2 years ago

As ice melts from a solid to a liquid, A) entropy increase

Chemistry

1 answer:

Dovator [93]2 years ago

4 0

That answer is false

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A balloon is filled with 3.8 l of helium gas at stp. approximately how many moles of helium are contained in the balloon?

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The two naturally occurring isotopes of antimony, 121Sb (57.21 percent) and 123Sb (42.79 percent), have masses of 120.904 and 12

Alex

Answer:

The correct answer is option c.

Explanation:

Formula used to determine an average atomic mass :

$\text{Average atomic mass }=\sum_{i=1}^n\text{(Atomic mass of an isotopes)}_i\times \text{(Fractional abundance})_i$

Mass of isotope Sb-121 = 120.904 amu

Fractional abundance of Sb-121 = 57.21% = 0.5721

Mass of isotope Sb-123 = 122.904 amu

Fractional abundance of Sb-123 = 42.79% = 0.4279

Average atomic mass of Sb:

$120.904 amu\times 0.5721+ 122.904 amu\times 0.4279=121.7598 amu \approx 121.76 amu$

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The name of an alkyl group that contains THREE carbon atoms is____

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The answer is "Propyl"

Explanation:

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Classify the items based on whether they are or are not matter.

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Answer:

Matter:

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Not matter:

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Matter is something that has mass and volume. Happiness is just a feeling, it doesn't exist in 3d world. Sound is a wave or just the movement of matter (particles of matter). Others have masses and volumes.

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