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Tema [17]
3 years ago
5

What is the atomic number of an atom?

Chemistry
1 answer:
ludmilkaskok [199]3 years ago
4 0

Answer: The number of protons

Explanation:

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A piece of metal has a mass of 500 g and a volume of 5 cm3. What is its specific gravity?
Vadim26 [7]
I believe the answer is 100. Hope this helps. (ノ◕ヮ◕)ノ*:・゚✧
density = mass/volume.

3 0
3 years ago
There are two different compounds of sulfur and fluorine.
weqwewe [10]
Atomic mass of F: 19.0 g/mol

Atomic mass of S: 32.1 g/mol

1.18 g F = [1.18 g / 19.0 g / mol] = 0.062  mol F

1 g S =  1 g/ 32.1 g/mol = 0.031  mol S

Divide by 0.031

0.062 mol F / 0.031 = 2  mol F

0.031 mol S / 0.031 = 1 mol S

SF2 Then X = 2

Verification:
F2 = 2*19.0 g = 38 g F
S = 32.1 g

36 gF / 32.1 g S = 1.18 g F / g S



7 0
3 years ago
You check the air pressure in your car tires on Monday morning and the pressure
olga55 [171]
In warmer weather gases tend to expand and take up more room, thus increasing pressure. but in colder weather they will condense or contract and take up less space, therefore lowering the pressure of the tire in this situation.
5 0
3 years ago
The methylene chloride solution is filtered through sodium sulfate to:
Vlad [161]

Answer:

C. Dry the methylene chloride by removing water

Explanation:

Anhydrous sodium sulfate is known for its high capacity to absorb water, for this reason it is widely used in laboratories as a drying agent.

Sodium sulfate is a neutral molecule so it cannot be used to neutralize and is very stable, so it is difficult to precipitate organic molecules.

5 0
3 years ago
What term is used to define when a substance reacts quickly with oxygen to produce light and heat?
sergejj [24]

Answer:

I think it's a

Explanation:

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7 0
3 years ago
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