this one too please lol

Answer:

i think 2 figure ..............

Answer: 3

Explanation:

Considering the definition of molar mass, the correct answer is option c): the mass of 1.85 moles H₂O₂ is 62.9 grams.

The molar mass of substance is a property defined as the amount of mass that a substance contains in one mole.

The molar mass of a compound is the sum of the molar mass of the elements that form it (whose value is found in the periodic table) multiplied by the number of times they appear in the compound.

In this case, you know the molar mass of the elements is:

So, the molar mass of the compound H₂O₂ is calculated as:

H₂O₂= 2× 1 g/mole + 2× 16 g/mole

Solving:

H₂O₂= 34 g/mole

You can apply the following rule of three: If by definition of molar mass 1 mole of the compound contains 34 grams, 1.85 moles of the compound contains how much mass?

mass= (1.85 moles× 34 grams)÷ 1 mole

mass= 62.9 grams

Finally, the mass of 1.85 moles H₂O₂ is 62.9 grams.

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Answer:

0.0017 mole

Explanation:

1 mole = 6.02 x 10^23 atoms

so the number of mole in 1.0 × 10^21 atoms is

(1.0 × 10^21)/(6.02 x 10^23) = 0.00166112956 or 0.0017 mole

Answer:

4 mole hydrozen and 2 mole oxyzen

Explanation:

Answer:

Here is the answer from somewhere in the internet

Answer:Cobb

Explanation:What y'all

Answer: 1.58 x 10-17

The frequency of a wave is inversely proportional to its wavelength, meaning that as the wavelength increases, the frequency decreases and vice versa. We can use the following formula to calculate the frequency of a wave given its wavelength:

Frequency = Speed of light / Wavelength

Plugging in the values from the question, we get:

Frequency = 3 x 10^8 m/s / (4.75 x 10^-9 m)

= 1.58 x 10^-17 Hz

Therefore, the frequency of the wave is 1.58 x 10^-17 Hz.

When the moving car brakes to the stop the kinetic energy of car will be converted to the heat energy.

The mechanical brake will be applies to the friction force and it convert the kinetic energy of the car into the thermal energy that which then dissipates on atmosphere. The process of the braking will follow the principle of the conservation of the energy.

The conservation of the energy is the principle, that is expressed in its the most general form, and it is the first law of the thermodynamics. The first law of thermodynamics explains that "the energy of the universe remains the same."

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This question is incomplete, the complete question is :

A car in motion has kinetic energy. A moving car is suddenly stopped. Why does the car stop? Where did the energy go?

Answer:

it is a soft and very cold molocules but at the touch of a hand it will melt because of how compact the molocules are

Explanation:

gallium can only stay a solid under 85.59°F so is someone had is in there had is would end up like ice cream

Explanation:

In fluorine

protons = 9

Neutrons = 10

Electrons = 9

Hope it will help :)❤

The percent by mass of the nitrogen is  82.4%.

We have to note that the percent by mass can be obtained when we know the molar mass of the compound and that is the first thing that we would need to find in the problem that we have in the question that have been asked.

The molar mass of the compound is; 14 + 3(1) = 17 g/mol

The percent by mass = Mass of N/ molar mass * 100/1

= 14/17 * 100/1

= 82.4%

The nitrogen would have a percent by mass in the compound of about  82.4%

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The reaction of 2-Bromo-2-Ethyl-3-Methylbutane with methanol is an example of a nucleophilic substitution reaction.

In this reaction, the methanol molecule acts as a nucleophile and attacks the carbon atom of the bromoalkane, resulting in the displacement of the leaving group (bromine) and the formation of a new carbon-oxygen (C-O) bond.

The reaction mechanism can be described as follows:

Protonation: In the first step, the methanol molecule acts as a base and abstracts a proton from the sulfuric acid catalyst to form the methoxide ion (CH3O-).

Nucleophilic attack: The methoxide ion then attacks the carbon atom of the bromoalkane, which is electrophilic due to the electron-withdrawing effect of the bromine atom. The attack results in the formation of a transition state in which the carbon-bromine bond is weakened and the carbon-oxygen bond is forming.

