2 years ago

Coal like graphite is composed of carbon. Unlike graphite, coal is formed by decayed, once living matter. Is it a mineral?

1 answer:

3 0

Coal is not a mineral. It's not a mineral because minerals are inorganic. Coal is organic because it comes from decayed living matter.

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densk [106]

The answer would be b) GAS

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3 years ago

Musya8 [376]

Its like weight but not. mass is the amount of matter in a substance.

6 0

3 years ago

AVprozaik [17]

Answer:

Molar mass = 103.0 g/mol,

0.728 mol NaBr

Explanation:

Molar mass M(NaBr) = M(Na) + M(Br) = 23.0 + 80.0 = 103.0 g/mol

75.0 g NaBr * 1 mol NaBr/103.0 g NaBr=0.728 mol NaBr

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2 years ago

sveticcg [70]

Answer:

pH ( potential Hydrogen ) is a negative logarithm of molar concentration of hydrogen ions.

$pH = - log[H {}^{ + } ]$

therefore:

$pH = - log(2.1 \times {10}^{ - 6} ) \\ { \boxed{pH = 5.68}}$

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2 years ago

stealth61 [152]

Is this math or chemistry....:

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2 years ago