TRUE OR FALSE yeast cells, saccharomyces cerevisiae, were incubated with and without glucose at three different temperatures for a period of four minutes, during which the rate of co production was measured with a co sensor.

Answer:

I think it is copper

Explanation:

.........................

Answer:

copper

Explanation:

Answer:

Explanation:

The most highly stable cycloalkane is cyclohexane. It does not suffer from an angle or torsional strain, and it has the appropriate stability as chain alkanes. Because of the peculiar conformation it takes, this stability leads to the cyclohexane conformation popularly known as the "chair" conformation.

However, from the information given;

The chair conformation structure of  trans-1-bromo-3-methylcyclohexane is carefully drawn and the substituents are appropriately attached in the image below.

Mass of MgO = 28.35grams

Mass of Sulphur = 11.29 grams

The balanced chemical equation between magnesium metal and sulphur dioxide is given as:

Determine the moles of magnesium

Mole = mass/molar mass

Mole of Mg = 17.1/24.305

mole of Mg = 0.704moles

According to stoichiometry, 2 moles of Mg produces 2 moles of MgO, hence the required mass of MgO will be:

Similarly, 2moles of Mg produces 1 mole of sulphur, hence the mass of sulphur produced is;

Hence the mass of magnesium oxide and the mass of sulphur that forms is 28.35grams and 11.29grams

Answer:

down below

Explanation:

The police's influence can happen based on a response to a problem. An example is when the police are called because of a thief child. If the police handles the situation correctly-using reasonable force, if necessary, and reading them their rights- the public will perceive the police in a good light or way. If the police use gross misconduct and do not go by the book, then they will be perceived as an enemy or in a bad light or way.

The volume of NaOH the student will need to reach the final equivalence point = 12.8ml

The balanced equation shows the reaction between phosphoric acid and sodium hydroxide.

3NaOH + H3PO4 ====> Na3PO4 + + 3H2O

This equation implies that for 1 mole (or 1n) of phosphoric acid, 3 moles of NaOH will be required.

nNaOH = 3 x nH3PO4

MV (NaOH) = 3 x mass of H3PO4

 molar mass

Now let's do the calculations to find the volume of NaOH to find the equivalence point. As we know the molar mass of phosphoric acid is 97.994 g/mol.

V (NaOH) = 3 x mass of H3PO4

 molar mass x M (NaOH)

 = 3 x 0.0838

 97.994 x 0.2000

V (NaOH) = 12.8x 10-³L x 1000ml/ 1L

The volume of NaOH = 12.8ml

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dolphin and whales use echolocation

The amount of heat energy produced when 1 g of hydrogen and 2 g of nitrogen are reacted, is -6.61 KJ

First, we shall obtain the limiting reactant. Details below:

3H₂ + N₂ -> 2NH₃

From the balanced equation above,

28 g of N₂ reacted with 6 g of H₂

Therefore,

2 g of N₂ will react with = (2 × 6) / 28 = 0.43 g of H₂

We can see that only 0.43 g of H₂ is needed in the reaction.

Thus, the limiting reactant is N₂

Finally, we the amount of heat energy produced. Details below:

3H₂ + N₂ -> 2NH₃ ΔH = -92.6 KJ

From the balanced equation above,

When 28 grams of N₂ reacted, -92.6 KJ of heat energy were produced.

Therefore,

When 2 grams of N₂ will react to produce = (2 × -92.6) / 28 = -6.61 KJ

Thus the heat energy produced from the reaction is -6.61 KJ

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Answer:

Because burning copper in air won't oxidize it you need to leave it in contact with air only

Explanation:

Answer:

B. Tell the instructor

Explanation:

Always to the instructor about any accidents happens in a lab.

Answer:

B

Explanation:

Just helping out:)

Answer:

C, C, A

Explanation:

11.  C

12.  C

13.  A

This extremely high temperature indicates that under normal conditions, you do not need to worry about your car tire bursting from overheating as it is unlikely to reach such extreme temperatures.

To determine the temperature at which the tire will burst, we can use the ideal gas law equation:

PV = nRT

Where P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant, and T is the temperature in Kelvin.

Rearranging the equation to solve for temperature, we have:

T = PV / (nR)

Given that the pressure threshold for bursting is 1.4 x 10^3 kPa, the volume is 30 L, and the number of moles of air is 2.5 mol, we can substitute these values along with the ideal gas constant R = 8.314 J/(mol K) into the equation.

T = (1.4 x 10^3 kPa) * (30 L) / (2.5 mol * 8.314 J/(mol K))

Converting kPa to Pa and L to m^3, and simplifying the equation, we find:

T ≈ 20,993 K

This extremely high temperature indicates that under normal conditions, you do not need to worry about your car tire bursting from overheating as it is unlikely to reach such extreme temperatures.

