placed 1 m apart is equal to 8.10 N.

According to Coulomb’s law, the force of attraction between two charges is equal to the product of their charges and is inversely proportional to the square of the distance. This electric force applies along the line joining the two charges.

The magnitude of the electric force can be written as follows:

\(\displaystyle F = k\frac{q_1q_2}{r^2}\)

where k is constant proportionality = 8.99 × 10⁹ N.m²/C².

Given the charge on one point charge, q₁ =  4 ×10⁻⁵ C

The charge on the other point charge, q₂ = - 3 × 10⁻⁵C

The distance between these two charges, r = 0.5 m

The magnitude of electric force between the charges  will be:

\(\displaystyle F = 8.99\times 10^{9}\times \frac{4\times 10^{-5}\times 3\times 10^{-5}}{(0.5)^2}\)

F = 43.15 N

Given the charge on one point charge, q₁ =  3 ×10⁻⁵ C

The charge on the other point charge, q₂ = 3 × 10⁻⁵C

The distance between these two charges, r = 1 m

The magnitude of force between the charges will be:

\(\displaystyle F = 8.99\times 10^{9}\times \frac{3\times 10^{-5}\times 3\times 10^{-5}}{(1)^2}\)

F = 8.1 N

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Answer: The quantity of heat required is 358.644 J.

Explanation:

Given: Specific heat capacity = \(4.18 J/g^{o}C\)

Mass = 1.50 g

\(T_{1} = 26.5^{o}C\)

\(T_{2} = 83.7^{o}C\)

Formula used to calculate heat energy is as follows.

\(q = m \times C \times (T_{2} - T_{1})\)

where,

q = heat energy

m = mass

C = specific heat capacity

\(T_{1}\) = initial temperature

\(T_{2}\) = final temperature

Substitute the values into above formula as follows.

\(q = m \times C \times (T_{2} - T_{1})\\= 1.50 \times 4.18 J/g^{o}C \times (83.7 - 26.5)^{o}C\\= 358.644 J\)

Thus, we can conclude that quantity of heat required is 358.644 J.

Review and analyze the data recorded during the experiment to draw conclusions and better understand the types of  physical and  chemical changes that occurred.

Step 1: Organize your data in a table format in your lab notebook or the space provided.
Step 2: Record the initial material, Calcium carbonate.
Step 3: When Calcium carbonate reacts with hydrochloric acid, the changes observed would be the formation of bubbles and fizzing. This is a chemical change due to the formation of a new substance, calcium chloride, and the release of carbon dioxide gas.
Step 4: For water, there is no reaction observed. This step represents a physical change, as water does not alter the chemical composition of the other materials.
Step 5: When Copper sulfate pentahydrate is added to water, the change observed is the dissolution of the solid into the water, forming a blue solution. This is a physical change because the chemical composition of the copper sulfate remains the same.
Step 6: When Iron filings and sulfur are mixed together, no observable change occurs. This is a physical change since the individual substances are not chemically reacting.
Step 7: When Lead nitrate reacts with potassium iodide, a yellow precipitate (Lead iodide) forms. This is a chemical change due to the formation of new substances.
Step 8: When Magnesium reacts with hydrochloric acid, the change observed is the formation of bubbles and the disappearance of the magnesium. This is a chemical change due to the formation of magnesium chloride and the release of hydrogen gas.
Step 9: When a candle is burned, the change observed is the flame and the production of heat and light. This is a chemical change as new substances are formed, such as carbon dioxide and water vapor.
Remember to review and analyze the data recorded during the experiment to draw conclusions and better understand the types of changes (physical or chemical) that occurred.

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Answer:

4 millllllermeeters jb

Answer:

a. the width of region 2 would be smaller

If the same reaction was shown without a catalyst, the height of region 2 would be larger, so the correct option is (C).

A catalyst is a substance that speeds up the rate of a chemical reaction without being consumed in the process. It works by providing an alternate pathway for the reaction with a lower activation energy, making it easier for the reactants to transform into products.

Catalysts can be solids, liquids, or gases, and they can be homogeneous or heterogeneous, depending on whether they are in the same phase as the reactants or in a different phase.

Catalysts are widely used in many industrial processes, such as the production of fertilizers, plastics, and fuels, to increase the efficiency and reduce the cost of the reaction. They can also be found in biological systems, where they play a crucial role in metabolic processes, such as the breakdown of food in the digestive system or the conversion of light into chemical energy in photosynthesis.

