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2 years ago

Is density a chemical or physical property of a substance?

Chemistry

1 answer:

pychu [463]2 years ago

8 0

Answer:

A physical property is a characteristic of a substance that can be observed or measured without changing the identity of the substance. Physical properties include color, density, hardness, and melting and boiling points. A chemical property describes the ability of a substance to undergo a specific chemical change.

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The following data was collected when a reaction was performed experimentally in the laboratory.

REY [17]

Answer:

The answer to your question is 3 moles of AlCl₃

Explanation:

Process

1.- Write and balance the equation

Al(NO₃)₃ + 3NaCl ⇒ 3NaNO₃ + AlCl₃

2.- Determine the limiting reactant

Theoretical proportion 1 mol Al(NO₃)₃ : 3 moles of NaCl

Experimental proportion 4 moles Al(NO₃)₃ : 9 moles NaCl

From these values, we determine that the limiting reactant is NaCl because the number of moles increases three times and the number of moles of Al(NO₃)₃ increases four times.

3.- Determine the amount of AlCl₃ using proportions

3 moles of NaCl --------------- 1 mol of AlCl₃

9 moles of NaCl ---------------- x

x = (9 x 1) / 3

x = 9 /3

x = 3 moles

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3 years ago

1) What is air pressure? (4 Points)

Nataly [62]

1) What is air pressure? (Answer: Atmospheric pressure, sometimes also called barometric pressure, is the pressure within the atmosphere of Earth.)

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3) How does air pressure change? (Answer: Millibar values used in meteorology range from about 100 to 1050. At sea level, standard air pressure in millibars is 1013.2. Weather maps showing the pressure at the surface are drawn using millibars. ... This change in pressure is caused by changes in air density, and air density is related to temperature.)

4) Why is cooler, drier air related to High Pressure? (Answer: This is due to density differences between the two air masses. Since stronger high-pressure systems contain cooler or drier air, the air mass is denser and flows towards areas that are warm or moist, which are in the vicinity of low pressure areas in advance of their associated cold fronts.)

5) Why is warm, moister air related to Low Pressure? (Answer: When air warms, its molecules scatter. The air becomes lighter and rises.)

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3 years ago

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What is the purpose of graphics in scientific articles

kow [346]

Answer:

Graphics can sometimes convey more information in a brief amount of space than an author can explain in a paragraph.

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3 years ago

True or False: The Ring of Fire is a section along the Atlantic Ocean where you have active volcanoes

Romashka [77]

False because the Atlantic Ocean dose not have active volcanoes besides that’s a ocean so no

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2 years ago

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When water vapor changes to a liquid what is it called

Mademuasel [1]

Answer:

$hello \: your \: answer \: is \: here.$

Explanation:

<h2>Condensation is the change of water from its gaseous form (water vapor) into liquid water. Condensation generally occurs in the atmosphere when warm air rises, cools and looses its capacity to hold water vapor. As a result, excess water vapor condenses to form cloud droplets.</h2>

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5 0

3 years ago

Is density a chemical or physical property of a substance￼?

Is density a chemical or physical property of a substance?