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algol [13]
3 years ago
12

What does NA means in chemistry form

Chemistry
2 answers:
Amanda [17]3 years ago
6 0
It’s is sodium, the 11th element on the periodic table.
miss Akunina [59]3 years ago
4 0
I hope that this help you.

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Write the balanced equation for the burning of nonane, c9h20, in air.
Ivanshal [37]
C9H20 + 14O2 --> 9CO2 + 10H2O
3 0
3 years ago
How is the life cycle of a star similar to that of a human?
Arturiano [62]

Answer: They both have stages where they are born and die which is in the main sequence and supernova and in a human they are born in a womb and die of old age.

Explanation:

6 0
2 years ago
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Which statement applies to electronegativity?
densk [106]

<u>Answer:</u> The correct answer is Option A.

<u>Explanation:</u>

Electronegativity is defined as the tendency of an atom to attract the shared pair of electrons towards itself whenever a bond is formed.

This property increases as we move from left to right across a period because the number of charge on the nucleus gets increased and electrons are attracted more towards the nucleus.

This property decreases as we move from top to bottom in a group because the electrons get add up in the new shells which make them further away from the nucleus.

Thus, the correct answer is Option A.

7 0
3 years ago
What is the molality of an aqueous solution containing FeCl3 (MM = 162.2 g/mol) with a mole fraction of FeCl3 of 0.15?
Natalka [10]

Answer:

10 m

Explanation:

The mole fraction of FeCl₃ of 0.15, that is, per mole of solution, there are 0.15 moles of FeCl₃ and 1 - 0.15 = 0.85 moles of water.

The molar mass of water is 18.02 g/mol. The mass corresponding to 0.85 moles is:

0.85 mol × 18.02 g/mol = 15 g = 0.015 kg

The molality of FeCl₃ is:

m = moles of solute / kilogram of solvent

m = 0.15 mol / 0.015 kg

m = 10 m

3 0
3 years ago
The density of an object is
uysha [10]

Answer:

Density is a measure of mass per unit of volume. Density is a measure of mass per volume. The average density of an object equals its total mass divided by its total volume.

I hope it helps.

Have a great day.

5 0
3 years ago
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