During Taylor's second test of a car with a mass of 200 grams, she recorded 11 seconds, 11.4 seconds, and 11.2 seconds for her 3 trials. What would be the mean value she would use to compare with the other cars?

11 seconds

33.6 seconds

11.2 seconds

11.53 seconds

D. Water

Answer: Calcium

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Answer:

2.1×6.02×1023÷ 14

9.03×1022 atom of nitrogen

Explanation:

A solution with a pH of 13.8 means that the solution is a strong base.

pH refers to power of hydrogen. The pH is a scale used to measure the degree of acidity or alkalinity of a solution.

pH scale ranges from 0 - 14

Where;

However, the closer the pH value is to 1, the more the acidity and vice versa while the closer it is to 14, the more the alkalinity and vice versa.

Therefore, a solution with a pH of 13.8 means that the solution is a strong base.

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Aldol condensation involves  two aldehydes or two ketones or an aldehyde and a ketone. The product of the reaction is shown in the image attached.

Aldol condensation is a reaction that involves two aldehydes or two ketones or an aldehyde and a ketone. This reaction occurs at the carbonyl group as one of the carbonyl compounds is in the enolate form.

The product of the reaction is shown in the image attached. This gives the mechanism for the Aldol condensation of the compound 3‑methylbutanal.

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The number of moles of air present is 0.056 mole

The ideal gas is one in which molecules do not attract or repel each other.Many gases like oxygen,nitrogen, carbon di oxide can be treated as the ideal gases as particular temperature and pressure.The real gases at high temperature and lower pressure can be treated as ideal gases.

The given data in the question is

Volume = 1.35 L

Pressure (P) = 750 torr

Temperature (T) = 17 °C = 17 + 273 = 290 K

Gas constant (R) = 62.396 L•torr/mol•K

The number of moles (n) =?

How to determine the number of moles:

The number of moles present can be obtained by using the ideal gas equation as illustrated below:

[tex]PV=nRT[/tex]

Divide both sides by RT

[tex]n=\dfrac{PV}{RT}[/tex]

[tex]n=\dfrac{(750\times 1.350}{62.396\times 290)}[/tex]

[tex]n=0.056\ moles[/tex]

Hence, the number of moles of air present is 0.056 mole

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Answer:

answer in picture

Explanation:

The buret should be conditioned before loading it with the titrant.

This is defined as laboratory apparatus which is used in quantitative chemical analysis to measure the volume of a liquid or a gas.

It should be conditioned with the titrant solution to prevent dilution from occurring as a result of cleaning it with water.

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Answer:

In summary, a real gas deviates most from an ideal gas at low temperatures and high pressures. Gases are most ideal at high temperature and low pressure. What factors attributes to the deviation of gas law from the ideal gas theory?

Explanation:

Real gases deviate the most from the ideal gas law under low temperature and high pressure.

Ideal gas laws say about hypothetical gases, the collision between the molecules of an ideal gas would be perfectly elastic.

There are three variables of an ideal gas, absolute temperature, pressure, and volume.

PV = nRT

Thus, real gases deviate the most from the ideal gas law under low temperature and high pressure.

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Answer:

b

Explanation:

many solids are crystalline hence a is eliminated

graphite contains free electrons while diamond uses all electrons in bonding and many substances have that property hence c is eliminated

only substances made up of carbon produce carbondioxide as the product when burnt

Answer:

solute dissolves in a solution

Answer:

solvent

Explanation:

because solvent are liquid that disolves

If the temperature of the O2 in the container rises as a result of being abandoned for quite some time, the pressure in the container will increase and this may either lead to an explosion or leakage of the gas.

At constant volume, the pressure of a gas increases with increased temperature as a result of an increase in the average kinetic energy of the gas molecules which increases the collision rate among the molecules.

Thus, if the temperature of a gas in a container increases, the pressure inside the container will also increase. This may lead to the gas leaking from the container or the container may even outrightly explode due to pressure.

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Answer: here's the answer to your question

1.3 ×10¹ is the average reaction rate for O[tex]_2[/tex] in this reaction N2(g) + O2(g) ⟶ 2NO(g).

What is rate of reaction?

The pace during which a chemical response takes place is known as the reaction rate and rate of reaction. It is proportional to the rise in product concentration per unit time and the fall in reactant concentration per unit time. Response times can differ wildly.

For instance, cellulose burns in a fire in a matter of seconds as opposed to the sluggish, years-long oxidative corrosion of iron that occurs under Earth's atmosphere. For the majority of reactions, the rate gets slower as it goes along. By tracking the concentration changes over time, one can calculate the pace of a reaction.

concentration of N[tex]_2[/tex] =0.34/0.75=0.45M

concentration of O[tex]_2[/tex] =0.34/0.75=0.45M

concentration of NO=1.2/0.75=1.6

Kc = [NO]²/ [ N[tex]_2[/tex] ] × [ O[tex]_2[/tex] ]

    =  [0.45]²/ [ 0.45 ] × [ 1.6 ]

    = 1.3 ×10¹

Therefore, 1.3 ×10¹ is the reaction rate.

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The second quantum number of a 3p₃ electron in phosphorus 1s2, 2s2, 2p6, 3s2, 3p3 is 3.

Quantum numbers are a set of numbers that describe the position and energy of an electron in an atom.

Principal, azimuthal, magnetic, and spin quantum numbers are the four types of quantum numbers.

Thus, the second quantum number of a 3p₃ electron in phosphorus 1s2, 2s2, 2p6, 3s2, 3p3 is 3.

