3 years ago

Why is melting point considered a physical property

1 answer:

6 0

Answer:

Because you can physically see the object melting when it comes to the melting point. The objects texture, color, temperature, shape, and state of matter (solid, liquid, gas) are possibly changing.

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What is the pressure of 2.20 mol of a gas stored in a 4.5 L container at a temperature of 170 K? (Use PV=nRT and R = 8.314 L∙kPa

algol13

Answer:

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2 years ago

Write some sentences about Respiration in your own words

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Answer:

Reluctantly she pulled away, her pulse and respiration in a race.

Its function is less that of respiration than of FIG

Terrestrial plants have a gaseous interchange of oxygen and carbon dioxide which is necessary for respiration and feeding.

The least wind raises clouds of fine dust, which fill the air, render it so opaque as to obscure the noonday sun, and make respiration difficult.

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1 year ago

Chose the mathematical formula expressing work.

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W = AB x F x Cos < AB, F
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2 years ago

Name the following bases<br> -Ba(OH)2<br> - Ca(OH)2<br> -RbOH

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$Ba(OH)_2\rightarrow \bold{\green{Barium\: hydroxide}}$

$Ca(OH)_2\rightarrow \bold{\red{Calcium\: hydroxide}}$

$RbOH \rightarrow \bold{\blue{Rubidium \:hydroxide}}$

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2 years ago

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Sodium nitrate and lead (ii) acetate express your answer as a chemical equation. identify all of the phases in your answer. ente

ICE Princess25 [194]

Answer: $2NaNO_3(aq)+(CH_3COO)_2Pb(aq)\rightarrow 2CH_3COONa(aq)+Pb(NO_3)_2(aq)$

Explanation: A double displacement reaction is one in which exchange of ions take place.

The compounds which are soluble in water are designated by symbol (aq) and those which are insoluble in water and remain in solid form are represented by (s) after their chemical formulas.

Thus the exchange of ions take place and all the compounds are soluble so the chemical formulas are followed by the symbol (aq).

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3 years ago

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