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3 years ago

What is the difference between physical and chemical properties

Chemistry

1 answer:

Finger [1]3 years ago

4 0

Answer:

Physical properties are concerned with physical changes while chemical properties are concerned with chemical changes

Explanation:

The properties of a particular substance could either be physical or chemical. To differentiate these adequately, we have to look at it from the angle of physical and chemical changes.

While physical properties are associated with physical changes, chemical properties are basically concerned with chemical changes. A physical change is reversible while a chemical change is not.

Thus, it is safe to say that while physical properties are concerned with physical changes, chemical properties are concerned with chemical changes.

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Arte-miy333 [17]

Answer:

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Explanation:

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6 0

3 years ago

A compound is found to contain 42.88 % carbon and 57.12 % oxygen by weight. To answer the questions, enter the elements in the o

Ipatiy [6.2K]

Answer:

The empirical formule is CO

Explanation:

Step 1: Data given

Suppose the mass of a compound is 100 grams

Suppose the compound contains:

42.88 % C = 42.88 grams C

57.12 % O = 57.12 grams O

Molar mass C = 12.01 g/mol

Molar mass O = 16.0 g/mol

Step 2: Calculate moles

Moles = mass / molar mass

Moles C = mass C / molar mass C

Moles C = 42.88 grams / 12.01 g/mol

Moles C = 3.57 moles

Moles O = 57.12 grams / 16.0 g/mol

Moles O = 3.57 moles

Step 3: Calculate the mol ratio

We divide by the smallest amount of moles

C: 3.57 moles / 3.57 moles = 1

O: 3.57 moles / 3.57 moles = 1

The empirical formule is CO

3 0

2 years ago

A motor “runs” when what is produced by a spinning magnet ?

alex41 [277]

Answer:

electrical energy

Explanation:

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7 0

3 years ago

Which of the following pairs of aqueous solutions will form a precipitate when mixed?

wolverine [178]

I think the correct answer from the choices listed above is option B. The reactants calcium sulfide and sodium sulfate will react and form a precipitate which is calcium sulfate since it is only slightly soluble in aqueous solution. Hope this answers the question.

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3 years ago

100!!!POINTS PLZ HELP Explain (on the molecular level) what pumping a tire with air will do to

Bas_tet [7]

Answer:

Gases are easily compressed. We can see evidence of this in Table 1 in Thermal Expansion of Solids and Liquids, where you will note that gases have the largest coefficients of volume expansion. The large coefficients mean that gases expand and contract very rapidly with temperature changes. In addition, you will note that most gases expand at the same rate, or have the same β. This raises the question as to why gases should all act in nearly the same way, when liquids and solids have widely varying expansion rates.

The answer lies in the large separation of atoms and molecules in gases, compared to their sizes, as illustrated in Figure 2. Because atoms and molecules have large separations, forces between them can be ignored, except when they collide with each other during collisions. The motion of atoms and molecules (at temperatures well above the boiling temperature) is fast, such that the gas occupies all of the accessible volume and the expansion of gases is rapid. In contrast, in liquids and solids, atoms and molecules are closer together and are quite sensitive to the forces between them.

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3 years ago