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Mekhanik [1.2K]
3 years ago
9

Determine which of the following elements would lose electrons when becoming ions:

Chemistry
1 answer:
Artemon [7]3 years ago
5 0

Answer:

I, III, and V  

Explanation:

All five options are correct.

However, your instructor is probably expecting the answer I, III, and V.

These three elements are on the left-hand side of the Periodic Table. Thus, they tend to lose electrons and form positive ions most easily.

H is the most reluctant to form a cation. Its first ionization energy is 1100 kJ·mol⁻¹.

However, F and He can lose electrons to form cations.

It takes only 1700 kJ·mol⁻¹ to remove an electron from F. However, F tends to add electrons to get a complete valence shell.

Even He, with a complete valence shell, will give up a valence electron for the expenditure of only 2400 kJ·mol⁻¹.

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What is the molality of the resulting solution when 15.0 g of Licl is combined with 105 g of water? 0/1 point 0 1.42 m 2.95 m 3.
xenn [34]

Answer:

3.37 m

Explanation:

<u>Number of moles of solute present in 1 kg of solvent is termed as molality</u>

It is represented by 'm'.

Thus,

Molality\ (m)=\frac {Moles\ of\ the\ solute}{Mass\ of\ the\ solvent\ (kg)}

Given that:

The mass of LiCl = 15.0 g

Molar mass of LiCl = 42.394 g/mol

The formula for the calculation of moles is shown below:

moles = \frac{Mass\ taken}{Molar\ mass}

Thus,

Moles= \frac{15.0\ g}{42.394\ g/mol}

Moles= 0.3538\ mol

Mass of the solvent = 105 g

Also, 1 g = 0.001 g

So,

Mass of water (solvent) = 0.105 kg

Molality is:

Molality\ (m)=\frac {0.3538}{0.105}\ m

<u>Molality = 3.37 m</u>

3 0
3 years ago
2. The number of molecules in 1.0 mole of So2 is the same as the number of molecules in:
m_a_m_a [10]

Answer:

1.0 moles of N2

Explanation:

since

1.0 × avogadro's no# = same answer for SO2 and N2

avogadro's no#= 6.02× 10²³

6 0
3 years ago
What are the terms for A, B, C?<br> C<br> А<br> В
Bas_tet [7]

Answer:

term of abc is cde efg hij klm nop

6 0
3 years ago
Explain how Beer’s law can be applied in food, drug or medical testing
KonstantinChe [14]
<h2>Answer with explanation:</h2>

<em><u>Beer's Law is described as if a light passes from a solution, the concentration of the solution is directly proportional to the  absorbance of light by that solution.</u></em>

Every element has a definite of absorbance of light.

In the testing of food, drugs or in medical testing, the light is passed from the sample.

Them transmitted light from these samples are measured. The difference between target light amount and transmitted light is the amount of absorbed light.

From this absorbed light value, we can identify an element in sample and its quantity.

Spectrophometry is based on this law.

8 0
3 years ago
Complete the table by writing correct formulas for the compounds formed by combining positive and negative ions. then name each
Gwar [14]
NH₄NO₃ - ammonium-nitrate.
(NH₄)₂CO₃ - ammonium carbonate.
NH₄CN - ammonium cyanide.
(NH₄)₃PO₄- ammonium phosphate.
Sn(NO₃)₄ - tin(IV) nitrate.
Sn(CO₃)₂ - tin(IV) carbonate.
Sn(CN)₄ - tin(IV) cyanide.
Sn₃(PO₄)₄ - tin(IV) phosphate.
Fe(NO₃)₃ - iron(III) nitrate.
Fe₂(CO₃)₃ - iron(III) carbonate.
Fe(CN)₃ - iron(III) cyanide.
FePO₄ - iron(III) phosphate.
Mg(NO₃)₂ - magnesium nitrate.
MgCO₃ - magnesium carbonate.
Mg(CN)₂ - magnesium cyanide.
Mg₃(PO₄)₂ - magnesium phosphate.
4 0
3 years ago
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