How do you decide whether an observed property of matter is a physical or a chemical property?

Answers

Answer 1

Answer: By the object's composition and the acting agent to which factors the change of the substance or entity.
The effect of physical property of matter on the object or substance can be better identified when the object doesn't change in composition or in nature. Unlike chemical property which has changed in its composition and atomic structure that was caused by chemical change or reaction due to an agent. Physical property is identified thru physical reactions or changes that has never changed the object in an atomic level, like cutting paper into smaller sizes. The aforementioned example illustrates physical proerty but being cut into smaller buts without changing the object from paper to any other substance, thus, its structure remain and its still called paper regardless of size, mass and texture.

Answer 2

Answer: Because a physical property doesn't change the substance if you apply it. A chemical property will change its matter into a new substance.
Example of physical : cutting, because it will grow back to how it was
Example of chemical : flammability because if you burn it.....it wont go back to its original form.

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Predict what kind of energy process happens when Lye, NaOH(s) is put in water and the water gets hot

Answers

Answer:

Exergonic process

Explanation:

A reaction in which the change in free energy is negative is what is termed an exergonic reaction. Energy is released into the surrounding medium in this type of reaction.

When pellets of NaoH is dissolved in water, energy in the form of heat is released into the medium and the solution gets hot.

Hence, the dissolution of NaoH in water is said to be exergonic.

what happens is that the sodium solution when put in water reacts and creates thermal energy .

a cylinder of oxygen gas is cooled from 300K to 150K by what factor does the average kinetic energy of the oxygen molecules in the cylinder decrease

Answers

Answer:

The factor by which the average kinetic energy of the oxygen molecules in the cylinder decreases is '0.5'.

Explanation:

Average kinetic energy is defined as the average of the kinetic energies of all the particles present in a system. It is determined by the equation:

$K=(3RT)/(2N_A)$

where,

K = Average kinetic energy

R = Gas constant

T = Temperature of the system

$N_A$ = Avogadro's number

Average kinetic energy of oxygen gas molecule at 300 K.

$K.E=(3R* 300 K)/(2N_A)$ ..[1]

Average kinetic energy of oxygen gas molecule at 150 K.

$K.E'=(3R* 150 K)/(2N_A)$ ..[2]

[1] ÷ [2]

$(K.E)/(K.E')=((3R* 300 K)/(2N_A))/((3R* 150 K)/(2N_A))=(300)/(150)=2$

$K.E'=0.5* K.E$

The factor by which the average kinetic energy of the oxygen molecules in the cylinder decreases is '0.5'.

Temperature is a measure of average kinetic energy thus absolute temperature is proportional to average kinetic energy. It should be half: same factor as the temperature.

Astrophysics and planetar Astrophysics and planetary science are considered subspecialties of y science are considered subspecialties of

Answers

Astrophysics and planetar Astrophysics and planetary science are considered subspecialties of Astronomy. Astronomy is the study of the sun, moon, planets, stars, comets, gas, galaxies, dust and other bodies and phenomena.

Note

Astrophysics - properties of space

Planetary Science - planet formation

I hope this helps, Regards.

What is the first element of the periodic table?

Answers

The first element of the periodic table is Hydrogen. It is the only element that can achieve being stable without a full octet (8 valence electrons).

Answer: Hydrogen

Hyrdrogen.
I hope this helps;)

Petroleum and coal can be mined from the continental shelf. t/f

Answers

True

Petroleum and coal can be mined from the continental shelf. Hot magma from inside the Earth seeps out from the crevices in the mid-ocean ridge. There is speculation regarding whether this is a cost-effective technique. Fossil fuels and mineral deposits can be located all throughout the continental shelf and also in some of the deepest depths of the ocean.

Answer:The given statement is true.

Explanation:

Continental Shelf: A portion of continent submerged under the relative shallow ocean water.Most of the gradually slopes down in to the water.

The relatively flat surface and shallow water makes it fitr place to harvest sea food, non renewable energy resources like : coal, petroleum .

which atomic particle determines the chemical behavior of an atom the nucleus, neutron, electron, proton or none of these

Answers

The chemical behavior of an atoms is determine by the formation or destruction of chemical bonds. The chemical bonds are the result of the interaction of the electrons of the atoms. Chemical properties of the atoms are given by how attached are the shell electrons attached to the nucleus and how they interact with other atoms. Chemical changes are the result of exchange valence electrons of the atoms. So, the answer is the atomic particle that determines the chemical behavior of an atom is the electron, because it is the particle that is active in chemical bonding.

The electron is the primary atomic particle that determines an atom's chemical behaviour.

Electrons are negatively charged particles that form electron shells or energy levels around an atom's nucleus. They are engaged in the production and breaking of chemical bonds, hence they play an important part in chemical reactions.

The quantity and configuration of electrons in an atom's outermost energy level (valence electrons) are very significant in determining the chemical characteristics of the atom. Because of the identical number of valence electrons, elements in the same group or column of the periodic table frequently show similar chemical behaviour.

To know more about electron, here:

brainly.com/question/12001116

#SPJ6

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