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Nostrana [21]
3 years ago
7

NEED HELP ASAP !

Chemistry
2 answers:
aleksley [76]3 years ago
7 0

Answer:

A. Elements are pure substances.

Explanation:

Out of all four answers A would be best. Hope this helps.

Rom4ik [11]3 years ago
4 0

Answer:

B

Explanation:

I think all options can define element in one form or another but an element is characterized by the atomic number it has i.e you will know it's Carbon due to it's number of protons, neutrons and/or electrons.

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3 years ago
How many atoms in 7.55 mole of Iron atom
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Adam is doing a science project. He wants to find out how the height of the Sun affects the length of shadows. He will measure t
Akimi4 [234]

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2 years ago
0.446 g of hydrogen gas fills a 5.0 L bag determine the density of hydrogen
Oduvanchick [21]

The density of hydrogen : ρ = 0.0892 g/L

<h3>Further explanation</h3>

Given

mass of Hydrogen : 0.446 g

Volume = 5 L

Required

The density

Solution

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\large {\boxed {\bold {\rho ~ = ~ \frac {m} {V}}}}

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