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Answer:

activation energy

Explanation:

it is activation energy becauseThe activation energy for the forward reaction is the amount of

free energy that must be added to go from the energy level of the

reactants to the energy level of the transition state

Bromine is a chemical element with the symbol Br and atomic number 35. It is the third-lightest halogen and is a volatile red-brown liquid at room temperature that evaporates readily to form a similarly coloured vapour.

Answer:

Bromine is a nonmetal in group 7 or group 17, known as the halogens. It has 7 valence electrons.

So the correct answer is "nonmetal, 7 valence electrons"

Answer:

18.375 gm left

Explanation:

1/2 ^4 = 1/16th will be left     (see the '4' representing 4 half lives?)

294 * 1/16 = 18.375 gm

Answer:

in a solution of salt in water, the solute is salt, and solvent is water.

Explanation:

C) salt is the solute, water is the solvent.

Answer:

C

Explanation:

:)

The three macroscopic properties of a gas in terms of the microscopic nature of atoms and the molecules making up the gas is explained by the kinetic theory of gases. The macroscopic properties like pressure, volume and temperature are used to study a gas.

The kinetic theory of gases is a theoretical model which describes the molecular composition of the gas in terms of a large number of submicroscopic particles which include atoms and molecules. Gas is a combination of large number of atoms or molecules.

The kinetic theory of gases considers that the atoms or molecules of a gas are constantly moving point masses which contain a huge inter-particle distance and may undergo perfect elastic collisions.

1. Since the particles are in motion, the average kinetic energy is proportional to the temperature of the gas. So when the inflated balloon is placed in a freezer, the balloon shrinks due to decrease in temperature.

2. When balloon is kept outside in the sun, it will burst due to expansion of gases.

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law of conservation of matter

hope it helps...!!!

The chemical change producing a solid would be [tex]2AgNO_3(aq) + CaBr_2(aq) --- > 2AgBr(s) + Ca(NO_3)_2(aq)[/tex]

They are reactions involving two soluble salts with one of the products being an insoluble salt.

In the reaction below: [tex]2AgNO_3(aq) + CaBr_2(aq) --- > 2AgBr(s) + Ca(NO_3)_2(aq)[/tex]

[tex]AgNO_3[/tex] and [tex]CaBr_2[/tex] are soluble salts while [tex]AgBr[/tex] produced is an insoluble salt. The insoluble salt is a solid.

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Answer: 2AgNO3(aq)+CaBr2(aq)—>2AgBr(s)+Ca(NO3)2(aq)

Explanation:

just did on apex; 2AgNO3(aq)+CaBr2(aq)>2AgBr(s)+Ca(NO3)2(aq)

Answer:

c) Sodium chloride

The amount of energy released by the reaction b. 3.28 x 10(-37)J

A nuclear fission reaction in which the nucleus is divided into numerous small nuclei.

The mass difference is 0.0593

To calculate the energy

[tex]E = \Delta mc^2\\\\c = 3 \times 10^8\;m/s\\\\m = 3.86 \times 10^-^3 \;kg\\[/tex]

Putting the values in the equation

[tex]E = (0.0593) (3 \times 10^8\;m/s)^2 = 5.337 \times 10^1^5[/tex]

Thus, the correct option is b. 3.28 x 10(-37)J

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The unbalanced equations are the equations with different atomic numbers on the sides of the reaction. The unbalanced reaction is Na + Cl₂ → NaCl

Balanced equations are the chemical reaction representation that has an equal number of the atomic number of the same species on the left and the right side of the reaction.

An unbalanced equation between sodium metal and chloride can be shown as:

Na + Cl₂ → NaCl

The equation is unbalanced as the number of chloride ions is more on the reactant side than the product side.

The balanced reaction will be:

2 Na + Cl₂  2NaCl

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Answer:

it would occur when there are two different metals involved.

IUPAC is the universal nomenclature method that is used to give the names of the chemical compounds. The compounds are ethene, propionaldehyde, and propanone.

Functional groups are the particular side groups that are added to the main chain to exhibit a specific property and character to the atom. In the first compound, the presence of the double bond makes it alkene, and the two carbons make the compound ethene.

The second compound has an aldehydic group with suffix -al and three carbon making it propanal, similarly, the third compound is propanone as it has ketone as the functional group and three carbon atoms in the chain.

Therefore, the compounds are ethene, propanal, and propanone.

