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pickupchik [31]
3 years ago
12

In which set of elements would all members be expected to have very similar chemical properties?A) O, S, SeB) S, Se, SiC) N, O,

FD) Ne, Na, MgE) Na, Mg, K
Chemistry
1 answer:
Artist 52 [7]3 years ago
6 0

Answer:

A. O, S, Se

Explanation:

If you look up Oxygen (O), Sulfur (S) and Selenium (Se) in the periodic table, you will see that these three fall under the same column. In the periodic table, elements are arranged in rows and columns. Columns are called groups. The elements that fall under the same group share similar chemical properties.

The elements given above are all in Group VIA or group 16.

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How many liters of nitrogen gas are needed to make 25 mol of nitrogen trifluoride
ikadub [295]
The reaction between N₂ and F₂ gives Nitrogen trifluoride as the product. The balanced equation is;

N₂ + 3F₂ → 2NF₃

The stoichiometric ratio between N₂ and NF₃ is 1 : 2
Hence, 
  moles of N₂ / moles of F₂ = 1 / 2
  moles of N₂ / 25 mol        =  0.5
           moles of N₂            =  0.5 x 25 mol = 12.5 mol
 
Hence N₂ moles needed  = 12.5 mol

At STP (273 K and 1 atm) 1 mol of gas = 22.4 L

Hence needed N₂ volume = 22.4 L mol⁻¹ x 12.5 mol
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6 0
3 years ago
Balance the following reaction:
miv72 [106K]

 The balanced reaction is   as below

3A₂B  + 2DC₃→ 6 AC  + D₂B₃


The number that must be  to the left of AC   is 6

 Explanation

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  • Therefore the equation above is balance  since  it obey the law of mass conservation.
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Explain how sodium and calcium react with water. explain with equations
34kurt

Reaction of sodium with water

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2Na(s) + 2H2O → 2NaOH(aq) + H2(g)

4 0
2 years ago
So its not A so its B C or D plz help
Rainbow [258]

Answer:

the answer is B

hope this helped!

3 0
3 years ago
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