When the volume of a gas is changed from 1146 mL to 765 mL, the temperature will change from __ K to 640 K

Answer:

the answer is A. cooking the eggs

Answer:

A. Cooking the eggs

Explanation:

Cooking the eggs is a chemical change because it's a permanent change. There's no way to get the eggs back in its original form as an egg. Breaking the egg, stirring the egg, or even putting spices on the eggs are all examples of physical changes because they don't change the eggs' chemical composition. They only change its appearance.

Answer:

An experiment is an investigation in which a hypothesis is scientifically tested. In an experiment, an independent variable (the cause) is manipulated and the dependent variable (the effect) is measured; any extraneous variables are controlled. An advantage is that experiments should be objective.

Explanation:

Answer:

The water cycle is often taught as a simple circular cycle of evaporation, condensation, and precipitation. Although this can be a useful ...

Explanation:

Answer: Your answer will be D)

Explanation: Hope this helped

Answer: Aluminum reacts with oxygen to produce aluminum oxide

Explanation:

The conversion factor for the given chemical equation is 2:4.

To convert from moles of aluminum to moles of aluminum oxide, we can use the balanced chemical equation: [tex]4 Al+ 3 O_2\rightarrow 2 Al_2O_3[/tex]

The coefficients in the balanced equation can be used as conversion factors. In this case, we want to find the ratio of moles of aluminum oxide to moles of aluminum.

From the balanced equation, we can see that:

- For every 4 moles of aluminum, we get 2 moles of aluminum oxide.

So, the proper conversion factor has 2 moles of aluminum oxide in the numerator and 4 moles of aluminum in the denominator.

Therefore, the conversion factor is:2 moles of aluminum oxide : 4 moles of aluminum.

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Answer:

Your answer should be D. Fe(OH)3.

Answer:

All states of matter show random motion of particles

Explanation:

Answer:

KCl/K

2KCl/Cl2

(not sure if that's what you're looking for)

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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The concentration of X2+(aq) ion is mathematically given as

X^{2+}=3*10^{-10}M

Question Parameters:

the concentration of X2+(aq) ion in a 0.035 M (NO3)2 solution

Generally, the equation for the Chemical Reaction  is mathematically given as

X2+ + 6xH3--><--- (X(xH_3)_6)^2+

Therefore

X^{2+}=(X (xH_3) _6)^{2+}) /(x ^{2+})+(xH_3^6)

[tex]X^{2+}=\frac{0.375}{5.5*10^8*0.79^6}[/tex]

X^{2+}=3*10^{-10}M

Hence, we have that the  concentration of Ni2+(aq) ion is X^{2+}=3*10^{-10}M

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Answer:

12 moles of oxygen gas

Explanation:

12 moles of oxygen gas would be needed to completely burn 8 moles of hydrogen sulfide.

The mole ratio of a reaction is a ratio showing the how moles of reactants combine to form products or the ratio of moles if products formed to the moles of reactants used up.

The balanced equation of the reaction is given below:

[tex]2H_{2}S + 3O_{2}\rightarrow 2H_{2}O + SO_{2}[/tex]

3 moles of oxygen reacts completely with 2 moles of hydrogen sulphide.

8 moles of hydrogen sulphide will require 3 × 8/2 moles of oxygen = 12 moles of oxygen.

Therefore, 12 moles of moles of oxygen gas would be needed to completely burn 8 moles of hydrogen sulfide.

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Answer:

333.415 grams

Explanation:

If you multiply and do a few calculations, this is the answer :)

333.415 grams

Your general equation is Al + 3Cl -> AlCl3

A mole of Aluminum weighs 26.98 grams.

26.98 x 2.5 = 67.45 (so that is the weight of the aluminum in your AlCl3 compound.

Now lets add the weight of the Cl.

the molar mass of chlorine is 35.45 grams/mole.

Answer:

iam pretty sure it's 3, since the water boils from the bunsen burner

Answer:

Answer No. 3

Explanation:

Boiling liquids as they can become flammable.

Just connect an ammeter with circuit.

Answer:

in the image below

Explanation:

Answer:

KE = 1/2*m*v^2

KE = 1/2*150kg*(20 m/s)^2

KE = 75kg * 400m²/s²

KE = 30,000 kg*m²/s²

KE = 30,000 N*m

KE = 30,000 J

Explanation:

Hope this helped.

