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yulyashka [42]
3 years ago
14

What is a difference between an atom and a molecule.....???? (Plz follow me)​

Chemistry
1 answer:
Misha Larkins [42]3 years ago
8 0

Answer:

An atom is the smallest particle of an element that can take part in a chemical reaction while a molecule is a group of chemically combined atoms.

Explanation:

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Naked lights: lit candles, smoking a cigarette, carrying a box of matches are,<span> prohibited, as they could ignite any methane gas in pockets of the mine.</span>
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3 years ago
21.10g of NaOH and Ba3(OH)2 mixture is dissolved water to prepare 1.0dm³ Solution. To neutralize 25.OO mL of this solution needs
alex41 [277]

From the equation of te reaction, we know that the mass percent  of NaOH in the mixture is 1.4%.

<h3>What is neutralization?</h3>

Neutralization is a reaction that occurs between an acid and a base to yield salt and water only.

In tis case, the reaction of the NaOH and HCl occurs as follows; NaOH + HCl ----> NaCl + H2O

Number of moles of HCl reacted = 15/1000 * 0.5 moldm-³ = 0.0075 moles

Since the reaction is 1:1, 0.0075 moles of NaOH reacted.

Mass of NaOH =  0.0075 moles of NaOH * 40 g/mol = 0.3 g

Percent of NaOH = 0.3 g/21.10g * 100/1 = 1.4%

Learn more about percent concentration: brainly.com/question/202460

8 0
2 years ago
I messed up Èeeeeeeeeeeeeeeeeeeee
Triss [41]

Answer:

o

Explanation:

6 0
2 years ago
HELP ASAP
borishaifa [10]

Answer:

O2

Explanation:

At standard temperature and pressure, oxygen is found as a gas consisting of two oxygen atoms, chemical formula O2.

7 0
3 years ago
Particles can enter the air by
mrs_skeptik [129]

Answer:

Dust

Dirt

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Explanation:

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