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Answer:

.0987 moles

Explanation:

Ideal gas law     PV = n RT       R = .082057 L-atm/mol-K

7 ( .347) = n (.082057) (300)       n = .0987 moles

Anders Celsius made the centigrade thermometer.

Answer:

The answer is B. The number of atoms on each side of the reaction arrow must be the same.

Explanation:

Check your work to make certain you have the same number and type of atoms on the reactants side as on the products side

Answer:

To determine whether a substance is an acid or a base, count the hydrogens on each substance before and after the reaction. If the number of hydrogens has decreased that substance is the acid (donates hydrogen ions). If the number of hydrogens has increased that substance is the base (accepts hydrogen ions

Answer: The primary consumers are zooplankton, corals, sponges, Atlantic blue tang, and queen conch.

Explanation:

When an acid reacts in a reaction, it donates hydrogen ion as the only positive ion.

According to Bronsted-Lowry's definition, an acid is a substance that donates hydrogen ions as the only positive ion in reactions.

Following this definition, it can be concluded that when an acid reacts with another substance, it donates one or more hydrogen ions.

A good example is shown in the equation below:

[tex]HCl + KOH --- > KCl + H_2O[/tex]

In the reaction above, HCl donated a hydrogen ion.

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Answer:

a

Explanation:

just took the quiz and this is correct.

Answer:

nonmetals and non metals because valence electrons are shared

Explanation:

please take note that ionic bond only occur between nonmetals and metals whereas covalent bonds only occur between nonmetals and nonmetals

Answer:

400°C

Explanation:

22,000 cal / (0.11 cal/g°C x 500 g) = 400°C

Answer:

400 C degree change

Explanation:

22 000 cal = 500 g * (C) * .11 cal / g-C

C = 22 000 / (500*.11)   = 400 C  degree change

there an A B C D thing?

Explanation:

890

Answer: thrusters

Explanation: got it right

ANSWER

B po yung ans:)

Answer: The temperature of the gas if 65.85g of N2 are placed in 17.5L container with a pressure of 1988 mmHg is 1780. 6° C

Explanation:

The ideal gas law states that the volume, pressure and temperature of the a gas is related to the number of moles.

It is represented thus;

P V = n R T

Parameters :

Pressure, P = 1988 mmHg

Volume, V = 17.5 L

number of moles, n = mass ÷ molar mass

mass of N2 = 65.84g

Molar mass of N2 = 28.02 g/ mol

n = 65.85 ÷ 28.02

n = 2. 350 moles.

Temperature = ?

Universal gas constant, R = 8.314 J/mol. K

Calculations :

T = P V ÷ n R

T = 1988 × 17.5 ÷ 2.350 × 8.314

T = 34790 ÷ 19. 5379

T = 1780. 6 ° C

Thus, the temperature of the gas is 1780. 6 ° C

Answer:

The formula is CI 3 I. Hope this helps!

Answer:

ICl3.

Explanation: trust me

The new pressure of the gas would be 599.03 kilopascals

Boyles postulated that the pressure of any gas would be inversely proportional to its volume if the temperature of the gas remains unchanged.  

Mathematically: P1V1 = P2V2

In this case, P1 = 105 kilopascals, V1 = 2.031 liters, V2 = 0.356 liters.

P2 = P1V1/V2 = 105 x 2.031/0.356 = 599.03 kilopascals

Thus, the new pressure will be 599.03 kilopascals.

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Answer: 599

Explanation:

cuz i got the answer right on the test

The non-contact forces portfolio includes Gravitational force, Magnetic force and Electrostatic force.

Non contact forces are those forces which are applied on any object without any physical interference or contact.

Some non-contact forces are:

Hence Gravitational force, Magnetic force and Electrostatic force are the non-contact forces.

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The pressure of the given moles of propane with the given volume and temperature is 1.024atm.

The Ideal gas law or general gas equation emphasizes on the state or behavior of a hypothetical ideal gas. It states that "the pressure multiplied by volume is equal to moles multiply by the universal gas constant multiply by temperature.

It is expressed as;

PV = nRT

Where P is pressure, V is volume, n is the amount of substance, T is temperature and R is the ideal gas constant ( 0.08206 Latm/molK )

Given the data in the question;

PV = nRT

P = nRT / V

P = ( 13mol × 0.08206Latm/molK × 288K ) / 300L

P = 307.23264Latm / 300L

P = 1.024atm

Therefore, the pressure of the given moles of propane with the given volume and temperature is 1.024atm.

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