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3 years ago

Describe the characteristics that identify a sample of matter as a substance.

Chemistry

2 answers:

madreJ [45]3 years ago

7 0

Answer:

1.Extensive property

2.Intensive property

Explanation:

Matter: It can be anything which occupy space and has mass.

Example:Wood , stone etc.

Substance:It is a matter .If matter has specific composition and chemical properties .Then , the matter is called substance.

For example: elements such as mercury, sodium etc.

All substance can be matter but all matter can not be substance.

Substance can be identified by two physical properties:

1.Extensive property

2.Intensive property

1.Extensive property: That property which depend on the amount of substance such as mass, length , volume etc.

Intensive property: That property which does not depend on the amount of substance such as density, boiling point, melting point etc.

By observing these properties we can identify a sample of matter as substance.

tankabanditka [31]3 years ago

4 0

Answer:

matter is anything that has mass and takes up space so it could be heavy light small or big

Explanation:

whatever describes mass and space

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galina1969 [7]

-number of electrons
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2 years ago

When two compounds are made up of the same number and kind of atoms, but differ in their molecular structure they are known as?

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3 years ago

Consider the equilibrium reaction and its equilibrium constant expression. Br 2 ( g ) + 2 NO ( g ) − ⇀ ↽ − 2 NOBr ( g ) K = [ NO

zavuch27 [327]

Answer:

$K_2=\frac{[NOBr]^4_{eq}}{[NO]^4_{eq}[Br]^2_{eq}}$

Explanation:

Hello,

In this case, for the equilibrium condition, the equilibrium constant is defined via the law of mass action, which states that the division between the concentrations of the products over the concentration of the reactants at equilibrium equals the equilibrium constant, for the given reaction:

$2 Br_2 ( g ) + 4 NO ( g ) \rightleftharpoons 4NOBr ( g )$

The suitable equilibrium constant turns out:

$K_2=\frac{[NOBr]^4_{eq}}{[NO]^4_{eq}[Br]^2_{eq}}$

Or in terms of the initial equilibrium constant:

$K_2=K_1^2$

Since the second reaction is a doubled version of the first one.

Best regards.

5 0

3 years ago

C time

lesya692 [45]

Answer:

B. Spring balance - a device used for measuring the weight or force of gravity acting on an object.

Explanation:

A Force is any interaction that changes the motion or position of an obkpjectbthatbit is interacting with. Whenever there is an interaction between two objects, there is a force exerted by each of the objects on one themselves.

Forces are generally divided into contact forces and non-contact over field forces.

In contact forces, the two objects physically in contact with each other. Examples of contact forces are push or pull forces, frictional forces, tensional forces, spring forces, etc.

Non-contact forces are forces in which the two objects interacting do no need to be physically in contact with one another. Examples include, gravitational forces, magnetic forces, electrical forces, etc.

Instruments used in measuring forces are known as force gauges.

From the instruments listed above:

A. A ruler is an instrument used in measuring length

B. Spring balance is a device used for measuring the weight or force of gravity acting on an object.

C. A thermometer is an instrument used in measuring temperature

D. A windbvane is an instrument used in measuring wind direction.

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3 years ago

While 1 gram of fat provides 9 calories, 1 gram of glucose provides 4 calories. Why is that?

seropon [69]

Answer:

fat always has more calories than glucose does

Explanation:

hope hope this helps!

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3 years ago