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kenny6666 [7]
3 years ago
14

Describe the observation Robert Brown made.​

Chemistry
2 answers:
12345 [234]3 years ago
3 0

Answer:

In 1827, Brown observed, using a microscope, that small particles ejected from pollen grains suspended in water executed a kind of continuous and jittery movement, this was named “Brownian motion”. ... This random movement of particles suspended in a fluid is now called after him.

Explanation:

HOPE this helps :)

gladu [14]3 years ago
3 0

Answer:

In 1827, Brown observed, using a microscope, that small particles ejected from pollen grains suspended in water executed a kind of continuous and jittery movement, this was named “Brownian motion.This random movement of particles suspended in a fluid is now called after him.

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A compound is composed of 13% carbon, 4.3% hydrogen, 30.4% nitrogen, and 52.2% oxygen. The mystery compound has a molar mass of
vredina [299]

Answer:

C₂H₈N₄O₆ is the molecular formula for the compound

Explanation:

Data from the problem:

13 g of C in 100 g of compound

4.3 g of H in 100 g of compound

30.4 g of N in 100 g of compound

52.2 g of O in 100 g of compound

Firstly we determine, the mass of each in 184 g of compound, which is 1 mol

(13 g / 100 g) . 184 g  = 24 g C

(4.3 g  / 100 g) . 184 g  = 7.91 g H ≅ 8 g H

(30.4 g / 100 g) . 184 g  = 56 g N

(52.2 g  / 100 g) . 184 g  = 96 g O

And now, we divide the mass by the molar mass of each to determine the moles:

24 g C / 12 g/mol = 2 mol C

8g H / 1 g/mol = 8 mol H

56 g N / 14 g/mol = 4 mol N

96 g O / 16 g/mol = 6 mol O

So the molecular formula of the compound is C₂H₈N₄O₆

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3 years ago
In two or more complete sentences, compare petroleum to natural gas. How are they similar? How are they different?
balandron [24]
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The assertion is definitely wrong. Corrosion actually means decomposing or rusting of metals. So, corrosion is a harmful process for metals. But, your reason is correct. Galvanising, which means deposition of a layer of zinc on iron to prevent from rusting, is a very beneficial process to prevent metals from corrosion. In some cases, electroplating also helps to prevent from corrosion.

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Answer:

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Interna makes stuff stay on motion or in place.

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