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3 years ago

blank is the energy required for a chemical reaction to take place, and blank is the energy associated with every substance.

Chemistry

2 answers:

Korolek [52]3 years ago

5 0

Heat is the first one...and the secound one is kinetic

Pie3 years ago

5 0

Answer:

1) Activation energy

2) Internal energy

Explanation:

A reaction takes place is the reactants have a certain minimum amount of energy known as threshold energy.

All the reactants have some inherent energy known as internal energy, which corresponds to the potential, kinetic, vibrational, roational etc energy of the substance.

The rest amount of energy required by the reactants is known as activation energy. This the minimum extra amount of energy required to reach or cross the threshold energy level.

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What is the difference between atomic mass, relative atomic mass and average atomic mass

vesna_86 [32]

$\bold{\huge{\underline{\purple{ Answer }}}}$

Difference between Atomic mass, relative atomic mass and average atomic mass :-

<h3>Atomic Mass :-</h3>

Atomic mass is the mass of neutrons and protons present in the nucleus of an atom .
It is always calculated for a single element and having direct value
For isotopes also, the atomic mass is calculated separately . Example :- Carbon 12 , carbon 13 and carbon 14 have different atomic mass. 
The SI unit of Atomic mass is " u" and "amu"

<h3>Relative Atomic mass :-</h3>

Relative atomic mass is mean mass of the atoms of an element which is compared to the 1/12th mass of carbon - 12 .
Carbon - 12 is taken as a relative when we calculate the relative atomic mass of any element
For calculating relative atomic mass, we need to know the masses, percentage and abundance of all types of elements
Relative atomic mass is a dimension less quantity

<h3>Average Atomic Mass :-</h3>

Average atomic mass is the average mass of an atoms of a particular element by considering it's isotopes
While we calculate average atomic mass is a standardized number. Whereas, Average atomic mass sometimes varies geologically .
It also includes percentage, abundance and masses of given element .
In average atomic mass, We do not compare mean value with the 1/12 mass of carbon - 12
The unit of Average atomic mass is "Amu" or " u " .

5 0

2 years ago

Which feature is used to classify galaxies? age color shape size

kondor19780726 [428]

Answer:

C. Shape

Explanation:

Did the quiz! & galaxies are classified by shapes called "elliptical, spirial, & irregular"

Good luck :)

8 0

3 years ago

PLEASE HELP!!!!! I need help with this question!

Ivahew [28]

Answer:

Exothermic Reaction

Explanation:

Its a combustion reaction and they are always exothermic in nature.

8 0

3 years ago

How many moles are in 54.0 grams of Silver?

Lelechka [254]

54g ag *(108mol ag/1 g ag) =5832mol ag

4 0

3 years ago

1: The atomic number of an atom is equivalent to which of the following?

IrinaVladis [17]

I think the correct answer among the choices presented above is option C. The atomic number of an atom is equivalent to the number of protons in the nucleus. For a neutral atom, it is also the number of electrons since in a neutral atom protons and electrons are present in equal number.

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3 years ago