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The relative molecular mass of hydrated Copper (II) tetraoxosulphate (VI) CuSO4.5H₂O is 249.

Molecular mass is a measure of the total mass of one mole of a substance, which is defined as the mass of the substance divided by the number of molecules it contains. It is typically expressed in g/mol and is also known as molar mass. Molecular mass is determined by the types and number of atoms that compose a molecule, and is an important factor in understanding the properties of a substance.

This is calculated by adding the atomic masses of all the atoms present in the compound.
The atomic mass of copper is 64, sulphur is 32, oxygen is 16, and hydrogen is 1.
So, the relative molecular mass of hydrated Copper (II) tetraoxosulphate (VI) CuSO4.5H₂O is 64 + 32 + (16*4.5) + (1*5) = 249.

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4.29 g, or % of the reaction's yield. Yield in synthesis reaction percent: 85%. Explanation: C2H5OH+3O22CO2+3H2O is the balanced equation.

Multiply the molal mass of water by the number of moles. 2 + 16 = 18 g/mol is the molar mass. This yields 0.834 moles H2O x 18 g/mol when multiplied by the end result. 15 grams of water equal one gram of H2. For this experiment, 15 grams of water should be produced theoretically.

The percentage and theoretical yield are multiplied together to arrive at the simple calculation for actual yield.

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It is false because NaCl has a higher bond energy than Nal.

The melting point of a substance is determined by the strength of the intermolecular forces between its atoms or ions. In the case of NaCl, the strong electrostatic attraction between the positively charged Na+ ions and the negatively charged Cl- ions results in a relatively high melting point.

In contrast, NaI is a ionic compound with a lower bond energy between the atoms. So, it has lower melting point in comparision to NaCl. So the statement is False, NaCl has a higher melting point than NaI.

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Answer:

i really don't know

Explanation:

lol

Answer:

adding a catalyst will increase the reaction rate.

Explanation:

im like 95% sure thats right.

Answer:

A. C. D

Explanation:

ap ex

There are approximately 6.022 × 10^23 atoms in 12 grams of Carbon-12 (12C).

The number of atoms in a given amount of a substance can be calculated using Avogadro's number, which represents the number of atoms or molecules in one mole of a substance. Avogadro's number is approximately 6.022 × 10^23.

Carbon-12 is a specific isotope of carbon, with an atomic mass of 12 atomic mass units (amu). One mole of Carbon-12 has a mass of 12 grams. Since one mole of any substance contains Avogadro's number of particles, in the case of Carbon-12, it contains 6.022 × 10^23 atoms.

Therefore, if we have 12 grams of Carbon-12, which is equal to one mole, we can conclude that there are approximately 6.022 × 10^23 atoms in this amount of Carbon-12.

In summary, 12 grams of Carbon-12 contains approximately 6.022 × 10^23 atoms. Avogadro's number allows us to relate the mass of a substance to the number of atoms or molecules it contains, providing a fundamental concept in chemistry and enabling us to quantify and understand the microscopic world of atoms and molecules.

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Answer:

B I think I am pretty sure

Answer:  molecular weight of CUSO4 or grams. The SI base unit for amount of substance is the mole. 1 mole is equal to 1 moles CUSO4, or 346.10221 grams. Note that rounding errors may occur, so always check the results.

Explanation:

Answer: the best option to answer the question is the second one (letter B).

Explanation:

The question requires us to choose, among the options given, which one best corresponds to the correct form of disposal fo high-level nuclear waste.

High-level nuclear waste corresponds mainly to highly radioactive materials produced as byproducts of reactions that occur inside nuclear reactors. When they are not of use anymore, they are disposed in underground repositories, without any recycling. The place of disposal of this type of nuclear waste is usually placed in cannister which are placed underground and sealed with rocks. Since the time of decay of high-level nuclear waste can reach hundreds of thousands of years, this type of waste must be disposed of in a way that provides adequate protection for a long time.

Considering the information above, we can say that the best option to answer the question is the second one (letter B).

The heat absorbed by the engine block when its temperature is raised from 20°C to 90°C is 665,640 J.

To calculate the heat absorbed by the engine block, we can use the equation:

Q = mcΔT

where Q is the heat absorbed, m is the mass of the engine block, c is the specific heat capacity of steel, and ΔT is the change in temperature.

