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slava [35]
3 years ago
5

Luster, conductivity, and malleability are physical properties of metals. What makes these properties different from chemical pr

operties?
A. Physical properties relate to elements rather than compounds.

B. Physical properties appear only after a chemical change occurs.

C. Physical properties can be observed without attempting to change the identity of the substance.

D. Physical properties describe elements in the solid state rather than in the liquid or gas state.
Chemistry
1 answer:
Alla [95]3 years ago
3 0

Answer:

C

Explanation:

A Is false because physical properties can relate to any chemical substance.

B Is false because physical properties are apparent wether a chemical change has occurred or not.

C Is correct because physical properties can be observed without making a chemical change to the substance, chemical properties cause physical properties but a chemical change is not needed to observe a physical property.

D Physical properties describe compounds in all phases of matter.

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For most non-electrolytes dissolved in water, the Van 't Hoff factor is essentially $ 1 $ . For most ionic compounds dissolved in water, the Van 't Hoff factor is equal to the number of discrete ions in a formula unit of the substance.

Which has highest Van t Hoff factor?

The Van't Hoff factor will be highest for

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  B. Magnesium chloride.

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2 years ago
A bar graph of boiling point of milk and water​
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2 years ago
How many grams of KCl is needed to make .75 L of a 1 M solution of KCl?
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Answer:

The answer to your question is 25.9 g of KCl

Explanation:

Data

Grams of KCl = ?

Volume = 0.75 l

Molarity = 1 M

Formula

Molarity = \frac{number of moles}{volume}

Solve for number of moles

Number of moles = Molarity x volume

Substitution

Number of moles = 1 x 0.75

Simplification

Number of moles = 0.75 moles

Molecular mass KCl = 39 + 35.5 = 34.5

Use proportions to find the grams of KCl

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                            x = (0.75 x 34.5) / 1

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If it is 9 am in San Francisco, is it also 9 am in New York? Why or why not?
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