Elimination: The transition state then collapses to form the product, methylethylmethylcarbinol, with the simultaneous loss of the bromide ion. This step is known as the elimination step and occurs as the newly formed C-O bond is more stable than the weakened C-Br bond.

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The mass of the asteroid is C. 1.2 x \(10^{12}\) Kg

To find the mass of the other asteroid, we can rearrange the equation for the gravitational force between two objects:

F = (G * m1 * m2) / \(r^{2}\)

where F is the force of gravity, G is the gravitational constant, m1 and m2 are the masses of the two asteroids, and r is the distance between them.

Given that the distance between the asteroids is 75000 m, the force of gravity between them is 1.14 N, and one asteroid has a mass of 8 x \(10^{7}\) kg, we can substitute these values into the equation and solve for the mass of the other asteroid (m2):

1.14 N = (6.67430 × \(10^{-11}\) N \(m^{2}\)/\(Kg^{2}\) * 8 x \(10^{7}\) kg * \(m2\)) / \((75000 m)^{2}\)

Simplifying and solving the equation, we find that the mass of the other asteroid (m2) is approximately 1.2 x \(10^{12}\) kg. Therefore, Option C is correct.

The question was incomplete. find the full content below:

Two asteroids are 75000 m apart one has a mass of 8 x \(10^{7}\) kg if the force of gravity between them is 1.14 what is the mass of the asteroid

A. 3.4 x \(10^{11}\) kg

B. 8.3 x \(10^{12}\) kg

C. 1.2 x \(10^{12}\) kg

D. 1.2 x \(10^{10}\) kg

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Answer:

1) 0.468 atm

Slide 4: 9.2 atm Slide 5: D B E

Slide 6:

Gas A 1.31,

Gas B 0.444

Explanation:

edge 2022

The inside of a basketball has a pressure of 0.476 atm at 25.0°C. The pressure inside the ball if the temperature is decreased to 20.0°C is 0.484 atm.

The term pressure is defined as the amount of force applied perpendicular to the surface of an object per unit area. The symbol for it is "p" or P.

There are two basic types of pressure are absolute and gauge - distinguished by what pressure they are compared to, which is called the reference pressure.

Given:

P1 = 0.476 atm

T1 = 25.0°C = 298K

P2 = ?

T2 = 20.0°C = 293 K

P1T1 = P2T2

By putting these values in above equation and we get,

P2 = P1T1/ T2

= 0.476 ×298 / 293

= 0.484 atm

Thus, the pressure inside the ball if the temperature is decreased to 20.0°C is 0.484 atm.

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Answer:

macronutrients (carbohydrates, lipids, and proteins)

Answer is

A methhanoic Acid

A group of similar or different atoms linked together makes the molecules. The molecule given is methanoic acid. Thus, option A is correct.

Methanoic acid is a compound that has carboxylic acid as the functional group. It is the simplest carboxylic acid that has the formula HCOOH. As the molecule has a COOH group it will be acid.

The molecule can not be an aldehyde as it lacks the R−CH=O group, it cannot be alcohol as it lacks the OH group, and neither it can be methylamine as it lacks the nitrogen group.

Therefore, option A. methanoic acid is correct.

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Answer:

0.25 grams

Explanation:

mass = (concentration x volume) / 100

The concentration of ketamine is 10.0%w/v and the volume is 2.50 ml.

mass = (10 x 2.50) / 100

mass = 0.25 g

So, there is 0.25 grams of ketamine in 2.50 ml of a 10.0% (w/v) solution.

Answer:

\(V_{H_2O}=460 mL\)

Explanation:

Hello!

In this case, in a dilution process, water is added to a solute in order to decrease its concentration but increase the volume of the solution. It means that if we have 20.0 mL of a 12.0-M solution of HCl and we want a 0.500-M solution, we need to apply the following formula considering that the moles remain unchanged:

\(M_1V_1=M_2V_2\)

Thus, solving for the final volume is:

\(V_2=\frac{M_1V_1}{M_2}\)

So plugging in the values we obtain:

\(V_2=\frac{12.0M*20.0mL}{0.500M}\\\\V_2=480 mL\)

Now, since the initial volume of acid was 20.0 mL and the final volume is 480 mL, the added volume of distilled water is:

\(V_{H_2O}=480-20=460 mL\)

Best regards!

