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Viktor [21]
3 years ago
10

What's the Molar Mass of O2? O 16.0 g/mole o 32.0 g/mole 1.0 g/mole O 2.0 g/mole

Chemistry
2 answers:
stiks02 [169]3 years ago
5 0
............:.................................

Elza [17]3 years ago
5 0
32.0 g/mol! Take the atomic mass off of the periodic table (16) and multiply by 2 since there are two oxygen atoms. So your answer is 32.0 g/mol.
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A piece of unknown metal weighs 348g. When the metal piece absorbs 6.64kj of heat , its temperature increases from 24.4C to 43.6
Morgarella [4.7K]

Answer:

This metal could be the aluminium with a specific heat of H = 993 \frac{J}{kgC}

Explanation:

A pie of unknown metal presents a mass (M) of 348 g. This metal is heated using energy (E) of 6.64 kJ and the temperature increases from T1 =24.4 to T2 =43.6°C. We can calculate the specific heat (H) of this metal as follows

H = \frac{E}{M*(T2-T1)}

We can replace previously presented data in this equation. After simplifying and converting to adequated units, we found that

H = \frac{6640 J}{0.348 Kg*(43.6-24.4) C} =\frac{6640 J}{6.686 KgC}

Finally, the specific heat of this metal is

H = 993 \frac{J}{kgC}

The aluminium could be the metal, its specific heat is similar to that found in this problem.

Finally,  we can conclude that this metal could be the aluminium with a specific heat of H = 993 \frac{J}{kgC}

7 0
3 years ago
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muminat

Answer: sodium sulfite

Explanation:

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Ice cream is made by freezing a liquid mixture that, as a first approximation, can be considered a solution of sucrose in water.
hjlf

Answer:

Freezing point is -2.81°C

Explanation:

34g/342gmol^-1 = 0.0994mol

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◇T = -i × m ×Kf

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i= Vant Hoff factor

m = molarity

Kf = freezing content = 1.

860kgmol^-1

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2 years ago
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