pls help me ASAP
its very urgent ​

Answer:

[tex]\boxed {\boxed {\sf P_2 \approx 3.53 \ atm}}[/tex]

Explanation:

In this problem, the temperature stays constant. The volume and pressure change, so we use Boyle's Law. This states that the pressure of a gas is inversely proportional to the volume. The formula is:

[tex]P_1V_1=P_2V_2[/tex]

Now we can substitute any known values into the formula.

Originally, the gas has a volume of 25.0 liters and a pressure of 2.05 atmospheres.

[tex]25.0 \ L * 2.05 \ atm = P_2V_2[/tex]

The volume is decreased to 14.5 liters, but the pressure is unknown.

[tex]25.0 \ L * 2.05 \ atm = P_2 * 14.5 \ L[/tex]

Since we are solving for the new pressure, or P₂, we must isolate the variable. It is being multiplied by 14.5 liters and the inverse of multiplication is division. Divide both sides by 14.5 L .

[tex]\frac {25.0 \ L * 2.05 \ atm }{14.5 \ L}=\frac{P_2 *14.5 \ L}{14.5 \ L}[/tex]

[tex]\frac {25.0 \ L * 2.05 \ atm }{14.5 \ L}= P_2[/tex]

The units of liters cancel.

[tex]\frac {25.0 * 2.05 \ atm }{14.5 }=P_2[/tex]

[tex]\frac {50.25\ atm }{14.5 }=P_2[/tex]

[tex]3.53448276 \ atm = P_2[/tex]

The original values of volume and pressure have 3 significant figures, so our answer must have the same.

For the number we found, that is the hundredth place.

The 4 in the thousandth place (in bold above) tells us to leave the 3 in the hundredth place.

[tex]3.53 \ atm \approx P_2[/tex]

The new pressure is approximately 3.53 atmospheres.

Answer:

Electrostatic repulsion, strong nuclear force

Explanation:

The nucleus consists of protons and neutrons. protons are positively charged while neutrons possess no charge.

Since protons are positively charged, they repel each other strongly (like charges repel). This strong repulsion of like charges makes the nucleus somewhat unstable leading to spontaneous fission of heavy nuclei.

However, an opposing force called nuclear attractive force tends to hold the nucleons together. This attraction occurs when two nucleons are bonded by a particle called a π meson.

Hence, the two forces that act in the nucleus to create a  'nuclear tug-of-war' are electrostatic repulsion and a strong nuclear force.

Answer:

Nuclear processes, including fusion, fission, and radioactive decays of unstable nuclei, involve changes in nuclear binding energies.

Explanation:

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Answer:

Explanation:

The balanced chemical equation between

SrO + 2HCl → H2O + SrCl2

endothermic

Explanation:

I believe it's an endothermic but I'm not all too sure

Answer:

Pottasium nitrate is highly exothermic!However the dissolution of sodium nitrate in water is endothermic. Heat is absorbed during process.

Answer:

Energy of Movement.

Explanation:

Have a great day!

Answer:

The grams of sodium chloride that will be made is 292.5 g. calculation. 2Na + Cl₂ → 2NaCl. step 1: calculate the moles of Na. moles = mass/molar mass. From periodic table the molar mass of Na = 23 g/mol. moles = 115 g/23 g / mol = 5 moles. Step 2 : use the mole ratio to determine the moles of NaCl. Na:NaCl is 2:2 = 1:1 therefore the moles of NaCl is also = 5 moles.

Explanation:

We know sodium is a very active metal and chlorine is also a very reactive non-metal. Usually, metals like to eliminate electrons and non-metals such as halogens like to accept electrons. Sodium readily eliminate its last shell electrons become Na+ cation and chlorine accepts that electron to form Cl-anion.

Answer: C

Explanation: I have the same question, it’s for summit, my teacher helped me with this question :)

Answer:

it will all fall unless these is air

Explanation:

Answer:

If you do it carefully enough, a small amount of water will pour out of the glass — that's supposed to happen. But try not to let any air bubbles get into the glass. Finally, slowly remove the hand holding the cardboard in place.

Answer: IS B

Explanation:

Decomposition

The statement is true  about the rotational period of the moon " the rotational period of the moon is equal to the revolution period around Earth."

A celestial object's rotation period may relate towards its sidereal rotation period, which is the time it takes for the object to complete one revolution around in its axis of rotation in sidereal seems like to the background stars.

The orbital period is also known as the revolution period. it takes for one astronomical object to complete one cycle around another. It refers to planets and asteroids orbiting the Sun, moons orbiting planets, planetary systems orbiting other stars, or double stars in astronomy.

In the night sky, the moon is just the brightest object. The moon doesn't at all produce its own light. It has no radiance. That is visible because the sun's light bounces off of it.

The rotational period of the moon is equal to the revolution period around Earth because the moon's rate of spin becomes tidally locked to its rate of revolution, it maintains the same face oriented towards the Earth In other words, every time the moon rounds the Earth, it rotates exactly once.

Therefore, the rotational period of the moon is equal to the revolution period around Earth will be correct answer.

To know more about rotational period click here.

https://brainly.com/question/242421.

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Answer:

14.6

Explanation:

I just took the test

The amount of heat to raise the temperature is 14.7J.

The specific heat capacity of a substance is the quantity of heat needed to raise the temperature of a unit quantity of the substance by one degree. Calling the amount of heat added Q, which will cause a change in temperature ∆T to a weight of substance W, at a specific heat of material Cp, then Q = w x Cp x ∆T

By applying the formula, we get

Q = w x Cp x ∆T

Q = 300 * 2.46 * 20/1000

Q = 14.760J

Heat is energy that is transferred from one body to another as the result of a difference in temperature.