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Answer:

Melamine

Explanation:

Answer:

no, food is not a fuel because it just give energy to do many activities but it will not provide any fuel only the dead and decaying material which berries under the soil then after a long years it becomes fossil fuel

Answer:

approximately 1 week

Explanation:

Hope this helps, feel free to give feedback

1 to 2 weeks but if they smell a litte more stink then usually you better get rid of them or they my make you sick. i got sick for old boiled egg from the school cafeteria a long time ago.

Explanation:

Answer:

Explanation:

the answer is 8.66


Mark me brainliest please.

The pH of the solution formed by mixing 25. 0 ml of a 0. 15 m solution of NH₃ with 25. 0 ml of 0. 12 m HCl is 8.66.

pH is potential hydrogen. It is the measurement of the acidity and basicity of any solution.

The solution of NH₃ is 25. 0 ml of a 0. 15 m

The solution of HCl is 25. 0 ml of 0. 12 m hcl

The pkb value is [tex]1.8 \times 10^-^5[/tex]

Putting the value in the formula

[tex]pOH=pKb +log[NH_3][HCl]\\\\ pOH = 1.8 \times 10^-^5+ log \dfrac{25.0 \times 0.15}{ 25.0 \times 0.12} \\\\ pOH = 1.8\times10^-^5+ log1.25 \\\\pOH = 1.8\times 10^-^5 + 1.25 = 3.05\\\\ pH = 14 - pOH = 14 - 1.25 = 8.66[/tex]

Thus, the pH of the solution formed by mixing 25. 0 ml of a 0. 15 m solution of NH₃ with 25. 0 ml of 0. 12 m HCl is 8.66.

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Answer:

it's is math that you can answer with your sister and your mother

Answer:

346 degrees because 326+20= 346

Answer:

khate ko ban randi ko ban

Paul J. Chirik developed methods associated with chemistry catalysis and transition metals, which may result useful for the development of manufacturing technologies.

Catalysis refers to the chemical processes that increase the rate of different types of reactions by lowering its activation energy.

Proteins (enzymes) are biological catalysts that increase the rate of chemical reactions in biological systems.

Catalysis may be reached by using transition metals (e.g., actinium and rutherfordium), which result useful in the development of manufacturing technologies.

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The resulting volume of the tire would be 1.1 L

According to this law, the volume of a given gas is directly proportional to its temperature, provided that the pressure remains constant.

The law can be presented mathematically as;  

[tex]\dfrac{V_1}{T_1} =\dfrac{V_2}{T_2}[/tex]

In this case, V1 = 1.0 L, T1 = 22 °C (295 K), T2 = 52 °C (325 K).

[tex]V_2=\dfrac{V_1T_2}{T_1}[/tex]V

[tex]V_2=\dfrac{1\times 325}{295}=1.1\ L[/tex]

Hence the final volume of the tire will be 1.1 L

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Owing to the fact that allene is not a planar molecule, the hydrogen atoms in the molecule do not lie on the same plane.

A planar molecule refers to those molecules that lie on same plane. This means that the atoms in the molecules are all arranged along the same plane.

Now we know that the molecule allene is not a planar molecule. Owing to the fact that allene is not a planar molecule, the hydrogen atoms in the molecule do not lie on the same plane. All the carbon atoms present are sp2 hybridized.

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Answer:

condenses

Explanation:

change or cause to change from a gas or vapor to a liquid.

Answer:

What are three ways continents get bigger?

age of rocks.

fossils.

evidence of melting (subduction)

location on current continents.

glacial deposits.

Answer:

Ammonia and oxygen without catalyst | NH3 + O2 → N2 + H2O. With supply of heat, ammonia reacts with oxygen and produce nitrogen gas and water as products. Nitrogen of ammonia is oxidized to nitrogen gas from -3 oxidation state to 0 oxidation state.

Explanation:

Answer:

The pH of a 4.4 M solution of boric acid is 4.3

Explanation:

at t=0  cM              0             0

at eqm                    

So dissociation constant will be:

Give c= 4.4 M and  = ?

Putting in the values we get:

Also

Thus pH of a 4.4 M  solution is 4.3

Answer:

1. mechanical energy

2. Kinetic energy

3. Energy

4. Work

5. potential energy

Explanation:

1. The total amount of mechanical energy is merely the sum of the potential energy and the kinetic energy. This sum is simply referred to as the total mechanical energy 
2. All moving objects have kinetic energy. When an object is in motion, it changes its position by moving in a direction: up, down, forward, or backward.

3. Energy is defined as the ability to cause changes in matter. You can change energy from one form to another when you lift your arm or take a step. In each case, energy is used to move matter — you. The energy of moving matter is called kinetic energy.

4. transfer of energy that occurs when a force makes an object move. For work to occur, an object must move. The motion of the object must be in the same direction as the applied force on the object.

5. potential energy is the energy that is stored in an object due to its position relative to some zero position. An object possesses gravitational potential energy if it is positioned at a height above (or below) the zero height.

Answer:

Diffraction involves a change in direction of waves as they pass through an opening or around a barrier in their path.

Reflection involves a change in direction of waves when they bounce off a barrier; refraction of waves involves a change in the direction of waves as they pass from one medium to another

Explanation:

If we use water waves as an example, waves hitting shallower water at an angle will slow down and change direction slightly. That is refraction

Waves hitting an island will bend and eventually close in on the "shadow" of the island. That is diffraction

Based on the energy usage shown by the graph, the best option for the chemical change represented is the combustion of iron.

The combustion of iron in oxygen leads to the formation of Iron (III) oxide in solid form.

For the combustion of iron to happen, a lot of heat has to be applied to the iron which is why the potential energy of reactants is high. As the reaction progresses, the energy needed reduces as iron (III) oxide is formed.

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