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bulgar [2K]
3 years ago
8

Water freezes at 32 degrees

Chemistry
2 answers:
horsena [70]3 years ago
8 0

Answer:

You should go to Cymath.com it really helped me out

olga55 [171]3 years ago
7 0

Answer:

Fahrenheit

Explanation:

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The atom in a sample of an element must contain nuclei with the same number of?
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The atom in a sample of an element must contain nuclei with the same number of protons. If the protons change in number, then the element will modify as well. 

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Why do we use the term formula unit for ionic compounds instead of the term molecule? Select all that apply.
VladimirAG [237]

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A and C

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3 0
2 years ago
The average speed of oxygen molecules in air is about ____. (1 point) 0 km/h 170 km/h 1700 km/h 17,000 km/h
LenKa [72]

The average speed is calculated using the following formulaspeed = \sqrt{\frac{3kT}{m} }


Where

k = 1.381 X  10^{-23} J / K

T = 298 K [room temperature]

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mass of one mole of oxygen molecules = 32 g / mol

mass of one molecule of oxygen will be = \frac{32}{6.023 X 10^{23} }

mass of one molecule of oxygen will be = 5.31 X 10^{-23} g = 5.31 X 10^{-26} kg

putting values

average speed = \sqrt{\frac{3 X 1.381 X  10^{-23} X 298}{5.31 X 10^{-26} kg} }

Average speed = 482.19 m / s

average speed = 1735.8 km / h

so approx = 1700 km/h

4 0
3 years ago
Read 2 more answers
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