What features of this model will help Armando answer the question?

-2.5089 kJ is the amount of heat is released by the combustion of the naphthalene.

Released amount of heat is calculated by using the below formula:

Q = -mcΔT, where

m = mass of naphthalene = 0.25g

c = specific heat of calorimeter = 4.13 kJ/°C

ΔT = change in temperature = 26.43°C - 24°C = 2.43°C

Putting all these values in the above equation, we get

Q = - (0.25 × 4.13 × 2.43) = - 2.5089 kJ

Hence, - 2.5089 kJ heat is released.

To know more about released heat, visit the below link:

https://brainly.com/question/13439286

Answer:

Well first, a scientific claim is claims or statements after experimenting. Similar to other claims but they have evidence and data to support the claim.

So we would show demonstrations because we need support our scientific claim.

I think the answer will be:

C. Increase the rate forward and reverse reactions equally.

Answer:

the solvent =water+coffee powder

the solute =sugar

Explanation:

Breaking up, crushing or grinding a sugar cube before adding it to water increases the sugar's surface area. The more surface area a solute has, the faster it will dissolve because more particles of the sugar can interact with the water. This means the finer the sugar particles meaning a larger surface area which leads to an increase in a faster reaction

Answer:

[tex]P_T = 1627\text{ mm Hg}[/tex]

Explanation:

Dalton's law of partial pressures states that the total pressure in a mixture of gases is the sum of the partial pressures of the individual gases.

In other word:
[tex]\displaystyle P_T = P_A + P_B + P_C[/tex]

Therefore, the total pressure of the mixture of three gases is:
[tex]\displaystyle \begin{aligned} P_T & = (445 \text{ mm Hg}) + (560\text{ mm Hg}) + (622\text{ mm Hg}) \\ \\ & = 1627 \text{ mm Hg}\end{aligned}[/tex]

In conclusion, the total pressure of the mixture is 1627 mm Hg.

Answer:

evaporation?

Explanation:

evaporate the water leaving behind the sand?

Answer:

in 1983, Lake Mead had a recorded water level of 1,225 feet above sea level. The closest it's been to that level in modern times was in 2000. Explanation:

Answer:

The responding variable

Explanation:

The independent variable in a study refers to the factor that is being manipulated in an experiment.

As the independent variable is changed, its effect on the responding (dependent) variable is accessed.

The responding variable changes as the independent variable is manipulated, they do not mean the same thing.

Answer:

With the cooler water at the bottom, this uneven temperature distribution creates convection currents that accelerate the cooling process. Even with more ground to cover to freeze, the temperature of the hotter water can drop at a faster rate than the cooler water.

Explanation:

London’s "killer fog" or The Great Smog of London was the extreme event of air pollution in London. Millions of coal fires and stagnant air were the prime reason for the event.

The Great Smog of London was one of the worst events of the air pollution that engulfed the city of England. The industrial air pollutants of the burning coal and high-pressure weather circumstances made the city covered in smog.

This event caused many deaths due to pneumonia and bronchitis in people.  The burning of the coal in the industrial plants of the city was the major reason for the smog.

Therefore, option B. millions of coal fires and stagnant air were the main reason for the great smog of London.

Learn more about the Great Smog of London here:

https://brainly.com/question/1014074

Answer:

It's A

Explanation:

I took the test. For A p e x

Answer:

Blue

Explanation:

Blue would have the longest wave length because following ROY G BIV the wave length distance between the two decreases as you move from Red to Violet.

Answer:

Solid

Explanation:

Gas and liquids cant have definite shape which should be crossed off after you read shape because gas goes everywhere and liquids are too runny

Answer: Each element is given its own chemical symbol, like H for hydrogen or O for oxygen. Chemical symbols are usually one or two letters long.

Explanation:Every chemical symbol starts with a capital letter, with the second letter written in lowercase. For example, Mg is the correct symbol for magnesium.

Answer:

Winnowing

Explanation:

Wind blows the lighter(in terms of mass) chaff from the whole grains,which are heavier(in terms of mass)

A force is an agent that causes a change in the shape or state of motion of an object.

Forces such as gravity, helps keep objects on earth's surface.

A force is a pull or push agent which causes a change in the shape or motion of a body.