Learn more about the heat here: brainly.com/question/13439286

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Answer:

its b alkyne

Explanation:

brinliest po plsss

Answer:

Alkyne so its b

Answer: 4,3,2

Explanation:

Answer:

Radioactive tracers are widely used to diagnose industrial reactors, for instance by measuring the flow rate of liquids, gases and solids.

Explanation:

Radioactive tracers are widely used to diagnose industrial reactors, for instance by measuring the flow rate of liquids, gases and solids. A radioactive tracer is a chemical compound in which one or more atoms have been replaced by a radioisotope.

heres the link for more information

https://www.iaea.org/topics/radiotracers#:~:text=Radioactive%20tracers%20are%20widely%20used,been%20replaced%20by%20a%20radioisotope

.

Answer:

0.188mol

Explanation:

Using the formula;

mole = mass/molar mass

Molar mass of hypomanganous acid. (H3MnO4) = 1(3) + 55 + 16(4)

= 3 + 55 + 64

= 122g/mol

According to this question, there are 22.912g of H3MnO4

mole = 22.912g ÷ 122g/mol

mole = 0.188mol

Answer:

4.00M NaOH

Explanation:

A 50-ml amount of 40.0M NaOH contains

(40.0 mol NaOH/1 L)×(0.0500L) = 2.00 mol NaOH

Adding enough water to make a 500.0 mL NaOH solution, the new concentration of this solution is

2.00 mol NaOH/0.5000 L = 4.00M NaOH

Answer:

NaSO⁴(ads) ,ganadicate

Answer:

location on the periodic table

Explanation:

Answer: When maganese dioxide is added to hydrogen chloride you get water maganese dichloride and chlorine gas then balanced equation is [tex]MnO_{2} + 4HCl \rightarrow 2H_{2}O + MnCl_{2} + Cl_{2}[/tex].

Explanation:

The word equation is given as maganese dioxide is added to hydrogen chloride you get water maganese dichloride and chlorine gas.

Now, in terms of chemical formulae this reaction equation will be as follows.

[tex]MnO_{2} + HCl \rightarrow H_{2}O + MnCl_{2} + Cl_{2}[/tex]

Here, number of atoms on reactant side are as follows.

Number of atoms on product side are as follows.

To balance this equation, multiply HCl by 4 on reactant side and multiply [tex]H_{2}O[/tex] by 2 on product side. Therefore, the equation can be rewritten as follows.

[tex]MnO_{2} + 4HCl \rightarrow 2H_{2}O + MnCl_{2} + Cl_{2}[/tex]

Hence, number of atoms on reactant side are as follows.

Number of atoms on product side are as follows.

Since, this equation contains same number of atoms on both reactant and product side. Therefore, this equation is now balanced equation.

Thus, we can conclude that when maganese dioxide is added to hydrogen chloride you get water maganese dichloride and chlorine gas then balanced equation is [tex]MnO_{2} + 4HCl \rightarrow 2H_{2}O + MnCl_{2} + Cl_{2}[/tex].

Answer:

two hydrogen can bonded with oxygen to form H2O

Answer:

Endoplasmic reticulum, Golgi apparatus, Nucleus, Storage Organelles, and Energy - Producing Organelles.

Explanation:

Hope its right! Mark me as Brainliest if it it right ;)!

Answer: 2.5

Explanation:

density= 2.5

mass= 62.5 or 62.50

volume= 25 ( 75-50= 25)

so divide 62.5( or 62.50) by 25 which will led you to 2.5

Answer:

10.)14

Explanation:

MARK AS BRAINLEST!!

Answer:

where is the answer??

Please do not just take the points without answering the question.

I think that the answer is protons

Answer:The thermal waters of a spring have a hydronium ion (H3O+) concentration of 2.00 x . 2. Acetic acid (CH3COOH) is one of the simplest carboxylic acids. It is an important chemical reagent and industrial chemical.Have a hydronium ion (H3O+) concentration of 2.00 x 10-6 M. Calculate the pH of the water.

Explanation: The thermal waters of a spring have a hydronium ion (H3O+) concentration of 2.  spring have a hydronium ion (H3O+) concentration of 2.00 x 10-6 M. Calculate the pH of the water. 2. Acetic acid (CH3COOH) is one of the simplest carboxylic acids. It is an important chemical reagent and industrial chemical.

Answer:

no

Explanation:

a compound is a mixture of two or more elements while a element is by itself.

Answer:

no

Explanation:

elements are their purest form. compunds are a mix of  mutiple elements.

Answer:

Fermentation, chemical process by which molecules such as glucose are broken down anaerobically. More broadly, fermentation is the foaming that occurs during the manufacture of wine and beer, a process at least 10,000 years old. The frothing results from the evolution of carbon dioxide gas, though this was not recognized until the 17th century.

Explanation:

looked it up-

Answer:

like babies or milk and cheese?

Explanation:

Answer:

a visible record (such as a series of colored bands, or a graph) showing the result of separation of the components of a mixture by chromatography.

Explanation:

Chromatography is a laboratory technique for the separation of a mixture. The mixture is dissolved in a fluid called the mobile phase, which carries it through a system on which is fixed a material called the stationary phase.

Answer:

Chromatography is a technique used to separate mixture of chemical substances into its individual compounds.

Explanation: