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3 years ago

Locate Lithium and oxygen on the periodic table. Briefly explain how these elements might combine to form a compound.

2 answers:

7 0

<span>Lithium atoms have one valence electron, where as oxygen atoms have six. Lithium atoms tend to give up their single valence electrons, and oxygen tends to gain two valence electrons from other atoms, like lithium. They do this so they will have filled valence shells. hope this answers your question :)</span>

zhuklara [117]3 years ago

5 0

Lithium is located in group 1 period 2 and oxygen is located in group 16 period 2. These two elements might combine to form a compound because of their oxidation state. Oxygen needs 2 electrons to be stable while lithium is willing to give away 2 electrons to become stable as well.

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Balance :FeCl3 + __Ca(OH)2 → ___ Fe(OH)3 + __ CaCl2

ArbitrLikvidat [17]

Your answer is 2:3:2:3

7 0

2 years ago

A mixture of H2 and water vapor is present in a closed vessel at 20. 00°C. The total pressure of the system is 755. 0 mmHg. The

MAVERICK [17]

The partial stress of H2 is 737.47 mmHg Let's observe the Ideal Gas Law to find out the whole mols.

We count on that the closed vessel has 1L of volume

P.V=n.R.T
We must convert mmHg to atm. 760 mmHg.
1 atm
755 mmHg (755/760) = 0.993 atm
0.993 m.1L=n.0.082 L.atm/mol.K .
293 K(0.993 atm 1.1L)/(0.082mol.K /L.atm).
293K = n
0.0413mols = n

These are the whole moles. Now we are able to know the moles of water vapor, to discover the molar fraction of it.

P.V=n.R.T
760 mmHg. 1 atm
17.5 mmHg (17.5 mmHg / 760 mmHg)=0.0230 atm
0.0230 m.1L=n.0.082 L.atm/mol.K.293 K(0.0230atm.1L)/(0.082mol.K/L.atm .293K)=n 9.58 × 10 ^ 4 mols = n.
Molar fraction = mols )f gas/general mols.
Molar fraction water vapor =9.58×10^ -four mols / 0.0413 mols
Sum of molar fraction =1
1 - 9.58 × 10 ^ 4 × mols / 0.0413 ×mols = molar fraction H2
0.9767 = molar fraction H2
H2 pressure / Total pressure =molar fraction H2
H2 pressure / 55mmHg = =0.9767 0.9767 = h2 pressure =755 mmHg.
737,47 mmHg.

<h3>What is a mole fraction?</h3>

Mole fraction is a unit of concentration, described to be identical to the variety of moles of an issue divided through the whole variety of moles of a solution. Because it's miles a ratio, mole fraction is a unitless expression.

Thus it is clear that the partial pressure of H2 is 737,47 mmHg.

To learn more about partial pressure refer to the link :

brainly.com/question/19813237

<h3 />

5 0

2 years ago

If most objects are made up of free space then why can we put our hands through a book or wall?

Mazyrski [523]

I suppose you mean to ask why we can't go through obstacles.

Any atom is surrounded by an electronic cloud. When two atoms get close to each other, the electronic clouds repel each other, preventing them from interpenetrating each other. That same phenomenon, on a larger scale, prevents us from going through matter.

4 0

3 years ago

How many moles of argon, Ar, are in 1.31×1024 Ar atoms?

ddd [48]

Answer:

2.18 mol Ar.

Explanation:

Hello there!

In this case, according to the definition of mole as the amount of particles of a given substance, it is possible to introduce the Avogadro's number to assert that 1 mole of any element contains 6.022x10²³ atoms; thus, the moles of Ar in the given amount of atoms turns out to be:

$1.31x10^{24}Ar atoms*\frac{1molAr}{6.022x10^{23}atoms}\\\\=2.18molAr$

Best regards!

5 0

2 years ago

A test tube contains a pure colourless gas. It is either oxygen,carbon dioxide,hydrogen or nitrogen. When a burning splint is pu

tekilochka [14]

The next test would be the lime water test.

Explanation:

If placing the gas in lime water will turn the solution milky, then the gas is most probably carbon dioxide, the lime water (Ca(OH)₂) turns milky due to the formation of solid CaCO₃ that is insoluble after reaction with carbon dioxide.

Carbon dioxide also puts out the flame in the splint test because it does not support combustion.

4 0

2 years ago