Forces may or may not result in motion.

Forces can change the position, shape and movement of an object but not its color.

Types of forces include:

Friction is a force that slows or stops the motion of an object.

Magnetism is a force is that attracts objects mad of steel, nickel, or cobalt.

Gravity is a force that pulls objects to the centre of the earth.

Example of a pushing force is pushing a car.

Example of pulling force is closing a car door.

Due to the gravitational force acting on all bodies on the earth surface, we do not fall off the earth.

Learn more about force at: https://brainly.com/question/12970081

Answer:

When the water droplets in the cloud get too heavy they will fall. Which causes rain to fall. Gravity force pulling the droplets toward the Earth's surface.

It pulls precipitation down form could and pulls water downhill. Gravity pulls denser air and water downwards, forcing less dance air and water to move upwards.

Reactant concentration, the physical state of the reactants, surface area, temperature, and the presence of a catalyst are the four factors to influence the rate of a homogeneous reaction.

The term rate of reaction is defined as the speed at which a chemical reaction takes place. It is also defined as proportional to the increase in the concentration of a product per unit time and to the decrease in the concentration of a reactant per unit time.

Surface area, greater surface area, more collisions are available and then concentration, when increase the concentration then increase the likelihood of reactants colliding. Catalysts increase reaction without itself getting used up.

Thus, The factors to influence the rate of a homogeneous reaction are Reactant concentration, the physical state of the reactants, surface area, temperature, and the presence of a catalyst.

To learn more about the rate of reaction, follow the link;

https://brainly.com/question/30546888

#SPJ2

Answer:

Pure copper sulphate can be obtained from an impure sample by re-crystallization. The impure sample is dissolved in water, heated and then cooled which then later forms crystals. These copper sulphate crystals are then separated by filtration and drying.

Answer:

???????????

Explanation:

The volume of stock solution they use to make the required solution is 6.94mL.

To calculate the value of required volume we will use the below equation:

M₁V₁ = M₂V₂, where

M₁ = molarity of stock solution = 18M

V₁ = volume of stock solution = to find?

M₂ = molarity of H₂SO₄ solution = 2.50M

V₂ = volume of H₂SO₄ solution = 50mL

On putting all these values on the above equation and calculate for the value of V₁ as:

V₁ = (2.50)(50) / (18) = 6.94mL

Hence correct option is (3) i.e. 6.94mL.

To know more about stock solutions, visit the below link:
https://brainly.com/question/3942978

Answer:

C. 6.94 mL

Explanation:

Correct on Edge 2022!!!

Good luck everyone, you got this! Have a great day!

Bronsted - Lowry base can accept a hydrogen ion and can produce hydronium.

Bases have the pH value in between the range of 7 to 14.

According to the Bronsted - Lowry theory of acid & base, those substance which produces H⁺ ion or proton in the aqueous medium are known as acids and those substance which accepts the H⁺ ion or proton in the aqueous medium are bases. Water is also behave as Bronsted - Lowry base as it accepts the H⁺ ion and forms hydronium ion H₃O⁺.

Hence, option (b) & (c) are correct, i.e. They can accept a hydrogen ion and produce hydronium.

To know more about Bronsted - Lowry base, visit the below link:

https://brainly.com/question/8688802

Answer:

The answer is 14,400 seconds.

Explanation:

Hope it helps man ...

Answer:14400secondsExplanation:                                                                            

With a container at 1.30 atm and 224 K is heated to 815k, the new

the pressure of the gas is mathematically given as

P=4.7299atm

Question Parameter(s):

A sample of gas in a rigid container at 1.30 atm and 224 K is heated to 815

K.

Generally, the equation for the Ideal gas  is mathematically given as

P1/T1=P2/T2

Therefore

1.30/224=P2/815

P=4.7299

In conclusion,  new the pressure

P=4.7299atm

Read more about Pressure

https://brainly.com/question/25688500

Answer:

The direction of flight depends on the wind, but the altitude of the balloon can be controlled by changing the temperature of the air inside the envelope. the pilot controls the ascent of the balloon.

Explanation:

:)

form calcium hydroxide and hydrogen gas

Ca + 2H₂O ⇒ Ca(OH)₂ +H₂