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leonid [27]
3 years ago
8

Five students had to answer the question how are elements arranged in a periodic table

Chemistry
1 answer:
attashe74 [19]3 years ago
8 0
As the atomic number of an element increases, so does the atomic weight(mass). It should be the first option.
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Quick electron emissions are called
vivado [14]

Answer:

<u>Beta</u><u> </u><u>decay</u>

Quick electron emissions are called <u>beta</u><u> </u><u>decay</u>

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3 years ago
Select the reagents you would use to synthesize the compounds below from benzene. Use the minimum number of steps. No more than
jekas [21]

Answer:

Explanation:

Using the necessary reagents to faciliate the synthesis of the organic compounds as shown in the attached file.

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3 years ago
How many moles of KBr are present in 500 ml of a 0.8 M KBr solution?
faltersainse [42]

Answer:

2) 0.4 mol

Explanation:

Step 1: Given data

  • Volume of the solution (V): 500 mL
  • Molar concentration of the solution (M): 0.8 M = 0.8 mol/L

Step 2: Convert "V" to L

We will use the conversion factor 1 L = 1000 mL.

500 mL × 1 L/1000 mL = 0.500 L

Step 3: Calculate the moles of KBr (solute)

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M = n/V

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n = 0.8 mol/L × 0.500 L = 0.4 mol

4 0
3 years ago
What is acid according to arhenias concept?
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Explain why the electron configuration of 2-3-1 represents an atom in an excited state.
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