A brainliest is always appreciated.

Answer:

D) 2,3 and 4

Option A is not correct because not all elements in the periodic table have a full outer shell of electrons

Answer:

accretion at convergent boundaries

Explanation:

Answer :

As Per Given Information

Given volume of O₂ is 53 L

We've been asked to find the number of moles of O₂ gas contained

For finding the number of moles the following formulae is use

[tex]\\ \bullet{\boxed{\blue{\bf{Number \: of \: moles = \frac{Given \: volume}{22.4} }}}}[/tex]

Put the given value we obtain

[tex] \sf \dashrightarrow \: number \: of \: moles \: = \frac{53}{22.4} \\ \\ \sf \dashrightarrow \: number \: of \: moles \: = 2.366 [/tex]

So, the number of moles is 2.366 .

AT STP 1mol of any gas weighs 22.4L

Volume of oxygen=53L

No of moles

The path of energy flow from the sun to the humpback whale is as follows:

Energy is the ability to do work.

The primary source of energy on the earth is the sun.

The energy from the sun is used by producers to produce food on which other organisms depend on.

The energy from the sun gets to the humpback whale through producers such as plankton.

The path of energy flow from the sun to the humpback whale is as follows:

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The weight by volume of the prepared solution would be 22.73

The weight by volume of a solution is defined as the mass of the solute (in grams) per 100 mL of the solvent.

In this case, mass of solute = 25 grams

Volume of solvent = 110 mL

25 g is added to 110 mL

equivalent amount is 100 mL = 25 x 100/110

                                                   = 22.73 w/v

W/V concentration of the solution = 22.73

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Answer:

h+(aq)+no−2(aq)⇌hno2(aq)2. hno2(aq)⇌h+(aq)+no−2(aq)3. hno2(aq)⇌h−(aq)+no+2(aq)4. hno2(aq)+h+(aq)⇌h2no+2(aq)5. hno2(aq)+h−(aq)⇌h2no+2(aq)​b.

Explanation:

The acidic equilibrium equation for nitrous acid is shown as HNO₂ ⇄ H⁺ + NO₂⁻ in which acid is in equilibrium with its dissociate ions.

Equilibrium state in any chemical reaction is that state in which concentration of reactant and products will attain constant value.

Acidic equilibrium equation for Nitrous acid (HNO₂) is shown as:

HNO₂ ⇄ H⁺ + NO₂⁻

From the above equation it is clear that in equilibrium state concentration of nitrous acid is in equilibrium with the H⁺ ion and NO₂⁻ ion.

Hence, HNO₂ ⇄ H⁺ + NO₂⁻ is the acidic equilibrium equation.

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Reaction

2AgNO₃  +  Cu ⇒ Cu(NO₃)₂  +  2Ag

mol silver (Ag): 95.3 : 108 g/mol = 0.882

mol  copper nitrate (Cu(NO₃)₂): 82.9 : 187.5 g/mol = 0.441

mol Ag = 2 x mol Cu(NO₃)₂, so 0.441 being the mole basis of the reactants

mol Cu = 0.441

mass Cu = 0.441 x 63.5 g/mol = 28 g

mol AgNO₃ = 0.882

mass AgNO₃ = 0.882 x 170 g/mol = 149.94 g

Answer:

Step 1: CCl4 + 2(HF) --> CCl2F2 + 2(HCl)

Step 2: CCl2F2: 121 g/mol   CCl4: 154 g/mol

Step 3: 25.1 g

Step 4: 50.6%

Explanation:

Step 1: Write a balanced equation

The unbalanced form of the equation is just what the problem tells you in the beginning: Freon is synthesized from CCl4 with HF. HCl is also made as a byproduct. This means that our equation will be:

CCl4 + HF --> CCl2F2 + HCl

This equation is clearly unbalanced, as there are different numbers of atoms on either side.

Starting Atoms:

(The arrow shows what is on either side of the reaction arrow)

C: 1 --> 1

Cl: 4 --> 3

H: 1 --> 1

F: 1 --> 2

Let's first try adding a coefficient of 2 to HCl.

Coefficient One:

C: 1 --> 1

Cl: 4 --> 4

H: 1 --> 2

F: 1 --> 2

However, now the H (as well as the F) are out of balance on the left side of the arrow. Luckily, putting a coefficient of 2 in front of HF balances the equation completely.

