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lions [1.4K]
3 years ago
13

What is halogens?why are they called very active non metals?

Chemistry
1 answer:
grin007 [14]3 years ago
6 0
Any of the elements occupying group 17 on the periodic table. They form highly acidic compounds with hydrogen.


The elements are:
Fluorine (F)
Chlorine (Cl)
Bromine (Br)
Iodine (I)
Astatine (At)
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1. You find a separatory funnel set up in a fume hood. There are clearly two visible layers. Describe a method you could use to
hoa [83]

Answer:

You find a separatory funnel set up in a fume hood. There are clearly two visible layers. Describe a method you could use to determine which layer is the aqueous layer.

Explanation:

In the separating funnel, the liquid with less density exists at the top layer and the liquid with greater density will exist at the bottom layer.

To identify the aqueous layer, add a bit of water to the separating funnel.

Then, observe where the water will go and mix.

If it mixes with the bottom layer, then the bottom layer is the aqueous layer.

If water mixes with the top layer, then top layer is the aqueous layer.

3 0
3 years ago
Use this reaction: 3NaOH + H3PO4--> Na3PO4 + 3H20
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The balanced reaction would be as follows:

<span>3NaOH + H3PO4 --> Na3PO4 + 3H20

We are given the concentration and the amount of the reactants to be used. We use these values for the calculations as follows:

</span><span>How many mL of .225 M NaOH will react with 4.568g H3PO4? 

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8 0
3 years ago
Calculate the mechanical advantage of a lever work five N of the input force is needed to move a 10 N box using a lever
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Answer:

2

Explanation:

Mechanical Advantage (M.A) = Load/Effort....................................... (1)

Load = 10 N

Effort =  5 N

So substituting into equation (1), we have :

M.A =  10 N/5 N

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3 years ago
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xxTIMURxx [149]

Answer:

I think radiaction

Explanation:

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Examine bohr's model about atoms?
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Here, I took this straight from the notes I took back when I learned this. If you need any more clarification, just say so.

<span>Bohr: Planetary model<span>Theorized that E- travel in specific orbits around the nucleus.The further an E- is from the nucleus, the higher its “energy.”The number of E- in the outermost orbital<span> determines the reactivity of an element.</span>
Bohr's model was a nucleus with concentric circles going around it representing the energy levels (where the electrons are in the atom). He was the first to demonstrate that the electrons in an atom orbit the nucleus, rather than stay in a consistent position. Google "Bohr Atomic Model" if you need any visual clarification. Hope I helped, and let me know if you need anything else!</span></span>
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3 years ago
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