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KATRIN_1 [288]
3 years ago
7

In the periodic table, which elements had complete outer shells? Also include name and symbol

Chemistry
1 answer:
Kobotan [32]3 years ago
7 0
Which ones r "happy" that would be Helium He and down
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The missing components in the table to the right
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The missing components in the table to the right are indicated with orange letters. Use the periodic table in the tools bar and this link Web Elements to fill in the corresponding values. A B C D E F G. 2. See answers. Log in to add ... F = 737.7kJ/mol. G = 495.8kJ/mol. Explanation: We are asked some of the ...

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4 0
3 years ago
Question 3 help me asap please
e-lub [12.9K]

Its chemical formula H2O, indicates that each of its molecules contains one oxygen and two hydrogen atoms, connected by covalent bonds. The hydrogen atoms are attached to the oxygen atom at an angle of 104.45°. "Water" is the name of the liquid state of H2O at standard conditions for temperature and pressure.

5 0
2 years ago
If 24.6 grams of lithium react with excess water, how many liters of hydrogen gas can be produced at 301 Kelvin and 1.01 atmosph
andreev551 [17]
Answer: 43.3 l


Explanation:

1) Chemical equation:
2 Li(s) + 2 H₂O (l) → 2LiOH(aq) + H₂ (g)

2) Mole ratios:

2 mol Li : 2 mol H₂O : 2 mol LiOH : 1 mol H₂

3) Number of moles of Li that react

n = mass in grams / atomic mass = 24.6g / 6.941 g/mol = 3.54 moles

4) Yield

Proportion:

2 mol Li / 1 mol H₂ = 3.54 mol  Li/ x


⇒ x = 3.54 mol Li × 1 mol H / 2 mol Li = 1.77 mol H₂

4) Ideal gas equation

PV = nRT ⇒ V = nRT / P

V = 1.77 mol × 0.0821 [atm×l / (mol×K)] × 301 K / 1.01 atm = 43.3 l


V = 43.3 l ← answer



7 0
3 years ago
Write the complete balanced equation for the reaction between barium metal (Ba) and nitrogen gas (N2). You do not need to make t
hichkok12 [17]

3Ba + N2 -----> Ba3N2


Ba is in the second group and metal, its charge = +2 in the compound.

N is non-metal, it is in 15th group, so it has 5 electrons on the last level, so it can take 3 electrons more(8-5=3). N has charge (-3) in compound.

Ba and N form compound Ba3N2.


3 0
2 years ago
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A good hypothesis must be which of the following?
yanalaym [24]
Testable, that is always required for a hypothesis. Otherwise, how can you prove it?
8 0
3 years ago
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