Coefficient Two:

C: 1 --> 1

Cl: 4 --> 4

H: 2 --> 2

F: 2 --> 2

This means that the balanced equation is:

CCl4 + 2(HF) --> CCl2F2 + 2(HCl)

Step 2: Calculate the Molar Masses

To find the molar masses, we simply add up all of the individual atomic masses.

CCl2F2: (12.0)+2(35.5)+2(19.0) = 121 g/mol

CCl4: (12.0)+4(35.5) = 154 g/mol

Step 3: Calculate the Theoretical Yield in Grams

  We can now put together the previous steps. You typically need to figure out which molecule is the limiting reactant, but as they have only given you one initial mass, we can assume that CCl4 will be the LR. Essentially, the next step is to do several conversions to turn this reactant gram value into a product value. We will go from g of reactant to moles of reactant (using its molar mass), then to moles of product (with the balanced equation), and finally, to grams of product (using the other molar mass):

[tex]\frac{31.9g}{1} *\frac{1molCCl4}{154g} *\frac{1molproduct}{1molCCl4} *\frac{121g}{1molproduct}=25.1g[/tex]

This results in 25.1 g of product as our theoretical yield. This amount is the absolute maximum amount of product that could possibly be made from the amount of starting materials that we put in.

Step 4: Calculate the Percent Yield

This is probably the easiest step. All we have to do is use the following equation, and we will have our answer:

[tex](\frac{created}{expected})*100=yield[/tex]

The created value is what is given in the problem itself: 12.7 g

The expected amount is our theoretical yield value that we just calculated: 25.1 g

Substituting this into the equation, our percent yield is just over half at about 50.6%. Keep in mind that a yield of 100% is just about impossible due to human error, things being left on glassware, etc.

Answer:

No.2)answer

Explanation:

As elevation increases, atmospheric pressure decreases, causing water to boil at lower temperatures, which lengthens cooking times.A pressure cooker provides constant, precise atmospheric conditions inside the cooker, reducing cooking times even at high altitudes.

No.3 Answer

When something changes its state of matter (formally, a phase change), regardless of whatever it is, it remains at it's melting point/boiling point/freezing point UNTIL all of it has changed its state of matter.

When something changes its state of matter (formally, a phase change), regardless of whatever it is, it remains at it's melting point/boiling point/freezing point UNTIL all of it has changed its state of matter.So, to clear up, ice and water can both exist at 0°C at 1 atmosphere. The difference is that water has more energy than ice does, therefore solid water can break up the bonds and become a liquid.

When something changes its state of matter (formally, a phase change), regardless of whatever it is, it remains at it's melting point/boiling point/freezing point UNTIL all of it has changed its state of matter.So, to clear up, ice and water can both exist at 0°C at 1 atmosphere. The difference is that water has more energy than ice does, therefore solid water can break up the bonds and become a liquid.I heavily suggest you take a look at calorimetry, it explains it greatly and is related to your question.

Answer:

the limiting reactant is the reactant that gets used up first, so the limiting reactant is Cl2

Answer:

the flow of electricity requires a closed circuit

Answer: The chocolate has melted, which means it has turn from a solid to a liquid. A liquid has a definite volume but an indefinite shape. Therefore, the correct answer is B.

Priya brought a solid chocolate bar to school to eat as a snack in the afternoon. She left it in her pocket for a few hours. When she took out the chocolate bar to eat it, the bar was was no longer solid. The description that best describes the current state of the chocolate is "The chocolate is now made up of particles packed relatively close together, having an indefinite shape but a definite volume".

There are basically 3 states of matter - Solids, Liquids and gases.

Solid is having definite shape and definite volume, Liquid is having indefinite shape and definite volume and gas is having indefinite shape and indefinite volume.

Liquid and gas states are fluids that can flow easily and their particles are far away from each other.

Water is a liquid, Hydrogen and Oxygen are gases, Ice is a solid.

Given is that Priya left chocolate in her pocket for a few hours. When she took out the chocolate bar to eat it, the bar was was no longer solid.

Therefore, When she took out the chocolate bar to eat it, the bar was was no longer solid. The description that best describes the current state of the chocolate is "The chocolate is now made up of particles packed relatively close together, having an indefinite shape but a definite volume".

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Answer:

There!!

Explanation:

mark me brainliest!!

Answer:

A

Explanation:

Atomics number = number of protons