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Complete Question

The complete question is shown on the first uploaded image

Answer:

The step wise mechanism  is shown on the second uploaded image

Explanation:

Answer:

C

Explanation:

Answer:

4. Transfer of heat through the movement of particles

Explanation:

because it goes in a circular motion

Answer:

Oxygen present in food items makes then rancid due to the presence of oils and fats. If the food is flushed with nitrogen, it prevents it from being oxidised (the nitrogen acts as an antioxidant).

Hope it helps ! :)

The balanced chemical equation is the representation of the elements with the same proportion of elements on both sides. The balanced equation is, 2CH₃(CH₂)₄CH₃ + 19O₂ → 12CO₂ + 14H₂O.

An equation is said to be balanced if the number of atoms of the element on the right side is the same as that of the left side of the reaction.

CH₃(CH₂)₄ CH₃(g) + O₂(g) → CO₂(g) + H₂O(g)

Here the number of carbon, hydrogen, and oxygen are unbalanced.

Coefficients are added before carbon, oxygen, and a hydrogen atom. First, 2 is added before the carbon on the reactant side and 12 at the carbon of the product side.

After this, the number of hydrogen is balanced by adding 14 on the product side followed by adding 19 on the oxygen of the reactant side.

The balanced equation: 2CH₃(CH₂)₄CH₃ + 19O₂ → 12CO₂ + 14H₂O

Therefore, 2CH₃(CH₂)₄CH₃ + 19O₂ → 12CO₂ + 14H₂O is the balanced equation.

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Sally is wrong because copper is less electropositive than hydrogen, thus, can not displace hydrogen from dilute acids.

The reactions to prepare copper (ii) chloride are:

the chlo­ri­na­tion of cop­per sul­fide at a high tem­per­a­ture

reaction of copper (ii) oxide with dilute hydrochloric acid

The equations of the given reactions are as follows:CuS + Cl₂ ---> CuCl₂ + SCuO + 2HCl ----> CuCl₂ + H₂O

Reactive metals are metals that readily give up their electrons to form positive ions.

Reactive metals displace hydrogen from dilute acids. They are found in group 1A and 2A of the periodic table. Copper is not a reactive metal and will not displace hydrogen from acids.

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Sally is wrong because copper chloride is not made from the reaction of copper and dilute hydrochloric acid.

2. Copper (ii) chloride can be prepared as follows:

3. the equations of the reaction are:

Single replacement reactions are reactions in which a more reactive atom replaces another atom in a compound.

An example of a single replacement reaction is the reaction of chlorine gas with copper sulfide at high temperatures to form copper chloride.

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Molar mass of tungsten =183u

No of moles

No of atoms

Option C

Answer:

It gives the same result when an experiment is repeated.

Explanation:

Below are the possible answers to the question:

It is biased.

It cannot be verified.

It cannot add new evidence to existing evidence.

It gives the same result when an experiment is repeated.

The correct answer would be that it gives the same result when an experiment is repeated.

If a reaction is conducted in chemistry and certain results are obtained, once a detailed procedure of the experiment is known along with all the chemicals involved, such reaction/experiment can be repeated anywhere in the world and the same result would be obtained.

The repeatability of experiments always makes the experiments to be reliable. Hence, chemistry is reliable because it gives the same result without any variation when experiments are repeated under similar conditions.

Answer:

yes

Explanation:

Answer:

chemical bonds

Explanation:

The atoms in chemical compounds are held together by attractive electrostatic interactions known as chemical bonds. Ionic compounds contain positively and negatively charged ions in a ratio that results in an overall charge of zero. The ions are held together in a regular spatial arrangement by electrostatic forces.

In a pure solvent, the freezing point is a constant. The presence of solute causes the freezing point of the solvent to decrease. The solvent's freezing point is depressed.

A solution's freezing point is lower than that of the pure solvent's. This indicates that freezing can only take place when a solution is lowered to a lower temperature than the pure solvent. Road salting in water is a relatively prevalent example of this occurrence in daily life. At 0°C, pure water freezes. In a pure solvent, the freezing point is the temperature at which the solvent will form a solid. The presence of solute particles interferes with the ability of the solvent molecules to form a solid, causing the freezing point to decrease. The solvent's freezing point is thus lowered or "depressed" by the addition of solute particles.

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Answer:At the molecular level, the pressure of a gas depends on the number of collisions its molecules have with the walls of the container. If the pressure on the piston is doubled, the volume of the gas decreases by one-half. The gas molecules, now confined in a smaller volume, collide with the walls of the container twice as often and their pressure once again equals that of the piston.

Explanation:

Answer:

thanks

Explanation:

The number or amount of moles of magnesium sulfide in 100g of MgS is 1.774 moles.

The number of moles in a substance can be calculated by dividing the mass of the substance by its molar mass as follows:

Mole is the base unit of amount of substance i.e. the amount of substance of a system which contains exactly 6.02214076 × 10²³ elementary entities.

no of moles = mass ÷ molar mass

According to this question, 100g of magnesium sulfide is given. The molar mass of magnesium sulfide is 56.38 g/mol.

moles = 100g ÷ 56.38g/mol

moles = 1.774 moles

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Answer:

Sorry but i don't undertsnad the question.

Explanation:

Answer:

A physical change is a change to the physical—as opposed to chemical—properties of a substance. They are usually reversible. The physical properties of a substance include such characteristics as shape, color, texture, flexibility, density, and mass.

A chemical change happens when one chemical substance is transformed into one or more different substances, such as when iron becomes rust.

Do u want examples ?

From the calculations, the change in energy is - 190 J.

From the first law of thermodynamics, the energy is neither created nor destroyed but is transformed from one form to another.

From the law;

U = q + w

U = internal energy

q = heat

w = work

Since work is done on the surroundings and the gas absorbs heat then;

U = 132 J - 322 J

U = - 190 J

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The First step is to write and balance our reaction:

Mg + Br2 → MgBr2

As we can see Mg and Br2 have a charge equal to zero. Therefore, on the right side, we must have a zero electrical charge too.

--------------

The second step is to analyze what happens to each of them when the reaction occurs.

Mg) On the left, its oxidation state is 0, then in MgBr2, Mg has a +2 charge. So, we can say that if the atom goes from 0 to +2, it loses electrons (loses negative charges or gain positive charge). We can also say that Mg oxidized.

Until here, the atom that loses electrons gets oxidized.

Br)On the left, Br starts with 0, then in MgBr2, it has -1. So we can say that Br gained electrons (gain negative charge). We can also say that Br is reduced.

-------------

The 3rd step is to find the right statement.

Answer: The magnesium atom is losing electrons; therefore, it is oxidized.

Answer:

5H2 + 4NO = 2N2 +4H2O + H2

Explanation:

Reactants:

Five molecules that contains two hydrogen = 5H2

Four molecules that contains one nitrogen and one oxygen = 4NO

Products:

Two molecules that contains two nitrogen = 2N2

Four molecules that contains one oxygen and two hydrogen = H2O

One molecules that contains two hydrogen = 1H2 or H2

The balanced chemical equation for the reaction will be: 5 H₂ + 4 NO → 2 N₂ + 4 H₂O + H₂, and there is no limiting reactant in this reaction.

To write the balanced chemical equation for the reaction, let's first identify the reactants and products based on the information provided:

Reactants:

5 molecules contain 2 white spheres (Hydrogen): 5 H₂

4 molecules contain 1 red (Oxygen) and 1 blue (Nitrogen) sphere: 4 NO

Products:

2 molecules contain 2 blue spheres (Nitrogen): 2 N₂

4 molecules contain 1 red (Oxygen) and 2 white (Hydrogen) spheres: 4 H₂O

1 molecule contains 2 white spheres (Hydrogen): 1 H₂

Now, let's write the balanced chemical equation by ensuring that the number of atoms of each element is the same on both sides of the equation:

Reactants: 5 H₂ + 4 NO

Products: 2 N₂ + 4 H₂O + 1 H₂

The balanced chemical equation for the reaction is:

5 H₂ + 4 NO → 2 N₂ + 4 H₂O + H₂

Now, let's determine the limiting reactant:

From the balanced equation, we can see that the stoichiometric ratio between H₂ and NO is 5:4. This means that for every 5 molecules of H₂, we need 4 molecules of NO for the reaction to proceed completely.

Since we have 5 molecules of H₂ and 4 molecules of NO, both reactants are present in the exact stoichiometric ratio required for the reaction. Therefore, neither H₂ nor NO is in excess, and both will be fully consumed during the reaction. As a result, there is no limiting reactant in this reaction.

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--The given question is incomplete, the complete question is

"Oxygen is represented by a red sphere. Nitrogen is represented by a blue sphere. Hydrogen is represented by a white sphere. In the reactants there are five molecules that contain two white spheres and four molecules that contains one red and one blue sphere. In the products there are two molecules that contain two blue spheres, four molecules that contain one red and two white spheres, and one molecule that contains two white spheres. What is the chemical formula for the limiting reactant in the reaction shown? chemical formula: Write the balanced chemical equation for the reaction, using lowest whole-number coefficients."--

Answer:

here is the answer

Explanation:

ketone is the answer

Answer:

21

Explanation:

........................

Answer: 21

Explanation: