3 years ago

Use the periodic table to write the electron configuration of selenium (Se).

Chemistry

2 answers:

kolbaska11 [484]3 years ago

5 0

Answer:

1s^22s^22p^63s^23p^64s^23d^104p^4

Fantom [35]3 years ago

4 0

Answer:

1s2 2s2 2p6 3s2 3p6 4s2 3d10 p4

Explanation:

PLATO correct

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Hydrofluorocarbons (HFC) have replaced chlorofluorocarbon gases (CFC) in refrigerators.

g100num [7]

Answer: 98.36g/mol

Explanation:Please see attachment for explanation

7 0

4 years ago

How many atoms are in a single molecule of water H2O

Blababa [14]

There are 3 atoms in total. Two come from Hydrogen hence the H2. The third comes from the single Oxygen (O). Hope this helps!

6 0

4 years ago

Under the right conditions aluminum will react with chlorine to produce aluminum chloride.

salantis [7]

Answer:

$m_{Al}=9.42gAl$

Explanation:

Hello there!

In this case, according to the given chemical reaction:

2 Al + 3 Cl2 --> 2 AlCl3

Whereas there is a 2:3 mole ratio of aluminum to chlorine; it will be possible for us to calculate the required grams of aluminum by using the equality 22.4 L = 1 mol, the aforementioned mole ratio and the atomic mass of aluminum (27.0 g/mol) to obtain:

$m_{Al}=11.727LCl_2*\frac{1molCl_2}{22.4LCl_2}*\frac{2molAl}{3molCl_2} *\frac{27.0gAl}{1molAl} \\\\m_{Al}=9.42gAl$