First, we need to calculate the specific heat capacity of steel. The specific heat capacity of steel is typically around 0.45 J/g°C.

Using this value and the given values of mass and temperature change, we can calculate the heat absorbed by the engine block as follows:

Q = (21080 g) x (0.45 J/g°C) x (90°C - 20°C)

Q = 21080 g x 0.45 J/g°C x 70°C

Q = 665,640 J

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Answer :]

This is an oxidation-reduction (redox) reaction:

S0 + 2 e- → S-II (reduction)

2 K0 - 2 e- → 2 KI (oxidation)

S is an oxidizing agent, K is a reducing agent.

Answer:

K

Explanation:

Here, in this reaction 2 moles of potassium react with 1 mole of sulfur to form 1 mole of potassium sulfide.

Let's compare the electronic configurations of both elements :

⇒ K = {2, 8, 8, 1}

⇒ K can attain noble gas configuration by losing one electron

⇒ K exists as : K⁺

⇒ S = {2, 8, 6}

⇒ S can attain noble gas configuration by the addition of 2 electrons

⇒ S exists as S²⁻

Now, we know that will lose protons when oxidized. Hence, here the substance which is oxidized is K

Answer:

It is a strong oxidizing agent and dissolves in water to give chloric( I) acid. Red-yellow gas. Very reactive and unstable.

Explanation:

Dichlorine monoxide is formed by passing chlorine diluted with an inert gas over the surface of a slowly stirred 50% NaOH solution at about 5 °C. Dichlorine oxide gas is not used directly because of a tendency to explode when heated or sparked.

Answer:

b. Electronegativity

Explanation:

electronic configuration

Answer:

21.2 years

Explanation:

If half life is 5.3 years, that means activity will be 50% every 5.3 years.

12,400 x 50% = 6,200

6,200 x 50% = 3,100

3,100 x 50% = 1,550

1,550 x 50% = 775

4 half lives, so 4 half lives x 5.3 years/half life = 21.2 years

The elements that make up organisms, such as carbon, nitrogen, hydrogen, sulphur, and others, are recycled through biotic and abiotic processes known as biogeochemical cycles.

Chlorine, Ammonia, Hydrogen, Nitrogen and Sulfur oxides.

Organic substances are first assimilated into the body of living things from nonliving reserves. Element transfer occurs between species that ingest them and the organisms that initially take them into their bodies. This keeps happening until they finish the cycle and decompose to return to the nonliving realm. As a result, matter goes through cycles. The cycling of water in the atmosphere is exemplified by the hydrological cycle, which is a key example.

5 gases that are found in the home are as follow,

carbon monoxide

1.Chlorine

2.Ammonia

3.Hydrogen

4.Nitrogen

5.Sulfur oxides

LPG, or liquefied petroleum gas, is the most widely used fuel for heating. It either comprises butane, propane, or a combination of the two gases.

10 example of gas are as follow,

Helium

Argon

Neon

Krypton

Radon

Xenon

Nitrogen

Hydrogen

Chlorine

Fluorine

Oxygen

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Answer:The law of conservation of energy

Explanation:

states that the total energy is constant in any process. Energy may change in form or be transferred from one system to another, but the total remains the same.

ANSWER

Option C

EXPLANATION

The collision between particles of substance increases with an increase in the temperature.

Recall, that matter exists in three states which are;

solid

liquid

gas

The particles will move faster is gas because the intermolecular force binding the particles together is very weak and therefore, the collision between the particles are very fast

Therefore, the particles of steam at 110 degrees Celcius will move faster

Option C is correct

The answer is 42,100.

Answer: 7.71 + 4.31 + 1.7 + 4.00141= 17.72141

7.71 x 4.31 x 1.7 x 4.00141=  226.04433255

Explanation:

(i) 7.71 + 4.31 + 1.7 + 4.00141

= 7.71000+4.31000+1.70000+ 4.00141   [make like decimals]

= 17.72141    [By adding the corresponding places ]

(ii)  7.71 x 4.31 x 1.7 x 4.00141 =( 7.71 x 4.31) x 1.7 x 4.00141

= 33.2301 x 1.7 x 4.00141

= (33.2301 x 1.7) x 4.00141

=  56.49117 x 4.00141

= ( 56.49117 x 4.00141 )

=  226.04433255

Hence,  7.71 + 4.31 + 1.7 + 4.00141= 17.72141

7.71 x 4.31 x 1.7 x 4.00141=  226.04433255