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Lostsunrise [7]
2 years ago
13

Which two of the following elements would you expect to be most similar: nitrogen, chlorine, barium, fluorine, and sulfur? 

Chemistry
2 answers:
Anon25 [30]2 years ago
8 0
Nitrogen clorine flourine and sulfur
myrzilka [38]2 years ago
6 0

Answer:

Chlorine and Flourine

Explanation:

It is important to identify the groups in which the elements being to. The elements in each group have the same number of electrons in the outer orbital. Those outer electrons are also called valence electrons.

Since elements in a group have the same number of valence electrons, they behave similarly in chemistry.

Nitrogen - Group 5

Chlorine - Group 7

Barium - Group 2

Flourine - Group 7

Sulphur - Group 6

This means the most similar elements would be flourine and Chlorine because they are both group 7 elements.

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Yakvenalex [24]

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nikitadnepr [17]

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6 0
3 years ago
Please I need help on these 3 questions. Thank You.​
Liula [17]

1.

V = 200 mL (volume)

c = 3 M = 3 mol/L (concentration)

First we convert mL to L:

200 mL = 0.2 L

Then we calculate the moles using the formula: n = V × c = 0.2 L × 3 mol = 0.6 mol

Finally, we just use the molar mass of CaF2 to calculate the actual mass:

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2.

For this question the steps are exactly like the first question.

V = 50mL = 0.05 L

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3.

The steps for this question are the opposite way.

m(K2CO3) = 250 g

molar mass = 138 g/mol

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