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emmainna [20.7K]
2 years ago
5

True or False: A property is a way to

Chemistry
1 answer:
kenny6666 [7]2 years ago
5 0

Answer:

True

Explanation:

Here is an example: chemical properties include flammability, toxicity, acidity, reactivity. we observe the changes of these properties. Therefore, It's true.

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When 551. mg of a certain molecular compound X are dissolved in 100 g of benzonitrile (CH,CN), the freezing point of the solutio
arsen [322]

Answer:

1.12g/mol

Explanation:

The freezing point depression of a solvent for the addition of a solute follows the equation:

ΔT = Kf*m*i

<em>Where ΔT is change in temperature (Benzonitrile freezing point: -12.82°C; Freezing point solution: 13.4°C)</em>

<em>ΔT = 13.4°C - (-12.82) = 26.22°C</em>

<em>m is molality of the solution</em>

<em>Kf is freezing point depression constant of benzonitrile (5.35°Ckgmol⁻¹)</em>

<em>And i is Van't Hoff factor (1 for all solutes in benzonitrile)</em>

Replacing:

26.22°C = 5.35°Ckgmol⁻¹*m*1

4.90mol/kg = molality of the compound X

As the mass of the solvent is 100g = 0.100kg:

4.9mol/kg * 0.100kg = 0.490moles

There are 0.490 moles of X in 551mg = 0.551g, the molar mass (Ratio of grams and moles) is:

0.551g / 0.490mol

= 1.12g/mol

<em>This result has no sense but is the result by using the freezing point of the solution = 13.4°C. Has more sense a value of -13.4°C.</em>

5 0
2 years ago
How many sigma and pi bonds, respectively, are in the molecule below? ch3ch2chchch3?
klio [65]
14 sigma bonds, 1 pi bond
8 0
3 years ago
How many molecules of water or in 1 liter (56 mol)?
dem82 [27]

1 mol of any particles = 6.02*10²³ particles


56 mol*6.02*10²³ molecules of water/1 mol =3.37*10²⁵

6 0
3 years ago
Study of gene structure and function
gregori [183]

I believe the answer would be b

7 0
3 years ago
Is a compound microscope a complex microscope??? Give your reason why it is :P
IrinaK [193]

Answer:

no

Explanation:

A compound is a material formed by chemically bonding two or more chemical elments.

7 0
3 years ago
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