The value of the equilibrium constant shows the relative amounts or concentrations of the reactants and products.

The mass of carbon dioxide that would be produced by the complete combustion of 2.05 moles of sucrose is 1,082.4 g.

The complete combustion of sucrose in excess oxygen is given as follows;

C₁₂H₂₂O₁₁(s) + O₂(g) → CO₂(g) + H₂O(l)

balanced chemical equation is below;

C₁₂H₂₂O₁₁(s) + 12O₂(g) → 12CO₂(g) + 11H₂O(l)

from the reaction above;

1 mole of sucrose ----------> 12 mole of carbon dioxide

2.05 mole of sucrose ------> ?

= 2.05 x 12

= 24.6 moles

1 mole of carbon dioxide = 44 g/mole

24.6 moles = ?

= 24.6 x 44

= 1,082.4 g

Thus, the mass of carbon dioxide that would be produced by the complete combustion of 2.05 moles of sucrose is 1,082.4 g.

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When two objects have the same mass and applied force to them then their acceleration will be the same. Therefore, option (B) is correct.

The acceleration of an object is described as the rate of change of velocity with respect to time. The acceleration is a vector parameter as it contains magnitude and direction. Acceleration is equal to the second derivative of position w.r.t. time and is equal to the first derivative of velocity of an object w.r.t. time.

According to Newton's second law of motion, acceleration is inversely proportional to the mass of the body.

F = ma

or, a = F/m

The acceleration depends upon two factors applied force and the mass of the object. If both factors are the same for an object then the acceleration will be the same.

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Answer: A

Explanation:

Answer::

Explanation::

The angle of the sun's rays relative to the Earth and moon determines the size of the umbra and penumbra. A small change in the distance between Earth and the moon would result in a small change in the angle of the sun's rays, which would result in a small change in the size of the umbra and penumbra.

During a penumbral lunar eclipse, the earth's outer shadow falls on the moon. (v) During an eclipse, the umbra shrinks as the distance from the sun grows. On the contrary, as the distance from the sun increases, so does the penumbra.

The diameter of the Moon's umbra decreases with increasing distance from it, as the Moon appears to shrink in size. This produces a cone-shaped umbra.

Thus, The reason for the larger penumbra is due to the Moon's distance from Earth and the fact that the Moon is smaller than the Sun.

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 The best experimental  results in  c. When pH > pKa,\(HC_{7} H_{5} O_{2}\)  > \([NaC_{7} H_{3} O_{2}\)] and \(HC_{7} H_{5} O_{2}\)(s) precipitates from the solution.

When pH > pKa, [\(HC_{7} H_{5} O_{2}\)] > \(NaC_{7} H_{3} O_{2}\) and \(HC_{7} H_{5} O_{2}\), (s) precipitates from the solution is the explanation of the experimental results given  above. Benzoic acid, HC-H502, has a pK, of 4.20 and a molar solubility of 0.0278 M.

Sodium benzoate, \(NaC_{7} H_{5} O_{2}\)s, has a molar solubility of 4.16 M.The given experimental data is shown in the following table:When a sample of 50.0 mL of 2.00 M \(NaC_{7} H_{5} O_{2}\) (aq) was treated with 3.00 M HCl, the pH was noted

The solid crystals were filtered, dried, and weighed. When the pH is greater than pKa, the concentration of benzoic acid (\(HC_{7} H_{5} O_{2}\)) in the solution is greater than the concentration of benzoate (\(NaC_{7} H_{5} O_{2}\)), and benzoic acid (s) precipitates out from the solution .The correct answer is C).

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Explanation:

allowing 20% discount on the market price of a watch the value of the watch will be rs 2376 when a VAT of 10% is added ,find it's market price

Answer: decreases down a group

Explanation: As we move down the group atomic radii increased with increase of atomic number. The addition of electron in next level cause the atomic radii to increased. The hold of nucleus on valance shell become weaker because of shielding of electrons thus size of atom increased.As the size of atom increases the ionization energy from top to bottom also  decreases because it becomes easier to remove the electron because of less nuclear attraction and as more electrons are added the outer electrons becomes more shielded and away from nucleus.